:root {
  --ink: #1E1B4B;
  --violet: #4338CA;
  --violet-light: #6D28D9;
  --amber: #F59E0B;
  --bg: #FAFAF9;
  --card-bg: #FFFFFF;
  --border: #E7E5E4;
  --text: #292524;
  --text-muted: #6B7280;
  --radius: 14px;
  --shadow: 0 4px 20px rgba(30, 27, 75, 0.06);
  --shadow-hover: 0 10px 30px rgba(30, 27, 75, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

h1, h2, h3 { font-family: 'Poppins', 'Segoe UI', sans-serif; margin: 0; color: var(--ink); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 249, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand-logo { height: 44px; display: block; }

.nav { display: flex; gap: 28px; }
.nav a {
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}
.nav a:hover { color: var(--violet); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 72px;
  padding-bottom: 72px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--violet-light);
  margin: 0 0 12px;
}

.hero h1 {
  font-size: clamp(2.1rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: 18px;
}

.lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 28px;
  max-width: 52ch;
}

.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--violet), var(--ink));
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.hero-media {
  position: relative;
}

.presenter-photo {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  display: block;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* Series */
.series { padding: 40px 24px 80px; }
.series h2 { font-size: 1.8rem; margin-bottom: 8px; }
.section-sub { color: var(--text-muted); margin: 0 0 32px; }

.series-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.series-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}

.series-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--violet-light);
}

.series-date {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: var(--amber);
  text-transform: uppercase;
}

.series-title {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--ink);
}

/* Contact */
.contact {
  padding: 60px 24px 90px;
}

.contact-inner {
  background: linear-gradient(135deg, var(--ink), var(--violet));
  border-radius: 24px;
  padding: 48px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  color: #fff;
}

.contact-intro h2 { color: #fff; font-size: 1.7rem; margin-bottom: 12px; }
.contact-intro p { color: rgba(255,255,255,0.75); max-width: 32ch; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row { display: flex; flex-direction: column; gap: 6px; }

.form-row label {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
}

.form-row input,
.form-row textarea {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
}

.form-row input::placeholder,
.form-row textarea::placeholder { color: rgba(255,255,255,0.5); }

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--amber);
  background: rgba(255,255,255,0.14);
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

.contact-form .btn-primary {
  background: var(--amber);
  color: var(--ink);
  align-self: flex-start;
}

.form-status {
  margin: 0;
  font-size: 0.9rem;
  min-height: 1.2em;
  color: #FDE68A;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-mark { width: 24px; height: 24px; }

/* Responsive */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 40px; }
  .hero-media { order: -1; }
  .contact-inner { grid-template-columns: 1fr; padding: 32px; }
  .nav { gap: 18px; }
}