/* ==========================================================================
   Meera College - Premium Design System (Vanilla CSS)
   ========================================================================== */

/* 1. Variables & Design Tokens */
:root {
    /* Colors */
    --color-primary: #0f172a;      /* Deep Navy */
    --color-primary-light: #1e293b;
    --color-secondary: #b45309;    /* Deep Gold/Amber */
    --color-secondary-light: #fbbf24;
    --color-accent: #059669;       /* Emerald */
    --color-accent-light: #34d399;
    --color-danger: #e11d48;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-500: #64748b;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Typography */
    --font-heading: 'Outfit', 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', 'Plus Jakarta Sans', sans-serif;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;

    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-premium: 0 30px 60px -12px rgba(15, 23, 42, 0.25);
    --shadow-glow: 0 0 20px rgba(251, 191, 36, 0.4);
    
    /* Border Radius */
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-pill: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 2. Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 3. Layout & Grid */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
}

.grid {
    display: grid;
    gap: var(--space-8);
}
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* 4. Typography Utilities */
.text-center { text-align: center; }
.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.font-black { font-weight: 900; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-3xl { font-size: 2rem; }
.text-5xl { font-size: 3rem; }
.text-7xl { font-size: 4.5rem; letter-spacing: -0.02em; }
.uppercase { text-transform: uppercase; }
.tracking-widest { letter-spacing: 0.1em; }

/* 5. Buttons & Interactive Elements */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: all var(--transition-bounce);
    border: none;
    gap: var(--space-2);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}
.btn-primary:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-premium);
}

.btn-secondary {
    background-color: var(--color-secondary-light);
    color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}
.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-premium);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--color-gray-200);
    color: var(--color-gray-800);
}
.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* 6. Navigation (Header) */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: var(--space-4) 0;
    transition: all var(--transition-normal);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-primary);
    font-family: var(--font-heading);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--color-secondary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}
.nav-links {
    display: flex;
    gap: var(--space-8);
    align-items: center;
}
.nav-link {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-gray-500);
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--color-secondary-light);
    transition: width var(--transition-normal);
}
.nav-link:hover { color: var(--color-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--color-primary); }

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-primary);
}
.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-white);
    padding: var(--space-6);
    box-shadow: var(--shadow-xl);
    flex-direction: column;
    gap: var(--space-4);
    border-top: 1px solid var(--color-gray-100);
}
.mobile-menu.show {
    display: flex;
}

/* 7. UI Components (Cards, Glassmorphism) */
.card {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-bounce);
    border: 1px solid var(--color-gray-100);
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-premium);
    border-color: var(--color-gray-200);
}

.glass-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    color: var(--color-white);
    transition: transform var(--transition-bounce);
}
.glass-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.15);
}

/* 8. Hero Section (Dynamic & Premium) */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background-color: var(--color-primary);
    overflow: hidden;
    color: var(--color-white);
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1541339907198-e08756ebafe3?auto=format&fit=crop&q=80&w=2000');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
    z-index: 1;
}
/* Abstract gradient blobs */
.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 2;
    opacity: 0.5;
    animation: blob-float 10s infinite alternate ease-in-out;
}
.hero-blob-1 { top: -10%; left: -10%; width: 500px; height: 500px; background: #3b82f6; }
.hero-blob-2 { bottom: -20%; right: -10%; width: 600px; height: 600px; background: var(--color-secondary-light); animation-delay: 2s; }

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-6);
    backdrop-filter: blur(10px);
}
.pulse-dot {
    width: 8px; height: 8px;
    background-color: var(--color-accent-light);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}
@keyframes blob-float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, -50px) scale(1.1); }
}

/* 9. Forms (Premium Experience) */
.form-group {
    margin-bottom: var(--space-6);
    position: relative;
}
.form-control {
    width: 100%;
    padding: var(--space-4);
    background: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-gray-900);
    transition: all var(--transition-normal);
}
.form-control:focus {
    outline: none;
    border-color: var(--color-secondary-light);
    background: var(--color-white);
    box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.1);
}
textarea.form-control {
    min-height: 150px;
    resize: vertical;
}
.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 700;
    color: var(--color-primary);
    font-size: 0.875rem;
}

/* 10. Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-16) 0 var(--space-8);
    border-top: 5px solid var(--color-secondary-light);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}
.footer-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-4);
    color: var(--color-secondary-light);
}
.footer-links li { margin-bottom: var(--space-2); }
.footer-links a:hover { color: var(--color-secondary-light); }
.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

/* 11. Media Queries */
@media (max-width: 1024px) {
    .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
    .text-7xl { font-size: 3.5rem; }
    .text-5xl { font-size: 2.5rem; }
}

@media (max-width: 768px) {
    .grid-cols-2, .grid-cols-3, .grid-cols-4, .footer-grid {
        grid-template-columns: 1fr !important;
    }
    .nav-links { display: none; }
    .hamburger { display: block; }
    .hero { min-height: 80vh; text-align: center; }
    .hero-content { margin: 0 auto; display: flex; flex-direction: column; align-items: center; }
    
    /* Typography Scaling for Mobile */
    .text-7xl { font-size: 2.5rem !important; }
    .text-5xl { font-size: 2rem !important; }
    .text-4xl { font-size: 1.75rem !important; }
    .text-3xl { font-size: 1.5rem !important; }
    
    .section { padding: var(--space-12) 0; }
    
    /* Flexbox Mobile fixes */
    .flex { flex-direction: column; text-align: center; }
    .flex.gap-4, .flex.gap-6 { gap: var(--space-4); }
    .btn { width: 100%; margin-bottom: var(--space-2); }
    
    /* About Us specific mobile fixes */
    .card .grid-cols-2 { display: flex; flex-direction: column; }
    
    /* Nav Mobile */
    .mobile-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--color-white);
        box-shadow: var(--shadow-md);
        display: none;
        flex-direction: column;
        z-index: 100;
        padding: var(--space-4);
    }
    .mobile-menu.show { display: flex; }
    .mobile-menu a { padding: var(--space-4); border-bottom: 1px solid var(--color-gray-100); color: var(--color-primary); font-weight: bold; text-align: center; }
}

/* Utilities */
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mt-8 { margin-top: var(--space-8); }
.text-slate-500 { color: var(--color-gray-500); }
.text-secondary { color: var(--color-secondary-light); }
.bg-white { background-color: var(--color-white); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

img { image-rendering: high-quality; }