/* ============================================
   StackMind AI Technologies — Design System
   ============================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  /* Colors */
  --color-bg: #FAFAFA;
  --color-white: #FFFFFF;
  --color-primary: #0D9488;
  --color-primary-light: #CCFBF1;
  --color-primary-dark: #0F766E;
  --color-secondary: #4F46E5;
  --color-secondary-light: #E0E7FF;
  --color-text: #1A1A2E;
  --color-text-secondary: #64748B;
  --color-text-light: #94A3B8;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  --color-success: #10B981;
  --color-error: #EF4444;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  --line-height-tight: 1.15;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  line-height: var(--line-height-tight);
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: var(--font-size-5xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-4xl); letter-spacing: -0.01em; }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); font-weight: 600; }

p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

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

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section--sm {
  padding: var(--space-16) 0;
}

.section--lg {
  padding: var(--space-32) 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-16);
}

.section-header p {
  margin-top: var(--space-4);
  font-size: var(--font-size-lg);
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

/* --- Grid System --- */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
}

.nav-logo img {
  height: 72px;
  width: auto;
}

.nav-logo svg {
  width: 72px;
  height: 72px;
  color: var(--color-primary);
}

.nav-logo .logo-stack {
  color: var(--color-text-light);
}

.nav-logo .logo-mind {
  color: var(--color-text);
}

.nav-logo .logo-ai {
  color: var(--color-primary);
  font-size: 0.8em;
  font-weight: 600;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  margin-left: var(--space-4);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 1001;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Panel */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background: var(--color-white);
  box-shadow: var(--shadow-xl);
  padding: calc(var(--nav-height) + var(--space-8)) var(--space-8) var(--space-8);
  flex-direction: column;
  gap: var(--space-6);
  transition: right var(--transition-slow);
  z-index: 999;
}

.nav-mobile.open {
  right: 0;
}

.nav-mobile a {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast);
}

.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--color-primary);
}

.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.nav-overlay.visible {
  opacity: 1;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3);
  transform: translateY(-1px);
}

.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-white);
}

.btn--secondary:hover {
  background: #4338CA;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
  transform: translateY(-1px);
}

.btn--outline {
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
  background: var(--color-white);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn--ghost {
  color: var(--color-primary);
  padding: var(--space-2) var(--space-4);
}

.btn--ghost:hover {
  background: var(--color-primary-light);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-base);
  border-radius: var(--radius-lg);
}

.btn-group {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* --- Cards --- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.card-icon--primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.card-icon--secondary {
  background: var(--color-secondary-light);
  color: var(--color-secondary);
}

.card h3, .card h4 {
  margin-bottom: var(--space-3);
}

.card p {
  font-size: var(--font-size-sm);
}

.card ul {
  margin-top: var(--space-3);
}

.card ul li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: var(--space-1) 0;
  padding-left: var(--space-5);
  position: relative;
}

.card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  transform: translateY(-50%);
}

.card--accent-top {
  border-top: 3px solid var(--color-primary);
}

.card--accent-top-secondary {
  border-top: 3px solid var(--color-secondary);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 720px;
}

.hero h1 {
  margin-bottom: var(--space-6);
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: var(--font-size-xl);
  max-width: 600px;
  margin-bottom: var(--space-10);
}

/* Particle Canvas */
.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.4;
}

/* Page Hero (inner pages) */
.page-hero {
  padding: calc(var(--nav-height) + var(--space-20)) 0 var(--space-16);
  text-align: center;
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-bg) 100%);
}

.page-hero h1 {
  margin-bottom: var(--space-4);
}

.page-hero p {
  font-size: var(--font-size-xl);
  max-width: 640px;
  margin: 0 auto;
}

/* --- Feature Sections (alternating) --- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  padding: var(--space-16) 0;
}

.feature-row:nth-child(even) .feature-text {
  order: 2;
}

.feature-row:nth-child(even) .feature-visual {
  order: 1;
}

.feature-text h3 {
  margin-bottom: var(--space-4);
}

.feature-text p {
  margin-bottom: var(--space-6);
}

.feature-text ul li {
  padding: var(--space-2) 0;
  padding-left: var(--space-6);
  position: relative;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.feature-text ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary-light);
  border: 2px solid var(--color-primary);
}

.feature-visual {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.feature-visual svg {
  width: 100%;
  max-width: 400px;
  height: auto;
}

.feature-visual img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* Domain banner images (solutions page) */
.domain-banner-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius-lg);
  margin: 0 auto;
  display: block;
}

/* --- Stats / Impact Section --- */
.stats-section {
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.04) 0%, rgba(79, 70, 229, 0.04) 100%);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.stat-item {
  padding: var(--space-6);
}

.stat-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-4);
  color: var(--color-primary);
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* --- Logo Strip --- */
.logos-section {
  padding: var(--space-16) 0;
  text-align: center;
  overflow: hidden;
}

.logos-section p {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: var(--space-10);
}

.ticker-wrapper {
  display: flex;
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.ticker-track {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  flex-shrink: 0;
  padding-right: var(--space-12);
  animation: ticker-scroll 30s linear infinite;
}

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

.ticker-logo {
  width: 120px;
  height: 48px;
  object-fit: contain;
  filter: grayscale(100%) opacity(0.5);
  transition: filter var(--transition-fast);
  flex-shrink: 0;
}

.ticker-logo:hover {
  filter: grayscale(0%) opacity(1);
}

/* --- CTA Band --- */
.cta-band {
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.06) 0%, rgba(79, 70, 229, 0.06) 100%);
  text-align: center;
  padding: var(--space-20) 0;
}

.cta-band h2 {
  margin-bottom: var(--space-4);
}

.cta-band p {
  font-size: var(--font-size-lg);
  max-width: 500px;
  margin: 0 auto var(--space-8);
}

.cta-band .btn-group {
  justify-content: center;
}

/* --- Adoption / Side-by-Side --- */
.adopt-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.adopt-card {
  padding: var(--space-10);
}

.adopt-card .adopt-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.adopt-card--native .adopt-label {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.adopt-card--extend .adopt-label {
  background: var(--color-secondary-light);
  color: var(--color-secondary);
}

/* --- Timeline --- */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 31px;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  padding-left: 80px;
  padding-bottom: var(--space-12);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-number {
  position: absolute;
  left: 0;
  top: 0;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  z-index: 1;
}

.timeline-item h3 {
  margin-bottom: var(--space-3);
  padding-top: var(--space-4);
}

.timeline-item p {
  font-size: var(--font-size-sm);
}

/* --- Layers Diagram --- */
.layers-diagram {
  max-width: 800px;
  margin: 0 auto;
}

.layer-item {
  display: flex;
  align-items: stretch;
  margin-bottom: var(--space-2);
}

.layer-item:first-child .layer-content {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.layer-item:last-child .layer-content {
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.layer-number {
  width: 48px;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.layer-content {
  flex: 1;
  padding: var(--space-5) var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-left: none;
}

.layer-content h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-1);
}

.layer-content p {
  font-size: var(--font-size-sm);
}

/* --- Case Study Cards --- */
.case-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.case-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.case-card-visual {
  height: auto;
  min-height: 200px;
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.08), rgba(79, 70, 229, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.case-card-visual svg {
  width: 120px;
  height: 120px;
  opacity: 0.5;
}

.case-card-visual img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.case-card-body {
  padding: var(--space-8);
}

.case-card-body h3 {
  margin-bottom: var(--space-4);
}

.case-detail {
  margin-bottom: var(--space-4);
}

.case-detail-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.case-detail p {
  font-size: var(--font-size-sm);
}

/* --- Outcome / Transform Cards --- */
.outcome-card {
  text-align: center;
  padding: var(--space-8);
}

.outcome-card .outcome-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.outcome-from, .outcome-to {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.outcome-from {
  color: var(--color-text-light);
  text-decoration: line-through;
}

.outcome-to {
  color: var(--color-primary);
}

.outcome-arrow svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-12);
  align-items: start;
}

.form-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  background: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: var(--space-10);
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.checkbox-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.checkbox-item span {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.form-submit {
  width: 100%;
}

.form-message {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  display: none;
}

.form-message--success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-message--error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Contact sidebar cards */
.contact-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: border-color var(--transition-base);
}

.contact-card:hover {
  border-color: var(--color-primary);
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.contact-card h4 {
  margin-bottom: var(--space-2);
}

.contact-card p {
  font-size: var(--font-size-sm);
}

/* --- Footer --- */
.footer {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  margin-top: var(--space-3);
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.footer-col h5 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.footer-col a {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-6);
  text-align: center;
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

/* --- Solution Domain Tabs --- */
.domain-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.domain-tab {
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.domain-tab:hover,
.domain-tab.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* --- Solution Domain Section --- */
.domain-section {
  margin-bottom: var(--space-20);
}

.domain-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.domain-header-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.domain-header h2 {
  font-size: var(--font-size-2xl);
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 80ms; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 160ms; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 240ms; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 320ms; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 400ms; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* --- Tech Stack Tags --- */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.tech-tag {
  padding: var(--space-2) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-white);
}

/* --- Responsive: Tablet (768px) --- */
@media (max-width: 1024px) {
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .feature-row {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .feature-row:nth-child(even) .feature-text { order: 1; }
  .feature-row:nth-child(even) .feature-visual { order: 2; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Responsive: Mobile (480px) --- */
@media (max-width: 768px) {
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }

  .section { padding: var(--space-16) 0; }
  .section--lg { padding: var(--space-20) 0; }

  .container { padding: 0 var(--space-4); }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

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

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

  /* Show hamburger, hide desktop nav */
  .nav-hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
  }

  .nav-mobile {
    display: flex;
  }

  .nav-overlay {
    display: block;
    pointer-events: none;
  }

  .nav-overlay.visible {
    pointer-events: auto;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--space-12));
    padding-bottom: var(--space-12);
  }

  .hero p {
    font-size: var(--font-size-lg);
  }

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .ticker-logo {
    width: 80px;
    height: 32px;
  }

  .ticker-track {
    gap: var(--space-6);
    padding-right: var(--space-6);
  }

  .page-hero {
    padding-top: calc(var(--nav-height) + var(--space-12));
    padding-bottom: var(--space-10);
  }
}

/* --- Utility --- */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mt-8 { margin-top: var(--space-8); }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Loading spinner for form */
.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.btn-loading::after {
  content: '';
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: translateY(-50%) rotate(360deg); }
}

/* ============================================
   NEW COMPONENTS — Phase 2
   ============================================ */

/* --- Dropdown Navigation --- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > a {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-dropdown > a::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-left: 2px;
  transition: transform var(--transition-fast);
  position: static;
  background: none;
}

.nav-dropdown:hover > a::after {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding-top: 12px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.nav-dropdown-menu-inner {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-3);
  min-width: 200px;
}

.nav-dropdown-menu a {
  display: block;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  white-space: nowrap;
  transition: background var(--transition-fast);
}

.nav-dropdown-menu a::after {
  display: none !important;
}

.nav-dropdown-menu a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* --- Pricing Cards --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  align-items: start;
}

.pricing-card {
  background: var(--color-white);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
}

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

.pricing-card--featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card--featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-4);
  background: var(--color-primary);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 700;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pricing-card .pricing-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-5);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pricing-card h3 {
  margin-bottom: var(--space-2);
}

.pricing-card .pricing-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  min-height: 40px;
}

.pricing-card .pricing-price {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.pricing-card .pricing-period {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-6);
}

.pricing-features {
  text-align: left;
  margin-bottom: var(--space-8);
}

.pricing-features li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  padding-left: var(--space-6);
  position: relative;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.pricing-card .btn {
  width: 100%;
}

/* --- Add-on Cards --- */
.addon-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.addon-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  align-items: start;
  gap: var(--space-4);
  transition: border-color var(--transition-base);
}

.addon-card:hover {
  border-color: var(--color-primary);
}

.addon-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.addon-card h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-1);
}

.addon-card p {
  font-size: var(--font-size-sm);
}

/* --- Service Journey Cards --- */
.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.service-card-header {
  padding: var(--space-6) var(--space-8);
  background: linear-gradient(135deg, rgba(13,148,136,0.06), rgba(79,70,229,0.04));
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.service-card-header .svc-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.service-card-header h3 {
  font-size: var(--font-size-lg);
}

.service-card-body {
  padding: var(--space-6) var(--space-8);
}

.service-card-body p {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-4);
}

.service-journey {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.service-journey-step {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.service-journey-arrow {
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

/* --- Industry Grid --- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.industry-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.industry-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.industry-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.industry-card h4 {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-1);
}

.industry-card p {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

/* Industry Detail Page */
.industry-detail-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.industry-detail-header .ind-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  background: var(--color-primary-light);
}

/* --- Integrations / Powered By --- */
.integrations-section {
  padding: var(--space-16) 0;
}

.integrations-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.integration-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.integration-badge:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.integration-badge .int-icon {
  width: 30px;
  height: 30px;
  border-radius: 4px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-light);
}

.integration-badge .int-logo {
  width: 30px;
  height: 30px;
  border-radius: 4px;
  object-fit: contain;
  flex-shrink: 0;
}

/* --- Service Detail Expand --- */
.svc-detail-section {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.svc-detail-section:last-of-type {
  border-bottom: none;
}

/* --- Footer extended columns --- */
.footer-grid-extended {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

/* --- Responsive additions --- */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .industry-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .footer-grid-extended {
    grid-template-columns: 1fr 1fr;
  }

  .nav-dropdown-menu {
    position: static;
    transform: none;
    padding-top: 0;
    opacity: 1;
    visibility: visible;
  }

  .nav-dropdown-menu-inner {
    box-shadow: none;
    border: none;
    padding: 0 0 0 var(--space-4);
    background: transparent;
  }
}

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

  .industry-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid-extended {
    grid-template-columns: 1fr;
  }

  .service-card-header {
    padding: var(--space-4) var(--space-5);
  }

  .service-card-body {
    padding: var(--space-4) var(--space-5);
  }

  .service-journey {
    flex-direction: column;
    align-items: flex-start;
  }

  .service-journey-arrow {
    transform: rotate(90deg);
  }
}

/* --- Hero & Page-Hero Background Images --- */
.hero--with-bg {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero--with-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(250, 250, 250, 0.75);
  z-index: 1;
}

.page-hero--with-bg {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
}

.page-hero--with-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.85) 0%, rgba(250,250,250,0.9) 100%);
  z-index: 0;
}

.page-hero--with-bg .container {
  position: relative;
  z-index: 1;
}

/* --- Image captions via figcaption --- */
.img-figure {
  margin: 0;
  text-align: center;
}

.img-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.img-figure figcaption {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin-top: var(--space-2);
  font-style: italic;
}

/* --- Service Card: Side-by-side image + text layout --- */
.service-card-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.service-card-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.service-card-visual img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.service-card:nth-child(even) .service-card-content .service-card-visual {
  order: -1;
}

/* --- Industry Detail: Side-by-side image + content layout --- */
.industry-detail-layout {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: var(--space-8);
  align-items: start;
}

.industry-detail-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.industry-detail-visual img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.svc-detail-section:nth-child(even) .industry-detail-layout {
  grid-template-columns: 3fr 2fr;
}

.svc-detail-section:nth-child(even) .industry-detail-layout .industry-detail-visual {
  order: 2;
}

/* Responsive: collapse to single column */
@media (max-width: 768px) {
  .service-card-content {
    grid-template-columns: 1fr;
  }

  .service-card:nth-child(even) .service-card-content .service-card-visual {
    order: 0;
  }

  .industry-detail-layout {
    grid-template-columns: 1fr;
  }

  .svc-detail-section:nth-child(even) .industry-detail-layout {
    grid-template-columns: 1fr;
  }

  .svc-detail-section:nth-child(even) .industry-detail-layout .industry-detail-visual {
    order: 0;
  }
}

/* --- Toast Notification --- */
.toast-notification {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%) translateY(-100%);
  background: var(--color-success);
  color: #fff;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-lg, 0.75rem);
  font-size: var(--font-size-sm);
  font-weight: 600;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
  z-index: 10000;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
  text-align: center;
  max-width: 90vw;
}

.toast-notification.toast-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}