/* 
  HAPPY SCHOOL - Design System
  Author: Antigravity (Senior UI Engineer)
*/

@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300..800;1,300..800&family=Poppins:wght@400;500;600;700;800&display=swap');

:root {
    /* Colors */
    --primary-blue: #1a73e8;
    --primary-blue-dark: #1557b0;
    --primary-blue-light: #e8f0fe;
    --secondary-green: #22c55e;
    --secondary-green-dark: #16a34a;
    --accent-yellow: #facc15;
    --accent-yellow-dark: #eab308;
    
    /* Neutral */
    --white: #ffffff;
    --off-white: #f8fafc;
    --light-gray: #f1f5f9;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    
    /* Layout */
    --container-max-width: 1200px;
    --header-height: 80px;
    --border-radius-lg: 2rem;
    --border-radius-md: 1rem;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-premium: 0 20px 40px rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Layout Components */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: 5rem 0;
}

@media (max-width: 768px) {
    .section-padding {
        padding: 3rem 0;
    }
}

/* Typography Helpers */
.text-center { text-align: center; }
.text-primary { color: var(--primary-blue); }
.text-secondary { color: var(--secondary-green); }
.text-accent { color: var(--accent-yellow); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-blue-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-green-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-accent {
    background-color: var(--accent-yellow);
    color: var(--text-dark);
}

.btn-accent:hover {
    background-color: var(--accent-yellow-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    background-color: var(--primary-blue);
    color: var(--white);
    transform: translateY(-3px);
}

/* Header */
.main-header {
    height: var(--header-height);
    background-color: var(--white);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary-blue);
    gap: 0.5rem;
}

.logo img {
    height: 48px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-blue);
}

.nav-actions {
    display: flex;
    gap: 1rem;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 1024px) {
    .nav-menu {
        display: none; /* Will implement mobile menu via JS/CSS */
    }
    .nav-actions {
        display: none;
    }
    .mobile-toggle {
        display: block;
    }
}

/* Sticky WhatsApp */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: #25d366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: var(--transition-smooth);
}

.whatsapp-float:hover {
    transform: scale(1.1) rotate(10deg);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius-md);
    font-family: inherit;
    transition: var(--transition-smooth);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
    border: 1px solid var(--light-gray);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-premium);
}

/* Specific Section Styles Preview (Index) */
.hero {
    background: linear-gradient(135deg, var(--primary-blue-light) 0%, #fff 100%);
    padding: 4rem 0;
    min-height: 500px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background-color: var(--accent-yellow);
    color: var(--text-dark);
    padding: 0.4rem 1.2rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

.hero-image img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-image {
        order: -1;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-btns {
        justify-content: center;
    }
}

/* Footer */
.main-footer {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 5rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
}

.footer-logo {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-text {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.social-icon:hover {
    background-color: var(--accent-yellow);
    color: var(--text-dark);
}

.footer-head {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a:hover {
    color: var(--accent-yellow);
    padding-left: 5px;
}

.footer-bottom {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}