/* Meramind LMS - K-12 Modern Light Theme & Custom UI System */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --accent-blue: #3b82f6;
    --bg-light: #f8fafc;
    --bg-surface: #ffffff;
    --bg-dark-footer: #181c2a;
    --card-border: #e2e8f0;
    --text-dark: #0f172a;
    --text-muted: #64748b;
    --text-footer: #94a3b8;
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-light);
    color: var(--text-dark);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6, .fw-heading {
    font-family: var(--font-heading);
}

/* Header & Navigation */
.navbar-clean {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 0;
}

.brand-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.6rem;
    color: var(--text-dark);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link-clean {
    color: #475569;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem !important;
    transition: color 0.2s ease;
}

.nav-link-clean:hover, .nav-link-clean.active {
    color: var(--primary-color);
}

/* Hero Section */
.hero-clean-section {
    background-color: #f8fafc;
    padding: 4rem 0 3rem;
}

.hero-tag {
    font-size: 0.85rem;
    letter-spacing: 1.5px;
    font-weight: 800;
    color: var(--text-dark);
    text-transform: uppercase;
    margin-bottom: 1rem;
    display: inline-block;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.hero-title .highlight-blue {
    color: var(--primary-color);
}

.btn-pill-outline {
    border: 2px solid #cbd5e1;
    color: var(--primary-color);
    background-color: var(--bg-surface);
    font-weight: 600;
    padding: 0.75rem 2.25rem;
    border-radius: 50px;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-pill-outline:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
    color: var(--primary-hover);
}

/* Subject Cards Grid */
.subject-card {
    background: var(--bg-surface);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    text-decoration: none;
    color: var(--text-dark);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    height: 100%;
}

.subject-card:hover, .subject-card.active {
    transform: translateY(-4px);
    box-shadow: 0 12px 25px rgba(37, 99, 235, 0.1);
    border-color: var(--primary-color);
}

.subject-icon-wrap {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.subject-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    color: #1e293b;
}

/* Class Selection Grid Buttons */
.class-btn-card {
    background: var(--bg-surface);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 1.25rem 1rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    transition: all 0.2s ease;
    display: block;
    cursor: pointer;
}

.class-btn-card:hover, .class-btn-card.active {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.08);
}

/* Course Card */
.course-card-clean {
    background: var(--bg-surface);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.course-card-clean:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-color);
}

/* Feature Highlights */
.feature-box {
    text-align: left;
    padding: 1.5rem;
}

.feature-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 0.5rem;
}

.feature-desc {
    color: #64748b;
    font-size: 0.925rem;
    line-height: 1.6;
    margin: 0;
}

/* Dark Footer */
.footer-dark {
    background-color: var(--bg-dark-footer);
    color: var(--text-footer);
    padding: 4rem 0 2.5rem;
    margin-top: auto;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
    text-decoration: none;
    display: inline-block;
    margin-bottom: 1rem;
}

.footer-tagline {
    color: #94a3b8;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    max-width: 320px;
}

.footer-contact {
    color: #ffffff;
    font-weight: 600;
    font-size: 0.95rem;
}

.footer-heading {
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.925rem;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: #ffffff;
}

/* Auth Pages Clean Theme Support */
.auth-card {
    background: #ffffff;
    border: 1px solid var(--card-border);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    padding: 2.5rem;
}

.form-control, .form-select {
    background-color: #ffffff;
    border: 1px solid #cbd5e1;
    color: var(--text-dark);
    border-radius: 10px;
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    background-color: #ffffff;
    border-color: var(--primary-color);
    color: var(--text-dark);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-primary-custom {
    background: var(--primary-color);
    border: none;
    color: #ffffff;
    font-weight: 600;
    padding: 0.85rem 1.5rem;
    border-radius: 10px;
}

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