/* ============================================
   THE AI VAULT: ESCAPE THE FUTURE
   Global Reset, Layout & Typography
   ============================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    min-height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg {
    display: block;
    max-width: 100%;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
    font-size: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    outline: none;
    transition: border-color var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
    border-color: var(--room-accent);
    box-shadow: 0 0 0 3px var(--room-accent-soft);
}

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

ul, ol {
    list-style: none;
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: var(--line-height-tight);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }

.font-mono { font-family: var(--font-mono); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--room-accent); }
.text-center { text-align: center; }

/* ---- Game Container ---- */
#game-container {
    width: 100vw;
    height: 100vh;
    position: relative;
    overflow: hidden;
    background: var(--room-bg-gradient);
    transition: background var(--transition-slow);
}

/* ---- Screen System ---- */
.screen {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
    padding: var(--spacing-xl);
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

.screen-content {
    max-width: var(--max-width);
    width: 100%;
}

/* ---- HUD (Heads-Up Display) ---- */
#hud {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: var(--z-hud);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

#hud.visible {
    opacity: 1;
    visibility: visible;
}

.hud-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.hud-timer {
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    color: var(--room-accent);
    letter-spacing: 0.1em;
}

.hud-room-name {
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.hud-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.hud-hints {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ---- Scrollable Content ---- */
.scrollable {
    overflow-y: auto;
    max-height: calc(100vh - var(--header-height) - var(--spacing-2xl));
    padding-top: var(--header-height);
}

.scrollable::-webkit-scrollbar {
    width: 6px;
}

.scrollable::-webkit-scrollbar-track {
    background: transparent;
}

.scrollable::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

.scrollable::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ---- Background Effects ---- */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(var(--room-accent-rgb), 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--room-accent-rgb), 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
}

.bg-particles {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    :root {
        --header-height: 50px;
        --spacing-xl: 1.25rem;
        --spacing-2xl: 2rem;
    }

    #hud {
        padding: 0 var(--spacing-md);
    }

    .hud-room-name {
        display: none;
    }

    .screen {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .hud-section {
        gap: var(--spacing-sm);
    }
}

/* ============================================
   Title Screen
   ============================================ */

.title-logo {
    margin-bottom: var(--spacing-2xl);
}

.title-main {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    letter-spacing: 0.15em;
    color: var(--color-text-primary);
    text-shadow: 0 0 40px rgba(59, 130, 246, 0.3);
    margin-bottom: var(--spacing-sm);
}

.title-sub {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    color: var(--color-accent-primary);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    font-weight: 400;
}

.title-tagline {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    max-width: 500px;
    margin: 0 auto var(--spacing-2xl);
    line-height: var(--line-height-relaxed);
}

.title-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

/* ============================================
   Room Select Grid
   ============================================ */

.room-select-header {
    margin-bottom: var(--spacing-2xl);
}

.room-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--spacing-lg);
    max-width: var(--max-width);
    margin: 0 auto;
}

.room-card {
    padding: var(--spacing-xl);
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-normal);
}

.room-card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.room-card-title {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.room-card-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

.room-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.room-card-puzzles {
    font-size: var(--font-size-xs);
}

/* ============================================
   End Screen
   ============================================ */

.end-header {
    margin-bottom: var(--spacing-2xl);
}

.end-header h1 {
    color: var(--color-success);
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-sm);
}

.end-stats {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.end-stats h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.end-stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.end-stat {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
}

.end-stat-value {
    font-family: var(--font-mono);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--room-accent, var(--color-accent-primary));
    margin-bottom: var(--spacing-xs);
}

.end-stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.room-times {
    margin-bottom: var(--spacing-xl);
}

.room-times h4 {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.room-time-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

.badges-display {
    margin-bottom: var(--spacing-xl);
}

.badges-display h4 {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--spacing-md);
}

.badge-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
}

.badge-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.badge-name {
    font-family: var(--font-display);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.badge-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .room-grid {
        grid-template-columns: 1fr;
    }

    .end-stat-grid {
        grid-template-columns: 1fr 1fr;
    }

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