/* style.css - Marketing Landing Page */
:root {
    /* Brand Colors (Education/Enterprise) */
    --primary: #10B981; /* Emerald Green - Trust, Success */
    --primary-dark: #059669;
    --primary-light: #D1FAE5;
    
    --secondary: #1E1B4B; /* Deep Indigo - Professional, Stable */
    --secondary-light: #312E81;
    
    --bg-main: #F8FAFC; /* Slate 50 - Very light gray/blue */
    --bg-card: #FFFFFF;
    
    --text-main: #334155; /* Slate 700 */
    --text-muted: #64748B; /* Slate 500 */
    --text-heading: #0F172A; /* Slate 900 */
    
    /* Layout */
    --container-width: 1100px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
}

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

body {
    font-family: 'Cairo', 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--text-heading);
    font-weight: 800;
    line-height: 1.2;
}

h1 { font-size: 3rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.25rem; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
p { margin-bottom: 1rem; font-size: 1.1rem; color: var(--text-muted); }

/* Layout Containers */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

/* Header & Nav */
.header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    transition: color 0.2s ease;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.39);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.23);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-light);
    border-color: var(--secondary-light);
    color: white;
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    padding-top: 150px;
    padding-bottom: 80px;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
    opacity: 0.6;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--secondary);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-inline: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid rgba(0,0,0,0.03);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background-color: var(--primary-light);
    color: var(--primary-dark);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

/* Pricing Section */
.pricing {
    background-color: white;
}

.pricing-header {
    text-align: center;
    margin-bottom: 4rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0,0,0,0.05);
    position: relative;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: scale(1.02);
}

.pricing-card.popular {
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-lg);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 700;
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--secondary);
    margin: 1.5rem 0;
    display: flex;
    align-items: baseline;
    justify-content: center;
}

.price span {
    font-size: 1.25rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-right: 0.5rem; /* For RTL */
}

.pricing-features {
    list-style: none;
    margin: 2rem 0;
    flex-grow: 1;
}

.pricing-features li {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.pricing-features li svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
    margin-left: 0.75rem; /* For RTL */
    flex-shrink: 0;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    max-width: 400px;
    width: 90%;
    text-align: center;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    position: absolute;
    top: 1rem;
    right: 1rem;
    color: var(--text-muted);
}

/* Footer */
.footer {
    background-color: var(--secondary);
    color: white;
    padding: 4rem 0 2rem 0;
    text-align: center;
}

.footer p {
    color: #94A3B8;
    margin-bottom: 0;
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    .nav-links { display: none; } /* Simplified for MVP */
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { width: 100%; }
}