/* 
   Escuela 175 "General San Martín" 
   Modern Design System
*/

:root {
    /* Color Palette - Argentina Institutional */
    --primary: #0077C8; /* Institutional Blue */
    --primary-light: #74ACDF; /* Argentine Light Blue */
    --primary-dark: #005691;
    --secondary: #2D3748; /* Slate / Charcoal for text */
    --accent: #FFB81C; /* Subtle Sun Gold for highlights */
    --bg-white: #FFFFFF;
    --bg-gray: #F8FAFC;
    --text-main: #1A202C;
    --text-muted: #4A5568;
    --border-color: #E2E8F0;
    
    /* Spacing & Borders */
    --section-padding: 5rem 10%;
    --border-radius: 12px;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Outfit', sans-serif;
    color: var(--secondary);
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-padding);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-light);
    border-radius: 2px;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    transition: var(--transition);
}

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

.logo-area {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-area h1 {
    font-size: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Desktop Nav */
nav ul {
    display: flex;
    gap: 2rem;
}

nav ul li a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--secondary);
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--secondary);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: 80vh;
    background: linear-gradient(rgba(0, 119, 200, 0.7), rgba(0, 86, 145, 0.7)), url('assets/images/hero.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 70px;
}

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: white;
}

.hero-content p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.btn-primary {
    background: var(--bg-white);
    color: var(--primary-dark);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* History Timeline */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-item {
    padding: 2rem;
    border-left: 2px solid var(--primary-light);
    position: relative;
    margin-left: 20px;
    transition: var(--transition);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -9px;
    top: 2.5rem;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
}

.timeline-year {
    font-weight: 800;
    color: var(--primary);
    font-size: 1.2rem;
}

/* Cards Section */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.card i {
    font-size: 2.5rem;
    color: var(--primary-light);
    margin-bottom: 1.5rem;
}

/* Gallery Section */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 200px));
    justify-content: center;
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    aspect-ratio: 1;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-item .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: white;
    font-size: 0.8rem;
    transform: translateY(100%);
    transition: var(--transition);
}

.gallery-item:hover .overlay {
    transform: translateY(0);
}

/* Lightbox Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    padding: 40px;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
}

.modal-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: var(--border-radius);
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
    transform: scale(0.9);
    transition: var(--transition);
}

.modal.active .modal-content {
    transform: scale(1);
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
}

.modal-caption {
    position: absolute;
    bottom: 20px;
    color: white;
    font-size: 1.2rem;
    text-align: center;
}

.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    transition: var(--transition);
}

.modal-nav:hover {
    background: rgba(255, 255, 255, 0.3);
}

.modal-prev {
    left: 20px;
}

.modal-next {
    right: 20px;
}

/* Contact Footer */
footer {
    background: var(--secondary);
    color: white;
    padding: 4rem 10% 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: var(--primary-light);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .section {
        padding: 3rem 5%;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .menu-toggle {
        display: flex;
    }

    nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        padding: 2rem;
        border-bottom: 1px solid var(--border-color);
        display: none;
        flex-direction: column;
        align-items: center;
        box-shadow: var(--shadow-lg);
    }

    nav.active {
        display: flex;
    }

    nav ul {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
}