/* ==========================================================================
   PSAS GROUPS GLOBAL (psasgroups.com) - Official Apple Conglomerate Design System
   Frontier AI Holding & 10 Specialized Subsidiary Ventures
   ========================================================================== */

:root {
  --apple-font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "SF Pro", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --apple-mono: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --bg-canvas: #000000;
  --bg-card: rgba(28, 28, 30, 0.68);
  --bg-card-hover: rgba(44, 44, 46, 0.85);
  
  --border-light: rgba(255, 255, 255, 0.09);
  --border-top-highlight: rgba(255, 255, 255, 0.22);
  
  --text-primary: #F5F5F7;
  --text-secondary: #86868B;
  --text-tertiary: #6E6E73;
  --text-white: #FFFFFF;
  
  --accent-holding: #2997FF;
  --accent-purple: #BF5AF2;
  --accent-green: #30D158;
  
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 980px;
  
  --spring-default: cubic-bezier(0.16, 1, 0.3, 1);
  --spring-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-canvas);
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--apple-font);
  line-height: 1.55;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ambient Keynote Soft Lights */
.holding-ambient-mesh {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1400px;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.mesh-holding-top {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 650px;
  background: radial-gradient(ellipse at center, rgba(41, 151, 255, 0.18) 0%, rgba(191, 90, 242, 0.08) 50%, transparent 75%);
  filter: blur(140px);
}

/* Sticky Apple Glass Navigation */
.holding-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(25px) saturate(190%);
  -webkit-backdrop-filter: blur(25px) saturate(190%);
  border-bottom: 1px solid var(--border-light);
  height: 58px;
  display: flex;
  align-items: center;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-holding {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-white);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s ease;
}

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

/* Apple Pill Buttons */
.btn-apple {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.015em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  user-select: none;
  transition: transform 0.2s var(--spring-default), background 0.2s ease, box-shadow 0.2s ease;
}

.btn-apple:active {
  transform: scale(0.97) !important;
}

.btn-apple-primary {
  background: var(--text-white);
  color: #000000;
  padding: 12px 26px;
}

.btn-apple-primary:hover {
  transform: scale(1.02);
  background: #F5F5F7;
  box-shadow: 0 4px 24px rgba(255, 255, 255, 0.25);
}

.btn-apple-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  padding: 12px 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-apple-secondary:hover {
  transform: scale(1.02);
  background: rgba(255, 255, 255, 0.14);
}

.btn-apple-sm {
  padding: 7px 16px;
  font-size: 13px;
}

/* Sections */
.section-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 110px 24px;
  position: relative;
  z-index: 1;
}

/* Hero Section */
.hero-holding {
  padding-top: 90px;
  padding-bottom: 70px;
  text-align: center;
}

.holding-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 24px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #2997FF;
  box-shadow: 0 0 10px #2997FF;
}

.holding-headline {
  font-size: clamp(2.8rem, 6vw, 5.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--text-white);
  max-width: 1040px;
  margin: 0 auto 24px;
}

.holding-headline .text-gradient {
  background: linear-gradient(180deg, #FFFFFF 0%, #A1A1A6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.holding-sub {
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  line-height: 1.48;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 40px;
  letter-spacing: -0.015em;
}

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

/* Keynote Metrics Deck */
.metrics-strip {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 860px) {
  .metrics-strip { grid-template-columns: 1fr 1fr; }
}

.metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  border: 1px solid var(--border-light);
  border-top: 1px solid var(--border-top-highlight);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: transform 0.25s var(--spring-default);
}

.metric-card:hover {
  transform: translateY(-3px);
}

.metric-val {
  font-size: clamp(2.4rem, 3.8vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text-white);
  line-height: 1.1;
  margin-bottom: 8px;
}

.metric-title {
  font-size: 13px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: 54px;
}

.section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #2997FF;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-white);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.5;
  letter-spacing: -0.015em;
}

/* Category Filter Bar */
.filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-tab-btn {
  background: rgba(118, 118, 128, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s var(--spring-default);
}

.filter-tab-btn:hover {
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.2);
}

.filter-tab-btn.active {
  background: rgba(255, 255, 255, 0.18);
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* 10 Subsidiaries Bento Matrix */
.ventures-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .ventures-grid { grid-template-columns: 1fr; }
}

.venture-card {
  background: var(--bg-card);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  border: 1px solid var(--border-light);
  border-top: 1px solid var(--border-top-highlight);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: transform 0.25s var(--spring-default), border-color 0.25s ease, box-shadow 0.25s ease;
}

.venture-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.6);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.venture-identity {
  display: flex;
  align-items: center;
  gap: 14px;
}

.venture-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.venture-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: -0.02em;
}

.venture-domain-pill {
  font-family: var(--apple-mono);
  font-size: 12px;
  color: var(--text-secondary);
}

.venture-kpi-badge {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: #30D158;
}

.venture-category-tag {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #2997FF;
  margin-bottom: 8px;
}

.venture-desc {
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-secondary);
  margin-bottom: 26px;
  flex-grow: 1;
}

.venture-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
}

.spec-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.15s ease;
}

.spec-btn:hover {
  color: var(--text-white);
}

/* Supercompute Nodes Section */
.cluster-panel {
  background: #111113;
  border: 1px solid var(--border-light);
  border-top: 1px solid var(--border-top-highlight);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
}

.nodes-switcher {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.node-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s var(--spring-default);
}

.node-btn:hover {
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.2);
}

.node-btn.active {
  background: rgba(41, 151, 255, 0.15);
  color: #2997FF;
  border-color: #2997FF;
}

.node-telemetry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 24px;
}

@media (max-width: 860px) {
  .node-telemetry-grid { grid-template-columns: 1fr 1fr; }
}

.node-stat-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
}

.node-stat-val {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.node-stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Synergy Pipeline Section */
.synergy-diagram {
  background: var(--bg-card);
  backdrop-filter: blur(25px);
  border: 1px solid var(--border-light);
  border-top: 1px solid var(--border-top-highlight);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.synergy-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.synergy-step {
  flex: 1;
  min-width: 220px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-md);
  padding: 24px 20px;
}

.step-num {
  font-size: 12px;
  font-weight: 600;
  color: #2997FF;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* Institutional Modal Sheet */
.holding-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--spring-default);
}

.holding-modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.holding-modal {
  background: #1C1C1E;
  border: 1px solid var(--border-light);
  border-top: 1px solid var(--border-top-highlight);
  border-radius: var(--radius-lg);
  max-width: 540px;
  width: 100%;
  padding: 36px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.8);
  transform: scale(0.95);
  transition: transform 0.25s var(--spring-default);
}

.holding-modal-overlay.open .holding-modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-white);
}

.modal-close-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: var(--text-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-white);
  font-size: 15px;
  font-family: var(--apple-font);
  outline: none;
}

.modal-input:focus {
  border-color: #2997FF;
}

/* Toast */
.apple-toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(30, 30, 32, 0.92);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
  padding: 12px 24px;
  font-size: 14px;
  color: var(--text-white);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 3000;
  transition: transform 0.3s var(--spring-bounce);
  pointer-events: none;
}

.apple-toast.show {
  transform: translateX(-50%) translateY(0);
}

/* Footer */
.holding-footer {
  border-top: 1px solid var(--border-light);
  background: #000000;
  padding: 70px 0 40px;
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

.footer-brand-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 12px;
}

.footer-brand-desc {
  line-height: 1.6;
  max-width: 320px;
  margin-bottom: 20px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}