/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --border-color: #e0e0e0;
    --button-bg: #000000;
    --button-text: #ffffff;
    --button-hover-bg: #ffffff;
    --button-hover-text: #000000;
    --accent-color: #3b82f6;
    
    /* 動畫相關 */
    --transition-fast: 0.15s;
    --transition-normal: 0.25s;
    --transition-slow: 0.3s;
    --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow: hidden;
}

/* Theme Colors */
html.theme-light {
    --bg-color: #ffffff;
    --text-color: #000000;
    --border-color: #e0e0e0;
    --button-bg: #000000;
    --button-text: #ffffff;
    --button-hover-bg: #f5f5f5;
    --button-hover-text: #000000;
    --accent-color: #3b82f6;
}

html.theme-dark {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --border-color: #333333;
    --button-bg: #e0e0e0;
    --button-text: #1a1a1a;
    --button-hover-bg: #2a2a2a;
    --button-hover-text: #e0e0e0;
    --accent-color: #60a5fa;
}

html.theme-blue {
    --bg-color: #dbeafe;
    --text-color: #1e3a8a;
    --border-color: #93c5fd;
    --button-bg: #1e40af;
    --button-text: #ffffff;
    --button-hover-bg: #bfdbfe;
    --button-hover-text: #1e40af;
    --accent-color: #2563eb;
}

html.theme-green {
    --bg-color: #dcfce7;
    --text-color: #14532d;
    --border-color: #86efac;
    --button-bg: #15803d;
    --button-text: #ffffff;
    --button-hover-bg: #bbf7d0;
    --button-hover-text: #15803d;
    --accent-color: #16a34a;
}

html.theme-purple {
    --bg-color: #f3e8ff;
    --text-color: #581c87;
    --border-color: #d8b4fe;
    --button-bg: #7e22ce;
    --button-text: #ffffff;
    --button-hover-bg: #e9d5ff;
    --button-hover-text: #7e22ce;
    --accent-color: #9333ea;
}

html.theme-sunset {
    --bg-color: #fff7ed;
    --text-color: #7c2d12;
    --border-color: #fed7aa;
    --button-bg: #c2410c;
    --button-text: #ffffff;
    --button-hover-bg: #ffedd5;
    --button-hover-text: #c2410c;
    --accent-color: #ea580c;
}

/* Theme-specific race option backgrounds */
html.theme-dark .race-option {
    background: rgba(255, 255, 255, 0.05);
}

html.theme-blue .race-option {
    background: rgba(59, 130, 246, 0.05);
}

html.theme-green .race-option {
    background: rgba(34, 197, 94, 0.05);
}

html.theme-purple .race-option {
    background: rgba(147, 51, 234, 0.05);
}

html.theme-sunset .race-option {
    background: rgba(249, 115, 22, 0.05);
}

body.leaderboard-page {
    overflow: auto;
    padding: 2rem 1.5rem 3rem;
}

.leaderboard-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.leaderboard-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: start;
    gap: 1.25rem;
    min-height: 80px;
    width: 100%;
    margin-bottom: 1.5rem;
}

.leaderboard-header-left,
.leaderboard-header-right {
    display: flex;
    align-items: center;
}

.leaderboard-header-left {
    justify-content: flex-start;
}

.leaderboard-header-right {
    justify-content: flex-end;
}



.leaderboard-heading {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
    text-align: center;
    justify-self: center;
    grid-column: 2;
}

.leaderboard-header h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: 0.1em;
    line-height: 1.1;
    margin: 0;
}

/* Title with tooltip */
.leaderboard-title-with-tooltip {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.tooltip-icon {
    font-size: 1rem;
    opacity: 0.6;
    cursor: help;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.tooltip-icon:hover {
    opacity: 1;
    transform: scale(1.1);
}

.leaderboard-tooltip {
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 0;
    min-width: 320px;
    max-width: 420px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
    z-index: 100;
    pointer-events: none;
}

.leaderboard-title-with-tooltip:hover .leaderboard-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tooltip-section {
    margin-bottom: 1rem;
}

.tooltip-section:last-child {
    margin-bottom: 0;
}

.tooltip-section h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 0.6rem 0;
    opacity: 0.95;
}

.tooltip-section ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tooltip-section li {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.85;
    line-height: 1.5;
    padding-left: 0.25rem;
}


.leaderboard-main {
    background: rgba(0, 0, 0, 0.02);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.leaderboard-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.select-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 200px;
}

.leaderboard-select-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.85;
}

.select-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.select-chevron {
    position: absolute;
    right: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.25rem;
    height: 1.25rem;
    pointer-events: none;
    fill: var(--text-color);
    opacity: 0.6;
    transition: all 0.25s ease;
}


.leaderboard-select {
    width: 100%;
    padding: 0.85rem 2.75rem 0.85rem 1rem;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(59, 130, 246, 0));
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease, background 0.2s ease;
    background-image: none;
}

.leaderboard-select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

.leaderboard-select:hover {
    border-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.leaderboard-select:hover + .select-chevron {
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
}

.leaderboard-select:focus-visible {
    outline: none;
    border-color: rgba(59, 130, 246, 0.9);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

.leaderboard-select option {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 0.5rem;
}

.select-chevron {
    display: none;
    transform: translateY(-50%);
}

.leaderboard-status {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-color);
    opacity: 0.7;
}

.leaderboard-status.error {
    color: #b91c1c;
    opacity: 1;
}

.leaderboard-main .leaderboard-status {
    text-align: center;
    margin: auto;
}

.leaderboard-table-wrapper {
    overflow-x: auto;
}

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

.leaderboard-table thead {
    background-color: rgba(0, 0, 0, 0.05);
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

.leaderboard-table th {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.7;
}

.leaderboard-table tbody tr {
    transition: background-color 0.2s ease;
}

.leaderboard-table tbody tr:nth-child(even) {
    background-color: rgba(15, 23, 42, 0.015);
}

.leaderboard-table tbody tr:hover {
    background-color: rgba(59, 130, 246, 0.08);
}

.leaderboard-row-highlight {
    background: rgba(59, 130, 246, 0.12);
    color: var(--text-color);
    box-shadow: inset 0 0 0 2px rgba(59, 130, 246, 0.35);
}

.leaderboard-row-highlight td {
    font-weight: 700;
}

.highlight-label {
    color: var(--accent-color);
    font-weight: 600;
}

@media (max-width: 768px) {
    .leaderboard-container {
        gap: 1.25rem;
    }

    .leaderboard-header {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        justify-items: center;
        gap: 1rem;
    }

    .leaderboard-header-left,
    .leaderboard-header-right {
        justify-content: center;
        width: 100%;
    }

    .leaderboard-header-right {
        min-height: 0;
    }

    .leaderboard-heading h1 {
        font-size: 2rem;
    }

    .leaderboard-tooltip {
        left: 50%;
        transform: translateX(-50%) translateY(-8px);
        min-width: 280px;
        max-width: 90vw;
    }

    .leaderboard-title-with-tooltip:hover .leaderboard-tooltip {
        transform: translateX(-50%) translateY(0);
    }

    .leaderboard-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .select-group {
        min-width: unset;
        width: 100%;
    }

    .leaderboard-select {
        width: 100%;
    }
    
    .header-nav-btn span {
        display: inline; /* 確保文字顯示 */
    }
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Header */
header,
.leaderboard-header,
.game-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: start;
    margin-bottom: 1rem; /* 減少底部邊距 */
    gap: 0.75rem; /* 減少間距 */
    min-height: 60px; /* 減少最小高度以節省空間 */
    width: 100%;
}

.header-left,
.leaderboard-header-left,
.game-header-left {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.header-right,
.leaderboard-header-right,
.game-header-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    min-height: 44px; /* 防止按鈕載入時跳動 */
}

/* 防止載入時閃爍 - 為按鈕保留空間 */
.user-status {
    min-width: 100px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.15s ease-in-out;
}

.user-status-loading .loading-placeholder {
    display: inline-block;
    width: 80px;
    height: 36px;
    background: linear-gradient(90deg, rgba(0,0,0,0.05) 25%, rgba(0,0,0,0.08) 50%, rgba(0,0,0,0.05) 75%);
    background-size: 200% 100%;
    border-radius: 999px;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 統一的導航按鈕樣式 (排行榜、返回按鈕) */
.header-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.2rem;
    font-size: 0.95rem;
    font-weight: 600;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 2px solid var(--button-bg);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-normal) var(--ease-out);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    min-height: 44px;
    white-space: nowrap;
    will-change: transform, box-shadow;
}

.header-nav-btn:hover {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.header-nav-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.header-nav-btn svg {
    flex-shrink: 0;
}

.site-title {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    line-height: 1.1;
    text-align: center;
    grid-column: 2;
}

.site-title div:first-child {
    margin-bottom: -0.2rem;
}


.user-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(147, 51, 234, 0.12));
    border: 2px solid rgba(59, 130, 246, 0.3);
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.15);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.user-chip:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
    border-color: rgba(59, 130, 246, 0.5);
}

.user-chip::before {
    content: '';
    font-size: 1.1rem;
}

.user-chip.error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.12), rgba(220, 38, 38, 0.12));
    border-color: rgba(239, 68, 68, 0.3);
    color: #b91c1c;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.15);
}

.user-chip.error:hover {
    border-color: rgba(239, 68, 68, 0.5);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.25);
}

.settings-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
}

.settings-btn:hover {
    opacity: 0.7;
    transform: rotate(90deg);
    background-color: rgba(0, 0, 0, 0.05);
}

.settings-btn:active {
    transform: rotate(90deg) scale(0.9);
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-color);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.6;
    margin-bottom: -2px;
    position: relative;
}

.tab-btn::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-btn:hover {
    opacity: 0.8;
}

.tab-btn.active {
    opacity: 1;
}

.tab-btn.active::before {
    transform: scaleX(1);
}

/* Tab Content */
.tab-content-wrapper {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.5rem 0;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.description {
    color: var(--text-color);
    opacity: 0.7;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    text-align: center;
}

/* Buttons */
.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.game-btn {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 2px solid var(--button-bg);
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal) var(--ease-out);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    /* 優化動畫性能 */
    will-change: transform, box-shadow;
}

.game-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.game-btn:hover {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.game-btn:hover::before {
    opacity: 1;
}

.game-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Race Mode Sub-tabs */
.race-sub-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.race-sub-btn {
    flex: 0 1 auto;
    background: var(--button-hover-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.race-sub-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.race-sub-btn.active {
    background: var(--button-bg);
    color: var(--button-text);
    border-color: var(--button-bg);
}

.race-mode-content {
    display: none;
}

.race-mode-content.active {
    display: block;
}

.mode-description {
    text-align: center;
    font-size: 1rem;
    color: var(--text-color);
    opacity: 0.85;
    margin-bottom: 1.5rem;
    padding: 0 1rem;
}

/* Race Mode Grid Layout */
.race-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* 隱藏競速模式的滾動條 */
#race-tab {
    overflow: hidden;
}

#race-tab .tab-content-wrapper {
    overflow-y: auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

#race-tab .tab-content-wrapper::-webkit-scrollbar {
    display: none; /* Chrome/Safari/Opera */
}

.race-option {
    background: rgba(0, 0, 0, 0.02);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.race-option:hover {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.race-option h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--text-color);
}

.race-count-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.race-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.2rem 1rem;
    min-width: 90px;
    gap: 0.3rem;
}

.race-btn svg {
    margin-bottom: 0.25rem;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.race-btn:hover svg {
    opacity: 1;
}

.race-btn .count-number {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.race-btn .count-label {
    font-size: 0.9rem;
    opacity: 0.8;
    font-weight: 500;
}

.dark-btn {
    min-width: 120px;
}

.dark-btn svg {
    width: 32px;
    height: 32px;
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    color: var(--text-color);
    transition: opacity 0.2s ease;
}

.social-links a:hover {
    opacity: 0.6;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--bg-color);
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content h2 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.modal-content p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-color);
}

.modal-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.modal-buttons .menu-btn {
    flex: 1;
    min-width: 120px;
}

/* Settings Modal */
.settings-modal {
    max-width: 500px;
}

/* Auth Modal */
.auth-modal {
    max-width: 420px;
    gap: 1.5rem;
}

.auth-tabs {
    display: flex;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.04);
    padding: 0.4rem;
    border-radius: 999px;
}

.auth-tab-btn {
    flex: 1;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: none;
    background: transparent;
    color: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.auth-tab-btn.active {
    background: rgba(0, 0, 0, 0.08);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-form.hidden {
    display: none;
}

.hidden {
    display: none !important;
}

.auth-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.auth-field label {
    font-size: 0.95rem;
    font-weight: 600;
}

.auth-field input {
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.auth-field input:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.6);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Password Field with Toggle Button */
.password-field {
    position: relative;
}

.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    width: 100%;
    padding-right: 3rem;
}

.toggle-password {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    opacity: 0.6;
    transition: opacity 0.2s ease;
    border-radius: 4px;
}

.toggle-password:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.05);
}

.toggle-password svg {
    width: 20px;
    height: 20px;
}

/* Password Strength Indicator */
.password-strength {
    margin-top: 0.5rem;
    display: none;
}

.password-strength.visible {
    display: block;
}

.strength-bar {
    height: 4px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.strength-bar-fill {
    height: 100%;
    width: 0%;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.strength-bar-fill.weak {
    width: 33%;
    background: linear-gradient(90deg, #ef4444, #f87171);
}

.strength-bar-fill.medium {
    width: 66%;
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.strength-bar-fill.strong {
    width: 100%;
    background: linear-gradient(90deg, #10b981, #34d399);
}

.strength-text {
    font-size: 0.85rem;
    font-weight: 500;
}

.strength-text.weak {
    color: #ef4444;
}

.strength-text.medium {
    color: #f59e0b;
}

.strength-text.strong {
    color: #10b981;
}

.auth-submit {
    padding: 0.85rem 1.25rem;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, #2563eb, #9333ea);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s ease, box-shadow 0.2s ease;
}

.auth-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.auth-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #b91c1c;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.95rem;
}

.auth-success {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #1d4ed8;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.95rem;
}

.auth-footer-text {
    text-align: center;
    font-size: 0.95rem;
    color: rgba(0, 0, 0, 0.65);
}

html.theme-dark .auth-footer-text {
    color: rgba(224, 224, 224, 0.75);
}

.auth-footer-text button {
    background: none;
    border: none;
    color: var(--accent-color);
    font-weight: 600;
    cursor: pointer;
}

#authStatus {
    min-height: 1.2rem;
}

.auth-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.auth-loading::after {
    content: '';
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(37, 99, 235, 0.4);
    border-top-color: var(--accent-color);
    border-radius: 999px;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.setting-group {
    margin-bottom: 2rem;
    text-align: left;
}

.setting-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.setting-group .button-group {
    display: flex;
    gap: 0.5rem;
}

.setting-btn {
    flex: 1;
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
}

.setting-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.setting-btn.active {
    background-color: var(--button-bg);
    color: var(--button-text);
    border-color: var(--button-bg);
    transform: translateY(0);
}

/* Theme Grid */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.theme-btn {
    background-color: var(--button-hover-bg);
    border: 2px solid var(--border-color);
    padding: 0.75rem;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.theme-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.theme-btn.active {
    border-color: var(--accent-color);
    border-width: 3px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.theme-preview {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.light-preview {
    background: linear-gradient(135deg, #ffffff 50%, #000000 50%);
}

.system-preview {
    background: conic-gradient(from 180deg at 50% 50%, #ffffff 0deg 180deg, #1a1a1a 180deg 360deg);
}

.dark-preview {
    background: linear-gradient(135deg, #1a1a1a 50%, #e0e0e0 50%);
}

.blue-preview {
    background: linear-gradient(135deg, #dbeafe 50%, #1e40af 50%);
}

.green-preview {
    background: linear-gradient(135deg, #dcfce7 50%, #15803d 50%);
}

.purple-preview {
    background: linear-gradient(135deg, #f3e8ff 50%, #7e22ce 50%);
}

.sunset-preview {
    background: linear-gradient(135deg, #fff7ed 50%, #c2410c 50%);
}

.theme-btn span {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-color);
}

.close-btn {
    width: 100%;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 0.875rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.close-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Game Page Styles */
.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100); /* 使用動態視窗高度 */
    padding: 1rem;
    padding-bottom: 1rem; /* 桌面端底部padding */
    overflow: hidden;
    box-sizing: border-box;
}


.game-header {
    width: 100%;
    max-width: 900px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: start;
    margin-bottom: 1.5rem;
    gap: 1rem;
    min-height: 80px;
}



.game-header-left {
    justify-content: flex-start;
}

.game-header-right {
    justify-content: flex-end;
}

.game-header .header-nav-btn {
    justify-content: center;
}

.game-info {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 600;
}

.pause-btn {
    grid-column: 3;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 2px solid var(--button-bg);
    padding: 0.5rem;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
}

.pause-btn:hover {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.pause-btn:active {
    transform: scale(0.95);
}

.canvas-wrapper {
    flex: 1;
    display: flex;
    align-items: flex-start; /* 從頂部開始對齊，而不是居中 */
    justify-content: center;
    width: 100%;
    max-width: 900px;
    overflow: hidden;
    min-height: 0; /* 允許 flex 項目縮小 */
    padding-top: 0.5rem; /* 減少頂部間距以增加迷宮空間 */
}

.back-btn, .menu-btn {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 2px solid var(--button-bg);
    padding: 0.625rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
    min-height: 40px; /* 防止按鈕載入時跳動 */
    white-space: nowrap;
}

.back-btn:hover, .menu-btn:hover {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.back-btn:active, .menu-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.menu-btn.tertiary {
    background-color: transparent;
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.menu-btn.tertiary:hover {
    background-color: var(--accent-color);
    color: var(--button-text);
    border-color: var(--accent-color);
}

.menu-btn.secondary {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
}

.menu-btn.secondary:hover {
    background-color: var(--button-bg);
    color: var(--button-text);
}

#gameCanvas {
    border: 2px solid var(--border-color);
    background-color: var(--bg-color);
    border-radius: 8px;
    touch-action: none;
    display: block;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.game-status {
    margin-top: 0.5rem; /* 減少上邊距 */
    padding: 0.4rem 0.75rem; /* 減少內邊距 */
    font-size: 0.9rem; /* 稍微縮小字體 */
    text-align: center;
    min-height: 1.2rem; /* 減少最小高度 */
    font-weight: 600;
    border-radius: 6px; /* 稍微減小圓角 */
    transition: all 0.3s ease;
}

.game-status.error {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
}

.game-status.success {
    color: #10b981;
    background-color: rgba(16, 185, 129, 0.1);
}

/* Virtual D-Pad */
.dpad-container {
    position: fixed;
    bottom: 1rem;
    bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
    left: 50%;
    transform: translateX(-50%);
    display: none; /* 預設隱藏，只在手機端顯示 */
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    z-index: 2000;
    pointer-events: none;
}

.dpad-bottom-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    pointer-events: none;
}

.dpad-btn {
    width: 70px;
    height: 70px;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 2px solid var(--button-bg);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    touch-action: manipulation;
    pointer-events: auto;
}

.dpad-btn:hover {
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.dpad-btn:active,
.dpad-btn.dpad-pressed {
    background-color: var(--accent-color);
    transform: scale(0.95);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.dpad-up {
    /* 單獨在上方，由 flex 自動排列 */
}

.dpad-down,
.dpad-left,
.dpad-right {
    /* 在下方一排，由 dpad-bottom-row 的 flex 自動排列 */
}

/* Mobile Responsive */
@media (max-width: 768px) {
    header {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .header-left {
        grid-row: 1;
        grid-column: 1;
    }

    .site-title {
        font-size: 2.5rem;
        grid-row: 2;
        grid-column: 1;
    }

    .header-right {
        grid-row: 1;
        grid-column: 1;
        justify-content: flex-end;
    }

    .header-nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .header-nav-btn svg {
        width: 18px;
        height: 18px;
    }

    .user-chip {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }

    .tab-btn {
        font-size: 0.9rem;
        padding: 0.6rem 0.5rem;
    }

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

    .game-btn {
        padding: 0.9rem 1.2rem;
    }

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

    .game-header {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        justify-items: center;
        gap: 0.5rem; /* 減少間距以節省垂直空間 */
        margin-bottom: 1rem; /* 減少底部邊距 */
        min-height: 60px; /* 減少最小高度 */
    }

    .game-header-left,
    .game-header-right {
        justify-content: center;
    }

    .game-info {
        gap: 1rem;
        font-size: 1rem;
    }

    .pause-btn {
        display: none;
    }

    /* 在手機端顯示方向鍵 */
    .dpad-container {
        display: flex;
    }
    
    /* 調整遊戲容器，為方向鍵留出空間 */
    .game-container {
        padding: 0.5rem 0.5rem; /* 減少所有 padding 以最大化迷宮空間 */
    }
    
    /* 調整canvas容器，確保迷宮不被遮擋 */
    .canvas-wrapper {
        margin-bottom: 0;
        padding-bottom: 0;
        padding-top: 0.25rem; /* 手機端最小化頂部間距以增加迷宮尺寸 */
        flex-shrink: 1; /* 允許在空間不足時縮小 */
        align-items: flex-start; /* 確保從頂部對齊 */
    }
}

@media (max-width: 480px) {
    header {
        gap: 0.75rem;
    }

    .site-title {
        font-size: 2rem;
    }

    .header-nav-btn span {
        display: none;
    }

    .header-nav-btn {
        padding: 0.5rem;
        min-width: 44px;
    }

    .header-nav-btn svg {
        margin-right: 0 !important;
    }

    .user-chip {
        padding: 0.35rem 0.65rem;
        font-size: 0.8rem;
    }

    .container {
        padding: 1rem 0.75rem;
    }

    .tab-btn {
        font-size: 0.85rem;
        padding: 0.5rem 0.25rem;
    }

    .social-links {
        gap: 1.5rem;
    }

    .race-count-group {
        gap: 0.75rem;
    }

    .race-btn {
        min-width: 70px;
        padding: 1rem 0.75rem;
    }
    
    .race-btn .count-number {
        font-size: 1.5rem;
    }
    
    .race-btn .count-label {
        font-size: 0.75rem;
    }

    .modal-content {
        padding: 1.5rem;
    }

    .settings-modal {
        max-width: 95%;
    }

    .theme-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .theme-preview {
        width: 35px;
        height: 35px;
    }

    .dpad-btn {
        width: 65px;
        height: 65px;
    }
    
    .dpad-btn svg {
        width: 26px;
        height: 26px;
    }
    
    .dpad-bottom-row {
        gap: 0.6rem;
    }
    
    .dpad-container {
        gap: 0.6rem;
        bottom: 1.5rem;
        bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
    }
}

/* Scrollbar Styling */
.tab-content-wrapper::-webkit-scrollbar {
    width: 8px;
}

.tab-content-wrapper::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.tab-content-wrapper::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.tab-content-wrapper::-webkit-scrollbar-thumb:hover {
    background: var(--text-color);
    opacity: 0.5;
}

/* Mobile-specific optimizations */
@media (max-width: 768px) {
    /* 防止手機端滾動時出現橡皮筋效果 */
    body {
        overscroll-behavior: none;
    }
    
    /* 優化觸摸目標大小 */
    .dpad-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* 防止方向鍵區域的滾動 */
    .dpad-container {
        overscroll-behavior: none;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Print Styles */
@media print {
    .settings-bar,
    .tab-nav,
    footer,
    .dpad-container,
    .modal {
        display: none !important;
    }
}

/* Loading Spinner */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    position: relative;
    width: 80px;
    height: 80px;
}

.loading-spinner svg {
    width: 100%;
    height: 100%;
    animation: rotate 2s linear infinite;
}

.loading-spinner .spinner-path {
    fill: none;
    stroke: var(--accent-color);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-dasharray: 150, 200;
    stroke-dashoffset: 0;
    animation: dash 1.5s ease-in-out infinite;
}

.loading-spinner .maze-path {
    fill: none;
    stroke: var(--accent-color);
    stroke-width: 2;
    stroke-linecap: round;
    opacity: 0.3;
}

@keyframes rotate {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes dash {
    0% {
        stroke-dasharray: 1, 200;
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dasharray: 89, 200;
        stroke-dashoffset: -35;
    }
    100% {
        stroke-dasharray: 89, 200;
        stroke-dashoffset: -124;
    }
}

/* Developer Tools Panel */
.dev-panel {
    position: fixed;
    top: 80px;
    right: -350px;
    width: 320px;
    background-color: var(--bg-color);
    border: 2px solid var(--accent-color);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    z-index: 9999;
    transition: right 0.3s ease;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.dev-panel-visible {
    right: 20px;
}

.dev-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--accent-color);
    color: white;
    border-radius: 10px 10px 0 0;
}

.dev-panel-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.dev-panel-close {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.dev-panel-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.dev-panel-content {
    padding: 16px;
}

.dev-control-group {
    margin-bottom: 16px;
}

.dev-control-group:last-child {
    margin-bottom: 0;
}

.dev-label {
    display: block;
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 500;
}

.dev-btn {
    width: 100%;
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 8px;
}

.dev-btn:last-child {
    margin-bottom: 0;
}

.dev-btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.dev-btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.dev-btn-secondary {
    background-color: #ef4444;
    color: white;
}

.dev-btn-secondary:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
}

.dev-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    margin: 8px 0;
    -webkit-appearance: none;
}

.dev-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    transition: transform 0.2s ease;
}

.dev-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.dev-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: none;
    transition: transform 0.2s ease;
}

.dev-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
}

.dev-value {
    display: inline-block;
    margin-left: 8px;
    font-weight: 600;
    color: var(--accent-color);
}

.dev-checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
}

.dev-checkbox {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.dev-status {
    margin-top: 12px;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    text-align: center;
    min-height: 20px;
}

.dev-status-info {
    background-color: #dbeafe;
    color: #1e40af;
}

.dev-status-success {
    background-color: #dcfce7;
    color: #15803d;
}

.dev-status-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.dev-status-error {
    background-color: #fee2e2;
    color: #991b1b;
}

/* Developer Toggle Button */
.dev-toggle-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 9998;
    transition: all 0.3s ease;
}

.dev-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.dev-toggle-btn:active {
    transform: scale(0.95);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .dev-panel {
        width: calc(100% - 40px);
        right: -100%;
        top: 60px;
    }
    
    .dev-panel-visible {
        right: 20px;
    }
    
    .dev-toggle-btn {
        bottom: 80px;
        right: 16px;
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
}