:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --card-bg: rgba(22, 27, 34, 0.6);
    --card-border: rgba(255, 255, 255, 0.1);
    --highlight: #58a6ff;
    --primary: #2ea043;
    --secondary: #21262d;
    --cell-bg: #161b22;
    --cell-border: #30363d;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 2rem;
    display: flex;
    justify-content: center;
    background: radial-gradient(circle at top right, #1f2937, #0d1117);
    overflow-x: hidden;
}

.app-container {
    max-width: 1400px;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.highlight {
    color: var(--highlight);
    background: linear-gradient(90deg, #58a6ff, #bd56ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    font-size: 1.1rem;
    opacity: 0.8;
    margin-bottom: 2rem;
}

.controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    width: fit-content;
    margin: 0 auto;
}

input[type="text"] {
    background: var(--cell-bg);
    border: 1px solid var(--cell-border);
    color: white;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="text"]:focus {
    border-color: var(--highlight);
}

input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 2px solid var(--cell-border);
    border-radius: 8px;
}

.btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s, background 0.2s;
}

.primary-btn {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(46, 160, 67, 0.3);
}

.primary-btn:hover {
    background-color: #38c253;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46, 160, 67, 0.4);
}

.secondary-btn {
    background-color: var(--secondary);
    color: white;
    border: 1px solid var(--cell-border);
}

.secondary-btn:hover {
    background-color: var(--cell-border);
    transform: translateY(-2px);
}

.boards-container {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    perspective: 1000px;
}

.glass-panel {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.player-card {
    border-radius: 20px;
    padding: 1.5rem;
    width: 640px;
    animation: zoomIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    transition: transform 0.3s ease;
}

.player-card:hover {
    transform: translateY(-5px) rotateX(2deg) rotateY(-2deg);
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--card-border);
}

.player-name {
    font-size: 1.5rem;
    font-weight: 600;
}

.remove-player-btn {
    background: transparent;
    border: none;
    color: #f85149;
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
    opacity: 0.6;
    transition: opacity 0.2s, transform 0.2s;
}

.remove-player-btn:hover {
    opacity: 1;
    transform: scale(1.1) rotate(90deg);
}

.bingo-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 1.5rem;
}

.bingo-cell {
    aspect-ratio: 1;
    background: var(--cell-bg);
    border: 2px solid var(--cell-border);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--text-color);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    position: relative;
    overflow: hidden;
}

.bingo-cell::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.bingo-cell:hover:not(.checked) {
    border-color: rgba(255, 255, 255, 0.5);
    background: var(--secondary);
    transform: scale(1.05);
    z-index: 10;
}

.bingo-cell.checked {
    /* Color dinámico aplicado por JS */
    color: white;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    box-shadow: inset 0 3px 6px rgba(0, 0, 0, 0.3);
}

.bingo-cell.checked::before {
    width: 150%;
    height: 150%;
}

.bingo-cell.winning-cell {
    text-decoration: line-through;
    text-decoration-thickness: 3px;
    text-decoration-color: rgba(255, 255, 255, 0.8);
    opacity: 0.8;
    transform: scale(0.92);
    box-shadow: inset 0 5px 15px rgba(0, 0, 0, 0.5);
    animation: winPulse 1.5s ease;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes winPulse {
    0% {
        transform: scale(0.95);
    }

    50% {
        transform: scale(1.05);
        color: white;
        text-decoration-color: white;
    }

    100% {
        transform: scale(0.92);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

.player-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.progress-bar {
    flex-grow: 1;
    height: 8px;
    background: var(--cell-bg);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    border-radius: 4px;
    background: var(--highlight);
    transition: width 0.4s ease, background-color 0.4s ease;
}

.progress-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    min-width: 40px;
    text-align: right;
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 1rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.hidden {
    opacity: 0;
    transform: translate(-50%, 20px);
    pointer-events: none;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    header {
        margin-bottom: 1.5rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    .controls {
        flex-direction: column;
        width: 100%;
        padding: 1rem;
    }

    .controls input[type="text"],
    .controls .btn {
        width: 100%;
    }

    .boards-container {
        gap: 1rem;
    }

    .player-card {
        width: 100%;
        max-width: 400px;
        padding: 1rem;
    }

    .bingo-grid {
        gap: 4px;
    }

    .bingo-cell {
        font-size: 0.8rem;
        padding: 0.2rem;
        border-width: 1px;
    }
}