/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }

/* ── React Root (빈 상태일 때 숨김) ── */
#root:empty { display: none; }

/* ── Base ── */
.gn {
  width: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #1E293B;
  background: #FFFFFF;
  overflow-x: hidden;
}

/* ── Scroll Animation ── */
[data-animate] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
[data-animate].gn-animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* ── Section Label ── */
.gn__section-label {
  font-size: clamp(11px, 1.3vw, 13px);
  font-weight: 700;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: #94A3B8;
  margin: 0 0 14px;
  text-align: center;
}
.gn__section-desc {
  font-size: clamp(16px, 2.2vw, 20px);
  color: #64748B;
  margin: 0 0 48px;
  text-align: center;
  line-height: 1.7;
}

/* ── S1: Hero ── */
.gn__hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 60px;
  overflow: hidden;
  background: linear-gradient(170deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
}
.gn__hero-particles {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(circle 400px at 25% 30%, rgba(59,130,246,0.06) 0%, transparent 100%),
    radial-gradient(circle 300px at 70% 20%, rgba(99,102,241,0.04) 0%, transparent 100%),
    radial-gradient(circle 350px at 60% 75%, rgba(59,130,246,0.05) 0%, transparent 100%);
  animation: gn-drift 20s ease-in-out infinite alternate;
  pointer-events: none;
}
.gn__hero-particles--2 {
  background:
    radial-gradient(circle 200px at 80% 60%, rgba(255,255,255,0.02) 0%, transparent 100%),
    radial-gradient(circle 250px at 15% 55%, rgba(59,130,246,0.03) 0%, transparent 100%);
  animation: gn-drift2 25s ease-in-out infinite alternate;
}
@keyframes gn-drift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, -20px) scale(1.05); }
}
@keyframes gn-drift2 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-20px, 15px) scale(1.03); }
}
.gn__hero-content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center;
  gap: 20px; max-width: 720px;
}
.gn__hero-badge {
  font-size: clamp(10px, 1.3vw, 12px);
  font-weight: 600; letter-spacing: 3px; text-transform: uppercase;
  color: #93C5FD; padding: 8px 24px;
  border: 1px solid rgba(147,197,253,0.25); border-radius: 50px;
  background: rgba(59,130,246,0.08);
  animation: gn-fadeIn 1s ease-out 0.2s both;
}
.gn__hero-title {
  font-size: clamp(48px, 10vw, 88px);
  font-weight: 800; letter-spacing: clamp(6px, 1.5vw, 16px);
  color: #F8FAFC;
  animation: gn-fadeIn 1s ease-out 0.5s both;
}
.gn__hero-subtitle {
  font-size: clamp(18px, 3vw, 26px); font-weight: 300;
  color: rgba(248,250,252,0.7); letter-spacing: 0.5px;
  animation: gn-fadeIn 1s ease-out 0.8s both;
}
.gn__hero-desc {
  font-size: clamp(14px, 1.8vw, 17px);
  color: rgba(248,250,252,0.4); margin: 4px 0 0; line-height: 1.9;
  animation: gn-fadeIn 1s ease-out 1.1s both;
}
@keyframes gn-fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.gn__hero-scroll {
  position: absolute; bottom: 32px;
  color: rgba(148,163,184,0.5);
  animation: gn-bounce 2s ease-in-out infinite;
}
@keyframes gn-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

/* ── S2: Philosophy ── */
.gn__philosophy {
  padding: 120px 24px;
  display: flex; flex-direction: column; align-items: center;
  background: #F8FAFC;
}
.gn__philosophy-timeline {
  display: flex; flex-direction: column;
  max-width: 560px; width: 100%; margin: 32px 0 48px;
}
.gn__philosophy-item {
  display: flex; align-items: flex-start; gap: 20px; padding: 28px 0;
}
.gn__philosophy-year {
  font-size: clamp(28px, 4vw, 36px); font-weight: 800;
  color: #3B82F6; min-width: 80px; text-align: right; line-height: 1; padding-top: 2px;
}
.gn__philosophy-line {
  width: 2px; align-self: stretch; flex-shrink: 0; position: relative;
  background: linear-gradient(180deg, #3B82F6 0%, #BFDBFE 100%);
}
.gn__philosophy-line::before {
  content: ''; position: absolute; top: 6px; left: -4px;
  width: 10px; height: 10px; border-radius: 50%; background: #3B82F6;
}
.gn__philosophy-text {
  font-size: clamp(16px, 2vw, 19px);
  color: #475569; line-height: 1.7;
}
.gn__philosophy-quote {
  font-size: clamp(15px, 2vw, 18px); font-style: italic;
  color: #94A3B8; text-align: center; letter-spacing: 0.5px;
}

/* ── S3: Brand Units ── */
.gn__units {
  padding: 120px 24px;
  display: flex; flex-direction: column; align-items: center;
  background: #FFFFFF;
}
.gn__units-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 24px; width: 100%; max-width: 1040px;
}
.gn__unit-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 24px;
  padding: 44px 32px 36px;
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.gn__unit-card:hover {
  transform: translateY(-8px);
  border-color: #CBD5E1;
  box-shadow: 0 20px 60px rgba(15,23,42,0.08), 0 4px 16px rgba(15,23,42,0.04);
}
.gn__unit-icon {
  width: 68px; height: 68px; border-radius: 20px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 8px;
}
.gn__unit-card--minihome .gn__unit-icon {
  background: linear-gradient(135deg, #e0f2fe, #bae6fd); color: #0ea5e9;
}
.gn__unit-card--pensieve .gn__unit-icon {
  background: linear-gradient(135deg, #ede9fe, #ddd6fe); color: #7c3aed;
}
.gn__unit-card--owlpost .gn__unit-icon {
  background: linear-gradient(135deg, #fef3c7, #fde68a); color: #d97706;
}
.gn__unit-card--genomic-ai .gn__unit-icon {
  background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669;
}
.gn__unit-card--pickme .gn__unit-icon {
  background: linear-gradient(135deg, #ffe4e6, #fecdd3); color: #e11d48;
}
.gn__unit-card--notice .gn__unit-icon {
  background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: #1a56db;
}
.gn__unit-name { font-size: 24px; font-weight: 800; letter-spacing: 2px; color: #0F172A; }
.gn__unit-card--minihome .gn__unit-tagline { color: #0ea5e9; }
.gn__unit-card--pensieve .gn__unit-tagline { color: #7c3aed; }
.gn__unit-card--owlpost .gn__unit-tagline { color: #d97706; }
.gn__unit-card--genomic-ai .gn__unit-tagline { color: #059669; }
.gn__unit-card--pickme .gn__unit-tagline { color: #e11d48; }
.gn__unit-card--notice .gn__unit-tagline { color: #1a56db; }
.gn__unit-tagline { font-size: 16px; font-weight: 600; }
.gn__unit-desc { font-size: 15px; color: #64748B; line-height: 1.8; max-width: 320px; }

/* ── S4: Value Proposition ── */
.gn__values {
  padding: 100px 24px;
  background: #F1F5F9;
}
.gn__values-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 40px; max-width: 960px; margin: 0 auto;
}
.gn__value-item {
  display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center;
}
.gn__value-number {
  font-size: clamp(44px, 8vw, 72px); font-weight: 800;
  color: #0F172A;
  line-height: 1;
}
.gn__value-label {
  font-size: clamp(15px, 2vw, 17px); color: #64748B; letter-spacing: 0.5px;
}

/* ── S5: Technology ── */
.gn__tech {
  padding: 120px 24px;
  display: flex; flex-direction: column; align-items: center;
  background: #FFFFFF;
}
.gn__tech-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 24px; width: 100%; max-width: 1040px;
}
.gn__tech-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0; border-radius: 24px;
  padding: 44px 32px 36px;
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.gn__tech-card:hover {
  transform: translateY(-8px);
  border-color: #CBD5E1;
  box-shadow: 0 20px 60px rgba(15,23,42,0.08), 0 4px 16px rgba(15,23,42,0.04);
}
.gn__tech-icon {
  width: 68px; height: 68px; border-radius: 20px;
  background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
  display: flex; align-items: center; justify-content: center; color: #3B82F6; margin-bottom: 8px;
}
.gn__tech-title { font-size: 24px; font-weight: 800; letter-spacing: 0.5px; color: #0F172A; }
.gn__tech-desc { font-size: 15px; color: #64748B; line-height: 1.8; max-width: 320px; }

/* ── S6: CTA ── */
.gn__cta {
  padding: 120px 24px;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  background: #0F172A;
  position: relative;
}
.gn__cta::before {
  content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 120px; height: 1px;
  background: linear-gradient(90deg, transparent 0%, #3B82F6 50%, transparent 100%);
}
.gn__cta-title { font-size: clamp(26px, 4vw, 40px); font-weight: 800; margin: 0 0 18px; color: #F8FAFC; }
.gn__cta-desc { font-size: clamp(15px, 2vw, 18px); color: rgba(248,250,252,0.5); margin: 0 0 48px; line-height: 1.8; }
.gn__cta-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 20px 44px;
  background: #3B82F6;
  color: #FFFFFF; font-size: clamp(16px, 2.5vw, 18px); font-weight: 700;
  border-radius: 14px; letter-spacing: 0.5px;
  transition: transform 0.2s, box-shadow 0.3s, background 0.2s;
  box-shadow: 0 4px 20px rgba(59,130,246,0.3);
}
.gn__cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(59,130,246,0.4); background: #2563EB; }
.gn__cta-btn:active { transform: translateY(0); }

/* ── S7: Footer ── */
.gn__footer {
  padding: 56px 24px; background: #F8FAFC;
  border-top: 1px solid #E2E8F0;
}
.gn__footer-inner {
  max-width: 960px; margin: 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: 18px; text-align: center;
}
.gn__footer-brand { font-size: 22px; font-weight: 800; letter-spacing: 6px; color: #0F172A; }
.gn__footer-links { font-size: 13px; color: #94A3B8; letter-spacing: 0.5px; }
.gn__footer-info {
  display: flex; flex-direction: column; gap: 6px;
  font-size: 13px; color: #64748B;
}
.gn__footer-info a { color: #64748B; transition: color 0.2s; }
.gn__footer-info a:hover { color: #3B82F6; }
.gn__footer-copy { font-size: 12px; color: #94A3B8; margin: 8px 0 0; }

/* ── Card CTA Arrow Animation ── */
@keyframes gn-arrow-nudge {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(5px); }
}

/* ── Clickable Cards ── */
.gn__unit-card--minihome,
.gn__unit-card--pensieve,
.gn__unit-card--owlpost,
.gn__unit-card--genomic-ai,
.gn__unit-card--pickme,
.gn__unit-card--notice { cursor: pointer; position: relative; }

.gn__unit-card--minihome::after,
.gn__unit-card--pensieve::after,
.gn__unit-card--owlpost::after,
.gn__unit-card--genomic-ai::after,
.gn__unit-card--pickme::after,
.gn__unit-card--notice::after { display: none; }

/* ── Real CTA Button ── */
.gn__unit-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 24px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: #FFFFFF;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.2s;
}
.gn__unit-card--minihome .gn__unit-cta {
  background: #0ea5e9; box-shadow: 0 2px 10px rgba(14,165,233,0.2);
}
.gn__unit-card--minihome:hover .gn__unit-cta {
  background: #0284c7; box-shadow: 0 8px 28px rgba(14,165,233,0.3);
}
.gn__unit-card--pensieve .gn__unit-cta {
  background: #7c3aed; box-shadow: 0 2px 10px rgba(124,58,237,0.2);
}
.gn__unit-card--pensieve:hover .gn__unit-cta {
  background: #6d28d9; box-shadow: 0 8px 28px rgba(124,58,237,0.3);
}
.gn__unit-card--owlpost .gn__unit-cta {
  background: #d97706; box-shadow: 0 2px 10px rgba(217,119,6,0.2);
}
.gn__unit-card--owlpost:hover .gn__unit-cta {
  background: #b45309; box-shadow: 0 8px 28px rgba(217,119,6,0.3);
}
.gn__unit-card--genomic-ai .gn__unit-cta {
  background: #059669; box-shadow: 0 2px 10px rgba(5,150,105,0.2);
}
.gn__unit-card--genomic-ai:hover .gn__unit-cta {
  background: #047857; box-shadow: 0 8px 28px rgba(5,150,105,0.3);
}
.gn__unit-card--pickme .gn__unit-cta {
  background: #e11d48; box-shadow: 0 2px 10px rgba(225,29,72,0.2);
}
.gn__unit-card--pickme:hover .gn__unit-cta {
  background: #be123c; box-shadow: 0 8px 28px rgba(225,29,72,0.3);
}
.gn__unit-card--notice .gn__unit-cta {
  background: #1a56db; box-shadow: 0 2px 10px rgba(26,86,219,0.2);
}
.gn__unit-card--notice:hover .gn__unit-cta {
  background: #1e40af; box-shadow: 0 8px 28px rgba(26,86,219,0.3);
}
.gn__unit-card:hover .gn__unit-cta {
  transform: translateY(-3px);
}
.gn__unit-cta-arrow {
  display: inline-block;
  font-size: 1.1rem;
  animation: gn-arrow-nudge 1s ease-in-out infinite;
}

/* ── PENSIEVE Modal ── */
.pv-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(15,23,42,0.6);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.35s ease;
}
.pv-overlay.pv-open { opacity: 1; pointer-events: auto; }

.pv-modal {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 24px;
  width: 92%; max-width: 520px; max-height: 90vh;
  overflow-y: auto;
  padding: 44px 36px;
  transform: translateY(30px) scale(0.96);
  transition: transform 0.35s cubic-bezier(0.22,1,0.36,1);
  position: relative;
  box-shadow: 0 24px 80px rgba(15,23,42,0.2);
}
.pv-overlay.pv-open .pv-modal {
  transform: translateY(0) scale(1);
}

.pv-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px; border-radius: 50%;
  background: #F1F5F9; border: 1px solid #E2E8F0;
  color: #64748B; font-size: 18px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, color 0.2s;
}
.pv-close:hover { background: #E2E8F0; color: #0F172A; }

.pv-header { text-align: center; margin-bottom: 28px; }
.pv-header h2 {
  font-size: 24px; font-weight: 800; color: #0F172A;
  letter-spacing: 4px; margin: 0 0 8px;
}
.pv-header p {
  font-size: 15px; color: #64748B; line-height: 1.6;
}

/* ── Form ── */
.pv-form { display: flex; flex-direction: column; gap: 16px; }
.pv-field label {
  display: block; font-size: 12px; font-weight: 600;
  color: #3B82F6; letter-spacing: 1.5px; text-transform: uppercase;
  margin-bottom: 6px;
}
.pv-field input {
  width: 100%; padding: 14px 16px;
  background: #F8FAFC;
  border: 1.5px solid #E2E8F0; border-radius: 12px;
  color: #0F172A; font-size: 15px;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
}
.pv-field input::placeholder { color: #94A3B8; }
.pv-field input:focus { border-color: #3B82F6; box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }

.pv-submit {
  width: 100%; padding: 16px; margin-top: 4px;
  background: #3B82F6;
  color: #FFFFFF; font-size: 16px; font-weight: 700;
  border: none; border-radius: 14px; cursor: pointer;
  letter-spacing: 0.5px;
  transition: transform 0.2s, box-shadow 0.3s, background 0.2s;
  box-shadow: 0 4px 20px rgba(59,130,246,0.25);
}
.pv-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(59,130,246,0.3); background: #2563EB; }
.pv-submit:active { transform: translateY(0); }
.pv-submit:disabled {
  opacity: 0.5; cursor: not-allowed; transform: none;
  box-shadow: none;
}

/* ── Loading ── */
.pv-loading {
  display: none; flex-direction: column; align-items: center;
  gap: 20px; padding: 40px 0; text-align: center;
}
.pv-loading.pv-show { display: flex; }
.pv-spinner {
  width: 48px; height: 48px; border-radius: 50%;
  border: 3px solid #E2E8F0;
  border-top-color: #3B82F6;
  animation: pv-spin 0.8s linear infinite;
}
@keyframes pv-spin { to { transform: rotate(360deg); } }
.pv-loading p {
  font-size: 15px; color: #64748B;
  animation: pv-pulse 1.5s ease-in-out infinite;
}
@keyframes pv-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ── Results ── */
.pv-results { display: none; }
.pv-results.pv-show { display: block; }
.pv-results-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; flex-wrap: wrap; gap: 8px;
}
.pv-results-header h3 {
  font-size: 18px; font-weight: 700; color: #0F172A;
}
.pv-results-header span {
  font-size: 13px; color: #94A3B8;
}
.pv-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 12px; margin-bottom: 24px;
}
.pv-photo-wrap {
  position: relative; border-radius: 14px; overflow: hidden;
  aspect-ratio: 1; background: #F1F5F9;
  border: 1px solid #E2E8F0;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.pv-photo-wrap:hover { border-color: #CBD5E1; box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.pv-photo-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
}
.pv-photo-date {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 8px 10px;
  background: linear-gradient(transparent, rgba(15,23,42,0.7));
  font-size: 11px; color: rgba(255,255,255,0.85);
}
.pv-photo-save {
  position: absolute; top: 8px; right: 8px;
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.9); border: 1px solid #E2E8F0;
  color: #3B82F6; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.2s;
}
.pv-photo-wrap:hover .pv-photo-save { opacity: 1; }
.pv-photo-save:hover { background: #FFFFFF; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }

.pv-actions {
  display: flex; gap: 10px;
}
.pv-btn-dl {
  flex: 1; padding: 14px; border-radius: 12px;
  font-size: 14px; font-weight: 700; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: transform 0.2s, box-shadow 0.2s; border: none;
}
.pv-btn-dl:hover { transform: translateY(-1px); }
.pv-btn-all {
  background: #3B82F6;
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(59,130,246,0.25);
}
.pv-btn-back {
  background: #F1F5F9;
  border: 1px solid #E2E8F0 !important;
  color: #475569;
}
.pv-btn-back:hover { background: #E2E8F0; }

/* ── Page transition overlay ── */
.page-transition {
  position: fixed; inset: 0; z-index: 9999;
  background: #FFFFFF;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.4s ease;
}
.page-transition.active { opacity: 1; pointer-events: auto; }
.page-transition h2 {
  font-size: 28px; font-weight: 800; letter-spacing: 6px;
  color: #0F172A; margin: 0;
}
.page-transition p {
  font-size: 14px; color: #94A3B8;
  animation: pv-pulse 1.5s ease-in-out infinite;
}

/* ── Nav Bar ── */
.gn__nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(16px, 4vw, 48px);
  height: 64px;
  background: transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.gn__nav.gn__nav--scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 8px rgba(15,23,42,0.06);
}
.gn__nav-logo {
  font-size: 20px; font-weight: 800; letter-spacing: 4px;
  color: #F8FAFC;
  transition: color 0.3s ease;
}
.gn__nav.gn__nav--scrolled .gn__nav-logo { color: #0F172A; }
.gn__nav-right { display: flex; align-items: center; gap: 12px; }
.gn__nav-user {
  font-size: 14px; font-weight: 600; color: #F8FAFC;
  transition: color 0.3s ease;
}
.gn__nav.gn__nav--scrolled .gn__nav-user { color: #0F172A; }
.gn__nav-btn {
  padding: 8px 20px; border-radius: 8px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  border: 1.5px solid rgba(248,250,252,0.3);
  background: transparent; color: #F8FAFC;
  transition: all 0.2s ease;
}
.gn__nav-btn:hover {
  background: rgba(248,250,252,0.1);
  border-color: rgba(248,250,252,0.5);
}
.gn__nav.gn__nav--scrolled .gn__nav-btn {
  border-color: #E2E8F0; color: #0F172A;
}
.gn__nav.gn__nav--scrolled .gn__nav-btn:hover {
  background: #F1F5F9; border-color: #CBD5E1;
}
.gn__nav-btn--logout {
  border-color: transparent; background: transparent;
  color: rgba(248,250,252,0.6); font-size: 13px;
}
.gn__nav-btn--logout:hover { color: #F8FAFC; background: rgba(248,250,252,0.08); }
.gn__nav.gn__nav--scrolled .gn__nav-btn--logout {
  color: #94A3B8; border-color: transparent;
}
.gn__nav.gn__nav--scrolled .gn__nav-btn--logout:hover {
  color: #475569; background: #F1F5F9;
}

/* ── Login Modal ── */
.login-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(15,23,42,0.6);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.35s ease;
}
.login-overlay.login-open { opacity: 1; pointer-events: auto; }
.login-modal {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 24px;
  width: 92%; max-width: 400px;
  padding: 44px 36px;
  transform: translateY(30px) scale(0.96);
  transition: transform 0.35s cubic-bezier(0.22,1,0.36,1);
  position: relative;
  box-shadow: 0 24px 80px rgba(15,23,42,0.2);
}
.login-overlay.login-open .login-modal {
  transform: translateY(0) scale(1);
}
.login-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px; border-radius: 50%;
  background: #F1F5F9; border: 1px solid #E2E8F0;
  color: #64748B; font-size: 18px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, color 0.2s;
}
.login-close:hover { background: #E2E8F0; color: #0F172A; }
.login-header { text-align: center; margin-bottom: 28px; }
.login-header h2 {
  font-size: 24px; font-weight: 800; color: #0F172A;
  letter-spacing: 2px; margin: 0 0 8px;
}
.login-header p { font-size: 15px; color: #64748B; line-height: 1.6; }
.login-form { display: flex; flex-direction: column; gap: 16px; }
.login-field label {
  display: block; font-size: 12px; font-weight: 600;
  color: #3B82F6; letter-spacing: 1.5px; text-transform: uppercase;
  margin-bottom: 6px;
}
.login-field input {
  width: 100%; padding: 14px 16px;
  background: #F8FAFC;
  border: 1.5px solid #E2E8F0; border-radius: 12px;
  color: #0F172A; font-size: 15px;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}
.login-field input::placeholder { color: #94A3B8; }
.login-field input:focus { border-color: #3B82F6; box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }
.login-submit {
  width: 100%; padding: 16px; margin-top: 4px;
  background: #3B82F6; color: #FFFFFF;
  font-size: 16px; font-weight: 700; font-family: inherit;
  border: none; border-radius: 14px; cursor: pointer;
  letter-spacing: 0.5px;
  transition: transform 0.2s, box-shadow 0.3s, background 0.2s;
  box-shadow: 0 4px 20px rgba(59,130,246,0.25);
}
.login-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(59,130,246,0.3); background: #2563EB; }
.login-submit:active { transform: translateY(0); }
.login-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }
.login-error {
  font-size: 14px; color: #EF4444; text-align: center;
  min-height: 20px; margin-top: 4px;
}

/* ── Responsive ── */
@media (min-width: 600px) {
  .gn__units-grid { grid-template-columns: repeat(2, 1fr); }
  .gn__values-grid { grid-template-columns: repeat(3, 1fr); }
  .gn__philosophy-item { gap: 28px; }
  .gn__philosophy-year { min-width: 100px; }
  .gn__footer-info { flex-direction: row; gap: 20px; flex-wrap: wrap; justify-content: center; }
}
@media (min-width: 900px) {
  .gn__hero { padding: 140px 48px 100px; }
  .gn__units-grid { grid-template-columns: repeat(3, 1fr); }
  .gn__tech-grid { grid-template-columns: repeat(4, 1fr); max-width: 1040px; }
  .gn__philosophy, .gn__units, .gn__tech, .gn__cta { padding-left: 48px; padding-right: 48px; }
  .gn__unit-card { padding: 48px 36px 40px; }
  .gn__philosophy-timeline { max-width: 640px; }
}
/* ── S5.5: Demo ── */
.gn__demo {
  padding: 120px 24px;
  display: flex; flex-direction: column; align-items: center;
  background: #F8FAFC;
}
.gn__demo-card {
  width: 100%; max-width: 600px;
  background: #FFFFFF;
  border: 1px solid #E2E8F0; border-radius: 24px;
  padding: 36px 32px;
  box-shadow: 0 4px 24px rgba(15,23,42,0.06);
}
.gn__demo-field { margin-bottom: 16px; }
.gn__demo-field label {
  display: block; font-size: 13px; font-weight: 600;
  color: #3B82F6; letter-spacing: 1px; text-transform: uppercase;
  margin-bottom: 6px;
}
.gn__demo-field select,
.gn__demo-field textarea {
  width: 100%; padding: 12px 14px;
  background: #F8FAFC;
  border: 1.5px solid #E2E8F0; border-radius: 12px;
  color: #0F172A; font-size: 15px; font-family: inherit;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}
.gn__demo-field select:focus,
.gn__demo-field textarea:focus {
  border-color: #3B82F6; box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.gn__demo-field textarea { resize: vertical; }
.gn__demo-field textarea::placeholder { color: #94A3B8; }
.gn__demo-btn {
  width: 100%; padding: 16px; margin-top: 8px;
  background: #3B82F6; color: #FFFFFF;
  font-size: 16px; font-weight: 700; font-family: inherit;
  border: none; border-radius: 14px; cursor: pointer;
  transition: transform 0.2s, box-shadow 0.3s, background 0.2s;
  box-shadow: 0 4px 20px rgba(59,130,246,0.25);
}
.gn__demo-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(59,130,246,0.3); background: #2563EB; }
.gn__demo-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }
.gn__demo-error {
  font-size: 14px; color: #EF4444; text-align: center;
  min-height: 20px; margin-top: 8px;
}
.gn__demo-result { margin-top: 24px; }
.gn__demo-result-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.gn__demo-result-header strong { font-size: 16px; color: #0F172A; }
.gn__demo-result-header div { display: flex; gap: 8px; }
.gn__demo-copy, .gn__demo-retry {
  padding: 6px 16px; border-radius: 8px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  border: none; transition: background 0.2s;
}
.gn__demo-copy { background: #059669; color: #fff; }
.gn__demo-copy:hover { background: #047857; }
.gn__demo-retry { background: #F1F5F9; color: #475569; border: 1px solid #E2E8F0; }
.gn__demo-retry:hover { background: #E2E8F0; }
.gn__demo-result-text {
  background: #F8FAFC; border: 1px solid #E2E8F0; border-radius: 12px;
  padding: 20px; font-size: 15px; color: #1F2937;
  line-height: 1.8; white-space: pre-wrap; margin: 0 0 16px;
}
.gn__demo-cta-text {
  font-size: 14px; color: #64748B; text-align: center;
}
.gn__demo-cta-text a {
  color: #3B82F6; font-weight: 600; text-decoration: underline;
}

@media (max-width: 380px) {
  .gn__hero { padding: 60px 16px 40px; }
  .gn__philosophy, .gn__units, .gn__tech, .gn__values, .gn__cta { padding-left: 16px; padding-right: 16px; }
  .gn__philosophy-year { min-width: 56px; font-size: 24px; }
  .gn__unit-card { padding: 32px 20px 28px; }
  .gn__cta-btn { padding: 16px 28px; }
  .gn__unit-cta { padding: 12px 24px; font-size: 0.9rem; }
}

/* ── Dark Mode (html.dark) ── */
html.dark .gn { background: #121220; color: #e0e0e0; }

/* Philosophy */
html.dark .gn__philosophy { background: #16162a; }
html.dark .gn__philosophy-text { color: #ccc; }
html.dark .gn__philosophy-quote { color: #888; }
html.dark .gn__section-label { color: #888; }
html.dark .gn__section-desc { color: #999; }

/* Units (Cards) */
html.dark .gn__units { background: #121220; }
html.dark .gn__unit-card { background: #22223a; border-color: #333; box-shadow: 0 1px 3px rgba(0,0,0,0.2); }
html.dark .gn__unit-card:hover { border-color: #555; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
html.dark .gn__unit-name { color: #e0e0e0; }
html.dark .gn__unit-desc { color: #999; }

/* Values */
html.dark .gn__values { background: #16162a; }
html.dark .gn__value-number { color: #e0e0e0; }
html.dark .gn__value-label { color: #999; }

/* Technology */
html.dark .gn__tech { background: #121220; }
html.dark .gn__tech-card { background: #22223a; border-color: #333; box-shadow: 0 1px 3px rgba(0,0,0,0.2); }
html.dark .gn__tech-card:hover { border-color: #555; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
html.dark .gn__tech-title { color: #e0e0e0; }
html.dark .gn__tech-desc { color: #999; }

/* Footer */
html.dark .gn__footer { background: #16162a; border-top-color: #333; }
html.dark .gn__footer-brand { color: #e0e0e0; }
html.dark .gn__footer-links { color: #888; }
html.dark .gn__footer-info { color: #999; }
html.dark .gn__footer-info a { color: #999; }
html.dark .gn__footer-copy { color: #666; }

/* Nav (scrolled state) */
html.dark .gn__nav.gn__nav--scrolled { background: rgba(18,18,32,0.95); box-shadow: 0 1px 8px rgba(0,0,0,0.3); }
html.dark .gn__nav.gn__nav--scrolled .gn__nav-logo { color: #e0e0e0; }
html.dark .gn__nav.gn__nav--scrolled .gn__nav-user { color: #e0e0e0; }
html.dark .gn__nav.gn__nav--scrolled .gn__nav-btn { border-color: #444; color: #e0e0e0; }
html.dark .gn__nav.gn__nav--scrolled .gn__nav-btn:hover { background: #22223a; border-color: #555; }
html.dark .gn__nav.gn__nav--scrolled .gn__nav-btn--logout { color: #888; }
html.dark .gn__nav.gn__nav--scrolled .gn__nav-btn--logout:hover { color: #ccc; background: #22223a; }

/* Modals */
html.dark .pv-modal { background: #22223a; border-color: #333; }
html.dark .pv-close { background: #2a2a40; border-color: #444; color: #999; }
html.dark .pv-close:hover { background: #333; color: #e0e0e0; }
html.dark .pv-header h2 { color: #e0e0e0; }
html.dark .pv-header p { color: #999; }
html.dark .pv-field input { background: #2a2a40; border-color: #444; color: #e0e0e0; }
html.dark .pv-btn-back { background: #2a2a40; border-color: #444 !important; color: #ccc; }

html.dark .login-modal { background: #22223a; border-color: #333; }
html.dark .login-close { background: #2a2a40; border-color: #444; color: #999; }
html.dark .login-close:hover { background: #333; color: #e0e0e0; }
html.dark .login-header h2 { color: #e0e0e0; }
html.dark .login-header p { color: #999; }
html.dark .login-field input { background: #2a2a40; border-color: #444; color: #e0e0e0; }

/* Page transition */
html.dark .page-transition { background: #121220; }
html.dark .page-transition h2 { color: #e0e0e0; }

/* Demo section */
html.dark .gn__demo { background: #16162a; }
html.dark .gn__demo-card { background: #22223a; border-color: #333; }
html.dark .gn__demo-field select,
html.dark .gn__demo-field textarea { background: #2a2a40; border-color: #444; color: #e0e0e0; }
html.dark .gn__demo-result-header strong { color: #e0e0e0; }
html.dark .gn__demo-result-text { background: #2a2a40; border-color: #444; color: #ccc; }
html.dark .gn__demo-retry { background: #2a2a40; border-color: #444; color: #ccc; }
html.dark .gn__demo-cta-text { color: #999; }

/* Static theme toggle */
.gn-theme-toggle {
  position: fixed; bottom: 24px; left: 24px; z-index: 9999;
  width: 44px; height: 44px; border-radius: 50%;
  border: 2px solid #e2e8f0; background: #ffffff;
  font-size: 20px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}
.gn-theme-toggle:hover { transform: scale(1.1); }
html.dark .gn-theme-toggle { background: #22223a; border-color: #444; box-shadow: 0 2px 8px rgba(0,0,0,0.4); }