/* ===== TABLEAU PÉRIODIQUE MODERNE ===== */

/* Hero section spécifique */
.hero-periodic {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.hero-periodic::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(1deg); }
    66% { transform: translateY(10px) rotate(-1deg); }
}

.hero-periodic .hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(45deg, #fff, #f0f8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.hero-periodic .hero-title i {
    color: #ffd700;
    margin-right: var(--spacing-4);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.hero-periodic .hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--spacing-8);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* Section de recherche */
.search-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: var(--spacing-12) 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

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

.search-box {
    position: relative;
    margin-bottom: var(--spacing-8);
}

.search-box input {
    width: 100%;
    padding: var(--spacing-5) var(--spacing-16);
    border: 3px solid rgba(148, 163, 184, 0.3);
    border-radius: 20px;
    font-size: 1.125rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.search-box input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 
        0 0 0 4px rgba(59, 130, 246, 0.1),
        0 20px 25px -5px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 1);
    transform: translateY(-2px);
}

.search-box i {
    position: absolute;
    left: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
    font-size: var(--text-lg);
}

.clear-btn {
    position: absolute;
    right: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.clear-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.search-filters {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
    justify-content: center;
}

.filter-select {
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-md);
    background: var(--white);
    font-size: var(--text-sm);
    min-width: 150px;
}

/* Section du tableau périodique */
.periodic-section {
    padding: var(--spacing-16) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.periodic-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.periodic-header h2 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(45deg, #1e293b, #475569);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-6);
}

.periodic-header p {
    font-size: 1.25rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.periodic-table-container {
    overflow-x: auto;
    margin-bottom: var(--spacing-12);
    padding: var(--spacing-6);
    background: rgba(255, 255, 255, 0.8);
    border-radius: 24px;
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);
    backdrop-filter: blur(10px);
}

.periodic-table {
    display: grid;
    grid-template-columns: repeat(18, 1fr);
    gap: 3px;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-6);
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    border-radius: 20px;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

/* Éléments du tableau */
.element {
    aspect-ratio: 1;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: var(--spacing-2);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.element::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.element:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);
    z-index: 10;
    border-color: rgba(59, 130, 246, 0.5);
}

.element:hover::before {
    opacity: 1;
}

.element.selected {
    border-color: #3b82f6;
    box-shadow: 
        0 0 0 4px rgba(59, 130, 246, 0.2),
        0 20px 25px -5px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.element-number {
    position: absolute;
    top: 2px;
    left: 4px;
    font-size: var(--text-xs);
    color: var(--gray-600);
    font-weight: 500;
}

.element-symbol {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2px;
}

.element-name {
    font-size: var(--text-xs);
    color: var(--gray-600);
    line-height: 1.2;
}

.element-mass {
    position: absolute;
    bottom: 2px;
    right: 4px;
    font-size: var(--text-xs);
    color: var(--gray-500);
}

/* Couleurs par famille - Design moderne */
.element.alkali-metals { 
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.element.alkaline-earth { 
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.element.transition-metals { 
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.element.post-transition { 
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.element.metalloids { 
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.element.nonmetals { 
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.element.noble-gases { 
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #1f2937;
    text-shadow: 0 1px 2px rgba(255,255,255,0.3);
}
.element.lanthanides { 
    background: linear-gradient(135deg, #78716c 0%, #57534e 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.element.actinides { 
    background: linear-gradient(135deg, #92400e 0%, #78350f 100%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

/* Éléments spécifiques */
.element.hydrogen { 
    background: linear-gradient(135deg, #fecaca 0%, #fca5a5 100%);
    color: #991b1b;
    text-shadow: 0 1px 2px rgba(255,255,255,0.5);
}
.element.helium { 
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    text-shadow: 0 1px 2px rgba(255,255,255,0.5);
}

/* Espaces vides dans le tableau */
.element.empty {
    background: transparent;
    border: none;
    cursor: default;
}

.element.empty:hover {
    transform: none;
    box-shadow: none;
}

/* Légende */
.periodic-legend {
    background: var(--gray-50);
    padding: var(--spacing-6);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-200);
}

.periodic-legend h3 {
    text-align: center;
    margin-bottom: var(--spacing-4);
    color: var(--gray-800);
}

.legend-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--gray-300);
}

.legend-color.alkali-metals { background: #ff6b6b; }
.legend-color.alkaline-earth { background: #ffa726; }
.legend-color.transition-metals { background: #42a5f5; }
.legend-color.post-transition { background: #66bb6a; }
.legend-color.metalloids { background: #ab47bc; }
.legend-color.nonmetals { background: #26c6da; }
.legend-color.noble-gases { background: #ffd54f; }
.legend-color.lanthanides { background: #8d6e63; }
.legend-color.actinides { background: #795548; }

/* Section détails de l'élément */
.element-details-section {
    padding: var(--spacing-12) 0;
    background: var(--gray-50);
}

.element-details {
    max-width: 800px;
    margin: 0 auto;
}

.element-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.element-header h2 {
    font-size: var(--text-2xl);
    color: var(--gray-900);
    margin-bottom: var(--spacing-4);
}

.element-header p {
    color: var(--gray-600);
}

.element-info {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-8);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.element-basic-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.info-item {
    text-align: center;
    padding: var(--spacing-4);
    background: var(--gray-50);
    border-radius: var(--border-radius-md);
}

.info-label {
    font-size: var(--text-sm);
    color: var(--gray-600);
    margin-bottom: var(--spacing-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--gray-900);
}

.element-properties {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
}

.property-group {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-4);
}

.property-group h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-4);
    font-size: var(--text-lg);
}

.property-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-2) 0;
    border-bottom: 1px solid var(--gray-100);
}

.property-item:last-child {
    border-bottom: none;
}

.property-name {
    color: var(--gray-700);
    font-weight: 500;
}

.property-value {
    color: var(--gray-900);
    font-weight: 600;
}

/* Section applications industrielles */
.applications-section {
    padding: var(--spacing-16) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.applications-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.applications-header h2 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(45deg, #1e293b, #475569);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-6);
}

.applications-header p {
    font-size: 1.25rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
    max-width: 1200px;
    margin: 0 auto;
}

.application-card {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(148, 163, 184, 0.2);
    border-radius: 24px;
    padding: var(--spacing-8);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.application-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(147, 51, 234, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.application-card:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}

.application-card:hover::before {
    opacity: 1;
}

.application-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-6);
    box-shadow: 
        0 10px 15px -3px rgba(59, 130, 246, 0.4),
        0 4px 6px -2px rgba(59, 130, 246, 0.2);
    transition: all 0.3s ease;
}

.application-card:hover .application-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 
        0 20px 25px -5px rgba(59, 130, 246, 0.4),
        0 10px 10px -5px rgba(59, 130, 246, 0.2);
}

.application-icon i {
    font-size: 2rem;
    color: white;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.application-card h3 {
    color: #1e293b;
    margin-bottom: var(--spacing-4);
    font-size: 1.5rem;
    font-weight: 700;
}

.application-card p {
    color: #64748b;
    line-height: 1.7;
    font-size: 1.125rem;
}

/* Responsive design */
@media (max-width: 1200px) {
    .periodic-table {
        grid-template-columns: repeat(18, 1fr);
        gap: 1px;
        padding: var(--spacing-2);
    }
    
    .element {
        padding: var(--spacing-1);
    }
    
    .element-symbol {
        font-size: var(--text-sm);
    }
    
    .element-name {
        font-size: var(--text-xs);
    }
}

@media (max-width: 768px) {
    .periodic-table {
        grid-template-columns: repeat(9, 1fr);
        gap: 1px;
        padding: var(--spacing-2);
    }
    
    .element {
        padding: var(--spacing-1);
    }
    
    .element-symbol {
        font-size: var(--text-sm);
    }
    
    .element-name {
        font-size: var(--text-xs);
        display: none;
    }
    
    .search-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-select {
        min-width: 200px;
    }
    
    .applications-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .periodic-table {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .hero-actions {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    
    .legend-items {
        grid-template-columns: 1fr;
    }
}