/* Casa Alta Tenerife - Premium Design System */

/* ========== GLOBAL TYPOGRAPHY & BASE ========== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-blue: #1e40af;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1e3a8a;
    --accent-orange: #f59e0b;
    --accent-orange-dark: #d97706;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-light: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    background: var(--bg-white);
    overflow-x: hidden;
}

/* ========== ENHANCED NAVIGATION ========== */
.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.main-nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
}

.nav-menu a {
    position: relative;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-orange);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.lang-selector a {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    font-weight: 600;
}

.lang-selector a:hover {
    background: var(--primary-blue-light);
    color: white;
    transform: translateY(-1px);
}

.lang-selector a.active {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-md);
}

/* ========== PREMIUM SECTIONS ========== */

/* LAU Info Grid */
.lau-info {
    background: linear-gradient(135deg, var(--bg-light) 0%, #f1f5f9 100%);
    padding: var(--spacing-2xl) 0;
}

.lau-info h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    line-height: 1.2;
}

.lau-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.lau-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.lau-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-orange));
}

.lau-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.lau-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.lau-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Apartments Grid Premium */
.apartments {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

.apartments h2 {
    font-size: 2.75rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.apt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.apt-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-light);
    position: relative;
}

.apt-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
}

.apt-image {
    transition: transform 0.5s ease;
}

.apt-card:hover .apt-image {
    transform: scale(1.05);
}

.apt-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
}

.apt-card p {
    margin: 0 var(--spacing-md) var(--spacing-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

.apt-card p:has(strong) {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

.apt-features {
    list-style: none;
    margin: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.apt-features li {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.apt-features li::before {
    content: '✨';
    margin-right: var(--spacing-xs);
    font-size: 0.8rem;
}

/* Services Premium */
.services {
    background: linear-gradient(135deg, var(--bg-light) 0%, #f1f5f9 100%);
    padding: var(--spacing-2xl) 0;
}

.services h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.service-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.service-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.service-item h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.service-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Calendar Section */
.calendar-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

.calendar-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

#calendar-container {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.calendar-legend {
    justify-content: center;
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.legend-item {
    gap: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

/* Contact Form Premium */
.contact-section {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 80px 0;
}

.contact-section h2 {
    font-size: 2.75rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 48px;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background: #ffffff;
    padding: 48px;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, #1e40af, #f59e0b, #3b82f6);
    border-radius: 24px 24px 0 0;
}

.form-group {
    margin-bottom: 32px;
}

.form-group label {
    display: block;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 12px;
    font-size: 1rem;
    letter-spacing: 0.025em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 16px 20px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #ffffff;
    color: #1f2937;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1), 0 1px 3px rgba(0, 0, 0, 0.1);
    outline: none;
    transform: translateY(-1px);
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: #9ca3af;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.form-group select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 16px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 48px;
    appearance: none;
}

.submit-btn {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border: none;
    border-radius: 12px;
    padding: 18px 36px;
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 15px -3px rgba(245, 158, 11, 0.4);
    width: 100%;
    letter-spacing: 0.025em;
    font-family: 'Inter', sans-serif;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(245, 158, 11, 0.4);
    background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
}

.submit-btn:active {
    transform: translateY(0);
}

/* Form validation styles */
.form-group input:invalid:not(:placeholder-shown),
.form-group textarea:invalid:not(:placeholder-shown),
.form-group select:invalid {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group input:valid,
.form-group textarea:valid,
.form-group select:valid {
    border-color: #10b981;
}

/* Placeholder styles */
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9ca3af;
    font-style: italic;
}

/* Form grid for larger screens */
@media (min-width: 768px) {
    .form-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
}

/* Mobile form adjustments */
@media (max-width: 768px) {
    .contact-form {
        margin: 0 16px;
        padding: 32px 24px;
        border-radius: 16px;
    }
    
    .contact-section h2 {
        font-size: 2rem;
        margin-bottom: 32px;
    }
    
    .form-group {
        margin-bottom: 24px;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 14px 16px;
    }
    
    .submit-btn {
        padding: 16px 32px;
    }
}

/* Footer Premium */
.site-footer {
    background: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-info {
    margin-bottom: var(--spacing-lg);
}

.footer-info p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.9;
}

.footer-links {
    margin-bottom: var(--spacing-lg);
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 var(--spacing-md);
    opacity: 0.8;
    transition: opacity 0.3s ease;
    font-weight: 500;
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer-copy {
    opacity: 0.7;
    font-size: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-md);
}

/* WhatsApp Button Premium */
.whatsapp-float {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: linear-gradient(135deg, #25d366 0%, #20ba5a 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 50px;
    text-decoration: none;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.95rem;
}

.whatsapp-float:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    color: white;
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 768px) {
    .apt-grid { grid-template-columns: 1fr; }
    .lau-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    
    .apt-card, .lau-card, .service-item {
        margin: 0 var(--spacing-sm);
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .apartments h2, .lau-info h2, .services h2, .calendar-section h2, .contact-section h2 {
        font-size: 2rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .whatsapp-float {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lau-card, .apt-card, .service-item {
    animation: fadeInUp 0.6s ease-out;
}

/* ========== PERFORMANCE ========== */
* {
    will-change: auto;
}

.apt-image, .service-item img {
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-white: #1f2937;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --bg-light: #374151;
        --border-light: #4b5563;
    }
}

/* Print styles */
@media print {
    .whatsapp-float, .contact-section, .site-footer { display: none; }
    .hero { color: black; background: white; }
    * { box-shadow: none !important; }
}