/* ==========================================================================
   English After School – Main Theme Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colour palette */
    --color-primary:       #2563eb;   /* Blue – calm, trustworthy */
    --color-primary-dark:  #1e40af;
    --color-primary-light: #dbeafe;
    --color-secondary:     #f59e0b;   /* Amber – warm, friendly */
    --color-secondary-dark:#d97706;
    --color-accent:        #10b981;   /* Green – growth */
    --color-accent-light:  #d1fae5;
    --color-surface:       #f8fafc;
    --color-bg:            #ffffff;
    --color-text:          #1e293b;
    --color-text-muted:    #64748b;
    --color-border:        #e2e8f0;
    --color-white:         #ffffff;

    /* Typography */
    --font-heading: 'Nunito', system-ui, -apple-system, sans-serif;
    --font-body:    'Nunito Sans', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --space-xs:   0.25rem;
    --space-sm:   0.5rem;
    --space-md:   1rem;
    --space-lg:   1.5rem;
    --space-xl:   2rem;
    --space-2xl:  3rem;
    --space-3xl:  5rem;

    /* Layout */
    --container-max: 1100px;
    --header-h:      72px;

    /* Border radius */
    --radius-sm:  8px;
    --radius-md:  12px;
    --radius-lg:  20px;
    --radius-xl:  32px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md:  0 4px 12px rgba(0,0,0,.10);
    --shadow-lg:  0 10px 30px rgba(0,0,0,.12);

    /* Transitions */
    --transition: 0.25s 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);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

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

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

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

a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: 4px;
}

ul {
    list-style: none;
}

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

/* --------------------------------------------------------------------------
   Layout helpers
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--space-lg);
}

.section {
    padding-block: var(--space-3xl);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 560px;
    margin-inline: auto;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

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

.btn--primary:hover,
.btn--primary:focus {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
}

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

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

.btn--sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    height: 100%;
    gap: var(--space-xl);
}

/* Branding */
.site-branding {
    flex-shrink: 0;
}

.site-title-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.site-title-icon {
    font-size: 1.5rem;
}

.site-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--color-text);
    white-space: nowrap;
}

/* Primary navigation */
.site-nav {
    flex: 1;
}

.nav-list {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
    justify-content: center;
}

.nav-list a {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text);
    transition: color var(--transition);
    position: relative;
    padding-bottom: 2px;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition);
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

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

/* Language switcher */
.lang-switcher {
    display: flex;
    gap: var(--space-xs);
    flex-shrink: 0;
}

.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    transition: background var(--transition), color var(--transition);
    text-decoration: none;
    border: 1.5px solid var(--color-border);
}

.lang-btn:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.lang-btn--active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.lang-btn--active:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
}

/* Mobile toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
}

.nav-toggle__bar {
    display: block;
    width: 100%;
    height: 2.5px;
    background: var(--color-text);
    border-radius: var(--radius-full);
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(8.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-8.75px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.section--hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #eff6ff 0%, #fafafa 50%, #fef9ee 100%);
    padding-top: var(--header-h);
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.hero-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

.hero-shape--1 {
    width: 500px;
    height: 500px;
    background: var(--color-primary);
    top: -200px;
    right: -100px;
}

.hero-shape--2 {
    width: 300px;
    height: 300px;
    background: var(--color-secondary);
    bottom: 0;
    left: -80px;
}

.hero-shape--3 {
    width: 200px;
    height: 200px;
    background: var(--color-accent);
    top: 40%;
    left: 30%;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--space-3xl);
    padding-block: var(--space-3xl);
}

.hero-text {
    flex: 1;
    min-width: 0;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-secondary-dark);
    background: #fef3c7;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    line-height: 1.15;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
    max-width: 520px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-visual {
    flex-shrink: 0;
}

.hero-card {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    width: 260px;
}

.hero-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 110px;
    height: 110px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    font-size: 3rem;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition);
    animation: float 3s ease-in-out infinite;
}

.hero-card__icon:nth-child(2) { animation-delay: 0.5s; }
.hero-card__icon:nth-child(3) { animation-delay: 1s; }
.hero-card__icon:nth-child(4) { animation-delay: 1.5s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-8px); }
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    color: var(--color-primary);
    font-size: 1.1rem;
    animation: bounce 2s infinite;
    text-decoration: none;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(8px); }
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.section--about {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.about-image__frame {
    position: relative;
    width: 320px;
}

.about-image__placeholder {
    width: 320px;
    height: 380px;
    background: linear-gradient(135deg, var(--color-primary-light), #e0e7ff);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    box-shadow: var(--shadow-lg);
}

.about-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--color-secondary);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.about-badge__years {
    display: block;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.75rem;
    line-height: 1;
}

.about-badge__label {
    font-size: 0.8rem;
    font-weight: 600;
    opacity: 0.9;
}

.about-text {
    padding-left: var(--space-lg);
}

.about-para {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.75;
}

.about-para strong {
    color: var(--color-text);
    font-weight: 700;
}

.about-stats {
    display: flex;
    gap: var(--space-2xl);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

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

.about-stat__num {
    display: block;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.75rem;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 4px;
}

.about-stat__label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 600;
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.section--services {
    background: var(--color-surface);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--color-border);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.service-card__icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-lg);
    display: block;
}

.service-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.service-card__desc {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Why Us Section
   -------------------------------------------------------------------------- */
.section--why {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.section--why .section-title {
    color: var(--color-white);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
}

.why-item {
    text-align: center;
    padding: var(--space-2xl);
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.15);
    transition: background var(--transition), transform var(--transition);
}

.why-item:hover {
    background: rgba(255,255,255,0.14);
    transform: translateY(-4px);
}

.why-item__icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    display: block;
}

.why-item__title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.why-item__desc {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.8);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.section--contact {
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.contact-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: box-shadow var(--transition), transform var(--transition);
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.contact-card__icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    display: block;
}

.contact-card__label {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.contact-card__value {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.contact-card__value--link {
    color: var(--color-primary);
    transition: color var(--transition);
}

.contact-card__value--link:hover {
    color: var(--color-primary-dark);
}

.contact-card__value--secondary {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.contact-card__actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background: var(--color-text);
    color: rgba(255,255,255,0.85);
    padding-block: var(--space-3xl) var(--space-xl);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.footer-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}

.footer-tagline {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

.footer-contact {
    text-align: right;
}

.footer-phone {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: rgba(255,255,255,0.85);
    font-size: 1rem;
    font-weight: 600;
    transition: color var(--transition);
    margin-bottom: var(--space-sm);
}

.footer-phone:hover {
    color: var(--color-secondary);
}

.footer-address {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    margin-top: var(--space-sm);
}

.footer-bottom {
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

/* --------------------------------------------------------------------------
   Responsive – Tablet (≤ 900px)
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .why-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin-inline: auto;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 440px;
        margin-inline: auto;
    }

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

    .about-text {
        padding-left: 0;
    }

    .about-image {
        order: -1;
    }

    .footer-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

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

/* --------------------------------------------------------------------------
   Responsive – Mobile (≤ 640px)
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
    :root {
        --space-3xl: 3.5rem;
    }

    /* Header */
    .site-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        padding: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform var(--transition), opacity var(--transition);
        z-index: 999;
    }

    .site-nav.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--space-lg);
        align-items: flex-start;
    }

    .nav-list a {
        font-size: 1.1rem;
    }

    .nav-toggle {
        display: flex;
    }

    .lang-switcher {
        margin-left: auto;
    }

    /* Hero */
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-2xl);
    }

    .hero-text {
        order: 1;
    }

    .hero-visual {
        order: 2;
    }

    .hero-subtitle {
        max-width: 100%;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-card {
        width: 220px;
    }

    .hero-card__icon {
        width: 90px;
        height: 90px;
        font-size: 2.5rem;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-inline: auto;
    }

    /* About stats */
    .about-stats {
        flex-wrap: wrap;
        gap: var(--space-lg);
        justify-content: center;
    }

    /* Contact card actions */
    .contact-card__actions {
        flex-direction: row;
        justify-content: center;
    }
}

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

    html {
        scroll-behavior: auto;
    }
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-sm);
    font-weight: 700;
    z-index: 9999;
    transition: top 0.2s;
}

.skip-link:focus {
    top: var(--space-sm);
    color: var(--color-white);
}