/* 
   Disha Computer Education - ULTRA PREMIUM Design System
   Color Palette: Deep Black (#050505), Charcoal (#0f0f0f), Luxury Gold Gradient
*/

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

:root {
    --bg-deep: #050505;
    --bg-surface: #0f0f0f;
    --accent-gold: linear-gradient(135deg, #c5a059 0%, #f9e69c 50%, #d5b97d 100%);
    --gold-text: #d5b97d;
    --text-main: #ffffff;
    --text-muted: #a0a0a0;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-premium: 0 20px 40px rgba(0, 0, 0, 0.4);
}

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

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    /* Noise Texture Overlay */
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("https://www.transparenttextures.com/patterns/carbon-fibre.png");
    opacity: 0.03;
    pointer-events: none;
    z-index: 10000;
}

h1,
h2,
h3,
h4,
.logo {
    font-family: 'Outfit', sans-serif;
    letter-spacing: -0.02em;
}

/* --- Premium Navigation --- */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 30px 0;
    transition: var(--transition-smooth);
}

header.sticky {
    padding: 15px 0;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    text-transform: uppercase;
    background: var(--accent-gold);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links li a {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--gold-text);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 16px 40px;
    border-radius: 2px;
    /* Sharp corporate look */
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    border: none;
}

.btn-primary {
    background: var(--accent-gold);
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(197, 160, 89, 0.3);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--gold-text);
    color: var(--gold-text);
}

.btn-outline:hover {
    background: var(--accent-gold);
    color: #000;
    transform: translateY(-5px);
}

/* --- Sections --- */
section {
    padding: 140px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 80px;
}

.section-title h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.section-title span {
    font-size: 0.9rem;
    color: var(--gold-text);
    text-transform: uppercase;
    letter-spacing: 4px;
    font-weight: 500;
    display: block;
    margin-bottom: 10px;
}

/* --- Luxury Cards --- */
.card {
    background: var(--bg-surface);
    padding: 50px;
    border: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
    position: relative;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gold);
    transform: scaleX(0);
    transition: var(--transition-smooth);
    transform-origin: left;
}

.card:hover {
    transform: translateY(-15px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(197, 160, 89, 0.5);
    box-shadow: var(--shadow-premium);
}

.card:hover::before {
    transform: scaleX(1);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -150px;
    right: -150px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(197, 160, 89, 0.05) 0%, transparent 70%);
}

/* --- Footer --- */
footer {
    background: var(--bg-deep);
    padding: 100px 0 40px;
    border-top: 1px solid var(--glass-border);
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .section-title h2 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: block !important;
        font-size: 1.5rem;
        cursor: pointer;
    }

    .container {
        padding: 0 20px;
    }
}

.menu-toggle {
    display: none;
}

/* --- Mobile Nav Premium --- */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: var(--transition-smooth);
}

.mobile-nav.open {
    right: 0;
}

.mobile-nav ul {
    list-style: none;
}

.mobile-nav ul li {
    margin: 20px 0;
}

.mobile-nav ul li a {
    font-size: 1.8rem;
    color: #fff;
    text-decoration: none;
    font-family: 'Outfit', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.close-menu {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 2rem;
    cursor: pointer;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
    background: #333;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gold-text);
}

/* --- Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1s ease-out, transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}