/* ====================================================
   LingoSheets – Modern Design System v3
   Brand: LingoSheets | Primary: #FF5C00
   Fonts: Plus Jakarta Sans + Inter
   Dark Mode + Light Mode
   ==================================================== */

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

:root {
    --primary: #FF5C00;
    --primary-hover: #E05200;
    --primary-light: rgba(255, 92, 0, 0.08);
    --primary-glow: rgba(255, 92, 0, 0.25);
    --primary-soft: rgba(255, 92, 0, 0.04);
    --green: #10B981;
    --green-soft: rgba(16, 185, 129, 0.08);
    --star: #F59E0B;
    --star-soft: rgba(245, 158, 11, 0.1);
    --purple: #8B5CF6;
    --red: #EF4444;
    --red-soft: rgba(239, 68, 68, 0.08);

    /* Light mode */
    --bg: #FCFCFD;
    --bg-alt: #F6F7FA;
    --bg-section: #F0F1F5;
    --surface: #FFFFFF;
    --surface-raised: #FFFFFF;
    --surface-hover: #FAFBFC;
    --text-primary: #0F1117;
    --text-secondary: #4B5565;
    --text-muted: #8B92A0;
    --text-placeholder: #B0B7C3;
    --border: rgba(0, 0, 0, 0.06);
    --border-strong: rgba(0, 0, 0, 0.1);
    --border-hover: rgba(255, 92, 0, 0.25);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.07);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.09);
    --shadow-2xl: 0 32px 80px rgba(0, 0, 0, 0.12);
    --nav-bg: rgba(252, 252, 253, 0.78);
    --hero-glow: rgba(255, 92, 0, 0.08);
    --card-hover-border: rgba(255, 92, 0, 0.2);
    --overlay: rgba(0, 0, 0, 0.50);

    --radius-sm: 0.5rem;
    --radius-md: 0.875rem;
    --radius-lg: 1.25rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;
    --font-display: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition-fast: 180ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-base: 350ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 550ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Dark Mode --- */
html.dark {
    --bg: #060609;
    --bg-alt: #0C0D13;
    --bg-section: #0A0B10;
    --surface: #12131C;
    --surface-raised: #181A26;
    --surface-hover: #1A1C2A;
    --text-primary: #F1F1F7;
    --text-secondary: #9B9DB5;
    --text-muted: #5E6078;
    --text-placeholder: #4A4C5E;
    --border: rgba(255, 255, 255, 0.05);
    --border-strong: rgba(255, 255, 255, 0.09);
    --border-hover: rgba(255, 92, 0, 0.35);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 32px 80px rgba(0, 0, 0, 0.6);
    --nav-bg: rgba(6, 6, 9, 0.78);
    --hero-glow: rgba(255, 92, 0, 0.12);
    --card-hover-border: rgba(255, 92, 0, 0.3);
    --overlay: rgba(0, 0, 0, 0.75);
    --primary-light: rgba(255, 92, 0, 0.12);
    --primary-soft: rgba(255, 92, 0, 0.05);
    --green-soft: rgba(16, 185, 129, 0.1);
    --star-soft: rgba(245, 158, 11, 0.12);
    --red-soft: rgba(239, 68, 68, 0.1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

::selection {
    background: var(--primary);
    color: #FFFFFF;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* --- Container --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ====== NAVIGATION ====== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border);
    transition: box-shadow var(--transition-base), background var(--transition-base), border-color var(--transition-base);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--border-strong);
}

.nav-inner {
    max-width: 1200px;
    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;
    gap: 0.55rem;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    cursor: pointer;
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.nav-logo:hover { transform: scale(1.03); }

.nav-logo-icon {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, #FF5C00, #FF7B2F);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 1.1rem;
    box-shadow: 0 2px 10px var(--primary-glow);
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.nav-icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.15rem;
}

.nav-icon-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-1px);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.3rem;
    background: linear-gradient(135deg, #FF5C00, #FF7B2F);
    color: #FFFFFF;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.84rem;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 14px var(--primary-glow);
    white-space: nowrap;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 92, 0, 0.35);
}

.nav-cta:active { transform: scale(0.97); }

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-primary);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.3rem;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    background: var(--bg);
    padding: 1.5rem;
    padding-bottom: 2rem;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

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

.mobile-menu .btn-primary,
.mobile-menu .btn-secondary {
    flex-shrink: 0;
}

/* ====== HERO ====== */
.hero {
    position: relative;
    padding: 10rem 0 6rem;
    overflow: hidden;
    background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 40%, var(--bg) 100%);
    transition: background var(--transition-base);
}

.hero::before {
    content: '';
    position: absolute;
    top: -300px;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 600px;
    background: radial-gradient(ellipse at center, var(--hero-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    animation: heroGlowPulse 8s ease-in-out infinite;
}

@keyframes heroGlowPulse {
    0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1); }
    50% { opacity: 1; transform: translateX(-50%) scale(1.08); }
}

.hero-glow {
    display: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text { max-width: 560px; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1.1rem;
    background: var(--primary-soft);
    border: 1px solid rgba(255, 92, 0, 0.15);
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-family: var(--font-display);
    letter-spacing: 0.01em;
}

.hero-badge i {
    animation: softPulse 2.5s ease-in-out infinite;
    font-size: 0.9rem;
}

@keyframes softPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.6rem, 5vw, 3.9rem);
    line-height: 1.06;
    margin-bottom: 1.25rem;
    letter-spacing: -0.04em;
    font-weight: 800;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #FF5C00 0%, #FF8A3D 50%, #FF5C00 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 480px;
}

.hero-subtitle strong {
    color: var(--text-primary);
    font-weight: 600;
}

.hero-image {
    position: relative;
    animation: float 7s ease-in-out infinite;
}

.hero-image img {
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    transition: box-shadow var(--transition-base);
}

.hero-image::after {
    content: '';
    position: absolute;
    inset: -30px;
    background: radial-gradient(ellipse at center, var(--hero-glow) 0%, transparent 70%);
    z-index: -1;
    border-radius: var(--radius-2xl);
}

/* ====== BUTTONS ====== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, #FF5C00 0%, #FF7B2F 100%);
    color: #FFFFFF;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 24px rgba(255, 92, 0, 0.25);
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.btn-primary:hover::after { transform: translateX(100%); }
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 35px rgba(255, 92, 0, 0.35);
}
.btn-primary:active { transform: scale(0.97); }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--surface);
    color: var(--text-primary);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--border-strong);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.hero-trust-line {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.hero-trust-line i { color: var(--green); font-size: 1rem; }

/* ====== SECTIONS ====== */
.section {
    padding: 7rem 0;
    transition: background var(--transition-base);
}

.section-alt { background: var(--bg-alt); }

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 4rem;
}

.section-header .tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary);
    margin-bottom: 0.75rem;
    font-family: var(--font-display);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.85rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    line-height: 1.15;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====== PRODUCT CARDS ====== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.product-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2.75rem 2rem;
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), #FF8A3D);
    opacity: 0;
    transition: opacity var(--transition-base);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.product-card:hover {
    border-color: var(--card-hover-border);
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    background: var(--surface-hover);
}

.product-card:hover::before { opacity: 1; }

.product-card-icon {
    width: 68px;
    height: 68px;
    border-radius: var(--radius-lg);
    background: var(--primary-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.7rem;
    color: var(--primary);
    transition: all var(--transition-base);
}

.product-card:hover .product-card-icon {
    background: linear-gradient(135deg, #FF5C00, #FF7B2F);
    color: #FFFFFF;
    transform: scale(1.1);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.product-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
    letter-spacing: -0.02em;
}

.product-card p {
    font-size: 0.93rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ====== TEACHER SECTION ====== */
.teacher-section {
    display: flex;
    align-items: center;
    gap: 5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.teacher-photo {
    flex-shrink: 0;
    width: 280px;
    height: 280px;
    border-radius: var(--radius-2xl);
    object-fit: cover;
    border: 3px solid var(--surface);
    box-shadow: var(--shadow-xl);
    transform: rotate(-2deg);
    transition: all var(--transition-base);
}

.teacher-photo:hover {
    transform: rotate(0) scale(1.03);
    box-shadow: 0 24px 80px rgba(255, 92, 0, 0.12);
    border-color: var(--primary-light);
}

.teacher-content { flex: 1; }

.teacher-name {
    font-size: 2.4rem;
    font-family: var(--font-display);
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.teacher-creds {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1.5rem;
    background: var(--primary-soft);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 92, 0, 0.15);
}

.teacher-creds i { font-size: 1.1rem; }

.teacher-quote {
    font-size: 1.2rem;
    line-height: 1.75;
    color: var(--text-secondary);
    position: relative;
    padding-left: 0;
}

.teacher-quote::before {
    content: '"';
    position: absolute;
    top: -30px;
    left: -15px;
    font-size: 5rem;
    color: rgba(255, 92, 0, 0.08);
    font-family: var(--font-display);
    font-weight: 800;
    z-index: -1;
    line-height: 1;
}

/* ====== HOW IT WORKS STEPS ====== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.step-card {
    text-align: center;
    padding: 2.5rem 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.step-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
}

.step-number {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF5C00, #FF7B2F);
    color: white;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    box-shadow: 0 4px 16px rgba(255, 92, 0, 0.25);
}

.step-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
}

.step-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

@media (max-width: 768px) {
    .steps-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

/* ====== LANGUAGE SELECTION GRID ====== */
.lang-select-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.lang-select-card {
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem 1rem;
    text-align: center;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
    cursor: pointer;
}

.lang-select-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    background: var(--surface-hover);
}

.lang-select-flag {
    font-size: 2.5rem;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.lang-select-flag-img {
    width: 48px;
    height: 32px;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 0.5rem;
    object-fit: cover;
}

.lang-select-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.lang-select-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

@media (max-width: 768px) {
    .lang-select-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .lang-select-grid {
        grid-template-columns: 1fr;
        max-width: 280px;
    }
}

/* ====== PREVIEW ====== */
.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1100px;
    margin: 0 auto;
    align-items: start;
}

.preview-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.preview-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    border-color: var(--card-hover-border);
}

.preview-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
    text-align: center;
}

.preview-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.preview-header p {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 700;
}

.preview-image {
    width: 100%;
    height: auto;
    display: block;
}

/* ====== SPEAKERS (used on main landing page only) ====== */
.speakers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.speaker-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.speaker-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    border-color: var(--card-hover-border);
}

.speaker-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    border: 3px solid var(--bg-alt);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.speaker-card:hover .speaker-avatar {
    border-color: var(--primary);
    box-shadow: 0 0 0 5px var(--primary-light);
}

.speaker-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.speaker-flag {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    display: block;
}

.speaker-quote {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.55;
}

/* ====== REVIEWS ====== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
    align-items: start;
}

.review-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
}

.review-card::before {
    content: '';
    position: absolute;
    top: 0; left: 2rem; right: 2rem;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--star), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.review-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
    background: var(--surface-hover);
}

.review-card:hover::before { opacity: 0.6; }

.review-stars {
    display: flex;
    gap: 0.15rem;
    margin-bottom: 1rem;
    color: var(--star);
    font-size: 1.05rem;
}

.review-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.review-avatar-initial {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-soft), rgba(255, 92, 0, 0.12));
    color: var(--primary);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 2px solid var(--border);
}

.review-author-info {
    display: flex;
    flex-direction: column;
}

.review-author-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.88rem;
    color: var(--text-primary);
}

.review-author-role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ====== PRICING ====== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.75rem;
    align-items: start;
}

.pricing-card {
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.pricing-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    border-color: var(--border-strong);
}

.pricing-card.featured {
    border-color: rgba(255, 92, 0, 0.25);
    box-shadow: 0 4px 30px rgba(255, 92, 0, 0.06);
    background: linear-gradient(180deg, rgba(255, 92, 0, 0.03) 0%, var(--surface) 100%);
}

.pricing-card.featured:hover {
    box-shadow: 0 12px 50px rgba(255, 92, 0, 0.12);
    border-color: rgba(255, 92, 0, 0.4);
}

.pricing-card.combo-card:hover {
    border-color: rgba(16, 185, 129, 0.5) !important;
    box-shadow: 0 12px 50px rgba(16, 185, 129, 0.15) !important;
}

.pricing-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1.25rem;
}

.pricing-badge.free {
    background: var(--green-soft);
    color: var(--green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.pricing-badge.popular {
    background: linear-gradient(135deg, #FF5C00, #FF7B2F);
    color: #FFFFFF;
    box-shadow: 0 2px 12px rgba(255, 92, 0, 0.25);
}

.pricing-badge.advanced {
    background: rgba(139, 92, 246, 0.1);
    color: var(--purple);
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.pricing-plan-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
    letter-spacing: -0.02em;
}

.pricing-plan-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.15rem;
    margin-bottom: 0.25rem;
}

.pricing-currency {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-display);
}

.pricing-amount {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--text-primary);
    font-family: var(--font-display);
    line-height: 1;
}

.pricing-original-price {
    text-decoration: line-through;
    color: var(--text-muted);
    font-size: 1.25rem;
    margin-right: 0.5rem;
    opacity: 0.7;
}

.pricing-amount.discounted {
    color: var(--red);
}

.pricing-free-label {
    font-size: 3rem;
    font-weight: 800;
    color: var(--green);
    font-family: var(--font-display);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.pricing-period {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 1.75rem;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    padding: 0.55rem 0;
    font-size: 0.88rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

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

.pricing-features li i {
    color: var(--green);
    font-size: 1.15rem;
    flex-shrink: 0;
    margin-top: 0.05rem;
}

.pricing-features li strong { color: var(--text-primary); }

.pricing-btn {
    width: 100%;
    padding: 1rem 1.5rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.pricing-btn.primary-btn {
    background: linear-gradient(135deg, #FF5C00, #FF7B2F);
    color: #FFFFFF;
    box-shadow: 0 4px 24px rgba(255, 92, 0, 0.25);
}

.pricing-btn.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 35px rgba(255, 92, 0, 0.35);
}

.pricing-btn.secondary-btn {
    background: var(--bg-alt);
    color: var(--text-primary);
    border: 1.5px solid var(--border-strong);
}

.pricing-btn.secondary-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-soft);
    transform: translateY(-2px);
}

.pricing-btn:active { transform: scale(0.97) !important; }

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 3rem;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
}

.trust-badge i { color: var(--green); font-size: 1.05rem; }

/* ====== LOGIN MODAL ====== */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--overlay);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-overlay.active .modal-box {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.modal-box {
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    width: 100%;
    max-width: 420px;
    margin: 1rem;
    transform: translateY(20px) scale(0.96);
    opacity: 0;
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 1.5rem 0;
}

.modal-header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modal-header h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
}

.modal-close {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--bg-alt);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.1rem;
}

.modal-close:hover {
    background: var(--red-soft);
    color: var(--red);
}

.modal-divider {
    height: 1px;
    background: var(--border);
    margin: 1rem 1.5rem;
}

.modal-body {
    padding: 0 1.5rem 1.5rem;
}

.form-group { margin-bottom: 1rem; }

.form-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    font-family: var(--font-display);
}

.form-input {
    width: 100%;
    padding: 0.8rem 1rem;
    background: var(--bg-alt);
    border: 1.5px solid var(--border-strong);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    caret-color: var(--primary);
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
    background: var(--surface);
}

.form-input::placeholder { color: var(--text-placeholder); }

.form-btn {
    width: 100%;
    padding: 0.9rem 1.5rem;
    background: linear-gradient(135deg, #FF5C00, #FF7B2F);
    color: #FFFFFF;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 14px var(--primary-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.form-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 92, 0, 0.3);
}

.form-btn:active { transform: scale(0.98); }
.form-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.form-link {
    display: block;
    text-align: center;
    font-size: 0.84rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    cursor: pointer;
    transition: color var(--transition-fast);
    background: none;
    border: none;
    width: 100%;
    font-family: var(--font-body);
}

.form-link:hover { color: var(--primary); }

.form-error {
    background: var(--red-soft);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--red);
    border-radius: var(--radius-md);
    padding: 0.65rem 0.85rem;
    font-size: 0.84rem;
    display: none;
    margin-bottom: 0.75rem;
}

.form-error.show { display: block; }

.form-success {
    background: var(--green-soft);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #059669;
    border-radius: var(--radius-md);
    padding: 0.65rem 0.85rem;
    font-size: 0.84rem;
    display: none;
    margin-bottom: 0.75rem;
}

.form-success.show { display: block; }

.modal-footer {
    padding: 0 1.5rem 1.25rem;
    text-align: center;
}

.modal-footer-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ====== FOOTER ====== */
.footer {
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    padding: 3rem 0;
    transition: background var(--transition-base);
    position: relative;
    z-index: 50;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    font-weight: 500;
}

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

.footer-copy {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* ====== ANIMATIONS ====== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.anim-hidden {
    opacity: 0;
    transform: translateY(35px);
    transition: all 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.anim-visible {
    opacity: 1;
    transform: translateY(0);
}

.anim-delay-1 { transition-delay: 80ms; }
.anim-delay-2 { transition-delay: 160ms; }
.anim-delay-3 { transition-delay: 240ms; }
.anim-delay-4 { transition-delay: 320ms; }

/* ====== RESPONSIVE ====== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3.5rem;
    }

    .hero-text {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-subtitle { max-width: 520px; }
    .cta-group { justify-content: center; }
    .hero-trust-line { justify-content: center; }

    .hero-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .product-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }

    .speakers-grid { grid-template-columns: repeat(2, 1fr); }

    .reviews-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 800px;
        margin: 0 auto;
    }

    .teacher-section {
        flex-direction: column;
        text-align: center;
        gap: 2.5rem;
    }

    .teacher-photo {
        transform: rotate(0);
        margin: 0 auto;
    }

    .teacher-quote::before {
        left: 50%;
        transform: translateX(-50%);
    }

    .teacher-creds { justify-content: center; }

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

@media (max-width: 640px) {
    .hero { padding: 8rem 0 4rem; }
    .hero-title { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1.05rem; }
    .section { padding: 4.5rem 0; }
    .section-header h2 { font-size: 1.8rem; }

    .speakers-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
        margin: 0 auto;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 440px;
        margin: 0 auto;
    }

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

    .cta-group {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary, .btn-secondary { width: 100%; }

    .teacher-photo {
        width: 220px;
        height: 220px;
    }

    .teacher-name { font-size: 1.8rem; }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .footer-links { justify-content: center; }

    .nav-cta span { display: none; }
}

/* ====== SCROLL CAROUSEL ====== */
.scroll-carousel {
    position: relative;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.3rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: all 0.2s ease;
}

.carousel-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 6px 20px rgba(255,92,0,0.2);
}

.carousel-btn-left { left: -24px; }
.carousel-btn-right { right: -24px; }

.speakers-grid::-webkit-scrollbar { display: none; }
.pricing-grid::-webkit-scrollbar { display: none; }

@media (max-width: 768px) {
    .carousel-btn-left { left: 4px; }
    .carousel-btn-right { right: 4px; }
    .carousel-btn { width: 36px; height: 36px; font-size: 1rem; }
}

/* ====== CART DRAWER (RIGHT SIDEBAR) ====== */
.cart-drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 300;
    pointer-events: none;
}

.cart-drawer-overlay.active {
    pointer-events: none;
}

.cart-drawer {
    position: fixed;
    top: 0;
    right: -420px;
    width: 400px;
    max-width: 90vw;
    height: 100vh;
    background: var(--surface);
    border-left: 1px solid var(--border-strong);
    box-shadow: -8px 0 30px rgba(0,0,0,0.12);
    display: flex;
    flex-direction: column;
    transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    overflow-y: auto;
    z-index: 301;
    pointer-events: auto;
}

.cart-drawer-overlay.active .cart-drawer {
    right: 0;
}

.cart-drawer .modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.cart-drawer .modal-body {
    flex: 1;
    padding: 1rem 1.5rem;
    overflow-y: auto;
}

@media (max-width: 480px) {
    .cart-drawer {
        width: 100vw;
        right: -100vw;
    }
}