/**
 * game.css — 15 Puzzle game-specific styles
 * Tile colors, layout, modals, responsive overrides
 * Supports grid sizes 3x3 to 6x6
 */

/* ── Container & Header ────────────────────────────────────────────────────── */
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 50px;
}

.header {
    text-align: center;
    margin-bottom: 10px;
    width: 100%;
    max-width: 420px;
}

.title-container {
    margin-bottom: 15px;
}

#gameTitle {
    font-size: 28px;
    color: #00f5ff;
    text-shadow: 0 0 15px rgba(0, 245, 255, 0.6);
    letter-spacing: 4px;
}

.subtitle {
    font-size: 8px;
    color: #8a7fa8;
    letter-spacing: 2px;
    margin-top: 4px;
}

/* ── Stats Bar ─────────────────────────────────────────────────────────────── */
.stats-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 10px 0;
}

.stat-box {
    background: #1a0a2a;
    border: 2px solid #00f5ff;
    border-radius: 6px;
    padding: 8px 18px;
    text-align: center;
    min-width: 90px;
}

.stat-label {
    font-size: 7px;
    color: #8a7fa8;
    letter-spacing: 1px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.stat-value {
    font-size: 16px;
    color: #00f5ff;
    text-shadow: 0 0 8px rgba(0, 245, 255, 0.5);
}

#bestScore {
    color: #ffe03a;
    text-shadow: 0 0 8px rgba(255, 224, 58, 0.5);
}

/* ── Controls ──────────────────────────────────────────────────────────────── */
.controls {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin: 12px 0;
    flex-wrap: wrap;
}

.controls button {
    background: transparent;
    border: 1px solid #8a7fa8;
    color: #8a7fa8;
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
}

.controls button:hover {
    border-color: #00f5ff;
    color: #00f5ff;
}

/* ── Game Board (dynamic grid size) ────────────────────────────────────────── */
.game-board {
    --grid-size: 4;
    display: grid;
    grid-template-columns: repeat(var(--grid-size), 1fr);
    grid-template-rows: repeat(var(--grid-size), 1fr);
    gap: 6px;
    background: #1a0a2a;
    border: 3px solid #00f5ff;
    border-radius: 8px;
    padding: 6px;
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.3);
    width: 100%;
    max-width: 420px;
    aspect-ratio: 1;
}

/* ── Tiles ─────────────────────────────────────────────────────────────────── */
.tile {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: bold;
    border-radius: 6px;
    background: #2a1a3a;
    color: #f0ead8;
    transition: none;
    user-select: none;
    -webkit-user-select: none;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.tile-empty {
    background: rgba(0, 0, 0, 0.2);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
}

/* ── Tile Font Sizes by Grid ───────────────────────────────────────────────── */
.game-board[data-size="5"] .tile { font-size: 18px; }
.game-board[data-size="6"] .tile { font-size: 15px; }

/* ── Tile Colors (values 1-35) ─────────────────────────────────────────────── */
/* Cool blues: 1-4 */
.tile[data-value="1"]  { background: #0a2a5a; color: #5ba3f5; box-shadow: 0 0 6px rgba(91, 163, 245, 0.3); }
.tile[data-value="2"]  { background: #0a3a6a; color: #6ec8ff; box-shadow: 0 0 6px rgba(110, 200, 255, 0.3); }
.tile[data-value="3"]  { background: #0a4a7a; color: #8ed8ff; box-shadow: 0 0 8px rgba(142, 216, 255, 0.3); }
.tile[data-value="4"]  { background: #006a8a; color: #a0f0ff; box-shadow: 0 0 8px rgba(160, 240, 255, 0.35); }

/* Cyans/teals: 5-8 */
.tile[data-value="5"]  { background: #007a6a; color: #40ffc8; box-shadow: 0 0 8px rgba(64, 255, 200, 0.35); }
.tile[data-value="6"]  { background: #008a5a; color: #39ff6e; box-shadow: 0 0 10px rgba(57, 255, 110, 0.4); }
.tile[data-value="7"]  { background: #1a7a1a; color: #5fff5f; box-shadow: 0 0 10px rgba(95, 255, 95, 0.4); }
.tile[data-value="8"]  { background: #3a7a00; color: #a0ff40; box-shadow: 0 0 10px rgba(160, 255, 64, 0.4); }

/* Yellows/ambers: 9-12 */
.tile[data-value="9"]  { background: #6a6a00; color: #ffe03a; box-shadow: 0 0 10px rgba(255, 224, 58, 0.4); }
.tile[data-value="10"] { background: #8a5a00; color: #ffc832; box-shadow: 0 0 12px rgba(255, 200, 50, 0.45); }
.tile[data-value="11"] { background: #aa4a00; color: #ffb03a; box-shadow: 0 0 12px rgba(255, 176, 58, 0.45); }
.tile[data-value="12"] { background: #c43a00; color: #ff9040; box-shadow: 0 0 12px rgba(255, 144, 64, 0.5); }

/* Reds/magentas: 13-15 */
.tile[data-value="13"] { background: #aa1a3a; color: #ff5a7a; box-shadow: 0 0 14px rgba(255, 90, 122, 0.5); }
.tile[data-value="14"] { background: #8a0a5a; color: #ff3d8e; box-shadow: 0 0 14px rgba(255, 61, 142, 0.55); }
.tile[data-value="15"] { background: #6a0080; color: #e040ff; box-shadow: 0 0 16px rgba(224, 64, 255, 0.6); }

/* Deep purples: 16-19 */
.tile[data-value="16"] { background: #4a008a; color: #c060ff; box-shadow: 0 0 16px rgba(192, 96, 255, 0.6); }
.tile[data-value="17"] { background: #3a009a; color: #a070ff; box-shadow: 0 0 16px rgba(160, 112, 255, 0.6); }
.tile[data-value="18"] { background: #2a00aa; color: #8080ff; box-shadow: 0 0 18px rgba(128, 128, 255, 0.6); }
.tile[data-value="19"] { background: #1a00ba; color: #7090ff; box-shadow: 0 0 18px rgba(112, 144, 255, 0.6); }

/* Electric blues: 20-24 */
.tile[data-value="20"] { background: #0a10ca; color: #60a0ff; box-shadow: 0 0 18px rgba(96, 160, 255, 0.65); }
.tile[data-value="21"] { background: #0020ba; color: #50b0ff; box-shadow: 0 0 18px rgba(80, 176, 255, 0.65); }
.tile[data-value="22"] { background: #0030aa; color: #40c0ff; box-shadow: 0 0 20px rgba(64, 192, 255, 0.65); }
.tile[data-value="23"] { background: #0040a0; color: #30d0ff; box-shadow: 0 0 20px rgba(48, 208, 255, 0.7); }
.tile[data-value="24"] { background: #0050a0; color: #20e0ff; box-shadow: 0 0 20px rgba(32, 224, 255, 0.7); }

/* Hot pinks: 25-29 */
.tile[data-value="25"] { background: #8a0060; color: #ff40a0; box-shadow: 0 0 20px rgba(255, 64, 160, 0.7); }
.tile[data-value="26"] { background: #9a0050; color: #ff3090; box-shadow: 0 0 20px rgba(255, 48, 144, 0.7); }
.tile[data-value="27"] { background: #aa0040; color: #ff2080; box-shadow: 0 0 22px rgba(255, 32, 128, 0.7); }
.tile[data-value="28"] { background: #ba0030; color: #ff1070; box-shadow: 0 0 22px rgba(255, 16, 112, 0.75); }
.tile[data-value="29"] { background: #ca0020; color: #ff0060; box-shadow: 0 0 22px rgba(255, 0, 96, 0.75); }

/* Neon greens: 30-34 */
.tile[data-value="30"] { background: #006a20; color: #40ff80; box-shadow: 0 0 22px rgba(64, 255, 128, 0.75); }
.tile[data-value="31"] { background: #007a10; color: #30ff70; box-shadow: 0 0 22px rgba(48, 255, 112, 0.75); }
.tile[data-value="32"] { background: #008a00; color: #20ff60; box-shadow: 0 0 24px rgba(32, 255, 96, 0.8); }
.tile[data-value="33"] { background: #009a00; color: #10ff50; box-shadow: 0 0 24px rgba(16, 255, 80, 0.8); }
.tile[data-value="34"] { background: #00aa00; color: #00ff40; box-shadow: 0 0 24px rgba(0, 255, 64, 0.8); }

/* Gold glow: 35 (highest for 6x6) */
.tile[data-value="35"] { background: #5a3a00; color: #ffd700; box-shadow: 0 0 25px rgba(255, 215, 0, 0.85); animation: glow 2s ease-in-out infinite; }

@keyframes glow {
    0%, 100% { box-shadow: 0 0 16px rgba(255, 215, 0, 0.6); }
    50% { box-shadow: 0 0 28px rgba(255, 215, 0, 0.95); }
}

.mc-back { z-index: 10001; }

/* ── Title Screen ──────────────────────────────────────────────────────────── */
.title-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0a0612;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.title-screen-content {
    text-align: center;
}

.title-large {
    font-size: 120px;
    color: #00f5ff;
    text-shadow: 0 0 40px rgba(0, 245, 255, 0.6), 0 0 80px rgba(0, 245, 255, 0.3);
    line-height: 1;
    animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {
    0%, 100% { text-shadow: 0 0 40px rgba(0, 245, 255, 0.6), 0 0 80px rgba(0, 245, 255, 0.3); }
    50% { text-shadow: 0 0 60px rgba(0, 245, 255, 0.8), 0 0 120px rgba(0, 245, 255, 0.4); }
}

.title-subtitle {
    font-size: 12px;
    color: #8a7fa8;
    letter-spacing: 6px;
    margin-top: 10px;
}

.start-button {
    margin-top: 50px;
    background: transparent;
    border: 2px solid #00f5ff;
    color: #00f5ff;
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    padding: 15px 30px;
    cursor: pointer;
    border-radius: 4px;
    animation: pulse 2s ease-in-out infinite;
    transition: all 0.2s;
}

.start-button:hover {
    background: rgba(0, 245, 255, 0.15);
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.4);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ── Difficulty Modal ──────────────────────────────────────────────────────── */
.difficulty-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0a0612;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
}

.difficulty-modal.active {
    opacity: 1;
    visibility: visible;
}

.difficulty-content {
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.difficulty-content h3 {
    font-size: 16px;
    color: #00f5ff;
    text-shadow: 0 0 15px rgba(0, 245, 255, 0.5);
    margin-bottom: 8px;
}

.difficulty-subtitle {
    font-size: 9px;
    color: #8a7fa8;
    margin-bottom: 25px;
}

.difficulty-selector-container {
    margin-bottom: 25px;
}

/* Custom dropdown for difficulty */
.custom-dropdown-diff {
    position: relative;
    width: 100%;
}

.dropdown-selected-diff {
    background: #1a0a2a;
    border: 2px solid #00f5ff;
    border-radius: 4px;
    padding: 12px 16px;
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    color: #f0ead8;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: border-color 0.15s;
}

.dropdown-selected-diff:hover {
    border-color: #33ffff;
}

.dropdown-arrow-diff {
    font-size: 8px;
    color: #8a7fa8;
}

.dropdown-options-diff {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #1a0a2a;
    border: 2px solid #00f5ff;
    border-top: none;
    border-radius: 0 0 4px 4px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
    z-index: 100;
}

.custom-dropdown-diff.open .dropdown-options-diff {
    max-height: 250px;
    overflow-y: auto;
}

.dropdown-option-diff {
    padding: 12px 16px;
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    color: #f0ead8;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.15s;
}

.dropdown-option-diff:hover {
    background: rgba(0, 245, 255, 0.15);
}

.dropdown-option-diff.highlighted {
    background: rgba(0, 245, 255, 0.2);
    color: #00f5ff;
}

.option-label-diff {
    color: inherit;
}

.option-target-diff {
    color: #8a7fa8;
    font-size: 8px;
}

.dropdown-option-diff.highlighted .option-target-diff {
    color: #00f5ff;
}

.start-game-button {
    background: linear-gradient(180deg, #00f5ff, #0088aa);
    border: none;
    color: #0a0612;
    font-family: 'Press Start 2P', monospace;
    font-size: 11px;
    padding: 14px 28px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
    box-shadow: 0 2px 10px rgba(0, 245, 255, 0.3);
}

.start-game-button:hover {
    background: linear-gradient(180deg, #33ffff, #00bbdd);
    box-shadow: 0 4px 14px rgba(0, 245, 255, 0.5);
    transform: translateY(-1px);
}

.difficulty-menu-buttons {
    margin-top: 20px;
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.difficulty-menu-btn {
    background: transparent;
    border: 1px solid #8a7fa8;
    color: #8a7fa8;
    font-family: 'Press Start 2P', monospace;
    font-size: 7px;
    padding: 7px 10px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
}

.difficulty-menu-btn:hover {
    border-color: #00f5ff;
    color: #00f5ff;
}

/* ── Victory Modal ─────────────────────────────────────────────────────────── */
.victory-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 6, 18, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.victory-modal.active {
    opacity: 1;
    visibility: visible;
}

.victory-content {
    text-align: center;
    background: linear-gradient(135deg, #1a0a2a, #0d0820);
    border: 2px solid #ffe03a;
    border-radius: 8px;
    padding: 30px 40px;
    box-shadow: 0 0 40px rgba(255, 224, 58, 0.3);
}

.victory-content h2 {
    font-size: 20px;
    color: #ffe03a;
    text-shadow: 0 0 15px rgba(255, 224, 58, 0.6);
    margin-bottom: 20px;
}

.victory-stats p {
    font-size: 11px;
    color: #f0ead8;
    margin: 8px 0;
}

.victory-rank {
    font-size: 10px;
    color: #39ff6e;
    margin-top: 15px;
}

.victory-content button {
    margin-top: 20px;
    background: linear-gradient(180deg, #ffe03a, #ccaa00);
    border: none;
    color: #0a0612;
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    padding: 12px 24px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
    box-shadow: 0 2px 8px rgba(255, 224, 58, 0.3);
}

.victory-content button:hover {
    background: linear-gradient(180deg, #fff06a, #ddbb00);
    box-shadow: 0 4px 12px rgba(255, 224, 58, 0.5);
}

/* ── Initials Prompt ───────────────────────────────────────────────────────── */
.initials-prompt {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, #1a0a2a, #0d0820);
    border: 2px solid #ffe03a;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    z-index: 10001;
    display: none;
    box-shadow: 0 0 30px rgba(255, 224, 58, 0.3);
}

.initials-prompt.active {
    display: block;
}

.initials-prompt h3 {
    font-size: 14px;
    color: #ffe03a;
    margin-bottom: 10px;
}

.initials-prompt p {
    font-size: 10px;
    color: #f0ead8;
    margin-bottom: 15px;
}

.initials-prompt input {
    background: #0a0612;
    border: 2px solid #00f5ff;
    border-radius: 4px;
    color: #00f5ff;
    font-family: 'Press Start 2P', monospace;
    font-size: 18px;
    padding: 10px;
    text-align: center;
    width: 120px;
    text-transform: uppercase;
    letter-spacing: 8px;
}

.initials-prompt input:focus {
    outline: none;
    box-shadow: 0 0 10px rgba(0, 245, 255, 0.4);
}

.initials-prompt button {
    margin-top: 15px;
    background: linear-gradient(180deg, #00f5ff, #0088aa);
    border: none;
    color: #0a0612;
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 4px;
}

/* ── Scoreboard Modal ──────────────────────────────────────────────────────── */
.scoreboard-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 6, 18, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.scoreboard-modal.active {
    opacity: 1;
    visibility: visible;
}

.scoreboard-content {
    text-align: center;
    background: linear-gradient(135deg, #1a0a2a, #0d0820);
    border: 2px solid #00f5ff;
    border-radius: 8px;
    padding: 25px 30px;
    max-width: 450px;
    width: 90%;
    box-shadow: 0 0 30px rgba(0, 245, 255, 0.3);
}

.scoreboard-content h3 {
    font-size: 12px;
    color: #00f5ff;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.score-list {
    text-align: left;
    margin: 10px 0;
}

.score-header, .score-row {
    display: flex;
    padding: 6px 0;
    font-size: 9px;
    border-bottom: 1px solid rgba(0, 245, 255, 0.1);
}

.score-header {
    color: #8a7fa8;
    font-size: 7px;
    border-bottom: 2px solid rgba(0, 245, 255, 0.2);
    padding-bottom: 8px;
    margin-bottom: 4px;
}

.rank-col { width: 30px; text-align: center; }
.name-col { flex: 1; padding-left: 10px; }
.score-col { width: 60px; text-align: center; }
.time-col { width: 60px; text-align: center; }

.score-row {
    color: #f0ead8;
}

.score-row:nth-child(2) { color: #ffe03a; }
.score-row:nth-child(3) { color: #c0c0c0; }
.score-row:nth-child(4) { color: #cd7f32; }

.no-scores {
    color: #8a7fa8;
    font-size: 9px;
    padding: 20px 0;
    text-align: center;
}

.scoreboard-content button {
    margin-top: 15px;
    background: transparent;
    border: 1px solid #8a7fa8;
    color: #8a7fa8;
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
}

.scoreboard-content button:hover {
    border-color: #00f5ff;
    color: #00f5ff;
}

/* ── Instructions & Credits Modals ─────────────────────────────────────────── */
.instructions-modal, .credits-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 6, 18, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.instructions-modal.active, .credits-modal.active {
    opacity: 1;
    visibility: visible;
}

.instructions-content, .credits-content {
    text-align: left;
    background: linear-gradient(135deg, #1a0a2a, #0d0820);
    border: 2px solid #00f5ff;
    border-radius: 8px;
    padding: 25px 30px;
    max-width: 480px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 0 30px rgba(0, 245, 255, 0.3);
}

.instructions-content h3, .credits-content h3 {
    font-size: 12px;
    color: #00f5ff;
    margin-bottom: 15px;
    text-align: center;
}

.instructions-content p, .credits-content p {
    font-size: 9px;
    color: #f0ead8;
    line-height: 1.8;
    margin-bottom: 10px;
}

.instructions-content strong, .credits-content strong {
    color: #00f5ff;
}

.instructions-content button, .credits-content button {
    display: block;
    margin: 15px auto 0;
    background: transparent;
    border: 1px solid #8a7fa8;
    color: #8a7fa8;
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
}

.instructions-content button:hover, .credits-content button:hover {
    border-color: #00f5ff;
    color: #00f5ff;
}

/* ── Game Over Overlay (hidden — 15 puzzle has no game over) ───────────────── */
.game-over-overlay {
    display: none !important;
}

/* ── Body Active State ─────────────────────────────────────────────────────── */
body.game-active .controls {
    display: flex;
}

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
    .container {
        padding-top: 40px;
    }

    #gameTitle {
        font-size: 22px;
    }

    .title-large {
        font-size: 80px;
    }

    .title-subtitle {
        font-size: 9px;
        letter-spacing: 4px;
    }

    .stats-container {
        gap: 8px;
    }

    .stat-box {
        padding: 6px 12px;
        min-width: 70px;
    }

    .stat-value {
        font-size: 13px;
    }

    .game-board {
        gap: 4px;
        padding: 4px;
    }

    .tile {
        font-size: 18px;
    }

    .game-board[data-size="5"] .tile { font-size: 14px; }
    .game-board[data-size="6"] .tile { font-size: 12px; }

    .controls button {
        font-size: 7px;
        padding: 6px 10px;
    }

    .difficulty-content h3 {
        font-size: 13px;
    }

    .dropdown-selected-diff {
        font-size: 9px;
        padding: 10px 12px;
    }

    .dropdown-option-diff {
        font-size: 8px;
        padding: 10px 12px;
    }
}

@media (max-width: 360px) {
    #gameTitle {
        font-size: 18px;
    }

    .title-large {
        font-size: 60px;
    }

    .stat-box {
        padding: 5px 8px;
        min-width: 60px;
    }

    .stat-value {
        font-size: 11px;
    }

    .tile {
        font-size: 15px;
    }

    .game-board[data-size="5"] .tile { font-size: 12px; }
    .game-board[data-size="6"] .tile { font-size: 10px; }
}