/* 
   SkillForge Academy Design System
   Brand Personality: Modern EdTech, Structured, Smart, Premium Learning
*/

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;700&display=swap');

:root {
    --primary: #4361ee; /* Modern Indigo */
    --primary-light: #4895ef;
    --secondary: #0f172a; /* Slate Dark */
    --accent: #f72585; /* Vibrant Pink */
    --bg-light: #ffffff;
    --bg-faint: #f8fafc;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 30px rgba(67, 97, 238, 0.08);
    --radius: 12px;
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .logo {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
}

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

ul {
    list-style: none;
}

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

/* BrandVelocity Badge */
.bv-badge {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--secondary);
    color: white;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 1000;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 999;
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    padding: 15px 5%;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.logo {
    font-size: 24px;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    color: var(--primary);
}

nav ul {
    display: flex;
    gap: 30px;
}

nav ul li a {
    font-size: 15px;
    font-weight: 600;
    color: var(--secondary);
}

nav ul li a:hover, nav ul li a.active {
    color: var(--primary);
}

.header-cta {
    background: var(--primary);
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
}

.header-cta:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.2);
}

/* Sections */
section {
    padding: 100px 5%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.tag {
    display: inline-block;
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 20px;
}

h2 {
    font-size: 42px;
    margin-bottom: 20px;
    line-height: 1.2;
}

/* Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

/* Course Cards */
.course-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid #f1f5f9;
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(67, 97, 238, 0.12);
}

.course-img {
    height: 200px;
    background: #eee;
    overflow: hidden;
}

.course-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-body {
    padding: 30px;
}

.course-cat {
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 10px;
    display: block;
}

.course-title {
    font-size: 18px;
    margin-bottom: 15px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
}

/* Footer */
footer {
    background: var(--secondary);
    color: white;
    padding: 80px 5% 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
}

.footer-col h4 {
    margin-bottom: 25px;
    font-size: 16px;
    color: var(--primary-light);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 14px;
}

.footer-links a:hover {
    color: white;
}

.copyright {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.05);
    text-align: center;
    font-size: 12px;
    color: rgba(255,255,255,0.4);
}

@media (max-width: 992px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr; }
    nav { display: none; }
}