:root {
    --hi-primary: #0f172a;
    --hi-accent: #c41e3a;
    --hi-accent-hover: #991b1b;
    --hi-accent-soft: #fef2f2;
    --hi-accent-muted: #fee2e2;
    --hi-bg: #f8fafc;
    --hi-surface: #ffffff;
    --hi-text: #1e293b;
    --hi-text-light: #64748b;
    --hi-border: #e2e8f0;
    --hi-radius: 12px;
    --hi-radius-sm: 6px;
    --hi-container: min(1200px, 100%);
    --hi-pad: clamp(1rem, 5vw, 5%);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.hi-page {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--hi-bg);
    color: var(--hi-text);
    line-height: 1.6;
    min-height: 100vh;
}

.hi-container {
    width: var(--hi-container);
    margin: 0 auto;
    padding-left: var(--hi-pad);
    padding-right: var(--hi-pad);
}

/* Header */
.hi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem var(--hi-pad);
    background: var(--hi-surface);
    border-bottom: 1px solid var(--hi-border);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: transform 0.25s ease;
}

.hi-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: var(--hi-primary);
    min-width: 0;
}

.hi-logo-wrap {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hi-logo-img,
.hi-logo-svg svg {
    width: 40px;
    height: 40px;
    object-fit: contain;
    display: block;
}

.hi-brand-text {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hi-brand-text em {
    font-style: normal;
    color: var(--hi-accent);
}

.hi-nav-desktop {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.hi-nav-desktop a {
    text-decoration: none;
    color: var(--hi-text);
    font-weight: 500;
    font-size: 0.92rem;
    transition: color 0.2s;
}

.hi-nav-desktop a:hover { color: var(--hi-accent); }

.hi-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hi-user-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--hi-text-light);
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hi-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1.15rem;
    border-radius: var(--hi-radius-sm);
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    line-height: 1.2;
}

.hi-btn-primary {
    background: var(--hi-accent);
    color: #fff;
    border-color: var(--hi-accent);
}

.hi-btn-primary:hover {
    background: var(--hi-accent-hover);
    border-color: var(--hi-accent-hover);
    color: #fff;
}

.hi-btn-secondary {
    background: transparent;
    color: var(--hi-primary);
    border-color: var(--hi-border);
}

.hi-btn-secondary:hover {
    border-color: var(--hi-primary);
    background: #fff;
}

.hi-btn-dark {
    background: var(--hi-primary);
    color: #fff;
}

.hi-btn-dark:hover {
    background: #1e293b;
    color: #fff;
}

.hi-btn-ghost {
    background: transparent;
    color: var(--hi-text-light);
    border: none;
    padding: 0.5rem;
    font-size: 1.1rem;
}

.hi-btn-ghost:hover { color: var(--hi-accent); }

.hi-menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--hi-border);
    border-radius: var(--hi-radius-sm);
    padding: 0.45rem;
    cursor: pointer;
    color: var(--hi-text);
}

.hi-mobile-nav {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0 var(--hi-pad) 1rem;
    background: var(--hi-surface);
    border-bottom: 1px solid var(--hi-border);
}

.hi-mobile-nav.is-open { display: flex; }

.hi-mobile-nav a,
.hi-mobile-nav button {
    text-align: left;
    padding: 0.65rem 0.75rem;
    border-radius: var(--hi-radius-sm);
    text-decoration: none;
    color: var(--hi-text);
    font-weight: 500;
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    width: 100%;
}

.hi-mobile-nav a:hover,
.hi-mobile-nav button:hover {
    background: var(--hi-bg);
    color: var(--hi-accent);
}

/* Hero */
.hi-hero {
    padding: clamp(4rem, 10vw, 7rem) var(--hi-pad);
    text-align: center;
    background: linear-gradient(145deg, #f1f5f9 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.hi-hero::before {
    content: '';
    position: absolute;
    top: -10%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(196, 30, 58, 0.07) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hi-hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(15, 23, 42, 0.04) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hi-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 820px;
    margin: 0 auto;
}

.hi-hero-badge {
    display: inline-block;
    margin-bottom: 1.25rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: var(--hi-accent-soft);
    color: var(--hi-accent-hover);
    border: 1px solid var(--hi-accent-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.hi-hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.75rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.04em;
    margin: 0 0 0.5rem;
    color: var(--hi-primary);
}

.hi-hero-subline {
    display: block;
    font-size: clamp(1.35rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--hi-accent);
    margin-top: 0.35rem;
}

.hi-hero-tagline {
    display: block;
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 500;
    color: var(--hi-text-light);
    margin-top: 0.5rem;
}

.hi-hero p.hi-lead {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    color: var(--hi-text-light);
    margin: 1.25rem auto 2rem;
    max-width: 620px;
}

.hi-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

/* Stats */
.hi-stats {
    background: var(--hi-surface);
    border-top: 1px solid var(--hi-border);
    border-bottom: 1px solid var(--hi-border);
    padding: 2rem var(--hi-pad);
}

.hi-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: var(--hi-container);
    margin: 0 auto;
}

.hi-stat { text-align: center; }

.hi-stat-value {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--hi-accent);
    font-variant-numeric: tabular-nums;
}

.hi-stat-label {
    font-size: 0.88rem;
    color: var(--hi-text-light);
    margin-top: 0.25rem;
}

/* Sections */
.hi-section {
    padding: clamp(3.5rem, 8vw, 5.5rem) var(--hi-pad);
}

.hi-section-white { background: var(--hi-surface); }
.hi-section-muted { background: var(--hi-bg); }

.hi-section-header {
    text-align: center;
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.hi-section-label {
    display: inline-block;
    margin-bottom: 0.75rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    background: var(--hi-accent-soft);
    color: var(--hi-accent-hover);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.hi-section-header h2 {
    font-size: clamp(1.75rem, 4vw, 2.35rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 0 0 0.75rem;
    color: var(--hi-primary);
}

.hi-section-header p {
    color: var(--hi-text-light);
    font-size: 1.05rem;
    margin: 0;
}

.hi-note {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--hi-text-light);
}

/* Features */
.hi-feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    max-width: var(--hi-container);
    margin: 0 auto;
}

.hi-feature-card {
    padding: 1.75rem;
    background: var(--hi-bg);
    border: 1px solid var(--hi-border);
    border-radius: var(--hi-radius);
    transition: transform 0.2s, box-shadow 0.2s;
}

.hi-feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.hi-feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--hi-accent-soft);
    color: var(--hi-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 1.15rem;
}

.hi-feature-icon svg {
    width: 24px;
    height: 24px;
}

.hi-feature-card h3 {
    font-size: 1.1rem;
    margin: 0 0 0.55rem;
    color: var(--hi-primary);
}

.hi-feature-card p {
    margin: 0;
    color: var(--hi-text-light);
    font-size: 0.93rem;
}

/* Courses */
.hi-course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: 1.25rem;
    max-width: var(--hi-container);
    margin: 0 auto;
}

.hi-course-card {
    background: var(--hi-surface);
    border: 1px solid var(--hi-border);
    border-radius: var(--hi-radius);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
}

.hi-course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.hi-course-tag {
    display: inline-block;
    padding: 0.25rem 0.7rem;
    background: var(--hi-bg);
    color: var(--hi-text-light);
    font-size: 0.75rem;
    border-radius: 999px;
    margin-bottom: 0.85rem;
    font-weight: 600;
    width: fit-content;
    text-transform: capitalize;
}

.hi-course-card h3 {
    font-size: 1.15rem;
    margin: 0 0 0.65rem;
    color: var(--hi-primary);
    line-height: 1.35;
}

.hi-course-desc {
    color: var(--hi-text-light);
    font-size: 0.93rem;
    margin: 0 0 1rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hi-course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: var(--hi-text-light);
}

.hi-course-price {
    font-weight: 700;
    color: var(--hi-accent);
    font-size: 1rem;
}

.hi-course-price.is-free { color: #16a34a; }

.hi-course-link {
    color: var(--hi-accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.92rem;
}

.hi-course-link:hover { text-decoration: underline; }

.hi-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--hi-text-light);
}

.hi-center-cta {
    text-align: center;
    margin-top: 2.5rem;
}

/* About */
.hi-about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2.5rem;
    align-items: center;
    max-width: var(--hi-container);
    margin: 0 auto;
}

.hi-about-copy h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    margin: 0 0 1rem;
    letter-spacing: -0.03em;
    color: var(--hi-primary);
}

.hi-about-copy p {
    color: var(--hi-text-light);
    margin: 0 0 1rem;
    font-size: 1rem;
}

.hi-check-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem 1.25rem;
    margin-top: 1.25rem;
}

.hi-check-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.92rem;
    color: var(--hi-text);
}

.hi-check-item svg {
    width: 18px;
    height: 18px;
    color: var(--hi-accent);
    flex-shrink: 0;
}

.hi-stats-panel {
    background: var(--hi-primary);
    color: #fff;
    border-radius: var(--hi-radius);
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.hi-stats-panel .hi-stat-value { color: #fff; }
.hi-stats-panel .hi-stat-label { color: #94a3b8; }

/* Team */
.hi-team-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: var(--hi-container);
    margin: 0 auto;
}

.hi-team-card {
    background: var(--hi-surface);
    border: 1px solid var(--hi-border);
    border-radius: var(--hi-radius);
    padding: clamp(1.5rem, 4vw, 2.5rem);
}

.hi-team-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
}

.hi-team-photo {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--hi-bg);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.hi-team-role {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    background: var(--hi-accent-soft);
    color: var(--hi-accent-hover);
    font-size: 0.72rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
}

.hi-team-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    color: var(--hi-primary);
}

.hi-team-bio p {
    color: var(--hi-text-light);
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
}

.hi-team-grid.is-reverse .hi-team-photo { order: 2; }
.hi-team-grid.is-reverse .hi-team-body { order: 1; }

/* Testimonials */
.hi-testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    max-width: var(--hi-container);
    margin: 0 auto;
}

.hi-testimonial-card {
    background: var(--hi-surface);
    border: 1px solid var(--hi-border);
    border-radius: var(--hi-radius);
    padding: 1.5rem;
}

.hi-testimonial-head {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 1rem;
}

.hi-testimonial-head img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.hi-testimonial-head h4 {
    margin: 0;
    font-size: 0.98rem;
}

.hi-testimonial-head p {
    margin: 0;
    font-size: 0.82rem;
    color: var(--hi-text-light);
}

.hi-stars {
    display: flex;
    gap: 0.15rem;
    margin-bottom: 0.75rem;
    color: #f59e0b;
}

.hi-stars .muted { color: #cbd5e1; }

.hi-testimonial-card blockquote {
    margin: 0;
    color: var(--hi-text-light);
    font-size: 0.93rem;
}

/* Footer */
.hi-footer {
    background: var(--hi-primary);
    color: #fff;
    padding: 3.5rem var(--hi-pad) 1.5rem;
}

.hi-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 2rem;
    max-width: var(--hi-container);
    margin: 0 auto 2rem;
}

.hi-footer-brand h2 {
    font-size: 1.25rem;
    margin: 0 0 0.75rem;
}

.hi-footer-brand p {
    color: #94a3b8;
    font-size: 0.92rem;
    max-width: 320px;
    margin: 0 0 1rem;
}

.hi-footer-social {
    display: flex;
    gap: 0.75rem;
}

.hi-footer-social a {
    color: #94a3b8;
    font-size: 1.15rem;
    transition: color 0.2s;
    text-decoration: none;
}

.hi-footer-social a:hover { color: #fff; }

.hi-footer h4 {
    font-size: 0.95rem;
    margin: 0 0 1rem;
    font-weight: 600;
}

.hi-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.hi-footer li { margin-bottom: 0.55rem; }

.hi-footer a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.88rem;
}

.hi-footer a:hover { color: #fff; }

.hi-footer-contact {
    color: #94a3b8;
    font-size: 0.88rem;
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.55rem;
}

.hi-footer-bottom {
    max-width: var(--hi-container);
    margin: 0 auto;
    padding-top: 1.5rem;
    border-top: 1px solid #334155;
    text-align: center;
    color: #94a3b8;
    font-size: 0.82rem;
}

/* Login modal */
.hi-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.hi-modal-backdrop.hidden { display: none; }

.hi-modal {
    background: #fff;
    border-radius: var(--hi-radius);
    padding: 2rem;
    width: 100%;
    max-width: 420px;
    position: relative;
    box-shadow: 0 25px 50px rgba(15, 23, 42, 0.15);
    animation: hiModalIn 0.25s ease;
}

@keyframes hiModalIn {
    from { opacity: 0; transform: scale(0.96) translateY(-8px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.hi-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--hi-text-light);
    cursor: pointer;
    padding: 0.25rem;
}

.hi-modal-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--hi-accent-hover), var(--hi-accent));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.hi-modal h2 {
    text-align: center;
    margin: 0 0 0.35rem;
    font-size: 1.35rem;
}

.hi-modal-sub {
    text-align: center;
    color: var(--hi-text-light);
    font-size: 0.92rem;
    margin-bottom: 1.5rem;
}

.hi-field { margin-bottom: 1rem; }

.hi-field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.hi-field input {
    width: 100%;
    padding: 0.7rem 0.85rem;
    border: 1px solid var(--hi-border);
    border-radius: var(--hi-radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
}

.hi-field input:focus {
    outline: none;
    border-color: var(--hi-accent);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.12);
}

.hi-modal-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    font-size: 0.85rem;
}

.hi-modal-row label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--hi-text-light);
}

.hi-link {
    color: var(--hi-accent);
    text-decoration: none;
}

.hi-link:hover { text-decoration: underline; }

.hi-alert-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    padding: 0.65rem 0.85rem;
    border-radius: var(--hi-radius-sm);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.hi-modal-foot {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.88rem;
    color: var(--hi-text-light);
}

.hi-btn-full { width: 100%; }

/* Animations */
.hi-fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.hi-fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.stats-counter { font-variant-numeric: tabular-nums; }

/* Responsive */
@media (max-width: 900px) {
    .hi-footer-grid { grid-template-columns: 1fr 1fr; }
    .hi-about-grid { grid-template-columns: 1fr; }
    .hi-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .hi-team-grid,
    .hi-team-grid.is-reverse {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hi-team-grid.is-reverse .hi-team-photo,
    .hi-team-grid.is-reverse .hi-team-body { order: unset; }
    .hi-team-photo { margin: 0 auto; }
    .hi-team-name { justify-content: center; }
}

@media (max-width: 768px) {
    .hi-nav-desktop { display: none; }
    .hi-menu-toggle { display: inline-flex; }
    .hi-header-actions .hi-btn-secondary { display: none; }
    .hi-user-name { display: none; }
    .hi-footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hi-stats-grid { grid-template-columns: 1fr 1fr; }
    .hi-hero-actions { flex-direction: column; align-items: stretch; }
    .hi-hero-actions .hi-btn { width: 100%; }
}