/* ===================================================
   TECHSTRONG LEARNING — REDESIGN
   Design: Instrument Serif + General Sans
   Palette: Teal / Gold / Navy (Techstrong System)
   =================================================== */

/* ---------- CUSTOM PROPERTIES ---------- */
:root {
  /* Typography */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'General Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Techstrong Colors — Light */
  --color-bg: #fafbfc;
  --color-surface: #ffffff;
  --color-surface-2: #f5f7f9;
  --color-border: #e2e5ea;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-faint: #94a3b8;

  /* Techstrong Brand */
  --color-teal: #0d9488;
  --color-teal-dark: #0f766e;
  --color-teal-light: #ccfbf1;
  --color-teal-subtle: #f0fdfa;
  --color-gold: #d4a012;
  --color-gold-light: #fef9c3;
  --color-navy: #0c1a2e;
  --color-navy-light: #1e293b;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 16px rgba(15,23,42,0.06);
  --shadow-lg: 0 12px 40px rgba(15,23,42,0.1);

  /* Content */
  --content-wide: 1200px;
  --content-default: 960px;

  /* Header height for scroll offset */
  --header-h: 64px;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--space-8));
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
}

img, picture, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
h1,h2,h3,h4,h5,h6 { line-height: 1.15; text-wrap: balance; }
p { text-wrap: pretty; max-width: 72ch; }

a, button, [role='button'], input, textarea, select {
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

::selection { background: rgba(13,148,136,0.2); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-teal); outline-offset: 3px; border-radius: var(--radius-sm); }

.container { max-width: var(--content-wide); margin: 0 auto; padding-inline: var(--space-6); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ========================================
   HEADER
   ======================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250,251,252,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
}
.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}
.logo { display: flex; align-items: center; flex-shrink: 0; }
.logo svg { height: 28px; width: auto; }

.nav-desktop { display: flex; gap: var(--space-8); }
.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-teal);
  transition: width var(--transition);
}
.nav-link:hover { color: var(--color-text); }
.nav-link:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: var(--space-4); }
.search-toggle { color: var(--color-text-muted); padding: var(--space-2); }
.search-toggle:hover { color: var(--color-teal); }
.mobile-menu-toggle { display: none; padding: var(--space-2); }

/* Search Overlay */
.search-overlay {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  display: none;
  opacity: 0;
  transform: translateY(-8px);
}
.search-overlay.active {
  display: block;
  animation: slideDown 250ms cubic-bezier(0.16,1,0.3,1) forwards;
}
@keyframes slideDown {
  to { opacity: 1; transform: translateY(0); }
}
.search-overlay-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.search-input {
  flex: 1;
  border: none;
  background: none;
  font-size: var(--text-lg);
  font-family: var(--font-body);
  font-weight: 300;
  outline: none;
  padding: var(--space-2) 0;
  color: var(--color-text);
}
.search-input::placeholder { color: var(--color-text-faint); }
.search-close { color: var(--color-text-muted); padding: var(--space-2); }
.search-close:hover { color: var(--color-text); }
.search-suggestions {
  max-width: var(--content-default);
  margin: var(--space-4) auto 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.search-suggestion-label { font-size: var(--text-xs); color: var(--color-text-faint); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.search-tag {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-weight: 500;
}
.search-tag:hover { border-color: var(--color-teal); color: var(--color-teal); background: var(--color-teal-subtle); }

/* Mobile Menu */
.mobile-menu { display: none; }
.mobile-menu.active {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}
.mobile-nav-link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--text-lg);
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav-link:last-child { border-bottom: none; }

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #0c1a2e url('hero-panel.jpg') center/cover no-repeat;
  padding: var(--space-16) var(--space-6);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,18,32,0.55) 0%, rgba(8,18,32,0.7) 50%, rgba(8,18,32,0.85) 100%);
  z-index: 1;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.15;
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #5eead4;
  background: rgba(94,234,212,0.1);
  border: 1px solid rgba(94,234,212,0.25);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-teal);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: #ffffff;
  margin-bottom: var(--space-6);
}
.hero-accent {
  background: linear-gradient(135deg, #5eead4, #2dd4bf);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-style: italic;
}
.hero-subtitle {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto var(--space-10);
  font-weight: 400;
}
.hero-search {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  max-width: 500px;
  margin: 0 auto var(--space-12);
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
  backdrop-filter: blur(12px);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.hero-search:focus-within {
  border-color: rgba(94,234,212,0.5);
  box-shadow: 0 2px 24px rgba(94,234,212,0.12);
  background: rgba(255,255,255,0.15);
}
.hero-search-icon { color: rgba(255,255,255,0.5); flex-shrink: 0; }
.hero-search-input {
  flex: 1;
  border: none;
  background: none;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: #ffffff;
  outline: none;
  font-weight: 400;
}
.hero-search-input::placeholder { color: rgba(255,255,255,0.45); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  max-width: 700px;
  margin: 0 auto;
}
.hero-stat { text-align: center; }
.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
  color: #ffffff;
  display: inline;
}
.stat-plus {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
  color: #5eead4;
}
.stat-label {
  display: block;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.55);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* ========================================
   FEATURED EVENTS
   ======================================== */
.featured {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
}
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
}
.section-title--light { color: #ffffff; }
.section-desc { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-2); }
.section-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-teal);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.section-link:hover { color: var(--color-teal-dark); }
.section-link--light { color: rgba(255,255,255,0.6); }
.section-link--light:hover { color: #ffffff; }

.featured-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: var(--space-6);
}
.featured-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: block;
  position: relative;
}
.featured-card--large {
  grid-row: 1 / 3;
}
.featured-card-image {
  width: 100%;
  height: 100%;
  min-height: 220px;
  background: linear-gradient(135deg, #0c1a2e, #0f3d4a);
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: flex-end;
}
.featured-card--large .featured-card-image {
  min-height: 460px;
  background-size: contain;
  background-position: top center;
  background-repeat: no-repeat;
  background-color: #1a2d42;
}
.featured-card-image--security { background: linear-gradient(135deg, #1e293b, #0f4a3d); }
.featured-card-image--devops { background: linear-gradient(135deg, #1e293b, #2a1a4a); }
.featured-card-image--ai { background: linear-gradient(135deg, #1e293b, #4a2a1a); }
.featured-card-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(12,26,46,0.95) 100%);
}
.featured-card-overlay {
  position: relative;
  z-index: 2;
  padding: var(--space-6);
}
.card-badge {
  display: inline-block;
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 3;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  color: #ffffff;
}
.card-badge--live { background: var(--color-teal); }
.card-topic {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-teal);
  margin-bottom: var(--space-2);
  display: block;
}
.card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: #ffffff;
  line-height: 1.3;
}
.card-title--sm { font-size: var(--text-base); }
.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
}
.card-date { font-size: var(--text-xs); color: rgba(255,255,255,0.5); margin-top: var(--space-2); display: block; }
.meta-dot { width: 3px; height: 3px; border-radius: 50%; background: rgba(255,255,255,0.3); }

.featured-card:hover .featured-card-image { transform: scale(1.02); }
.featured-card .featured-card-image { transition: transform 400ms cubic-bezier(0.16,1,0.3,1); }

/* ========================================
   CATEGORIES
   ======================================== */
.categories {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
  background: var(--color-surface-2);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  position: relative;
}
.category-card:hover {
  border-color: var(--color-teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.category-icon--ai { background: #ede9fe; color: #7c3aed; }
.category-icon--security { background: #fce7f3; color: #db2777; }
.category-icon--devops { background: #dbeafe; color: #2563eb; }
.category-icon--cloud { background: var(--color-teal-light); color: var(--color-teal-dark); }
.category-icon--platform { background: #fef3c7; color: #d97706; }
.category-icon--observability { background: #e0e7ff; color: #4f46e5; }
.category-icon--dt { background: #fce7f3; color: #9333ea; }
.category-icon--privacy { background: #fee2e2; color: #dc2626; }

.category-name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.category-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.category-arrow {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  color: var(--color-text-faint);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--transition), transform var(--transition);
}
.category-card:hover .category-arrow { opacity: 1; transform: translateX(0); }

/* All Topics Pills */
.all-topics {
  margin-top: var(--space-10);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.all-topics-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  padding-top: var(--space-2);
  flex-shrink: 0;
}
.topic-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.topic-pill {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: var(--color-surface);
}
.topic-pill:hover { border-color: var(--color-teal); color: var(--color-teal); background: var(--color-teal-subtle); }

/* ========================================
   LIBRARY
   ======================================== */
.library {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
}

/* Filter Bar */
.filter-bar {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}
.filter-btn {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: var(--color-surface);
}
.filter-btn:hover { border-color: var(--color-teal); color: var(--color-teal); }
.filter-btn--active {
  background: var(--color-teal);
  border-color: var(--color-teal);
  color: #ffffff;
}
.filter-btn--active:hover { background: var(--color-teal-dark); border-color: var(--color-teal-dark); color: #ffffff; }

/* Webinar Grid */
.webinar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.webinar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  overflow: hidden;
}
.webinar-thumb {
  width: 100%;
  aspect-ratio: 1540 / 660;
  overflow: hidden;
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
  flex-shrink: 0;
}
.webinar-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 400ms cubic-bezier(0.16,1,0.3,1);
}
.webinar-card:hover .webinar-thumb img {
  transform: scale(1.04);
}
.webinar-thumb--placeholder {
  background: linear-gradient(135deg, #e8f4f5, #dce8f0, #e2e0f0);
  display: flex;
  align-items: center;
  justify-content: center;
}
.thumb-placeholder-inner {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(13,148,136,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}
.thumb-placeholder-inner::after {
  content: '\25B6';
  color: rgba(13,148,136,0.4);
  font-size: 18px;
  margin-left: 2px;
}
.webinar-card:hover {
  border-color: var(--color-teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.webinar-card.hidden { display: none; }
.webinar-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-5) 0;
}
.webinar-topic {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}
.webinar-topic--ai { background: #ede9fe; color: #7c3aed; }
.webinar-topic--security { background: #fce7f3; color: #db2777; }
.webinar-topic--devops { background: #dbeafe; color: #2563eb; }
.webinar-topic--cloud { background: var(--color-teal-light); color: var(--color-teal-dark); }
.webinar-topic--platform { background: #fef3c7; color: #d97706; }
.webinar-topic--observability { background: #e0e7ff; color: #4f46e5; }
.webinar-topic--compliance { background: #fff7ed; color: #c2410c; }
.webinar-topic--appsec { background: #f3e8ff; color: #9333ea; }
.webinar-status {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-faint);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.webinar-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
}
.webinar-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  padding: 0 var(--space-5);
}
.webinar-excerpt {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
  padding: 0 var(--space-5);
}
.webinar-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  margin: auto var(--space-5) var(--space-5);
}
.webinar-date {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.webinar-cta {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-teal);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.webinar-card:hover .webinar-cta { color: var(--color-teal-dark); }

/* Load More */
.load-more-wrap {
  text-align: center;
  margin-top: var(--space-10);
}
.btn-load-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-teal);
  padding: var(--space-4) var(--space-8);
  border: 2px solid var(--color-teal);
  border-radius: var(--radius-full);
}
.btn-load-more:hover { background: var(--color-teal); color: #ffffff; }

/* ========================================
   UPCOMING EVENTS
   ======================================== */
.upcoming {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
  background: var(--color-navy);
}
.section-desc--light { color: rgba(255,255,255,0.55); }
.upcoming-month {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: rgba(255,255,255,0.4);
  font-weight: 400;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.upcoming-month:not(:first-of-type) {
  margin-top: var(--space-10);
}
.upcoming-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.upcoming-card {
  padding: 0;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}
.upcoming-card:hover { border-color: var(--color-teal); background: rgba(13,148,136,0.08); }
.upcoming-thumb {
  width: 100%;
  aspect-ratio: 1540 / 660;
  overflow: hidden;
  flex-shrink: 0;
}
.upcoming-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 400ms cubic-bezier(0.16,1,0.3,1);
}
.upcoming-card:hover .upcoming-thumb img {
  transform: scale(1.04);
}
.upcoming-date {
  font-size: 11px;
  font-weight: 600;
  color: #5eead4;
  letter-spacing: 0.03em;
  padding: var(--space-4) var(--space-4) 0;
}
.upcoming-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: #ffffff;
  font-weight: 600;
  line-height: 1.35;
  padding: var(--space-1) var(--space-4) 0;
}
.upcoming-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding: var(--space-3) var(--space-4) var(--space-4);
}
.upcoming-sponsor {
  font-size: 11px;
  font-weight: 500;
  color: rgba(255,255,255,0.5);
}
.upcoming-source {
  font-size: 10px;
  font-weight: 600;
  color: rgba(94,234,212,0.5);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ========================================
   ABOUT / NETWORK
   ======================================== */
.about {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
  background: var(--color-surface-2);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}
.about-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-6);
  line-height: 1.7;
}
.network-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.network-card {
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-align: center;
}
.network-card:hover { border-color: var(--color-teal); color: var(--color-teal); }

/* ========================================
   SPONSOR OFFERINGS
   ======================================== */
.sponsor {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-bg);
}
.sponsor-header {
  margin-bottom: var(--space-16);
}
.sponsor-header-text {
  max-width: 700px;
  margin-bottom: var(--space-10);
}
.sponsor-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  background: var(--color-gold-light);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}
.sponsor-badge svg { stroke: var(--color-gold); }
.sponsor-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-top: var(--space-6);
}

/* Sponsor Stats Strip */
.sponsor-stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  padding: var(--space-8);
  background: var(--color-navy);
  border-radius: var(--radius-xl);
}
.sponsor-stat { text-align: center; }
.sponsor-stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #ffffff;
  display: block;
}
.sponsor-stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
  display: block;
}

/* Choose Your Format Subhead */
.sponsor-subhead {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  margin-bottom: var(--space-8);
}

/* Offering Grid */
.offering-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-16);
}
.offering-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.offering-card:hover {
  border-color: var(--color-teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.offering-card--featured {
  border-color: var(--color-teal);
  background: linear-gradient(180deg, var(--color-teal-subtle) 0%, var(--color-surface) 40%);
}
.offering-featured-badge {
  position: absolute;
  top: calc(var(--space-4) * -1);
  right: var(--space-6);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-4);
  background: var(--color-teal);
  color: #ffffff;
  border-radius: var(--radius-full);
}
.offering-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.offering-icon--webinar { background: #dbeafe; color: #2563eb; }
.offering-icon--lightning { background: #fef3c7; color: #d97706; }
.offering-icon--twostep { background: #ede9fe; color: #7c3aed; }
.offering-icon--summit { background: var(--color-teal-light); color: var(--color-teal-dark); }
.offering-icon--roundtable { background: #fce7f3; color: #db2777; }
.offering-icon--intent { background: #e0e7ff; color: #4f46e5; }
.offering-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
}
.offering-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.offering-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.offering-features li {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding-left: var(--space-6);
  position: relative;
}
.offering-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--color-teal);
  mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") no-repeat center;
}

/* A Team, Not a Tool */
.team-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
  margin-bottom: var(--space-16);
  padding: var(--space-10);
  background: var(--color-surface-2);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}
.team-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  margin-bottom: var(--space-4);
}
.team-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}
.team-points {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.team-point {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}
.team-point svg { flex-shrink: 0; }

/* Comparison Columns */
.team-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.comparison-col {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
}
.comparison-col--diy {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}
.comparison-col--ts {
  background: var(--color-navy);
  color: #ffffff;
}
.comparison-heading {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.comparison-col--diy .comparison-heading {
  color: var(--color-text-muted);
  border-bottom-color: var(--color-border);
}
.comparison-col--ts .comparison-heading {
  color: var(--color-teal);
}
.comparison-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  padding: var(--space-2) 0;
}
.comparison-item--no { color: var(--color-text-faint); }
.comparison-item--no svg { stroke: #ef4444; }
.comparison-item--yes { color: rgba(255,255,255,0.85); }
.comparison-item--yes svg { stroke: var(--color-teal); }

/* Sponsor Inquiry CTA */
.sponsor-inquiry {
  background: linear-gradient(135deg, var(--color-navy) 0%, #0f3d4a 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-10);
  text-align: center;
}
.inquiry-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #ffffff;
  margin-bottom: var(--space-3);
}
.inquiry-desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.6);
  max-width: 500px;
  margin: 0 auto var(--space-8);
  font-weight: 300;
}
.inquiry-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}
.inquiry-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  letter-spacing: 0.01em;
}
.inquiry-btn--primary {
  background: linear-gradient(135deg, var(--color-gold), #eab308);
  color: var(--color-navy);
}
.inquiry-btn--primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(212,160,18,0.3); }
.inquiry-btn--secondary {
  border: 1px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.8);
}
.inquiry-btn--secondary:hover { border-color: rgba(255,255,255,0.5); color: #ffffff; }
.inquiry-note {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}
.inquiry-note a { color: rgba(255,255,255,0.5); text-decoration: underline; }
.inquiry-note a:hover { color: #ffffff; }

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
  background: linear-gradient(135deg, var(--color-navy) 0%, #0f3d4a 100%);
}
.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}
.cta-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #ffffff;
  margin-bottom: var(--space-4);
}
.cta-desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.6);
  margin: 0 auto var(--space-8);
  font-weight: 300;
}
.cta-button {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-4) var(--space-8);
  background: linear-gradient(135deg, var(--color-gold), #eab308);
  color: var(--color-navy);
  border-radius: var(--radius-full);
  letter-spacing: 0.01em;
}
.cta-button:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(212,160,18,0.3); }

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  background: var(--color-navy);
  color: rgba(255,255,255,0.6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { max-width: 280px; }
.footer-tagline { font-size: var(--text-xs); margin-top: var(--space-4); line-height: 1.6; }
.footer-heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-4);
}
.footer-links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-links a { font-size: var(--text-xs); color: rgba(255,255,255,0.6); }
.footer-links a:hover { color: #ffffff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
}
.footer-social { display: flex; gap: var(--space-5); }
.footer-social a { color: rgba(255,255,255,0.4); }
.footer-social a:hover { color: #ffffff; }

/* ========================================
   SCROLL REVEAL
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms cubic-bezier(0.16,1,0.3,1), transform 600ms cubic-bezier(0.16,1,0.3,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .featured-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .featured-card--large { grid-row: auto; }
  .featured-card--large .featured-card-image { min-height: 300px; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .webinar-grid { grid-template-columns: repeat(2, 1fr); }
  .upcoming-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .mobile-menu-toggle { display: block; }
  .hero { min-height: 70vh; padding: var(--space-12) var(--space-4); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
  .featured-grid { grid-template-columns: 1fr; }
  .featured-card--large .featured-card-image { min-height: 260px; }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .webinar-grid { grid-template-columns: 1fr; }
  .upcoming-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .filter-bar { gap: var(--space-2); }
}

@media (max-width: 480px) {
  .category-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}