/* ============================================
   VARIABLES & GLOBAL STYLES
   ============================================ */

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #8b5cf6;
    --accent: #fbbf24;
    --background: #f8fafc;
    --foreground: #1e293b;
    --card: #ffffff;
    --border: #e2e8f0;
    --muted: #64748b;
    --success: #10b981;
    --radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    margin-bottom: 1.5rem;
}

h2 {
    font-size: clamp(1.875rem, 4vw, 2.25rem);
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

p {
    font-size: clamp(1rem, 1.1vw, 1.125rem);
    line-height: 1.8;
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--foreground);
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

.nav-button {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary);
    color: white;
    border-radius: var(--radius);
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    z-index: 0;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    z-index: 1;
    position: relative;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:active {
    transform: scale(0.95);
}

.btn-secondary {
    background-color: transparent;
    color: var(--foreground);
    border: 2px solid var(--border);
    position: relative;
    z-index: 1;
}

.btn-secondary:hover {
    background-color: var(--background);
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
    width: 100%;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

@media (min-width: 768px) {
    .hero {
        padding: 6rem 0;
    }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-text {
    space-y: 2rem;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--muted);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
    }
}

.hero-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--muted);
}

.badge-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    background-color: rgba(16, 185, 129, 0.1);
    border-radius: 50%;
    color: var(--success);
}

.hero-visual {
    display: none;
}

@media (min-width: 768px) {
    .hero-visual {
        display: block;
    }
}

.hero-box {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 1.5rem;
    padding: 3rem 2rem;
    text-align: center;
    color: white;
    box-shadow: var(--shadow-lg);
}

.hero-emoji {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.hero-box-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
}

.hero-box-text {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.hero-illustration {
    width: 100%;
    max-width: 200px;
    height: auto;
    margin-bottom: 1.5rem;
    animation: float 3s ease-in-out infinite;
}

/* ============================================
   SECTIONS
   ============================================ */

section {
    padding: 4rem 0;
}

@media (min-width: 768px) {
    section {
        padding: 6rem 0;
    }
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s ease;
}

.section-header h2 {
    color: var(--foreground);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--muted);
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about {
    background-color: var(--card);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.about-card {
    background-color: var(--background);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease both;
}

.about-card:nth-child(1) { animation-delay: 0.1s; }
.about-card:nth-child(2) { animation-delay: 0.2s; }
.about-card:nth-child(3) { animation-delay: 0.3s; }

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s ease;
}

.about-card:hover::before {
    left: 100%;
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: inline-block;
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-card h3 {
    color: var(--foreground);
    margin-bottom: 0.75rem;
}

.about-card p {
    color: var(--muted);
    margin-bottom: 0;
}

/* ============================================
   LEARN SECTION
   ============================================ */

.learn {
    background-color: var(--card);
}

.learn-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .learn-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .learn-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.learn-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background-color: var(--background);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.learn-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.02), rgba(139, 92, 246, 0.02));
}

.learn-icon {
    font-size: 2rem;
    flex-shrink: 0;
    line-height: 1;
    width: 3.5rem;
    height: 3.5rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.learn-item h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.learn-item p {
    color: var(--muted);
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* ============================================
   TARGET SECTION
   ============================================ */

.target {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.target-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .target-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.target-card {
    background-color: var(--card);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    border: 2px solid rgba(59, 130, 246, 0.2);
    transition: all 0.3s ease;
}

.target-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.05));
}

.target-emoji {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: inline-block;
    width: 5rem;
    height: 5rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.target-card h3 {
    color: var(--foreground);
    margin-bottom: 0.75rem;
}

.target-card p {
    color: var(--muted);
    margin-bottom: 0;
}

/* ============================================
   APPLY SECTION
   ============================================ */

.apply {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--card);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

@media (min-width: 768px) {
    .form-container {
        padding: 3rem;
    }
}

.application-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--foreground);
    font-size: 0.95rem;
}

.form-group input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background-color: var(--background);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group input::placeholder {
    color: var(--muted);
}

.form-note {
    font-size: 0.875rem;
    color: var(--muted);
    text-align: center;
    margin-bottom: 0;
}

.success-message {
    text-align: center;
    padding: 2rem;
}

.success-content {
    animation: slideIn 0.3s ease;
}

.success-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background-color: rgba(16, 185, 129, 0.1);
    border-radius: 50%;
    color: var(--success);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.success-content h3 {
    color: var(--success);
    margin-bottom: 0.5rem;
}

.success-content p {
    color: var(--muted);
    margin-bottom: 0;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: linear-gradient(135deg, #1a1f3a 0%, #16213e 100%);
    border-top: 1px solid rgba(226, 232, 240, 0.1);
    padding: 3rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease;
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-section {
    color: #cbd5e1;
}

.footer-section h4 {
    color: #e2e8f0;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #cbd5e1;
    font-size: 0.95rem;
    margin-bottom: 0;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 0.75rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #cbd5e1;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #3b82f6;
}

.footer-bottom {
    border-top: 1px solid rgba(226, 232, 240, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: #94a3b8;
    font-size: 0.875rem;
}

.footer-bottom p {
    margin-bottom: 0;
    color: #94a3b8;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

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

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

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 640px) {
    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }

    .form-container {
        padding: 1.5rem;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ============================================
   CONTACT BLOCK SECTION
   ============================================ */

.contact-block {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 3rem 0;
    margin: 2rem 0;
    position: relative;
    overflow: hidden;
}

.contact-block::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: pulse 4s ease-in-out infinite;
}

.contact-block::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    animation: pulse 5s ease-in-out infinite 1s;
}

@media (min-width: 768px) {
    .contact-block {
        padding: 4rem 0;
        margin: 3rem 0;
    }
}

.contact-box {
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
    animation: slideIn 0.6s ease;
}

@media (min-width: 768px) {
    .contact-box {
        padding: 3.5rem;
    }
}

.contact-box h3 {
    color: var(--foreground);
    margin-bottom: 1rem;
    font-size: 1.75rem;
}

.contact-box p {
    color: var(--muted);
    margin-bottom: 1.5rem;
}

.contact-email {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 0.875rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 1.125rem;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.contact-email:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
    color: white;
}