/* ============================================
   DEFCON GROUP CASABLANCA
   Dark Circuit-Board Aesthetic
   ============================================ */

:root {
  --color-bg:        #060d07;
  --color-bg-card:   rgba(0, 20, 8, 0.7);
  --color-border:    rgba(0, 180, 60, 0.25);
  --color-border-hi: rgba(0, 220, 80, 0.5);

  --color-green:     #3aad5a;
  --color-green-hi:  #5fcc7a;

  --color-text:      #e8f0e9;
  --color-text-dim:  #8aaa90;
  --color-text-mute: #4a6a50;

  --font-mono: 'Courier New', 'Consolas', monospace;

  --gap:   1.5rem;
  --gap-lg: 2.5rem;
  --gap-xl: 4rem;
  --max-w: 1200px;
}

/* ============================================
   BASE
   ============================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-mono);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;

  /* Circuit board background */
  background-image:
    /* grid lines */
    repeating-linear-gradient(0deg,   transparent, transparent 59px, rgba(0, 180, 60, 0.06) 60px),
    repeating-linear-gradient(90deg,  transparent, transparent 59px, rgba(0, 180, 60, 0.06) 60px),
    /* glow pools */
    radial-gradient(ellipse at 15% 20%,  rgba(0, 100, 30, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 75%,  rgba(0, 80,  25, 0.14) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%,  rgba(0, 50,  15, 0.1)  0%, transparent 70%);
}

a { color: var(--color-green-hi); text-decoration: none; transition: color 0.2s; }
a:hover { color: #fff; }

h1, h2, h3, h4 {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

p { color: var(--color-text-dim); margin-bottom: 0.75rem; }

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gap);
}

.section {
  padding: var(--gap-xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--gap-lg);
}

.section-title {
  font-size: 1.6rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

.section-title::before {
  content: '> ';
  color: var(--color-green);
}

.section-subtitle {
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  background-color: rgba(6, 13, 7, 0.95);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.navbar-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.9rem var(--gap);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.navbar-logo img {
  height: 36px;
  object-fit: contain;
}

.navbar-logo-text {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: var(--gap-lg);
}

.navbar-menu a {
  color: var(--color-text-dim);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.navbar-menu a:hover,
.navbar-menu a.active {
  color: var(--color-text);
  border-bottom-color: var(--color-green);
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}
.navbar-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* extra circuit glow on hero */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 60%, rgba(0, 140, 50, 0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
}

.hero-edition {
  display: inline-block;
  border: 1px solid var(--color-border-hi);
  color: var(--color-green-hi);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.4rem 1.2rem;
  margin-bottom: 1.5rem;
}

.hero-glitch {
  font-size: 3.2rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  line-height: 1.1;
}

.hero-tagline {
  font-size: 1.5rem;
  color: var(--color-green-hi);
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
  font-weight: 600;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.hero-meta-item {
  color: var(--color-text-dim);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.hero-meta-item .icon {
  color: var(--color-green);
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--color-border-hi);
  color: var(--color-green-hi);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover {
  background: var(--color-green);
  border-color: var(--color-green);
  color: #000;
  transform: translateY(-1px);
}

/* ============================================
   SCHEDULE
   ============================================ */
.schedule-container {
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  overflow: hidden;
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
}

/* Column widths */
.schedule-table th:nth-child(1),
.schedule-table td.col-time  { width: 160px; }
.schedule-table th:nth-child(3),
.schedule-table td.col-speaker { width: 220px; }

.schedule-table thead {
  background: rgba(0, 180, 60, 0.12);
  border-bottom: 1px solid var(--color-border-hi);
}

.schedule-table th {
  padding: 1rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-green-hi);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: left;
}

.schedule-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.schedule-table tbody tr:last-child td {
  border-bottom: none;
}

.schedule-table tbody tr:hover {
  background: rgba(0, 180, 60, 0.04);
}

/* Time cell */
td.col-time .schedule-time {
  color: var(--color-green-hi);
  font-weight: 700;
  font-size: 0.95rem;
  white-space: nowrap;
}

/* Title cell */
.schedule-title {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.95rem;
}

/* Speaker cell */
td.col-speaker {
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

/* Welcome / full-width header row */
.schedule-table tr.row-header td {
  background: rgba(0, 180, 60, 0.15);
  border-bottom: 1px solid var(--color-border-hi);
  text-align: center;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
  letter-spacing: 0.04em;
  padding: 1.1rem;
}

/* Break & Networking row */
.schedule-table tr.row-break td {
  background: rgba(0, 0, 0, 0.25);
  text-align: center;
  font-style: italic;
  color: var(--color-green);
  font-size: 0.85rem;
  padding: 0.65rem;
  border-color: rgba(0, 180, 60, 0.15);
}

/* Closing row */
.schedule-table tr.row-closing td {
  background: rgba(0, 180, 60, 0.12);
  text-align: center;
  font-weight: 700;
  color: var(--color-text);
  font-size: 0.95rem;
  padding: 1rem;
  border-top: 1px solid var(--color-border-hi);
  border-bottom: none;
}

/* ============================================
   SPONSORS
   ============================================ */
.sponsor-tier { margin-bottom: var(--gap-xl); }

.sponsor-tier-title {
  text-align: center;
  font-size: 1rem;
  color: var(--color-text-dim);
  letter-spacing: 0.1em;
  margin-bottom: var(--gap);
}

.sponsor-grid {
  display: grid;
  gap: var(--gap);
  justify-items: center;
}
.sponsor-grid.tier-1 { grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); }
.sponsor-grid.tier-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.sponsor-grid.tier-3 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.sponsor-logo {
  width: 100%;
  max-width: 240px;
  aspect-ratio: 3 / 1;
  background-color: transparent;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  transition: border-color 0.2s;
}

.sponsor-logo img {
  max-width: 100%;
  max-height: 36px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.sponsor-logo:hover {
  border-color: var(--color-border-hi);
}

/* ============================================
   EDITIONS
   ============================================ */
.editions-group-label {
  font-size: 0.8rem;
  color: var(--color-green);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: var(--gap-lg) 0 var(--gap) 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.editions-group-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--gap);
}

.archive-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--gap);
  transition: border-color 0.2s;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.archive-card:hover {
  border-color: var(--color-border-hi);
}

.archive-year {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-green-hi);
  letter-spacing: 0.06em;
}

.archive-description {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin: 0;
}

.archive-empty {
  text-align: center;
  padding: var(--gap-lg);
  color: var(--color-text-mute);
  font-size: 0.9rem;
  border: 1px dashed var(--color-border);
}

/* ============================================
   GALLERY  (edition pages)
   ============================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.gallery-item {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  transition: border-color 0.2s;
}

.gallery-item:hover { border-color: var(--color-border-hi); }

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.gallery-item:hover img { transform: scale(1.04); }

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  opacity: 0;
  transition: opacity 0.2s;
  display: flex;
  align-items: flex-end;
  padding: 1rem;
}

.gallery-item:hover .gallery-overlay { opacity: 1; }

.gallery-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.95);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.lightbox.active { display: flex; }
.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border: 1px solid var(--color-border);
}

/* Video cards (edition pages) */
.archive-grid .video-card {
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  overflow: hidden;
  transition: border-color 0.2s;
}
.archive-grid .video-card:hover { border-color: var(--color-border-hi); }

.video-thumbnail {
  position: relative;
  padding-bottom: 56.25%;
  background: #000;
}
.video-thumbnail iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}
.video-info { padding: 1rem; }
.video-title { font-size: 0.95rem; font-weight: 600; color: var(--color-text); margin-bottom: 0.25rem; }
.video-speaker { font-size: 0.85rem; color: var(--color-text-dim); }

/* Speaker cards (edition pages) */
.speaker-card {
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  padding: var(--gap);
  transition: border-color 0.2s;
}
.speaker-card:hover { border-color: var(--color-border-hi); }
.speaker-name { font-size: 1.05rem; font-weight: 700; color: var(--color-text); margin-bottom: 0.2rem; }
.speaker-title { font-size: 0.82rem; color: var(--color-green-hi); margin-bottom: 0.75rem; }
.speaker-bio { font-size: 0.88rem; color: var(--color-text-dim); line-height: 1.5; }

/* ============================================
   FOOTER
   ============================================ */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--gap-lg) 0;
  margin-top: var(--gap-xl);
}

.footer-terminal {
  border: 1px solid var(--color-border);
  padding: 1rem;
  margin-bottom: var(--gap);
  font-size: 0.78rem;
}
.footer-terminal p { color: var(--color-text-dim); margin: 0.2rem 0; }

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--gap);
  margin-bottom: var(--gap);
}

.footer-section h4 {
  font-size: 0.78rem;
  color: var(--color-text);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.footer-section ul { list-style: none; }
.footer-section ul li { margin-bottom: 0.35rem; }
.footer-section ul li a { color: var(--color-text-dim); font-size: 0.82rem; }
.footer-section ul li a:hover { color: var(--color-text); }

.footer-bottom {
  text-align: center;
  border-top: 1px solid var(--color-border);
  padding-top: var(--gap);
  color: var(--color-text-mute);
  font-size: 0.78rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .hero-glitch { font-size: 2rem; }
  .hero-tagline { font-size: 1.1rem; }

  .navbar-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: rgba(6, 13, 7, 0.98);
    flex-direction: column;
    padding: var(--gap);
    border-bottom: 1px solid var(--color-border);
  }
  .navbar-menu.active { display: flex; }
  .navbar-toggle { display: flex; }

  .schedule-table { font-size: 0.82rem; }
  .schedule-table th,
  .schedule-table td { padding: 0.75rem; }
  .schedule-table th:nth-child(1),
  .schedule-table td.col-time { width: 100px; }
  .schedule-table th:nth-child(3),
  .schedule-table td.col-speaker { width: auto; }

  .archive-grid { grid-template-columns: 1fr; }
  .sponsor-grid.tier-1 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .hero-glitch { font-size: 1.6rem; }
  .section { padding: 2.5rem 0; }
}