/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Brand Colors - Teacher Purple Theme */
    --primary-purple: #390273;
    --secondary-purple: #5a0a9e;
    --dark-purple: #1d0139;
    --gold: #d4af37;
    --cream: #f5f1e8;
    --light-gold: #e8d4a8;

    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #6c757d;
    --dark-gray: #343a40;
    --black: #000000;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-purple) 0%, var(--secondary-purple) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--gold) 0%, var(--light-gold) 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(57, 2, 115, 0.95) 0%, rgba(90, 10, 158, 0.95) 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;

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

    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-gold: 0 4px 20px rgba(212, 175, 55, 0.3);

    /* Animation */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-gray);
    background: var(--white);
    overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-purple);
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

/* ===================================
   Layout & Containers
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

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

@media (min-width: 768px) {
    section {
        padding: var(--spacing-xl) 0;
    }
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.25rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.nav-brand .logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
}

.nav-links {
    display: none;
    gap: var(--spacing-md);
    align-items: center;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

.nav-links a {
    font-weight: 500;
    color: var(--dark-gray);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a:not(.btn-primary-nav):hover {
    color: var(--primary-purple);
}

.nav-links a:not(.btn-primary-nav)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-secondary);
    transition: width var(--transition-base);
}

.nav-links a:not(.btn-primary-nav):hover::after {
    width: 100%;
}

.nav-links a.btn-primary-nav {
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50px;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.nav-links a.btn-primary-nav:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-purple);
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
}

/* Mobile menu open state - hamburger to X animation */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile navigation menu */
.nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    gap: 0;
    animation: slideDown 0.3s ease;
}

.nav-links.mobile-open a {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.nav-links.mobile-open a:last-child {
    border-bottom: none;
    margin-top: 0.5rem;
}

.nav-links.mobile-open a.btn-primary-nav {
    text-align: center;
    margin: 0.5rem 0 0;
}

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

/* Dark theme mobile menu for pages with dark backgrounds */
.nav-links.mobile-open.dark-theme {
    background: var(--dark-purple);
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.nav-links.mobile-open.dark-theme a {
    color: var(--cream);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.nav-links.mobile-open.dark-theme a:hover {
    color: var(--gold);
}

.nav-links.mobile-open.dark-theme a.btn-primary-nav {
    background: var(--gold);
    color: var(--dark-purple);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    z-index: -2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(212, 175, 55, 0.15) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.gradient-text {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--cream);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2.5rem;
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-block;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-secondary);
    color: var(--primary-purple);
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(140px, 100%), 1fr));
    gap: var(--spacing-sm);
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease 0.6s both;
}

@media (min-width: 768px) {
    .hero-stats {
        gap: var(--spacing-md);
    }
}

.stat {
    text-align: center;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

@media (min-width: 768px) {
    .stat {
        padding: var(--spacing-md);
        border-radius: 16px;
    }
}

.stat-number {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--gold);
    margin-bottom: 0.25rem;
}

@media (min-width: 768px) {
    .stat-number {
        font-size: 2.5rem;
        margin-bottom: 0.5rem;
    }
}

.stat-label {
    color: var(--cream);
    font-size: 0.8rem;
    font-weight: 500;
    line-height: 1.3;
}

@media (min-width: 768px) {
    .stat-label {
        font-size: 0.95rem;
    }
}

/* ===================================
   Benefits Section
   =================================== */
.benefits-section {
    background: var(--light-gray);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: var(--spacing-md);
}

.benefit-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.benefit-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gold);
}

.benefit-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: var(--gold);
}

.benefit-card h3 {
    color: var(--primary-purple);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.benefit-card p {
    color: var(--gray);
    line-height: 1.8;
    margin: 0;
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works-section {
    background: var(--white);
}

.steps-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.steps-container::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 40px;
    bottom: 40px;
    width: 2px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

@media (min-width: 768px) {
    .steps-container::before {
        left: 40px;
    }
}

.step {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    .step-number {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
}

.step-content {
    flex: 1;
    padding-top: 0.5rem;
}

.step-content h3 {
    color: var(--primary-purple);
    margin-bottom: var(--spacing-xs);
    font-size: 1.75rem;
}

.step-content p {
    color: var(--gray);
    line-height: 1.8;
    margin: 0;
}

/* ===================================
   Features Section
   =================================== */
.features-section {
    background: var(--light-gray);
}

.features-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.feature-highlight {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    align-items: center;
}

@media (min-width: 968px) {
    .feature-highlight {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }

    .feature-highlight.reverse {
        direction: rtl;
    }

    .feature-highlight.reverse > * {
        direction: ltr;
    }
}

.feature-visual {
    position: relative;
}

.visual-placeholder {
    width: 100%;
    height: 300px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.feature-details h3 {
    color: var(--primary-purple);
    margin-bottom: var(--spacing-sm);
    font-size: 2rem;
}

.feature-details p {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.feature-details ul {
    list-style: none;
    margin: var(--spacing-sm) 0;
    padding: 0;
}

.feature-details li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 0.75rem;
    color: var(--dark-gray);
}

.feature-details li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--gold);
    font-weight: 700;
    font-size: 1.25rem;
}

.feature-highlight-text {
    font-weight: 600;
    color: var(--secondary-purple);
    font-size: 1.125rem;
    margin-top: var(--spacing-sm);
}

/* ===================================
   Testimonials Section
   =================================== */
.testimonials-section {
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: var(--spacing-md);
}

.testimonial-card {
    background: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: 16px;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    border-color: var(--gold);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-stars {
    color: var(--gold);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.25rem;
}

.testimonial-text {
    color: var(--dark-gray);
    font-style: italic;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--gold);
    flex-shrink: 0;
}

.author-name {
    font-weight: 600;
    color: var(--primary-purple);
}

.author-role {
    font-size: 0.9rem;
    color: var(--gray);
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 30% 30%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(212, 175, 55, 0.15) 0%, transparent 50%);
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.cta-content > p {
    color: var(--cream);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
}

.cta-form form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 600px;
    margin: 0 auto var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.cta-form input[type="email"] {
    flex: 1;
    min-width: 250px;
    padding: 1rem 1.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    font-size: 1rem;
    color: var(--white);
    transition: all var(--transition-base);
}

.cta-form input[type="email"]::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.cta-form input[type="email"]:focus {
    outline: none;
    border-color: var(--gold);
    background: rgba(255, 255, 255, 0.15);
}

.cta-form button {
    border: none;
}

.cta-note {
    color: var(--cream);
    font-size: 0.9rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.cta-features {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    font-weight: 500;
}

.cta-feature svg {
    color: var(--gold);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--primary-purple);
    color: var(--cream);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 3fr;
    }
}

.footer-brand .logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--gold);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.footer-brand p {
    color: var(--cream);
    opacity: 0.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(130px, 100%), 1fr));
    gap: var(--spacing-md);
}

.footer-column h4 {
    color: var(--gold);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-primary);
    font-weight: 600;
}

.footer-column a {
    display: block;
    color: var(--cream);
    opacity: 0.8;
    margin-bottom: 0.5rem;
    transition: all var(--transition-base);
}

.footer-column a:hover {
    opacity: 1;
    color: var(--gold);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.footer-bottom p {
    color: var(--cream);
    opacity: 0.7;
    margin: 0;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===================================
   Utilities
   =================================== */
.text-center {
    text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

/* ===================================
   Responsive Adjustments
   =================================== */
@media (max-width: 767px) {
    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: var(--spacing-lg);
        align-items: flex-start;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        text-align: center;
    }

    .benefits-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .cta-form form {
        flex-direction: column;
    }

    .cta-form input[type="email"] {
        width: 100%;
    }
}

/* ===================================
   Accessibility
   =================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 3px;
}