:root {
    --bg-gradient: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    --cell-bg: rgba(255, 255, 255, 0.1);
    --cell-bg-hover: rgba(255, 255, 255, 0.2);
    --cell-revealed: rgba(0, 0, 0, 0.2);
    
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    
    --primary-color: #00d2ff;
    --primary-color-hover: #3a7bd5;

    --success-color: #69f0ae;
    --danger-color: #ff5252;
    --val-1: #00d2ff;
    --val-2: #69f0ae;
    --val-3: #ff5252;
    --val-4: #b388ff;
    --val-5: #ffd740;
    --val-6: #00e5ff;
    --val-7: #ff4081;
    --val-8: #ffab40;

    --cell-size: 35px;
}

[data-theme="light"] {
    --bg-gradient: linear-gradient(135deg, #f5f7fa, #c3cfe2);
    --glass-bg: rgba(255, 255, 255, 0.4);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    
    --cell-bg: rgba(255, 255, 255, 0.5);
    --cell-bg-hover: rgba(255, 255, 255, 0.8);
    --cell-revealed: rgba(0, 0, 0, 0.05);
    
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    
    --primary-color: #3182ce;
    --primary-color-hover: #2b6cb0;
    
    --success-color: #276749;
    --danger-color: #c53030;
    --val-1: #1a365d;
    --val-2: #276749;
    --val-3: #c53030;
    --val-4: #2b6cb0;
    --val-5: #744210;
    --val-6: #285e61;
    --val-7: #97266d;
    --val-8: #c05621;
}

/* Responsive Cell Sizes */
@media (max-width: 900px) { :root { --cell-size: 28px; } }
@media (max-width: 768px) { :root { --cell-size: 24px; } }
@media (max-width: 480px) { :root { --cell-size: 20px; } }

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

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
    overflow-x: hidden;
    padding: 1rem;
    transition: background 0.5s ease, color 0.5s ease;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    width: 100%;
    max-width: 1000px;
}

.header {
    text-align: center;
    animation: fadeInDown 0.8s ease-out;
}

.header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: -webkit-linear-gradient(45deg, var(--primary-color), var(--primary-color-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: center;
}

select {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    outline: none;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

[data-theme="light"] select option {
    background: #f5f7fa;
    color: #2d3748;
}

select:hover, select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
}

select option {
    background: #203a43;
    color: white;
}

.glass-btn {
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.glass-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.glass-btn:hover:not(:disabled) {
    background: var(--primary-color-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(58, 123, 213, 0.4);
    border-color: transparent;
}

.glass-btn.primary {
    background: linear-gradient(45deg, var(--primary-color), var(--primary-color-hover));
    border: none;
    box-shadow: 0 4px 15px rgba(0, 210, 255, 0.3);
}

.glass-btn.primary:hover:not(:disabled) {
    box-shadow: 0 6px 20px rgba(0, 210, 255, 0.5);
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: clamp(1rem, 3vw, 2rem);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--glass-shadow);
    animation: zoomIn 0.5s ease-out;
    max-width: 100%;
    overflow: auto; /* Fallback for very small screens */
}

.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    font-family: 'Courier New', Courier, monospace;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 700;
    color: var(--danger-color);
    text-shadow: 0 0 10px rgba(255, 51, 102, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .status-bar {
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(0, 0, 0, 0.1);
    text-shadow: none;
}

.counter, .timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0,0,0,0.5);
    padding: 0.5rem clamp(0.5rem, 2vw, 1rem);
    border-radius: 8px;
    min-width: clamp(70px, 15vw, 100px);
    justify-content: center;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
}

[data-theme="light"] .counter, [data-theme="light"] .timer {
    background: rgba(255, 255, 255, 0.5);
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.1);
}

.counter .icon, .timer .icon {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    filter: drop-shadow(0 0 5px rgba(255,255,255,0.3));
}

#face-btn {
    font-size: clamp(2rem, 4vw, 2.5rem);
    background: none;
    border: none;
    cursor: pointer;
    transition: transform 0.1s, filter 0.3s;
    user-select: none;
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.2));
}

#face-btn:hover {
    filter: drop-shadow(0 0 15px rgba(255,255,255,0.5));
}

#face-btn:active {
    transform: scale(0.9);
}

.board {
    display: grid;
    gap: 2px;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: 10px;
    user-select: none;
    border: 1px solid var(--glass-border);
    margin: 0 auto;
    width: max-content;
}

[data-theme="light"] .board {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: calc(var(--cell-size) * 0.55);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: inset 1px 1px 3px rgba(255,255,255,0.2), inset -1px -1px 3px rgba(0,0,0,0.3);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .cell {
    background: linear-gradient(135deg, #ffffff, #e2e8f0);
    box-shadow: inset 1px 1px 2px #ffffff, inset -1px -1px 3px rgba(0,0,0,0.2);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: #2d3748;
}

.cell:hover:not(.revealed) {
    background: linear-gradient(135deg, rgba(255,255,255,0.25), rgba(255,255,255,0.1));
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3), inset 1px 1px 3px rgba(255,255,255,0.3);
    z-index: 1;
}

[data-theme="light"] .cell:hover:not(.revealed) {
    background: linear-gradient(135deg, #ffffff, #edf2f7);
    box-shadow: 0 2px 4px rgba(0,0,0,0.15), inset 1px 1px 3px #ffffff;
}

.cell:active:not(.revealed) {
    transform: translateY(1px);
    box-shadow: inset 2px 2px 5px rgba(0,0,0,0.4);
}

.cell.revealed {
    background: var(--cell-revealed);
    box-shadow: inset 2px 2px 6px rgba(0,0,0,0.6);
    border: 1px solid rgba(0, 0, 0, 0.3);
    cursor: default;
    transform: none;
}

[data-theme="light"] .cell.revealed {
    background: rgba(0, 0, 0, 0.05);
    box-shadow: inset 2px 2px 5px rgba(0,0,0,0.15);
    border: 1px solid rgba(0, 0, 0, 0.15);
}

.cell.bomb {
    background: rgba(255, 51, 102, 0.2);
    animation: pulse 1s infinite alternate;
}

.cell.flag {
    font-size: calc(var(--cell-size) * 0.6);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}

/* Color classes for numbers */
.val-1 { color: var(--val-1); text-shadow: 0 0 10px rgba(0, 210, 255, 0.6); }
.val-2 { color: var(--val-2); text-shadow: 0 0 10px rgba(105, 240, 174, 0.6); }
.val-3 { color: var(--val-3); text-shadow: 0 0 10px rgba(255, 82, 82, 0.6); }
.val-4 { color: var(--val-4); text-shadow: 0 0 10px rgba(179, 136, 255, 0.6); }
.val-5 { color: var(--val-5); text-shadow: 0 0 10px rgba(255, 215, 64, 0.6); }
.val-6 { color: var(--val-6); text-shadow: 0 0 10px rgba(0, 229, 255, 0.6); }
.val-7 { color: var(--val-7); text-shadow: 0 0 10px rgba(255, 64, 129, 0.6); }
.val-8 { color: var(--val-8); text-shadow: 0 0 10px rgba(255, 171, 64, 0.6); }

[data-theme="light"] [class^="val-"] {
    text-shadow: none;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 32, 39, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    visibility: visible;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme="light"] .modal {
    background: rgba(255, 255, 255, 0.7);
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal-content {
    text-align: center;
    min-width: 320px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transform: scale(1);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.hidden .modal-content {
    transform: scale(0.8) translateY(20px);
}

.modal-content h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.modal-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

#final-time {
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.4rem;
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
    from { box-shadow: inset 0 0 10px rgba(255, 51, 102, 0.5); }
    to { box-shadow: inset 0 0 25px rgba(255, 51, 102, 0.8), 0 0 15px rgba(255, 51, 102, 0.4); }
}

@keyframes explode {
    0% { transform: scale(1); background-color: var(--cell-revealed); }
    50% { transform: scale(1.3); background-color: #ff3366; box-shadow: 0 0 30px #ff3366; z-index: 10; }
    100% { transform: scale(1); background-color: rgba(255, 51, 102, 0.6); box-shadow: inset 0 0 15px rgba(255,0,0,0.8); }
}

.cell.exploded {
    animation: explode 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .game-container {
        padding: 0;
    }
    .glass-panel {
        border-radius: 12px;
        border-left: none;
        border-right: none;
    }
    .controls {
        flex-direction: column;
        width: 100%;
    }
    select, .glass-btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .status-bar {
        padding: 0.8rem;
    }
}

/* Footer */
.site-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 50;
}

.footer-center {
    font-size: 1.05rem;
    color: var(--text-secondary);
    pointer-events: auto;
}

.footer-center a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.footer-center a:hover {
    color: var(--primary-color-hover);
    text-shadow: 0 0 8px rgba(0, 210, 255, 0.4);
}

.footer-corner {
    position: fixed;
    bottom: 0.75rem;
    right: 1.5rem;
    font-size: 1rem;
    color: var(--text-secondary);
    pointer-events: auto;
}

.footer-corner a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.footer-corner a:hover {
    color: var(--primary-color-hover);
    text-shadow: 0 0 8px rgba(0, 210, 255, 0.4);
}

[data-theme="light"] .footer-center a:hover,
[data-theme="light"] .footer-corner a:hover {
    text-shadow: none;
}