/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

:root {
    /* Color Palette - Elements of AI Inspired */
    --color-primary: #000000;
    --color-secondary: #ffffff;
    --color-accent: #FF8B7B; /* Coral accent */
    --color-accent-mint: #9DD9D2; /* Mint accent */
    --color-gray-light: #F5F5F5;
    --color-gray-medium: #E0E0E0;
    --color-gray-dark: #666666;
    --color-uni-gray: #8A8A8A;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Helvetica Neue', Arial, sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --border-radius: 4px;

    /* Transitions */
    --transition-speed: 0.3s;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: opacity var(--transition-speed);
}

a:hover {
    opacity: 0.7;
}

/* ==========================================================================
   Layout Components
   ========================================================================== */

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

section {
    padding: var(--spacing-xl) 0;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
    background-color: var(--color-secondary);
    border-bottom: 1px solid var(--color-gray-medium);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

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

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
    align-items: flex-start;
}

.logo-top,
.logo-bottom {
    font-weight: var(--font-weight-bold);
}

.logo-top {
    font-size: 1.2rem;
    letter-spacing: 0.25em;
}

.logo-bottom {
    font-size: 1.8rem;
    letter-spacing: 0.35em;
    margin-top: -0.3rem;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav a {
    font-size: 0.95rem;
    font-weight: var(--font-weight-medium);
    position: relative;
}

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

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

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    background: linear-gradient(135deg, var(--color-gray-light) 0%, var(--color-secondary) 100%);
    padding: var(--spacing-xl) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
}

/* ==========================================================================
   Animated Illustration
   ========================================================================== */

.animated-illustration {
    width: 100%;
    max-width: 400px;
    height: auto;
}

.node {
    fill: var(--color-accent);
    animation: pulse 2s ease-in-out infinite;
}

.node:nth-child(2) {
    animation-delay: 0.2s;
}

.node:nth-child(3) {
    animation-delay: 0.4s;
}

.node:nth-child(4) {
    animation-delay: 0.6s;
}

.connection {
    stroke: var(--color-accent-mint);
    stroke-width: 2;
    opacity: 0.6;
    animation: fadeInOut 3s ease-in-out infinite;
}

.connection:nth-child(5) {
    animation-delay: 0.5s;
}

.connection:nth-child(6) {
    animation-delay: 1s;
}

.connection:nth-child(7) {
    animation-delay: 1.5s;
}

.connection:nth-child(8) {
    animation-delay: 2s;
}

@keyframes pulse {
    0%, 100% {
        r: 20;
        opacity: 1;
    }
    50% {
        r: 25;
        opacity: 0.7;
    }
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.8;
    }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--color-gray-dark);
    opacity: 1;
}

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

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    opacity: 1;
}

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

.btn-outline:hover {
    border-color: var(--color-primary);
    opacity: 1;
}

/* ==========================================================================
   Section Styles
   ========================================================================== */

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-sm);
    font-size: 2.5rem;
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    font-size: 1.1rem;
    color: var(--color-gray-dark);
}

/* ==========================================================================
   Delivery Methods Section
   ========================================================================== */

.delivery-methods {
    background-color: var(--color-gray-light);
    padding: var(--spacing-xl) 0;
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.method-card {
    background-color: var(--color-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    transition: all var(--transition-speed);
    border: 1px solid var(--color-gray-medium);
}

.method-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--color-accent);
}

.method-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.method-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.method-card p {
    color: var(--color-gray-dark);
    margin: 0;
}

/* ==========================================================================
   Courses Section
   ========================================================================== */

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

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.course-card {
    background-color: var(--color-secondary);
    border: 1px solid var(--color-gray-medium);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-speed);
    position: relative;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.course-card.featured {
    border-color: var(--color-accent);
    border-width: 2px;
}

.badge {
    position: absolute;
    top: -12px;
    left: var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--spacing-sm);
}

.course-header h3 {
    font-size: 1.5rem;
}

.course-duration {
    font-size: 0.9rem;
    color: var(--color-gray-dark);
    font-weight: var(--font-weight-medium);
}

.course-content {
    flex-grow: 1;
}

.course-description {
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
}

.course-topics {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.course-topics li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.course-topics li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.course-price {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-top: var(--spacing-md);
    margin-bottom: 0;
}

.course-footer {
    margin-top: auto;
}

/* ==========================================================================
   Target Groups Section
   ========================================================================== */

.target-groups {
    background-color: var(--color-gray-light);
}

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.group-card {
    background-color: var(--color-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed);
}

.group-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.group-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-mint);
}

.group-card h3 {
    margin-bottom: var(--spacing-sm);
}

.group-card p {
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-sm);
}

.group-features {
    list-style: none;
}

.group-features li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    font-size: 0.95rem;
}

.group-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about {
    background-color: var(--color-secondary);
    padding: var(--spacing-xl) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.about-lead {
    font-size: 1.2rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.about-highlights {
    display: grid;
    gap: var(--spacing-md);
}

.highlight-item {
    padding: var(--spacing-md);
    background-color: var(--color-gray-light);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--color-accent);
}

.highlight-item h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.highlight-item p {
    margin: 0;
    color: var(--color-gray-dark);
    line-height: 1.6;
}

.quote {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-accent-mint);
    background-color: var(--color-gray-light);
    font-style: italic;
    font-size: 1.1rem;
    line-height: 1.6;
}

.quote cite {
    display: block;
    margin-top: var(--spacing-sm);
    font-style: normal;
    font-size: 0.9rem;
    color: var(--color-gray-dark);
}

.about-credentials {
    background-color: var(--color-gray-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    height: fit-content;
}

.about-credentials h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.media-list,
.expertise-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.media-list li,
.expertise-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.media-list li::before {
    content: '📰';
    position: absolute;
    left: 0;
}

.expertise-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.media-list a {
    color: var(--color-primary);
    text-decoration: underline;
}

.media-list a:hover {
    color: var(--color-accent);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Philosophy Section
   ========================================================================== */

.philosophy {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    text-align: center;
}

.philosophy h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.philosophy p {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    font-size: 1.1rem;
    opacity: 0.9;
}

.philosophy-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.stat-number {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
    text-align: center;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact {
    background-color: var(--color-gray-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-form {
    background-color: var(--color-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-gray-medium);
    border-radius: var(--border-radius);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.contact-info {
    background-color: var(--color-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

.contact-info h3 {
    margin-bottom: var(--spacing-md);
}

.info-item {
    margin-bottom: var(--spacing-md);
}

.info-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.info-item p {
    color: var(--color-gray-dark);
    margin: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    align-items: flex-start;
}

.footer-logo .logo-top,
.footer-logo .logo-bottom {
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
}

.footer-logo .logo-top {
    font-size: 1.1rem;
    letter-spacing: 0.25em;
}

.footer-logo .logo-bottom {
    font-size: 1.7rem;
    letter-spacing: 0.35em;
    margin-top: -0.3rem;
}

.footer-section h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.footer-section p {
    opacity: 0.8;
    font-size: 0.95rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--color-secondary);
    opacity: 0.8;
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    opacity: 0.6;
    font-size: 0.9rem;
    margin: 0;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        order: -1;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-cta {
        flex-direction: column;
        max-width: 300px;
        margin: 0 auto;
    }

    .nav {
        gap: var(--spacing-sm);
    }

    .course-grid,
    .groups-grid {
        grid-template-columns: 1fr;
    }

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

    .philosophy-stats {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .header .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .hero-title {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }