/* ==========================================================================
   NANOBRIDGE YT 2026 - DESIGN SYSTEM & STYLESHEET
   Aesthetic inspired by MIT Critical Data (MAKE HEALTH) & IEEE Nanotechnology Council
   Palette: Deep Teal, Warm Cream, Pastel Apricot, Soft Sage, Amber & Terracotta
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* ========================================================================
     NANOBRIDGE YT 2026 - UNIQUE IDENTITY: QUANTUM PLASMA & TITANIUM OBSIDIAN
     Distinctive Palette: Deep Midnight Cobalt, Quantum Electric Cyan, Titanium White & Crisp Slate
     ======================================================================== */
  --color-teal-dark: #070b14;       /* Deep Cosmic Space / Vacuum Obsidian */
  --color-teal-mid: #0a1322;        /* Midnight Space Navy */
  --color-teal-deep: #03060c;       /* Deepest obsidian black */
  
  --color-cream: #ffffff;           /* Clean pure white background */
  --color-cream-light: #f8fafc;     /* Subtle ice-slate background for alternate sections */
  --color-cream-card: #ffffff;      /* Pure white cards */
  
  --color-apricot: #cbd5e1;         /* Titanium silver text & accents */
  --color-apricot-light: #f1f5f9;   /* Neutral soft pills */
  
  --color-amber: #0284c7;           /* IEEE Master Technology Blue */
  --color-amber-hover: #0369a1;     /* Hover blue */
  
  --color-plasma-cyan: #38bdf8;     /* Luminous Argon Plasma Cyan (Signature Glow) */
  --color-plasma-violet: #818cf8;   /* Electric Quantum Violet */
  
  --color-sage: #94a3b8;            /* Slate light grey */
  --color-sage-light: #ffffff;      /* Pure white */
  --color-sage-dark: #64748b;       /* Subtle text */
  --color-sage-muted: #64748b;      /* Slate body text */
  
  --color-rust: #0284c7;            /* Blue accent */
  --color-rust-light: #eff6ff;      /* Subtle blue tint */
  --color-white: #ffffff;
  --color-black: #03060c;

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing & Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 14px;
  --radius-2xl: 18px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.09);
  --shadow-glow: 0 0 40px rgba(2, 132, 199, 0.2);

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.45s cubic-bezier(0.16, 1, 0.3, 1);

  /* Pointer tracking vars */
  --pointer-x: 50vw;
  --pointer-y: 50vh;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: #ffffff;
  color: #1e293b;
  line-height: 1.65;
  font-weight: 400;
  overflow-x: hidden;
  position: relative;
}

::selection {
  background: rgba(2, 132, 199, 0.15);
  color: #0f172a;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ==========================================================================
   CANVAS & AMBIENT INTERACTIVE MESH
   ========================================================================== */
#mesh-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 40;
  opacity: 0.65;
  transition: opacity var(--transition-normal);
}

.ambient-aura {
  position: fixed;
  top: var(--pointer-y);
  left: var(--pointer-x);
  width: 500px;
  height: 500px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(2, 132, 199, 0.04) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
  border-radius: 50%;
  filter: blur(50px);
  transition: opacity var(--transition-normal);
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1340px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 4vw, 3rem);
  padding-right: clamp(1.25rem, 4vw, 3rem);
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   HEADER & TOP NOTIFICATION BAR
   ========================================================================== */
.top-notice-bar {
  background-color: var(--color-teal-dark);
  color: var(--color-cream);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 8px 0;
  position: relative;
  z-index: 60;
}

.notice-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.notice-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.notice-dot {
  width: 7px;
  height: 7px;
  background-color: var(--color-plasma-cyan);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 10px var(--color-plasma-cyan);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.main-header {
  position: sticky;
  top: 0;
  background-color: rgba(7, 11, 20, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
  z-index: 50;
  color: #ffffff;
  transition: all var(--transition-normal);
}

.nav-wrapper,
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 78px;
  flex-wrap: nowrap;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-logo-badge {
  background: #ffffff;
  padding: 6px 14px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.95);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

.brand-badge:hover .brand-logo-badge {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.38);
}

.brand-logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
}

.brand-text-block {
  display: flex;
  flex-direction: column;
}

.brand-tag {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-cream);
  line-height: 1.1;
}

.brand-sub {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-sage-dark);
  font-weight: 600;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: clamp(8px, 1.3vw, 20px);
  flex-wrap: nowrap;
  white-space: nowrap;
}

.nav-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-sage);
  letter-spacing: 0.04em;
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--color-cream);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.6);
  transition: width var(--transition-normal);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Language Switcher */
.lang-toggle {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-pill);
  padding: 3px;
}

.lang-btn {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-sage);
  transition: all var(--transition-fast);
}

.lang-btn.active {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.4);
}

/* Action Button */
.btn-header-cta {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
}

.btn-header-cta:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.5);
}

.mobile-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  padding: 4px;
}

.mobile-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-cream);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

/* Mobile Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 118px;
  left: 0;
  width: 100%;
  background: var(--color-teal-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform: translateY(-120%);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 45;
}

.mobile-nav-drawer.open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav-drawer .nav-link {
  font-size: 16px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   HERO SECTION (QUANTUM PLASMA & TITANIUM OBSIDIAN)
   Deep Cosmic Navy with Luminous Argon Plasma Cyan & Quantum Cobalt Glow
   ========================================================================== */
.hero-section {
  position: relative;
  background-color: #070d18;
  background-image: 
    radial-gradient(at 80% 20%, rgba(14, 165, 233, 0.16) 0px, transparent 55%),
    radial-gradient(at 20% 80%, rgba(79, 70, 229, 0.12) 0px, transparent 55%);
  color: #ffffff;
  overflow: hidden;
  padding: clamp(2rem, 3.5vw, 3.2rem) 0 clamp(2.5rem, 4vw, 3.6rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-background-aura {
  position: absolute;
  inset: -25%;
  background: radial-gradient(ellipse at 75% 25%, rgba(14, 165, 233, 0.15) 0%, transparent 60%);
  opacity: 0.7;
  filter: blur(80px);
  pointer-events: none;
}

.hero-orbit-ring-1 {
  position: absolute;
  top: 60px;
  right: -100px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  border: 1px dashed rgba(56, 189, 248, 0.22);
  pointer-events: none;
  animation: orbit-spin 60s linear infinite;
}

.hero-orbit-ring-2 {
  position: absolute;
  bottom: -120px;
  left: -80px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  border: 1px solid rgba(129, 140, 248, 0.2);
  pointer-events: none;
  animation: orbit-spin-rev 80s linear infinite;
}

@keyframes orbit-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes orbit-spin-rev {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(310px, 0.85fr);
  gap: clamp(1.5rem, 3.5vw, 3rem);
  align-items: center;
}

.hero-eyebrow-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #38bdf8;
  margin-bottom: 12px;
}

.eyebrow-pill {
  width: 7px;
  height: 7px;
  background-color: #38bdf8;
  border-radius: 50%;
  box-shadow: 0 0 10px #38bdf8;
}

.hero-main-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 3.8vw, 3.4rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: #ffffff;
  margin-bottom: 12px;
}

.hero-main-title .highlight-accent {
  display: block;
  font-size: clamp(1.15rem, 1.85vw, 1.55rem);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.02em;
  margin-top: 8px;
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-family: var(--font-heading);
  font-size: clamp(0.95rem, 1.2vw, 1.12rem);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.015em;
  color: #cbd5e1;
  margin-bottom: 22px;
}

.hero-description {
  font-size: clamp(0.86rem, 1.02vw, 0.95rem);
  line-height: 1.55;
  color: #94a3b8;
  max-width: 580px;
  margin-bottom: 22px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-primary-pill {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 13.5px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.4);
}

.btn-primary-pill:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.6);
}

.btn-outline-pill {
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  color: var(--color-cream);
  font-weight: 600;
  font-size: 13.5px;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-normal);
}

.btn-outline-pill:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-cream);
  transform: translateY(-2px);
}

/* Hero Right Sidebar: Event Pillars & Countdown */
.hero-meta-panel {
  background: rgba(10, 19, 34, 0.88);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.meta-box {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
}

.meta-box:last-child {
  border-bottom: none;
}

.meta-label {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #38bdf8;
  margin-bottom: 4px;
}

.meta-value {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.25;
}

.meta-subtext {
  font-size: 11.5px;
  color: #94a3b8;
  margin-top: 3px;
}

/* Countdown Block inside Hero */
.countdown-block {
  padding: 18px 20px;
  background: rgba(7, 13, 24, 0.85);
  border-top: 1px solid rgba(56, 189, 248, 0.15);
}

.countdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.countdown-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #38bdf8;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.countdown-unit-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: var(--radius-md);
  padding: 8px 4px;
  text-align: center;
  box-shadow: inset 0 0 12px rgba(56, 189, 248, 0.05);
}

.countdown-number {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
  display: block;
  margin-bottom: 2px;
}

.countdown-label {
  font-size: 8.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #94a3b8;
}

/* ==========================================================================
   SECTION COMMON LAYOUT & TYPOGRAPHY
   ========================================================================== */
.section {
  padding: clamp(4.5rem, 9vw, 8rem) 0;
  position: relative;
  overflow: hidden;
}

.section-cream,
.section-white {
  background-color: #ffffff;
  color: #1e293b;
}

.section-sage,
.section-subtle,
.section-apricot {
  background-color: #f8fafc;
  color: #1e293b;
  border-top: 1px solid #f1f5f9;
  border-bottom: 1px solid #f1f5f9;
}

.section-teal-dark {
  background-color: #070b14;
  background-image: 
    radial-gradient(at 15% 25%, rgba(14, 165, 233, 0.07) 0px, transparent 50%),
    radial-gradient(at 85% 75%, rgba(99, 102, 241, 0.07) 0px, transparent 50%);
  color: #f8fafc;
}

.section-header-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: #0284c7;
}

.section-eyebrow.eyebrow-rust,
.section-eyebrow.eyebrow-amber {
  color: #0284c7;
}

.section-teal-dark .section-eyebrow {
  color: #38bdf8;
}

.eyebrow-line {
  width: 28px;
  height: 2px;
  background-color: #0284c7;
}

.section-teal-dark .eyebrow-line {
  background-color: #38bdf8;
}

.section-title-large {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4.2vw, 3.8rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: #0f172a;
}

.section-teal-dark .section-title-large {
  color: #ffffff;
}

.section-lead-text {
  font-size: clamp(1rem, 1.2vw, 1.15rem);
  line-height: 1.7;
  color: #64748b;
}

.section-teal-dark .section-lead-text {
  color: #94a3b8;
}

/* ==========================================================================
   ABOUT & PILLARS SECTION (ROUNDED CARDS WITH 01, 02, 03)
   ========================================================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.pillar-card {
  background-color: #ffffff;
  color: #0f172a;
  border-radius: var(--radius-xl);
  padding: clamp(1.8rem, 3.5vw, 2.5rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 340px;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.07);
  border-color: #cbd5e1;
}

/* Eliminate rainbow overrides - all cards uniform white */
.pillar-card.card-teal,
.pillar-card.card-cream,
.pillar-card.card-sage,
.pillar-card.card-rust {
  background-color: #ffffff;
  color: #0f172a;
  border-color: #e2e8f0;
}

.pillar-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.pillar-index {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #0284c7;
}

.card-teal .pillar-index,
.card-cream .pillar-index,
.card-sage .pillar-index,
.card-rust .pillar-index {
  color: #0284c7;
}

.pillar-category {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #64748b;
}

.pillar-card-title {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 1.8vw, 1.65rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: #0f172a;
  margin-bottom: 14px;
}

.pillar-card-desc {
  font-size: 14px;
  line-height: 1.65;
  color: #64748b;
}

.pillar-card-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid #f1f5f9;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #0284c7;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-teal .pillar-card-footer {
  border-top-color: #f1f5f9;
  color: #0284c7;
}

/* ==========================================================================
   SPEAKERS SECTION: UNIFORM GRID WITH ROUNDED PHOTO FRAMES
   User request: Cuadrícula uniforme donde todos los ponentes tengan el mismo
   tamaño de tarjeta y diseño, con marcos de fotos listos (vacíos por ahora).
   ========================================================================== */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 28px;
}

.speaker-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-xl);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.speaker-card:hover {
  transform: translateY(-4px);
  background-color: #ffffff;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.07);
  border-color: #cbd5e1;
}

.speaker-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 22px;
}

.speaker-index-tag {
  font-family: var(--font-heading);
  font-size: 10.5px;
  font-weight: 700;
  color: #0284c7;
  background: #eff6ff;
  border: 1px solid #dbeafe;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.speaker-modality-badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
}

.badge-in-person {
  background-color: #f1f5f9;
  color: #475569;
  border: 1px solid #e2e8f0;
}

.badge-virtual {
  background-color: #f8fafc;
  color: #64748b;
  border: 1px solid #e2e8f0;
}

/* Speaker Photo Frame (Ready for images, elegant placeholder state) */
.speaker-photo-frame-wrapper {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 20px;
}

.speaker-avatar-frame {
  width: 76px;
  height: 76px;
  border-radius: 12px;
  background-color: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border: 1px solid #e2e8f0;
  flex-shrink: 0;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.speaker-card:hover .speaker-avatar-frame {
  border-color: #0284c7;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.15);
}

.speaker-initials {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.speaker-photo-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 12px;
  z-index: 2;
}

.speaker-avatar-meta {
  display: flex;
  flex-direction: column;
}

.speaker-role-pill {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #0284c7;
  margin-bottom: 4px;
}

.speaker-affiliation-sub {
  font-size: 12px;
  font-weight: 600;
  color: #64748b;
  line-height: 1.35;
}

.speaker-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: #0f172a;
  margin-bottom: 12px;
}

.speaker-bio {
  font-size: 13.5px;
  line-height: 1.6;
  color: #64748b;
  margin-bottom: 20px;
}

/* Talks list in speaker card */
.speaker-talks-container {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 20px;
}

.speaker-talk-item {
  margin-bottom: 12px;
}

.speaker-talk-item:last-child {
  margin-bottom: 0;
}

.speaker-talk-day-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #0284c7;
  display: block;
  margin-bottom: 3px;
}

.speaker-talk-title {
  font-family: var(--font-heading);
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.35;
  color: #0f172a;
}

.speaker-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid #f1f5f9;
}

.btn-speaker-abstract {
  font-size: 12px;
  font-weight: 600;
  color: #0284c7;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.btn-speaker-abstract:hover {
  color: #0369a1;
}

.speaker-scholar-link {
  font-size: 11px;
  font-weight: 700;
  color: #64748b;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}

.speaker-scholar-link:hover {
  color: #0284c7;
}

/* ==========================================================================
   SCHEDULE SECTION (INTERACTIVE TABS FOR DAY 1 & DAY 2)
   Day 1: 10:00 Local -> 11:00 Danza -> 11:30 José Miguel -> Simon Heilles etc.
   Day 2: 10:00 José Miguel -> 11:30 Pianista -> 12:00 Virtual -> Simon Heilles etc.
   ========================================================================== */
.schedule-nav-tabs {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 28px;
  background: #f1f5f9;
  padding: 3px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

.schedule-tab-btn {
  padding: 7px 18px;
  border-radius: 6px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #64748b;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
}

.schedule-tab-btn:hover {
  color: #0f172a;
}

.schedule-tab-btn.active {
  background-color: #ffffff;
  color: #0f172a;
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.schedule-tab-date {
  font-size: 11px;
  font-weight: 500;
  color: #94a3b8;
}

.schedule-tab-btn.active .schedule-tab-date {
  color: #64748b;
}

.schedule-content-panel {
  display: none;
}

.schedule-content-panel.active {
  display: block;
}

.timeline-flow {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.timeline-entry {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 18px 22px;
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.timeline-entry:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);
}

.timeline-entry.entry-cultural,
.timeline-entry.entry-break,
.timeline-entry.entry-keynote {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
}

.timeline-time-col {
  display: flex;
  flex-direction: column;
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: #0f172a;
  letter-spacing: -0.01em;
}

.timeline-duration {
  font-size: 11px;
  font-weight: 500;
  color: #64748b;
  letter-spacing: 0.02em;
  margin-top: 2px;
}

.timeline-info-col {
  display: flex;
  flex-direction: column;
}

.timeline-badge-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
  flex-wrap: wrap;
}

/* Unified clean monochromatic tags - No rainbow buttons */
.timeline-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 4px;
  background-color: #f1f5f9;
  color: #475569;
  border: 1px solid #e2e8f0;
}

.tag-plenary {
  background-color: #eff6ff;
  color: #0284c7;
  border: 1px solid #dbeafe;
}

.tag-cultural,
.tag-invited,
.tag-break,
.tag-workshop,
.tag-live {
  background-color: #f1f5f9;
  color: #475569;
  border: 1px solid #e2e8f0;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #0f172a;
  line-height: 1.35;
  margin-bottom: 2px;
}

.timeline-speaker-sub {
  font-size: 13px;
  color: #64748b;
  font-weight: 400;
}

.timeline-action-col {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Minimal outline button - no cartoon capsule */
.btn-toggle-abstract {
  background: #ffffff;
  border: 1px solid #d1d5db;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: #1e293b;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-toggle-abstract:hover {
  background-color: #f8fafc;
  border-color: #94a3b8;
  color: #0f172a;
}

.timeline-expandable-abstract {
  grid-column: 1 / -1;
  background: #f8fafc;
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.65;
  color: #334155;
  margin-top: 8px;
  display: none;
  border: 1px solid #e2e8f0;
}

.timeline-expandable-abstract.expanded {
  display: block;
}

/* ==========================================================================
   FINANCIAL LODGING COMPARISON TABLE (URCUQUÍ / YACHAY TECH)
   Full financial analysis of Kampak Wasi, Strega, and Sueños de Primavera
   ========================================================================== */
.table-responsive-wrapper {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  margin-bottom: 32px;
}

.lodging-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.lodging-table th {
  background-color: #0f172a;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 18px 20px;
  border-bottom: 1px solid #1e293b;
}

.lodging-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #f1f5f9;
  color: #334155;
}

.lodging-table tbody tr:hover {
  background-color: #f8fafc;
}

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

.lodging-table .hotel-name-cell {
  font-weight: 700;
  font-size: 15px;
  color: #0f172a;
}

.lodging-table .price-cell {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #0f172a;
}

.lodging-table .lodging-info-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  color: #0369a1;
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  padding: 4px 10px;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lodging-table .lodging-info-badge:hover {
  background: #e0f2fe;
  border-color: #38bdf8;
  color: #0284c7;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.18);
}

.lodging-contact-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  color: #15803d;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  padding: 3px 8px;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lodging-table .price-ieee {
  color: #0284c7 !important;
  font-weight: 800;
  background-color: rgba(2, 132, 199, 0.04);
}

.lodging-opt-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 9999px;
  font-family: var(--font-heading);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.lodging-opt-badge.badge-duo {
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
}

.lodging-opt-badge.badge-k {
  background: #eff6ff;
  color: #0284c7;
  border: 1px solid #bae6fd;
}

.lodging-opt-badge.badge-s {
  background: #fdf4ff;
  color: #a21caf;
  border: 1px solid #f5d0fe;
}

.lodging-opt-badge.badge-vip {
  background: #fffbeb;
  color: #b45309;
  border: 1px solid #fde68a;
}

/* Reference Packages Cards Grid */
.packages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.package-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  transition: all var(--transition-normal);
}

.package-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  border-color: #cbd5e1;
}

.package-tier-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #0284c7;
  margin-bottom: 6px;
}

.package-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 14px;
}

.package-price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 12px;
}

.package-cost {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 800;
  color: #0f172a;
}

.package-unit {
  font-size: 12px;
  color: #64748b;
}

.package-notes {
  font-size: 12.5px;
  color: #64748b;
  line-height: 1.5;
  border-top: 1px solid #f1f5f9;
  padding-top: 12px;
  margin-top: 12px;
}

/* Detailed Room Accordion */
.room-accordion-wrapper {
  margin-top: 24px;
}

.room-accordion-toggle {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: #0f172a;
  transition: background var(--transition-fast);
}

.room-accordion-toggle:hover {
  background: #f8fafc;
}

.room-accordion-content {
  display: none;
  padding: 20px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.room-accordion-content.expanded {
  display: block;
}

/* ==========================================================================
   VENUE SECTION: YACHAY TECH UNIVERSITY
   Clean focus on Campus Yachay Tech (auditorium, research complex)
   ========================================================================== */
.venue-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
}

.venue-card-visual {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  position: relative;
}

.venue-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.venue-card-visual:hover .venue-img {
  transform: scale(1.03);
}

.venue-info-card {
  background: rgba(10, 19, 34, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: var(--radius-xl);
  padding: 32px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.venue-info-item {
  margin-bottom: 20px;
}

.venue-info-item:last-child {
  margin-bottom: 0;
}

.venue-info-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #38bdf8;
  margin-bottom: 4px;
}

.venue-info-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.venue-info-desc {
  font-size: 13px;
  color: #94a3b8;
  line-height: 1.6;
}

/* Venue Interactive Map Container */
.venue-map-container {
  background: rgba(10, 19, 34, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-2xl);
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  margin-top: 40px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.venue-map-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 22px;
}

.venue-map-title {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.venue-map-sub {
  font-size: 13px;
  color: #94a3b8;
  margin-top: 4px;
}

.btn-gmaps-link {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 13px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
  white-space: nowrap;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.btn-gmaps-link:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.45);
}

.venue-map-frame-wrapper {
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(56, 189, 248, 0.22);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

/* ==========================================================================
   REGISTRATION CTA & CERTIFICATION SECTION
   ========================================================================== */
.registration-box {
  background: linear-gradient(135deg, #0a1322 0%, #070b14 100%);
  border-radius: var(--radius-2xl);
  padding: clamp(2.5rem, 6vw, 4.5rem);
  color: #ffffff;
  border: 1px solid rgba(56, 189, 248, 0.22);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5);
}

.reg-aura-glow {
  position: absolute;
  top: -50px;
  right: -50px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.2) 0%, rgba(99, 102, 241, 0.12) 50%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  filter: blur(40px);
}

.reg-content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 36px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.reg-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: 16px;
  color: #ffffff;
}

.reg-desc {
  font-size: 15px;
  line-height: 1.7;
  color: #94a3b8;
  max-width: 580px;
  margin-bottom: 24px;
}

.reg-perks-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.reg-perk-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: #cbd5e1;
}

.reg-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.btn-reg-main {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 800;
  padding: 18px 32px;
  border-radius: var(--radius-pill);
  text-align: center;
  transition: all var(--transition-normal);
  box-shadow: 0 6px 22px rgba(2, 132, 199, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.btn-reg-main:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.5);
}

.btn-reg-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #7dd3fc;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  padding: 16px 28px;
  border-radius: var(--radius-pill);
  text-align: center;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  text-decoration: none;
}

.btn-reg-secondary:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: #38bdf8;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.25);
}

.reg-calendar-sync-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 640px) {
  .reg-calendar-sync-row {
    grid-template-columns: 1fr;
  }
}

.btn-calendar-sync {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--color-cream);
  font-size: 13px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  text-align: center;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-calendar-sync:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.main-footer {
  background-color: #04070e;
  color: #94a3b8;
  padding: 60px 0 30px;
  border-top: 1px solid rgba(56, 189, 248, 0.12);
  font-size: 13px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo-badge {
  background: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.9);
}

.footer-logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
  display: block;
}

.footer-brand-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-brand-desc {
  max-width: 380px;
  line-height: 1.6;
  margin-bottom: 18px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: #94a3b8;
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: #38bdf8;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   ABSTRACT MODAL DIALOG
   ========================================================================== */
.abstract-modal {
  position: fixed;
  inset: 0;
  background-color: rgba(6, 10, 19, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.abstract-modal.open {
  display: flex;
  opacity: 1;
}

.abstract-modal-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-2xl);
  max-width: 680px;
  width: 100%;
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2);
  position: relative;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #f1f5f9;
  color: #0f172a;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background-color: #0f172a;
  color: #ffffff;
}

.modal-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #0284c7;
  margin-bottom: 8px;
}

.modal-speaker-name {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 4px;
}

.modal-affiliation {
  font-size: 13px;
  color: #64748b;
  font-weight: 600;
  margin-bottom: 20px;
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 12px;
}

.modal-talk-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
}

.modal-talk-abstract {
  font-size: 14.5px;
  line-height: 1.7;
  color: #334155;
  margin-bottom: 20px;
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .section-header-grid {
    grid-template-columns: 1fr;
  }
  .venue-grid {
    grid-template-columns: 1fr;
  }
  .reg-content-grid {
    grid-template-columns: 1fr;
  }
  .timeline-entry {
    grid-template-columns: 1fr auto;
    gap: 16px;
  }
  .timeline-time-col {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1120px) {
  .nav-menu {
    gap: 10px;
  }
  .nav-link {
    font-size: 12px;
  }
  .btn-header-cta {
    padding: 8px 14px;
    font-size: 12px;
  }
}

@media (max-width: 890px) {
  .nav-menu, .btn-header-cta {
    display: none;
  }
  .mobile-hamburger {
    display: flex;
  }
  .mobile-nav-drawer {
    top: 78px;
  }
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .lodging-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
  .countdown-number {
    font-size: 20px;
  }
  .brand-logo-badge {
    padding: 4px 10px;
    border-radius: 10px;
  }
  .brand-logo-img {
    height: 32px;
  }
  .footer-logo-img {
    height: 36px;
  }
  .hero-main-title {
    font-size: 2rem;
  }
  .hero-main-title .highlight-accent {
    font-size: 1.12rem;
  }
  .hero-tagline {
    font-size: 0.92rem;
  }
  .hero-description {
    font-size: 0.88rem;
  }
  .hero-section {
    padding: 2.2rem 0 2.8rem;
  }
}

/* ==========================================================================
   ACTIVE NAVIGATION LINK STATE
   ========================================================================== */
.nav-link.active {
  color: #ffffff;
}

.nav-link.active::after {
  width: 100%;
}

/* ==========================================================================
   SPONSORS SUBPAGE STYLES
   ========================================================================== */
.sponsors-hero-section {
  position: relative;
  background-color: #070d18;
  background-image: 
    radial-gradient(at 80% 20%, rgba(14, 165, 233, 0.16) 0px, transparent 55%),
    radial-gradient(at 20% 80%, rgba(79, 70, 229, 0.12) 0px, transparent 55%);
  color: #ffffff;
  padding: clamp(3rem, 5vw, 4.5rem) 0 clamp(2.5rem, 4vw, 3.5rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.sponsors-hero-lead {
  font-size: clamp(0.95rem, 1.25vw, 1.15rem);
  line-height: 1.65;
  color: #cbd5e1;
  max-width: 780px;
  margin-bottom: 24px;
}

.sponsors-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: #38bdf8;
  transition: all var(--transition-fast);
  margin-top: 8px;
}

.sponsors-back-link:hover {
  color: #7dd3fc;
  transform: translateX(-4px);
}

.sponsors-grid-section {
  padding: clamp(3rem, 5vw, 4.5rem) 0;
  background-color: #f8fafc;
}

.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
  margin-top: 24px;
}

.sponsor-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
}

.sponsor-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.09);
  border-color: #38bdf8;
}

.sponsor-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.sponsor-cat-badge {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 700;
  color: #0284c7;
  background: #eff6ff;
  border: 1px solid #dbeafe;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.sponsor-local-badge {
  font-size: 10.5px;
  font-weight: 600;
  color: #475569;
  background: #f1f5f9;
  padding: 3px 8px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.sponsor-logo-box {
  width: 100%;
  height: 160px;
  background: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  margin-bottom: 20px;
  box-shadow: inset 0 0 12px rgba(15, 23, 42, 0.02);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.sponsor-card:hover .sponsor-logo-box {
  background: #fcfdfe;
  border-color: #e2e8f0;
}

.sponsor-logo-img {
  max-width: 100%;
  max-height: 120px;
  object-fit: contain;
  transition: transform var(--transition-normal);
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.06));
}

.sponsor-card:hover .sponsor-logo-img {
  transform: scale(1.05);
}

.sponsor-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.sponsor-name {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: #0f172a;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.sponsor-desc {
  font-size: 13.5px;
  line-height: 1.6;
  color: #64748b;
  margin-bottom: 18px;
}

.sponsor-benefit-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-top: auto;
  margin-bottom: 16px;
}

.sponsor-benefit-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  color: #15803d;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.sponsor-benefit-text {
  font-size: 12.5px;
  line-height: 1.5;
  color: #166534;
  font-weight: 500;
}

.sponsor-card-footer {
  padding-top: 14px;
  border-top: 1px solid #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: #64748b;
}

.sponsor-loc-pill {
  display: flex;
  align-items: center;
  gap: 5px;
  font-weight: 600;
}

.sponsor-cta-banner {
  background: linear-gradient(135deg, #070d18 0%, #0f172a 100%);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-2xl);
  padding: clamp(2rem, 4vw, 3rem);
  margin-top: 48px;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

.sponsor-cta-text h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: 700;
  margin-bottom: 6px;
  color: #ffffff;
}

.sponsor-cta-text p {
  font-size: 14px;
  color: #94a3b8;
  max-width: 600px;
}