:root {
  --bg-app: #080a0f;
  --bg-surface: #0e121a;
  --bg-surface-raised: #141a26;
  --bg-card: rgba(14, 18, 26, 0.75);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-glow: rgba(56, 189, 248, 0.35);

  --text-white: #ffffff;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --brand-cyan: #38bdf8;
  --brand-cyan-light: #7dd3fc;
  --brand-cyan-glow: rgba(56, 189, 248, 0.2);
  --brand-cyan-dark: #0284c7;

  --accent-blue: #2563eb;
  --accent-emerald: #10b981;
  --accent-slate: #334155;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 26px;
  --radius-pill: 9999px;

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-card: 0 20px 45px -15px rgba(0, 0, 0, 0.75);
  --shadow-glow: 0 0 50px rgba(56, 189, 248, 0.12);
}

html {
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

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

body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 90% 50% at 50% -10%, rgba(56, 189, 248, 0.12), transparent),
    radial-gradient(ellipse 70% 50% at 85% 65%, rgba(56, 189, 248, 0.05), transparent),
    radial-gradient(ellipse 70% 50% at 15% 45%, rgba(37, 99, 235, 0.04), transparent);
  background-attachment: fixed;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(16px, 2.5vw, 32px);
  box-sizing: border-box;
}

/* =========================================================
   HEADER & WIDE SPACIOUS NAVIGATION (NO OVERFLOW)
   ========================================================= */
header.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  max-width: 100%;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(8, 10, 15, 0.92);
  border-bottom: 1px solid var(--border-subtle);
}

header.site-header .container {
  max-width: 1400px;
  padding: 0 clamp(16px, 2.5vw, 36px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: clamp(10px, 1.5vw, 20px);
  width: 100%;
  box-sizing: border-box;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-logo-img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.25);
  transition: transform 180ms ease;
}

.brand-link:hover .brand-logo-img {
  transform: scale(1.05);
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-white);
}

.brand-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.1);
  color: var(--brand-cyan);
  border: 1px solid rgba(56, 189, 248, 0.28);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 1.2vw, 22px);
  margin: 0;
  flex-shrink: 1;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: clamp(0.82rem, 0.9vw, 0.88rem);
  font-weight: 600;
  text-decoration: none;
  transition: color 150ms ease;
  white-space: nowrap;
}

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

.nav-about-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.08);
  color: var(--brand-cyan-light) !important;
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-weight: 600;
  font-size: 0.86rem;
  transition: all 160ms ease;
}

.nav-about-btn:hover {
  background: rgba(56, 189, 248, 0.16);
  border-color: var(--brand-cyan);
  transform: translateY(-1px);
}

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

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 700;
  color: #07090e;
  background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(255, 255, 255, 0.15);
  transition: all 180ms ease;
  white-space: nowrap;
}

.nav-cta-btn:hover {
  background: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
}

.btn-text-full {
  display: inline;
}

.btn-text-short {
  display: none;
}

/* Mobile Navigation Toggle & Drawer */
.nav-toggle-btn {
  display: none;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all 150ms ease;
}

.nav-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-medium);
}

.mobile-nav-drawer {
  display: none;
  flex-direction: column;
  background: rgba(10, 14, 22, 0.98);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 24px 20px;
  gap: 10px;
}

.mobile-nav-drawer.open {
  display: flex;
}

.mobile-nav-link {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.mobile-nav-link:hover {
  color: var(--text-white);
}

.mobile-about-link {
  color: var(--brand-cyan) !important;
  font-weight: 700;
}

/* =========================================================
   HERO SECTION
   ========================================================= */
.hero-section {
  padding: 85px 0 55px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-pill .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-cyan);
  box-shadow: 0 0 8px var(--brand-cyan);
}

.hero-title {
  font-size: clamp(2.4rem, 5.2vw, 4.1rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.1;
  max-width: 940px;
  margin: 0 auto 22px;
  background: linear-gradient(180deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 740px;
  margin: 0 auto 36px;
  font-weight: 400;
  line-height: 1.65;
}

.hero-subtitle strong {
  color: var(--text-white);
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.cta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-store-hero {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 26px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: var(--text-white);
  text-decoration: none;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(56, 189, 248, 0.15);
  transition: all 180ms ease;
  position: relative;
}

.btn-store-hero:hover {
  transform: translateY(-2px);
  border-color: var(--brand-cyan);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.45), 0 0 26px rgba(56, 189, 248, 0.3);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.05) 100%);
}

.ms-logo-grid {
  display: grid;
  grid-template-columns: repeat(2, 9px);
  grid-template-rows: repeat(2, 9px);
  gap: 3px;
  flex-shrink: 0;
}

.ms-logo-grid .ms-red { background: #f25022; }
.ms-logo-grid .ms-green { background: #7fba00; }
.ms-logo-grid .ms-blue { background: #00a4ef; }
.ms-logo-grid .ms-yellow { background: #ffb900; }

.btn-store-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.btn-store-sub {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.btn-store-main {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.15;
}

.btn-store-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.16);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: var(--brand-cyan);
  margin-left: 6px;
}

.winget-row {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 6px;
}

.winget-code-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.winget-code-pill code {
  color: var(--brand-cyan);
  user-select: all;
}

.winget-copy-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  transition: all 150ms ease;
}

.winget-copy-btn:hover {
  color: var(--text-white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
  color: #07090e;
  font-size: 1.05rem;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.35);
  transition: all 180ms ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 14px 40px rgba(56, 189, 248, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 26px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: all 180ms ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: var(--border-medium);
  transform: translateY(-2px);
}

.trust-specs-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.smartscreen-hint {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 720px;
  padding: 10px 18px;
  background: rgba(56, 189, 248, 0.05);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  text-align: left;
}

.smartscreen-hint strong {
  color: var(--text-white);
}

.smartscreen-hint em {
  color: var(--brand-cyan);
  font-style: normal;
  font-weight: 600;
}

/* =========================================================
   DYNAMIC INTEROPERABILITY SECTION (NVIVO & ATLAS.ti)
   ========================================================= */
.interop-section {
  padding: 60px 0 90px;
}

.section-head {
  text-align: center;
  margin-bottom: 45px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 3.4vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-white);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

.interop-card-grand {
  background: var(--bg-card);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-xl);
  padding: 48px 36px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  backdrop-filter: blur(20px);
}

/* Animated Exchange Diagram */
.exchange-diagram {
  display: grid;
  grid-template-columns: 1fr 140px 1fr 140px 1fr;
  align-items: center;
  gap: 12px;
  margin: 20px 0 45px;
  text-align: center;
}

.exchange-node {
  background: #131722;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 18px;
  transition: all 200ms ease;
}

.exchange-node:hover {
  border-color: var(--border-medium);
  transform: translateY(-2px);
}

.exchange-node.node-center {
  background: linear-gradient(180deg, #182234 0%, #101724 100%);
  border: 1px solid var(--brand-cyan);
  box-shadow: 0 0 35px rgba(56, 189, 248, 0.25);
}

.node-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 6px;
}

.node-sub {
  font-size: 0.76rem;
  font-family: var(--font-mono);
  color: var(--brand-cyan);
}

.node-center .node-title {
  color: #ffffff;
}

/* Connecting Pulse Beam Animation */
.beam-connector {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.beam-line {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
  border-radius: 99px;
}

.beam-pulse {
  position: absolute;
  top: 0;
  left: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--brand-cyan), transparent);
  animation: beamFlow 2.4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.beam-pulse.reverse {
  animation: beamFlowReverse 2.4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes beamFlow {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(300%);
  }
}

@keyframes beamFlowReverse {
  0% {
    transform: translateX(300%);
  }

  100% {
    transform: translateX(-100%);
  }
}

.beam-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Interop Features 2-column detail */
.interop-features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 10px;
}

.interop-detail-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 24px;
}

.interop-detail-box h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.interop-detail-box p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* =========================================================
   WORKFLOW SECTION (3 PASOS DEL INVESTIGADOR)
   ========================================================= */
.workflow-section {
  padding: 60px 0 90px;
}

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

.workflow-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all 220ms ease;
  display: flex;
  flex-direction: column;
}

.workflow-card:hover {
  border-color: var(--border-medium);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), 0 0 30px rgba(56, 189, 248, 0.08);
}

.workflow-step-num {
  font-size: 0.76rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--brand-cyan);
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  display: inline-block;
  margin-bottom: 18px;
  width: fit-content;
}

.workflow-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.workflow-card-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.workflow-mini-badge {
  margin-top: 20px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* =========================================================
   LA MATRIZ COMPARATIVA ÉTICA
   ========================================================= */
.comparison-section {
  padding: 60px 0 100px;
}

.comparison-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  backdrop-filter: blur(16px);
}

.comp-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.comp-table th,
.comp-table td {
  padding: 20px 28px;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
}

.comp-table th {
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-white);
}

.comp-feature {
  width: 38%;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.96rem;
}

.comp-others {
  width: 31%;
  color: #f87171;
  font-size: 0.92rem;
  background: rgba(239, 68, 68, 0.02);
}

.comp-qualilab {
  width: 31%;
  color: #38bdf8;
  font-weight: 700;
  font-size: 0.96rem;
  background: rgba(56, 189, 248, 0.05);
}

/* =========================================================
   ACERCA DE NOSOTROS & DONACIONES INSTITUCIONALES (90% / 10%)
   ========================================================= */
.about-section {
  padding: 80px 0 110px;
  scroll-margin-top: 80px;
}

.about-card-grand {
  background: linear-gradient(180deg, rgba(16, 21, 31, 0.9) 0%, rgba(10, 13, 19, 0.96) 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-xl);
  padding: 55px 45px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.8), 0 0 45px rgba(56, 189, 248, 0.1);
  position: relative;
}

.about-header-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.12);
  color: var(--brand-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

.about-title {
  font-size: clamp(2rem, 3.2vw, 2.7rem);
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.about-lead {
  font-size: 1.12rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 860px;
}

.about-author-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 40px;
  max-width: 640px;
}

.author-avatar-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  color: var(--brand-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
}

.author-info h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-white);
}

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

/* Institutional Solidarity Box */
.solidarity-box {
  background: #0d1118;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  margin-top: 30px;
}

.solidarity-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.solidarity-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.solidarity-optional-tag {
  font-size: 0.82rem;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(56, 189, 248, 0.1);
  color: var(--brand-cyan);
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-weight: 600;
}

.solidarity-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

/* Visual Split Progress Bar */
.split-bar-visual {
  height: 12px;
  border-radius: 99px;
  display: flex;
  overflow: hidden;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.06);
}

.bar-segment-social {
  width: 90%;
  background: linear-gradient(90deg, #38bdf8 0%, #0284c7 100%);
}

.bar-segment-infra {
  width: 10%;
  background: rgba(255, 255, 255, 0.25);
}

.donation-split-display {
  display: grid;
  grid-template-columns: 9fr 1fr;
  gap: 14px;
  margin-bottom: 32px;
}

.split-card {
  padding: 20px 22px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.split-card.social {
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.split-card.infra {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
}

.split-pct {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
}

.split-card.social .split-pct {
  color: var(--brand-cyan);
}

.split-card.infra .split-pct {
  color: var(--text-secondary);
}

.split-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 4px;
}

.split-details {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Automated Unified Donation Channel */
.payment-unified-box {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-md);
  padding: 28px 30px;
  margin-top: 24px;
}

.payment-box-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.payment-box-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
  max-width: 760px;
}

.donation-preset-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.donation-preset-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
}

.donation-preset-pill strong {
  color: var(--brand-cyan);
  font-weight: 700;
}

.payment-action-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.kofi-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  background: #ff5e5b;
  color: #ffffff;
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
  transition: all 180ms ease;
  box-shadow: 0 4px 18px rgba(255, 94, 91, 0.35);
}

.kofi-btn:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 94, 91, 0.5);
}

.paypal-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--brand-cyan-light);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 180ms ease;
}

.paypal-btn:hover {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--brand-cyan);
  transform: translateY(-2px);
}

.payment-guarantee-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.payment-guarantee-tag svg {
  color: var(--brand-cyan);
}

/* =========================================================
   ACADEMIC CITATION FOR PAPERS & THESES
   ========================================================= */
.citation-section {
  padding: 40px 0 80px;
}

.citation-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 38px 36px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
}

.citation-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}

.citation-title-group h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 6px;
}

.citation-title-group p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.citation-code-box {
  background: #06080c;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--brand-cyan-light);
  line-height: 1.6;
  margin-bottom: 16px;
  word-break: break-word;
  user-select: all;
}

.copy-citation-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 160ms ease;
}

.copy-citation-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

/* =========================================================
   FOOTER
   ========================================================= */
footer.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0;
  background: #06070a;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.footer-brand-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 8px;
}

/* =========================================================
   RESPONSIVE DESIGN (FLUID, NEVER OVERFLOWS)
   ========================================================= */
@media (max-width: 1380px) {
  .btn-text-full {
    display: none;
  }

  .btn-text-short {
    display: inline;
  }

  .nav-cta-btn {
    padding: 8px 15px;
    font-size: 0.84rem;
  }

  .nav-links {
    gap: clamp(8px, 1.1vw, 16px);
  }

  .nav-links a {
    font-size: 0.84rem;
  }
}

@media (max-width: 1220px) {
  .brand-badge {
    display: none;
  }

  .nav-links {
    gap: 10px;
  }

  .nav-links a {
    font-size: 0.82rem;
  }

  .nav-about-btn {
    padding: 5px 10px;
    font-size: 0.82rem;
  }
}

@media (max-width: 1060px) {
  .nav-links {
    display: none;
  }

  .nav-toggle-btn {
    display: inline-flex;
  }

  .exchange-diagram {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .beam-connector {
    transform: rotate(90deg);
    margin: 12px 0;
  }

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

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

  .donation-split-display {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .about-card-grand {
    padding: 35px 22px;
  }

  .solidarity-box {
    padding: 24px 18px;
  }

  .comp-table th,
  .comp-table td {
    padding: 14px 16px;
    font-size: 0.88rem;
  }
}

@media (max-width: 480px) {
  .brand-title {
    font-size: 1.1rem;
  }

  .brand-logo-img {
    width: 28px;
    height: 28px;
  }

  .nav-cta-btn {
    padding: 7px 11px;
    font-size: 0.8rem;
    gap: 6px;
  }

  .nav-cta-btn svg {
    width: 13px;
    height: 13px;
  }

  .cta-row {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary,
  .btn-secondary,
  .btn-store-hero {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
  }
}