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

:root {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --primary-light: #a78bfa;
    --secondary: #f472b6;
    --accent: #06b6d4;
    --dark: #1e293b;
    --dark-light: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --bg-gradient: linear-gradient(135deg, #faf5ff 0%, #fdf2f8 50%, #f0f9ff 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(139, 92, 246, 0.15);
    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    background: var(--bg-gradient);
    color: var(--dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

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

.section-padding {
    padding: 100px 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header .badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    color: var(--white);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--dark), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Button ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    border-bottom-color: rgba(139, 92, 246, 0.1);
}

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

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 1.8rem;
}

.nav-menu ul {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    font-weight: 500;
    color: var(--dark-light);
    position: relative;
    padding: 4px 0;
    transition: var(--transition);
}

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* ===== Hero ===== */
.hero {
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #faf5ff 0%, #fdf2f8 50%, #f0f9ff 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark);
}

.hero-text .highlight {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 36px;
    max-width: 480px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    transform: perspective(800px) rotateY(-5deg);
    transition: var(--transition);
}

.hero-image img:hover {
    transform: perspective(800px) rotateY(0deg);
}

.hero-wave {
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    line-height: 0;
}

.hero-wave svg {
    width: 100%;
    height: 80px;
}

/* ===== Advantages ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    background: var(--white);
    padding: 36px 28px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(139, 92, 246, 0.06);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(139, 92, 246, 0.15);
}

.icon-circle {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.6rem;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.advantage-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}

.advantage-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* ===== Programs ===== */
.programs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.program-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(139, 92, 246, 0.06);
    position: relative;
}

.program-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.program-card.featured {
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.03);
}

.program-card.featured:hover {
    transform: scale(1.03) translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.badge-hot {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, #f97316, #ef4444);
    color: var(--white);
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
}

.program-header {
    padding: 36px 28px 20px;
    text-align: center;
    background: linear-gradient(135deg, #faf5ff, #fdf2f8);
}

.program-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.price {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.price .currency {
    font-size: 1.6rem;
    font-weight: 600;
}

.program-header p {
    color: var(--gray);
    font-size: 0.95rem;
}

.program-features {
    padding: 24px 28px 32px;
}

.program-features li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--dark-light);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--light);
}

.program-features li:last-child {
    border-bottom: none;
}

.program-features li i {
    color: var(--primary);
    font-size: 0.9rem;
}

.program-card .btn-block {
    margin: 0 28px 32px;
    width: calc(100% - 56px);
}

/* ===== Stats ===== */
.stats {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    animation: float 20s infinite linear;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.stat-item {
    color: var(--white);
}

.stat-number {
    font-size: 3.2rem;
    font-weight: 800;
    display: inline;
}

.stat-plus {
    font-size: 2rem;
    font-weight: 700;
    margin-left: 2px;
}

.stat-item p {
    font-size: 1.1rem;
    opacity: 0.85;
    margin-top: 8px;
}

/* ===== Pages Grid ===== */
.pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.page-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(139, 92, 246, 0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

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

.page-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e9d5ff, #fbc7d4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--primary);
}

.page-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
}

.page-link {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.page-link i {
    font-size: 0.8rem;
    transition: var(--transition);
}

.page-card:hover .page-link i {
    transform: translateX(4px);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-light);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.empty-state code {
    background: var(--light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9rem;
}

/* ===== Contact ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--white);
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.info-item:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.info-item i {
    font-size: 1.4rem;
    color: var(--primary);
    margin-top: 4px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e9d5ff, #fbc7d4);
    border-radius: 10px;
}

.info-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.info-item p {
    color: var(--gray);
    font-size: 0.95rem;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.95rem;
    color: var(--dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--light);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--light);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 12px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
}

.footer-links h4,
.footer-social h4 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.social-icons {
    display: flex;
    gap: 12px;
}

.social-icons a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
    font-size: 1.2rem;
}

.social-icons a:hover {
    background: var(--primary);
    transform: translateY(-4px);
}

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.9rem;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--dark);
    color: var(--white);
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 9999;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-text p {
        margin: 0 auto 36px;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-image {
        display: none;
    }
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .programs-grid {
        grid-template-columns: 1fr 1fr;
    }
    .program-card.featured {
        transform: scale(1);
    }
    .program-card.featured:hover {
        transform: translateY(-8px);
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        box-shadow: var(--shadow-md);
        transform: translateY(-120%);
        transition: var(--transition);
        border-radius: 0 0 var(--radius) var(--radius);
    }
    .nav-menu.active {
        transform: translateY(0);
    }
    .nav-menu ul {
        flex-direction: column;
        gap: 16px;
    }
    .nav-menu a {
        font-size: 1.1rem;
        display: block;
        padding: 8px 0;
    }
    .hero-text h1 {
        font-size: 2.4rem;
    }
    .section-header h2 {
        font-size: 2rem;
    }
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    .programs-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .stat-number {
        font-size: 2.4rem;
    }
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .social-icons {
        justify-content: center;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    .hero-text h1 {
        font-size: 1.8rem;
    }
    .hero {
        padding: 120px 0 60px;
    }
    .section-padding {
        padding: 60px 0;
    }
    .contact-form {
        padding: 24px;
    }
}