/* 
    TGIS Premium Multi-Page Design System
    Colors: Purple (#6d3596), Green (#97d77b), Yellow (#fccb0c) 
*/

:root {
    --primary: #6d3596;
    --primary-dark: #4d236d;
    --secondary: #97d77b;
    --accent: #fccb0c;
    --dark: #1a1a1a;
    --light: #f4f7f6;
    --white: #ffffff;
    --gray: #777;
    --glass: rgba(255, 255, 255, 0.1);
    --glass-solid: rgba(255, 255, 255, 0.95);
    
    --font-main: 'Raleway', sans-serif;
    --font-heading: 'Dosis', sans-serif;
    
    --transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    --shadow: 0 20px 50px rgba(0,0,0,0.05);
    --nav-height: 100px;
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    background-color: var(--white);
    color: var(--dark);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .container { padding: 0 20px; }
}

/* Preloader */
#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.loader-content { text-align: center; }
.logo-anim { font-size: 3rem; font-family: var(--font-heading); margin-bottom: 20px; animation: float 2s infinite ease-in-out; }
.progress-container { width: 250px; height: 3px; background: rgba(255,255,255,0.1); border-radius: 5px; overflow: hidden; margin: 0 auto; }
#progress { height: 100%; width: 0%; background: var(--accent); transition: width 0.3s ease; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: 100px;
    display: flex;
    align-items: center;
    z-index: 1000;
    transition: var(--transition);
}

nav.scrolled {
    background: var(--glass-solid);
    backdrop-filter: blur(20px);
    height: 80px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    background: var(--accent);
    padding: 12px;
    border-radius: 12px;
    z-index: 1002;
    transition: var(--transition);
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -7px); }

.logo img {
    height: 60px;
    transition: var(--transition);
}

nav.scrolled .logo img { height: 50px; }

.nav-links { display: flex; gap: 35px; align-items: center; }

.nav-links a {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--dark);
    position: relative;
    padding: 5px 0;
}

nav:not(.scrolled) .nav-links a { color: white; }
.dark-nav .nav-links a { color: var(--dark) !important; }

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

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

.nav-cta {
    background: var(--accent);
    color: var(--dark) !important;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 800 !important;
    box-shadow: 0 15px 30px rgba(252, 203, 12, 0.3);
}

.nav-cta:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(252, 203, 12, 0.4); }

/* Common Sections */
.section-padding { padding: 140px 0; }
.bg-light { background-color: var(--light); }
.bg-primary { background-color: var(--primary); color: white; }

.sec-tag { font-weight: 800; color: var(--primary); text-transform: uppercase; letter-spacing: 4px; display: block; margin-bottom: 15px; font-size: 0.9rem; }
.sec-title { font-size: 4rem; margin-bottom: 25px; line-height: 1.1; color: var(--dark); }
.bg-primary .sec-tag { color: var(--accent); }
.bg-primary .sec-title { color: white; }

/* Buttons */
.btn { display: inline-block; padding: 18px 45px; border-radius: 50px; font-weight: 700; text-transform: uppercase; cursor: pointer; transition: var(--transition); }
.btn-primary { background: var(--primary); color: white; box-shadow: 0 15px 40px rgba(109, 53, 150, 0.3); }
.btn-accent { background: var(--accent); color: var(--dark); box-shadow: 0 15px 40px rgba(252, 203, 12, 0.3); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); }
.btn:hover { transform: translateY(-7px) scale(1.02); }

/* Cards */
.card { background: white; padding: 50px; border-radius: 40px; box-shadow: var(--shadow); transition: var(--transition); }
.card:hover { transform: translateY(-15px); }

/* Footer Animation and Details */
footer { background: #111; color: white; padding: 100px 0 50px; }

.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 60px; margin-bottom: 80px; }

.footer-logo h2 { font-size: 2.5rem; margin-bottom: 20px; color: var(--accent); }
.footer-col h3 { font-size: 1.5rem; margin-bottom: 25px; position: relative; }
.footer-col h3::after { content: ''; position: absolute; bottom: -10px; left: 0; width: 40px; height: 3px; background: var(--accent); }

.footer-col ul li { margin-bottom: 15px; opacity: 0.7; transition: var(--transition); }
.footer-col ul li:hover { opacity: 1; transform: translateX(10px); }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 40px; display: flex; justify-content: space-between; align-items: center; opacity: 0.6; font-size: 0.9rem; }

.social-icons { display: flex; gap: 20px; }
.social-icons a { width: 45px; height: 45px; border: 1px solid rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center; border-radius: 50%; transition: var(--transition); }
.social-icons a:hover { background: var(--primary); border-color: var(--primary); transform: rotate(360deg); }

/* Responsive */
@media (max-width: 1200px) { 
    .footer-grid { grid-template-columns: 1fr 1fr; } 
    .sec-title { font-size: 3.5rem; }
}

@media (max-width: 992px) { 
    .sec-title { font-size: 2.8rem; }
    
    .menu-toggle { display: flex; }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 30px;
        transition: 0.6s cubic-bezier(0.19, 1, 0.22, 1);
        z-index: 1001;
        backdrop-filter: blur(20px);
    }

    .nav-links.active { right: 0; }
    
    .nav-links a { font-size: 1.5rem; color: white !important; }
    .nav-cta { background: var(--accent); width: auto; padding: 15px 40px; text-align: center; margin-top: 20px; border-radius: 50px; }

    nav:not(.scrolled) .nav-links a { color: white; }
    
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
    .section-padding { padding: 60px 0; }
    .sec-title { font-size: 2rem; }
    .hero-text h1 { font-size: 3rem; }
    .hero-text p { font-size: 0.95rem; }
    .container { padding: 0 15px; }
    
    .admission-popup { display: none; /* Hide on small screens to save space */ }
    
    /* Ensure forms and inputs don't overflow */
    input, textarea { width: 100% !important; box-sizing: border-box; }
}

@media (max-width: 480px) {
    .stagger-grid, .why-tgis-grid, .gallery-grid, .footer-grid {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }
    .hero-text h1 { font-size: 2.2rem; }
    .sec-title { font-size: 1.7rem; }
    .btn { padding: 12px 25px; font-size: 0.85rem; }
    .section-padding { padding: 40px 0; }
    .glass-card, .card { padding: 25px 20px; }
    .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
    .footer-bottom div { flex-wrap: wrap; justify-content: center; }
}