/* ===== CSS Variables ===== */
:root {
    --primary: #2563EB;
    --primary-dark: #1E40AF;
    --primary-light: #3B82F6;
    --secondary: #F5F5F5;
    --white: #FFFFFF;
    --grey-50: #F8FAFC;
    --grey-100: #F9FAFB;
    --grey-200: #E5E7EB;
    --grey-300: #D1D5DB;
    --grey-400: #9CA3AF;
    --grey-500: #6B7280;
    --grey-600: #4B5563;
    --grey-700: #374151;
    --grey-800: #1F2937;
    --grey-900: #111827;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--grey-800);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

ul {
    list-style: none;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

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

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-img {
    height: 40px;
    width: auto;
}

.footer .logo-img {
    height: 36px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--grey-600);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

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

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--grey-100);
    border: 1px solid var(--grey-200);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.lang-toggle:hover {
    background-color: var(--grey-200);
}

.lang-en.active,
.lang-vi.active {
    color: var(--primary);
    font-weight: 600;
}

.lang-divider {
    color: var(--grey-400);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--grey-700);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    padding: 6rem 0 2rem;
    background: linear-gradient(135deg, var(--grey-100) 0%, var(--white) 100%);
    min-height: auto;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--grey-900);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-title span {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--grey-600);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-illustration {
    position: relative;
    width: 400px;
    height: 400px;
}

.illustration-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 50%;
    opacity: 0.2;
}

.illustration-book,
.illustration-chat,
.illustration-star {
    position: absolute;
    animation: float 3s ease-in-out infinite;
}

.illustration-book .material-icons,
.illustration-chat .material-icons,
.illustration-star .material-icons {
    font-size: 4rem;
    color: var(--primary);
}

.illustration-book {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.illustration-chat {
    top: 30%;
    right: 15%;
    animation-delay: 0.5s;
}

.illustration-star {
    bottom: 25%;
    left: 35%;
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ===== Section Styles ===== */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--grey-900);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--grey-600);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Booking Section ===== */
.booking {
    background-color: var(--grey-100);
}

.booking-widget {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    background-color: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.calendar-container {
    padding: 2rem;
    border-right: 1px solid var(--grey-200);
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.calendar-month {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--grey-800);
}

.calendar-nav {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--grey-100);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--grey-600);
    transition: var(--transition);
}

.calendar-nav:hover {
    background-color: var(--primary);
    color: var(--white);
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.calendar-weekdays span {
    text-align: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--grey-500);
    padding: 0.5rem;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    background: none;
}

.calendar-day:hover:not(.disabled):not(.empty) {
    background-color: var(--primary-light);
    color: var(--white);
}

.calendar-day.selected {
    background-color: var(--primary);
    color: var(--white);
    font-weight: 600;
}

.calendar-day.disabled {
    color: var(--grey-300);
    cursor: not-allowed;
}

.calendar-day.empty {
    cursor: default;
}

.calendar-day.available {
    background-color: var(--grey-100);
    color: var(--grey-800);
}

.time-slots-container {
    padding: 2rem;
}

.time-slots-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--grey-800);
    margin-bottom: 0.5rem;
}

.selected-date {
    color: var(--grey-500);
    margin-bottom: 1.5rem;
}

.time-slots {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.time-slot {
    padding: 0.75rem 1rem;
    background-color: var(--grey-100);
    border: 2px solid transparent;
    border-radius: var(--radius);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.time-slot:hover {
    border-color: var(--primary);
}

.time-slot.selected {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.booking-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.booking-form input,
.booking-form textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--grey-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.booking-form textarea {
    resize: vertical;
    min-height: 60px;
}

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

.lesson-type-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.lesson-type-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--grey-600);
    white-space: nowrap;
}

.lesson-type-options {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}

.lesson-type-option {
    flex: 1;
    cursor: pointer;
}

.lesson-type-option input {
    display: none;
}

.lesson-type-btn {
    display: block;
    text-align: center;
    padding: 0.5rem 1rem;
    border: 2px solid var(--grey-300);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--grey-600);
    transition: var(--transition);
}

.lesson-type-option input:checked + .lesson-type-btn {
    border-color: var(--primary);
    background-color: var(--primary);
    color: var(--white);
}

/* ===== Teachers Section ===== */
.teachers {
    background-color: var(--white);
}

.teachers-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.teacher-card {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

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

.teacher-photo {
    position: relative;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    padding: 2rem;
    display: flex;
    justify-content: center;
}

.photo-placeholder {
    width: 150px;
    height: 150px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.photo-placeholder.has-image {
    padding: 0;
}

.photo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.teacher-flag {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    font-size: 2rem;
    background-color: var(--white);
    padding: 0.5rem;
    border-radius: 50%;
    box-shadow: var(--shadow);
}

.teacher-info {
    padding: 1.5rem;
}

.teacher-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--grey-900);
    margin-bottom: 0.25rem;
}

.teacher-nationality {
    color: var(--grey-500);
    margin-bottom: 1rem;
}

.teacher-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background-color: var(--grey-100);
    border-radius: var(--radius);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.detail-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-icon .material-icons {
    font-size: 1.25rem;
    color: var(--primary);
}

.detail-content {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.75rem;
    color: var(--grey-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-value {
    font-weight: 600;
    color: var(--grey-800);
}

.teacher-bio {
    color: var(--grey-600);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ===== Pricing Section ===== */
.pricing {
    background-color: var(--grey-100);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: stretch;
}

.pricing-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.pricing-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.pricing-features {
    flex: 1;
}

.pricing-card .btn {
    margin-top: auto;
}

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

.pricing-card.featured {
    border: 2px solid var(--primary);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.pricing-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 0 0 var(--radius) var(--radius);
}

.pricing-header {
    padding: 2rem 1.5rem 1rem;
    text-align: center;
}

.pricing-card.featured .pricing-header {
    padding-top: 3rem;
}

.pricing-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--grey-900);
    margin-bottom: 0.25rem;
}

.pricing-lessons {
    color: var(--grey-500);
}

.pricing-body {
    padding: 0 1.5rem 2rem;
    text-align: center;
}

.pricing-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: 0.25rem;
}

.currency {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--grey-600);
    margin-right: 0.25rem;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--grey-900);
}

.pricing-per {
    color: var(--grey-500);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.pricing-discount {
    display: inline-block;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.pricing-features {
    text-align: left;
    margin: 1.5rem 0;
}

.pricing-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--grey-600);
    font-size: 0.9375rem;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 600;
}

.pricing-card .btn {
    width: 100%;
}

.pricing-note {
    text-align: center;
    color: var(--grey-600);
    background-color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
}

/* ===== Contact Section ===== */
.contact {
    background-color: var(--grey-100);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--grey-200);
    box-shadow: var(--shadow-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--grey-700);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1rem;
    border: 1px solid var(--grey-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--white);
}

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

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

.contact-form .cf-turnstile,
.booking-form .cf-turnstile {
    display: flex;
    justify-content: center;
}

.contact-form .btn {
    width: 100%;
    margin-top: 0.5rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0;
    background-color: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--grey-200);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    transition: var(--transition);
    border-bottom: 1px solid var(--grey-200);
}

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

.info-card:hover {
    background-color: var(--grey-50);
}

.info-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius);
    flex-shrink: 0;
}

.info-icon .material-icons {
    font-size: 1.25rem;
    color: var(--primary);
}

.info-content h4 {
    font-weight: 600;
    color: var(--grey-800);
    margin-bottom: 0.25rem;
}

.info-content p {
    color: var(--grey-600);
    font-size: 0.95rem;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--grey-900);
    color: var(--grey-300);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--grey-700);
    margin-bottom: 1.5rem;
}

.footer .logo {
    color: var(--white);
}

.footer-tagline {
    margin-top: 0.75rem;
    color: var(--grey-400);
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--grey-400);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    color: var(--grey-500);
    font-size: 0.875rem;
}

.footer-credit {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--grey-600);
}

.footer-credit a {
    color: var(--grey-400);
    text-decoration: underline;
}

.footer-credit a:hover {
    color: var(--white);
}

/* ===== Cookie Banner ===== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--grey-900);
    color: var(--white);
    padding: 1rem;
    z-index: 1001;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

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

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.cookie-content p {
    font-size: 0.875rem;
    color: var(--grey-300);
}

.cookie-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.cookie-actions a {
    color: var(--grey-400);
    font-size: 0.875rem;
}

.cookie-actions a:hover {
    color: var(--white);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1002;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    background-color: var(--white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    margin: 1rem;
    transform: translateY(20px);
    transition: var(--transition);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--grey-100);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    background-color: var(--grey-200);
}

.modal-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--grey-900);
    margin-bottom: 1.5rem;
    padding-right: 2rem;
}

.modal-body h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--grey-800);
    margin: 1.5rem 0 0.5rem;
}

.modal-body h3:first-child {
    margin-top: 0;
}

.modal-body p {
    color: var(--grey-600);
    line-height: 1.7;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--primary);
    color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-lg);
    z-index: 1003;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-icon {
    font-size: 1.25rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-image {
        display: none;
    }

    .booking-widget {
        grid-template-columns: 1fr;
    }

    .calendar-container {
        border-right: none;
        border-bottom: 1px solid var(--grey-200);
    }

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

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

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-5px);
    }

    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow);
        gap: 0;
    }

    .nav-links.show {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.75rem 1rem;
        border-radius: var(--radius);
    }

    .nav-links a:hover {
        background-color: var(--grey-100);
    }

    .nav-links a::after {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 6rem 0 3rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .time-slots {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .cookie-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .calendar-weekdays span,
    .calendar-day {
        font-size: 0.75rem;
    }

    .pricing-amount .price {
        font-size: 2rem;
    }
}

/* Floating Chat Bubbles */
.floating-chat-bubbles {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 1000;
}

.chat-bubble {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
    background-color: var(--white);
}

.chat-bubble img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-messenger img {
    transform: scale(1.25);
}

.chat-bubble:hover {
    transform: scale(1.12);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}