/* ============================================
   KALIANIA - Private Math School
   Eye-Friendly, Minimalist Design
   ============================================ */

/* Font Import - Couture with elegant fallback */
@font-face {
    font-family: 'Couture';
    src: url('https://fonts.cdnfonts.com/s/15356/Couture.woff') format('woff');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;500;600&display=swap');

/* ============================================
   CSS Variables - Eye Health Optimized
   ============================================ */
:root {
    --font-primary: 'Couture', 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Cormorant Garamond', Georgia, serif;
    
    /* Softer contrast for reduced eye strain */
    --color-bg: #fafafa;
    --color-bg-alt: #f5f5f5;
    --color-text: #222222;
    --color-text-light: #3a3a3a;
    --color-text-muted: #666666;
    --color-border: #e0e0e0;
    --color-border-light: #ebebeb;
    
    /* 8px grid spacing system */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 32px;
    --spacing-lg: 64px;
    --spacing-xl: 96px;
    
    --max-width: 1000px;
    --text-width: 640px;
    --transition: 0.3s ease;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography - Optimized for Readability
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    line-height: 1.4;
}

h1 {
    font-size: 2rem;
    letter-spacing: 0.25em;
}

h2 {
    font-size: 0.9375rem;
    letter-spacing: 0.18em;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 0.875rem;
    letter-spacing: 0.12em;
    margin-bottom: var(--spacing-sm);
}

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

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

a:hover {
    opacity: 0.7;
}

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

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

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

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

.section-intro {
    text-align: center;
    max-width: var(--text-width);
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-light);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-bg);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border-light);
}

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

.nav-logo {
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    font-family: var(--font-primary);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.nav-cta {
    border: 1px solid var(--color-text);
    padding: 10px 16px;
    transition: all var(--transition);
}

.nav-cta:hover {
    background: var(--color-text);
    color: var(--color-bg);
    opacity: 1;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 1px;
    background: var(--color-text);
    margin: 5px 0;
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
}

.hero-title {
    font-size: 2.5rem;
    letter-spacing: 0.4em;
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-family: var(--font-primary);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-description {
    max-width: 480px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-light);
    animation: fadeInUp 1s ease 0.4s both;
}

.hero .btn {
    animation: fadeInUp 1s ease 0.6s both;
}

.hero-highlights {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.8s both;
}

.highlight {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-primary);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.highlight-icon {
    font-size: 0.5rem;
}

/* ============================================
   Button
   ============================================ */
.btn {
    display: inline-block;
    font-family: var(--font-primary);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 16px 32px;
    border: 1px solid var(--color-text);
    background: transparent;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition);
}

.btn:hover {
    background: var(--color-text);
    color: var(--color-bg);
    opacity: 1;
}

/* ============================================
   About Section
   ============================================ */
.about-content {
    max-width: var(--text-width);
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    max-width: 100%;
}

.about-signature {
    font-style: italic;
    color: var(--color-text);
    margin-top: var(--spacing-lg);
}

/* ============================================
   Services Section - Centered Grid
   ============================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.service-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border-light);
    transition: border-color var(--transition);
    text-align: center;
}

.service-card:hover {
    border-color: var(--color-text);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-text-light);
    margin-bottom: 0;
    max-width: 100%;
}

/* ============================================
   Curriculum Section
   ============================================ */
.curriculum-container {
    max-width: 700px;
    margin: 0 auto;
}

.grade-card {
    border-bottom: 1px solid var(--color-border-light);
}

.grade-card:last-child {
    border-bottom: none;
}

.grade-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) 0;
    cursor: pointer;
    transition: opacity var(--transition);
}

.grade-header:hover {
    opacity: 0.7;
}

.grade-label {
    font-family: var(--font-primary);
    font-size: 0.8125rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    flex: 1;
}

.grade-ages {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-right: var(--spacing-md);
}

.grade-toggle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    width: 24px;
    text-align: center;
    transition: transform var(--transition);
}

.grade-card.active .grade-toggle {
    transform: rotate(45deg);
}

.grade-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
}

.grade-card.active .grade-content {
    max-height: 1000px;
}

.grade-content ul {
    list-style: none;
    padding: 0 0 var(--spacing-md) var(--spacing-sm);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.grade-content li {
    font-size: 0.875rem;
    color: var(--color-text-light);
    padding-left: 16px;
    position: relative;
}

.grade-content li::before {
    content: '·';
    position: absolute;
    left: 0;
    color: var(--color-text-muted);
}

/* ============================================
   Pricing Section - Centered Grid
   ============================================ */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

.pricing-card {
    padding: var(--spacing-lg) var(--spacing-md);
    border: 1px solid var(--color-border-light);
    text-align: center;
}

.pricing-card.featured {
    border-color: var(--color-text);
}

.pricing-card h3 {
    margin-bottom: var(--spacing-sm);
}

.price {
    font-family: var(--font-primary);
    font-size: 2rem;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.price span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.pricing-card > p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    max-width: 100%;
}

.pricing-card ul {
    list-style: none;
    text-align: left;
}

.pricing-card li {
    font-size: 0.875rem;
    color: var(--color-text-light);
    padding: 8px 0;
    border-top: 1px solid var(--color-border-light);
}

.pricing-info {
    text-align: center;
    max-width: 480px;
    margin: 0 auto var(--spacing-lg);
}

.pricing-info h3 {
    margin-bottom: var(--spacing-xs);
}

.pricing-info p {
    color: var(--color-text-light);
    max-width: 100%;
}

.discounts {
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.discounts h3 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.discount-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--color-border-light);
    border: 1px solid var(--color-border-light);
}

.discount-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--color-bg-alt);
    font-size: 0.875rem;
}

.discount-label {
    color: var(--color-text-light);
}

.discount-value {
    font-family: var(--font-primary);
    letter-spacing: 0.05em;
}

.payment-note {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ============================================
   Financial Aid Section - Centered Grid
   ============================================ */
.aid-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.aid-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border-light);
    text-align: center;
}

.aid-card h3 {
    margin-bottom: var(--spacing-sm);
}

.aid-card p {
    color: var(--color-text-light);
    margin-bottom: 0;
    max-width: 100%;
}

.aid-cta {
    text-align: center;
    font-style: italic;
    color: var(--color-text-light);
}

/* ============================================
   How It Works Section - Centered Grid
   ============================================ */
.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.step {
    text-align: center;
    padding: var(--spacing-md);
}

.step-number {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.step h3 {
    margin-bottom: var(--spacing-sm);
}

.step p {
    color: var(--color-text-light);
    margin-bottom: 0;
    max-width: 100%;
}

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

/* ============================================
   Contact Section
   ============================================ */
.contact-form {
    max-width: 480px;
    margin: 0 auto var(--spacing-md);
}

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

.form-group label {
    display: block;
    font-family: var(--font-primary);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23222222' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.btn-submit {
    width: 100%;
    margin-top: var(--spacing-sm);
}

.hidden {
    display: none;
}

.contact-note {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-style: italic;
}

.contact-email {
    text-align: center;
    margin-top: var(--spacing-sm);
}

.contact-email a {
    font-family: var(--font-primary);
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

.footer-logo {
    font-family: var(--font-primary);
    font-size: 1rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
}

.footer-brand p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.footer-policies h4 {
    font-size: 0.75rem;
    margin-bottom: var(--spacing-sm);
}

.footer-policies p {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 8px;
    max-width: 100%;
}

.footer-policies strong {
    font-weight: 500;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.footer-bottom p {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .aid-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 48px;
        --spacing-xl: 72px;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border-light);
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero-title {
        font-size: 1.75rem;
        letter-spacing: 0.25em;
    }
    
    .hero-highlights {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .aid-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .discount-grid {
        grid-template-columns: 1fr;
    }
    
    .grade-content ul {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-brand {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
        letter-spacing: 0.2em;
    }
    
    .section-title {
        font-size: 0.8125rem;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 0.6875rem;
    }
}