/* =============================================
   VARIABLES & RESET
   ============================================= */
:root {
  --ocean-deep:    #000d1a;
  --ocean-mid:     #001529;
  --ocean-light:   #003366;
  --ocean-surface: #006994;
  --biolum-blue:   #00b4d8;
  --biolum-cyan:   #00f5d4;
  --biolum-glow:   #7fffee;
  --text-primary:  #e0f7ff;
  --text-muted:    #8ecae6;
  --glass-bg:      rgba(0, 40, 80, 0.55);
  --glass-border:  rgba(0, 180, 216, 0.25);
  --font-head:     'Playfair Display', serif;
  --font-body:     'Raleway', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--ocean-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 400;
  overflow-x: hidden;
  line-height: 1.7;
}

a { color: var(--biolum-cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* =============================================
   BUBBLES BACKGROUND
   ============================================= */
.bubbles {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bubble {
  position: absolute;
  bottom: -80px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(0, 245, 212, 0.4), rgba(0, 180, 216, 0.08));
  border: 1px solid rgba(0, 245, 212, 0.2);
  animation: floatUp linear infinite;
  will-change: transform, opacity;
}

@keyframes floatUp {
  0%   { transform: translateY(0) translateX(0) scale(1); opacity: 0; }
  5%   { opacity: 0.7; }
  90%  { opacity: 0.3; }
  100% { transform: translateY(-110vh) translateX(var(--drift)) scale(0.5); opacity: 0; }
}

/* =============================================
   FISH ANIMATION
   ============================================= */
.fish-container {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.swim-fish {
  position: absolute;
  font-size: 1.8rem;
  animation: swimAcross linear infinite;
  will-change: transform;
  opacity: 0.55;
  filter: drop-shadow(0 0 8px rgba(0, 180, 216, 0.6));
}

.swim-fish.flip { transform: scaleX(-1); }

@keyframes swimAcross {
  0%   { left: -80px; }
  100% { left: calc(100vw + 80px); }
}

/* =============================================
   NAVBAR
   ============================================= */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(0, 13, 26, 0);
  backdrop-filter: blur(0px);
  transition: background 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
}

.navbar.scrolled {
  background: rgba(0, 13, 26, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 180, 216, 0.15);
}

.nav-brand {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--biolum-cyan);
  letter-spacing: 1px;
}

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

.nav-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color 0.3s;
  text-decoration: none;
}

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

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 6rem;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(0, 180, 216, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 80%, rgba(0, 245, 212, 0.08) 0%, transparent 50%),
    var(--ocean-deep);
  z-index: 2;
  overflow: hidden;
}

.hero-waves {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 120px;
  pointer-events: none;
}

.hero-waves svg {
  width: 100%;
  height: 100%;
  animation: waveShift 6s ease-in-out infinite alternate;
}

@keyframes waveShift {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-20px); }
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  background: rgba(0, 180, 216, 0.15);
  border: 1px solid var(--biolum-blue);
  color: var(--biolum-blue);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  animation: fadeInDown 0.8s ease 0.2s both;
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 900;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  animation: fadeInDown 0.8s ease 0.4s both;
}

.hero-title em {
  font-style: italic;
  background: linear-gradient(135deg, var(--biolum-blue), var(--biolum-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  animation: fadeInUp 0.8s ease 0.6s both;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--biolum-blue), var(--biolum-cyan));
  color: var(--ocean-deep);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.9rem 2.4rem;
  border-radius: 50px;
  transition: transform 0.3s, box-shadow 0.3s;
  animation: fadeInUp 0.8s ease 0.8s both;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0, 180, 216, 0.35);
}

.cta-btn:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 8px 30px rgba(0, 245, 212, 0.5);
  text-decoration: none;
  color: var(--ocean-deep);
}

.cta-btn.secondary {
  background: transparent;
  border: 2px solid var(--biolum-cyan);
  color: var(--biolum-cyan);
  box-shadow: none;
}

.cta-btn.secondary:hover {
  background: rgba(0, 245, 212, 0.1);
  color: var(--biolum-cyan);
}

.cta-btn span {
  animation: bounceArrow 1.5s ease infinite;
  display: inline-block;
}

@keyframes bounceArrow {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(4px); }
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.hero-scroll-hint span {
  display: block;
  width: 22px;
  height: 38px;
  border: 2px solid rgba(0, 180, 216, 0.4);
  border-radius: 20px;
  position: relative;
}

.hero-scroll-hint span::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--biolum-blue);
  border-radius: 4px;
  animation: scrollDot 2s ease infinite;
}

@keyframes scrollDot {
  0%   { top: 6px; opacity: 1; }
  80%  { top: 18px; opacity: 0; }
  100% { top: 6px; opacity: 0; }
}

/* =============================================
   STATS
   ============================================= */
.stats-section {
  position: relative;
  z-index: 2;
  background: var(--ocean-mid);
  padding: 4rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: rgba(0, 180, 216, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0, 180, 216, 0.2);
}

.stat-icon { font-size: 2.2rem; margin-bottom: 0.75rem; }

.stat-number {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: var(--biolum-cyan);
  margin-bottom: 0.4rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* =============================================
   SECTIONS
   ============================================= */
.info-section {
  position: relative;
  z-index: 2;
  padding: 6rem 0;
  background: var(--ocean-deep);
}

.info-section.dark { background: var(--ocean-mid); }
.info-section.studies { background: var(--ocean-deep); }

.section-wave {
  position: absolute;
  left: 0; right: 0;
  height: 60px;
  pointer-events: none;
}

.section-wave.top { top: 0; }
.section-wave.bottom { bottom: 0; }
.section-wave svg { width: 100%; height: 100%; }

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--biolum-blue);
  margin-bottom: 1rem;
  border: 1px solid rgba(0, 180, 216, 0.3);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
}

.section-header h2 {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* =============================================
   GLASS CARDS
   ============================================= */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  backdrop-filter: blur(8px);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(0, 180, 216, 0.2);
  border-color: rgba(0, 245, 212, 0.4);
}

/* =============================================
   FEATURE GRID (SECTION 1)
   ============================================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  padding: 2.2rem 1.8rem;
}

.feature-icon {
  font-size: 2.4rem;
  margin-bottom: 1rem;
  display: block;
}

.feature-card h3 {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--biolum-cyan);
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.feature-card strong { color: var(--text-primary); }

/* =============================================
   MIRROR LAYOUT (SECTION 2)
   ============================================= */
.mirror-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: center;
}

.mirror-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.mirror-frame {
  width: 220px;
  height: 280px;
  background: linear-gradient(135deg, rgba(0, 40, 80, 0.8), rgba(0, 80, 120, 0.4));
  border: 2px solid rgba(0, 245, 212, 0.4);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(0, 180, 216, 0.3), inset 0 0 40px rgba(0, 180, 216, 0.05);
}

.mirror-frame::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 50%;
  background: linear-gradient(180deg, rgba(0, 245, 212, 0.06), transparent);
}

.mirror-frame::after {
  content: 'ESPEJO';
  position: absolute;
  top: 50%;
  left: 0; right: 0;
  text-align: center;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 4px;
  color: rgba(0, 180, 216, 0.4);
  border-top: 1px dashed rgba(0, 180, 216, 0.2);
  padding-top: 0.4rem;
  transform: translateY(-50%);
}

.fish-emoji, .reflection {
  font-size: 3.5rem;
  filter: drop-shadow(0 0 12px rgba(0, 245, 212, 0.7));
  animation: fishFloat 3s ease-in-out infinite;
}

.reflection {
  transform: scaleX(-1);
  opacity: 0.65;
  animation-delay: 0.2s;
  filter: drop-shadow(0 0 12px rgba(0, 180, 216, 0.5));
}

@keyframes fishFloat {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

.reflection { animation-name: fishFloatReflect; }

@keyframes fishFloatReflect {
  0%, 100% { transform: scaleX(-1) translateY(0); }
  50%       { transform: scaleX(-1) translateY(8px); }
}

.mirror-label {
  font-family: var(--font-head);
  font-size: 1rem;
  font-style: italic;
  color: var(--biolum-cyan);
  text-align: center;
}

.mirror-sublabel {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

.mirror-text .section-tag { margin-bottom: 0.5rem; }

.mirror-text h2 {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 1.2rem;
}

.mirror-text .lead {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.mirror-text p {
  color: var(--text-muted);
  margin-bottom: 1.2rem;
  font-size: 0.98rem;
}

.mirror-text strong { color: var(--text-primary); }
.mirror-text em { color: var(--biolum-cyan); font-style: italic; }

.highlight-box {
  background: rgba(0, 180, 216, 0.08);
  border-left: 3px solid var(--biolum-cyan);
  border-radius: 0 12px 12px 0;
  padding: 1.2rem 1.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.92rem;
}

.highlight-box p {
  color: var(--text-primary) !important;
  font-weight: 600;
  margin-bottom: 0.6rem !important;
  font-size: 0.9rem !important;
}

.highlight-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.highlight-box ul li { color: var(--text-muted); font-size: 0.9rem; }
.highlight-box ul li strong { color: var(--biolum-cyan); }

.bonus-fact {
  background: rgba(0, 245, 212, 0.06);
  border: 1px solid rgba(0, 245, 212, 0.2);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  position: relative;
}

.bonus-label {
  display: inline-block;
  background: rgba(0, 245, 212, 0.15);
  color: var(--biolum-cyan);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.4rem;
}

.bonus-fact strong { color: var(--text-primary); }

/* =============================================
   TIMELINE (SECTION 3)
   ============================================= */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  padding-left: 4rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 1.6rem;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--biolum-blue), transparent);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  position: relative;
}

.timeline-icon {
  position: absolute;
  left: -3.2rem;
  top: 1rem;
  font-size: 1.4rem;
  width: 3rem;
  height: 3rem;
  background: var(--ocean-mid);
  border: 2px solid var(--biolum-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 1;
}

.timeline-content {
  flex: 1;
  padding: 1.8rem;
}

.timeline-content h3 {
  font-family: var(--font-head);
  font-size: 1.2rem;
  color: var(--biolum-cyan);
  margin-bottom: 0.6rem;
}

.timeline-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.timeline-content strong { color: var(--text-primary); }
.timeline-content em { color: var(--biolum-cyan); font-style: italic; }

/* =============================================
   PAIN LAYOUT (SECTION 4)
   ============================================= */
.pain-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.pain-card {
  padding: 2rem 1.8rem;
  text-align: center;
}

.pain-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.pain-card h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--biolum-cyan);
  margin-bottom: 0.75rem;
}

.pain-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.pain-card strong { color: var(--text-primary); }
.pain-card em { color: var(--biolum-glow); font-style: italic; }

.quote-block {
  text-align: center;
  padding: 3rem 2rem;
  background: rgba(0, 180, 216, 0.05);
  border-top: 1px solid rgba(0, 180, 216, 0.15);
  border-bottom: 1px solid rgba(0, 180, 216, 0.15);
}

blockquote {
  font-family: var(--font-head);
  font-style: italic;
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--text-primary);
  line-height: 1.6;
  max-width: 700px;
  margin: 0 auto 1rem;
  position: relative;
}

blockquote::before {
  content: '"';
  font-size: 5rem;
  color: rgba(0, 180, 216, 0.2);
  position: absolute;
  top: -1.5rem;
  left: -1rem;
  line-height: 1;
}

cite {
  font-size: 0.85rem;
  color: var(--biolum-blue);
  font-style: normal;
  font-weight: 600;
  letter-spacing: 1px;
}

/* =============================================
   STUDIES GRID (SECTION 5)
   ============================================= */
.studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.study-card {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.study-year {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--biolum-blue);
}

.study-journal {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.study-title {
  font-family: var(--font-head);
  font-size: 1.1rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.study-authors {
  font-size: 0.82rem;
  color: var(--biolum-cyan);
  font-style: italic;
}

.study-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  flex: 1;
  line-height: 1.6;
}

.study-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--biolum-cyan);
  text-decoration: none;
  transition: color 0.2s, letter-spacing 0.2s;
}

.study-link:hover {
  color: var(--biolum-glow);
  letter-spacing: 0.5px;
  text-decoration: none;
}

.study-link-label {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(0, 180, 216, 0.08);
  border: 1px solid var(--glass-border);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
}

.book-card {
  border-color: rgba(127, 255, 238, 0.25);
}

/* =============================================
   CONCLUSION
   ============================================= */
.conclusion {
  position: relative;
  z-index: 2;
  background: var(--ocean-mid);
  padding: 6rem 0;
  text-align: center;
}

.conclusion-inner {
  max-width: 700px;
  margin: 0 auto;
}

.conclusion-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: block;
  filter: drop-shadow(0 0 16px rgba(0, 245, 212, 0.6));
  animation: pulseGlow 3s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { filter: drop-shadow(0 0 16px rgba(0, 245, 212, 0.6)); transform: scale(1); }
  50%       { filter: drop-shadow(0 0 28px rgba(0, 245, 212, 0.9)); transform: scale(1.08); }
}

.conclusion h2 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.conclusion p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 1rem;
  line-height: 1.8;
}

.conclusion strong { color: var(--text-primary); }
.conclusion em { color: var(--biolum-cyan); font-style: italic; }

.conclusion-cta {
  margin-top: 2.5rem;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  position: relative;
  z-index: 2;
  background: var(--ocean-deep);
  border-top: 1px solid rgba(0, 180, 216, 0.1);
  padding: 2.5rem 0;
  text-align: center;
}

.footer-brand {
  font-family: var(--font-head);
  font-size: 1.3rem;
  color: var(--biolum-cyan);
  margin-bottom: 0.5rem;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.footer-note {
  font-size: 0.75rem !important;
  color: rgba(142, 202, 230, 0.5) !important;
}

/* =============================================
   REVEAL ANIMATIONS
   ============================================= */
.reveal, .reveal-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible, .reveal-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-item:nth-child(2) { transition-delay: 0.1s; }
.reveal-item:nth-child(3) { transition-delay: 0.2s; }
.reveal-item:nth-child(4) { transition-delay: 0.3s; }

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =============================================
   PDF BUTTON
   ============================================= */
.pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(0, 245, 212, 0.1);
  border: 1.5px solid rgba(0, 245, 212, 0.5);
  color: var(--biolum-cyan);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.5rem 1.1rem;
  border-radius: 50px;
  text-decoration: none;
  transition: background 0.3s, box-shadow 0.3s, transform 0.2s;
  white-space: nowrap;
}

.pdf-btn:hover {
  background: rgba(0, 245, 212, 0.18);
  box-shadow: 0 0 16px rgba(0, 245, 212, 0.3);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--biolum-glow);
}

.pdf-btn.loading {
  opacity: 0.6;
  pointer-events: none;
}

.pdf-btn.loading span::after {
  content: '...';
  animation: dots 1s steps(3, end) infinite;
}

@keyframes dots {
  0%   { content: ''; }
  33%  { content: '.'; }
  66%  { content: '..'; }
  100% { content: '...'; }
}

.pdf-cta {
  background: linear-gradient(135deg, #005b8e, #003366);
  border: 1.5px solid rgba(0, 180, 216, 0.5);
  color: var(--biolum-cyan);
  gap: 8px;
}

.pdf-cta:hover {
  background: linear-gradient(135deg, #006994, #004080);
  color: var(--biolum-glow);
  box-shadow: 0 6px 24px rgba(0, 180, 216, 0.3);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mirror-layout { grid-template-columns: 1fr; }
  .mirror-visual { order: -1; display: flex; justify-content: center; }
  .timeline { padding-left: 2.5rem; }
  .timeline::before { left: 0.8rem; }
  .timeline-icon { left: -1.8rem; width: 2.2rem; height: 2.2rem; font-size: 1rem; }
  .hero-title { font-size: clamp(2.8rem, 12vw, 4.5rem); }
}