/* ==========================================================================
   GAiN-Z Poland 2026 - Modern Sleek Stylesheet (Dark & Light Modes)
   ========================================================================== */

:root {
  /* Brand Accent Gradients */
  --brand-purple: #8b5cf6;
  --brand-purple-dark: #6d28d9;
  --brand-blue: #3b82f6;
  --brand-cyan: #06b6d4;
  --gradient-brand: linear-gradient(135deg, #9333ea 0%, #3b82f6 50%, #06b6d4 100%);
  --gradient-brand-subtle: linear-gradient(135deg, rgba(147, 51, 234, 0.12) 0%, rgba(6, 182, 212, 0.12) 100%);

  /* Default Dark Mode Variables */
  --bg-page: #090d16;
  --bg-subtle: #0f1422;
  --bg-surface: #141b2d;
  --bg-surface-elevated: #1b243b;
  --bg-header: rgba(9, 13, 22, 0.85);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.12);
  --border-focus: #38bdf8;
  
  --text-main: #f8fafc;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-accent: #38bdf8;
  --text-purple: #c084fc;

  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  --card-shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.6);

  /* Layout */
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --line-height: 1.65;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-page: #f8fafc;
  --bg-subtle: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f8fafc;
  --bg-header: rgba(248, 250, 252, 0.88);
  
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-card: rgba(0, 0, 0, 0.09);
  --border-focus: #0284c7;
  
  --text-main: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-accent: #0284c7;
  --text-purple: #7c3aed;

  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 14px 30px rgba(0, 0, 0, 0.1);
}

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

[hidden] {
  display: none !important;
}

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

body {
  font-family: var(--font-family);
  line-height: var(--line-height);
  color: var(--text-main);
  background-color: var(--bg-page);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 250ms ease, color 250ms ease;
  -webkit-font-smoothing: antialiased;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -80px;
  left: 20px;
  background: var(--text-accent);
  color: #090d16;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top 200ms ease;
}

.skip-link:focus {
  top: 16px;
  outline: 3px solid var(--border-focus);
}

:focus-visible {
  outline: 3px solid var(--border-focus);
  outline-offset: 3px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--text-accent);
  text-decoration: none;
  transition: color 150ms ease;
}

a:hover {
  text-decoration: underline;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- Simplified Header & Navbar ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color 250ms ease, border-color 250ms ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 16px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo {
  height: 42px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 6px;
}

.nav-link {
  color: var(--text-body);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: color 150ms ease, background-color 150ms ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-main);
  background-color: var(--border-subtle);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Language Switcher */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: all 150ms ease;
  min-height: 30px;
  min-width: 32px;
  text-align: center;
}

.lang-btn:hover {
  color: var(--text-main);
}

.lang-btn.active {
  background: var(--bg-surface);
  color: var(--brand-purple);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .lang-btn.active {
  color: var(--brand-purple-dark);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  font-size: 1.15rem;
  transition: all 200ms ease;
}

.theme-toggle-btn:hover {
  background: var(--border-subtle);
  transform: scale(1.05);
}

.theme-toggle-btn svg {
  display: block;
  stroke: currentColor;
  transition: transform 200ms ease;
}

.theme-toggle-btn:hover svg {
  transform: rotate(20deg);
}

.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

/* ---------------- Buttons & CTAs ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-weight: 700;
  font-size: 0.98rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  min-height: 48px;
  transition: transform 150ms ease, box-shadow 150ms ease, filter 150ms ease;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff !important;
  box-shadow: 0 4px 18px rgba(147, 51, 234, 0.35);
  border: none;
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.45);
  text-decoration: none;
}

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--text-main) !important;
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--border-subtle);
  text-decoration: none;
}

.btn-sm {
  padding: 7px 15px;
  font-size: 0.85rem;
  min-height: 38px;
  white-space: nowrap;
}

/* ---------------- Section Standard ---------------- */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px auto;
}

.section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--gradient-brand-subtle);
  color: var(--brand-purple);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

[data-theme="light"] .section-badge {
  color: var(--brand-purple-dark);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.9rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 16px;
}

.section-lead {
  font-size: 1.15rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* ---------------- Post-Conference Thank You Section ---------------- */
.post-conf-section {
  padding: 60px 0 70px 0;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-page) 100%);
  border-bottom: 1px solid var(--border-card);
  position: relative;
}

.post-conf-wrapper {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.post-conf-main-title {
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #38bdf8;
  text-align: center;
  margin: 0 auto 32px auto;
  max-width: 860px;
}

[data-theme="light"] .post-conf-main-title {
  color: #0070c0;
}

.post-conf-img-wrap {
  width: 100%;
  max-width: 920px;
  margin: 0 auto 36px auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-card);
  background: var(--bg-surface);
}

[data-theme="light"] .post-conf-img-wrap {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.post-conf-banner-wrap {
  margin-bottom: 20px;
}

.post-conf-img {
  width: 100%;
  height: auto;
  display: block;
}

.post-conf-banner-link {
  display: block;
  width: 100%;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s ease, filter 0.25s ease;
}

.post-conf-banner-link:hover {
  filter: brightness(1.05);
}

.post-conf-block {
  max-width: 820px;
  margin: 0 auto 36px auto;
  text-align: center;
}

.post-conf-sub-title {
  font-size: clamp(1.35rem, 2.7vw, 1.85rem);
  font-weight: 800;
  line-height: 1.3;
  color: #60a5fa;
  margin: 0 auto 16px auto;
}

[data-theme="light"] .post-conf-sub-title {
  color: #0070c0;
}

.post-conf-heading {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-main);
  margin: 0 auto 14px auto;
}

.post-conf-desc {
  font-size: clamp(1.1rem, 2.1vw, 1.25rem);
  line-height: 1.7;
  color: var(--text-body);
  margin: 0 auto;
}

.post-conf-survey-card {
  max-width: 920px;
  margin: 0 auto 42px auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.post-conf-survey-cta {
  margin-top: 4px;
}

.post-conf-outro {
  margin-top: 28px;
  margin-bottom: 0;
}

.post-conf-motto {
  font-size: clamp(1.15rem, 2.3vw, 1.35rem);
  font-weight: 800;
  color: var(--text-main);
  margin: 22px auto 8px auto;
  letter-spacing: -0.01em;
}

.post-conf-see-you {
  font-size: clamp(1.3rem, 2.6vw, 1.6rem);
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0 auto;
}

[data-theme="light"] .post-conf-see-you {
  background: linear-gradient(135deg, #7c3aed 0%, #2563eb 50%, #0891b2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.post-conf-see-you-link {
  color: inherit;
  text-decoration: none;
  background: inherit;
  -webkit-background-clip: inherit;
  -webkit-text-fill-color: inherit;
  display: inline-block;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.post-conf-see-you-link:hover {
  opacity: 0.85;
  transform: translateY(-2px);
}

/* ---------------- Hero Section ---------------- */
.hero-section {
  padding: 60px 0 90px 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--brand-blue);
}

.hero-title {
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.hero-title .text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-motto {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brand-purple);
  letter-spacing: -0.01em;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-body);
  line-height: 1.75;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-tag {
  padding: 5px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-body);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 6px;
}

/* Registration Closed Banner */
.hero-closed-banner {
  margin-top: 48px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
}

.hero-closed-title {
  font-size: clamp(1.4rem, 2.8vw, 1.85rem);
  font-weight: 800;
  color: #7c3aed;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0;
}

[data-theme="light"] .hero-closed-title {
  color: #6d28d9;
}

.hero-closed-desc {
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  max-width: 860px;
}

[data-theme="light"] .hero-closed-desc {
  background: linear-gradient(135deg, #7c3aed 0%, #2563eb 50%, #0891b2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-closed-cta {
  margin-top: 14px;
}

.hero-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--card-shadow);
}

.hero-img-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  margin-bottom: 20px;
}

.hero-img-wrap img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.countdown-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.countdown-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.countdown-item {
  background: var(--bg-surface);
  padding: 10px 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.countdown-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.countdown-lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 4px;
}

/* ---------------- About Section ---------------- */
.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}

.about-intro-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-invite-text {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-body);
  margin: 0;
}

.about-lang-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
  width: fit-content;
}

.about-lang-badge svg {
  flex-shrink: 0;
  stroke: var(--brand-purple);
}

[data-theme="light"] .about-lang-badge svg {
  stroke: var(--brand-purple-dark);
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.about-visual img {
  width: 100%;
  height: auto;
  aspect-ratio: 1024 / 401;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-card);
  display: block;
}

.about-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding: 26px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(139, 92, 246, 0.35);
}

.feature-icon-box {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--gradient-brand-subtle);
  border: 1px solid rgba(139, 92, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-purple);
}

.feature-icon-box svg {
  width: 24px;
  height: 24px;
  stroke: var(--brand-purple);
  display: block;
}

[data-theme="light"] .feature-icon-box svg {
  stroke: var(--brand-purple-dark);
}

.feature-info h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.feature-info p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-body);
  margin: 0;
}

.about-organizer-note {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------------- Speakers Section ---------------- */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

.speaker-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.speaker-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.speaker-photo-box {
  position: relative;
  width: 100%;
  height: 400px;
  background: radial-gradient(circle at 50% 120%, rgba(139, 92, 246, 0.25), var(--bg-subtle) 70%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}

.speaker-photo {
  max-height: 95%;
  width: auto;
  object-fit: contain;
  transition: transform 300ms ease;
}

.speaker-card:hover .speaker-photo {
  transform: scale(1.02);
}

.speaker-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 6px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-accent);
}

.speaker-content {
  padding: 30px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.speaker-name {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}

.speaker-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--brand-purple);
  margin-bottom: 16px;
}

[data-theme="light"] .speaker-title {
  color: var(--brand-purple-dark);
}

.speaker-bio {
  color: var(--text-body);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* ---------------- Programme / Schedule Section ---------------- */
.schedule-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--card-shadow);
}

.tabs-nav {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
  margin-bottom: 28px;
  overflow-x: auto;
}

.tab-btn {
  padding: 12px 24px;
  background: var(--bg-subtle);
  color: var(--text-body);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  cursor: pointer;
  transition: all 150ms ease;
  min-height: 52px;
}

.tab-btn:hover {
  background: var(--border-subtle);
  color: var(--text-main);
}

.tab-btn.active {
  background: var(--gradient-brand);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.35);
}

.tab-btn.active .tab-sub {
  color: rgba(255, 255, 255, 0.85);
}

.tab-main {
  font-size: 1.05rem;
}

.tab-sub {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.schedule-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.schedule-list[hidden] {
  display: none !important;
}

.schedule-item {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 20px;
  padding: 18px 22px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  align-items: center;
  transition: border-color 150ms ease;
}

.schedule-item:hover {
  border-color: rgba(56, 189, 248, 0.4);
}

.schedule-item.highlight {
  border-left: 4px solid var(--brand-cyan);
  background: rgba(6, 182, 212, 0.05);
}

.schedule-time {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-accent);
}

.schedule-detail h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.schedule-speaker {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-purple);
}

/* ---------------- Venue Section (Gallery & Details) ---------------- */
.venue-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.venue-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.venue-gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-card);
  background: var(--bg-surface);
  box-shadow: var(--card-shadow);
}

.venue-gallery-item.span-2 {
  grid-column: span 2;
}

.venue-gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 300ms ease;
}

.venue-gallery-item.span-2 img {
  height: 250px;
}

.venue-gallery-item:hover img {
  transform: scale(1.03);
}

.venue-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Venue Room Buttons */
.venue-rooms-wrap {
  margin: 6px 0 10px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.venue-rooms-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.venue-rooms-btns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.venue-room-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease, border-color 180ms ease, background-color 180ms ease;
  min-height: 48px;
  white-space: nowrap;
}

.venue-room-btn:active {
  transform: translateY(1px);
}

.venue-room-btn.btn-dormitory {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-card);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.venue-room-btn.btn-dormitory:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--brand-purple);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  text-decoration: none;
}

.venue-room-btn.btn-guest {
  background: var(--gradient-brand);
  color: #ffffff !important;
  border: 1px solid transparent;
  box-shadow: 0 4px 18px rgba(147, 51, 234, 0.38);
}

.venue-room-btn.btn-guest:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.5);
  text-decoration: none;
}

[data-theme="light"] .venue-room-btn.btn-dormitory {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.15);
  color: var(--text-main);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .venue-room-btn.btn-dormitory:hover {
  background: #f8fafc;
  border-color: var(--brand-purple);
  color: var(--brand-purple-dark);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}

.venue-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}

.venue-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
  color: var(--text-body);
}

.venue-feature-item .icon {
  color: var(--text-accent);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1;
}

/* ---------------- Participation Fees / Pricing Section ---------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--card-shadow);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.pricing-card.featured {
  border: 2px solid var(--brand-purple);
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-subtle) 100%);
}

.pricing-popular-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #ffffff;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pricing-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 0.95rem;
  color: var(--text-body);
  margin-bottom: 24px;
  min-height: 48px;
}

.pricing-price-wrap {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-amount {
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.pricing-pln {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-accent);
  margin-top: 6px;
}

.pricing-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
  flex-grow: 1;
}

.pricing-item {
  font-size: 0.95rem;
  color: var(--text-body);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.pricing-item.active {
  color: var(--text-main);
  font-weight: 600;
}

.pricing-item.disabled {
  color: var(--text-muted);
  opacity: 0.7;
}

/* Single Unified CTA for Registration */
.pricing-cta-wrap {
  margin-top: 40px;
  text-align: center;
}

.pricing-note {
  margin-top: 20px;
  text-align: center;
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* ---------------- Payment Details Section ---------------- */
.payment-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--card-shadow);
}

.payment-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
}

.bank-row {
  margin-bottom: 18px;
}

.bank-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.bank-val-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  font-family: ui-monospace, Menlo, Monaco, Consolas, monospace;
}

.copy-btn {
  background: rgba(56, 189, 248, 0.15);
  color: var(--text-accent);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-family);
  transition: all 150ms ease;
  min-height: 32px;
  cursor: pointer;
  flex-shrink: 0;
  white-space: nowrap;
}

.copy-btn:hover {
  background: var(--text-accent);
  color: #090d16;
}

/* Currency Switcher Tabs */
.currency-switcher-wrap {
  margin: 22px 0 14px 0;
}

.currency-switcher-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.currency-nav {
  display: inline-flex;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 4px;
  gap: 6px;
  width: 100%;
  max-width: 380px;
}

.currency-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-body);
  background: transparent;
  border: 1px solid transparent;
  transition: all 180ms ease;
  cursor: pointer;
  min-height: 42px;
}

.currency-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .currency-btn:hover {
  background: rgba(0, 0, 0, 0.04);
}

.currency-btn.active {
  background: var(--gradient-brand);
  color: #ffffff !important;
  box-shadow: 0 3px 12px rgba(139, 92, 246, 0.35);
  border-color: transparent;
}

.curr-symbol {
  font-size: 1rem;
  font-weight: 800;
}

.currency-panel {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px 18px 2px 18px;
  margin-bottom: 20px;
  animation: fadeIn 200ms ease;
}

.currency-panel .bank-row:last-child {
  margin-bottom: 16px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

.pay-ref-note {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.5;
  font-style: italic;
}

.payment-alert-box {
  background: var(--gradient-brand-subtle);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.payment-alert-box h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.payment-alert-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.payment-alert-box li {
  font-size: 0.95rem;
  color: var(--text-body);
  position: relative;
  padding-left: 20px;
}

.payment-alert-box li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--brand-purple);
  font-weight: bold;
}

/* ---------------- Form Sections ---------------- */
.form-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--card-shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.form-group.full {
  grid-column: span 2;
}

.form-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 150ms ease, box-shadow 150ms ease;
  min-height: 48px;
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--border-focus);
  outline: none;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);
}

.form-checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-body);
}

.form-checkbox {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--brand-purple);
  cursor: pointer;
}

.form-status {
  margin-top: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #10b981;
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #ef4444;
}

/* ---------------- Footer ---------------- */
.site-footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-subtle);
  padding: 50px 0 30px 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
}

.footer-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 28px 36px;
  max-width: 980px;
}

.footer-logo-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: transform 220ms ease;
}

.footer-logo-item:hover {
  transform: translateY(-3px);
}

.footer-logo-img {
  max-height: 38px;
  width: auto;
  object-fit: contain;
  transition: filter 260ms ease, opacity 260ms ease, transform 260ms ease;
  /* Uniform monochrome color in resting state */
  filter: brightness(0) invert(0.72);
  opacity: 0.7;
}

.footer-logo-img.logo-gainz {
  max-height: 38px;
}

.footer-logo-img.logo-ted {
  max-height: 36px;
}

.footer-logo-img.logo-adwent-circle {
  max-height: 36px;
  border-radius: 50%;
}

.footer-logo-img.logo-adwent2 {
  max-height: 38px;
}

.footer-logo-img.logo-onevoice {
  max-height: 34px;
}

/* Light mode uniform color in resting state */
[data-theme="light"] .footer-logo-img {
  filter: brightness(0) opacity(0.55);
}

/* Hover: Reveal original colors */
.footer-logo-item:hover .footer-logo-img {
  filter: none !important;
  opacity: 1 !important;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  list-style: none;
}

.footer-link {
  color: var(--text-body);
  font-size: 0.95rem;
  font-weight: 500;
}

.footer-link:hover {
  color: var(--text-accent);
}

.footer-copy {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ---------------- Modal ---------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease, visibility 200ms ease;
}

.modal-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  transform: scale(0.96);
  transition: transform 200ms ease;
}

.modal-backdrop.is-open .modal-dialog {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
}

.modal-close {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-body);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 28px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-surface);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-focus);
  box-shadow: var(--card-shadow-hover);
  font-size: 0.92rem;
  font-weight: 600;
  z-index: 3000;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 200ms ease, transform 200ms ease;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ---------------- Responsive Media Queries ---------------- */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-features-grid {
    grid-template-columns: 1fr;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

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

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

@media (max-width: 1024px) {
  .nav-menu {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--card-shadow-hover);
    display: none;
  }

  .nav-menu.is-open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }
}

@media (max-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-group.full {
    grid-column: span 1;
  }

  .schedule-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}