:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f9;
  --color-text: #1e2228;
  --color-text-muted: #5a6270;
  --color-primary: #2955a3;
  --color-primary-dark: #1e3f7d;
  --color-accent: #d98936;
  --color-border: #e3e6ea;
  --font-base: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2 { line-height: 1.15; }

.section { padding: 80px 0; }
.section:nth-of-type(even) { background: var(--color-bg-alt); }

.section-sub {
  color: var(--color-text-muted);
  max-width: 640px;
  margin-top: -8px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}
.logo span { color: var(--color-primary); }

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}
.nav a:hover { color: var(--color-primary); }

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 6px;
}
.nav-cta:hover { background: var(--color-primary-dark); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
}

/* Hero */
.hero {
  padding: 120px 0 90px;
  background: linear-gradient(135deg, #eef2fa 0%, #ffffff 60%);
}
.hero-inner { max-width: 720px; }
.hero h1 { font-size: 2.75rem; margin-bottom: 16px; }
.hero-sub { font-size: 1.15rem; color: var(--color-text-muted); margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  font-size: 1rem;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: transparent; border-color: var(--color-primary); color: var(--color-primary); }
.btn-secondary:hover { background: var(--color-primary); color: #fff; }

/* About */
.about-inner {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}
.about-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}
.about-facts {
  list-style: none;
  padding: 0;
  margin-top: 20px;
  display: grid;
  gap: 8px;
}
.about-facts li {
  background: var(--color-bg-alt);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.95rem;
}

/* Courses */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  margin: 32px 0 40px;
}
.subject-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  font-weight: 600;
}

.pricing-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 36px;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}
.price { font-size: 2.5rem; font-weight: 700; color: var(--color-primary); }
.price-unit { color: var(--color-text-muted); }
.pricing-note { color: var(--color-text-muted); margin: 12px 0 24px; }

/* Testimonials */
.placeholder-note {
  font-style: italic;
  color: var(--color-accent);
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin: 32px 0;
}
.testimonial-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 24px;
  margin: 0;
}
.testimonial-card p { margin: 0 0 12px; }
.testimonial-card cite { color: var(--color-text-muted); font-style: normal; font-size: 0.9rem; }
.testimonial-cta { margin-top: 8px; }
.testimonial-cta a { color: var(--color-primary); font-weight: 600; text-decoration: none; }

/* Booking */
.booking .container { text-align: center; }

/* Contact */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: start;
}
.contact-form {
  display: grid;
  gap: 6px;
  background: #fff;
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
}
.contact-form label { font-weight: 600; font-size: 0.9rem; margin-top: 12px; }
.contact-form input,
.contact-form select,
.contact-form textarea {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
}
.contact-form button { margin-top: 16px; justify-self: start; }
.contact-form button:disabled { opacity: 0.6; cursor: not-allowed; }
.contact-form[hidden] { display: none; }

.form-status {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
}
.form-status-success {
  background: #e6f4ea;
  color: #1e5b32;
  border: 1px solid #b7dfc4;
}
.form-status-error {
  background: #fdecea;
  color: #7a2018;
  border: 1px solid #f3c2bb;
}

/* Footer */
.site-footer {
  background: var(--color-text);
  color: #c9cdd4;
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.9rem;
}
.footer-inner a { color: #c9cdd4; }

/* Responsive */
@media (max-width: 800px) {
  .about-inner, .contact-inner { grid-template-columns: 1fr; }
  .about-photo { max-width: 200px; }
}

@media (max-width: 700px) {
  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px;
    gap: 16px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 2rem; }
}