/* 1. Reset/base */
:root {
    --bg: #070a0f;
    --panel: #0d141f;
    --panel-2: #111a26;
    --panel-3: #141f2d;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text: #e6edf3;
    --muted: #8b9aad;
    --muted-2: #5e6b7a;
    --primary: #38bdf8;
    --success: #34d399;
    --warning: #f59e0b;
    --danger: #f43f5e;
    --violet: #a78bfa;
    --radius: 18px;
    --radius-sm: 14px;
    --shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
    --shadow-soft: 0 4px 14px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--bg);
}

body {
    margin: 0;
    min-height: 100vh;
    padding: 32px;
    color: var(--text);
    font-family:
        "Figtree",
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    background:
        radial-gradient(
            circle at 50% -10%,
            rgba(255, 255, 255, 0.035),
            transparent 34%
        ),
        linear-gradient(
            180deg,
            color-mix(in srgb, var(--bg) 88%, white 5%) 0%,
            var(--bg) 58%,
            color-mix(in srgb, var(--bg) 88%, black 12%) 100%
        );
    overflow-x: hidden;
}

html.card-choice-lock,
body.card-choice-lock {
    overflow: hidden;
}

body.theme-futuristic {
    --bg: #070a0f;
    --panel: #0d141f;
    --panel-2: #111a26;
    --panel-3: #141f2d;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text: #e6edf3;
    --muted: #8b9aad;
    --muted-2: #5e6b7a;
    --primary: #38bdf8;
    --success: #34d399;
    --warning: #f59e0b;
    --danger: #f43f5e;
    background:
        radial-gradient(
            circle at 50% -10%,
            rgba(255, 255, 255, 0.035),
            transparent 34%
        ),
        linear-gradient(180deg, #0a1017 0%, var(--bg) 58%, #05070b 100%);
}

body.theme-medieval {
    --bg: #0f150f;
    --panel: #131a14;
    --panel-2: #182219;
    --panel-3: #202b20;
    --border: rgba(233, 211, 157, 0.13);
    --border-strong: rgba(233, 211, 157, 0.24);
    --text: #f3ead7;
    --muted: #bca982;
    --muted-2: #877a63;
    --primary: #d8b35a;
    --success: #7fa66a;
    --warning: #c9873f;
    --danger: #b76255;
    background:
        radial-gradient(
            circle at 50% -12%,
            rgba(243, 234, 215, 0.04),
            transparent 34%
        ),
        linear-gradient(180deg, #131a14 0%, var(--bg) 58%, #090d0a 100%);
}

.is-hidden {
    display: none !important;
}

button {
    border: 0;
    color: inherit;
    font: inherit;
}

button:not(:disabled) {
    cursor: pointer;
}

button:disabled {
    cursor: not-allowed;
}

button:focus-visible {
    outline: 2px solid rgba(56, 189, 248, 0.85);
    outline-offset: 3px;
}

[data-lucide],
svg.lucide {
    width: 14px;
    height: 14px;
    stroke-width: 2;
    flex: 0 0 auto;
}

.button [data-lucide],
.button svg.lucide {
    width: 14px;
    height: 14px;
    stroke-width: 2.15;
}

/* 2. Layout */
.app-shell {
    width: 100%;
    max-width: 1800px;
    margin: 0 auto;
    padding: 24px 0 36px;
}

/* 3. Mode menu */
.mode-menu {
    --menu-bg: #0a0f0d;
    --menu-panel: rgba(14, 20, 18, 0.88);
    --menu-panel-strong: rgba(17, 25, 22, 0.96);
    --menu-border: rgba(232, 218, 182, 0.14);
    --menu-border-strong: rgba(232, 218, 182, 0.24);
    --menu-text: #f4ecd9;
    --menu-muted: #b8aa88;
    --menu-gold: #d8b35a;
    --menu-cyan: #44c7f4;
    --menu-green: #86ad74;
    position: relative;
    isolation: isolate;
    min-height: calc(100vh - 92px);
    display: grid;
    align-content: center;
    gap: 30px;
    color: var(--menu-text);
}

.mode-menu::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(
            circle at 50% 0%,
            rgba(255, 255, 255, 0.035),
            transparent 34%
        ),
        linear-gradient(180deg, #111412 0%, #0b0e0d 48%, #050706 100%);
}

.mode-menu::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.1;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: linear-gradient(
        180deg,
        transparent,
        black 18%,
        black 72%,
        transparent
    );
}

.mode-hero {
    max-width: 900px;
}

.mode-hero h1 {
    margin: 0;
    max-width: 980px;
    color: var(--menu-text);
    font-size: clamp(2.7rem, 6vw, 5.8rem);
    line-height: 0.93;
    letter-spacing: 0;
    white-space: normal;
    text-transform: none;
    text-shadow: none;
}

.mode-hero .eyebrow {
    color: var(--menu-gold);
}

.mode-hero .subtitle {
    max-width: 680px;
    color: var(--menu-muted);
}

.continue-button {
    margin-top: 22px;
    min-height: 38px;
    border-color: var(--menu-border-strong);
    color: var(--menu-text);
    background: rgba(255, 255, 255, 0.025);
}

.continue-button:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.055);
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.mode-card {
    position: relative;
    overflow: hidden;
    min-height: 348px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    border: 1px solid var(--menu-border);
    border-radius: 18px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.045), transparent 48%),
        var(--menu-panel);
    box-shadow:
        0 8px 22px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    padding: 26px;
    transition:
        border-color 180ms ease,
        box-shadow 180ms ease,
        transform 180ms ease,
        background 180ms ease;
}

.mode-card::before {
    content: "";
    position: absolute;
    inset: 0;
    opacity: 0.22;
    pointer-events: none;
}

.mode-card::after {
    content: "";
    position: absolute;
    left: 26px;
    right: 26px;
    top: 0;
    height: 2px;
    border-radius: 0 0 999px 999px;
    background: currentColor;
    opacity: 0.45;
}

.mode-card-futuristic::before {
    background:
        linear-gradient(rgba(68, 199, 244, 0.13) 1px, transparent 1px),
        linear-gradient(90deg, rgba(68, 199, 244, 0.1) 1px, transparent 1px);
    background-size: 42px 42px;
}

.mode-card-futuristic {
    color: var(--menu-cyan);
}

.mode-card-medieval {
    color: var(--menu-gold);
    background:
        linear-gradient(145deg, rgba(216, 179, 90, 0.06), transparent 50%),
        rgba(23, 20, 13, 0.9);
}

.mode-card-medieval::before {
    background:
        radial-gradient(
            circle at 15% 18%,
            rgba(216, 179, 90, 0.24),
            transparent 18%
        ),
        radial-gradient(
            circle at 88% 82%,
            rgba(134, 173, 116, 0.12),
            transparent 24%
        );
}

.mode-card > * {
    position: relative;
    z-index: 1;
}

.mode-card-icon {
    display: grid;
    width: 52px;
    height: 52px;
    place-items: center;
    border: 1px solid currentColor;
    border-radius: 16px;
    background:
        radial-gradient(
            circle at 50% 0%,
            color-mix(in srgb, currentColor 22%, transparent),
            transparent 65%
        ),
        rgba(255, 255, 255, 0.035);
}

.mode-card-futuristic .mode-card-icon,
.mode-card-futuristic li svg.lucide,
.mode-card-futuristic li [data-lucide] {
    color: var(--menu-cyan);
}

.mode-card-futuristic .button-primary {
    background: var(--menu-cyan);
    color: #06111a;
}

.mode-card-medieval .mode-card-icon,
.mode-card-medieval li svg.lucide,
.mode-card-medieval li [data-lucide] {
    color: var(--menu-gold);
}

.mode-card-medieval .button-primary {
    background: var(--menu-gold);
    color: #15110a;
}

.mode-card-icon svg.lucide,
.mode-card-icon [data-lucide] {
    width: 25px;
    height: 25px;
}

.mode-card h2 {
    margin: 0;
    color: var(--menu-text);
    font-size: clamp(1.6rem, 2.5vw, 2.2rem);
    letter-spacing: -0.03em;
}

.mode-card .section-kicker {
    color: color-mix(in srgb, currentColor 64%, var(--menu-muted));
}

.mode-card p {
    max-width: 560px;
    margin: 0;
    color: var(--menu-muted);
    font-size: 1rem;
    line-height: 1.55;
}

.mode-card ul {
    display: grid;
    gap: 10px;
    margin: 0 0 auto;
    padding: 0;
    list-style: none;
}

.mode-card li {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--menu-text);
    font-size: 0.94rem;
}

.mode-card li svg.lucide,
.mode-card li [data-lucide] {
    width: 16px;
    height: 16px;
}

.mode-card .button {
    min-width: 204px;
    min-height: 42px;
}

.mode-card.is-last {
    border-color: var(--menu-border-strong);
    box-shadow:
        0 8px 22px rgba(0, 0, 0, 0.1),
        0 0 0 1px color-mix(in srgb, currentColor 24%, transparent),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.mode-card:hover {
    border-color: color-mix(in srgb, currentColor 38%, var(--menu-border));
    transform: translateY(-2px);
}

.game-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 318px;
    gap: 16px;
    align-items: start;
    transition: grid-template-columns 180ms ease;
}

.game-layout.sidebar-collapsed {
    grid-template-columns: minmax(0, 1fr) 74px;
}

.board-card,
.control-panel,
.hud-card {
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--panel) 94%, black 6%);
}

/* 4. Header */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    margin-bottom: 16px;
}

.hero-copy {
    min-width: 0;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.24em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-family: "Figtree", system-ui, sans-serif;
    font-size: clamp(2.4rem, 4.2vw, 4.4rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: 0.02em;
    white-space: nowrap;
    text-transform: uppercase;
    text-shadow: none;
}

.subtitle {
    margin: 10px 0 0;
    max-width: 720px;
    color: var(--muted);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.45;
}

.hero-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    padding-bottom: 0;
}

/* 5. HUD */
.hud {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}

.hud-card {
    position: relative;
    overflow: hidden;
    min-height: 82px;
    border-radius: var(--radius-sm);
    padding: 13px 14px;
}

.hud-card::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 0;
    height: 2px;
    border-radius: 99px 99px 0 0;
    background: var(--primary);
    opacity: 0.55;
}

.hud-card.danger::after,
.hud-card.danger .hud-label {
    color: var(--danger);
    background: var(--danger);
}

.hud-card.success::after,
.hud-card.success .hud-label {
    color: var(--success);
    background: var(--success);
}

.hud-card.primary::after,
.hud-card.primary .hud-label {
    color: var(--primary);
    background: var(--primary);
}

.hud-card.warning::after,
.hud-card.warning .hud-label {
    color: var(--warning);
    background: var(--warning);
}

.hud-card.neutral::after {
    background: rgba(230, 237, 243, 0.42);
}

.hud-card.neutral .hud-label {
    color: var(--muted);
}

.hud-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 9px;
    background: transparent !important;
}

.hud-label [data-lucide],
.hud-label svg.lucide {
    width: 22px;
    height: 22px;
    stroke-width: 2.2;
}

.hud-label span {
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.hud-card strong {
    display: block;
    font-size: clamp(1.18rem, 2vw, 1.45rem);
    font-weight: 600;
    letter-spacing: -0.03em;
}

/* 6. Game board/canvas */
.board-card {
    position: relative;
    overflow: hidden;
    border-radius: 22px;
    padding: 20px;
}

.board-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
    padding: 2px 2px 0;
}

.section-kicker {
    margin: 0;
    color: var(--muted-2);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.board-header h2 {
    margin: 4px 0 0;
    font-size: 1rem;
    font-weight: 500;
}

.board-tip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin: 0;
    color: var(--muted);
    font-size: 0.86rem;
}

.canvas-frame {
    position: relative;
    display: grid;
    place-items: center;
    width: 100%;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: color-mix(in srgb, var(--bg) 88%, black 12%);
}

.board-card .canvas-frame {
    border-color: transparent;
}

canvas {
    display: block;
    width: min(100%, 140vh, 1440px);
    max-height: min(70vh, 680px);
    aspect-ratio: 20 / 9;
    background: color-mix(in srgb, var(--bg) 88%, black 12%);
    touch-action: none;
}

body.is-dragging-tower {
    overflow: hidden;
    overscroll-behavior: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.board-focus-toggle,
.board-focus-hud {
    display: none;
}

.feedback {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 24px;
    margin: 18px 2px 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.feedback svg.lucide,
.feedback [data-lucide] {
    width: 15px;
    height: 15px;
    color: var(--primary);
    opacity: 0.9;
}

/* 7. Sidebar */
.control-panel {
    position: sticky;
    top: 16px;
    border-radius: 22px;
    padding: 14px;
    overflow: visible;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 120px),
        radial-gradient(
            circle at 100% 0%,
            color-mix(in srgb, var(--primary) 11%, transparent),
            transparent 170px
        ),
        color-mix(in srgb, var(--panel) 94%, black 6%);
    transition: padding 180ms ease;
}

.action-panel {
    padding: 14px 0;
}

.button-start-wave {
    width: 100%;
    min-height: 44px;
    border: 1px solid color-mix(in srgb, var(--primary) 36%, transparent);
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.16);
    font-size: 0.95rem;
    letter-spacing: 0.01em;
}

.panel-section {
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
}

.panel-section:first-child {
    padding-top: 0;
}

.panel-section:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.section-heading i {
    color: var(--muted-2);
}

.sidebar-toggle {
    display: inline-grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: var(--muted);
    transition:
        background 160ms ease,
        border-color 160ms ease,
        color 160ms ease;
}

.sidebar-toggle:hover {
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
}

.sidebar-toggle svg.lucide,
.sidebar-toggle [data-lucide] {
    width: 15px;
    height: 15px;
}

.mini-note {
    color: var(--muted-2);
    font-size: 0.76rem;
    font-weight: 500;
}

.selected-readout {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    max-width: 100%;
    padding: 5px 0;
    border-radius: 999px;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
}

.hint {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.84rem;
    line-height: 1.45;
}

.selection-panel {
    padding-bottom: 12px;
}

.selection-panel .section-heading {
    margin-bottom: 8px;
}

.selection-panel .hint {
    margin-top: 7px;
    color: var(--muted-2);
    font-size: 0.78rem;
    line-height: 1.35;
}

.upgrade-panel {
    display: grid;
    gap: 12px;
}

/* 8. Tower cards */
.tower-list {
    display: grid;
    gap: 9px;
}

.tower-card {
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: 52px 1fr;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 13px 14px 13px 12px;
    border: 1px solid color-mix(in srgb, var(--border) 82%, var(--primary) 18%);
    border-radius: 14px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.04), transparent 48%),
        var(--panel-2);
    text-align: left;
    touch-action: none;
    -webkit-tap-highlight-color: transparent;
    transition:
        background 160ms ease,
        border-color 160ms ease,
        box-shadow 160ms ease,
        transform 160ms ease,
        opacity 160ms ease;
}

.tower-card::before {
    content: "";
    position: absolute;
    inset: 10px auto 10px 0;
    width: 2px;
    border-radius: 0 99px 99px 0;
    background: currentColor;
    opacity: 0.55;
}

.tower-card[data-tower="basic"] {
    color: var(--primary);
}

.tower-card[data-tower="rapid"] {
    color: var(--success);
}

.tower-card[data-tower="heavy"] {
    color: var(--warning);
}

.tower-card:hover {
    border-color: var(--border-strong);
    background:
        linear-gradient(
            135deg,
            color-mix(in srgb, currentColor 8%, transparent),
            transparent 58%
        ),
        var(--panel-3);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.07);
    transform: translateY(-1px);
}

.tower-card:active {
    transform: translateY(0);
}

.tower-card.is-dragging {
    opacity: 0.55;
    transform: scale(0.98);
}

.tower-card.selected {
    border-color: currentColor;
    background:
        linear-gradient(
            135deg,
            color-mix(in srgb, currentColor 12%, transparent),
            transparent 60%
        ),
        var(--panel-2);
}

.tower-card.unavailable:not(.selected) {
    opacity: 0.68;
}

.tower-card.unavailable:not(.selected):hover {
    border-color: var(--border);
    background: var(--panel-2);
}

.tower-token {
    display: grid;
    width: 50px;
    height: 50px;
    place-items: center;
    border: 1px solid currentColor;
    border-radius: 16px;
    background:
        radial-gradient(
            circle at 50% 0%,
            color-mix(in srgb, currentColor 18%, transparent),
            transparent 60%
        ),
        rgba(255, 255, 255, 0.035);
}

.tower-token svg.lucide,
.tower-token [data-lucide] {
    width: 20px;
    height: 20px;
}

.tower-token.basic {
    color: var(--primary);
}

.tower-token.rapid {
    color: var(--success);
}

.tower-token.heavy {
    color: var(--warning);
}

.tower-drag-ghost {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 9999;
    display: grid;
    width: 58px;
    height: 58px;
    place-items: center;
    border-radius: 18px;
    pointer-events: none;
    opacity: 0.95;
    transform: translate3d(-999px, -999px, 0);
    transition:
        opacity 120ms ease,
        filter 120ms ease;
    will-change: transform;
}

.tower-drag-ghost .tower-token {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background:
        radial-gradient(circle at 50% 0%, color-mix(in srgb, currentColor 28%, transparent), transparent 62%),
        color-mix(in srgb, var(--panel-2) 86%, black 14%);
    box-shadow:
        0 10px 22px rgba(0, 0, 0, 0.34),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.tower-drag-ghost.is-over-canvas {
    opacity: 0.62;
}

.tower-drag-ghost.is-valid {
    filter: drop-shadow(0 8px 18px rgba(74, 222, 128, 0.35));
}

.tower-drag-ghost.is-invalid {
    opacity: 0.58;
    filter: drop-shadow(0 8px 18px rgba(248, 113, 113, 0.35));
}

.tower-drag-ghost.is-over-canvas,
.tower-drag-ghost.is-over-canvas.is-valid,
.tower-drag-ghost.is-over-canvas.is-invalid {
    opacity: 0;
    filter: none;
}

.tower-title {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 5px;
}

.tower-title strong {
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.15;
}

.tower-title em {
    min-width: 34px;
    padding: 2px 7px;
    border: 1px solid color-mix(in srgb, currentColor 28%, transparent);
    border-radius: 999px;
    color: var(--text);
    background: rgba(255, 255, 255, 0.035);
    font-size: 0.82rem;
    font-style: normal;
    font-weight: 600;
    line-height: 1.2;
    text-align: center;
}

.tower-copy small {
    display: block;
    max-width: 220px;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.35;
}

.theme-medieval .tower-card {
    --medieval-card-accent: #d6a84f;
    --medieval-card-accent-dark: #a87b29;
    --medieval-card-surface: color-mix(
        in srgb,
        var(--panel-2) 82%,
        #2a2118 18%
    );
    grid-template-columns: 58px 1fr;
    gap: 15px;
    padding: 14px 15px 14px 13px;
    border-color: color-mix(
        in srgb,
        var(--medieval-card-accent) 22%,
        var(--border)
    );
    background:
        linear-gradient(
            135deg,
            color-mix(in srgb, var(--medieval-card-accent) 7%, transparent),
            transparent 54%
        ),
        linear-gradient(180deg, rgba(255, 244, 214, 0.045), transparent 64%),
        var(--medieval-card-surface);
    box-shadow:
        inset 0 1px 0 rgba(255, 244, 214, 0.06),
        0 8px 18px rgba(0, 0, 0, 0.08);
}

.theme-medieval .tower-card::before {
    width: 3px;
    background: linear-gradient(
        180deg,
        var(--medieval-card-accent),
        var(--medieval-card-accent-dark)
    );
    opacity: 0.82;
}

.theme-medieval .tower-card::after {
    content: "";
    position: absolute;
    inset: 1px;
    border-radius: inherit;
    background:
        linear-gradient(90deg, rgba(231, 216, 182, 0.035), transparent 30%),
        radial-gradient(
            circle at 20% 0%,
            color-mix(in srgb, var(--medieval-card-accent) 12%, transparent),
            transparent 44%
        );
    pointer-events: none;
}

.theme-medieval .tower-card[data-tower="basic"] {
    --medieval-card-accent: #d6a84f;
    --medieval-card-accent-dark: #8b7355;
}

.theme-medieval .tower-card[data-tower="rapid"] {
    --medieval-card-accent: #8fb877;
    --medieval-card-accent-dark: #4f6a43;
}

.theme-medieval .tower-card[data-tower="heavy"] {
    --medieval-card-accent: #d6a84f;
    --medieval-card-accent-dark: #8f2e2e;
}

.theme-medieval .tower-card:hover {
    border-color: color-mix(
        in srgb,
        var(--medieval-card-accent) 58%,
        var(--border-strong)
    );
    background:
        linear-gradient(
            135deg,
            color-mix(in srgb, var(--medieval-card-accent) 11%, transparent),
            transparent 58%
        ),
        linear-gradient(180deg, rgba(255, 244, 214, 0.065), transparent 64%),
        color-mix(in srgb, var(--panel-3) 82%, #2f2418 18%);
    box-shadow:
        inset 0 1px 0 rgba(255, 244, 214, 0.08),
        0 10px 22px rgba(0, 0, 0, 0.12);
}

.theme-medieval .tower-card.selected {
    border-color: var(--medieval-card-accent);
    background:
        linear-gradient(
            135deg,
            color-mix(in srgb, var(--medieval-card-accent) 15%, transparent),
            transparent 62%
        ),
        linear-gradient(180deg, rgba(255, 244, 214, 0.07), transparent 66%),
        color-mix(in srgb, var(--panel-2) 76%, #342613 24%);
    box-shadow:
        0 0 0 1px
            color-mix(in srgb, var(--medieval-card-accent) 28%, transparent),
        inset 0 1px 0 rgba(255, 244, 214, 0.1),
        0 12px 26px rgba(0, 0, 0, 0.16);
}

.theme-medieval .tower-card.unavailable:not(.selected) {
    opacity: 0.62;
    filter: saturate(0.72);
}

.theme-medieval .tower-card.unavailable:not(.selected) .tower-token {
    filter: grayscale(0.36);
}

.theme-medieval .tower-title strong {
    font-weight: 700;
    letter-spacing: 0;
}

.theme-medieval .tower-title em {
    border-color: color-mix(
        in srgb,
        var(--medieval-card-accent) 36%,
        rgba(231, 216, 182, 0.18)
    );
    background:
        linear-gradient(180deg, rgba(231, 216, 182, 0.1), rgba(0, 0, 0, 0.08)),
        rgba(18, 23, 18, 0.66);
    color: #f3ead7;
}

.theme-medieval .tower-copy small {
    color: color-mix(in srgb, var(--muted) 78%, #e7d8b6 22%);
}

.theme-medieval .tower-token {
    width: 54px;
    height: 54px;
    border-color: color-mix(in srgb, var(--medieval-card-accent) 62%, #5f4d38);
    border-radius: 16px;
    background:
        radial-gradient(
            circle at 50% 16%,
            color-mix(in srgb, var(--medieval-card-accent) 16%, transparent),
            transparent 58%
        ),
        linear-gradient(180deg, rgba(231, 216, 182, 0.1), rgba(0, 0, 0, 0.08)),
        #171f18;
    box-shadow:
        inset 0 1px 0 rgba(255, 244, 214, 0.12),
        0 6px 14px rgba(0, 0, 0, 0.16);
}

.theme-medieval .tower-token svg.lucide,
.theme-medieval .tower-token [data-lucide] {
    width: 22px;
    height: 22px;
    opacity: 1;
    stroke-width: 2;
}

/* 9. Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    gap: 8px;
    border-radius: 999px;
    padding: 0 15px;
    font-size: 0.9rem;
    font-weight: 600;
    transition:
        background 160ms ease,
        border-color 160ms ease,
        color 160ms ease,
        opacity 160ms ease,
        transform 160ms ease;
}

.button:hover:not(:disabled) {
    transform: translateY(-1px);
}

.button:active:not(:disabled) {
    transform: translateY(0);
}

.button-primary {
    background: var(--primary);
    color: #06111a;
}

.button-primary:hover:not(:disabled) {
    filter: brightness(1.08);
}

.button-secondary {
    border: 1px solid var(--border-strong);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
}

.button-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.07);
}

.button-upgrade {
    width: 100%;
    border: 1px solid rgba(52, 211, 153, 0.25);
    background: rgba(52, 211, 153, 0.1);
    color: var(--success);
}

.button-upgrade:hover:not(:disabled) {
    background: rgba(52, 211, 153, 0.15);
    border-color: rgba(52, 211, 153, 0.42);
}

.button-sell {
    width: 100%;
    border: 1px solid rgba(244, 63, 94, 0.25);
    background: rgba(244, 63, 94, 0.1);
    color: var(--danger);
}

.button-sell:hover:not(:disabled) {
    background: rgba(244, 63, 94, 0.15);
    border-color: rgba(244, 63, 94, 0.42);
}

.button-sell svg.lucide,
.button-sell [data-lucide] {
    color: inherit;
}

.button:disabled {
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.04);
    color: var(--muted-2);
    opacity: 1;
}

.control-panel.is-collapsed {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 72px;
    min-height: auto;
    padding: 12px 10px;
    border-radius: 24px;
}

.control-panel.is-collapsed .panel-section {
    display: grid;
    justify-items: center;
    order: 3;
    width: 100%;
    padding: 12px 0;
}

.control-panel.is-collapsed .selection-panel {
    order: 1;
    padding-top: 0;
}

.control-panel.is-collapsed .action-panel {
    order: 2;
}

.control-panel.is-collapsed .upgrade-panel {
    display: grid;
    justify-items: center;
    gap: 12px;
    order: 4;
    border-bottom: 0;
}

.control-panel.is-collapsed .section-heading {
    justify-content: center;
    width: 100%;
    margin-bottom: 0;
}

.control-panel.is-collapsed .sidebar-toggle,
.control-panel.is-collapsed .tower-card,
.control-panel.is-collapsed .button-start-wave,
.control-panel.is-collapsed .button-upgrade,
.control-panel.is-collapsed .button-sell {
    width: 48px;
    height: 48px;
    min-height: 48px;
    border-radius: 15px;
}

.control-panel.is-collapsed .selection-panel,
.control-panel.is-collapsed .action-panel,
.control-panel.is-collapsed .panel-section:not(.upgrade-panel) {
    border-bottom: 1px solid var(--border);
}

.control-panel.is-collapsed .selection-panel {
    border-top: 0;
}

.control-panel.is-collapsed .upgrade-panel {
    border-bottom: 0;
}

.control-panel.is-collapsed .section-kicker,
.control-panel.is-collapsed .mini-note,
.control-panel.is-collapsed .selected-readout,
.control-panel.is-collapsed .hint,
.control-panel.is-collapsed .tower-copy,
.control-panel.is-collapsed .button span {
    display: none;
}

.control-panel.is-collapsed .tower-list {
    gap: 12px;
    justify-items: center;
}

.control-panel.is-collapsed .tower-card {
    display: grid;
    grid-template-columns: 1fr;
    place-items: center;
    padding: 0;
}

.control-panel.is-collapsed .tower-card::before {
    display: none;
}

.control-panel.is-collapsed .tower-token {
    width: 34px;
    height: 34px;
    border-radius: 12px;
}

.control-panel.is-collapsed .button-upgrade,
.control-panel.is-collapsed .button-sell {
    padding: 0;
    justify-content: center;
}

.control-panel.is-collapsed .button-upgrade svg.lucide,
.control-panel.is-collapsed .button-upgrade [data-lucide],
.control-panel.is-collapsed .button-sell svg.lucide,
.control-panel.is-collapsed .button-sell [data-lucide] {
    width: 19px;
    height: 19px;
}

.control-panel.is-collapsed .button-start-wave svg.lucide,
.control-panel.is-collapsed .button-start-wave [data-lucide],
.control-panel.is-collapsed .sidebar-toggle svg.lucide,
.control-panel.is-collapsed .sidebar-toggle [data-lucide] {
    width: 19px;
    height: 19px;
}

.control-panel.is-collapsed .upgrade-panel {
    padding-bottom: 6px;
}

.control-panel.is-collapsed .button-start-wave {
    padding: 0;
}

body.card-choice-lock .control-panel.is-collapsed {
    z-index: 0;
}

/* 10. States */
.game-over {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(7, 10, 15, 0.78);
    backdrop-filter: blur(10px);
    opacity: 1;
    transition: opacity 180ms ease;
}

.game-over.hidden {
    pointer-events: none;
    opacity: 0;
}

.game-over-panel {
    width: min(380px, 100%);
    padding: 24px;
    border: 1px solid rgba(244, 63, 94, 0.24);
    border-radius: 22px;
    background: color-mix(in srgb, var(--panel) 94%, black 6%);
    box-shadow: var(--shadow);
    text-align: center;
}

.game-over-icon {
    display: inline-grid;
    width: 44px;
    height: 44px;
    place-items: center;
    margin-bottom: 12px;
    border: 1px solid rgba(244, 63, 94, 0.28);
    border-radius: 15px;
    color: var(--danger);
    background: rgba(244, 63, 94, 0.08);
}

.game-over-icon i,
.game-over-icon svg.lucide {
    width: 21px;
    height: 21px;
}

.game-over-panel h2 {
    margin: 5px 0 12px;
    color: var(--text);
    font-size: 2rem;
    letter-spacing: -0.04em;
}

.game-over-panel p {
    margin: 8px 0;
    color: var(--muted);
}

.game-over-panel strong {
    color: var(--text);
}

.game-over-panel .button {
    margin-top: 14px;
}

.game-over-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.card-choice-overlay {
    --choice-bg-color: #0b0d0a;
    --choice-panel-bg: rgba(22, 26, 22, 0.94);
    --choice-card-bg: #1a1e19;
    --choice-card-bg-hover: #222720;
    --choice-text-main: #e8eade;
    --choice-text-bright: #ffffff;
    --choice-text-muted: #9fa596;
    --choice-text-dark: #7a8071;
    --choice-accent: #c5a769;
    --choice-accent-soft: rgba(197, 167, 105, 0.15);
    --choice-border-subtle: #2d332a;
    --choice-border-medium: #3d4538;
    --choice-border-highlight: #5c6654;
    position: fixed;
    inset: 0;
    z-index: 120;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 32px 20px;
    background:
        radial-gradient(
            circle at 50% 28%,
            rgba(20, 28, 19, 0.5),
            rgba(5, 7, 5, 0.84) 72%
        ),
        rgba(5, 7, 5, 0.78);
    box-shadow: inset 0 0 180px rgba(0, 0, 0, 0.42);
    contain: layout paint;
    opacity: 1;
    transition: opacity 160ms ease;
}

.card-choice-overlay.is-hidden {
    pointer-events: none;
    opacity: 0;
}

.card-choice-panel {
    position: relative;
    width: min(1100px, 100%);
    margin-block: auto;
    overflow: visible;
    padding: 56px 48px;
    border: 1px solid rgba(61, 69, 56, 0.6);
    border-radius: 16px;
    background-color: var(--choice-panel-bg);

    animation: cardChoiceFadeIn 320ms ease-out both;
}

.card-choice-panel::before,
.card-choice-panel::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--choice-accent);
    border-radius: 4px;
    pointer-events: none;
}

.card-choice-panel::before {
    top: 20px;
    left: 20px;
    border-right: 0;
    border-bottom: 0;
}

.card-choice-panel::after {
    right: 20px;
    bottom: 20px;
    border-top: 0;
    border-left: 0;
}

.card-choice-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 auto 56px;
    text-align: center;
}

.card-choice-header .eyebrow {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0 0 24px;
    padding: 6px 16px;
    border: 1px solid color-mix(in srgb, var(--choice-accent) 50%, transparent);
    border-radius: 20px;
    color: var(--choice-accent);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: uppercase;
    white-space: nowrap;
}

.card-choice-header .eyebrow::before,
.card-choice-header .eyebrow::after {
    content: "";
    position: absolute;
    top: 50%;
    width: 20px;
    height: 1px;
    background-color: color-mix(in srgb, var(--choice-accent) 30%, transparent);
}

.card-choice-header .eyebrow::before {
    left: -30px;
}

.card-choice-header .eyebrow::after {
    right: -30px;
}

.card-choice-header h2 {
    margin: 0;
    color: var(--choice-text-bright);
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: 0;
    line-height: 1.1;
    text-transform: none;
}

.card-choice-header p {
    max-width: 90%;
    margin: 12px auto 0;
    color: var(--choice-text-muted);
    font-size: 1.08rem;
    font-weight: 400;
    line-height: 1.45;
}

.card-choice-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: stretch;
}

.upgrade-card {
    position: relative;
    display: flex;
    min-height: 406px;
    flex-direction: column;
    padding: 32px 24px;
    border: 1px solid var(--choice-border-subtle);
    border-radius: 8px;
    background-color: var(--choice-card-bg);
    color: var(--choice-text-main);
    text-align: left;
    cursor: default;
    opacity: 0;
    transform: translateY(20px);
    animation: cardChoiceSlideUp 320ms ease-out forwards;
    transition:
        background-color 300ms ease,
        border-color 300ms ease,
        transform 300ms ease;
}

.upgrade-card:nth-child(1) {
    animation-delay: 60ms;
}

.upgrade-card:nth-child(2) {
    animation-delay: 120ms;
}

.upgrade-card:nth-child(3) {
    animation-delay: 180ms;
}

.upgrade-card::before,
.upgrade-card::after {
    content: "";
    position: absolute;
    width: 12px;
    height: 12px;
    border: 2px solid transparent;
    pointer-events: none;
    transition: border-color 300ms ease;
    z-index: 2;
}

.upgrade-card::before {
    top: -1px;
    left: -1px;
    border-right: 0;
    border-bottom: 0;
    border-top-left-radius: 8px;
}

.upgrade-card::after {
    right: -1px;
    bottom: -1px;
    border-top: 0;
    border-left: 0;
    border-bottom-right-radius: 8px;
}

.upgrade-card:hover,
.upgrade-card:focus-within {
    border-color: var(--choice-border-highlight);
    background-color: var(--choice-card-bg-hover);
    transform: translateY(-4px);
}

.upgrade-card:hover::before,
.upgrade-card:hover::after,
.upgrade-card:focus-within::before,
.upgrade-card:focus-within::after {
    border-color: var(--choice-accent);
}

.upgrade-card-main {
    display: grid;
    flex: 1;
    align-content: start;
}

.upgrade-card-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 32px;
}

.upgrade-card-rarity,
.upgrade-card-category {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: var(--choice-text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: uppercase;
}

.upgrade-card-rarity svg.lucide,
.upgrade-card-rarity [data-lucide] {
    width: 11px;
    height: 11px;
    fill: currentColor;
    stroke-width: 1.7;
}

.upgrade-card-category {
    min-width: 0;
    text-align: right;
}

.upgrade-card-icon {
    display: flex;
    margin-bottom: 24px;
    color: var(--choice-text-main);
}

.upgrade-card-icon svg.lucide,
.upgrade-card-icon [data-lucide] {
    width: 32px;
    height: 32px;
    stroke-width: 1.5;
}

.upgrade-card h3 {
    margin: 0;
    color: var(--choice-text-main);
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 0;
    line-height: 1.2;
    overflow-wrap: anywhere;
}

.upgrade-card-description {
    margin: 16px 0 24px;
    color: #d1d5cb;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
}

.upgrade-card-flavor {
    margin: auto 0 32px;
    padding-left: 12px;
    border-left: 2px solid var(--choice-border-subtle);
    color: var(--choice-text-dark);
    font-size: 0.85rem;
    font-style: italic;
    line-height: 1.5;
}

.upgrade-card-action {
    display: inline-flex;
    position: relative;
    width: 100%;
    min-height: 50px;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    overflow: hidden;
    padding: 0 20px;
    border: 1px solid var(--choice-border-medium);
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--choice-text-main);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: uppercase;
    outline: 0;
    transition:
        background-color 300ms ease,
        border-color 300ms ease,
        color 300ms ease;
}

.upgrade-card-action:hover,
.upgrade-card-action:focus-visible {
    border-color: var(--choice-text-main);
    background-color: var(--choice-text-main);
    color: var(--choice-bg-color);
}

.upgrade-card-action svg.lucide,
.upgrade-card-action [data-lucide] {
    width: 18px;
    height: 18px;
    stroke-width: 2;
    transition: transform 300ms ease;
}

.upgrade-card-action:hover svg.lucide,
.upgrade-card-action:hover [data-lucide],
.upgrade-card-action:focus-visible svg.lucide,
.upgrade-card-action:focus-visible [data-lucide] {
    transform: translateX(4px);
}

.upgrade-card.rarity-rare {
    border-color: color-mix(in srgb, var(--choice-accent) 40%, transparent);
    background: linear-gradient(
        180deg,
        var(--choice-card-bg) 0%,
        var(--choice-accent-soft) 100%
    );
}

.upgrade-card.rarity-rare:hover,
.upgrade-card.rarity-rare:focus-within,
.upgrade-card.rarity-epic:hover,
.upgrade-card.rarity-epic:focus-within {
    border-color: var(--choice-accent);
}

.upgrade-card.rarity-rare .upgrade-card-rarity,
.upgrade-card.rarity-rare .upgrade-card-icon,
.upgrade-card.rarity-epic .upgrade-card-rarity,
.upgrade-card.rarity-epic .upgrade-card-icon {
    color: var(--choice-accent);
    filter: drop-shadow(0 0 6px var(--choice-accent-soft));
}

.upgrade-card.rarity-rare .upgrade-card-action,
.upgrade-card.rarity-epic .upgrade-card-action {
    border-color: var(--choice-accent);
    color: var(--choice-accent);
}

.upgrade-card.rarity-rare .upgrade-card-action:hover,
.upgrade-card.rarity-rare .upgrade-card-action:focus-visible,
.upgrade-card.rarity-epic .upgrade-card-action:hover,
.upgrade-card.rarity-epic .upgrade-card-action:focus-visible {
    border-color: var(--choice-accent);
    background-color: var(--choice-accent);
    color: var(--choice-bg-color);
}

.theme-futuristic .card-choice-overlay {
    --choice-bg-color: #070a0f;
    --choice-panel-bg: rgba(13, 20, 31, 0.94);
    --choice-card-bg: #111a26;
    --choice-card-bg-hover: #172231;
    --choice-text-main: #e6edf3;
    --choice-text-bright: #ffffff;
    --choice-text-muted: #8b9aad;
    --choice-text-dark: #6f7b8a;
    --choice-accent: #38bdf8;
    --choice-accent-soft: rgba(56, 189, 248, 0.15);
    --choice-border-subtle: #263341;
    --choice-border-medium: #334557;
    --choice-border-highlight: #4c667c;
    background:
        radial-gradient(
            circle at 50% 28%,
            rgba(19, 34, 46, 0.5),
            rgba(3, 6, 10, 0.84) 72%
        ),
        rgba(3, 6, 10, 0.78);
}

.theme-medieval .card-choice-panel {
    background:
        linear-gradient(180deg, rgba(197, 167, 105, 0.03), transparent 54%),
        var(--choice-panel-bg);
}

@keyframes cardChoiceFadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes cardChoiceSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 950px) {
    .card-choice-panel {
        padding: 48px 36px;
    }

    .card-choice-header {
        margin-bottom: 40px;
    }

    .card-choice-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 20px;
    }

    .upgrade-card:nth-child(3) {
        grid-column: 1 / -1;
        justify-self: center;
        width: 100%;
        max-width: calc(50% - 10px);
    }
}

/* 11. Responsive */
@media (max-width: 1120px) {
    .hud {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .game-layout {
        grid-template-columns: 1fr;
    }

    .game-layout.sidebar-collapsed {
        grid-template-columns: 1fr;
    }

    .board-card {
        min-height: auto;
    }

    .control-panel {
        position: sticky;
        top: 16px;
        display: block;
        min-height: auto;
    }

    .control-panel:not(.is-collapsed) .sidebar-toggle {
        width: 38px;
        height: 38px;
        border-color: rgba(255, 255, 255, 0.12);
        border-radius: 13px;
        background: rgba(255, 255, 255, 0.025);
        color: var(--text);
    }

    .control-panel:not(.is-collapsed) .sidebar-toggle:hover,
    .control-panel:not(.is-collapsed) .sidebar-toggle:focus-visible {
        border-color: rgba(255, 255, 255, 0.2);
        background: rgba(255, 255, 255, 0.055);
    }

    .control-panel:not(.is-collapsed) .sidebar-toggle svg.lucide,
    .control-panel:not(.is-collapsed) .sidebar-toggle [data-lucide] {
        width: 18px;
        height: 18px;
    }

    .control-panel.is-collapsed {
        position: sticky;
        top: 16px;
        display: grid;
        grid-template-columns: repeat(4, auto);
        align-items: center;
        justify-content: start;
        gap: 8px;
        width: fit-content;
        max-width: 100%;
        min-height: auto;
        padding: 12px 16px;
        border-radius: 20px;
        margin: 0 auto;
        box-shadow:
            0 14px 34px rgba(0, 0, 0, 0.18),
            inset 0 1px 0 rgba(255, 255, 255, 0.06);
    }

    .control-panel.is-collapsed .panel-section {
        display: flex;
        align-items: center;
        justify-content: center;
        width: auto;
        min-width: 0;
        padding: 0 12px;
        border-bottom: 0;
        border-right: 1px solid
            color-mix(in srgb, var(--border) 62%, transparent);
    }

    .control-panel.is-collapsed .selection-panel,
    .control-panel.is-collapsed .action-panel,
    .control-panel.is-collapsed .panel-section:not(.upgrade-panel) {
        border-bottom: 0;
    }

    .control-panel.is-collapsed .panel-section:last-child {
        border-right: 0;
    }

    .control-panel.is-collapsed .selection-panel {
        padding-left: 2px;
        padding-right: 8px;
    }

    .control-panel.is-collapsed .upgrade-panel {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 12px;
        padding-right: 4px;
    }

    .control-panel.is-collapsed .tower-list {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 12px;
    }

    .control-panel.is-collapsed .sidebar-toggle,
    .control-panel.is-collapsed .tower-card,
    .control-panel.is-collapsed .button-start-wave,
    .control-panel.is-collapsed .button-upgrade,
    .control-panel.is-collapsed .button-sell {
        flex: 0 0 48px;
        box-shadow:
            0 6px 14px rgba(0, 0, 0, 0.12),
            inset 0 1px 0 rgba(255, 255, 255, 0.08);
    }

    .control-panel.is-collapsed .sidebar-toggle {
        flex-basis: 30px;
        width: 30px;
        height: 40px;
        min-height: 40px;
        border-color: transparent;
        border-radius: 10px;
        background: transparent;
        box-shadow: none;
    }

    .control-panel.is-collapsed .sidebar-toggle:hover,
    .control-panel.is-collapsed .sidebar-toggle:focus-visible {
        border-color: transparent;
        background: transparent;
        color: var(--text);
    }
}

@media (pointer: coarse) {
    .tower-card {
        min-height: 64px;
    }
}

@media (max-width: 760px) {
    body {
        padding: 18px;
    }

    .card-choice-overlay {
        padding: 12px;
    }

    .card-choice-panel {
        padding: 36px 20px;
        border-radius: 12px;
    }

    .card-choice-panel::before,
    .card-choice-panel::after {
        width: 20px;
        height: 20px;
    }

    .card-choice-panel::before {
        top: 12px;
        left: 12px;
    }

    .card-choice-panel::after {
        right: 12px;
        bottom: 12px;
    }

    .card-choice-header {
        margin-bottom: 36px;
    }

    .card-choice-header .eyebrow {
        margin-bottom: 24px;
    }

    .card-choice-header .eyebrow::before,
    .card-choice-header .eyebrow::after {
        width: 12px;
    }

    .card-choice-header .eyebrow::before {
        left: -18px;
    }

    .card-choice-header .eyebrow::after {
        right: -18px;
    }

    .card-choice-header h2 {
        font-size: 1.9rem;
        line-height: 1.1;
    }

    .card-choice-header p {
        max-width: 100%;
        font-size: 0.95rem;
    }

    .card-choice-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .upgrade-card:nth-child(3) {
        grid-column: auto;
        max-width: 100%;
    }

    .upgrade-card {
        min-height: auto;
        padding: 24px 20px;
    }

    .upgrade-card-topline {
        margin-bottom: 24px;
    }

    .upgrade-card-icon {
        margin-bottom: 20px;
    }

    .upgrade-card h3 {
        font-size: 1.25rem;
    }

    .upgrade-card-description {
        margin-bottom: 20px;
    }

    .upgrade-card-flavor {
        margin-bottom: 24px;
    }

    .upgrade-card-action {
        min-height: 50px;
    }

    .mode-menu {
        min-height: calc(100vh - 52px);
    }

    .mode-grid {
        grid-template-columns: 1fr;
    }

    .mode-card {
        min-height: auto;
    }

    .app-shell {
        padding-top: 16px;
    }

    .game-app {
        display: flex;
        flex-direction: column;
    }

    h1 {
        font-size: clamp(3rem, 13vw, 5.4rem);
        white-space: normal;
    }

    .hero {
        display: contents;
    }

    .hero-copy {
        order: 1;
        margin-bottom: 16px;
    }

    .game-layout {
        display: contents;
    }

    .hero-actions {
        order: 5;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        margin-top: 14px;
        padding-bottom: 0;
    }

    .board-card {
        order: 2;
    }

    .board-focus-toggle {
        position: absolute;
        top: 14px;
        right: 14px;
        z-index: 10;
        display: inline-grid;
        width: 42px;
        height: 42px;
        place-items: center;
        border: 1px solid var(--border);
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.025);
        color: var(--muted);
        transition:
            background 160ms ease,
            border-color 160ms ease,
            color 160ms ease,
            transform 160ms ease;
    }

    .board-focus-toggle:hover,
    .board-focus-toggle:focus-visible {
        border-color: var(--border-strong);
        background: rgba(255, 255, 255, 0.055);
        color: var(--text);
    }

    .board-focus-toggle:active {
        transform: scale(0.96);
    }

    .board-focus-toggle svg.lucide,
    .board-focus-toggle [data-lucide] {
        width: 19px;
        height: 19px;
    }

    canvas {
        width: 100%;
        max-height: none;
        aspect-ratio: 16 / 19;
    }

    .control-panel {
        order: 3;
        margin-top: 14px;
        margin-bottom: 18px;
    }

    .hud {
        order: 4;
        margin-top: 0;
    }

    .hud {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hud-card {
        min-height: 74px;
        padding: 12px;
    }

    .board-card {
        min-height: auto;
        padding: 12px 8px;
    }

    .board-card,
    .control-panel {
        border-radius: 18px;
    }

    .board-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
        padding-left: 6px;
        padding-right: 52px;
    }

    .board-tip svg.lucide,
    .board-tip [data-lucide],
    .feedback svg.lucide,
    .feedback [data-lucide] {
        display: none;
    }

    body.board-focus-lock {
        overflow: hidden;
        padding: 0;
    }

    body.board-focus-lock .app-shell {
        width: 100%;
        max-width: none;
        padding: 0;
    }

    .game-app.board-focus-active .board-card {
        --board-focus-control-stack: 96px;
        --board-focus-stat-height: 64px;
        --board-focus-map-gap: 16px;
        --board-focus-bottom-space: calc(
            var(--board-focus-control-stack) + var(--board-focus-stat-height) +
                var(--board-focus-map-gap)
        );
        position: fixed;
        inset: 0;
        z-index: 70;
        display: block;
        min-height: 100dvh;
        padding: 0;
        border: 0;
        border-radius: 0;
        background: color-mix(in srgb, var(--bg) 96%, black 4%);
    }

    .game-app.board-focus-active .board-header,
    .game-app.board-focus-active .feedback {
        display: none;
    }

    .game-app.board-focus-active .board-focus-toggle {
        display: none;
    }

    .game-app.board-focus-active .canvas-frame {
        display: flex;
        align-items: flex-start;
        justify-content: center;
        width: 100%;
        height: calc(
            100dvh - var(--board-focus-bottom-space) -
                env(safe-area-inset-top) - env(safe-area-inset-bottom)
        );
        min-height: 0;
        overflow: hidden;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    .game-app.board-focus-active canvas {
        aspect-ratio: 16 / 19;
        flex: 0 0 auto;
        width: auto;
        max-width: none;
        height: min(max(100%, 118.75vw), 168vw);
        max-height: none;
        border-radius: 0;
    }

    .game-app.board-focus-active .board-focus-hud {
        position: fixed;
        right: auto;
        bottom: calc(
            var(--board-focus-control-stack) + env(safe-area-inset-bottom)
        );
        left: 50%;
        z-index: 88;
        display: grid;
        width: min(calc(100vw - 22px), 460px);
        max-width: calc(100vw - 22px);
        margin: 0;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 10px;
        pointer-events: none;
        transform: translateX(-50%);
    }

    .board-focus-stat {
        --focus-accent: rgba(230, 237, 243, 0.6);
        position: relative;
        overflow: hidden;
        display: grid;
        min-width: 0;
        gap: 4px;
        padding: 8px 10px;
        border: 1px solid
            color-mix(
                in srgb,
                var(--focus-accent) 18%,
                rgba(255, 255, 255, 0.08)
            );
        border-radius: 16px;
        background:
            linear-gradient(
                180deg,
                rgba(255, 255, 255, 0.07),
                rgba(255, 255, 255, 0.015) 52%,
                rgba(255, 255, 255, 0) 100%
            ),
            color-mix(in srgb, var(--panel) 88%, black 12%);
        box-shadow:
            0 14px 28px rgba(0, 0, 0, 0.2),
            inset 0 1px 0 rgba(255, 255, 255, 0.08);
        backdrop-filter: blur(12px);
    }

    .board-focus-stat::before {
        content: "";
        position: absolute;
        inset: 1px 1px auto;
        height: 46%;
        border-radius: 15px 15px 12px 12px;
        background: linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.08),
            transparent 80%
        );
        pointer-events: none;
    }

    .board-focus-stat::after {
        content: "";
        position: absolute;
        left: 12px;
        right: 12px;
        bottom: 0;
        height: 2px;
        border-radius: 999px 999px 0 0;
        background: color-mix(in srgb, var(--focus-accent) 78%, transparent);
        opacity: 0.82;
    }

    .board-focus-stat span {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0;
        width: 24px;
        height: 24px;
        min-width: 0;
        padding: 0;
        border: 1px solid
            color-mix(in srgb, var(--focus-accent) 22%, transparent);
        border-radius: 999px;
        background: color-mix(
            in srgb,
            var(--focus-accent) 10%,
            rgba(255, 255, 255, 0.02)
        );
        color: color-mix(in srgb, var(--text) 26%, var(--muted) 74%);
        font-size: 0.56rem;
        font-weight: 600;
        letter-spacing: 0.08em;
        line-height: 1.25;
        text-transform: uppercase;
    }

    .board-focus-stat small {
        display: none;
    }

    .board-focus-stat svg.lucide,
    .board-focus-stat [data-lucide] {
        width: 13px;
        height: 13px;
        flex: 0 0 auto;
    }

    .board-focus-stat strong {
        color: var(--text);
        font-size: 1.08rem;
        font-weight: 700;
        line-height: 1;
        letter-spacing: -0.04em;
        margin-left: 4px;
        text-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
    }

    .board-focus-stat.danger {
        --focus-accent: var(--danger);
    }

    .board-focus-stat.success {
        --focus-accent: var(--success);
    }

    .board-focus-stat.primary {
        --focus-accent: var(--primary);
    }

    .board-focus-stat.danger svg,
    .board-focus-stat.danger [data-lucide] {
        color: var(--danger);
    }

    .board-focus-stat.success svg,
    .board-focus-stat.success [data-lucide] {
        color: var(--success);
    }

    .board-focus-stat.primary svg,
    .board-focus-stat.primary [data-lucide] {
        color: var(--primary);
    }

    .game-app.board-focus-active .control-panel.is-collapsed {
        position: fixed;
        top: auto;
        right: auto;
        bottom: max(14px, env(safe-area-inset-bottom));
        left: 50%;
        z-index: 90;
        width: max-content;
        max-width: calc(100vw - 22px);
        margin: 0;
        transform: translateX(-50%);
    }

    body.card-choice-lock .game-app.board-focus-active .board-card {
        z-index: 130;
    }

    body.card-choice-lock
        .game-app.board-focus-active
        .control-panel.is-collapsed {
        z-index: 60;
        pointer-events: none;
    }

    .control-panel {
        position: static;
        min-height: auto;
        max-height: none;
        overflow: visible;
        display: block;
    }

    .control-panel.is-collapsed {
        position: static;
        grid-template-columns: repeat(4, auto);
        gap: 6px;
        margin: 14px auto 32px;
    }

    .control-panel.is-collapsed .panel-section {
        padding: 0 8px;
    }

    .control-panel.is-collapsed .tower-list {
        gap: 10px;
    }

    .panel-section {
        padding: 13px 0;
        border-bottom: 1px solid var(--border);
    }

    .panel-section:last-child {
        border-bottom: 0;
    }
}

@media (min-width: 600px) and (max-width: 760px) {
    .game-app.board-focus-active .canvas-frame {
        width: 600px;
        max-width: 100vw;
        margin-inline: auto;
        border-left: 1px solid var(--border-strong);
        border-right: 1px solid var(--border-strong);
    }

    .game-app.board-focus-active canvas {
        width: 100%;
        height: auto;
        max-width: 100%;
    }
}

@media (max-width: 460px) {
    .game-app.board-focus-active .board-card {
        --board-focus-control-stack: 88px;
        --board-focus-stat-height: 60px;
    }

    .hero-actions {
        grid-template-columns: 1fr;
    }

    .control-panel.is-collapsed {
        padding: 10px 12px;
        gap: 5px;
    }

    .control-panel.is-collapsed .panel-section {
        padding: 0 7px;
    }

    .control-panel.is-collapsed .selection-panel {
        padding-left: 0;
        padding-right: 6px;
    }

    .control-panel.is-collapsed .sidebar-toggle {
        flex-basis: 26px;
        width: 26px;
        height: 38px;
        min-height: 38px;
    }

    .control-panel.is-collapsed .tower-list {
        gap: 8px;
    }

    .control-panel.is-collapsed .sidebar-toggle,
    .control-panel.is-collapsed .tower-card,
    .control-panel.is-collapsed .button-start-wave,
    .control-panel.is-collapsed .button-upgrade,
    .control-panel.is-collapsed .button-sell {
        flex-basis: 38px;
        width: 38px;
        height: 38px;
        min-height: 38px;
        border-radius: 12px;
    }

    .control-panel.is-collapsed .upgrade-panel {
        gap: 8px;
        padding-right: 0;
    }

    .control-panel.is-collapsed .tower-token {
        width: 28px;
        height: 28px;
        border-radius: 10px;
    }

    .game-app.board-focus-active .board-focus-hud {
        right: auto;
        left: 50%;
        width: calc(100vw - 28px);
        max-width: calc(100vw - 28px);
        gap: 8px;
    }

    .board-focus-stat {
        gap: 4px;
        padding: 8px 10px;
        border-radius: 15px;
    }

    .board-focus-stat span {
        width: 22px;
        height: 22px;
    }

    .board-focus-stat strong {
        font-size: 1rem;
    }

    .hud {
        gap: 8px;
    }

    .hud-card strong {
        font-size: 1.1rem;
    }

    .tower-card {
        grid-template-columns: 34px 1fr;
        padding: 10px;
    }

    .tower-token {
        width: 34px;
        height: 34px;
        border-radius: 12px;
    }
}

@media (max-width: 400px) {
    .game-app.board-focus-active .board-card {
        --board-focus-stat-height: 54px;
    }

    .card-choice-panel {
        padding: 32px 16px;
    }

    .card-choice-header .eyebrow {
        padding: 6px 12px;
    }

    .card-choice-header .eyebrow::before,
    .card-choice-header .eyebrow::after {
        display: none;
    }

    .game-app.board-focus-active .board-focus-hud {
        right: auto;
        left: 50%;
        width: calc(100vw - 20px);
        max-width: calc(100vw - 20px);
        gap: 6px;
    }

    .board-focus-stat {
        gap: 4px;
        padding: 7px 8px;
    }

    .board-focus-stat span {
        width: 21px;
        height: 21px;
    }

    .board-focus-stat svg.lucide,
    .board-focus-stat [data-lucide] {
        width: 12px;
        height: 12px;
    }

    .board-focus-stat strong {
        font-size: 0.96rem;
    }

    .control-panel.is-collapsed {
        padding-left: 8px;
        padding-right: 8px;
        gap: 4px;
    }

    .control-panel.is-collapsed .panel-section {
        padding: 0 5px;
        border-right: 0;
    }

    .control-panel.is-collapsed .selection-panel {
        padding-left: 0;
        padding-right: 2px;
    }

    .control-panel.is-collapsed .sidebar-toggle {
        flex-basis: 34px;
        width: 34px;
    }
}