/* LearnEng — UK Mechanical Engineering Tutoring */

:root {
    --navy: #1a2744;
    --blue: #2c4a7c;
    --gold: #b8942e;
    --gold-light: #f5e6b8;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-400: #9ca3af;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--gray-800);
    background: var(--gray-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* -- Header / Hero -- */
.hero {
    background: var(--navy);
    color: var(--white);
    padding: 60px 20px;
    text-align: center;
}
.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.hero .subtitle {
    font-size: 1.15rem;
    opacity: 0.85;
    max-width: 500px;
    margin: 0 auto;
}

/* -- Page header (non-index) -- */
.page-header {
    background: var(--navy);
    color: var(--white);
    padding: 40px 20px;
    text-align: center;
}
.page-header h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}
.page-header p {
    opacity: 0.85;
    max-width: 500px;
    margin: 0 auto;
}
.back-link {
    display: inline-block;
    color: var(--gold-light);
    text-decoration: none;
    margin-bottom: 16px;
    font-size: 0.95rem;
}
.back-link:hover { text-decoration: underline; }

/* -- Video section -- */
.video-section {
    margin: 48px 0 40px;
    text-align: center;
}
.video-section h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--navy);
}
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    max-width: 720px;
    margin: 0 auto;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.video-wrapper iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: none;
}
.video-placeholder {
    max-width: 720px;
    margin: 0 auto;
    padding: 60px 20px;
    background: var(--gray-100);
    border-radius: var(--radius);
    color: var(--gray-600);
    font-style: italic;
}

/* -- About section -- */
.about-section {
    margin: 48px 0;
    text-align: center;
}
.about-section h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--navy);
}
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 24px;
}
.about-card {
    background: var(--white);
    padding: 28px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: left;
}
.about-card h3 {
    font-size: 1.1rem;
    color: var(--navy);
    margin-bottom: 8px;
}

/* -- CTA -- */
.cta-section {
    text-align: center;
    padding: 48px 0;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 40px 0;
}
.cta-section h2 {
    font-size: 1.5rem;
    color: var(--navy);
    margin-bottom: 8px;
}
.cta-section p {
    color: var(--gray-600);
    margin-bottom: 24px;
}

/* -- Buttons -- */
.btn-primary {
    display: inline-block;
    background: var(--gold);
    color: var(--navy);
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius);
    text-decoration: none;
    font-size: 1rem;
    transition: background 0.2s;
}
.btn-primary:hover { background: #d4a82c; }

.btn-secondary {
    display: inline-block;
    border: 2px solid var(--navy);
    color: var(--navy);
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius);
    text-decoration: none;
    font-size: 1rem;
    transition: background 0.2s, color 0.2s;
}
.btn-secondary:hover { background: var(--navy); color: var(--white); }

/* -- Pricing preview -- */
.pricing-preview {
    text-align: center;
    margin: 48px 0;
}
.pricing-preview h2 {
    font-size: 1.5rem;
    color: var(--navy);
    margin-bottom: 24px;
}
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}
.price-card {
    background: var(--white);
    padding: 28px 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.price-card.featured {
    border: 2px solid var(--gold);
    position: relative;
}
.price-card h3 {
    font-size: 1rem;
    color: var(--gray-600);
    margin-bottom: 12px;
}
.price-card .price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--navy);
}
.price-card .price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--gray-400);
}
.price-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* -- Pricing page (full) -- */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    padding: 48px 0;
}
.plan-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.plan-card.featured {
    border: 2px solid var(--gold);
}
.plan-badge {
    background: var(--gold);
    color: var(--navy);
    text-align: center;
    padding: 6px;
    font-weight: 600;
    font-size: 0.85rem;
}
.plan-header {
    padding: 32px 24px 20px;
    text-align: center;
}
.plan-header h2 {
    font-size: 1.2rem;
    color: var(--gray-600);
    margin-bottom: 8px;
}
.plan-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--navy);
}
.plan-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--gray-400);
}
.plan-features {
    list-style: none;
    padding: 0 24px 20px;
    flex: 1;
}
.plan-features li {
    padding: 8px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-600);
    font-size: 0.95rem;
}
.plan-features li:last-child { border-bottom: none; }
.plan-card .btn-primary {
    margin: 0 24px 24px;
    text-align: center;
}

/* -- Calendly -- */
.calendly-wrapper {
    margin: 32px 0;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.calendly-fallback {
    text-align: center;
    padding: 20px;
    color: var(--gray-600);
    font-size: 0.9rem;
}
.calendly-fallback a { color: var(--blue); }

/* -- Footer -- */
footer {
    background: var(--navy);
    color: var(--white);
    padding: 24px 20px;
    text-align: center;
    margin-top: 60px;
    opacity: 0.85;
    font-size: 0.9rem;
}
footer a {
    color: var(--gold-light);
    text-decoration: none;
}
footer a:hover { text-decoration: underline; }

/* -- Responsive -- */
@media (max-width: 640px) {
    .hero { padding: 40px 20px; }
    .hero h1 { font-size: 2rem; }
    .hero .subtitle { font-size: 1rem; }
    .pricing-grid { grid-template-columns: 1fr; }
    .plan-price { font-size: 2rem; }
}