/* ═══════════════════════════════════════════════════════════
   SIGNAL DEFENSE — GAME GUIDE STYLES
   Extends the Arcade portal design system
   ═══════════════════════════════════════════════════════════ */

:root {
    /* Portal design system */
    --bg: #0a0a1a;
    --surface: #12122a;
    --surface-2: #1a1a3a;
    --surface-3: #222244;
    --border: rgba(255,255,255,0.06);
    --border-2: rgba(255,255,255,0.12);
    --text: #e8e8f0;
    --text-muted: #8888aa;
    --text-dim: #555577;
    --accent: #7c5cfc;
    --accent-glow: rgba(124, 92, 252, 0.15);
    --cyan: #00e5ff;
    --green: #4ade80;
    --orange: #f59e0b;
    --red: #ff4444;
    --radius: 12px;

    /* Damage type colors */
    --physical: #ff8844;
    --energy: #44aaff;
    --explosive: #ffaa44;
    --plasma: #cc44ff;

    /* Hero colors */
    --hero-sarge: #ff6644;
    --hero-ghost: #8866ff;
    --hero-ember: #ff8800;
    --hero-frost: #44ccff;
    --hero-sparky: #ffee44;
    --hero-doc: #44ff88;

    /* Tech tree branch colors */
    --branch-ballistic: #ff4444;
    --branch-energy: #aa44ff;
    --branch-defense: #44aa44;
    --branch-tactics: #ffaa44;
    --branch-support: #44ddaa;
    --branch-experimental: #ffdd44;

    --sidebar-width: 260px;
    --header-height: 56px;
}

/* ═══ RESET ═══ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ═══ LAYOUT ═══ */
.guide-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(10,10,26,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 1000;
}

.guide-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.guide-back {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    transition: color 0.2s;
}
.guide-back:hover { color: var(--text); text-decoration: none; }

.guide-title {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

/* Sidebar */
.guide-sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 20px 0;
    z-index: 100;
    scrollbar-width: thin;
    scrollbar-color: var(--surface-3) transparent;
}

.sidebar-search {
    padding: 0 16px 16px;
}
.sidebar-search input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg);
    border: 1px solid var(--border-2);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.8rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}
.sidebar-search input::placeholder { color: var(--text-dim); }
.sidebar-search input:focus { border-color: var(--accent); }

.sidebar-nav { list-style: none; }

.sidebar-section {
    padding: 0 12px;
    margin-bottom: 4px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 500;
    transition: all 0.15s;
    cursor: pointer;
}
.sidebar-link:hover {
    background: var(--surface-2);
    color: var(--text);
    text-decoration: none;
}
.sidebar-link.active {
    background: var(--accent-glow);
    color: var(--accent);
    font-weight: 600;
}

.sidebar-link .nav-icon {
    font-size: 1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-sub {
    list-style: none;
    padding-left: 40px;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}
.sidebar-section.expanded .sidebar-sub {
    max-height: 800px;
}

.sidebar-sub-link {
    display: block;
    padding: 4px 12px;
    border-left: 2px solid var(--border);
    color: var(--text-dim);
    font-size: 0.75rem;
    transition: all 0.15s;
}
.sidebar-sub-link:hover {
    color: var(--text-muted);
    border-color: var(--accent);
    text-decoration: none;
}
.sidebar-sub-link.active {
    color: var(--accent);
    border-color: var(--accent);
}

/* Main content */
.guide-content {
    margin-left: var(--sidebar-width);
    padding: calc(var(--header-height) + 32px) 48px 80px;
    max-width: calc(var(--sidebar-width) + 900px);
}

/* ═══ SECTION HEADERS ═══ */
.section-label {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    margin-top: 48px;
}
section:first-of-type .section-label { margin-top: 0; }

.section-label-line {
    flex: 1;
    height: 1px;
    background: var(--border);
}

.section-label-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    white-space: nowrap;
}

.section-intro {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 640px;
}

/* ═══ CARDS (base) ═══ */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: transform 0.2s, border-color 0.2s;
}
.card:hover {
    transform: translateY(-2px);
    border-color: var(--border-2);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.card-grid-wide {
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
}

/* ═══ DAMAGE BADGES ═══ */
.dmg-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: 6px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.dmg-badge--physical { background: rgba(255,136,68,0.15); color: var(--physical); }
.dmg-badge--energy   { background: rgba(68,170,255,0.15); color: var(--energy); }
.dmg-badge--explosive { background: rgba(255,170,68,0.15); color: var(--explosive); }
.dmg-badge--plasma   { background: rgba(204,68,255,0.15); color: var(--plasma); }

/* ═══ TAG BADGES ═══ */
.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: rgba(255,255,255,0.06);
    color: var(--text-muted);
}
.tag--flying   { background: rgba(255,136,255,0.15); color: #ff88ff; }
.tag--stealth  { background: rgba(136,68,170,0.15);  color: #aa66cc; }
.tag--healer   { background: rgba(68,255,68,0.15);   color: #44ff44; }
.tag--splitter { background: rgba(255,136,51,0.15);   color: #ff8833; }
.tag--teleport { background: rgba(136,68,255,0.15);   color: #8844ff; }
.tag--spawner  { background: rgba(187,102,68,0.15);   color: #bb6644; }
.tag--slow-immune { background: rgba(170,102,34,0.15); color: #aa6622; }
.tag--boss     { background: rgba(255,68,68,0.15);    color: var(--red); }
.tag--matryoshka { background: rgba(204,34,68,0.15);  color: #cc2244; }
.tag--aura     { background: rgba(255,136,0,0.15);    color: #ff8800; }
.tag--stage3   { background: rgba(255,204,0,0.2);     color: #ffcc00; }

/* ═══ TOWER CARDS ═══ */
.tower-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.tower-card-name {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.tower-card-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.keybind {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    padding: 0 6px;
    background: var(--bg);
    border: 1px solid var(--border-2);
    border-radius: 5px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
}

.tower-card-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

/* ═══ STAT ROWS ═══ */
.stat-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat-label {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

/* ═══ COLLAPSIBLE ═══ */
.collapsible-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 0;
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-dim);
    background: none;
    border: none;
    font-family: inherit;
    transition: color 0.2s;
    user-select: none;
}
.collapsible-toggle:hover { color: var(--text-muted); }

.collapsible-toggle .chevron {
    transition: transform 0.2s;
    font-size: 0.6rem;
}
.collapsible.open .collapsible-toggle .chevron {
    transform: rotate(90deg);
}

.collapsible-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.collapsible.open .collapsible-body {
    max-height: 600px;
}

/* ═══ STAT TABLES ═══ */
.stat-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
    margin: 8px 0;
}

.stat-table th {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
    padding: 6px 10px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.stat-table td {
    padding: 6px 10px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

.stat-table tr:last-child td { border-bottom: none; }
.stat-table .tier-label { color: var(--text-dim); font-weight: 600; }

/* ═══ HERO CARDS ═══ */
.hero-card {
    border-left: 3px solid var(--accent);
}

.hero-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.hero-card-title {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.hero-card-role {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.hero-card-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.hero-ability {
    background: var(--bg);
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 10px;
}

.hero-ability-name {
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.hero-ability-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.cooldown-chip {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    padding: 2px 6px;
    background: rgba(255,255,255,0.06);
    border-radius: 4px;
    color: var(--text-dim);
    margin-left: 8px;
}

/* ═══ ENEMY CARDS ═══ */
.enemy-card {
    border-left: 3px solid var(--text-dim);
}

.enemy-card-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.enemy-weakness {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}
.weakness-label {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
}

/* ═══ FUSION MATRIX ═══ */
.fusion-matrix-container {
    overflow-x: auto;
    margin-bottom: 40px;
    -webkit-overflow-scrolling: touch;
}

.fusion-matrix {
    display: grid;
    grid-template-columns: 100px repeat(8, 1fr);
    gap: 2px;
    min-width: 700px;
    font-size: 0.65rem;
}

.fusion-matrix-header {
    background: var(--surface-2);
    padding: 8px 6px;
    text-align: center;
    font-weight: 700;
    font-size: 0.6rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
    border-radius: 4px;
}

.fusion-matrix-row-header {
    background: var(--surface-2);
    padding: 8px 10px;
    font-weight: 700;
    font-size: 0.65rem;
    color: var(--text-muted);
    border-radius: 4px;
    display: flex;
    align-items: center;
}

.fusion-matrix-cell {
    background: var(--surface);
    padding: 6px 4px;
    text-align: center;
    border-radius: 4px;
    color: var(--text-dim);
    font-size: 0.6rem;
    transition: all 0.15s;
    cursor: default;
    line-height: 1.3;
}
.fusion-matrix-cell:hover {
    background: var(--surface-2);
    color: var(--text);
}
.fusion-matrix-cell a {
    color: inherit;
    text-decoration: none;
}
.fusion-matrix-cell a:hover {
    color: var(--accent);
    text-decoration: none;
}
.fusion-matrix-cell--empty {
    background: var(--bg);
    cursor: default;
}
.fusion-matrix-cell--empty:hover {
    background: var(--bg);
    color: var(--text-dim);
}

/* ═══ HEX TECH TREE ═══ */
#tech-hex-tree {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 8px 0;
}

.tech-hex-container {
    position: relative;
    min-width: 1100px;
    min-height: 680px;
    margin: 0 auto;
}

.tech-hex-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.tech-hex-node {
    position: absolute;
    width: 74px;
    height: 64px;
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    z-index: 1;
    transition: transform 0.15s, filter 0.15s;
    padding: 4px 10px;
    background: var(--surface-2);
    border: none;
    touch-action: pan-x pan-y;
}

.tech-hex-node:hover {
    transform: scale(1.12);
    z-index: 5;
    filter: brightness(1.3);
}

.tech-hex-node--capstone {
    width: 82px;
    height: 72px;
}

/* Inner hex for border effect */
.tech-hex-inner {
    position: absolute;
    inset: 2px;
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    background: var(--surface);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
}

.tech-hex-node--capstone .tech-hex-inner {
    inset: 3px;
}

.tech-hex-name {
    font-size: 0.5rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.15;
    letter-spacing: -0.01em;
    max-width: 56px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tech-hex-node--capstone .tech-hex-name {
    font-size: 0.55rem;
    max-width: 62px;
}

.tech-hex-cost {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.5rem;
    font-weight: 700;
    color: var(--orange);
    margin-top: 1px;
}

.tech-hex-hub {
    position: absolute;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: radial-gradient(circle at center, rgba(68,136,255,0.25), var(--surface));
    border: 2px solid #4488ff;
    box-shadow: 0 0 20px rgba(68,136,255,0.4), inset 0 0 12px rgba(68,136,255,0.15);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2;
    text-align: center;
}

.tech-hex-hub-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.5rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #88bbff;
    line-height: 1.1;
}

.tech-hex-hub-sub {
    font-size: 0.4rem;
    color: var(--text-dim);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.tech-hex-tooltip {
    position: fixed;
    z-index: 2000;
    background: rgba(12,12,30,0.96);
    border: 1px solid var(--border-2);
    border-radius: 10px;
    padding: 12px 16px;
    max-width: 260px;
    pointer-events: none;
    backdrop-filter: blur(8px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    opacity: 0;
    transition: opacity 0.15s;
}

.tech-hex-tooltip.visible {
    opacity: 1;
}

.tech-hex-tooltip-name {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.tech-hex-tooltip-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.tech-hex-tooltip-req {
    font-size: 0.65rem;
    color: var(--text-dim);
    font-style: italic;
    margin-bottom: 4px;
}

.tech-hex-tooltip-cost {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--orange);
}

.tech-hex-branch-label {
    position: absolute;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 3;
    white-space: nowrap;
    opacity: 0.7;
}

@media (max-width: 900px) {
    #tech-hex-tree {
        touch-action: pan-x pan-y pinch-zoom;
    }
}

/* ═══ CALLOUTS ═══ */
.callout {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.85rem;
    line-height: 1.6;
}

.callout-title {
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.callout--tip {
    background: rgba(74,222,128,0.06);
    border-left: 3px solid var(--green);
}
.callout--tip .callout-title { color: var(--green); }

.callout--warning {
    background: rgba(245,158,11,0.06);
    border-left: 3px solid var(--orange);
}
.callout--warning .callout-title { color: var(--orange); }

.callout--info {
    background: rgba(124,92,252,0.06);
    border-left: 3px solid var(--accent);
}
.callout--info .callout-title { color: var(--accent); }

/* ═══ OVERVIEW FLOW ═══ */
.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.flow-step {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 16px;
    text-align: center;
    position: relative;
}

.flow-step-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--accent);
    opacity: 0.3;
    margin-bottom: 8px;
}

.flow-step-title {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.flow-step-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Currency cards */
.currency-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 32px;
}

.currency-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
}

.currency-icon {
    font-size: 1.5rem;
    width: 36px;
    text-align: center;
}

.currency-name {
    font-size: 0.8rem;
    font-weight: 700;
}

.currency-desc {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Quick tips */
.quick-tips {
    list-style: none;
    margin-bottom: 32px;
}

.quick-tips li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}
.quick-tips li:last-child { border-bottom: none; }
.quick-tips li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
}

/* ═══ DAMAGE TYPE TABLE ═══ */
.dmg-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 32px;
}

.dmg-table th, .dmg-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
}

.dmg-table th {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.dmg-table td { color: var(--text-muted); }

.strong { color: var(--green); font-weight: 600; }
.weak { color: var(--red); font-weight: 600; }

/* ═══ DISASTER CARDS ═══ */
.disaster-icon {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.disaster-name {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.disaster-effect {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.disaster-tip {
    font-size: 0.72rem;
    color: var(--text-dim);
    font-style: italic;
}

/* ═══ CONTROLS ═══ */
.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.control-group-title {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 12px;
}

.control-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}
.control-item:last-child { border-bottom: none; }

kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 26px;
    height: 24px;
    padding: 0 8px;
    background: var(--bg);
    border: 1px solid var(--border-2);
    border-bottom-width: 2px;
    border-radius: 5px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-muted);
}

/* ═══ DIFFICULTY TABLE ═══ */
.diff-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 32px;
    font-size: 0.78rem;
}

.diff-table th {
    padding: 10px 12px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.diff-table td {
    padding: 8px 12px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
}

/* ═══ ADVANCED CONTENT (always visible) ═══ */
.advanced { display: block; }
.advanced-inline { display: inline; }
tr.advanced { display: table-row; }

/* ═══ MOBILE MENU ═══ */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 4px;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 900px) {
    .guide-sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        width: 280px;
    }
    .guide-sidebar.open {
        transform: translateX(0);
    }

    .guide-content {
        margin-left: 0;
        padding: calc(var(--header-height) + 20px) 20px 60px;
    }

    .menu-toggle { display: block; }

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

    .flow-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .fusion-matrix {
        font-size: 0.55rem;
    }
    .fusion-matrix-header,
    .fusion-matrix-row-header {
        font-size: 0.5rem;
        padding: 6px 4px;
    }

}

@media (max-width: 480px) {
    .flow-steps {
        grid-template-columns: 1fr;
    }
    .currency-row {
        grid-template-columns: 1fr;
    }
}

/* ═══ OVERLAY for mobile sidebar ═══ */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
}
.sidebar-overlay.visible { display: block; }

/* ═══ SECTION DIVIDER ═══ */
.section-divider {
    height: 1px;
    background: var(--border);
    margin: 48px 0;
}

/* ═══ Talent tree compact ═══ */
.talent-tree {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 8px;
}
.talent-level {
    display: grid;
    grid-template-columns: 36px 1fr 1fr;
    gap: 6px;
    align-items: stretch;
}
.talent-level-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    justify-content: center;
}
.talent-option {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.7rem;
}
.talent-option-name {
    font-weight: 700;
    color: var(--text);
    font-size: 0.7rem;
}
.talent-option-desc {
    color: var(--text-dim);
    font-size: 0.62rem;
}

/* Fusion recipe badge */
.fusion-recipe {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.recipe-part {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg);
    padding: 2px 8px;
    border-radius: 4px;
}
.recipe-plus {
    font-size: 0.7rem;
    color: var(--text-dim);
}

/* ═══ SPRITE CANVASES ═══ */
.sprite {
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

.tower-card-sprite {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.enemy-card-sprite {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.hero-card-sprite {
    width: 64px;
    height: 64px;
    border-radius: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.fusion-card-sprite {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--bg);
    border: 1px solid var(--border-2);
    flex-shrink: 0;
}

/* Terrain tile previews in table */
canvas[data-sprite^="terrain-"] {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    border: 1px solid var(--border);
    image-rendering: pixelated;
    vertical-align: middle;
}

.card-with-sprite {
    display: flex;
    gap: 16px;
}

.card-with-sprite .card-body {
    flex: 1;
    min-width: 0;
}

/* ═══ SCROLL PROGRESS BAR ═══ */
.scroll-progress {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: 2px;
    background: transparent;
    z-index: 999;
}
.scroll-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--cyan));
    transition: width 0.1s;
}

/* ═══ BACK TO TOP ═══ */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
    background: var(--surface-2);
    border: 1px solid var(--border-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s, background 0.2s;
    z-index: 900;
    text-decoration: none;
}
.back-to-top:hover {
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    transform: translateY(-2px);
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

/* ═══ SECTION QUICK NAV (floating) ═══ */
.section-quick-nav {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 800;
}
.section-quick-nav a {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--surface-3);
    border: 1px solid var(--border-2);
    transition: all 0.2s;
}
.section-quick-nav a:hover {
    background: var(--text-muted);
    transform: scale(1.5);
}
.section-quick-nav a.active {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.3);
}

@media (max-width: 900px) {
    .section-quick-nav { display: none; }
    .back-to-top { bottom: 16px; right: 16px; }
    .card-with-sprite { flex-direction: column; gap: 12px; }
    .tower-card-sprite, .enemy-card-sprite { align-self: flex-start; }
}

/* ═══ FILTER BAR ═══ */
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 6px 16px;
    border: 1px solid var(--border-2);
    border-radius: 20px;
    background: var(--surface);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
}
.filter-btn:hover {
    border-color: var(--filter-color, var(--accent));
    color: var(--filter-color, var(--accent));
    background: rgba(255,255,255,0.03);
}
.filter-btn.active {
    border-color: var(--filter-color, var(--accent));
    color: var(--bg);
    background: var(--filter-color, var(--accent));
}

/* ═══ DPS ROW ═══ */
.tower-dps-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 8px 0 4px;
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-muted);
    flex-wrap: wrap;
}
.dps-label {
    font-weight: 700;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.dps-value {
    font-weight: 700;
    color: var(--green);
    font-size: 0.8rem;
}
.dps-max {
    color: #ffdd44;
    font-size: 0.85rem;
}
.dps-note {
    color: var(--text-dim);
    font-size: 0.7rem;
}
.dps-cell {
    color: var(--green);
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
}

/* ═══ CARD HIDDEN STATE (for filters) ═══ */
.card.filter-hidden {
    display: none !important;
}

/* ═══ SORT BUTTON ═══ */
.sort-btn {
    padding: 6px 16px;
    border: 1px solid var(--border-2);
    border-radius: 20px;
    background: var(--surface);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: auto;
}
.sort-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(255,255,255,0.03);
}
.sort-btn.active {
    border-color: var(--accent);
    color: var(--bg);
    background: var(--accent);
}

/* ═══ FUSION PATHS ═══ */
.fusion-paths-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 40px;
}

.fusion-path {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    flex-wrap: wrap;
    transition: border-color 0.2s;
}
.fusion-path:hover {
    border-color: var(--border-2);
}

.fusion-path-node {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.72rem;
    font-weight: 600;
    white-space: nowrap;
}

.fusion-path-node--base {
    background: rgba(255,255,255,0.06);
    color: var(--text-muted);
}

.fusion-path-node--l2 {
    background: rgba(124, 92, 252, 0.12);
    color: var(--accent);
    border: 1px solid rgba(124, 92, 252, 0.25);
}

.fusion-path-node--l3 {
    background: rgba(255, 204, 0, 0.15);
    color: #ffcc00;
    border: 1px solid rgba(255, 204, 0, 0.3);
    font-weight: 800;
    font-size: 0.75rem;
}

.fusion-path-arrow {
    color: var(--text-dim);
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

@media (max-width: 900px) {
    .fusion-paths-grid {
        grid-template-columns: 1fr;
    }
    .fusion-path {
        padding: 10px 12px;
        gap: 4px;
    }
    .fusion-path-node {
        font-size: 0.65rem;
        padding: 3px 7px;
    }
}

/* ═══ MOBILE TAB BAR ═══ */
.mobile-tab-bar {
    display: none;
    position: sticky;
    top: 56px;
    z-index: 90;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    white-space: nowrap;
    padding: 0 12px;
}
.mobile-tab-bar::-webkit-scrollbar { display: none; }
.mobile-tab {
    display: inline-block;
    padding: 10px 14px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}
.mobile-tab:hover, .mobile-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ═══ HERO ACCORDION (Mobile) ═══ */
.accordion-chevron {
    display: none;
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: transform 0.3s;
    flex-shrink: 0;
    margin-left: auto;
}

@media (max-width: 900px) {
    /* Show mobile tab bar */
    .mobile-tab-bar { display: block; }

    /* Compact card layouts */
    .card-with-sprite { flex-direction: row; gap: 10px; }
    .card-with-sprite .card-body { flex: 1; min-width: 0; }
    .tower-card-sprite, .enemy-card-sprite, .fusion-card-sprite {
        width: 36px; height: 36px;
        align-self: flex-start;
    }

    /* Two-column enemy grid */
    #enemies .card-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px;
    }
    #enemies .card {
        padding: 10px 12px;
    }
    #enemies .tower-card-desc {
        display: none;
    }
    #enemies .stat-row {
        font-size: 0.65rem;
        gap: 4px;
    }

    /* Two-column tower grid */
    #towers .card-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px;
    }
    #towers .card {
        padding: 10px 12px;
    }
    #towers .tower-card-desc {
        display: none;
    }

    /* Fusion cards compact */
    #fusions .card:not(.mobile-expanded) .tower-card-desc,
    #fusions .card:not(.mobile-expanded) .tower-dps-row,
    #fusions .card:not(.mobile-expanded) .collapsible {
        display: none;
    }

    /* Hero accordion */
    .accordion-chevron { display: block; }
    .hero-card-header {
        display: flex !important;
        align-items: center;
        cursor: pointer;
    }
    .hero-accordion-body {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    .hero-accordion-item.open .hero-accordion-body {
        max-height: 800px;
    }
    .hero-accordion-item.open .accordion-chevron {
        transform: rotate(45deg);
    }

    /* Tighter hero grid */
    #heroes .card-grid {
        gap: 8px !important;
    }
    #heroes .hero-card {
        padding: 12px;
    }
}

@media (max-width: 480px) {
    /* Single column for enemies on very small screens */
    #enemies .card-grid {
        grid-template-columns: 1fr !important;
    }
    #towers .card-grid {
        grid-template-columns: 1fr !important;
    }
}

/* ═══ HERO 2-COLUMN GRID ═══ */
.hero-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 16px;
}

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr !important;
    }
}

/* ═══ HERO TALENT TREES ═══ */
.hero-talents {
    margin-top: 16px;
    border-top: 1px solid var(--border);
    padding-top: 12px;
}

.hero-talents-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.talent-tier {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 6px;
    padding: 4px 0;
}

.talent-level {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 36px;
    padding-top: 2px;
    flex-shrink: 0;
}

.talent-choices {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 12px;
    flex: 1;
}

.talent-choice {
    font-size: 0.7rem;
    color: var(--text-2);
    line-height: 1.3;
}

.talent-choice b {
    color: var(--text);
    font-weight: 600;
}

@media (max-width: 900px) {
    .talent-choices {
        grid-template-columns: 1fr;
        gap: 2px;
    }
    .talent-tier {
        flex-direction: column;
        gap: 2px;
    }
    .talent-level {
        min-width: auto;
    }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }