/* ============================================================
   ATLAS PM — DESIGN SYSTEM
   Premium Minimalism | Linear/Notion Style
   ============================================================ */

/* ------------------------------------------------------------
   GOOGLE FONTS IMPORT
   ------------------------------------------------------------ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ------------------------------------------------------------
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ------------------------------------------------------------ */
:root {
  /* --- Colors: Background --- */
  --color-bg-primary:       #FFFFFF;
  --color-bg-secondary:     #F8FAFC;
  --color-bg-dark:          #0A0F1E;
  --color-bg-dark-secondary:#0F1629;
  --color-bg-dark-tertiary: #141B2D;

  /* --- Colors: Text --- */
  --color-text-primary:     #0A0F1E;
  --color-text-secondary:   #64748B;
  --color-text-muted:       #94A3B8;
  --color-text-inverse:     #FFFFFF;
  --color-text-inverse-secondary: rgba(255, 255, 255, 0.7);

  /* --- Colors: Accent --- */
  --color-accent:           #3B82F6;
  --color-accent-dark:      #1D4ED8;
  --color-accent-light:     #60A5FA;
  --color-accent-subtle:    rgba(59, 130, 246, 0.08);
  --color-accent-hover:     #2563EB;

  /* --- Colors: Semantic --- */
  --color-success:          #10B981;
  --color-success-subtle:   rgba(16, 185, 129, 0.1);
  --color-error:            #EF4444;
  --color-error-subtle:     rgba(239, 68, 68, 0.1);
  --color-warning:          #F59E0B;
  --color-warning-subtle:   rgba(245, 158, 11, 0.1);

  /* --- Colors: Border --- */
  --color-border:           #E2E8F0;
  --color-border-subtle:    #F1F5F9;
  --color-border-dark:      rgba(255, 255, 255, 0.08);

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

  /* --- Typography: Font Sizes --- */
  --text-display: 4.5rem;    /* 72px */
  --text-h1:      3.5rem;    /* 56px */
  --text-h2:      2.5rem;    /* 40px */
  --text-h3:      1.75rem;   /* 28px */
  --text-h4:      1.25rem;   /* 20px */
  --text-body-lg: 1.125rem;  /* 18px */
  --text-body:    1rem;      /* 16px */
  --text-small:   0.875rem;  /* 14px */
  --text-xs:      0.75rem;   /* 12px */

  /* --- Typography: Font Weights --- */
  --weight-light:      300;
  --weight-regular:    400;
  --weight-medium:     500;
  --weight-semibold:   600;
  --weight-bold:       700;
  --weight-extrabold:  800;

  /* --- Typography: Line Heights --- */
  --leading-tight:   1.2;
  --leading-snug:    1.35;
  --leading-normal:  1.5;
  --leading-relaxed: 1.7;

  /* --- Typography: Letter Spacing --- */
  --tracking-tight:  -0.03em;
  --tracking-snug:   -0.02em;
  --tracking-normal:  0em;
  --tracking-wide:    0.05em;
  --tracking-wider:   0.08em;
  --tracking-widest:  0.12em;

  /* --- Spacing Scale --- */
  --space-1:   0.25rem;   /* 4px */
  --space-2:   0.5rem;    /* 8px */
  --space-3:   0.75rem;   /* 12px */
  --space-4:   1rem;      /* 16px */
  --space-5:   1.25rem;   /* 20px */
  --space-6:   1.5rem;    /* 24px */
  --space-8:   2rem;      /* 32px */
  --space-10:  2.5rem;    /* 40px */
  --space-12:  3rem;      /* 48px */
  --space-16:  4rem;      /* 64px */
  --space-20:  5rem;      /* 80px */
  --space-24:  6rem;      /* 96px */
  --space-32:  8rem;      /* 128px */

  /* --- Border Radius --- */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-2xl:  24px;
  --radius-3xl:  32px;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-xs:   0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm:   0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md:   0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.05);
  --shadow-lg:   0 8px 32px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-xl:   0 16px 48px rgba(0, 0, 0, 0.12), 0 8px 20px rgba(0, 0, 0, 0.07);
  --shadow-2xl:  0 24px 64px rgba(0, 0, 0, 0.14), 0 12px 28px rgba(0, 0, 0, 0.08);
  --shadow-accent: 0 8px 32px rgba(59, 130, 246, 0.25);
  --shadow-accent-lg: 0 16px 48px rgba(59, 130, 246, 0.35);

  /* --- Transitions --- */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* --- Layout --- */
  --container-max:    1280px;
  --container-narrow: 768px;
  --container-mid:    1024px;
  --nav-height:       72px;

  /* --- Z-index Scale --- */
  --z-base:      0;
  --z-above:     10;
  --z-dropdown:  100;
  --z-sticky:    200;
  --z-fixed:     300;
  --z-overlay:   400;
  --z-modal:     500;
  --z-toast:     600;
}

/* ------------------------------------------------------------
   CSS RESET & BASE
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

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

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

ul,
ol {
  list-style: none;
}

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

/* ------------------------------------------------------------
   TYPOGRAPHY SCALE
   ------------------------------------------------------------ */
.text-display {
  font-size: var(--text-display);
  font-weight: var(--weight-extrabold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

h1, .text-h1 {
  font-size: var(--text-h1);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-snug);
}

h2, .text-h2 {
  font-size: var(--text-h2);
  font-weight: var(--weight-bold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-snug);
}

h3, .text-h3 {
  font-size: var(--text-h3);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-normal);
}

h4, .text-h4 {
  font-size: var(--text-h4);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-normal);
}

.text-body-lg {
  font-size: var(--text-body-lg);
  line-height: var(--leading-relaxed);
}

.text-body {
  font-size: var(--text-body);
  line-height: var(--leading-normal);
}

.text-small {
  font-size: var(--text-small);
  line-height: var(--leading-normal);
}

.text-xs {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

.text-mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* ------------------------------------------------------------
   LAYOUT: CONTAINER & SECTION
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container-mid {
  width: 100%;
  max-width: var(--container-mid);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

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

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

/* ------------------------------------------------------------
   GRID UTILITIES
   ------------------------------------------------------------ */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

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

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------------------------------
   NAVIGATION
   ------------------------------------------------------------ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: box-shadow var(--transition-base),
              background-color var(--transition-base);
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
  background-color: rgba(255, 255, 255, 0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-h4);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-snug);
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

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

.nav-link.active {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
}

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

/* ------------------------------------------------------------
   BUTTONS
   ------------------------------------------------------------ */

/* Base button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-lg);
  cursor: pointer;
  border: 1.5px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Button sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-small);
  border-radius: var(--radius-md);
  height: 36px;
}

.btn-md,
.btn {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-body);
  height: 44px;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-body-lg);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-xl);
  height: 56px;
}

/* Primary button */
.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
  box-shadow: 0 1px 2px rgba(59, 130, 246, 0.2),
              0 4px 12px rgba(59, 130, 246, 0.15);
}

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

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

/* Secondary button */
.btn-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-text-muted);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:active {
  transform: translateY(0);
}

/* Ghost button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

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

/* Accent outline variant */
.btn-accent-outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-accent-outline:hover {
  background-color: var(--color-accent-subtle);
  transform: translateY(-1px);
}

/* Dark / inverse button */
.btn-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  border-color: var(--color-bg-dark);
}

.btn-dark:hover {
  background-color: var(--color-bg-dark-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

/* Button: disabled state */
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
}

/* ------------------------------------------------------------
   CARDS
   ------------------------------------------------------------ */

/* Base card */
.card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base),
              transform var(--transition-base),
              border-color var(--transition-base);
}

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

/* Dark card */
.card-dark {
  background-color: var(--color-bg-dark-secondary);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  color: var(--color-text-inverse);
  transition: box-shadow var(--transition-base),
              transform var(--transition-base),
              border-color var(--transition-base);
}

.card-dark:hover {
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

.card-dark .text-secondary,
.card-dark p {
  color: var(--color-text-inverse-secondary);
}

/* Glass card */
.card-glass {
  background-color: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06),
              inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transition: box-shadow var(--transition-base),
              transform var(--transition-base);
}

.card-glass:hover {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.10),
              inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

/* Card with accent top border */
.card-accent {
  border-top: 3px solid var(--color-accent);
}

/* Feature card — flat, no hover lift */
.card-flat {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

/* Stat / metric card */
.card-stat {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-xs);
}

.card-stat .stat-number {
  font-family: var(--font-mono);
  font-size: var(--text-h2);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-2);
}

.card-stat .stat-label {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  font-weight: var(--weight-medium);
}

/* ------------------------------------------------------------
   BADGES
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-full);
  line-height: 1.5;
  white-space: nowrap;
}

/* Default badge */
.badge {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

/* Badge variants */
.badge-accent {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.badge-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  border: none;
}

.badge-success {
  background-color: var(--color-success-subtle);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-error {
  background-color: var(--color-error-subtle);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-warning {
  background-color: var(--color-warning-subtle);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-new {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: #fff;
  border: none;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

/* Badge dot indicator */
.badge-dot::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: currentColor;
  flex-shrink: 0;
}

/* ------------------------------------------------------------
   SECTION TAG (small label above headings)
   ------------------------------------------------------------ */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-tag-dark {
  color: var(--color-text-inverse-secondary);
  background-color: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

/* ------------------------------------------------------------
   TYPOGRAPHY UTILITIES
   ------------------------------------------------------------ */

/* Gradient text */
.gradient-text {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 50%, #818CF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-warm {
  background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Text color utilities */
.text-primary   { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted     { color: var(--color-text-muted); }
.text-accent    { color: var(--color-accent); }
.text-success   { color: var(--color-success); }
.text-error     { color: var(--color-error); }
.text-warning   { color: var(--color-warning); }
.text-inverse   { color: var(--color-text-inverse); }

/* Text alignment */
.text-left    { text-align: left; }
.text-center  { text-align: center; }
.text-right   { text-align: right; }

/* Text weight utilities */
.font-light     { font-weight: var(--weight-light); }
.font-regular   { font-weight: var(--weight-regular); }
.font-medium    { font-weight: var(--weight-medium); }
.font-semibold  { font-weight: var(--weight-semibold); }
.font-bold      { font-weight: var(--weight-bold); }
.font-extrabold { font-weight: var(--weight-extrabold); }

/* Balance long headings */
.text-balance {
  text-wrap: balance;
}

/* ------------------------------------------------------------
   DIVIDERS & SEPARATORS
   ------------------------------------------------------------ */
.divider {
  height: 1px;
  background-color: var(--color-border);
  border: none;
  margin-block: var(--space-8);
}

.divider-subtle {
  background-color: var(--color-border-subtle);
}

/* ------------------------------------------------------------
   HERO SECTION UTILITIES
   ------------------------------------------------------------ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  background-color: var(--color-bg-primary);
  position: relative;
  overflow: hidden;
}

.hero-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

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

.hero-content {
  max-width: 800px;
}

.hero-centered .hero-content {
  margin-inline: auto;
}

/* Background grid pattern */
.bg-grid {
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
}

.bg-grid-dark {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
}

/* Gradient overlays */
.bg-gradient-radial {
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
}

.bg-gradient-radial-dark {
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
}

/* ------------------------------------------------------------
   FEATURE ICON WRAPPER
   ------------------------------------------------------------ */
.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  flex-shrink: 0;
}

.feature-icon-lg {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
}

.feature-icon-dark {
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--color-accent-light);
}

/* ------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------ */
.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse-secondary);
  padding-top: var(--space-24);
  padding-bottom: var(--space-12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-16);
  border-bottom: 1px solid var(--color-border-dark);
}

.footer-brand .nav-logo {
  color: var(--color-text-inverse);
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: var(--text-small);
  line-height: var(--leading-relaxed);
  max-width: 280px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col h4 {
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  color: var(--color-text-inverse);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

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

.footer-link {
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-text-inverse);
}

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

.footer-copyright {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.35);
}

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

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.5);
  transition: background-color var(--transition-fast),
              color var(--transition-fast);
}

.footer-social a:hover {
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--color-text-inverse);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* ------------------------------------------------------------
   SCROLL ANIMATION CLASSES (toggled by IntersectionObserver JS)
   ------------------------------------------------------------ */

/* scroll-animate: elements start hidden, wait for .is-visible */
.scroll-animate {
  transition-property: opacity, transform;
  transition-duration: 600ms;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Default hidden state — override with modifier classes below */
.fade-in-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in {
  opacity: 0;
  transition: opacity 700ms cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.scale-in {
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* is-visible: applied by IntersectionObserver — triggers animation */
.is-visible.fade-in-up,
.is-visible.fade-in,
.is-visible.fade-in-left,
.is-visible.fade-in-right,
.is-visible.scale-in {
  opacity: 1;
  transform: none;
}

/* Stagger delay utilities (apply to children) */
.stagger-1 { transition-delay: 100ms; }
.stagger-2 { transition-delay: 200ms; }
.stagger-3 { transition-delay: 300ms; }
.stagger-4 { transition-delay: 400ms; }
.stagger-5 { transition-delay: 500ms; }
.stagger-6 { transition-delay: 600ms; }

/* count-up — used by JS to detect and animate numeric counters */
.count-up {
  font-family: var(--font-mono);
  font-weight: var(--weight-bold);
  font-variant-numeric: tabular-nums;
  display: inline-block;
}

/* ------------------------------------------------------------
   @KEYFRAMES
   ------------------------------------------------------------ */

/* Gradient glow pulse */
@keyframes glow-pulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.2),
                0 0 40px rgba(59, 130, 246, 0.1);
  }
  50% {
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.4),
                0 0 80px rgba(59, 130, 246, 0.2);
  }
}

/* Subtle pulse for dots / indicators */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(0.92);
  }
}

/* Live dot blink */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

/* Float up-down */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}

/* Gradient background shift */
@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Slide-in from bottom */
@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Spin */
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Shimmer (skeleton loading) */
@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

/* ------------------------------------------------------------
   ANIMATION UTILITY CLASSES
   ------------------------------------------------------------ */
.animate-glow-pulse {
  animation: glow-pulse 3s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-float {
  animation: float 4s ease-in-out infinite;
}

.animate-blink {
  animation: blink 1.4s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-gradient {
  background-size: 200% 200%;
  animation: gradient-shift 4s ease infinite;
}

/* Gradient animated background */
.gradient-bg {
  background: linear-gradient(
    -45deg,
    #3B82F6,
    #1D4ED8,
    #60A5FA,
    #818CF8
  );
  background-size: 300% 300%;
  animation: gradient-shift 8s ease infinite;
}

/* Skeleton shimmer */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-secondary) 25%,
    var(--color-border-subtle) 50%,
    var(--color-bg-secondary) 75%
  );
  background-size: 800px 100%;
  animation: shimmer 1.5s infinite linear;
  border-radius: var(--radius-md);
}

/* ------------------------------------------------------------
   LIVE INDICATOR
   ------------------------------------------------------------ */
.live-dot {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-success);
}

.live-dot::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-success);
  animation: blink 1.4s ease-in-out infinite;
  flex-shrink: 0;
}

/* ------------------------------------------------------------
   TESTIMONIAL / QUOTE
   ------------------------------------------------------------ */
.testimonial {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
}

.testimonial-text {
  font-size: var(--text-body-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

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

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-subtle);
  object-fit: cover;
  flex-shrink: 0;
}

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

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

/* ------------------------------------------------------------
   PRICING TABLE
   ------------------------------------------------------------ */
.pricing-card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transition: box-shadow var(--transition-base),
              transform var(--transition-base);
}

.pricing-card.featured {
  background-color: var(--color-bg-dark);
  border-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-xl);
  transform: scale(1.02);
}

.pricing-card:hover:not(.featured) {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.pricing-price {
  font-family: var(--font-mono);
  font-size: var(--text-h1);
  font-weight: var(--weight-extrabold);
  line-height: 1;
}

.pricing-period {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  font-weight: var(--weight-regular);
}

/* ------------------------------------------------------------
   CODE BLOCK / SNIPPET
   ------------------------------------------------------------ */
.code-block {
  background-color: var(--color-bg-dark);
  color: #E2E8F0;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  line-height: var(--leading-relaxed);
  overflow-x: auto;
  position: relative;
}

.code-block-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-dark);
}

.code-block-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
}

.code-block-dot:nth-child(1) { background-color: #EF4444; }
.code-block-dot:nth-child(2) { background-color: #F59E0B; }
.code-block-dot:nth-child(3) { background-color: #10B981; }

/* Inline code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  padding: 0.125em 0.375em;
  border-radius: var(--radius-sm);
}

/* ------------------------------------------------------------
   FORM ELEMENTS
   ------------------------------------------------------------ */
.input {
  display: block;
  width: 100%;
  height: 44px;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  outline: none;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.input::placeholder {
  color: var(--color-text-muted);
}

.input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.input:invalid {
  border-color: var(--color-error);
}

.label {
  display: block;
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

/* ------------------------------------------------------------
   TOOLTIP
   ------------------------------------------------------------ */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: var(--z-tooltip, 1000);
}

.tooltip:hover::after {
  opacity: 1;
}

/* ------------------------------------------------------------
   SPACING UTILITIES
   ------------------------------------------------------------ */
.mt-auto  { margin-top: auto; }
.mb-auto  { margin-bottom: auto; }
.mx-auto  { margin-inline: auto; }

.gap-1  { gap: var(--space-1); }
.gap-2  { gap: var(--space-2); }
.gap-3  { gap: var(--space-3); }
.gap-4  { gap: var(--space-4); }
.gap-6  { gap: var(--space-6); }
.gap-8  { gap: var(--space-8); }
.gap-12 { gap: var(--space-12); }

/* ------------------------------------------------------------
   FLEX UTILITIES
   ------------------------------------------------------------ */
.flex          { display: flex; }
.flex-col      { display: flex; flex-direction: column; }
.items-center  { align-items: center; }
.items-start   { align-items: flex-start; }
.items-end     { align-items: flex-end; }
.justify-center  { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end     { justify-content: flex-end; }
.flex-wrap     { flex-wrap: wrap; }
.flex-1        { flex: 1; }
.shrink-0      { flex-shrink: 0; }

/* ------------------------------------------------------------
   VISIBILITY UTILITIES
   ------------------------------------------------------------ */
.hidden  { display: none; }
.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;
}

/* ------------------------------------------------------------
   RESPONSIVE HELPERS
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
  :root {
    --text-display: 3.5rem;
    --text-h1: 2.75rem;
    --text-h2: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --text-display: 2.75rem;
    --text-h1: 2.25rem;
    --text-h2: 1.75rem;
    --text-h3: 1.5rem;
  }

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

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

  .container,
  .container-narrow,
  .container-mid {
    padding-inline: var(--space-4);
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --text-display: 2.25rem;
    --text-h1: 1.875rem;
  }
}

/* ------------------------------------------------------------
   PRINT STYLES
   ------------------------------------------------------------ */
@media print {
  .nav,
  .footer {
    display: none;
  }

  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }
}