/* ============================================================
   CSS Custom Properties (Theming)
   ============================================================ */

:root {
    --bg: #fef6e4;
    --primary: #001858;
    --accent1: #f582ae;
    --accent2: #8bd3dd;
    --accent3: #a7ff83;
    --secondary: #f3d2c1;
    --correct: #a7ff83;
    --wrong: #ff6b6b;
    --text: #001858;
    --white: #ffffff;
    --border-w: 6px;
    --shadow: 12px;
}

[data-theme="space"] {
    --bg: #0f0e2e;
    --primary: #d0d0ff;
    --accent1: #ff6bff;
    --accent2: #3a3a8e;
    --accent3: #00ff88;
    --secondary: #1e1e5e;
    --correct: #00ff88;
    --wrong: #ff4455;
    --text: #e0e0ff;
    --white: #1a1a4a;
}

[data-theme="jungle"] {
    --bg: #f0ead2;
    --primary: #2d4a22;
    --accent1: #ff9f1c;
    --accent2: #6a994e;
    --accent3: #a7c957;
    --secondary: #ddb892;
    --correct: #a7c957;
    --wrong: #e63946;
    --text: #2d4a22;
    --white: #fffdf5;
}

[data-theme="ocean"] {
    --bg: #caf0f8;
    --primary: #023e8a;
    --accent1: #f72585;
    --accent2: #0077b6;
    --accent3: #00b4d8;
    --secondary: #90e0ef;
    --correct: #80ed99;
    --wrong: #ff6b6b;
    --text: #023e8a;
    --white: #f0f9ff;
}

[data-theme="candy"] {
    --bg: #fff0f5;
    --primary: #4a154b;
    --accent1: #ff69b4;
    --accent2: #dda0dd;
    --accent3: #98fb98;
    --secondary: #ffe4e1;
    --correct: #98fb98;
    --wrong: #ff6b6b;
    --text: #4a154b;
    --white: #ffffff;
}

/* ============================================================
   Reset & Base
   ============================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial Black', Arial, sans-serif;
    background-color: var(--bg);
    padding: 20px;
    padding-top: 70px;
    min-height: 100vh;
    color: var(--text);
    transition: background-color 0.3s, color 0.3s;
}

/* ============================================================
   Top Bar
   ============================================================ */

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 20px;
    background-color: var(--secondary);
    border-bottom: 4px solid var(--primary);
    z-index: 500;
}

.player-info {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: bold;
    font-size: 1.1rem;
    color: var(--text);
}

.player-avatar {
    font-size: 1.5rem;
}

.top-bar-actions {
    display: flex;
    gap: 6px;
}

.icon-btn {
    background: var(--bg);
    border: 3px solid var(--primary);
    border-radius: 0;
    padding: 6px 10px;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 3px 3px 0 var(--primary);
    transition: all 0.1s;
}

.icon-btn:hover {
    background: var(--accent3);
}

.icon-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--primary);
}

/* ============================================================
   Layout
   ============================================================ */

.container {
    max-width: 900px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    font-size: 3rem;
    color: var(--text);
    text-transform: uppercase;
    margin-bottom: 30px;
    border: var(--border-w) solid var(--primary);
    padding: 20px;
    background-color: var(--accent1);
    box-shadow: var(--shadow) var(--shadow) 0 var(--primary);
}

/* ============================================================
   Mode Selector
   ============================================================ */

.mode-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.mode-btn {
    padding: 12px 20px;
    font-size: 1.15rem;
    font-weight: bold;
    text-transform: uppercase;
    border: var(--border-w) solid var(--primary);
    background-color: var(--secondary);
    color: var(--text);
    cursor: pointer;
    box-shadow: 6px 6px 0 var(--primary);
    transition: all 0.1s;
}

.mode-btn:hover {
    background-color: var(--bg);
}

.mode-btn:active {
    transform: translate(4px, 4px);
    box-shadow: 2px 2px 0 var(--primary);
}

.mode-btn.active {
    background-color: var(--accent3);
    box-shadow: 3px 3px 0 var(--primary);
    transform: translate(3px, 3px);
}

/* ============================================================
   Special Modes
   ============================================================ */

.special-modes {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.special-btn {
    padding: 10px 18px;
    font-size: 1.05rem;
    font-weight: bold;
    text-transform: uppercase;
    border: 4px solid var(--primary);
    background-color: var(--accent1);
    color: var(--text);
    cursor: pointer;
    box-shadow: 4px 4px 0 var(--primary);
    transition: all 0.1s;
}

.special-btn:hover {
    background-color: var(--bg);
}

.special-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--primary);
}

/* ============================================================
   Difficulty Selector
   ============================================================ */

.difficulty-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.difficulty-label {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text);
}

.diff-btn {
    padding: 10px 20px;
    font-size: 1.1rem;
    font-weight: bold;
    border: 4px solid var(--primary);
    background-color: var(--bg);
    color: var(--text);
    cursor: pointer;
    box-shadow: 4px 4px 0 var(--primary);
    transition: all 0.1s;
}

.diff-btn:hover {
    background-color: var(--secondary);
}

.diff-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--primary);
}

.diff-btn.active {
    background-color: var(--accent2);
    box-shadow: 2px 2px 0 var(--primary);
    transform: translate(2px, 2px);
}

/* ============================================================
   Game Area
   ============================================================ */

.game-area {
    background-color: var(--accent2);
    border: var(--border-w) solid var(--primary);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow) var(--shadow) 0 var(--primary);
}

/* ============================================================
   Streak Display
   ============================================================ */

.streak-display {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    padding: 10px 15px;
    background-color: var(--bg);
    border: 4px solid var(--primary);
    box-shadow: 4px 4px 0 var(--primary);
    margin-bottom: 15px;
    font-weight: bold;
    font-size: 1.1rem;
}

.streak-fire {
    font-size: 1.4rem;
    min-width: 30px;
}

.streak-count {
    font-size: 1.6rem;
    color: var(--text);
    min-width: 30px;
    text-align: center;
}

.streak-best {
    margin-left: auto;
    font-size: 0.9rem;
    opacity: 0.7;
}

.streak-milestone {
    animation: streakPulse 0.5s ease-out;
}

@keyframes streakPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* ============================================================
   Timer Bar
   ============================================================ */

.timer-bar {
    margin-bottom: 15px;
    text-align: center;
}

.timer-text {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--text);
}

.timer-progress {
    height: 20px;
    background-color: var(--bg);
    border: 4px solid var(--primary);
    overflow: hidden;
}

.timer-fill {
    height: 100%;
    background-color: var(--accent3);
    width: 100%;
    transition: width 1s linear, background-color 0.5s;
}

.timer-fill.warning {
    background-color: #ffd93d;
}

.timer-fill.danger {
    background-color: var(--wrong);
}

/* ============================================================
   Duel Scoreboard
   ============================================================ */

.duel-scoreboard {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 15px;
    background-color: var(--bg);
    border: 4px solid var(--primary);
    box-shadow: 4px 4px 0 var(--primary);
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.duel-player {
    text-align: center;
    padding: 8px 15px;
    border: 3px solid var(--primary);
    background-color: var(--secondary);
    min-width: 120px;
}

.duel-player.active {
    background-color: var(--accent3);
    box-shadow: 0 0 0 3px var(--accent3);
}

.duel-name {
    display: block;
    font-weight: bold;
    font-size: 1rem;
}

.duel-score {
    display: block;
    font-size: 1.8rem;
    font-weight: bold;
}

.duel-vs {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text);
}

.duel-round {
    font-weight: bold;
    font-size: 1rem;
    width: 100%;
    text-align: center;
}

/* ============================================================
   Lock Controls
   ============================================================ */

.lock-controls {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.lock-option {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--bg);
    border: 4px solid var(--primary);
    padding: 15px;
    box-shadow: 6px 6px 0 var(--primary);
}

.lock-option input[type="checkbox"] {
    width: 30px;
    height: 30px;
    cursor: pointer;
}

.lock-option input[type="number"] {
    width: 60px;
    height: 50px;
    border: 4px solid var(--primary);
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    background-color: var(--white);
    color: var(--text);
}

.lock-option label {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text);
}

/* ============================================================
   Score & Stars
   ============================================================ */

.score {
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text);
    background-color: var(--secondary);
    border: var(--border-w) solid var(--primary);
    padding: 15px;
    box-shadow: 8px 8px 0 var(--primary);
    margin-bottom: 20px;
}

.stars-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    padding: 20px;
    background-color: var(--bg);
    border: var(--border-w) solid var(--primary);
    margin-bottom: 20px;
    box-shadow: 8px 8px 0 var(--primary);
    min-height: 80px;
    align-items: center;
}

.stars-label {
    color: var(--text);
    font-weight: bold;
    font-size: 1.2rem;
}

.star {
    font-size: 3rem;
    animation: starPop 0.5s ease-out;
}

@keyframes starPop {
    0% { transform: scale(0) rotate(0deg); }
    50% { transform: scale(1.2) rotate(180deg); }
    100% { transform: scale(1) rotate(360deg); }
}

.reset-button {
    text-align: center;
    margin-bottom: 20px;
}

.reset-button button {
    background-color: var(--wrong);
    padding: 15px 30px;
    font-size: 1.2rem;
    color: var(--text);
}

.reset-button button:hover {
    background-color: #ff5252;
}

/* ============================================================
   Question Area
   ============================================================ */

.question {
    text-align: center;
    margin-bottom: 30px;
}

.numbers {
    font-size: 4rem;
    color: var(--text);
    margin-bottom: 20px;
    font-weight: bold;
}

.answer-input {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    align-items: center;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

#answer {
    width: 150px;
    height: 80px;
    font-size: 3rem;
    font-weight: bold;
    text-align: center;
    border: var(--border-w) solid var(--primary);
    background-color: var(--white);
    color: var(--text);
    box-shadow: 8px 8px 0 var(--primary);
}

button {
    padding: 20px 40px;
    font-size: 1.5rem;
    font-weight: bold;
    text-transform: uppercase;
    border: var(--border-w) solid var(--primary);
    background-color: var(--secondary);
    color: var(--text);
    cursor: pointer;
    box-shadow: 8px 8px 0 var(--primary);
    transition: all 0.1s;
}

button:hover {
    background-color: var(--bg);
}

button:active {
    transform: translate(4px, 4px);
    box-shadow: 4px 4px 0 var(--primary);
}

/* ============================================================
   Helper Tables
   ============================================================ */

.toggle-tables {
    text-align: center;
    margin-bottom: 20px;
}

.toggle-tables button {
    padding: 15px 30px;
    font-size: 1.2rem;
}

.tables-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.tables-container.hidden {
    display: none;
}

.table {
    background-color: var(--bg);
    border: var(--border-w) solid var(--primary);
    padding: 20px;
    box-shadow: 8px 8px 0 var(--primary);
}

.table h3 {
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 15px;
    text-align: center;
    text-transform: uppercase;
}

.table-row {
    font-size: 1.3rem;
    padding: 8px;
    color: var(--text);
    border-bottom: 3px solid var(--primary);
}

.table-row:last-child {
    border-bottom: none;
}

/* ============================================================
   Feedback Modal
   ============================================================ */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 24, 88, 0.8);
    justify-content: center;
    align-items: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--bg);
    border: 8px solid var(--primary);
    padding: 40px;
    text-align: center;
    box-shadow: 16px 16px 0 var(--primary);
    max-width: 500px;
    width: 90%;
    animation: modalPop 0.3s ease-out;
    max-height: 90vh;
    overflow-y: auto;
    color: var(--text);
}

@keyframes modalPop {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.modal-content.correct {
    background-color: var(--correct);
}

.modal-content.wrong {
    background-color: var(--wrong);
}

.modal-message {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text);
    margin-bottom: 20px;
}

.modal-content.wrong .modal-message {
    color: var(--white);
}

.modal-close {
    padding: 15px 30px;
    font-size: 1.3rem;
    margin-top: 10px;
}

.cancel-btn {
    background-color: var(--secondary) !important;
    margin-left: 10px;
}

.modal-image {
    max-width: 200px;
    width: 100%;
    margin-bottom: 20px;
    border: var(--border-w) solid var(--primary);
    box-shadow: 8px 8px 0 var(--primary);
}

/* ============================================================
   Achievement Toast
   ============================================================ */

.achievement-toast {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: var(--accent3);
    border: 4px solid var(--primary);
    padding: 12px 24px;
    box-shadow: 6px 6px 0 var(--primary);
    z-index: 2000;
    transition: top 0.4s ease-out;
    min-width: 280px;
}

.achievement-toast.show {
    top: 80px;
}

.achievement-toast-icon {
    font-size: 2rem;
}

.achievement-toast-title {
    font-weight: bold;
    font-size: 1.1rem;
    color: var(--text);
}

.achievement-toast-desc {
    font-size: 0.9rem;
    color: var(--text);
    opacity: 0.8;
}

/* ============================================================
   Achievement Gallery
   ============================================================ */

.gallery-content {
    max-width: 600px;
}

.achievement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.achievement-card {
    padding: 15px 10px;
    border: 3px solid var(--primary);
    background-color: var(--bg);
    text-align: center;
    box-shadow: 3px 3px 0 var(--primary);
}

.achievement-card.locked {
    opacity: 0.4;
    filter: grayscale(1);
}

.achievement-card-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 5px;
}

.achievement-card-name {
    font-weight: bold;
    font-size: 0.85rem;
    margin-bottom: 3px;
}

.achievement-card-desc {
    font-size: 0.75rem;
    opacity: 0.7;
}

/* ============================================================
   Leaderboard
   ============================================================ */

.leaderboard-content {
    max-width: 500px;
}

.leaderboard-tabs {
    display: flex;
    gap: 8px;
    margin: 15px 0;
    justify-content: center;
}

.lb-tab {
    padding: 8px 16px !important;
    font-size: 1rem !important;
    border: 3px solid var(--primary) !important;
    box-shadow: 3px 3px 0 var(--primary) !important;
}

.lb-tab.active {
    background-color: var(--accent2) !important;
}

.leaderboard-list {
    margin: 15px 0;
    max-height: 300px;
    overflow-y: auto;
}

.leaderboard-entry {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    border: 2px solid var(--primary);
    margin-bottom: 6px;
    background-color: var(--bg);
    font-weight: bold;
}

.leaderboard-entry:nth-child(1) { background-color: #ffd700; }
.leaderboard-entry:nth-child(2) { background-color: #c0c0c0; }
.leaderboard-entry:nth-child(3) { background-color: #cd7f32; }

.leaderboard-rank {
    font-size: 1.2rem;
    min-width: 30px;
}

.leaderboard-name {
    flex: 1;
    margin: 0 10px;
}

.leaderboard-score {
    font-size: 1.2rem;
}

.leaderboard-loading {
    text-align: center;
    padding: 20px;
    font-style: italic;
}

/* ============================================================
   Theme Selector
   ============================================================ */

.theme-content {
    max-width: 500px;
}

.theme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.theme-card {
    padding: 15px;
    border: 4px solid var(--primary);
    cursor: pointer;
    text-align: center;
    box-shadow: 4px 4px 0 var(--primary);
    transition: all 0.1s;
}

.theme-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--primary);
}

.theme-card.active {
    box-shadow: 2px 2px 0 var(--primary);
    transform: translate(2px, 2px);
    outline: 3px solid var(--accent3);
}

.theme-card-preview {
    width: 100%;
    height: 40px;
    border: 2px solid #001858;
    margin-bottom: 8px;
    display: flex;
}

.theme-card-preview span {
    flex: 1;
}

.theme-card-name {
    font-weight: bold;
    font-size: 0.9rem;
}

/* ============================================================
   Player Name Modal
   ============================================================ */

.player-content {
    max-width: 450px;
}

.player-list {
    margin: 10px 0;
    max-height: 200px;
    overflow-y: auto;
}

.player-list-entry {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    border: 3px solid var(--primary);
    margin-bottom: 6px;
    background-color: var(--bg);
    cursor: pointer;
    transition: all 0.1s;
    font-weight: bold;
}

.player-list-entry:hover {
    background-color: var(--secondary);
}

.player-list-entry.current {
    background-color: var(--accent3);
}

.player-list-name {
    font-size: 1.1rem;
}

.player-list-stats {
    font-size: 0.8rem;
    opacity: 0.7;
}

.player-new-section {
    margin-top: 15px;
    border-top: 3px solid var(--primary);
    padding-top: 15px;
}

.player-sync-status {
    font-size: 0.85rem;
    text-align: center;
    margin-top: 8px;
    min-height: 1.2em;
    opacity: 0.7;
}

.name-input {
    width: 100%;
    padding: 15px;
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    border: 4px solid var(--primary);
    background: var(--white);
    color: var(--text);
    box-shadow: 4px 4px 0 var(--primary);
    margin: 10px 0;
}

/* ============================================================
   Time Challenge Results
   ============================================================ */

.time-result-content {
    max-width: 400px;
}

.time-result-score {
    margin: 20px 0;
}

.time-result-number {
    font-size: 5rem;
    font-weight: bold;
    display: block;
    color: var(--text);
}

.time-result-label {
    font-size: 1.3rem;
    display: block;
}

.time-result-best {
    font-size: 1rem;
    margin-bottom: 15px;
    opacity: 0.8;
}

/* ============================================================
   Duel Setup & Results
   ============================================================ */

.duel-setup-content {
    max-width: 450px;
}

.duel-setup-desc {
    font-size: 1.1rem;
    margin: 10px 0;
}

.duel-name-inputs {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 15px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.duel-name-vs {
    font-size: 1.5rem;
    font-weight: bold;
}

.duel-turn-content {
    max-width: 400px;
}

.duel-turn-content h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.duel-turn-content p {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.duel-result-content {
    max-width: 450px;
}

.duel-winner {
    font-size: 2rem;
    font-weight: bold;
    margin: 15px 0;
    padding: 15px;
    background-color: var(--accent3);
    border: 4px solid var(--primary);
}

.duel-final-player {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    border: 3px solid var(--primary);
    margin: 8px 0;
    font-weight: bold;
    font-size: 1.2rem;
    background-color: var(--bg);
}

/* ============================================================
   Daily Challenge
   ============================================================ */

.daily-result-content {
    max-width: 450px;
}

.daily-score-big {
    font-size: 4rem;
    font-weight: bold;
    margin: 15px 0;
}

.daily-detail {
    font-size: 1.1rem;
    margin: 5px 0;
}

/* ============================================================
   Parent Dashboard
   ============================================================ */

.parent-content {
    max-width: 600px;
}

.parent-dashboard {
    text-align: left;
    margin: 15px 0;
}

.parent-section {
    margin-bottom: 20px;
}

.parent-section h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    padding-bottom: 5px;
    border-bottom: 3px solid var(--primary);
}

.parent-stat {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 1rem;
}

.parent-bar-container {
    margin: 6px 0;
}

.parent-bar-label {
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 3px;
}

.parent-bar {
    height: 20px;
    background-color: var(--secondary);
    border: 2px solid var(--primary);
    position: relative;
    overflow: hidden;
}

.parent-bar-fill {
    height: 100%;
    background-color: var(--accent3);
    transition: width 0.5s;
}

.parent-bar-fill.weak {
    background-color: var(--wrong);
}

.parent-bar-fill.medium {
    background-color: #ffd93d;
}

.parent-problem-list {
    list-style: none;
    padding: 0;
}

.parent-problem-list li {
    padding: 4px 0;
    font-size: 0.95rem;
    display: flex;
    justify-content: space-between;
}

/* ============================================================
   Fireworks
   ============================================================ */

.firework {
    position: fixed;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 1001;
}

@keyframes fireworkExplode {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    70% { transform: translate(var(--tx), var(--ty)) scale(1); opacity: 1; }
    100% { transform: translate(var(--tx), var(--ty)) scale(0.5); opacity: 0; }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
        padding: 15px;
    }

    .numbers {
        font-size: 3rem;
    }

    #answer {
        width: 120px;
        height: 60px;
        font-size: 2rem;
    }

    .tables-container {
        grid-template-columns: 1fr;
    }

    .lock-controls {
        flex-direction: column;
    }

    .mode-selector {
        flex-direction: column;
        align-items: stretch;
    }

    .mode-btn {
        font-size: 1rem;
        padding: 10px 15px;
    }

    .special-modes {
        flex-direction: column;
        align-items: stretch;
    }

    .special-btn {
        font-size: 0.95rem;
        padding: 10px 15px;
    }

    .difficulty-selector {
        flex-direction: column;
        align-items: stretch;
    }

    .difficulty-label {
        text-align: center;
    }

    .diff-btn {
        font-size: 1rem;
        padding: 10px 15px;
    }

    .top-bar {
        padding: 6px 10px;
    }

    .icon-btn {
        padding: 4px 7px;
        font-size: 1rem;
    }

    .modal-content {
        padding: 25px;
    }

    .modal-message {
        font-size: 1.8rem;
    }

    .achievement-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    }

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

    .duel-name-inputs {
        flex-direction: column;
    }
}