/* ==========================================================================
   invisiblecofounder - Design System & Stylesheet
   Executive, Deeptech, Apple-level Sophistication
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & Variables
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --bg-dark: #00071C;
  --bg-card: rgba(6, 17, 43, 0.55);
  --bg-card-hover: rgba(14, 30, 68, 0.7);
  --bg-nav: rgba(0, 7, 28, 0.75);

  --brand-primary: #6A9FF8;
  --accent-sunrise: #EFAF46;

  /* Domain Accents */
  --color-semiconductor: #6A9FF8;
  --color-photonics: #44CFFB;
  --color-quantum: #6B4EFF;
  --color-physical-ai: #00D7A7;

  /* Typography Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #A8B1C4;
  --text-muted: #64748B;

  /* Borders & Glass */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(106, 159, 248, 0.3);
  --glass-glow: rgba(106, 159, 248, 0.12);

  /* Fonts */
  --font-headline: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing & Layout */
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Selection */
::selection {
  background: rgba(106, 159, 248, 0.3);
  color: #FFFFFF;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--brand-primary);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   3. Typography & Brand Logo Rules
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* MANDATORY BRAND LOGO STYLING */
.brand-logo {
  font-family: var(--font-headline);
  font-weight: 700;
  letter-spacing: -0.03em;
  text-transform: lowercase;
  display: inline-flex;
  align-items: center;
  user-select: none;
  white-space: nowrap;
}

.brand-logo .brand-inv {
  color: #FFFFFF !important;
  -webkit-text-fill-color: #FFFFFF !important;
}

.brand-logo .brand-co {
  color: #6A9FF8 !important;
  -webkit-text-fill-color: #6A9FF8 !important;
}

.brand-logo .brand-fnd {
  color: #FFFFFF !important;
  -webkit-text-fill-color: #FFFFFF !important;
}

/* Section Headings */
.section-title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  margin-bottom: 24px;
  background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--brand-primary);
  margin-bottom: 16px;
  padding: 6px 14px;
  background: rgba(106, 159, 248, 0.08);
  border: 1px solid rgba(106, 159, 248, 0.2);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
}

.section-label::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--brand-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--brand-primary);
}

.text-secondary {
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   4. Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background 0.3s ease, backdrop-filter 0.3s ease, border 0.3s ease;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.site-logo {
  font-size: 1.35rem;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.site-logo:hover {
  opacity: 0.9;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-primary);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

.nav-link:hover::after {
  width: 100%;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background-color: var(--bg-dark);
}

/* Hero Background Layer */
.hero-bg-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center bottom;
  opacity: 0.65;
  filter: brightness(0.9) contrast(1.1);
  transform: scale(1.02);
  transition: transform 0.1s ease-out;
}

/* Overlay Gradients to integrate image into page */
.hero-bg-overlay-top {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 35%;
  background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(0, 7, 28, 0.4) 60%, transparent 100%);
  z-index: 2;
}

.hero-bg-overlay-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 40%;
  background: linear-gradient(0deg, var(--bg-dark) 0%, rgba(0, 7, 28, 0.8) 50%, transparent 100%);
  z-index: 2;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: none;
  opacity: 0.85;
}

/* Hero Content */
.hero-content {
  position: relative;
  z-index: 10;
  max-width: 900px;
  text-align: center;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(3rem, 6vw, 4.75rem);
  font-weight: 800;
  line-height: 1.08;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
  background: linear-gradient(180deg, #FFFFFF 0%, #E2E8F0 60%, #94A3B8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.hero-subheadline {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 400;
  color: #EFAF46;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero-body {
  font-size: clamp(1.0625rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 40px;
  line-height: 1.7;
  font-weight: 300;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  background: var(--brand-primary);
  color: #00071C;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 20px rgba(106, 159, 248, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #7FB0FF;
  box-shadow: 0 8px 30px rgba(106, 159, 248, 0.5);
}

.btn-secondary-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  padding: 16px 24px;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.btn-secondary-link:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

.btn-secondary-link svg {
  transition: transform var(--transition-fast);
}

.btn-secondary-link:hover svg {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   6. Section 2: Why invisiblecofounder
   -------------------------------------------------------------------------- */
.why-section {
  padding: 140px 0;
  position: relative;
  background: radial-gradient(circle at 80% 20%, rgba(106, 159, 248, 0.05) 0%, transparent 50%);
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 60px;
  align-items: start;
}

.why-left {
  position: sticky;
  top: 120px;
}

.why-statement {
  font-size: clamp(1.5rem, 2.5vw, 2.125rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}

.why-card-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.why-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 32px;
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.why-item-card:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.why-item-card p {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.7;
  font-weight: 300;
}

.why-highlight-box {
  margin-top: 32px;
  padding: 24px 32px;
  background: linear-gradient(135deg, rgba(106, 159, 248, 0.1) 0%, rgba(239, 175, 70, 0.08) 100%);
  border-left: 3px solid var(--brand-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.why-highlight-box p {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   7. Section 3: Who We Help
   -------------------------------------------------------------------------- */
.who-section {
  padding: 120px 0;
  position: relative;
}

.who-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.who-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.who-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--brand-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.who-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: 0 20px 40px rgba(0, 7, 28, 0.6), 0 0 30px rgba(106, 159, 248, 0.1);
}

.who-card:hover::before {
  opacity: 1;
}

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

.who-card-title {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--text-primary);
}

.who-card-num {
  font-family: var(--font-headline);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--brand-primary);
  opacity: 0.6;
  padding: 4px 10px;
  border: 1px solid rgba(106, 159, 248, 0.3);
  border-radius: var(--radius-pill);
}

.who-card-text {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.65;
  font-weight: 300;
}

/* --------------------------------------------------------------------------
   8. Section 4: Focus Areas
   -------------------------------------------------------------------------- */
.focus-section {
  padding: 120px 0;
  position: relative;
  background: radial-gradient(ellipse at 50% 50%, rgba(11, 25, 58, 0.5) 0%, var(--bg-dark) 70%);
}

.focus-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 48px;
}

.focus-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  overflow: hidden;
}

/* Colored Left Accent Line */
.focus-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-color, var(--brand-primary));
  transition: width var(--transition-normal);
}

.focus-card:hover {
  transform: translateX(8px);
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.focus-card:hover::before {
  width: 6px;
  box-shadow: 0 0 15px var(--accent-color);
}

.focus-card[data-domain="semiconductors"] { --accent-color: var(--color-semiconductor); }
.focus-card[data-domain="photonics"] { --accent-color: var(--color-photonics); }
.focus-card[data-domain="quantum"] { --accent-color: var(--color-quantum); }
.focus-card[data-domain="physical-ai"] { --accent-color: var(--color-physical-ai); }

.focus-info {
  display: flex;
  align-items: center;
  gap: 24px;
}

.focus-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  flex-shrink: 0;
}

.focus-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.focus-tag {
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--text-secondary);
  opacity: 0.95;
  max-width: 460px;
  text-align: right;
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   9. Section 5: Our Experience
   -------------------------------------------------------------------------- */
.experience-section {
  padding: 140px 0;
  position: relative;
}

.exp-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 60px;
}

.exp-left {
  position: sticky;
  top: 120px;
}

.exp-intro {
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  color: var(--text-secondary);
  line-height: 1.65;
  font-weight: 300;
  margin-top: 16px;
}

.exp-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.exp-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.exp-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.exp-bullet {
  width: 8px;
  height: 8px;
  background: var(--brand-primary);
  border-radius: 50%;
  margin-top: 8px;
  box-shadow: 0 0 10px var(--brand-primary);
  flex-shrink: 0;
}

.exp-card p {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.exp-outro-box {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 44px 48px;
  background: linear-gradient(180deg, rgba(6, 17, 43, 0.6) 0%, rgba(106, 159, 248, 0.05) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
}

.exp-outro-text {
  font-size: clamp(1.35rem, 2.3vw, 1.875rem);
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.45;
  text-align: center;
}

.exp-outro-text .highlight-tech {
  color: #FFFFFF;
  font-weight: 700;
}

.exp-outro-text .highlight-outcomes {
  color: #F4C15D;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   10. Section 6: Why "Invisible Cofounder"?
   -------------------------------------------------------------------------- */
.invisible-section {
  padding: 160px 0;
  position: relative;
  background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(14, 25, 55, 0.8) 50%, var(--bg-dark) 100%);
  overflow: hidden;
}

/* Soft Golden Glow Backdrop */
.sunrise-glow-backdrop {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse at center, rgba(239, 175, 70, 0.15) 0%, rgba(106, 159, 248, 0.08) 40%, transparent 75%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 1;
}

.invisible-content {
  position: relative;
  z-index: 5;
  max-width: 840px;
  margin: 0 auto;
  text-align: center;
}

.invisible-title {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 32px;
}

.invisible-lead {
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  font-weight: 500;
  color: var(--accent-sunrise);
  margin-bottom: 24px;
  line-height: 1.35;
}

.invisible-body {
  font-size: clamp(1.125rem, 1.8vw, 1.3rem);
  color: var(--text-secondary);
  line-height: 1.75;
  font-weight: 300;
}

/* --------------------------------------------------------------------------
   11. Final CTA Section
   -------------------------------------------------------------------------- */
.cta-section {
  padding: 140px 0 120px;
  position: relative;
}

.cta-container {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.cta-headline {
  font-size: clamp(2.5rem, 4.5vw, 3.75rem);
  font-weight: 800;
  margin-bottom: 24px;
  line-height: 1.15;
  background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cta-dev-tag {
  display: inline-block;
  font-size: 0.9375rem;
  color: var(--accent-sunrise);
  background: rgba(239, 175, 70, 0.1);
  border: 1px solid rgba(239, 175, 70, 0.25);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
  font-weight: 500;
}

.cta-subtext {
  font-size: clamp(1.125rem, 1.8vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 56px;
  line-height: 1.65;
  font-weight: 300;
}

/* Executive Contact Card */
.contact-card {
  background: linear-gradient(135deg, rgba(8, 22, 53, 0.8) 0%, rgba(3, 11, 32, 0.9) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 560px;
  margin: 0 auto;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(106, 159, 248, 0.1);
  backdrop-filter: blur(16px);
  text-align: center;
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-primary);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.6), 0 0 50px rgba(106, 159, 248, 0.2);
}

.contact-name {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.contact-role {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.contact-email-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: rgba(106, 159, 248, 0.12);
  border: 1px solid rgba(106, 159, 248, 0.35);
  border-radius: var(--radius-pill);
  color: var(--brand-primary);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.contact-actions-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.contact-email-btn:hover {
  background: var(--brand-primary);
  color: #00071C;
  border-color: var(--brand-primary);
  box-shadow: 0 6px 20px rgba(106, 159, 248, 0.4);
}

.contact-linkedin-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: rgba(106, 159, 248, 0.08);
  border: 1px solid rgba(106, 159, 248, 0.25);
  border-radius: var(--radius-pill);
  color: var(--brand-primary);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.contact-linkedin-btn:hover {
  background: rgba(106, 159, 248, 0.2);
  color: #FFFFFF;
  border-color: var(--brand-primary);
  box-shadow: 0 6px 20px rgba(106, 159, 248, 0.35);
  transform: translateY(-2px);
}

/* Toast notification */
.toast-notice {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--bg-card);
  border: 1px solid var(--brand-primary);
  color: #FFFFFF;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  z-index: 2000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

.toast-notice.show {
  transform: translateY(0);
  opacity: 1;
}

/* --------------------------------------------------------------------------
   12. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--bg-dark);
  padding: 48px 0;
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 10;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-domains {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.footer-domain-dot {
  color: var(--text-muted);
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  justify-content: center;
}

/* --------------------------------------------------------------------------
   13. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .why-grid, .exp-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .why-left, .exp-left {
    position: static;
  }
  .exp-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 70px;
  }
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 32px 0;
    gap: 24px;
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }
  .nav-menu.active {
    transform: translateY(0);
  }
  .mobile-toggle {
    display: block;
  }
  .who-grid {
    grid-template-columns: 1fr;
  }
  .exp-grid {
    grid-template-columns: 1fr;
  }
  .focus-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
  }
  .contact-card {
    padding: 32px 20px;
  }
}

/* Scroll Reveal Utility */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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