/* Landing Page Styles - Material Design 3 Aligned */

/* Hero Section */
.hero-section {
    position: relative;
    padding: 160px 24px 100px;
    text-align: center;
    overflow: hidden;
    background: radial-gradient(circle at 70% 30%, #D7E3FF 0%, #FFFFFF 100%);
    color: var(--md-sys-color-on-surface);
}

.hero-chip {
    display: inline-flex;
    padding: 6px 16px;
    background: var(--google-blue-container);
    color: var(--google-blue);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid rgba(66, 133, 244, 0.2);
}

.hero-bg-glow {
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(66, 133, 244, 0.15) 0%, transparent 70%);
    filter: blur(60px);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    /* Using global typography if available, else defining here */
    font-family: var(--md-ref-typeface-brand);
    font-size: 57px;
    /* Display Large */
    line-height: 64px;
    letter-spacing: -0.25px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--md-sys-color-on-surface);
}

.hero-content h1 span {
    color: var(--md-sys-color-primary);
}

.hero-content p {
    font-family: var(--md-ref-typeface-plain);
    font-size: 22px;
    /* Headline/Title Large equivalent */
    line-height: 28px;
    max-width: 680px;
    margin: 0 auto 48px;
    color: var(--md-sys-color-on-surface-variant);
}

.cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    /* M3 Standard Top App Bar height */
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: all 0.2s var(--md-sys-motion-easing-standard);
    background: transparent;
    box-sizing: border-box;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-brand);
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

/* Features Section */
.features {
    padding: 80px 24px;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

/* Extending global card classes visually */
.feature-card {
    background-color: var(--md-sys-color-surface-1);
    /* Surface Container Low */
    padding: 32px;
    border-radius: var(--md-sys-shape-corner-large);
    transition: all 0.2s var(--md-sys-motion-easing-standard);
    border: 1px solid transparent;
}

.feature-card:hover {
    background-color: var(--md-sys-color-surface-2);
    /* Surface Container */
    transform: translateY(-4px);
    box-shadow: 0 4px 8px 3px rgba(0, 0, 0, 0.15);
    /* Elevation 2 */
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 24px;
    color: var(--md-sys-color-primary);
    height: 64px;
    width: 64px;
    background: var(--md-sys-color-primary-container);
    border-radius: 20px;
    /* Squircle-ish */
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card h3 {
    font-family: var(--md-ref-typeface-brand);
    font-size: 24px;
    /* Headline Small */
    margin-bottom: 12px;
    color: var(--md-sys-color-on-surface);
}

.feature-card p {
    font-size: 16px;
    /* Body Large */
    line-height: 24px;
    color: var(--md-sys-color-on-surface-variant);
}

/* Stats Section (New) */
.stats-section {
    padding: 60px 24px;
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    text-align: center;
}

.stats-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.stat-item h2 {
    font-size: 45px;
    /* Display Small */
    font-weight: 700;
    margin: 0;
    color: var(--md-sys-color-primary);
}

.stat-item p {
    font-size: 16px;
    /* Title Medium */
    font-weight: 500;
    opacity: 0.8;
}

/* Courses Grid */
.courses-section {
    padding: 80px 24px;
    background: var(--md-sys-color-surface);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-family: var(--md-ref-typeface-brand);
    font-size: 36px;
    /* Headline Large */
    color: var(--md-sys-color-on-surface);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 16px;
    color: var(--md-sys-color-on-surface-variant);
}

.course-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--md-sys-color-surface-1);
    border-radius: var(--md-sys-shape-corner-medium);
    overflow: hidden;
    transition: all 0.2s var(--md-sys-motion-easing-standard);
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--md-sys-color-outline-variant);
}

.course-card:hover {
    box-shadow: 0 4px 8px 3px rgba(0, 0, 0, 0.15);
    /* Elevation 2 */
    border-color: transparent;
}

.course-thumb {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--md-sys-color-surface-variant);
}

.course-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.course-category {
    font-size: 12px;
    /* Label Medium */
    font-weight: 500;
    color: var(--md-sys-color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    padding: 4px 12px;
    border-radius: 100px;
    align-self: flex-start;
}

.course-title {
    font-size: 20px;
    /* Title Large */
    line-height: 28px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--md-sys-color-on-surface);
}

.course-actions {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--md-sys-color-outline-variant);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--md-sys-color-on-surface);
}

/* Testimonials Section */
.testimonials-section {
    padding: 80px 24px;
    background-color: var(--md-sys-color-surface-variant);
    /* Slightly different bg */
}

/* Footer */
.footer-section {
    background-color: var(--md-sys-color-inverse-surface, #313033);
    color: var(--md-sys-color-inverse-on-surface, #f4eff4);
    padding: 60px 24px 24px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--md-sys-color-primary-container);
    /* lighter blue for contrast on dark */
    font-weight: 500;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--md-sys-color-inverse-on-surface);
    opacity: 0.8;
    text-decoration: none;
    transition: opacity 0.2s;
}

.footer-links a:hover {
    opacity: 1;
}

.newsletter-form {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.newsletter-form input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 10px;
    border-radius: 4px;
    flex: 1;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 14px;
    opacity: 0.6;
}

/* Mobile Responsiveness */
@media (max-width: 900px) {

    /* Tablet */
    .hero-content h1 {
        font-size: 45px;
        line-height: 52px;
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {

    /* Phone */
    .hero-content h1 {
        font-size: 36px;
        line-height: 44px;
    }

    .hero-content p {
        font-size: 18px;
        line-height: 24px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .navbar {
        padding: 0 16px;
    }
}