:root {
    --primary: #0F172A;
    /* Slate 900 */
    --primary-light: #1E293B;
    /* Slate 800 */
    --accent: #F59E0B;
    /* Amber 500 */
    --accent-hover: #D97706;
    /* Amber 600 */
    --text-main: #0F172A;
    --text-light: #64748B;
    --white: #FFFFFF;
    --bg-light: #F8FAFC;
    /* Slate 50 */
    --bg-white: #FFFFFF;

    --font-heading: 'Manrope', sans-serif;
    --radius-md: 12px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: var(--font-heading);
    background-color: var(--white);
    color: var(--text-main);
    line-height: 1.6;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

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

/* Sections & Rhythm */
section {
    padding: 100px 0;
}

section:nth-child(even) {
    background-color: var(--bg-light);
}

section:nth-child(odd) {
    background-color: var(--white);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
}

/* UI Elements */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    font-size: 16px;
}

.btn--primary {
    background-color: var(--accent);
    color: var(--white);
    box-shadow: 0 4px 6px -1px rgba(245, 158, 11, 0.3);
}

.btn--primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(245, 158, 11, 0.4);
}

.btn--outline {
    border: 2px solid #E2E8F0;
    color: var(--primary);
    padding: 12px 24px;
}

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

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid #E2E8F0;
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

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

.logo__highlight {
    color: var(--accent);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav__link {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    font-size: 15px;
    transition: color 0.2s;
}

.nav__link:hover {
    color: var(--accent);
}

/* Hero Section */
.hero {
    padding-top: 180px;
    padding-bottom: 120px;
    background-color: var(--primary);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

/* Reset nth-child for Hero as it's specific */
.hero:nth-child(n) {
    background-color: var(--primary);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 0.8fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero__content {
    max-width: 640px;
}

.hero__label {
    display: inline-block;
    background: rgba(255, 165, 0, 0.2);
    color: #FCD34D;
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero__title {
    font-size: 56px;
    line-height: 1.1;
    margin-bottom: 24px;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero__subtitle {
    font-size: 20px;
    color: #CBD5E1;
    margin-bottom: 48px;
    max-width: 500px;
}

.hero__stats {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 40px;
    margin-bottom: 48px;
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item__value {
    font-size: 32px;
    font-weight: 800;
    color: var(--white);
    display: block;
    margin-bottom: 4px;
}

.stat-item__label {
    font-size: 14px;
    color: #94A3B8;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.hero__visual-block {
    position: relative;
    height: 500px;
    background: linear-gradient(135deg, #1E293B, #334155);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__visual-block::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
}

.hero__installment {
    margin-top: 16px;
    font-size: 15px;
    color: #94A3B8;
}

/* Cards & Grids */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid #E2E8F0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: #CBD5E1;
}

.card h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--primary);
}

.card p {
    color: var(--text-light);
}

/* Audience - Checkered Grid */
.audience-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.audience-item {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid #F1F5F9;
    box-shadow: var(--shadow-sm);
    font-weight: 600;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

/* Skills - Icon List Style */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
}

.skill-row {
    display: flex;
    align-items: start;
    gap: 20px;
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid #E2E8F0;
}

.skill-icon {
    width: 40px;
    height: 40px;
    background: #FEF3C7;
    color: #D97706;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
}

.skill-text {
    font-weight: 600;
    color: var(--primary);
    font-size: 18px;
}

/* Teachers - Profiles */
.teachers-wrapper {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.teacher-profile {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    text-align: center;
    width: 350px;
    border: 1px solid #E2E8F0;
}

.teacher-avatar-img {
    width: 150px;
    height: 150px;
    object-fit: contain;
    margin-bottom: 24px;
}

.teacher-name {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary);
}

.teacher-role {
    font-size: 14px;
    color: var(--accent);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 1px;
}

/* Certificate */
.cert-section {
    background-color: var(--primary) !important;
    color: var(--white);
}

.cert-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.cert-visual-img {
    background: transparent;
    padding: 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-visual-img img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 4px solid var(--white);
}

.cert-list li {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    font-size: 18px;
}

.cert-list li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 800;
}

/* Footer */
footer {
    background: #020617;
    color: #94A3B8;
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

    .hero__container,
    .cert-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__stats {
        justify-content: center;
    }

    .audience-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .header__container {
        flex-direction: column;
        height: auto;
        padding: 16px;
        gap: 16px;
    }

    .nav {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero__title {
        font-size: 36px;
    }

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

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