/* ============================================================
   ZincData Lab - Main Stylesheet
   Design: zinc-800 + stone-900, modern minimal dark
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Zinc palette */
  --zinc-50: #fafafa;
  --zinc-100: #f4f4f6;
  --zinc-200: #e4e4e7;
  --zinc-300: #d4d4d8;
  --zinc-400: #a1a1aa;
  --zinc-500: #71717a;
  --zinc-600: #52525b;
  --zinc-700: #3f3f46;
  --zinc-800: #27272a;
  --zinc-900: #18181b;
  --zinc-950: #09090b;

  /* Stone palette */
  --stone-50: #fafaf9;
  --stone-100: #f5f5f4;
  --stone-200: #e7e5e4;
  --stone-300: #d6d3d1;
  --stone-400: #a8a29e;
  --stone-500: #78716c;
  --stone-600: #57534e;
  --stone-700: #44403c;
  --stone-800: #292524;
  --stone-900: #1c1917;
  --stone-950: #0c0a09;

  /* Semantic */
  --color-bg-primary: #1c1917;
  --color-bg-secondary: #27272a;
  --color-bg-tertiary: #292524;
  --color-bg-card: #27272a;
  --color-bg-card-hover: #3f3f46;
  --color-border: #3f3f46;
  --color-border-light: #52525b;
  --color-text-primary: #fafafa;
  --color-text-secondary: #d4d4d8;
  --color-text-muted: #71717a;
  --color-accent: #a1a1aa;
  --color-accent-hover: #d4d4d8;
  --color-success: #4ade80;
  --color-warning: #fbbf24;
  --color-danger: #f87171;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --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;

  /* 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;

  /* Borders & Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.5);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

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

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(28, 25, 23, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base);
}

.navbar.scrolled {
  background-color: rgba(28, 25, 23, 0.95);
  border-bottom-color: var(--color-border-light);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--zinc-500), var(--stone-500));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--color-text-primary);
}

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

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

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

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- 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-lg);
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-card);
  border-color: var(--color-border-light);
  color: var(--color-text-primary);
}

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

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.3) saturate(0.5);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(28, 25, 23, 0.7) 0%,
    rgba(28, 25, 23, 0.5) 50%,
    rgba(28, 25, 23, 0.95) 100%
  );
}

.hero .container {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  backdrop-filter: blur(10px);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1.1;
  margin-bottom: var(--space-6);
  letter-spacing: -0.03em;
}

.hero-title span {
  background: linear-gradient(135deg, var(--zinc-300), var(--stone-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-10);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

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

.hero-stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.hero-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: var(--space-1);
}

/* --- Features Section --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(161, 161, 170, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Stats Bar --- */
.stats-bar {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-12) 0;
}

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

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

.stat-item-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-item-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* --- Data Table Preview --- */
.data-preview {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.data-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.2);
}

.data-preview-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.data-preview-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-success);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
  background: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid var(--color-border);
}

.data-table td {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  font-variant-numeric: tabular-nums;
}

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

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.data-table .trend-up {
  color: var(--color-success);
}

.data-table .trend-down {
  color: var(--color-danger);
}

/* --- Testimonials --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  border-color: var(--color-border-light);
  box-shadow: var(--shadow-md);
}

.testimonial-quote {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-border);
}

.testimonial-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.testimonial-role {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* --- CTA Section --- */
.cta-section {
  position: relative;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  margin: 0 var(--space-6);
}

.cta-section .container {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-20) var(--space-8);
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(161, 161, 170, 0.08) 0%,
    transparent 70%
  );
}

.cta-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.cta-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto var(--space-8);
}

/* --- Team Section (About Page) --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.team-card {
  text-align: center;
  padding: var(--space-8);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

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

.team-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--space-5);
  border: 3px solid var(--color-border);
}

.team-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.team-role {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.team-bio {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- About Hero --- */
.about-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  background: var(--color-bg-tertiary);
}

.about-hero .container {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
}

.about-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
  line-height: 1.15;
}

.about-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Mission & Values --- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.value-card {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-8);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.value-card:hover {
  border-color: var(--color-border-light);
}

.value-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(161, 161, 170, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.value-content h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.value-content p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

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

.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--space-8) + 8px);
  top: 4px;
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  border: 3px solid var(--color-bg-primary);
  border-radius: 50%;
}

.timeline-date {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

.timeline-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.timeline-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
}

.contact-form {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(161, 161, 170, 0.1);
}

.form-input.error,
.form-textarea.error {
  border-color: var(--color-danger);
}

.form-error-msg {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: var(--space-1);
  display: none;
}

.form-error-msg.visible {
  display: block;
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-submit {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-bg-primary);
  background: var(--color-accent);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.form-submit:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.form-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-8);
}

.form-success.visible {
  display: block;
}

.form-success-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
}

.form-success h3 {
  font-size: var(--font-size-xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.form-success p {
  color: var(--color-text-muted);
}

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

.contact-info-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: all var(--transition-base);
}

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

.contact-info-icon {
  width: 44px;
  height: 44px;
  background: rgba(161, 161, 170, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

.contact-info-content h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.contact-info-content p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-brand-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.footer-brand-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.footer-heading {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-primary);
}

/* --- 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-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* Toast Notification */
.toast {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 9999;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  transform: translateY(120px);
  opacity: 0;
  transition: all var(--transition-spring);
}

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

.toast.success { border-left: 3px solid var(--color-success); }
.toast.error { border-left: 3px solid var(--color-danger); }

/* --- Scroll to Top --- */
.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 999;
  width: 44px;
  height: 44px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  cursor: pointer;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--color-bg-card-hover);
  color: var(--color-text-primary);
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
  .features-grid,
  .testimonials-grid,
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-bar-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

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

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

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-primary);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--space-8) var(--space-6);
    gap: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-toggle {
    display: flex;
  }

  .features-grid,
  .testimonials-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: var(--space-6);
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-desc {
    font-size: var(--font-size-base);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .contact-form {
    padding: var(--space-6);
  }

  .cta-section {
    margin: 0;
    border-radius: 0;
  }
}

/* --- FAQ Accordion --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: var(--color-border-light);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.faq-item summary::after {
  content: '+';
  font-size: var(--font-size-xl);
  font-weight: 300;
  color: var(--color-accent);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.faq-item[open] summary::after {
  content: '\2212';
}

.faq-item .faq-answer {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* --- Star Ratings --- */
.stars {
  display: inline-flex;
  gap: 2px;
  margin-bottom: var(--space-3);
}

.stars i {
  color: #fbbf24;
  font-size: 0.75rem;
}

/* --- Features Grid 2x3 --- */
.features-grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .features-grid-6 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .features-grid-6 {
    grid-template-columns: 1fr;
  }
}

/* --- Print Styles --- */
@media print {
  .navbar,
  .scroll-top,
  .hero-bg,
  .hero-overlay {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .hero {
    min-height: auto;
    padding-top: 0;
  }
}
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