/* ==========================================
   Kazakhstan Mektebi №17 - Global Styles
   ========================================== */

/* CSS Variables - Design System */
:root {
    /* Colors */
    --primary-color: #2E7D32; /* Green */
    --primary-dark: #1B5E20;
    --primary-light: #4CAF50;
    --secondary-color: #1976D2; /* Blue */
    --secondary-dark: #0D47A1;
    --secondary-light: #42A5F5;
    --accent-color: #FFC107;
    --text-dark: #212121;
    --text-medium: #424242;
    --text-light: #757575;
    --bg-white: #FFFFFF;
    --bg-light: #F5F5F5;
    --bg-gradient: linear-gradient(135deg, #1976D2 0%, #2E7D32 100%);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
    
    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --line-height: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Container */
    --container-max-width: 1200px;
    --content-max-width: 700px;
}

/* ==========================================
   Reset & Base Styles
   ========================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height);
    color: var(--text-dark);
    background-color: var(--bg-white);
}

/* ==========================================
   Typography
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    max-width: var(--content-max-width);
    margin-bottom: var(--spacing-sm);
    color: var(--text-medium);
}

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

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

/* ==========================================
   Layout & Container
   ========================================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

.section-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    color: var(--text-light);
}

/* ==========================================
   Header & Navigation
   ========================================== */

.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
}

.logo-icon {
    font-size: 2rem;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    font-weight: var(--font-weight-normal);
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

/* ==========================================
   Hero Section
   ========================================== */

.hero {
    background: var(--bg-gradient);
    color: var(--bg-white);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.unsplash.com/photo-1497633762265-9d179a990aa6?w=1200') center/cover;
    opacity: 0.15;
    z-index: 0;
}

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

.hero h1 {
    color: var(--bg-white);
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero-tagline {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
    font-family: var(--font-family);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--bg-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    color: var(--bg-white);
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

/* ==========================================
   Cards & Grid
   ========================================== */

.grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.card {
    background-color: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
}

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

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.card-description {
    color: var(--text-medium);
    max-width: 100%;
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

/* ==========================================
   Statistics Section
   ========================================== */

.stats {
    background: var(--bg-gradient);
    color: var(--bg-white);
    padding: var(--spacing-xxl) 0;
}

.stats-grid {
    display: grid;
    gap: var(--spacing-lg);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--bg-white);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ==========================================
   CTA Section
   ========================================== */

.cta-section {
    background-color: var(--bg-light);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    background-color: var(--text-dark);
    color: var(--bg-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xs);
}

.footer-section a:hover {
    color: var(--primary-light);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-disclaimer {
    background-color: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ==========================================
   Cookie Banner
   ========================================== */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--text-dark);
    color: var(--bg-white);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.cookie-text {
    flex: 1;
    font-size: 0.9rem;
}

.cookie-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ==========================================
   Form Styles
   ========================================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid #E0E0E0;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ==========================================
   Responsive Design
   ========================================== */

/* Mobile (default - 1 column) */
.grid {
    grid-template-columns: 1fr;
}

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

.footer-content {
    grid-template-columns: 1fr;
}

/* Tablet (2 columns) */
@media (min-width: 768px) {
    h1 {
        font-size: 3rem;
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cookie-content {
        flex-direction: row;
    }
}

/* Desktop (3 columns) */
@media (min-width: 1024px) {
    .grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Mobile Menu */
@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }
    
    .nav.active {
        transform: translateY(0);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-tagline {
        font-size: 1rem;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-actions {
        justify-content: center;
    }
}

/* ==========================================
   Utility Classes
   ========================================== */

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

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

.bg-light {
    background-color: var(--bg-light);
}

.bg-white {
    background-color: var(--bg-white);
}