/* ===== Variables ===== */
:root {
    --color-black: #0a0a0a;
    --color-white: #ffffff;
    --color-green: #3d9a3d;
    --color-green-dark: #2d7a2d;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e8e8e8;
    --color-gray-400: #999;
    --color-gray-600: #666;
    --color-gray-800: #333;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --header-height: 72px;
    --transition: 0.3s ease;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.18);
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--color-gray-800);
    background: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.hidden { display: none !important; }

/* ===== Skip Link ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--color-green);
    color: var(--color-white);
    padding: 8px 16px;
    z-index: 9999;
    border-radius: 4px;
}
.skip-link:focus { top: 16px; }

/* ===== Brand ===== */
.brand {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}
.brand-logo {
    display: block;
    height: 44px;
    width: auto;
    max-width: 220px;
    object-fit: contain;
}
.brand-logo--footer {
    height: 52px;
    max-width: 260px;
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-black);
    height: var(--header-height);
}
.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.desktop-nav {
    display: none;
    align-items: center;
    gap: 28px;
}
.desktop-nav > a,
.nav-dropdown-toggle {
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity var(--transition);
    display: flex;
    align-items: center;
    gap: 4px;
}
.desktop-nav > a:hover,
.nav-dropdown-toggle:hover { opacity: 0.75; }

.nav-dropdown { position: relative; }
.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-white);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    padding: 12px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
}
.nav-dropdown-menu a {
    color: var(--color-gray-800);
    padding: 8px 20px;
    font-size: 0.85rem;
    transition: background var(--transition);
}
.nav-dropdown-menu a:hover { background: var(--color-gray-100); }

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    display: none;
    gap: 4px;
}
.lang-btn {
    color: var(--color-gray-400);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all var(--transition);
}
.lang-btn.active,
.lang-btn:hover {
    color: var(--color-white);
}
.lang-btn.active { border-bottom: 2px solid var(--color-green); }

.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Mobile Menu ===== */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--color-black);
    z-index: 999;
    display: flex;
    flex-direction: column;
    padding: 24px;
    transform: translateX(100%);
    transition: transform var(--transition);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
}
.menu-close {
    color: var(--color-white);
    font-size: 2.5rem;
    line-height: 1;
    padding: 4px;
}
.mobile-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    flex: 1;
}
.mobile-nav a {
    color: var(--color-white);
    font-size: 1.25rem;
    font-weight: 600;
}
.mobile-contact {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}
.mobile-contact a {
    color: var(--color-white);
    font-weight: 600;
    font-size: 1rem;
}
.mobile-lang {
    display: flex;
    justify-content: center;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
}
.hero-bg {
    position: absolute;
    inset: 0;
    background: url('https://images.unsplash.com/photo-1481627834876-b7833e8f5570?w=1920&q=80') center/cover no-repeat;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.45) 100%);
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px 80px;
    width: 100%;
    display: grid;
    gap: 48px;
    align-items: center;
}
.hero-text { color: var(--color-white); }
.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    min-height: 2.4em;
}
.hero-rotating {
    display: inline-block;
    min-height: 1.2em;
    transition: opacity 0.45s ease;
}
.hero-subtitle {
    font-size: 1.1rem;
    max-width: 560px;
    opacity: 0.9;
    line-height: 1.7;
}

/* ===== Consultation Card ===== */
.consultation-card {
    background: var(--color-white);
    padding: 32px;
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    max-width: 480px;
}
.card-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.card-subtitle {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    margin-bottom: 4px;
}
.card-subtitle span { text-decoration: underline; }
.card-cta {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 24px;
}
.consultation-form,
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.consultation-form input,
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    border: none;
    background: var(--color-gray-100);
    border-radius: 2px;
    color: var(--color-gray-800);
    transition: background var(--transition);
}
.consultation-form input:focus,
.contact-form input:focus,
.contact-form textarea:focus {
    outline: 2px solid var(--color-green);
    background: var(--color-white);
}
.phone-input {
    display: flex;
    gap: 8px;
}
.phone-input select {
    padding: 14px 8px;
    background: var(--color-gray-100);
    border: none;
    border-radius: 2px;
    min-width: 80px;
}
.phone-input input { flex: 1; }

.btn-primary {
    background: var(--color-green);
    color: var(--color-white);
    padding: 16px 24px;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 2px;
    transition: background var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.btn-primary:hover { background: var(--color-green-dark); }

.form-note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-gray-400);
}
.form-privacy {
    font-size: 0.75rem;
    color: var(--color-gray-400);
    text-align: center;
    line-height: 1.4;
}
.form-success {
    text-align: center;
    padding: 24px;
}
.form-success p {
    margin-top: 12px;
    font-weight: 600;
    color: var(--color-green);
}

/* ===== Sections ===== */
.section {
    padding: 80px 0;
    scroll-margin-top: 80px;
}
.section-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-green);
    margin-bottom: 12px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-black);
}
.section-desc {
    font-size: 1.05rem;
    color: var(--color-gray-600);
    max-width: 700px;
    margin-bottom: 48px;
}

/* ===== About ===== */
.about-section { background: var(--color-gray-100); }
.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 800px;
    margin-bottom: 48px;
    color: var(--color-gray-600);
}
.stats-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.stat {
    text-align: center;
    padding: 24px;
    background: var(--color-white);
    border-radius: 8px;
    box-shadow: var(--shadow);
}
.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-green);
}
.stat-label {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    margin-top: 4px;
}

/* ===== Services ===== */
.services-grid {
    display: grid;
    gap: 24px;
}
.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: 8px;
    padding: 32px;
    transition: all var(--transition);
}
.service-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--color-green);
    transform: translateY(-2px);
}
.service-icon {
    width: 56px;
    height: 56px;
    background: rgba(61, 154, 61, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-green);
    margin-bottom: 20px;
}
.service-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.service-card p,
.service-card li {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    line-height: 1.6;
}
.service-card ul { margin-top: 8px; }
.service-card li {
    padding: 4px 0 4px 20px;
    position: relative;
}
.service-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-green);
    font-weight: 700;
}
.service-note {
    margin-top: 12px;
    font-style: italic;
    font-size: 0.9rem !important;
}

/* ===== Education ===== */
.education-section { background: var(--color-black); color: var(--color-white); }
.education-section .section-label { color: var(--color-green); }
.education-section .section-title { color: var(--color-white); }
.education-section .section-desc { color: rgba(255,255,255,0.7); }

.education-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.edu-filter {
    padding: 8px 20px;
    border-radius: 24px;
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.7);
    border: 1px solid rgba(255,255,255,0.15);
    transition: all var(--transition);
}

.edu-filter.active,
.edu-filter:hover {
    background: var(--color-green);
    color: var(--color-white);
    border-color: var(--color-green);
}

.education-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 48px;
}

.edu-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 28px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.edu-card:hover {
    border-color: var(--color-green);
    transform: translateY(-4px);
    background: rgba(61, 154, 61, 0.08);
}

.edu-card.hidden { display: none; }

.edu-badge {
    display: inline-block;
    font-weight: 800;
    font-size: 0.85rem;
    letter-spacing: 1px;
    padding: 6px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    width: fit-content;
}

.edu-badge--ielts { background: #e11d48; color: #fff; }
.edu-badge--toefl { background: #2563eb; color: #fff; }
.edu-badge--sat { background: #7c3aed; color: #fff; }
.edu-badge--gre { background: #0891b2; color: #fff; }
.edu-badge--gmat { background: #ea580c; color: #fff; }
.edu-badge--duolingo { background: #16a34a; color: #fff; }
.edu-badge--pte { background: #0d9488; color: #fff; }
.edu-badge--cambridge { background: #b45309; color: #fff; }

.edu-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: 6px;
}

.edu-target {
    font-size: 0.8rem;
    color: var(--color-green);
    font-weight: 600;
    margin-bottom: 12px;
}

.edu-card > p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.65);
    line-height: 1.6;
    margin-bottom: 12px;
}

.edu-card ul {
    flex: 1;
    margin-bottom: 20px;
}

.edu-card li {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
    padding: 4px 0 4px 18px;
    position: relative;
}

.edu-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-green);
}

.edu-cta {
    display: inline-block;
    text-align: center;
    padding: 12px 24px;
    background: transparent;
    border: 2px solid var(--color-green);
    color: var(--color-green);
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: 4px;
    transition: all var(--transition);
}

.edu-cta:hover {
    background: var(--color-green);
    color: var(--color-white);
}

.education-banner {
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: flex-start;
    background: linear-gradient(135deg, rgba(61,154,61,0.2) 0%, rgba(61,154,61,0.05) 100%);
    border: 1px solid rgba(61,154,61,0.3);
    border-radius: 12px;
    padding: 32px;
}

.banner-content h3 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    margin-bottom: 8px;
}

.banner-content p {
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

.banner-btn { width: auto; white-space: nowrap; }

/* ===== Process ===== */
.process-section { background: var(--color-black); color: var(--color-white); }
.process-section .section-label { color: var(--color-green); }
.process-section .section-title { color: var(--color-white); }
.process-timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
}
.process-timeline::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255,255,255,0.15);
}
.process-step {
    display: flex;
    gap: 24px;
    padding: 32px 0;
    position: relative;
}
.step-number {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--color-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    z-index: 1;
}
.step-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.step-content p {
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

/* ===== Countries ===== */
.countries-section { background: var(--color-gray-100); }
.countries-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.country-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    background: var(--color-white);
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition);
    cursor: default;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.country-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.country-card.active {
    border: 2px solid var(--color-green);
    background: rgba(61, 154, 61, 0.05);
}
.country-flag { font-size: 1.5rem; }

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    gap: 48px;
    margin-bottom: 48px;
}
.contact-info p {
    color: var(--color-gray-600);
    margin-bottom: 24px;
}
.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    color: var(--color-gray-800);
    transition: color var(--transition);
}
.contact-item:hover { color: var(--color-green); }
.contact-form {
    background: var(--color-gray-100);
    padding: 32px;
    border-radius: 8px;
}
.map-container {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-black);
    color: var(--color-white);
    padding: 64px 0 0;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    gap: 40px;
}
.footer-brand p {
    color: var(--color-gray-400);
    margin-top: 16px;
    font-size: 0.9rem;
}
.footer-links h4,
.footer-social h4 {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 16px;
    color: var(--color-gray-400);
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    color: var(--color-white);
    font-size: 0.95rem;
    transition: color var(--transition);
}
.footer-links a:hover { color: var(--color-green); }
.social-icons {
    display: flex;
    gap: 16px;
}
.social-icons a {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: all var(--transition);
}
.social-icons a:hover {
    background: var(--color-green);
    border-color: var(--color-green);
}
.footer-bottom {
    max-width: 1200px;
    margin: 48px auto 0;
    padding: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-gray-400);
}
.footer-bottom a { color: var(--color-gray-400); }
.footer-bottom a:hover { color: var(--color-white); }

/* ===== FAB ===== */
.fab-call {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: var(--color-green);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(61, 154, 61, 0.4);
    z-index: 900;
    transition: all var(--transition);
    animation: pulse 2s infinite;
}
.fab-call:hover {
    transform: scale(1.1);
    background: var(--color-green-dark);
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 4px 16px rgba(61, 154, 61, 0.4); }
    50% { box-shadow: 0 4px 24px rgba(61, 154, 61, 0.6); }
}

/* ===== Responsive ===== */
@media (min-width: 768px) {
    .desktop-nav { display: flex; }
    .lang-switch { display: flex; }
    .menu-toggle { display: none; }
    .hero-content {
        grid-template-columns: 1fr 1fr;
        padding: 80px 24px;
    }
    .consultation-card { margin-left: auto; }
    .stats-row { grid-template-columns: repeat(4, 1fr); }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .education-grid { grid-template-columns: repeat(2, 1fr); }
    .education-banner { flex-direction: row; align-items: center; justify-content: space-between; }
    .countries-grid { grid-template-columns: repeat(3, 1fr); }
    .contact-grid { grid-template-columns: 1fr 1fr; align-items: start; }
    .footer-inner { grid-template-columns: 2fr 1fr 1fr; }
    .footer-bottom { flex-direction: row; justify-content: space-between; }
}

@media (min-width: 1024px) {
    .services-grid { grid-template-columns: repeat(3, 1fr); }
    .education-grid { grid-template-columns: repeat(4, 1fr); }
    .countries-grid { grid-template-columns: repeat(4, 1fr); }
}