/* /assets/css/style.css */

:root {
    /* Color Palette */
    --primary-color: #003366; /* Adjust to SDMIT brand blue */
    --primary-hover: #002244;
    --text-main: #1d1d1f;
    --text-muted: #86868b;
    --bg-page: #f5f5f7;
    --bg-surface: #ffffff;
    --border-color: #d2d2d7;
    
    /* Spacing & Layout */
    --nav-height: 72px;
    --container-width: 1200px;
    --spacing-sm: 0.5rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* Fluid Animation Tokens */
    --transition-fast: 150ms ease-out;
    --transition-spring: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Accessibility: Reduced Transparency Fallback */
@media (prefers-reduced-transparency: reduce) {
    :root {
        --bg-translucent: var(--bg-surface);
    }
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-top: var(--nav-height); /* Offset for fixed header */
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}
/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em; /* Negative tracking for large text */
    font-optical-sizing: auto;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(2rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-main);
    font-size: 1rem;
}

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

a:hover { color: var(--primary-hover); }
/* Header & Navigation */
.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-weight: 500;
    color: var(--text-main);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--primary-color);
}
/* Core Structural Layouts */
.page-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

.content-block {
    margin-bottom: var(--spacing-xl);
}

/* Grid Systems */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.split-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .split-grid {
        grid-template-columns: 2fr 1fr; /* 66% Main / 33% Sidebar */
    }
}
/* Cards */
.profile-card, .news-card, .facility-card {
    background: var(--bg-surface);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: transform var(--transition-spring), box-shadow var(--transition-spring);
    will-change: transform;
}

/* Instant feedback on pointer-down */
.profile-card:active, .news-card:active, .btn-primary:active {
    transform: scale(0.97);
}

.profile-image img, .news-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.profile-info, .news-content {
    padding: var(--spacing-md);
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.btn-primary:hover {
    background: var(--primary-hover);
    color: #fff;
}
/* Mobile Menu Closed State (Default for Mobile) */
.nav-links {
    transition: transform var(--transition-spring), opacity var(--transition-fast);
}

/* Material weight encodes hierarchy: add deeper shadow on scroll */
.site-header {
    transition: box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.site-header.header-scrolled {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    background: rgba(255, 255, 255, 0.85); /* Slightly more opaque for legibility */
}

/* Mobile responsive handling */
@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 8px 24px rgba(0,0,0,0.1);
        
        /* Hide by translating up and fading out */
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        visibility: hidden;
    }

    /* Active State triggered by JS */
    .nav-links.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
        visibility: visible;
    }
}
/* Footer Layout */
.site-footer {
    background-color: var(--primary-color);
    color: #ffffff;
    padding-top: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    border-top: 4px solid var(--primary-hover);
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md) var(--spacing-xl);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-col h3 {
    color: #ffffff;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: #ffffff;
    opacity: 0.5;
}

/* Footer Links */
.links-col ul, .contact-list {
    list-style: none;
}

.links-col li {
    margin-bottom: 0.75rem;
}

.links-col a, .contact-list a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.links-col a:hover, .contact-list a:hover {
    color: #ffffff;
}

/* Social Media Icons */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: var(--spacing-md);
}

.social-links img {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(1); /* Makes SVG icons white */
    opacity: 0.8;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    will-change: transform;
}

/* Immediate active state feedback[cite: 1] */
.social-links a:active img {
    transform: scale(0.9);
}

.social-links a:hover img {
    opacity: 1;
}

/* Bottom Bar */
.footer-bottom {
    background-color: var(--primary-hover);
    padding: var(--spacing-md) 0;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.bottom-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

@media (max-width: 768px) {
    .bottom-container {
        flex-direction: column;
        text-align: center;
    }
}
/* Homepage Specific Layouts */
.hero-section {
    background-image: linear-gradient(rgba(0, 51, 102, 0.8), rgba(0, 51, 102, 0.8)), url('/assets/images/campus/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    color: #ffffff;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: calc(var(--nav-height) * -1); /* Pull up under transparent header */
    padding-top: calc(var(--nav-height) + var(--spacing-xl));
}

.hero-content h1 {
    color: #ffffff;
    margin-bottom: var(--spacing-sm);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-md);
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    border: 2px solid #ffffff;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.btn-secondary:hover {
    background: #ffffff;
    color: var(--primary-color);
}

/* Statistics Bar */
.statistics-bar {
    background: var(--primary-hover);
    color: #ffffff;
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
}

.stat-box h2 {
    color: #ffffff;
    font-size: 2.5rem;
    margin-bottom: 0.25rem;
}

/* Utilities */
.text-center { text-align: center; }
.bg-light { background-color: #f9f9fb; padding: var(--spacing-lg); border-radius: 12px; }
.align-center { align-items: center; }

/* Tag Cloud for Departments */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}
.tag-cloud a {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: transform var(--transition-spring), border-color var(--transition-fast);
}
.tag-cloud a:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}