/* =============================================
   Vienna Behavioral Circle — Global Styles
   Clean & Minimalist
   ============================================= */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600&family=Inter:wght@300;400;500;600&display=swap');

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

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f7f6f3;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --color-accent: #2c3e6b;      /* deep Vienna blue */
  --color-accent-light: #e8ecf4;
  --color-border: #e2e0da;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, sans-serif;
  --max-width: 900px;
  --nav-height: 68px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

section + section {
  border-top: 1px solid var(--color-border);
}

/* --- Navigation --- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-logo span {
  font-weight: 400;
  color: var(--color-text-muted);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: 0.3s;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 600; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; font-family: var(--font-sans); }

p { margin-bottom: 1.25rem; }
p:last-child { margin-bottom: 0; }

.section-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
  display: block;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: 3rem;
  line-height: 1.6;
}

/* --- Hero --- */
.hero {
  padding: 6rem 0 5rem;
  border-top: none;
}

.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--color-accent);
  margin-bottom: 1rem;
}

.hero h1 {
  margin-bottom: 1.75rem;
  max-width: 720px;
}

.hero-body {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.8rem 1.75rem;
  border-radius: 3px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: #1e2d52;
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --- Event Card (Next Event) --- */
.event-card {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  padding: 2.5rem;
  border-radius: 2px;
}

.event-card .event-date {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.event-card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.event-card p {
  color: var(--color-text-muted);
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.event-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.event-meta-item svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

/* --- Two-column layout (What We Do) --- */
.what-we-do-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

/* --- Past Editions Grid --- */
.editions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}

.edition-card {
  border: 1px solid var(--color-border);
  border-radius: 2px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.edition-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.edition-card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.edition-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.edition-card-body {
  padding: 1.5rem;
}

.edition-card-body .event-date {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.edition-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.speaker-list {
  list-style: none;
  margin-top: 0.75rem;
}

.speaker-list li {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.speaker-list li:last-child {
  border-bottom: none;
}

/* --- Team Grid --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-top: 2.5rem;
}

.team-member {
  text-align: center;
}

.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--color-accent-light);
  margin: 0 auto 1rem;
  overflow: hidden;
  border: 2px solid var(--color-border);
}

.team-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-member h4 {
  margin-bottom: 0.25rem;
}

.team-member .role {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.team-member .affiliation {
  font-size: 0.82rem;
  color: var(--color-accent);
  font-style: italic;
  margin-top: 0.2rem;
}

/* --- Contact / Signup --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.2s;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: var(--color-accent);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.signup-box {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  padding: 2rem;
  border-radius: 2px;
}

.signup-box h3 {
  margin-bottom: 0.75rem;
}

.signup-box p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

/* --- Event Index Rows --- */
.event-index-row {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: background 0.15s;
}

.event-index-row:first-child {
  border-top: 1px solid var(--color-border);
}

.event-index-row:hover {
  color: var(--color-accent);
}

.event-index-row:hover .event-index-arrow {
  transform: translateX(4px);
}

.event-index-date {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  flex-shrink: 0;
}

.event-index-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.event-index-body p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin: 0;
}

.event-index-arrow {
  font-size: 1.2rem;
  color: var(--color-accent);
  transition: transform 0.2s;
}

@media (max-width: 640px) {
  .event-index-row {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
  }
  .event-index-date {
    grid-column: 1;
    grid-row: 1;
  }
  .event-index-body {
    grid-column: 1;
    grid-row: 2;
  }
  .event-index-arrow {
    grid-column: 2;
    grid-row: 1 / 3;
  }
}

/* --- Footer --- */
footer {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  padding: 3rem 0;
  margin-top: 2rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* --- Utility --- */
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }

/* --- Responsive --- */
@media (max-width: 640px) {
  section { padding: 3.5rem 0; }
  .hero { padding: 3.5rem 0; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 2rem;
    gap: 1rem;
  }

  .nav-links.open { display: flex; }

  .nav-toggle { display: flex; }

  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }

  .what-we-do-cols { grid-template-columns: 1fr; gap: 2rem; }

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

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