/*==================================================================
  AUTO CONTROLE - HIGH-END VISUAL DESIGN SYSTEM
  Architecture: Vanguard UI (Awwwards-Tier / Linear-Grade)
  Typography: Sora (Geometric Display & High-Legibility Body)
  Brand Tokens: RoyalBlue #4169E1, Alloy Copper #D97757, Dark #32343E
  Physics: Custom Cubic-Bezier Fluid Interpolation
==================================================================*/

:root {
  /* Brand Tokens (Official brand-style) */
  --color-dark: #32343E;
  --color-dark-surface: #262830;
  --color-light: #F8F9FA;
  --color-light-subtle: #F1F4F9;
  --color-medium-titanium: #64748B;
  --color-light-titanium: #94A3B8;
  --color-royal-blue: #4169E1;
  --color-royal-blue-hover: #3154C4;
  --color-royal-blue-glow: rgba(65, 105, 225, 0.28);
  --color-alloy-copper: #D97757;
  --color-alloy-copper-hover: #C06446;
  --color-alloy-copper-glow: rgba(217, 119, 87, 0.22);
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;
  --color-border-subtle: #EDF2F7;
  --color-success: #16A34A;
  --color-card-bg: #FFFFFF;

  /* Typography: SORA */
  --font-heading: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Fluid Motion Curves */
  --ease-fluid: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.15);

  /* Diffused Multi-Layer Ambient Shadows (Zero harsh gray) */
  --shadow-ambient: 0 1px 2px rgba(50, 52, 62, 0.03);
  --shadow-card: 0 2px 4px rgba(50, 52, 62, 0.03), 0 12px 28px -4px rgba(50, 52, 62, 0.06);
  --shadow-card-hover: 0 8px 16px rgba(50, 52, 62, 0.04), 0 24px 48px -6px rgba(50, 52, 62, 0.1);
  --shadow-phone: 0 30px 70px -15px rgba(50, 52, 62, 0.26), 0 12px 30px -6px rgba(50, 52, 62, 0.12);
  --shadow-island: 0 16px 36px -6px rgba(50, 52, 62, 0.09), 0 2px 8px rgba(50, 52, 62, 0.04);
  --shadow-btn: 0 4px 16px 0 rgba(65, 105, 225, 0.35);
  --shadow-btn-hover: 0 8px 26px 0 rgba(65, 105, 225, 0.46);

  /* Double-Bezel Radii (Concentric nested geometry) */
  --radius-shell: 28px;
  --radius-core: calc(28px - 6px); /* 22px */
  --radius-shell-sm: 20px;
  --radius-core-sm: calc(20px - 5px); /* 15px */
  --radius-pill: 9999px;

  /* Macro-Whitespace Scale */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.85rem;
  --space-md: 1.5rem;
  --space-lg: 2.25rem;
  --space-xl: 3.5rem;
  --space-2xl: 5.5rem;
  --space-3xl: 7.5rem;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-dark);
  background-color: var(--color-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 100% 0%, rgba(65, 105, 225, 0.05) 0px, transparent 50%),
    radial-gradient(at 0% 50%, rgba(217, 119, 87, 0.04) 0px, transparent 45%);
  background-attachment: fixed;
}

/* Typography Hierarchy (Sora Precision) */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.12;
}

h2 {
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.18;
}

h3 {
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  line-height: 1.3;
}

h4 {
  font-size: 1.1rem;
  line-height: 1.4;
}

p {
  color: var(--color-medium-titanium);
  font-size: 1.0625rem;
  line-height: 1.7;
}

a {
  text-decoration: none;
  color: var(--color-royal-blue);
  transition: color 0.2s var(--ease-fluid);
}

a:hover {
  color: var(--color-royal-blue-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container & Layout Utilities */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-center { text-align: center; }

/* Micro Eyebrow Badges */
.eyebrow-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.95rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(217, 119, 87, 0.3);
  color: var(--color-alloy-copper);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  box-shadow: 0 2px 10px rgba(217, 119, 87, 0.1);
}

.eyebrow-pill.blue {
  border-color: rgba(65, 105, 225, 0.3);
  color: var(--color-royal-blue);
  box-shadow: 0 2px 10px rgba(65, 105, 225, 0.1);
}

/* ==================================================================
   HAPTIC MICRO-AESTHETICS: THE "DOUBLE-BEZEL" (DOPPELRAND)
================================================================== */
.bezel-shell {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-shell);
  padding: 6px;
  box-shadow: var(--shadow-card);
  transition: transform 0.4s var(--ease-fluid), box-shadow 0.4s var(--ease-fluid), border-color 0.3s var(--ease-fluid);
  position: relative;
}

.bezel-core {
  background: var(--color-white);
  border-radius: var(--radius-core);
  border: 1px solid rgba(241, 245, 249, 0.9);
  padding: 2.25rem;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.95), 0 1px 2px rgba(50, 52, 62, 0.02);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.bezel-shell:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(65, 105, 225, 0.35);
}

/* ==================================================================
   NESTED CTA & "BUTTON-IN-BUTTON" ARCHITECTURE
================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  transition: transform 0.25s var(--ease-fluid), box-shadow 0.3s var(--ease-fluid), background-color 0.2s ease, border-color 0.2s ease;
}

/* The High-End Button-in-Button Trailing Icon Pill */
.btn-island {
  border-radius: var(--radius-pill);
  padding: 0.42rem 0.5rem 0.42rem 1.75rem;
  gap: 0.9rem;
  background-color: var(--color-royal-blue);
  color: var(--color-white);
  box-shadow: var(--shadow-btn);
  font-size: 1rem;
}

.btn-island .btn-label {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.btn-island .btn-icon-circle {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  flex-shrink: 0;
  transition: transform 0.35s var(--ease-spring), background-color 0.2s ease;
}

.btn-island:hover {
  background-color: var(--color-royal-blue-hover);
  box-shadow: var(--shadow-btn-hover);
  transform: translateY(-2px);
  color: var(--color-white);
}

.btn-island:hover .btn-icon-circle {
  transform: translateX(3px) scale(1.06);
  background: rgba(255, 255, 255, 0.28);
}

.btn-island:active {
  transform: scale(0.98);
}

.btn-outline-island {
  border-radius: var(--radius-pill);
  padding: 0.85rem 1.85rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  color: var(--color-dark);
  font-size: 1rem;
  box-shadow: var(--shadow-ambient);
}

.btn-outline-island:hover {
  border-color: var(--color-royal-blue);
  color: var(--color-royal-blue);
  background: #FFFFFF;
  transform: translateY(-2px);
}

.btn-outline-island:active {
  transform: scale(0.98);
}

/* Secondary Button for Nav & Compact */
.btn-nav-compact {
  border-radius: var(--radius-pill);
  padding: 0.55rem 1.3rem;
  font-size: 0.875rem;
  background-color: var(--color-royal-blue);
  color: var(--color-white);
  box-shadow: 0 2px 10px rgba(65, 105, 225, 0.3);
}

.btn-nav-compact:hover {
  background-color: var(--color-royal-blue-hover);
  transform: translateY(-1px);
  color: var(--color-white);
}

.btn-nav-compact:active {
  transform: scale(0.97);
}

/* ==================================================================
   THE "FLUID ISLAND" DETACHED NAVBAR
================================================================== */
.header-wrap {
  position: sticky;
  top: 1.15rem;
  z-index: 1000;
  width: 100%;
  padding: 0 1rem;
  pointer-events: none; /* allows clicking past margins */
}

.header-island {
  pointer-events: auto;
  max-width: 1060px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-pill);
  padding: 0.65rem 1.4rem;
  box-shadow: var(--shadow-island);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: box-shadow 0.3s var(--ease-fluid), background-color 0.3s var(--ease-fluid);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.logo-img {
  height: 36px;
  width: auto;
}

/* ==================================================================
   HERO SECTION & DOUBLE-BEZEL SMARTPHONE MOCKUP
================================================================== */
.hero {
  padding: clamp(3.5rem, 6vw, 6rem) 0 clamp(3.5rem, 6vw, 5.5rem);
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

@media (min-width: 992px) {
  .hero-content {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-xl);
  }
}

.hero-text {
  max-width: 600px;
}

.hero-text h1 {
  margin-bottom: var(--space-md);
  color: var(--color-dark);
}

.hero-text h1 span {
  color: var(--color-royal-blue);
  position: relative;
  display: inline-block;
}

.hero-text p {
  font-size: 1.18rem;
  margin-bottom: var(--space-xl);
  color: var(--color-medium-titanium);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

@media (min-width: 576px) {
  .hero-actions {
    flex-direction: row;
    align-items: center;
  }
}

/* Machined Smartphone Bezel Frame */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-double-bezel {
  background: rgba(50, 52, 62, 0.08);
  border: 1px solid rgba(50, 52, 62, 0.12);
  border-radius: 48px;
  padding: 8px;
  box-shadow: var(--shadow-phone);
  position: relative;
}

.phone-hardware-core {
  width: 285px;
  background: #1F2128;
  border-radius: 40px;
  padding: 9px;
  border: 3px solid #3B3E4A;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.2);
  position: relative;
}

.phone-speaker-bar {
  width: 65px;
  height: 4px;
  background-color: #121316;
  border-radius: 4px;
  position: absolute;
  top: 15px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

.phone-screen-glass {
  border-radius: 31px;
  overflow: hidden;
  background-color: #000;
  aspect-ratio: 1080 / 2460;
  position: relative;
}

.phone-screen-glass img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Floating Haptic Metric Chips */
.floating-chip {
  position: absolute;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-shell-sm);
  padding: 0.85rem 1.15rem;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.9), 0 16px 36px -6px rgba(50, 52, 62, 0.14);
  border: 1px solid rgba(226, 232, 240, 0.9);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  z-index: 20;
  animation: floatHaptic 5s var(--ease-fluid) infinite alternate;
}

.chip-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chip-icon.blue {
  background-color: rgba(65, 105, 225, 0.12);
  color: var(--color-royal-blue);
}

.chip-icon.copper {
  background-color: rgba(217, 119, 87, 0.14);
  color: var(--color-alloy-copper);
}

.chip-text {
  display: flex;
  flex-direction: column;
}

.chip-label {
  font-size: 0.72rem;
  color: var(--color-medium-titanium);
  font-weight: 600;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.chip-value {
  font-size: 0.98rem;
  color: var(--color-dark);
  font-weight: 700;
  line-height: 1.3;
}

.chip-top-right {
  top: 12%;
  right: -30px;
}

.chip-bottom-left {
  bottom: 14%;
  left: -30px;
  animation-delay: -2.5s;
}

@keyframes floatHaptic {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-10px); }
}

@media (max-width: 768px) {
  .floating-chip {
    display: none;
  }
}

/* ==================================================================
   TRUST STRIP (SOCIAL PROOF)
================================================================== */
.trust-strip {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(226, 232, 240, 0.85);
  border-bottom: 1px solid rgba(226, 232, 240, 0.85);
  padding: 1.5rem 0;
}

.trust-strip-items {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
  justify-content: center;
}

@media (min-width: 640px) {
  .trust-strip-items {
    grid-template-columns: repeat(3, 1fr);
  }
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  justify-content: center;
}

.trust-icon-box {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-pill);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 6px rgba(50, 52, 62, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-royal-blue);
  flex-shrink: 0;
}

.trust-icon-box.star {
  color: #EAB308;
  background-color: #FEFCE8;
  border-color: #FEF08A;
}

.trust-info {
  display: flex;
  flex-direction: column;
}

.trust-title {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-dark);
  line-height: 1.25;
}

.trust-desc {
  font-size: 0.8rem;
  color: var(--color-medium-titanium);
  line-height: 1.2;
}

/* ==================================================================
   SECTION & SPATIAL RHYTHM
================================================================== */
.section {
  padding: clamp(4.5rem, 8vw, 7rem) 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto clamp(2.5rem, 5vw, 4.5rem);
}

.section-header h2 {
  margin-bottom: 0.95rem;
}

.section-header p {
  font-size: 1.15rem;
}

/* ==================================================================
   BENTO GRID (VARIANCE & DOPPELRAND ARCHITECTURE)
================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 992px) {
  .bento-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .bento-col-2 {
    grid-column: span 2;
  }
  
  .bento-col-1 {
    grid-column: span 1;
  }
}

.bento-icon-wrap {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background-color: rgba(65, 105, 225, 0.08);
  color: var(--color-royal-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(65, 105, 225, 0.15);
}

.bento-icon-wrap.copper {
  background-color: rgba(217, 119, 87, 0.09);
  color: var(--color-alloy-copper);
  border-color: rgba(217, 119, 87, 0.18);
}

.bento-core h3 {
  margin-bottom: 0.75rem;
  color: var(--color-dark);
}

.bento-core p {
  font-size: 1rem;
  margin: 0;
  line-height: 1.65;
}

/* Machined Calc Mini Simulator */
.calc-preview-box {
  background: var(--color-light);
  border-radius: var(--radius-core-sm);
  border: 1px solid var(--color-border);
  padding: 1.4rem;
  margin-top: 1.75rem;
  box-shadow: inset 0 1px 2px rgba(50, 52, 62, 0.03);
}

.calc-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--color-medium-titanium);
}

.calc-row.highlight {
  border-top: 1px dashed var(--color-border);
  margin-top: 0.65rem;
  padding-top: 0.85rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-success);
}

.calc-badge {
  background-color: rgba(22, 163, 74, 0.12);
  color: var(--color-success);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

/* ==================================================================
   REAL SCREENS SHOWCASE (TRIPLE DOUBLE-BEZEL DISPLAY)
================================================================== */
.screens-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: var(--space-xl);
}

@media (min-width: 768px) {
  .screens-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.screen-card-shell {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-shell);
  padding: 7px;
  box-shadow: var(--shadow-card);
  transition: transform 0.4s var(--ease-fluid), box-shadow 0.4s var(--ease-fluid);
}

.screen-card-core {
  background: #FFFFFF;
  border-radius: var(--radius-core);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.95);
  height: 100%;
}

.screen-card-shell:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(65, 105, 225, 0.3);
}

.screen-mini-bezel {
  width: 100%;
  max-width: 255px;
  background: #1E2027;
  border-radius: 34px;
  padding: 7px;
  border: 3px solid #3C3E48;
  box-shadow: 0 16px 36px -6px rgba(50, 52, 62, 0.2);
  margin-bottom: 1.6rem;
}

.screen-mini-glass {
  border-radius: 27px;
  overflow: hidden;
  aspect-ratio: 1080 / 2460;
  background-color: #000;
}

.screen-mini-glass img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.screen-card-core h3 {
  font-size: 1.22rem;
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

.screen-card-core p {
  font-size: 0.94rem;
  color: var(--color-medium-titanium);
  margin: 0;
  line-height: 1.6;
}

/* ==================================================================
   AUDIENCE & PERSONAS
================================================================== */
.personas-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .personas-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.persona-shell {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-shell);
  padding: 6px;
  box-shadow: var(--shadow-card);
  transition: transform 0.35s var(--ease-fluid), box-shadow 0.35s var(--ease-fluid);
}

.persona-core {
  background: #FFFFFF;
  border-radius: var(--radius-core);
  padding: 2.25rem;
  position: relative;
  overflow: hidden;
}

.persona-core::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--color-alloy-copper);
}

.persona-shell:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.persona-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.persona-icon-box {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background-color: rgba(217, 119, 87, 0.1);
  color: var(--color-alloy-copper);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(217, 119, 87, 0.2);
}

.persona-core h3 {
  color: var(--color-dark);
}

.persona-list {
  list-style: none;
}

.persona-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 0.95rem;
  color: var(--color-medium-titanium);
  font-size: 1rem;
  line-height: 1.55;
}

.persona-list li svg {
  position: absolute;
  left: 0;
  top: 4px;
  color: var(--color-alloy-copper);
}

/* ==================================================================
   FAQ (ACCORDION WITH FLUID EXPANSION)
================================================================== */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-shell {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-shell-sm);
  padding: 4px;
  box-shadow: var(--shadow-ambient);
  transition: border-color 0.25s var(--ease-fluid), box-shadow 0.25s var(--ease-fluid);
}

.faq-shell:hover {
  border-color: rgba(65, 105, 225, 0.35);
  box-shadow: var(--shadow-card);
}

.faq-item {
  background-color: #FFFFFF;
  border-radius: var(--radius-core-sm);
  overflow: hidden;
}

.faq-item summary {
  padding: 1.35rem 1.6rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-chevron {
  width: 22px;
  height: 22px;
  color: var(--color-royal-blue);
  transition: transform 0.35s var(--ease-spring);
  flex-shrink: 0;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.6rem 1.35rem;
  color: var(--color-medium-titanium);
  font-size: 1rem;
  line-height: 1.7;
  border-top: 1px solid var(--color-border-subtle);
  margin-top: -0.25rem;
  padding-top: 0.95rem;
}

/* ==================================================================
   FINAL CTA (HIGH-END GRADIENT COLD LUXURY SURFACE)
================================================================== */
.cta-section {
  padding: clamp(5rem, 8vw, 7.5rem) 0;
  background: linear-gradient(150deg, #1E222D 0%, #111319 100%);
  color: var(--color-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 550px;
  background: radial-gradient(circle, rgba(65, 105, 225, 0.28) 0%, transparent 65%);
  pointer-events: none;
}

.cta-box {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
}

.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.95rem;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #E2E8F0;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-section p {
  color: #CBD5E1;
  font-size: 1.2rem;
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.btn-white-island {
  border-radius: var(--radius-pill);
  padding: 0.45rem 0.55rem 0.45rem 1.85rem;
  gap: 0.9rem;
  background-color: var(--color-white);
  color: var(--color-dark);
  font-size: 1.05rem;
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.btn-white-island .btn-icon-circle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  background: var(--color-royal-blue);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s var(--ease-spring);
}

.btn-white-island:hover {
  background-color: var(--color-light);
  transform: translateY(-2px);
  color: var(--color-royal-blue);
}

.btn-white-island:hover .btn-icon-circle {
  transform: translateX(3px) scale(1.06);
}

.btn-white-island:active {
  transform: scale(0.98);
}

.cta-trust-items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  color: #94A3B8;
  font-size: 0.88rem;
  flex-wrap: wrap;
}

.cta-trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==================================================================
   FOOTER (GROUNDING DARK ANCHOR)
================================================================== */
.footer {
  background-color: #0B0E14;
  color: #94A3B8;
  padding: var(--space-2xl) 0 var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand .logo-container {
  margin-bottom: 1.15rem;
}

.footer-brand p {
  color: #94A3B8;
  font-size: 0.94rem;
  line-height: 1.65;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.96rem;
  margin-bottom: 1.15rem;
  letter-spacing: 0.03em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.94rem;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 1.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: #64748B;
}

/* ==================================================================
   SCROLL ENTRY CHOREOGRAPHY (INTERPOLATION)
================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease-fluid), transform 0.75s var(--ease-fluid);
  will-change: opacity, transform;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==================================================================
   GEO & METROLOGY (AEO / CITATION OPTIMIZATION)
================================================================== */
.geo-bluf-box {
  background: rgba(65, 105, 225, 0.04);
  border: 1px solid rgba(65, 105, 225, 0.18);
  border-radius: var(--radius-shell);
  padding: 1.75rem 2rem;
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.geo-bluf-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-royal-blue);
}

.geo-bluf-box p {
  color: var(--color-dark);
  font-size: 1.08rem;
  line-height: 1.65;
  margin: 0;
}

.geo-formulas-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .geo-formulas-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.geo-formula-card {
  background: var(--color-white);
  border-radius: var(--radius-core);
  padding: 1.75rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.geo-formula-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.geo-formula-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--color-dark);
}

.geo-formula-equation {
  background: var(--color-light);
  border-left: 3px solid var(--color-royal-blue);
  padding: 0.85rem 1rem;
  border-radius: 0 var(--radius-core-sm) var(--radius-core-sm) 0;
  font-family: monospace;
  font-size: 0.92rem;
  color: var(--color-dark);
  font-weight: 600;
  margin-bottom: 0.85rem;
  overflow-x: auto;
}

.geo-formula-equation.copper {
  border-left-color: var(--color-alloy-copper);
}

.geo-formula-desc {
  font-size: 0.92rem;
  color: var(--color-medium-titanium);
  line-height: 1.55;
  margin: 0;
}

/* Stats Callouts */
.geo-stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .geo-stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.geo-stat-card {
  background: #FFFFFF;
  border-radius: var(--radius-core);
  border: 1px solid var(--color-border);
  padding: 1.6rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  box-shadow: var(--shadow-ambient);
}

.geo-stat-number {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-royal-blue);
  flex-shrink: 0;
}

.geo-stat-number.copper {
  color: var(--color-alloy-copper);
}

.geo-stat-info h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--color-dark);
}

.geo-stat-info p {
  font-size: 0.9rem;
  color: var(--color-medium-titanium);
  margin: 0;
  line-height: 1.5;
}

/* Structured Comparison Table */
.geo-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: #FFFFFF;
  border-radius: var(--radius-core);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.geo-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 620px;
}

.geo-table th,
.geo-table td {
  padding: 1.15rem 1.4rem;
  border-bottom: 1px solid var(--color-border-subtle);
  font-size: 0.95rem;
}

.geo-table th {
  background: var(--color-light);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.geo-table th:nth-child(2) {
  color: #DC2626;
  background: #FEF2F2;
}

.geo-table th:nth-child(3) {
  color: var(--color-royal-blue);
  background: #EFF6FF;
}

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

.geo-table tr:hover td {
  background: rgba(248, 249, 250, 0.7);
}

.table-tag {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.35rem;
}

.table-tag.danger {
  background: #FEE2E2;
  color: #DC2626;
}

.table-tag.success {
  background: #DCFCE7;
  color: #16A34A;
}

/* Accessibility: Focus visible and Reduced Motion */
:focus-visible {
  outline: 2px solid var(--color-royal-blue);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }
}