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

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #6366f1;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --text-dark: #0f172a;
    --text-medium: #334155;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--bg-white);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header and Navigation */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.02);
}

.logo-image {
    height: 52px;
    width: 52px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.logo h1 {
    font-size: 1.875rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    position: relative;
    color: white;
    padding: 8rem 0 6rem;
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-tagline {
    display: inline-block;
    font-size: 1.125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    padding: 0.75rem 2rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 900;
    margin-bottom: 1.75rem;
    line-height: 1.15;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.375rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    line-height: 1.75;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1.25rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 1rem 2.5rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1.05rem;
    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, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px 0 rgba(79, 70, 229, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: var(--bg-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px 0 rgba(0, 0, 0, 0.15);
}

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

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

/* Section Styles */
section {
    padding: 6rem 0;
    position: relative;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 1.25rem;
    color: var(--text-dark);
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 4rem;
    margin-top: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* About Section */
.about {
    background: linear-gradient(to bottom, var(--bg-white) 0%, var(--bg-light) 100%);
}

.about-text p {
    font-size: 1.2rem;
    color: var(--text-medium);
    margin-bottom: 1.75rem;
    line-height: 1.9;
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.feature {
    display: flex;
    gap: 1.25rem;
    padding: 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.feature:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: bold;
    flex-shrink: 0;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.feature-text h4 {
    font-size: 1.25rem;
    margin-bottom: 0.625rem;
    color: var(--text-dark);
    font-weight: 700;
}

.feature-text p {
    color: var(--text-light);
    font-size: 1rem;
    margin: 0;
    line-height: 1.7;
}

/* Subjects Section */
.subjects {
    background: var(--bg-white);
}

.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.subject-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    border: 2px solid transparent;
    overflow: hidden;
}

.subject-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--text-light), var(--text-light));
    transition: all 0.4s ease;
}

.subject-card.active::before {
    background: linear-gradient(90deg, var(--success-color), #059669);
}

.subject-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-2xl);
}

.subject-card.active {
    border-color: rgba(16, 185, 129, 0.2);
    background: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
}

.subject-card h3 {
    font-size: 1.375rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
    font-weight: 700;
}

.subject-card p {
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1.125rem;
    border-radius: 24px;
    font-size: 0.85rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.badge.coming-soon {
    background: linear-gradient(135deg, #94a3b8 0%, #64748b 100%);
    box-shadow: 0 2px 8px rgba(100, 116, 139, 0.2);
}

/* Our Services Section */
.services {
    background: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.service-card {
    background: white;
    padding: 3rem 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s ease;
    border: 2px solid var(--border-color);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-color);
}

.service-card.primary {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #ffffff 0%, #eef2ff 100%);
}

.service-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    filter: grayscale(0);
}

.service-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.service-status {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.service-status.active {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.service-status.coming {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}

.service-card p {
    color: var(--text-medium);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-size: 1.05rem;
}

.service-features {
    list-style: none;
    margin-bottom: 2.5rem;
    text-align: left;
}

.service-features li {
    padding: 0.75rem 0;
    color: var(--text-medium);
    font-size: 1rem;
    position: relative;
    padding-left: 2rem;
}

.service-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.25rem;
}

.service-card .btn {
    width: 100%;
    margin-top: auto;
}

/* How It Works Section */
.how-it-works {
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 50%, #f8fafc 100%);
    position: relative;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3.5rem;
    margin-top: 4rem;
}

.step {
    text-align: center;
    padding: 2.5rem;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s ease;
    position: relative;
}

.step:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-2xl);
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 900;
    margin: 0 auto 2rem;
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
    position: relative;
}

.step-number::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 2px solid var(--primary-light);
    opacity: 0.3;
}

.step h3 {
    font-size: 1.625rem;
    margin-bottom: 1.25rem;
    color: var(--text-dark);
    font-weight: 700;
}

.step p {
    color: var(--text-medium);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* Pricing Section */
.pricing {
    background: var(--bg-white);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.pricing-card {
    background: white;
    padding: 3rem 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    border: 2px solid var(--border-color);
}

.pricing-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-2xl);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #ffffff 0%, #eef2ff 100%);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.2);
}

.pricing-card.featured:hover {
    box-shadow: 0 25px 50px rgba(79, 70, 229, 0.3);
}

.popular-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.5rem 1.75rem;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.pricing-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1.25rem;
    color: var(--text-dark);
    font-weight: 700;
}

.price {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2.5rem;
    line-height: 1;
}

.price span {
    font-size: 1.125rem;
    color: var(--text-light);
    font-weight: 500;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2.5rem;
}

.pricing-features li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-medium);
    font-size: 1.05rem;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: "✓";
    color: var(--success-color);
    font-weight: bold;
    margin-right: 1rem;
    font-size: 1.25rem;
}

.payment-note {
    text-align: center;
    color: var(--text-light);
    font-size: 1rem;
    margin-top: 2.5rem;
    font-style: italic;
}

/* Contact Section */
.contact {
    background: linear-gradient(to bottom, var(--bg-light) 0%, var(--bg-white) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    margin-top: 4rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 1.25rem;
    color: var(--text-dark);
    font-weight: 700;
}

.contact-info p {
    color: var(--text-medium);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    font-size: 1.125rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    padding: 1.25rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.contact-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.contact-item strong {
    color: var(--text-dark);
    font-weight: 700;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-item span {
    color: var(--text-medium);
    font-size: 1.125rem;
}

/* Contact Form */
.contact-form {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 1.75rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.625rem;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--text-dark) 0%, #1e293b 100%);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    font-size: 1.375rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
    font-size: 1.05rem;
}

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

.footer-section ul li {
    margin-bottom: 0.875rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.05rem;
}

.footer-section ul li a:hover {
    color: white;
    padding-left: 4px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
}

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

    .hero {
        padding: 5rem 0 4rem;
    }

    .hero-tagline {
        font-size: 0.95rem;
        padding: 0.625rem 1.5rem;
    }

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

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2.25rem;
    }

    .section-subtitle {
        font-size: 1.125rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

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

    .steps {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    section {
        padding: 4rem 0;
    }

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

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

    .contact-form {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0 3rem;
    }

    .hero-tagline {
        font-size: 0.85rem;
        padding: 0.5rem 1.25rem;
        letter-spacing: 0.08em;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .logo-image {
        height: 44px;
        width: 44px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.875rem;
    }
}