:root {
    --primary: #4361ee;
    --primary-dark: #3a0ca3;
    --secondary: #7209b7;
    --success: #4cc9f0;
    --danger: #f72585;
    --warning: #f8961e;
    --info: #4895ef;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border-radius: 12px;
    --box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
    --gradient: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: white;
    padding: 20px 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: var(--dark);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

/* Botões */
.btn {
    padding: 12px 24px;
    border-radius: 50px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-size: 14px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
}

.btn-secondary {
    background: var(--light);
    color: var(--dark);
    border: 1px solid var(--gray-light);
}

.btn-secondary:hover {
    background: #e9ecef;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #e01e6c;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #3ab7d8;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-icon {
    padding: 10px;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    justify-content: center;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    text-align: center;
    background: var(--gradient);
    color: white;
    border-radius: var(--border-radius);
    margin: 40px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: cover;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 800;
}

.hero p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 30px;
}

/* Cards */
.audio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.audio-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
}

.audio-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.audio-card.expired {
    opacity: 0.7;
}

.audio-card.expired::after {
    content: 'Expirado';
    position: absolute;
    top: 15px;
    right: -30px;
    background: var(--danger);
    color: white;
    padding: 5px 30px;
    font-size: 12px;
    font-weight: bold;
    transform: rotate(45deg);
}

.card-header {
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.card-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.card-tag {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-top: 8px;
}

.card-body {
    padding: 20px;
}

.audio-player-wrapper {
    margin: 15px 0;
}

.audio-info {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--gray);
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--gray-light);
}

.audio-text {
    margin-top: 15px;
    padding: 15px;
    background: var(--light);
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.5;
}

/* Filtros */
.filter-section {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    margin: 30px 0;
    box-shadow: var(--box-shadow);
}

.search-box {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.search-input {
    flex: 1;
    padding: 15px;
    border: 2px solid var(--gray-light);
    border-radius: 50px;
    font-size: 16px;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-filter {
    padding: 8px 16px;
    background: var(--light);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.tag-filter:hover {
    background: var(--primary);
    color: white;
}

.tag-filter.active {
    background: var(--primary);
    color: white;
}

/* Admin */
.admin-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
    min-height: calc(100vh - 80px);
}

.sidebar {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 10px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    color: var(--dark);
    text-decoration: none;
    border-radius: 10px;
    transition: var(--transition);
}

.sidebar-nav a:hover {
    background: var(--light);
}

.sidebar-nav a.active {
    background: var(--primary);
    color: white;
}

.admin-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--light);
    padding: 25px;
    border-radius: var(--border-radius);
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--gray);
    font-size: 14px;
}

/* Formulários */
.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--gray-light);
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.file-upload {
    border: 2px dashed var(--gray-light);
    border-radius: 10px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.file-upload:hover {
    border-color: var(--primary);
    background: rgba(67, 97, 238, 0.05);
}

.file-upload input[type="file"] {
    display: none;
}

.file-info {
    margin-top: 15px;
    font-size: 14px;
    color: var(--gray);
}

/* Tabela */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-light);
}

.data-table th {
    background: var(--light);
    font-weight: 600;
    color: var(--dark);
}

.data-table tr:hover {
    background: rgba(67, 97, 238, 0.05);
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-active {
    background: #d4edda;
    color: #155724;
}

.status-expired {
    background: #f8d7da;
    color: #721c24;
}

/* Player Customizado */
.custom-player {
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    margin: 30px 0;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.play-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.play-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--gray-light);
    border-radius: 3px;
    position: relative;
    cursor: pointer;
}

.progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    width: 0%;
}

.time-display {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--gray);
    margin-top: 10px;
}

/* Mensagens */
.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray);
}

/* Responsividade */
@media (max-width: 992px) {
    .audio-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    
    .admin-container {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .audio-grid {
        grid-template-columns: 1fr;
    }
}

/* Animações */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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