/* ConvertFlow Design System */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 1000;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.link-primary {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

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

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

.flex-center-wrap {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

:root {
  --color-primary: #6366F1;
  --color-primary-hover: #4F46E5;
  --color-primary-soft: rgba(99, 102, 241, 0.12);
  --color-primary-glow: rgba(99, 102, 241, 0.28);
  --color-secondary: #8B5CF6;
  --color-accent: #22D3EE;
  --color-accent-soft: rgba(34, 211, 238, 0.1);

  --color-bg: #080C14;
  --color-bg-elevated: #0E1420;
  --color-surface: #131B2B;
  --color-surface-elevated: #1A2438;
  --color-surface-hover: #1F2B42;
  --color-surface-glass: rgba(19, 27, 43, 0.88);

  --color-border: rgba(148, 163, 184, 0.1);
  --color-border-hover: rgba(148, 163, 184, 0.22);
  --color-border-focus: rgba(99, 102, 241, 0.45);

  --color-text: #F1F5F9;
  --color-text-secondary: #CBD5E1;
  --color-muted: #7B8BA3;
  --color-success: #34D399;
  --color-error: #F87171;
  --color-warning: #FBBF24;

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --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;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 32px var(--color-primary-glow);

  --transition-fast: 140ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 220ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 360ms cubic-bezier(0.4, 0, 0.2, 1);

  --header-height: 4rem;
  --header-bg: rgba(8, 12, 20, 0.82);
  --header-bg-scrolled: rgba(8, 12, 20, 0.95);
  --header-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --container-max: 1180px;
  --container-narrow: 760px;
}

*, *::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-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 45% at 15% -5%, rgba(99, 102, 241, 0.14), transparent 55%),
    radial-gradient(ellipse 50% 35% at 90% 5%, rgba(139, 92, 246, 0.08), transparent 50%),
    radial-gradient(ellipse 40% 30% at 50% 100%, rgba(34, 211, 238, 0.05), transparent 50%);
  pointer-events: none;
  z-index: -2;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(148, 163, 184, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 85%);
  pointer-events: none;
  z-index: -1;
}

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

svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

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

.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;
}

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

.container--narrow {
  max-width: var(--container-narrow);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

h1 { font-size: clamp(2.25rem, 5.5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.0625rem, 2vw, 1.25rem); }

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

.text-gradient {
  background: linear-gradient(135deg, #A5B4FC 0%, #818CF8 40%, #22D3EE 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section--alt {
  background: linear-gradient(180deg, transparent, rgba(19, 27, 43, 0.5) 20%, rgba(19, 27, 43, 0.5) 80%, transparent);
  border-block: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.section-header h2 {
  margin-bottom: var(--space-3);
}

.section-header p {
  color: var(--color-muted);
  max-width: 520px;
  margin-inline: auto;
  font-size: 1.0625rem;
}

.panel-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.panel-title--row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.panel-title--row .panel-title {
  margin-bottom: 0;
}

/* Light theme */
[data-theme="light"] {
  --color-primary: #4F46E5;
  --color-primary-hover: #4338CA;
  --color-primary-soft: rgba(79, 70, 229, 0.1);
  --color-primary-glow: rgba(79, 70, 229, 0.18);
  --color-secondary: #7C3AED;
  --color-accent: #0891B2;
  --color-accent-soft: rgba(8, 145, 178, 0.08);

  --color-bg: #F8FAFC;
  --color-bg-elevated: #F1F5F9;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #F8FAFC;
  --color-surface-hover: #F1F5F9;
  --color-surface-glass: rgba(255, 255, 255, 0.92);

  --color-border: rgba(15, 23, 42, 0.08);
  --color-border-hover: rgba(15, 23, 42, 0.14);
  --color-border-focus: rgba(79, 70, 229, 0.35);

  --color-text: #0F172A;
  --color-text-secondary: #334155;
  --color-muted: #64748B;
  --color-success: #059669;
  --color-error: #DC2626;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.09);

  --header-bg: rgba(255, 255, 255, 0.9);
  --header-bg-scrolled: rgba(255, 255, 255, 0.97);
  --header-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
}

[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 70% 45% at 15% -5%, rgba(99, 102, 241, 0.07), transparent 55%),
    radial-gradient(ellipse 50% 35% at 90% 5%, rgba(139, 92, 246, 0.05), transparent 50%),
    radial-gradient(ellipse 40% 30% at 50% 100%, rgba(8, 145, 178, 0.04), transparent 50%);
}

[data-theme="light"] body::after {
  background-image: radial-gradient(rgba(15, 23, 42, 0.05) 1px, transparent 1px);
}

[data-theme="light"] .text-gradient {
  background: linear-gradient(135deg, #4338CA 0%, #4F46E5 45%, #0891B2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="light"] .section--alt {
  background: linear-gradient(180deg, transparent, rgba(241, 245, 249, 0.9) 15%, rgba(241, 245, 249, 0.9) 85%, transparent);
}

[data-theme="light"] .card__badge--image { color: #4338CA; }
[data-theme="light"] .card__badge--svg { color: #6D28D9; }
[data-theme="light"] .card__badge--pdf { color: #0E7490; }
[data-theme="light"] .hero__badge { color: #4338CA; }
[data-theme="light"] .workflow-step--active { color: #4338CA; }
[data-theme="light"] .status--processing { color: #4338CA; }

.card,
.header,
.btn,
.form-input,
.form-select,
.upload-zone,
.tool-item,
.faq-item {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}