/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Based on professional photo */
    --primary-dark: #0b1220;
    --secondary-dark: #10182a;
    --tertiary-dark: #19233a;
    --accent-blue: #3b82f6;
    --accent-blue-light: #60a5fa;
    --accent-blue-bright: #2563eb;
    --accent-teal: #14b8a6;
    --accent-purple: #a78bfa;
    --text-primary: #f8fafc;
    --text-secondary: #e5e7eb;
    --text-muted: #cbd5e1;
    --border-color: #475569;
    --success-green: #10b981;
    --focus-ring: #93c5fd;

    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 100px 0;
    --card-padding: 32px;

    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--primary-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 20, 25, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
}

.nav-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-menu a:hover {
    color: var(--accent-blue-light);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-blue-bright);
    transition: var(--transition-smooth);
}

.nav-menu a:hover::after {
    width: 100%;
}

.cta-btn-small {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
    color: var(--text-primary) !important;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
}

.cta-btn-small::after {
    display: none;
}

.cta-btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(74, 144, 226, 0.3);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(10, 14, 39, 0.90) 0%,
        rgba(10, 14, 39, 0.78) 50%,
        rgba(20, 27, 45, 0.60) 100%
    );
    z-index: 1;
}

.hero-image {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    height: 100%;
    width: auto;
    max-width: 45%;
    object-fit: cover;
    object-position: center;
    opacity: 0.75;
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 700px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(74, 144, 226, 0.15);
    border: 1px solid rgba(74, 144, 226, 0.3);
    color: var(--accent-blue-light);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-badge svg {
    width: 16px;
    height: 16px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-blue-bright), var(--accent-blue-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-bottom: 48px;
    padding: 32px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--accent-blue-bright);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(74, 144, 226, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-blue);
}

.btn-outline {
    background: transparent;
    color: var(--accent-blue-light);
    border: 2px solid var(--accent-blue);
}

.btn-outline:hover {
    background: var(--accent-blue);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background: linear-gradient(135deg, #25D366, #1ebe57);
    color: white;
    font-size: 18px;
    padding: 20px 40px;
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4);
}

/* Section Styles */
section {
    padding: var(--section-padding);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

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

/* About Section */
.about {
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
}

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.credential-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: var(--card-padding);
    transition: var(--transition-smooth);
}

.credential-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-blue);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.credential-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.credential-icon svg {
    color: white;
}

.credential-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.credential-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 15px;
}

/* Course Overview */
.course-overview {
    background: var(--secondary-dark);
}

.overview-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.overview-text h2 {
    font-size: 38px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.overview-intro {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 32px;
    line-height: 1.7;
}

.overview-list {
    list-style: none;
}

.overview-list li {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.overview-list svg {
    color: var(--accent-blue-bright);
    flex-shrink: 0;
    margin-top: 2px;
}

.overview-list span {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
}

.overview-stats {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: var(--transition-smooth);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-blue);
    transform: translateX(10px);
}

.stat-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.stat-icon svg {
    color: white;
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent-blue-bright);
    margin-bottom: 4px;
}

.stat-desc {
    color: var(--text-muted);
    font-size: 14px;
}

/* Curriculum Section */
.curriculum {
    background: linear-gradient(180deg, var(--secondary-dark) 0%, var(--primary-dark) 100%);
}

.curriculum-timeline {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.month-block {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.month-block:hover {
    border-color: var(--accent-blue);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.month-header {
    display: flex;
    align-items: center;
    gap: 24px;
    background: rgba(74, 144, 226, 0.1);
    padding: 32px;
    border-bottom: 1px solid var(--border-color);
}

.month-number {
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-blue-bright), var(--accent-blue-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.month-info h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
}

.month-info p {
    color: var(--text-secondary);
    font-size: 16px;
}

.month-content {
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.week-item {
    padding-left: 24px;
    border-left: 3px solid var(--accent-blue);
}

.week-label {
    display: inline-block;
    background: rgba(74, 144, 226, 0.15);
    color: var(--accent-blue-light);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.week-item h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.week-item ul {
    list-style: none;
    margin-left: 0;
}

.week-item ul li {
    color: var(--text-secondary);
    margin-bottom: 10px;
    padding-left: 24px;
    position: relative;
    font-size: 15px;
}

.week-item ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-blue-light);
    font-weight: 600;
}

/* Timeline Section */
.timeline-section {
    background: var(--secondary-dark);
}

.schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.schedule-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    transition: var(--transition-smooth);
}

.schedule-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-blue);
    transform: translateY(-5px);
}

.schedule-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.schedule-icon svg {
    color: white;
}

.schedule-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.schedule-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent-blue-bright);
    margin-bottom: 8px;
}

.schedule-desc {
    color: var(--text-muted);
    font-size: 14px;
}

/* Pricing Section */
.pricing {
    background: linear-gradient(180deg, var(--secondary-dark) 0%, var(--primary-dark) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px;
    transition: var(--transition-smooth);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
    border: 2px solid var(--accent-blue);
    background: rgba(74, 144, 226, 0.05);
}

.featured-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent-blue-bright), var(--accent-blue-light));
    color: white;
    padding: 8px 24px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 8px;
}

.pricing-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

.pricing-price {
    text-align: center;
    margin-bottom: 16px;
}

.currency {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-secondary);
    vertical-align: top;
}

.amount {
    font-size: 64px;
    font-weight: 900;
    color: var(--accent-blue-bright);
    line-height: 1;
}

.period {
    font-size: 18px;
    color: var(--text-muted);
}

.pricing-total {
    text-align: center;
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    align-items: flex-start;
}

.pricing-features svg {
    color: var(--accent-blue-bright);
    flex-shrink: 0;
    margin-top: 2px;
}

.pricing-features span {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.5;
}

.pricing-card .btn {
    width: 100%;
    justify-content: center;
}

/* Contact Section */
.contact {
    background: var(--secondary-dark);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-text h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 32px;
    line-height: 1.7;
}

.contact-benefits {
    list-style: none;
}

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

.contact-benefits svg {
    color: var(--success-green);
    flex-shrink: 0;
}

.contact-benefits span {
    color: var(--text-secondary);
    font-size: 16px;
}

.contact-cta {
    text-align: center;
}

.contact-phone {
    margin-top: 16px;
    color: var(--text-muted);
    font-size: 16px;
}

/* Footer */
.footer {
    background: var(--primary-dark);
    border-top: 1px solid var(--border-color);
    padding: 48px 0 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}

.footer-brand h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--accent-blue-light);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .hero-image {
        max-width: 60%;
        opacity: 0.2;
    }

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

    .overview-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .section-title {
        font-size: 32px;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
    }

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

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--primary-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue-light);
}

/* Accessibility tweaks */
a:focus, button:focus, .btn:focus, .cta-btn-small:focus {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

p, li, .section-subtitle, .overview-intro, .contact-text p {
    letter-spacing: 0.01em;
}

@media (max-width: 480px) {
    body { font-size: 17px; }
    .container { padding: 0 18px; }
    .btn { padding: 14px 24px; font-size: 15px; }
}


/* Payments page */
.payments-hero {
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    padding: 120px 0 40px;
    text-align: center;
}
.kofi-wrapper {
    max-width: 800px;
    margin: 24px auto 80px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
}
.kofi-note {
    color: var(--text-secondary);
    text-align: center;
    margin-top: 12px;
    font-size: 14px;
}
.kofi-iframe {
    width: 100%;
    min-height: 720px;
    border: none;
    background: #f9f9f9;
    border-radius: 12px;
}