/* ==========================================================================
   AgentFramework.dev Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors - Dark Theme (Default) */
  --color-background: #0b0d12;
  --color-surface: rgba(255, 255, 255, 0.06);
  --color-surface-elevated: rgba(255, 255, 255, 0.10);
  --color-text-primary: rgba(255, 255, 255, 0.92);
  --color-text-secondary: rgba(255, 255, 255, 0.70);
  --color-text-tertiary: rgba(255, 255, 255, 0.55);
  --color-link: rgba(255, 255, 255, 0.92);
  --color-border: rgba(255, 255, 255, 0.25);
  --color-shadow: rgba(0, 0, 0, 0.35);

  /* Typography */
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Spacing & Layout */
  --container-max-width: 900px;
  --spacing-xs: 6px;
  --spacing-sm: 10px;
  --spacing-md: 14px;
  --spacing-lg: 18px;
  --spacing-xl: 26px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-card: 0 12px 40px var(--color-shadow);
}

/* Light Theme */
@media (prefers-color-scheme: light) {
  :root {
    --color-background: #f7f8fb;
    --color-surface: rgba(0, 0, 0, 0.04);
    --color-surface-elevated: rgba(0, 0, 0, 0.06);
    --color-text-primary: rgba(0, 0, 0, 0.88);
    --color-text-secondary: rgba(0, 0, 0, 0.70);
    --color-text-tertiary: rgba(0, 0, 0, 0.56);
    --color-link: rgba(0, 0, 0, 0.88);
    --color-border: rgba(0, 0, 0, 0.16);
    --color-shadow: rgba(0, 0, 0, 0.12);
  }
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background:
    radial-gradient(1200px 800px at 10% 10%, rgba(120, 130, 255, 0.25), transparent 60%),
    radial-gradient(900px 700px at 90% 20%, rgba(30, 180, 255, 0.18), transparent 55%),
    radial-gradient(700px 700px at 50% 95%, rgba(255, 130, 200, 0.12), transparent 50%),
    var(--color-background);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  line-height: 1.2;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding-left: var(--spacing-lg);
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  opacity: 0.9;
}

/* Focus States */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-border);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 28px var(--spacing-lg) 54px;
}

/* --------------------------------------------------------------------------
   Site Header
   -------------------------------------------------------------------------- */
.site-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  padding: var(--spacing-sm) 0 24px;
}

.site-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.site-logo {
  width: 120px;
  height: auto;
  flex-shrink: 0;
}

.site-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.site-tagline {
  font-size: 12px;
  margin-top: 2px;
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav-primary {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.nav-primary a {
  text-decoration: none;
  padding: 9px 12px;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  background: linear-gradient(180deg, var(--color-surface), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.card__label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-sm);
}

.card__title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.2px;
  margin-bottom: var(--spacing-sm);
}

.card__body {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.card__body + .card__body {
  margin-top: var(--spacing-sm);
}

.card__list {
  margin-top: var(--spacing-sm);
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero__title {
  font-size: 44px;
  line-height: 1.08;
  letter-spacing: -0.6px;
  margin: var(--spacing-xs) 0 var(--spacing-sm);
}

.hero__lead {
  color: var(--color-text-secondary);
  font-size: 16px;
  margin-bottom: 16px;
}

@media (max-width: 520px) {
  .hero__title {
    font-size: 36px;
  }
}

/* --------------------------------------------------------------------------
   Buttons & CTAs
   -------------------------------------------------------------------------- */
.cta-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  padding: 11px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(135deg, rgba(120, 130, 255, 0.95), rgba(40, 190, 255, 0.78));
  border-color: rgba(255, 255, 255, 0.24);
}

/* --------------------------------------------------------------------------
   Images
   -------------------------------------------------------------------------- */
.memory-image {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
  border: 1px solid var(--color-border);
}

.sponsor-logo {
  max-width: 240px;
  height: auto;
  margin-top: var(--spacing-md);
  background: white;
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   Partner Grid
   -------------------------------------------------------------------------- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.partner-card {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.partner-card__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.2px;
  margin-bottom: var(--spacing-xs);
}

.partner-card__description {
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   Sponsors
   -------------------------------------------------------------------------- */
.sponsor-section {
  margin-top: var(--spacing-md);
}

.sponsor-info {
  margin-top: var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   Definition Lists (Event Details)
   -------------------------------------------------------------------------- */
dl.card__body {
  margin: 0;
}

dl.card__body dt {
  display: inline;
}

dl.card__body dd {
  display: inline;
  margin: 0;
}

dl.card__body dd::after {
  content: '';
  display: block;
  margin-bottom: var(--spacing-xs);
}

/* --------------------------------------------------------------------------
   Contact Info
   -------------------------------------------------------------------------- */
.contact-info {
  font-style: normal;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.contact-info a {
  color: var(--color-link);
}

/* --------------------------------------------------------------------------
   Site Footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-tertiary);
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: space-between;
  align-items: center;
}

.site-footer__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.site-footer__separator {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.site-footer__note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* --------------------------------------------------------------------------
   Responsive Adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 860px) {
  .site-header {
    align-items: center;
    flex-direction: column;
  }

  .nav-primary {
    justify-content: center;
  }
}