/* ============================================
   QA Spring Meetup 2026 - Main Stylesheet
   ============================================ */

:root {
  --teal-dark: #0a1f2e;
  --teal-mid: #0d3347;
  --teal-light: #134d6b;
  --accent: #00e5c8;
  --accent-dim: #00b89e;
  --accent-glow: rgba(0, 229, 200, 0.15);
  --white: #ffffff;
  --text-light: #b0d4e0;
  --text-muted: #6a9ab0;
  --card-bg: rgba(13, 51, 71, 0.6);
  --border: rgba(0, 229, 200, 0.2);
  --gradient: linear-gradient(135deg, #0a1f2e 0%, #0d3347 50%, #0f3d57 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--teal-dark);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Typography ── */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}

.accent { color: var(--accent); }

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 31, 46, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-logo-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.nav-logo-text span {
  color: var(--accent);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-cta {
  background: var(--accent) !important;
  color: var(--teal-dark) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  font-weight: 700 !important;
  transition: background 0.2s, transform 0.2s !important;
}

.nav-cta:hover {
  background: var(--accent-dim) !important;
  transform: translateY(-1px);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 8rem 2rem 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient);
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 200, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 200, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  z-index: 0;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: rgba(0, 229, 200, 0.08);
  top: -100px;
  right: -100px;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: rgba(0, 229, 200, 0.05);
  bottom: 0;
  left: -50px;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-glow);
  border: 1px solid var(--border);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero-title .accent {
  display: block;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  max-width: 480px;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-light);
}

.hero-meta-item .icon {
  width: 36px;
  height: 36px;
  background: var(--accent-glow);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.hero-meta-item strong {
  color: var(--white);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--teal-dark);
}

.btn-primary:hover {
  background: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 229, 200, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.hero-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.countdown-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.countdown {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.countdown-item {
  text-align: center;
  background: rgba(0, 229, 200, 0.05);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 0.5rem;
}

.countdown-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
  line-height: 1;
}

.countdown-unit {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background: var(--accent-glow);
  border: 1px solid var(--border);
  color: var(--accent);
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ── Section Shared ── */
section {
  padding: 5rem 2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 580px;
}

.section-header {
  margin-bottom: 3rem;
}

/* ── About ── */
.about {
  background: linear-gradient(180deg, var(--teal-dark) 0%, var(--teal-mid) 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.2s, border-color 0.2s;
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.about-text p {
  color: var(--text-light);
  margin-bottom: 1rem;
}

.about-highlights {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-light);
}

.highlight-item .check {
  color: var(--accent);
  font-size: 1rem;
  margin-top: 0.1rem;
  flex-shrink: 0;
}

/* ── Agenda ── */
.agenda {
  background: var(--teal-mid);
  position: relative;
  overflow: hidden;
}

.agenda::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: linear-gradient(rgba(0, 229, 200, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 200, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.agenda-timeline {
  position: relative;
  z-index: 1;
}

.agenda-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.agenda-item::before {
  content: '';
  position: absolute;
  left: 148px;
  top: 24px;
  bottom: -1.5rem;
  width: 2px;
  background: var(--border);
}

.agenda-item:last-child::before {
  display: none;
}

.agenda-time {
  text-align: right;
  padding-top: 1rem;
}

.agenda-time span {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--border);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  white-space: nowrap;
}

.agenda-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  position: relative;
  transition: border-color 0.2s, transform 0.2s;
}

.agenda-card:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.agenda-card::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 20px;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--teal-mid);
}

.agenda-segment {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.agenda-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

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

.agenda-format {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-top: 0.5rem;
}

.format-presentation { background: rgba(59,130,246,0.15); color: #60a5fa; }
.format-panel { background: rgba(168,85,247,0.15); color: #c084fc; }
.format-workshop { background: rgba(245,158,11,0.15); color: #fbbf24; }
.format-opening { background: rgba(16,185,129,0.15); color: #34d399; }
.format-interactive { background: rgba(239,68,68,0.15); color: #f87171; }

/* ── Speakers ── */
.speakers {
  background: linear-gradient(180deg, var(--teal-dark) 0%, var(--teal-mid) 100%);
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.speaker-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.speaker-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.speaker-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 20px 50px rgba(0, 229, 200, 0.1);
}

.speaker-card:hover::before {
  transform: scaleX(1);
}

.speaker-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal-light), var(--accent));
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--teal-dark);
  border: 3px solid var(--border);
  transition: border-color 0.3s;
}

.speaker-card:hover .speaker-avatar {
  border-color: var(--accent);
}

.speaker-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.speaker-role {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.speaker-company {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.speaker-topic {
  font-size: 0.82rem;
  color: var(--text-light);
  background: var(--accent-glow);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  line-height: 1.4;
}

/* ── Topics ── */
.topics {
  background: var(--teal-mid);
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.topic-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all 0.2s;
}

.topic-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.topic-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.topic-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.topic-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Location ── */
.location {
  background: linear-gradient(180deg, var(--teal-dark) 0%, var(--teal-mid) 100%);
}

.location-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.location-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}

.location-map {
  width: 100%;
  height: 260px;
  background: var(--teal-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.location-map iframe {
  width: 100%;
  height: 100%;
  border: none;
  filter: hue-rotate(170deg) saturate(0.6) brightness(0.8);
}

.location-map-placeholder {
  text-align: center;
  color: var(--text-muted);
}

.location-map-placeholder .map-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 0.5rem;
}

.location-details {
  padding: 1.5rem;
}

.location-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.location-address {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.location-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.location-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.location-info-item .icon-box {
  width: 44px;
  height: 44px;
  background: var(--accent-glow);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.location-info-item h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.location-info-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ── CTA ── */
.cta-section {
  background: var(--teal-mid);
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 229, 200, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
  position: relative;
}

.cta-section p {
  color: var(--text-light);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.cta-note {
  font-size: 0.8rem !important;
  color: var(--text-muted) !important;
  margin-top: 1rem !important;
  margin-bottom: 0 !important;
}

/* ── Footer ── */
footer {
  background: var(--teal-dark);
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
  text-align: center;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--white);
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ── Register Page ── */
.register-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 4rem;
  background: var(--gradient);
  position: relative;
  overflow: hidden;
}

.register-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 200, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 200, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
}

.register-container {
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.register-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.register-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}

.register-header p {
  color: var(--text-light);
  font-size: 0.95rem;
}

.register-event-info {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.register-event-info .info-chip {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-light);
  background: var(--accent-glow);
  border: 1px solid var(--border);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
}

.register-form-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2.5rem;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.register-form-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), rgba(0, 229, 200, 0.3), transparent);
}

.progress-steps {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
}

.step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
}

.step-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  border: 2px solid var(--border);
  color: var(--text-muted);
  background: transparent;
  transition: all 0.3s;
  flex-shrink: 0;
}

.step-circle.active {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--teal-dark);
}

.step-circle.done {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--accent);
}

.step-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.step-label.active {
  color: var(--accent);
}

.step-connector {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 0.5rem;
  transition: background 0.3s;
}

.step-connector.done {
  background: var(--accent);
}

.form-step {
  display: none;
}

.form-step.active {
  display: block;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 0.4rem;
}

.form-group label .required {
  color: var(--accent);
  margin-left: 2px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-input {
  width: 100%;
  background: rgba(10, 31, 46, 0.8);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  color: var(--white);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 229, 200, 0.1);
}

.form-input.error {
  border-color: #f87171;
}

.error-msg {
  font-size: 0.75rem;
  color: #f87171;
  margin-top: 0.3rem;
  display: none;
}

.error-msg.show {
  display: block;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300e5c8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-select option {
  background: var(--teal-dark);
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.checkbox-input {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  accent-color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.checkbox-label {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.5;
}

.checkbox-label a {
  color: var(--accent);
  text-decoration: none;
}

.form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.5rem;
  gap: 1rem;
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* Success state */
.success-state {
  display: none;
  text-align: center;
  padding: 2rem 0;
}

.success-state.show {
  display: block;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: var(--accent-glow);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1.5rem;
  animation: successPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes successPop {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.success-state h2 {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
}

.success-state p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.success-email {
  color: var(--accent) !important;
  font-weight: 700;
}

.success-details {
  background: var(--accent-glow);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin: 1.5rem 0;
  text-align: left;
}

.success-details .detail-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-light);
  padding: 0.4rem 0;
}

.success-details .detail-row + .detail-row {
  border-top: 1px solid var(--border);
}

.spots-counter {
  background: var(--accent-glow);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.spots-text {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.spots-num {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 31, 46, 0.98);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 1.25rem;
  }

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

  .hamburger {
    display: flex;
  }

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

  .hero-card {
    display: none;
  }

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

  .about-stats {
    order: -1;
  }

  .agenda-item {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .agenda-item::before {
    display: none;
  }

  .agenda-time {
    text-align: left;
    padding-top: 0;
  }

  .agenda-card::before {
    display: none;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1.25rem;
  }

  .footer-logo {
    font-size: 0.9rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

  .progress-steps {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  section {
    padding: 3.5rem 1.25rem;
  }

  .register-form-card {
    padding: 1.5rem;
  }

  .hero {
    padding: 7rem 1.25rem 3rem;
  }
}

/* ── Hero Tagline ── */
.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

/* ── Speaker Cards with Photos ── */
.speakers-grid--3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.speaker-card--photo {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0;
  overflow: hidden;
}

.speaker-photo-wrap {
  width: 100%;
  height: 380px;
  overflow: hidden;
  position: relative;
  background: var(--teal-mid);
  flex-shrink: 0;
}

.speaker-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  transition: transform 0.4s ease;
}

.speaker-card--photo:hover .speaker-photo {
  transform: scale(1.04);
}

.speaker-photo-wrap--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--teal-mid), var(--teal-light));
}

.speaker-initials {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.5;
}

.speaker-info {
  padding: 1.5rem;
  width: 100%;
}

.speaker-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal-dark);
  background: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.6rem;
}

.speaker-badge--workshop {
  background: #fbbf24;
  color: #1a1000;
}

/* ── Agenda Featured Cards ── */
.agenda-card--featured {
  border-color: rgba(0, 229, 200, 0.4);
  background: rgba(13, 51, 71, 0.9);
}

.agenda-card--featured::after {
  content: '★ Keynote';
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
}

.agenda-speaker-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top;
  vertical-align: middle;
  margin-right: 0.3rem;
  border: 1px solid var(--border);
}

/* ── Panel Section ── */
.panel-section {
  background: var(--teal-dark);
  position: relative;
  overflow: hidden;
}

.panel-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0, 229, 200, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 200, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}

.panel-section .container {
  position: relative;
  z-index: 1;
}

.panel-guests {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.panel-guest-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s;
}

.panel-guest-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.panel-guest-card--tbd {
  border-style: dashed;
  opacity: 0.7;
}

.panel-guest-card--tbd:hover {
  opacity: 1;
}

.panel-guest-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: var(--teal-mid);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-muted);
  margin: 0 auto 1rem;
  overflow: hidden;
}
.panel-guest-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.panel-guest-name {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text-light);
}

.panel-guest-company {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.panel-questions {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.panel-block {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.panel-block:hover {
  border-color: var(--accent);
}

.panel-block-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.panel-q-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.panel-q-list li {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.5;
  padding-left: 1rem;
  position: relative;
}

.panel-q-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ── Footer Social ── */
.footer-social {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* ── Mobile: New Sections ── */
@media (max-width: 900px) {
  .speakers-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .panel-questions {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .speakers-grid--3 {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .speaker-photo-wrap {
    height: 300px;
  }

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

  .agenda-card--featured::after {
    display: none;
  }
}

/* ── Language Switcher ── */
.lang-switcher {
  display: flex;
  gap: 0.25rem;
  align-items: center;
  margin-left: 0.5rem;
}
.lang-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  letter-spacing: 0.05em;
}
.lang-btn:hover,
.lang-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--teal-dark);
}