/**
 * FastTrack Game - Responsive & 3D Immersive Enhancements
 * 
 * Device-adaptive layout, touch controls, and holodeck depth effects
 * Based on Dimensional Computing principles (φ, Fibonacci, 7-layers)
 * 
 * @version 2.0.0
 * @author ButterflyFX
 */

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
    /* Golden Ratio Scale */
    --phi: 1.618033988749895;
    
    /* Responsive spacing */
    --game-spacing: clamp(8px, 2vw, 20px);
    --panel-width: clamp(100px, 20vw, 180px);
    --button-size: clamp(36px, 8vw, 50px);
    --card-width: clamp(50px, 12vw, 80px);
    --card-height: clamp(70px, 16vw, 112px);
    
    /* UI panel dimensions */
    --ui-panel-width: clamp(120px, 18vw, 180px);
    --info-panel-width: clamp(150px, 25vw, 250px);
    
    /* Touch target sizes */
    --touch-target-min: 44px;
    
    /* Z-index layers */
    --z-board: 1;
    --z-pegs: 10;
    --z-ui-back: 100;
    --z-panels: 500;
    --z-cards: 1000;
    --z-modals: 5000;
    --z-overlays: 8000;
    --z-loading: 10000;
    
    /* Animation timings (Fibonacci) */
    --timing-fast: 89ms;
    --timing-normal: 144ms;
    --timing-smooth: 233ms;
    --timing-slow: 377ms;
    
    /* Depth layers for parallax */
    --depth-bg: 0.1;
    --depth-board: 0.5;
    --depth-ui: 1.0;
}

/* ============================================
   BASE RESPONSIVE RESETS
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    overflow: hidden;
    touch-action: manipulation;
    -webkit-overflow-scrolling: touch;
    height: 100%;
    height: 100dvh;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #0a0604;   /* Billiard room dark */
    display: flex;
    flex-direction: column;
    height: 100dvh;
}

/* iOS viewport fix */
@supports (-webkit-touch-callout: none) {
    body {
        height: -webkit-fill-available;
    }
}

/* ============================================
   GAME LAYOUT SHELL — Top bar / Canvas / Action bar
   ============================================ */
#game-top-bar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px 6px 12px;
    background: rgba(8, 5, 2, 0.92);
    border-bottom: 1px solid rgba(212, 175, 55, 0.25);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 10006;
    min-height: 56px;
    padding-top: calc(6px + env(safe-area-inset-top, 0));
}

#game-top-bar .gtb-player-dots {
    display: flex;
    gap: 6px;
    align-items: center;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
}
#game-top-bar .gtb-player-dots::-webkit-scrollbar { display: none; }

/* Compact dot for each player in the top bar */
.gtb-dot {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    border: 2px solid transparent;
    flex-shrink: 0;
    cursor: default;
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
}
.gtb-dot.current {
    border-color: #d4af37;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.6);
    transform: scale(1.15);
}
.gtb-dot .gtb-peg-badge {
    position: absolute;
    bottom: -3px;
    right: -3px;
    min-width: 14px;
    height: 14px;
    border-radius: 7px;
    background: rgba(0,0,0,0.85);
    color: #fff;
    font-size: 8px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 2px;
    border: 1px solid rgba(255,255,255,0.3);
}
.gtb-dot .gtb-tooltip {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(8,5,2,0.96);
    border: 1px solid rgba(212,175,55,0.4);
    border-radius: 8px;
    padding: 5px 10px;
    white-space: nowrap;
    font-size: 11px;
    color: #f0e8d8;
    pointer-events: none;
    opacity: 0;
    z-index: 10010;
    transition: opacity 0.15s;
}
.gtb-dot:hover .gtb-tooltip { opacity: 1; }

/* Deck + drawn card section in the top bar */
#gtb-deck-section {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
#gtb-deck-btn {
    width: 38px;
    height: 52px;
    background: linear-gradient(135deg, #2980b9, #1a5276);
    border-radius: 5px;
    border: 2px solid #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    flex-shrink: 0;
    position: relative;
}
#gtb-deck-btn::after {
    content: '';
    position: absolute;
    top: -2px; left: -2px; right: 2px; bottom: 2px;
    background: linear-gradient(135deg, #3498db, #2471a3);
    border-radius: 5px;
    border: 1px solid rgba(255,255,255,0.25);
    z-index: -1;
}
#gtb-deck-btn.draw-ready {
    animation: deckPulseTop 1.2s ease-in-out infinite;
    box-shadow: 0 0 18px rgba(255, 215, 0, 0.6);
}
@keyframes deckPulseTop {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}
#gtb-drawn-card {
    width: 38px;
    height: 52px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 5px;
    border: 2px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 900;
    color: #c0392b;
    flex-shrink: 0;
}
#gtb-drawn-card.empty {
    background: rgba(255,255,255,0.07);
    border: 2px dashed rgba(255,255,255,0.25);
    color: rgba(255,255,255,0.25);
    font-size: 12px;
}
#gtb-drawn-card.black { color: #2c3e50; }

/* The 3D canvas container */
#container {
    flex: 1;
    min-height: 0;           /* Crucial: allow flex child to shrink below content size */
    width: 100%;
    position: relative;
    z-index: var(--z-board);
}

/* Bottom action bar — shows move buttons */
#game-action-bar {
    flex-shrink: 0;
    display: none;           /* Hidden until there are move choices to show */
    flex-direction: column;
    gap: 0;
    background: rgba(8, 5, 2, 0.95);
    border-top: 1px solid rgba(212, 175, 55, 0.25);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 8px 10px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0));
    z-index: 10006;
    max-height: 45vh;
    overflow-y: auto;
    scrollbar-width: thin;
}
#game-action-bar.visible {
    display: flex;
}
#gab-title {
    color: rgba(240, 232, 216, 0.7);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
    text-align: center;
}
#gab-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
}
.gab-btn {
    padding: 9px 14px;
    border-radius: 8px;
    border: 2px solid rgba(212, 175, 55, 0.5);
    background: rgba(30, 20, 10, 0.85);
    color: #f0e8d8;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 7px;
    min-height: 44px;
}
.gab-btn:hover, .gab-btn:focus {
    border-color: #d4af37;
    background: rgba(212, 175, 55, 0.15);
    transform: translateY(-1px);
}
.gab-btn:active { transform: translateY(0); }
.gab-btn.recommended {
    border-color: #4ade80;
    box-shadow: 0 0 8px rgba(74,222,128,0.3);
}
.gab-btn .gab-icon { font-size: 16px; flex-shrink: 0; }
.gab-btn .gab-label { flex: 1; line-height: 1.3; }
.gab-btn .gab-badge {
    font-size: 9px;
    padding: 2px 5px;
    border-radius: 4px;
    background: rgba(212,175,55,0.3);
    color: #d4af37;
    white-space: nowrap;
    flex-shrink: 0;
}
.gab-btn.recommended .gab-badge {
    background: rgba(74,222,128,0.3);
    color: #4ade80;
}

/* FastTrack status-losing move buttons */
.gab-btn.ft-loss-move {
    border-color: rgba(255, 160, 0, 0.45);
    background: rgba(40, 20, 5, 0.85);
    opacity: 0.85;
}
.gab-btn.ft-loss-move:hover, .gab-btn.ft-loss-move:focus {
    border-color: #ffa000;
    background: rgba(255, 160, 0, 0.12);
}
.gab-badge.ft-loss-badge {
    background: rgba(255, 160, 0, 0.3);
    color: #ffa000;
}
/* Divider between FT-preserving and FT-losing moves */
.gab-ft-divider {
    text-align: center;
    font-size: 10px;
    color: rgba(255, 160, 0, 0.55);
    letter-spacing: 0.5px;
    padding: 2px 0;
    flex-shrink: 0;
}

/* 7-card split UI */
#gab-split-container {
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 0 4px;
}
#gab-split-container.visible { display: flex; }
.gab-split-header {
    color: #d4af37;
    font-size: 12px;
    font-weight: 600;
    text-align: center;
}
.gab-split-step {
    background: rgba(212,175,55,0.08);
    border: 1px solid rgba(212,175,55,0.25);
    border-radius: 8px;
    padding: 8px 10px;
}
.gab-split-step-title {
    color: rgba(240,232,216,0.6);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 5px;
}
.gab-split-step-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

/* ============================================
   LEGACY #ui PANEL - REMOVED
   Settings now handled by GameUIMinimal menu
   ============================================ */

/* ============================================
   INFO PANEL (Bottom Left)
   ============================================ */
#info {
    position: fixed;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 10px;
    color: #fff;
    z-index: var(--z-ui-back);
    font-size: 12px;
}

@media (min-width: 769px) {
    #info {
        bottom: 20px;
        left: 20px;
        padding: 15px;
    }
}

@media (max-width: 768px) {
    #info {
        display: none; /* Hide on mobile - free up space */
    }
}

/* ============================================
   PLAYER PANELS — legacy element, now hidden
   (replaced by #game-top-bar dots)
   ============================================ */
#player-panels {
    display: none !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

/* Desktop - full panels */
@media (min-width: 1025px) {
    #player-panels {
        display: flex !important;
        justify-content: center !important;
        gap: 15px !important;
        flex-wrap: wrap !important;
    }
    
    .player-panel {
        padding: 12px 18px !important;
        min-width: 140px;
    }
}

/* Tablet - compact panels */
@media (min-width: 769px) and (max-width: 1024px) {
    #player-panels {
        display: flex !important;
        justify-content: center !important;
        gap: 10px !important;
        flex-wrap: wrap !important;
    }
    
    .player-panel {
        padding: 8px 14px !important;
        min-width: 110px;
        font-size: 12px !important;
    }
}

/* Mobile - compact player panels (horizontal strip below header) */
@media (max-width: 768px) {
    #player-panels {
        display: flex !important;
        justify-content: center !important;
        gap: 6px !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: none !important;
        -ms-overflow-style: none !important;
        top: 60px !important;
        padding: 6px 8px !important;
        background: linear-gradient(180deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0) 100%) !important;
    }
    
    #player-panels::-webkit-scrollbar {
        display: none;
    }
    
    .player-panel {
        padding: 5px 8px !important;
        min-width: 70px !important;
        max-width: 110px !important;
        flex: 0 0 auto !important;
        font-size: 10px !important;
        border-radius: 8px !important;
        background: rgba(0,0,0,0.6) !important;
        backdrop-filter: blur(8px) !important;
        -webkit-backdrop-filter: blur(8px) !important;
    }
    
    .player-panel .player-name {
        font-size: 10px !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        max-width: 70px !important;
    }
    
    .player-panel .peg-indicator {
        width: 14px !important;
        height: 14px !important;
    }
    
    .player-panel .peg-count,
    .player-panel .safe-count {
        font-size: 9px !important;
    }
    
    /* Smaller AI badge on mobile */
    .ai-badge {
        font-size: 7px !important;
        padding: 1px 3px !important;
    }
    
    /* Current turn panel stands out */
    .player-panel.current-turn {
        transform: scale(1.08) !important;
        min-width: 80px !important;
        z-index: 2;
    }
}

/* Current turn indicator - works on all sizes */
.player-panel.current-turn {
    box-shadow: 0 0 20px 5px rgba(74, 222, 128, 0.6) !important;
    transform: scale(1.05);
    border: 2px solid #4ade80 !important;
    animation: turnPulse 1.5s ease-in-out infinite;
}

@keyframes turnPulse {
    0%, 100% { box-shadow: 0 0 20px 5px rgba(74, 222, 128, 0.4); }
    50% { box-shadow: 0 0 30px 8px rgba(74, 222, 128, 0.7); }
}

/* ============================================
   CARD CONTAINER — HIDDEN (using compact panel deck)
   ============================================ */
#card-container,
#card-container-placeholder,
.card-ui-container {
    display: none !important;
    visibility: hidden !important;
    pointer-events: none !important;
    width: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
}

/* Desktop cards - old card UI hidden, no styles needed */

/* Card holodeck effect */
.game-card,
.card-container .card {
    transform-style: preserve-3d;
    transition: transform var(--timing-smooth);
    cursor: pointer;
}

@media (hover: hover) and (pointer: fine) {
    .game-card:hover,
    .card-container .card:hover {
        transform: translateY(-10px) rotateX(5deg) scale(1.1);
        box-shadow: 
            0 15px 30px rgba(0, 0, 0, 0.5),
            0 0 30px rgba(136, 85, 255, 0.4);
    }
}

@media (hover: none) {
    .game-card:active,
    .card-container .card:active {
        transform: scale(0.95);
    }
}

/* ============================================
   START GAME SCREEN (Responsive)
   ============================================ */
#start-game-screen {
    padding: var(--game-spacing);
    padding-top: calc(20px + env(safe-area-inset-top, 0));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

#start-game-screen h1 {
    font-size: clamp(28px, 8vw, 48px);
    text-align: center;
}

#start-game-screen .subtitle {
    font-size: clamp(14px, 3vw, 18px);
}

.player-setup {
    padding: clamp(15px, 4vw, 30px) clamp(20px, 5vw, 50px);
    max-width: 600px;
    margin: 0 auto 20px;
}

.player-list {
    display: flex;
    gap: clamp(10px, 3vw, 20px);
    justify-content: center;
    flex-wrap: wrap;
}

.player-card {
    padding: clamp(10px, 2vw, 15px) clamp(15px, 3vw, 25px);
    min-width: clamp(90px, 20vw, 120px);
}

.player-card .name {
    font-size: clamp(12px, 2.5vw, 16px);
}

.player-card .type {
    font-size: clamp(10px, 2vw, 12px);
}

#start-btn {
    padding: clamp(12px, 3vw, 20px) clamp(30px, 8vw, 60px);
    font-size: clamp(16px, 4vw, 24px);
    min-height: var(--touch-target-min);
}

/* ============================================
   MODALS & OVERLAYS (Responsive)
   ============================================ */
.ai-thinking,
#turn-action-banner,
#bot-alert,
.split-move-indicator {
    padding: clamp(15px, 4vw, 30px) clamp(25px, 6vw, 50px);
    border-radius: clamp(10px, 2vw, 20px);
    font-size: clamp(14px, 3vw, 18px);
    max-width: calc(100vw - 40px);
}

#pause-overlay {
    padding: var(--game-spacing);
}

#pause-overlay .pause-title {
    font-size: clamp(28px, 8vw, 48px);
}

#pause-overlay .pause-timer {
    font-size: clamp(40px, 12vw, 72px);
}

#pause-overlay .resume-btn {
    padding: clamp(10px, 3vw, 15px) clamp(25px, 6vw, 40px);
    font-size: clamp(16px, 4vw, 24px);
    min-height: var(--touch-target-min);
}

/* Pause button - accessible on all devices */
#pause-btn {
    width: var(--button-size);
    height: var(--button-size);
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    font-size: clamp(16px, 4vw, 20px);
}

@media (max-width: 768px) {
    #pause-btn {
        bottom: 140px; /* Above rules button */
    }
    #rules-toggle-btn {
        bottom: 80px; /* Above mobile UI dock */
    }
    #camera-toggle-btn {
        bottom: 200px; /* Above pause button */
    }
    #exit-game-btn {
        bottom: 260px; /* Above camera button */
    }
}

/* TURN TIMER — REMOVED */

/* ============================================
   MOBILE TOUCH GESTURES OVERLAY
   ============================================ */
.touch-controls {
    display: none;
    position: fixed;
    bottom: 150px;
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-ui-back);
    gap: 15px;
}

@media (hover: none) and (pointer: coarse) {
    .touch-controls {
        display: flex;
    }
}

.touch-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--timing-fast);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.touch-btn:active {
    transform: scale(0.9);
    background: rgba(136, 85, 255, 0.5);
}

/* ============================================
   3D DEPTH ENHANCEMENTS
   ============================================ */

/* Board container depth effect */
/* NOTE: perspective and preserve-3d REMOVED — they break WebGL context creation
   in Three.js. The 3D rendering is done by WebGL, not CSS transforms. */
/*
#container {
    perspective: 2000px;
    transform-style: preserve-3d;
}
*/

/* Ambient glow behind board */
#container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80%;
    height: 80%;
    transform: translate(-50%, -50%);
    background: radial-gradient(
        ellipse at center,
        rgba(136, 85, 255, 0.15) 0%,
        rgba(64, 255, 255, 0.05) 40%,
        transparent 70%
    );
    pointer-events: none;
    z-index: -1;
}

/* ============================================
   LANDSCAPE ORIENTATION HANDLING
   ============================================ */
@media (max-height: 500px) and (orientation: landscape) {
    #player-panels {
        padding: 5px 10px !important;
    }
    
    .player-panel {
        padding: 4px 8px !important;
        min-width: 70px !important;
    }
    
    #card-container,
    .card-container {
        bottom: 60px !important;
    }
    
    .card-container .card,
    .game-card {
        width: 40px;
        height: 56px;
        font-size: 14px;
    }
}

/* ============================================
   HIGH DPI (Retina) ENHANCEMENTS
   ============================================ */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Sharper borders and shadows */
    .player-panel,
    .game-card {
        box-shadow: 
            0 0 0 0.5px rgba(255, 255, 255, 0.1),
            0 4px 20px rgba(0, 0, 0, 0.4);
    }
}

/* ============================================
   DARK MODE (System Preference)
   ============================================ */
@media (prefers-color-scheme: dark) {
    /* Already dark, but enhance contrast */
    #info,
    .player-panel {
        border-color: rgba(136, 85, 255, 0.4);
    }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .player-panel.current-turn {
        animation: none;
    }
}

/* ============================================
   YOUR TURN POPUP — Billiard-styled, 2s auto-dismiss
   ============================================ */
#your-turn-popup {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-12px);
    z-index: 20010;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px 12px 16px;
    background: linear-gradient(135deg, rgba(10,8,4,0.97) 0%, rgba(20,14,8,0.97) 100%);
    border: 1.5px solid rgba(212,175,55,0.6);
    border-radius: 12px;
    box-shadow:
        0 4px 24px rgba(0,0,0,0.7),
        0 0 0 1px rgba(212,175,55,0.15),
        inset 0 1px 0 rgba(212,175,55,0.12);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    pointer-events: auto;
    opacity: 0;
    transition: opacity 0.25s ease, transform 0.25s ease;
    white-space: nowrap;
}
#your-turn-popup.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
#your-turn-popup.fading {
    opacity: 0;
    transform: translateX(-50%) translateY(-8px);
    pointer-events: none;
}
.ytp-swatch {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.3);
    flex-shrink: 0;
    box-shadow: 0 0 8px currentColor;
}
.ytp-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.ytp-label {
    font-family: 'Segoe UI', system-ui, sans-serif;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(212,175,55,0.8);
}
.ytp-name {
    font-family: 'Segoe UI', system-ui, sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: #f0e8d8;
    line-height: 1.2;
}
.ytp-dismiss {
    background: none;
    border: none;
    color: rgba(240,232,216,0.45);
    font-size: 14px;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: color 0.15s, background 0.15s;
    flex-shrink: 0;
    margin-left: 4px;
}
.ytp-dismiss:hover {
    color: #f0e8d8;
    background: rgba(212,175,55,0.15);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    #container,
    #info,
    #player-panels,
    .card-container {
        display: none !important;
    }
}