/* ============================================
   EDUHABS.IN - MASTER STYLESHEET
   ============================================ */

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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #7c3aed;
    --accent: #f59e0b;
    --dark: #0f172a;
    --gray-600: #475569;
    --gray-400: #94a3b8;
    --gray-200: #e2e8f0;
    --gray-100: #f1f5f9;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 40px rgba(37, 99, 235, 0.15);
    --radius: 16px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--dark);
    background: var(--gray-100);
    line-height: 1.7;
    padding-top: 80px;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */

header {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    height: 45px;
    width: auto;
    border-radius: 8px;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-name {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.5px;
}

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

.logo-tagline {
    font-size: 9px;
    font-weight: 700;
    color: var(--gray-400);
    letter-spacing: 1.8px;
    text-transform: uppercase;
}

nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

nav a {
    padding: 8px 18px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    color: var(--gray-600);
    transition: var(--transition);
}

nav a:hover,
nav a.active {
    background: var(--gray-100);
    color: var(--primary);
}

nav a.btn-primary {
    background: var(--primary);
    color: var(--white);
    padding: 10px 28px;
}

nav a.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--dark);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
}

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

.btn-secondary:hover {
    background: #6d28d9;
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(124, 58, 237, 0.35);
}

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

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    padding: 40px 0 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content .trust-badge {
    display: inline-block;
    background: var(--gray-100);
    padding: 6px 20px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 16px;
    border: 1px solid var(--gray-200);
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
}

.hero-content h1 .highlight {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 20px;
    color: var(--gray-600);
    margin: 20px 0 32px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 2px solid var(--gray-200);
}

.hero-stats .stat h3 {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
}

.hero-stats .stat p {
    font-size: 14px;
    color: var(--gray-400);
    margin: 0;
}

.hero-image {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius);
    height: 380px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
    padding: 40px;
    box-shadow: 0 30px 60px rgba(37, 99, 235, 0.25);
    position: relative;
    overflow: hidden;
}

.hero-image .emoji-big {
    font-size: 64px;
    margin-bottom: 12px;
}

.hero-image h2 {
    font-size: 28px;
    font-weight: 700;
}

.hero-image p {
    font-size: 16px;
    opacity: 0.9;
}

.hero-image .floating-badge {
    position: absolute;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    padding: 10px 18px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.floating-badge.b1 {
    top: 24px;
    right: 24px;
}
.floating-badge.b2 {
    bottom: 24px;
    left: 24px;
}

/* ============================================
   SECTION TITLES
   ============================================ */

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-600);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 48px;
}

.features-section {
    background: var(--white);
}

/* ============================================
   FEATURES / CARDS
   ============================================ */

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(226, 232, 240, 0.4);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.card .icon {
    font-size: 44px;
    margin-bottom: 16px;
    display: block;
}

.card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.card p {
    color: var(--gray-600);
}

/* ============================================
   COURSES GRID
   ============================================ */

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.course-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(226, 232, 240, 0.4);
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.course-card .thumb {
    height: 140px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--white);
}

.course-card .thumb.orange {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
}
.course-card .thumb.green {
    background: linear-gradient(135deg, #10b981, #06b6d4);
}
.course-card .thumb.purple {
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
}

.course-card .info {
    padding: 20px 24px 24px;
}

.course-card .info .tag {
    display: inline-block;
    background: var(--gray-100);
    padding: 2px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.course-card .info h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}

.course-card .info p {
    color: var(--gray-600);
    font-size: 14px;
}

.course-card .info .meta {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
    font-size: 14px;
    color: var(--gray-600);
}

/* ============================================
   FILTER TAGS
   ============================================ */

.filter-tags span {
    background: var(--gray-100);
    padding: 8px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.filter-tags span:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-tags .filter-active {
    background: var(--primary);
    color: var(--white);
}

.filter-tags .filter-active:hover {
    background: var(--primary-dark);
    color: var(--white);
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    border-radius: var(--radius);
    height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    box-shadow: 0 20px 40px rgba(124, 58, 237, 0.2);
}

.about-content h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
}

.about-content p {
    color: var(--gray-600);
    font-size: 17px;
    margin-bottom: 16px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.value-item {
    text-align: center;
    padding: 32px 20px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.value-item .icon {
    font-size: 40px;
    display: block;
    margin-bottom: 12px;
}

.value-item h4 {
    font-size: 18px;
    font-weight: 700;
}

/* ============================================
   BLOG
   ============================================ */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.blog-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.blog-card .thumb {
    height: 180px;
    background: var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 56px;
}

.blog-card .info {
    padding: 24px;
}

.blog-card .info .date {
    font-size: 13px;
    color: var(--gray-400);
    font-weight: 600;
}

.blog-card .info h4 {
    font-size: 20px;
    font-weight: 700;
    margin: 8px 0;
}

.blog-card .info p {
    color: var(--gray-600);
    font-size: 15px;
}

.blog-card .info .read-more {
    color: var(--primary);
    font-weight: 600;
    display: inline-block;
    margin-top: 12px;
}

/* ============================================
   CONTACT
   ============================================ */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--gray-600);
    margin-bottom: 32px;
}

.contact-detail {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.contact-detail .icon {
    font-size: 24px;
    width: 48px;
    height: 48px;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-detail .text h4 {
    font-weight: 600;
    font-size: 16px;
}

.contact-detail .text p {
    color: var(--gray-600);
    margin: 0;
    font-size: 14px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-form label {
    font-weight: 600;
    font-size: 14px;
    display: block;
    margin-bottom: 4px;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    font-size: 16px;
    transition: var(--transition);
    margin-bottom: 20px;
    font-family: inherit;
    background: var(--white);
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.contact-form textarea {
    height: 140px;
    resize: vertical;
}

/* ============================================
   PRIVACY POLICY
   ============================================ */

.privacy-content {
    background: var(--white);
    padding: 60px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.privacy-content h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 8px;
}

.privacy-content .last-updated {
    color: var(--gray-400);
    font-size: 14px;
    margin-bottom: 32px;
}

.privacy-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin: 32px 0 12px;
}

.privacy-content p {
    color: var(--gray-600);
    margin-bottom: 12px;
}

.privacy-content ul {
    padding-left: 24px;
    margin-bottom: 16px;
}

.privacy-content ul li {
    color: var(--gray-600);
    margin-bottom: 8px;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background: var(--dark);
    color: var(--gray-400);
    padding: 60px 0 32px;
    margin-top: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid #1e293b;
    margin-bottom: 32px;
}

.footer-brand .logo-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.footer-brand .logo-img {
    height: 50px;
    width: auto;
    border-radius: 8px;
    object-fit: contain;
}

.footer-brand .logo-name {
    font-size: 22px;
    color: var(--white);
}
.footer-brand .logo-name span {
    color: var(--primary);
}
.footer-brand .logo-tagline {
    font-size: 9px;
    color: var(--gray-400);
    letter-spacing: 1.8px;
}

.footer-brand p {
    margin-top: 12px;
    max-width: 320px;
    font-size: 15px;
    color: var(--gray-400);
}

.footer-col h4 {
    color: var(--white);
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    margin-bottom: 10px;
    font-size: 15px;
    transition: var(--transition);
    color: var(--gray-400);
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    font-size: 14px;
    color: var(--gray-400);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-content h1 {
        font-size: 38px;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 72px;
    }

    .mobile-toggle {
        display: block;
    }

    nav {
        display: none;
        flex-direction: column;
        background: var(--white);
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        padding: 20px;
        box-shadow: var(--shadow);
        border-radius: 0 0 var(--radius) var(--radius);
        gap: 4px;
    }

    nav.open {
        display: flex;
    }

    nav a {
        width: 100%;
        text-align: center;
        padding: 12px;
    }

    .logo-img {
        height: 35px;
    }
    .logo-name {
        font-size: 18px;
    }
    .logo-tagline {
        font-size: 7px;
        letter-spacing: 1.2px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        padding: 20px 0 40px;
        text-align: center;
    }

    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
        gap: 24px;
        flex-wrap: wrap;
    }

    .hero-image {
        height: 250px;
        order: -1;
    }
    .hero-image h2 {
        font-size: 20px;
    }
    .hero-image .emoji-big {
        font-size: 48px;
    }

    .grid-3,
    .grid-4,
    .blog-grid,
    .about-grid,
    .contact-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 28px;
    }

    .values-grid {
        grid-template-columns: 1fr 1fr;
    }

    .privacy-content {
        padding: 30px 20px;
    }

    .contact-form {
        padding: 24px;
    }

    .floating-badge {
        display: none;
    }

    .footer-brand .logo-img {
        height: 40px;
    }
    .footer-brand .logo-name {
        font-size: 18px;
    }

    .filter-tags {
        gap: 8px !important;
    }
    .filter-tags span {
        font-size: 12px;
        padding: 6px 14px;
    }
}

@media (max-width: 480px) {
    .values-grid {
        grid-template-columns: 1fr;
    }
    .hero-content h1 {
        font-size: 28px;
    }
    .hero-stats .stat h3 {
        font-size: 22px;
    }
    .hero-stats {
        gap: 16px;
    }
}