/* ═══════════════════════════════════════════════════════════
   HAPPY BLUE LESSONS — Demo Homepage Stylesheet
   Design System: Blue Education · Premium Modern
   ═══════════════════════════════════════════════════════════ */

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

:root {
    /* Brand Colors */
    --blue-50:  #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e3a5f;
    --blue-900: #0f172a;

    /* Accent */
    --accent:    #2563eb;
    --accent-dark: #1d4ed8;
    --accent-light: #60a5fa;
    --accent-glow: rgba(37, 99, 235, 0.15);

    /* Neutrals */
    --white:     #ffffff;
    --gray-50:   #f8fafc;
    --gray-100:  #f1f5f9;
    --gray-200:  #e2e8f0;
    --gray-300:  #cbd5e1;
    --gray-400:  #94a3b8;
    --gray-500:  #64748b;
    --gray-600:  #475569;
    --gray-700:  #334155;
    --gray-800:  #1e293b;
    --gray-900:  #0f172a;

    /* Typography */
    --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;

    /* Spacing */
    --section-padding: clamp(4rem, 8vw, 7rem);

    /* Radius */
    --radius-sm:  8px;
    --radius-md:  12px;
    --radius-lg:  20px;
    --radius-xl:  28px;

    /* Shadows */
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:   0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg:   0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-xl:   0 20px 50px -10px rgba(0,0,0,0.12);
    --shadow-blue: 0 8px 30px rgba(37, 99, 235, 0.18);

    /* Transitions */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --transition: 0.35s var(--ease-out);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 2rem);
}

/* ─── Section Primitives ─── */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
}
.section-label::before {
    content: '';
    width: 28px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.section-title {
    font-family: var(--font-body);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 1rem;
}
.text--accent {
    color: var(--accent);
}

.section-desc {
    font-size: 1.05rem;
    color: var(--gray-500);
    max-width: 700px;
    line-height: 1.8;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}
.section-header .section-desc {
    margin: 0 auto;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.btn--primary {
    background: var(--accent);
    color: var(--white);
    box-shadow: var(--shadow-blue);
}
.btn--primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(37, 99, 235, 0.3);
}
.btn--glass {
    background: rgba(255,255,255,0.15);
    color: var(--white);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.25);
}
.btn--glass:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-2px);
}
.btn--white {
    background: var(--white);
    color: var(--accent);
}
.btn--white:hover {
    background: var(--blue-50);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}
.btn--outline-white {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.4);
}
.btn--outline-white:hover {
    border-color: var(--white);
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}
.btn--lg { padding: 16px 32px; font-size: 1rem; }
.btn--full { width: 100%; justify-content: center; }

/* ═══════════════════════ NAVBAR ═══════════════════════ */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.4s var(--ease-out);
}
.navbar.scrolled {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 20px rgba(0,0,0,0.06);
    padding: 10px 0;
}
.navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}
.navbar__logo {
    display: flex;
    align-items: center;
}
.navbar__logo-img {
    height: 38px;
    width: auto;
    transition: opacity 0.4s var(--ease-out);
}
.navbar__logo-img--dark {
    display: none;
}
.navbar.scrolled .navbar__logo-img--light {
    display: none;
}
.navbar.scrolled .navbar__logo-img--dark {
    display: block;
}
.footer__logo-img {
    height: 40px;
    width: auto;
    opacity: 0.85;
}

.navbar__links {
    display: flex;
    gap: 2rem;
}
.navbar__links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
    transition: color var(--transition);
    position: relative;
}
.navbar__links a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: width var(--transition);
}
.navbar__links a:hover::after,
.navbar__links a.active::after { width: 100%; }
.navbar__links a:hover,
.navbar__links a.active { color: var(--white); }
.navbar.scrolled .navbar__links a { color: var(--gray-600); }
.navbar.scrolled .navbar__links a:hover,
.navbar.scrolled .navbar__links a.active { color: var(--accent); }

.navbar__cta {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.15);
    color: var(--white);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    transition: all var(--transition);
}
.navbar__cta:hover {
    background: var(--accent);
    border-color: var(--accent);
}
.navbar.scrolled .navbar__cta {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}
.navbar.scrolled .navbar__cta:hover {
    background: var(--accent-dark);
}

.navbar__toggle { display: none; }

/* ═══════════════════════ HERO ═══════════════════════ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero__bg-img {
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center 40%;
    filter: brightness(0.55);
}
.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(10, 20, 45, 0.82) 0%,
        rgba(20, 50, 90, 0.68) 35%,
        rgba(37, 99, 235, 0.40) 70%,
        rgba(96, 165, 250, 0.20) 100%
    );
}
/* Floating geometric shapes */
.hero__shapes {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}
.hero__shape {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.08);
    animation: shapeFloat 12s ease-in-out infinite;
}
.hero__shape--1 {
    width: 320px; height: 320px;
    top: -60px; right: -80px;
    background: radial-gradient(circle, rgba(96,165,250,0.08) 0%, transparent 70%);
    animation-duration: 14s;
}
.hero__shape--2 {
    width: 200px; height: 200px;
    bottom: 15%; right: 20%;
    background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%);
    animation-duration: 10s;
    animation-delay: -3s;
}
.hero__shape--3 {
    width: 140px; height: 140px;
    top: 30%; right: 10%;
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: var(--radius-xl);
    transform: rotate(45deg);
    animation-duration: 16s;
    animation-delay: -6s;
}
@keyframes shapeFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-15px) rotate(2deg); }
    50% { transform: translateY(-8px) rotate(-1deg); }
    75% { transform: translateY(-20px) rotate(1deg); }
}

.hero__content {
    position: relative;
    z-index: 2;
    padding: 8rem 0 6rem;
    max-width: 700px;
}
.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.12);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 500;
    color: rgba(255,255,255,0.9);
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s var(--ease-out) both;
}
.badge__dot {
    width: 8px; height: 8px;
    background: #34d399;
    border-radius: 50%;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

.hero__title {
    font-family: var(--font-body);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s 0.1s var(--ease-out) both;
    text-shadow: 0 2px 20px rgba(0,0,0,0.15);
}
.hero__title--accent {
    background: linear-gradient(135deg, #93c5fd, #60a5fa, #bfdbfe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: rgba(255,255,255,0.72);
    line-height: 1.8;
    margin-bottom: 2.5rem;
    max-width: 580px;
    animation: fadeInUp 0.8s 0.2s var(--ease-out) both;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3.5rem;
    animation: fadeInUp 0.8s 0.3s var(--ease-out) both;
}

.hero__stats {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    animation: fadeInUp 0.8s 0.4s var(--ease-out) both;
}
.hero__stat {
    display: flex;
    align-items: center;
    gap: 12px;
}
.stat__number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
}
.stat__icon {
    font-size: 1.8rem;
    color: #34d399;
}
.stat__label {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.3;
    max-width: 100px;
}
.hero__stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.1);
}

.hero__scroll {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.35);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    z-index: 2;
}
.hero__scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.35), transparent);
    animation: scrollLine 2s infinite;
}
@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    50.1% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════ CATEGORIES ═══════════════════════ */
.categories {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}
.categories__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}
.category-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    border: 1px solid var(--gray-100);
}
.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}
.category-card__image {
    position: relative;
    height: 240px;
    overflow: hidden;
}
.category-card__image img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-out);
}
.category-card:hover .category-card__image img {
    transform: scale(1.05);
}
.category-card__badge {
    position: absolute;
    top: 16px; left: 16px;
    background: var(--accent);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}
.category-card__content {
    padding: 2rem;
}
.category-card__icon {
    width: 52px; height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue-50);
    color: var(--accent);
    border-radius: var(--radius-md);
    margin-bottom: 1.2rem;
}
.category-card__title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.6rem;
}
.category-card__desc {
    font-size: 0.95rem;
    color: var(--gray-500);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}
.category-card__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--accent);
    transition: gap var(--transition);
}
.category-card__link:hover { gap: 14px; }

/* ═══════════════════════ ABOUT ═══════════════════════ */
.about {
    padding: var(--section-padding) 0;
}
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.about__image {
    position: relative;
}
.about__image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}
.about__image-accent {
    position: absolute;
    bottom: -20px; right: -20px;
    width: 150px; height: 150px;
    background: var(--accent-glow);
    border-radius: var(--radius-xl);
    z-index: -1;
}
.about__float-card {
    position: absolute;
    bottom: -20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--white);
    padding: 16px 22px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: float 4s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}
.float-card__icon { font-size: 2rem; }
.float-card__text {
    display: flex;
    flex-direction: column;
}
.float-card__text strong {
    font-size: 0.9rem;
    color: var(--gray-900);
}
.float-card__text span {
    font-size: 0.78rem;
    color: var(--gray-400);
}

.about__lead {
    font-size: 1.1rem;
    color: var(--gray-700);
    margin-bottom: 0.8rem;
    font-weight: 500;
}
.about__text {
    color: var(--gray-500);
    margin-bottom: 2rem;
}

.about__features {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-bottom: 2rem;
}
.about__feature {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 16px 20px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.about__feature:hover {
    background: var(--blue-50);
    transform: translateX(4px);
}
.about__feature-icon {
    flex-shrink: 0;
    width: 40px; height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--white);
    border-radius: var(--radius-sm);
}
.about__feature strong {
    display: block;
    font-size: 0.95rem;
    color: var(--gray-900);
    margin-bottom: 2px;
}
.about__feature span {
    font-size: 0.85rem;
    color: var(--gray-400);
}

/* ═══════════════════════ SERVICES ═══════════════════════ */
.services {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}
.services__tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 3rem;
    background: var(--white);
    padding: 6px;
    border-radius: var(--radius-md);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-sm);
}
.services__tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-500);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.services__tab.active {
    background: var(--accent);
    color: var(--white);
    box-shadow: var(--shadow-blue);
}
.services__tab:not(.active):hover {
    color: var(--accent);
    background: var(--blue-50);
}

.services__panel {
    display: none;
}
.services__panel.active {
    display: block;
    animation: fadeInUp 0.5s var(--ease-out);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.services__grid--single {
    grid-template-columns: 1fr;
    max-width: 700px;
    margin: 0 auto;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--blue-100);
}

.service-card__number {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--blue-200);
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}
.service-card__icon {
    width: 48px; height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue-50);
    color: var(--accent);
    border-radius: var(--radius-md);
    margin-bottom: 1.2rem;
}
.service-card__title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.6rem;
    line-height: 1.3;
}
.service-card__desc {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-bottom: 1.2rem;
    line-height: 1.7;
}
.service-card__link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    transition: letter-spacing var(--transition);
}
.service-card__link:hover { letter-spacing: 0.03em; }

.service-card--featured {
    background: linear-gradient(135deg, var(--blue-50), var(--white));
    border-color: var(--blue-200);
}
.service-card__list {
    margin: 1rem 0 1.5rem;
}
.service-card__list li {
    position: relative;
    padding-left: 24px;
    font-size: 0.92rem;
    color: var(--gray-600);
    margin-bottom: 0.6rem;
    line-height: 1.6;
}
.service-card__list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* ═══════════════════════ ADVANTAGES ═══════════════════════ */
.advantages {
    padding: var(--section-padding) 0;
}
.advantages__grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}
.advantage-card {
    text-align: center;
    padding: 2rem 1.2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
    transition: all var(--transition);
    background: var(--white);
}
.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--blue-200);
}
.advantage-card__icon {
    width: 56px; height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue-50);
    color: var(--accent);
    border-radius: var(--radius-md);
    margin: 0 auto 1.2rem;
    transition: all var(--transition);
}
.advantage-card:hover .advantage-card__icon {
    background: var(--accent);
    color: var(--white);
}
.advantage-card__title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}
.advantage-card__desc {
    font-size: 0.82rem;
    color: var(--gray-400);
    line-height: 1.6;
}

/* ═══════════════════════ TUTORING ═══════════════════════ */
.tutoring {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}
.tutoring__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.tutoring__lead {
    font-size: 1.05rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.8;
}
.tutoring__features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}
.tutoring__feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-100);
    transition: all var(--transition);
}
.tutoring__feature:hover {
    border-color: var(--blue-200);
    box-shadow: var(--shadow-md);
}
.tutoring__feature-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}
.tutoring__feature strong {
    display: block;
    font-size: 0.88rem;
    color: var(--gray-900);
    margin-bottom: 2px;
}
.tutoring__feature span {
    font-size: 0.8rem;
    color: var(--gray-400);
}

.tutoring__visual {
    position: relative;
}
.tutoring__visual img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}
.tutoring__visual-card {
    position: absolute;
    bottom: 20px; right: -10px;
    background: var(--white);
    padding: 18px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 5s ease-in-out infinite;
}
.visual-card__icon { font-size: 1.6rem; }
.tutoring__visual-card strong {
    display: block;
    font-size: 0.9rem;
    color: var(--gray-900);
}
.tutoring__visual-card span {
    font-size: 0.78rem;
    color: var(--gray-400);
}

/* ═══════════════════════ CTA ═══════════════════════ */
.cta {
    position: relative;
    padding: var(--section-padding) 0;
    overflow: hidden;
}
.cta__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.cta__bg-img {
    width: 100%; height: 100%;
    object-fit: cover;
}
.cta__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        rgba(15, 23, 42, 0.92) 0%,
        rgba(37, 99, 235, 0.85) 100%
    );
}
.cta__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}
.cta__title {
    font-family: var(--font-body);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}
.cta__desc {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}
.cta__actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ═══════════════════════ CONTACT ═══════════════════════ */
.contact {
    padding: var(--section-padding) 0;
}
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: flex-start;
}
.contact__desc {
    color: var(--gray-500);
    margin-bottom: 2rem;
    line-height: 1.8;
}
.contact__details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.contact__detail {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 16px 20px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.contact__detail:hover {
    background: var(--blue-50);
}
.contact__detail-icon {
    flex-shrink: 0;
    width: 44px; height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--white);
    border-radius: var(--radius-sm);
}
.contact__detail strong {
    display: block;
    font-size: 0.85rem;
    color: var(--gray-900);
    margin-bottom: 2px;
}
.contact__detail span,
.contact__detail a {
    font-size: 0.92rem;
    color: var(--gray-500);
    transition: color var(--transition);
}
.contact__detail a:hover { color: var(--accent); }

.contact__form-wrap {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
}
.contact__form-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.form__group {
    margin-bottom: 1.2rem;
}
.form__group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--gray-700);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    outline: none;
}
.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: var(--white);
}
.form__group textarea { resize: vertical; min-height: 100px; }
.form__group select { cursor: pointer; appearance: auto; }

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form__checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 1.5rem;
}
.form__checkbox input[type="checkbox"] {
    margin-top: 4px;
    accent-color: var(--accent);
    width: 16px; height: 16px;
}
.form__checkbox label {
    font-size: 0.85rem;
    color: var(--gray-500);
    cursor: pointer;
}
.form__checkbox a {
    color: var(--accent);
    text-decoration: underline;
}

/* ═══════════════════════ FOOTER ═══════════════════════ */
.footer {
    background: var(--gray-900);
    color: rgba(255,255,255,0.6);
    padding: 4rem 0 1.5rem;
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__slogan {
    font-style: italic;
    color: rgba(255,255,255,0.4);
    margin-top: 1rem;
    font-size: 0.9rem;
}
.footer__col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.footer__col ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.footer__col a {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.5);
    transition: color var(--transition);
}
.footer__col a:hover { color: var(--accent-light); }

.footer__contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 0.8rem;
    font-size: 0.88rem;
    line-height: 1.5;
}
.footer__contact svg {
    flex-shrink: 0;
    margin-top: 3px;
    color: var(--accent-light);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.3);
}
.footer__credit strong {
    color: var(--accent-light);
}

/* ═══════════════════════ ANIMATIONS ═══════════════════════ */
[data-animate] {
    opacity: 0;
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
    transition-delay: var(--delay, 0s);
}
[data-animate="up"] { transform: translateY(40px); }
[data-animate="left"] { transform: translateX(-40px); }
[data-animate="right"] { transform: translateX(40px); }
[data-animate].visible {
    opacity: 1;
    transform: translate(0);
}

/* ═══════════════════════ RESPONSIVE ═══════════════════════ */
@media (max-width: 1024px) {
    .advantages__grid { grid-template-columns: repeat(3, 1fr); }
    .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .navbar__links,
    .navbar__cta { display: none; }
    .navbar__toggle {
        display: flex;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
    }
    .navbar__toggle span {
        display: block;
        width: 24px; height: 2px;
        background: var(--white);
        border-radius: 2px;
        transition: all 0.3s;
    }
    .navbar.scrolled .navbar__toggle span {
        background: var(--gray-900);
    }

    .navbar__links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: var(--white);
        padding: 1.5rem 2rem;
        box-shadow: var(--shadow-xl);
        gap: 1rem;
    }
    .navbar__links.open a { color: var(--gray-700) !important; }

    .hero__content { padding: 7rem 0 4rem; }
    .hero__stats { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .hero__stat-divider { width: 40px; height: 1px; }
    .hero__scroll { display: none; }

    .categories__grid { grid-template-columns: 1fr; }
    .about__grid { grid-template-columns: 1fr; gap: 2rem; }
    .tutoring__grid { grid-template-columns: 1fr; gap: 2rem; }
    .services__grid { grid-template-columns: 1fr; }
    .advantages__grid { grid-template-columns: repeat(2, 1fr); }
    .contact__grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer__grid { grid-template-columns: 1fr; }
    .footer__bottom { flex-direction: column; gap: 0.5rem; text-align: center; }

    .tutoring__features { grid-template-columns: 1fr; }
    .form__row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .advantages__grid { grid-template-columns: 1fr; }
    .hero__actions { flex-direction: column; }
}