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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    overflow-x: hidden;
    max-width: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--white);
    color: var(--text-primary);
    overflow-x: hidden;
    max-width: 100%;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, video {
    max-width: 100%;
    display: block;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===================================
   Navbar
=================================== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(255,255,255,0.94);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: box-shadow var(--transition-base);
}
.navbar.scrolled { box-shadow: var(--shadow-sm); }

.nav-container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 34px; width: auto; object-fit: contain; }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    white-space: nowrap;
}
.nav-link:hover { color: var(--purple); }

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-shrink: 0;
}

.nav-cta-mobile { display: none; flex-direction: column; gap: 0.75rem; width: 100%; }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}
.hamburger span {
    width: 22px; height: 2px;
    background-color: var(--gray-700);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
    display: block;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }

/* ===================================
   Buttons
=================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.4rem;
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base), color var(--transition-base);
    white-space: nowrap;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-primary {
    background: var(--purple);
    color: var(--white);
    box-shadow: 0 2px 12px rgba(140,60,220,0.22);
}
.btn-primary:hover:not(:disabled) {
    background: var(--purple-dark);
    box-shadow: var(--shadow-purple);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1.5px solid var(--border);
}
.btn-ghost:hover:not(:disabled) {
    border-color: var(--purple);
    color: var(--purple);
}

.btn-outline {
    background: transparent;
    color: var(--purple);
    border: 1.5px solid var(--purple);
}
.btn-outline:hover:not(:disabled) {
    background: var(--purple);
    color: var(--white);
}

.btn-white {
    background: var(--white);
    color: var(--purple);
    font-weight: 700;
}
.btn-white:hover:not(:disabled) {
    background: var(--purple-tint);
    transform: translateY(-1px);
}

.btn-outline-white {
    background: transparent;
    color: var(--white);
    border: 1.5px solid rgba(255,255,255,0.5);
    font-weight: 600;
}
.btn-outline-white:hover:not(:disabled) {
    background: rgba(255,255,255,0.1);
    border-color: white;
}

.btn-sm { padding: 0.5rem 1.1rem; font-size: 0.85rem; }
.btn-lg { padding: 0.85rem 2rem; font-size: 1rem; }
.btn-full { width: 100%; }

/* ===================================
   Hero
=================================== */
.hero {
    padding: 100px 0 72px;
    background: var(--white);
    overflow: hidden;
}

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

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--purple-tint);
    color: var(--purple);
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 1.25rem;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}
.hero-title .accent { color: var(--purple); }

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 2rem;
    max-width: 440px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.hero-trust {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.hero-trust-avatars { display: flex; }
.hero-trust-avatars span {
    width: 30px; height: 30px;
    border-radius: 50%;
    border: 2px solid var(--white);
    background: linear-gradient(135deg, var(--purple-light), var(--purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: white;
    margin-left: -8px;
    flex-shrink: 0;
}
.hero-trust-avatars span:first-child { margin-left: 0; }
.hero-trust-text { font-size: 0.82rem; color: var(--text-secondary); }
.hero-trust-text strong { color: var(--text-primary); }

/* Hero video/media */
.hero-media-wrap {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    box-shadow: var(--shadow-lg);
    background: var(--gray-100);
    /* Prevent iOS from showing controls overlay */
    -webkit-mask-image: -webkit-radial-gradient(white, black);
}

.hero-media-wrap video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* Disable PiP and remote playback */
    pointer-events: none;
}

/* iOS Safari: hide native video controls completely */
.hero-media-wrap video::-webkit-media-controls { display: none !important; }
.hero-media-wrap video::-webkit-media-controls-enclosure { display: none !important; }
.hero-media-wrap video::-webkit-media-controls-panel { display: none !important; }
.hero-media-wrap video::-webkit-media-controls-play-button { display: none !important; }
.hero-media-wrap video::-webkit-media-controls-start-playback-button { display: none !important; }

.hero-badge-float {
    position: absolute;
    bottom: 1.25rem;
    left: 1.25rem;
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 0.65rem;
    pointer-events: none;
}
.hero-badge-float .badge-icon {
    width: 36px; height: 36px;
    background: var(--purple-tint);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.hero-badge-float .badge-text strong {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}
.hero-badge-float .badge-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===================================
   Stats Bar
=================================== */
.stats-bar {
    padding: 2.5rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--white);
}
.stats-inner {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
}
.stat-item {
    text-align: center;
    flex: 1;
    padding: 0 1rem;
    border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-number {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--purple);
    line-height: 1;
    margin-bottom: 0.3rem;
}
.stat-label { font-size: 0.82rem; color: var(--text-secondary); }

/* ===================================
   Section Shared
=================================== */
.section-label {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--purple);
    margin-bottom: 0.6rem;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 0.65rem;
    line-height: 1.2;
}
.section-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 480px;
    line-height: 1.7;
}
.section-header { margin-bottom: 3rem; }

/* ===================================
   How It Works
=================================== */
.how-it-works {
    padding: 5rem 0;
    background: var(--white);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.step-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    border: 1px solid var(--border);
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}
.step-card:hover {
    border-color: var(--purple-light);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.step-num {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--purple);
    background: var(--purple-tint);
    width: 26px; height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.1rem;
}

.step-icon-wrap {
    width: 52px; height: 52px;
    background: var(--purple-tint);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--purple);
    margin-bottom: 1rem;
}

.step-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.45rem;
}
.step-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ===================================
   Tutors
=================================== */
.tutors {
    padding: 5rem 0;
    background: var(--gray-50);
}

.tutors-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.tutor-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.tutor-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.tutor-card-img-wrap {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--gray-100);
    flex-shrink: 0;
}

.tutor-card-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.tutor-card-body { padding: 1.1rem 1.25rem 1.25rem; }
.tutor-name {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}
.tutor-specialty {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 0.65rem;
}
.tutor-meta { display: flex; align-items: center; }
.tutor-rating {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
}
.rating-count { font-weight: 400; color: var(--text-muted); }

/* ===================================
   Pricing Section
=================================== */
.pricing-section {
    padding: 5rem 0;
    background: var(--white);
}

/* ===================================
   CTA Banner
=================================== */
.cta-banner {
    padding: 5rem 0;
    background: var(--white);
}
.cta-inner {
    background: var(--purple);
    border-radius: var(--radius-xl);
    padding: 4rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-inner::before {
    content: '';
    position: absolute;
    top: -80px; right: -80px;
    width: 280px; height: 280px;
    background: rgba(255,255,255,0.06);
    border-radius: 50%;
    pointer-events: none;
}
.cta-inner::after {
    content: '';
    position: absolute;
    bottom: -60px; left: -60px;
    width: 200px; height: 200px;
    background: rgba(255,255,255,0.04);
    border-radius: 50%;
    pointer-events: none;
}
.cta-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 0.65rem;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}
.cta-subtitle {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}
.cta-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* ===================================
   Footer
=================================== */
.footer {
    background: var(--gray-900);
    color: rgba(255,255,255,0.6);
    padding: 3.5rem 0 0;
}
.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2.5rem;
    padding-bottom: 3rem;
}
.footer-logo-img {
    height: 30px;
    width: auto;
    object-fit: contain;
    margin-bottom: 0.85rem;
}
.footer-desc {
    font-size: 0.85rem;
    line-height: 1.7;
    max-width: 220px;
}
.footer-heading {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.85rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-links a {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    transition: color var(--transition-fast);
}
.footer-links a:hover { color: var(--white); }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 1.25rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.3);
}
.footer-bottom a {
    color: rgba(255,255,255,0.5);
    transition: color var(--transition-fast);
}
.footer-bottom a:hover { color: var(--white); }
.footer-dev { font-size: 0.8rem; color: rgba(255,255,255,0.35); }
.footer-dev a { color: rgba(255,255,255,0.55); font-weight: 600; }
.footer-dev a:hover { color: var(--white); }

/* ===================================
   Responsive — Tablet (≤1024px)
=================================== */
@media (max-width: 1024px) {
    .hero-inner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .hero-media-wrap {
        max-width: 600px;
        width: 100%;
    }
    .hero-subtitle { max-width: 100%; }
    .steps-grid { grid-template-columns: repeat(3, 1fr); }
    .tutors-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

/* ===================================
   Responsive — Mobile (≤768px)
=================================== */
@media (max-width: 768px) {
    /* Nav */
    .nav-menu {
        position: fixed;
        top: 64px; left: 0; right: 0;
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: 1.25rem 1.5rem 1.5rem;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
        gap: 1rem;
        z-index: 999;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
    .nav-buttons { display: none; }
    .nav-cta-mobile { display: flex; }
    .hamburger { display: flex; }

    /* Hero */
    .hero { padding: 88px 0 56px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { text-align: center; justify-content: center; }

    /* Stats */
    .stats-inner { flex-wrap: wrap; }
    .stat-item {
        flex: 1 1 calc(50% - 1rem);
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 1rem;
    }
    .stat-item:nth-child(odd) { border-right: 1px solid var(--border); }
    .stat-item:nth-last-child(-n+2) { border-bottom: none; }

    /* Steps */
    .steps-grid { grid-template-columns: 1fr; gap: 1rem; }

    /* Tutors */
    .tutors-grid { grid-template-columns: 1fr; }

    /* CTA */
    .cta-inner { padding: 2.5rem 1.5rem; }
    .cta-actions { flex-direction: column; align-items: stretch; }
    .cta-actions .btn { text-align: center; justify-content: center; }

    /* Footer */
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; text-align: center; gap: 0.35rem; }
}

/* ===================================
   Responsive — Small Mobile (≤480px)
=================================== */
@media (max-width: 480px) {
    .container { padding: 0 1rem; }
    .nav-container { padding: 0 1rem; }
    .hero { padding: 80px 0 48px; }
    .hero-media-wrap { border-radius: var(--radius-lg); }
    .stats-inner { flex-direction: column; }
    .stat-item {
        flex: 1 1 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .stat-item:last-child { border-bottom: none; }
    .footer-inner { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
    .cta-inner { border-radius: var(--radius-lg); }
}

/* ===================================
   iOS Safe Area Support
=================================== */
@supports (padding: max(0px)) {
    .navbar { padding-left: max(0px, env(safe-area-inset-left)); padding-right: max(0px, env(safe-area-inset-right)); }
    .footer { padding-bottom: max(0px, env(safe-area-inset-bottom)); }
}

/* ===================================
   Categories Section
=================================== */
.categories {
    padding: 5rem 0;
    background: var(--white);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.category-card {
    background: var(--gray-50);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
    cursor: default;
}
.category-card:hover {
    border-color: var(--purple-light);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.category-icon {
    width: 48px; height: 48px;
    background: var(--purple-tint);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: var(--purple);
    margin-bottom: 1rem;
}

.category-name {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.category-examples {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
}

@media (max-width: 1024px) {
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .categories-grid { grid-template-columns: 1fr; }
}