/* ================================================================
   PrivyQR — "Secure Vault" Design System
   Privacy-first QR code scanner & generator
   ================================================================ */

/* ----------------------------------------------------------------
   1. CSS Reset & Custom Properties
   ---------------------------------------------------------------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Palette — backgrounds */
  --bg-deep: #070B14;
  --bg-body: #0B1120;
  --bg-card: rgba(15, 23, 42, 0.8);
  --bg-input: #0F172A;
  --bg-footer: #0A0F1C;
  --bg-nav: rgba(7, 11, 20, 0.85);

  /* Palette — accent */
  --green: #22C97A;
  --green-dim: rgba(34, 201, 122, 0.1);
  --green-mid: rgba(34, 201, 122, 0.3);
  --green-glow: rgba(34, 201, 122, 0.35);
  --cyan: #06B6D4;

  /* Palette — text */
  --text-primary: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  /* Palette — borders */
  --border-subtle: rgba(34, 201, 122, 0.1);
  --border-hover: rgba(34, 201, 122, 0.3);
  --border-input: #1E293B;

  /* Palette — semantic */
  --error: #EF4444;
  --warning: #F59E0B;
  --success: #22C97A;

  /* Typography */
  --font-display: 'Sora', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing scale (4px base) */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
  --transition-slow: 400ms var(--ease-out);

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px var(--green-glow), 0 0 60px rgba(34, 201, 122, 0.1);
  --shadow-glow-sm: 0 0 10px rgba(34, 201, 122, 0.2);

  /* Layout */
  --nav-height: 70px;
  --container-max: 1200px;
  --prose-max: 720px;
}

/* ----------------------------------------------------------------
   2. Base Styles
   ---------------------------------------------------------------- */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-body) 100%);
  background-attachment: fixed;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Dot grid overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(34, 201, 122, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

/* Radial ambient light — top center glow */
body::after {
  content: '';
  position: fixed;
  top: -30%;
  left: 50%;
  width: 120%;
  height: 70%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(34, 201, 122, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Ensure content sits above overlays */
body > * {
  position: relative;
  z-index: 1;
}

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

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

a:hover {
  color: #3DDFA0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }

p { margin-bottom: var(--sp-4); }
p:last-child { margin-bottom: 0; }

::selection {
  background: rgba(34, 201, 122, 0.3);
  color: var(--text-primary);
}

/* ----------------------------------------------------------------
   3. Navigation
   ---------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
}

.nav__logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav__logo:hover {
  color: var(--green);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  list-style: none;
}

.nav__link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--green);
  border-radius: 1px;
}

.nav__cta {
  margin-left: var(--sp-4);
}

/* Hamburger toggle */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* X animation when open */
.nav__hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav panel */
.nav__mobile-panel {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--sp-8) var(--sp-6);
  z-index: 999;
  flex-direction: column;
  gap: var(--sp-6);
}

.nav__mobile-panel.is-open {
  display: flex;
}

.nav__mobile-panel .nav__link {
  font-size: 1.25rem;
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--border-subtle);
}

/* ----------------------------------------------------------------
   4. Hero Section
   ---------------------------------------------------------------- */
.hero {
  padding: calc(var(--nav-height) + var(--sp-20)) 0 var(--sp-20);
  text-align: center;
}

.hero__heading {
  margin-bottom: var(--sp-6);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.text-gradient {
  background: linear-gradient(135deg, var(--green) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto var(--sp-10);
  line-height: 1.7;
}

/* Trust badges row */
.hero__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-6);
  margin-bottom: var(--sp-10);
}

.hero__badge {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero__badge svg {
  width: 18px;
  height: 18px;
  color: var(--green);
  flex-shrink: 0;
}

.hero__actions {
  display: flex;
  gap: var(--sp-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ----------------------------------------------------------------
   5. Scanner Tool
   ---------------------------------------------------------------- */
.scanner {
  max-width: 680px;
  margin: 0 auto;
}

.scanner__tabs,
.generator__tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--sp-6);
}

.scanner__tab,
.generator__tab {
  flex: 1;
  padding: var(--sp-3) var(--sp-4);
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}

.scanner__tab:hover,
.generator__tab:hover {
  color: var(--text-muted);
}

.scanner__tab--active,
.generator__tab--active {
  color: var(--text-primary);
}

.scanner__tab--active::after,
.generator__tab--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: var(--sp-4);
  right: var(--sp-4);
  height: 2px;
  background: var(--green);
  border-radius: 1px 1px 0 0;
}

/* Tab panels — hide inactive, show active */
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
}

/* Drop zone */
.scanner__dropzone {
  border: 2px dashed var(--border-input);
  border-radius: var(--radius-md);
  padding: var(--sp-12) var(--sp-8);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.scanner__dropzone:hover,
.scanner__dropzone.is-dragover {
  border-color: var(--green-mid);
  background: rgba(34, 201, 122, 0.03);
}

.scanner__dropzone-icon {
  width: 48px;
  height: 48px;
  color: var(--text-dim);
  margin: 0 auto var(--sp-4);
}

.scanner__dropzone-text {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.scanner__dropzone-text strong {
  color: var(--green);
}

/* Camera viewport */
.scanner__camera {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
}

.scanner__camera video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner__camera-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.scanner__camera-frame {
  width: 60%;
  aspect-ratio: 1;
  border: 2px solid var(--green);
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
}

/* Results */
.scanner__results {
  margin-top: var(--sp-6);
}

.scanner__result {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
}

.scanner__result-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(34, 201, 122, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--green);
}

.scanner__result-icon svg {
  width: 20px;
  height: 20px;
}

.scanner__result-type {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-1);
}

.scanner__result-value {
  font-size: 0.95rem;
  word-break: break-all;
  margin-bottom: var(--sp-3);
}

.scanner__result-actions {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}

/* ----------------------------------------------------------------
   6. Generator Tool
   ---------------------------------------------------------------- */
.generator {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: start;
}

.generator__controls {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.generator__preview {
  position: sticky;
  top: calc(var(--nav-height) + var(--sp-8));
}

.generator__canvas-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--sp-8);
  display: flex;
  align-items: center;
  justify-content: center;
}

.generator__canvas-wrap canvas {
  border-radius: var(--radius-sm);
  max-width: 100%;
  height: auto;
}

.generator__download-actions {
  display: flex;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}

.generator__color-row {
  display: flex;
  gap: var(--sp-4);
  align-items: center;
}

.generator__color-picker {
  width: 48px;
  height: 48px;
  border: 2px solid var(--border-input);
  border-radius: var(--radius-sm);
  padding: 2px;
  cursor: pointer;
  background: var(--bg-input);
}

.generator__color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}

.generator__color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

.generator__size-control {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.generator__size-control input[type="range"] {
  flex: 1;
  accent-color: var(--green);
}

.generator__size-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  min-width: 48px;
  text-align: right;
}

/* ----------------------------------------------------------------
   7. Cards
   ---------------------------------------------------------------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--sp-8);
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: rgba(34, 201, 122, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-5);
  color: var(--green);
}

.card__icon svg {
  width: 24px;
  height: 24px;
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--sp-3);
}

.card__text {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ----------------------------------------------------------------
   8. Features Grid
   ---------------------------------------------------------------- */
.features {
  padding: var(--sp-20) 0;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.features__heading {
  text-align: center;
  margin-bottom: var(--sp-12);
}

.features__heading h2 {
  margin-bottom: var(--sp-4);
}

.features__heading p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ----------------------------------------------------------------
   9. Comparison Table
   ---------------------------------------------------------------- */
.comparison {
  padding: var(--sp-20) 0;
}

.comparison__table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  max-width: 900px;
  margin: 0 auto;
}

.comparison__column {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--sp-8);
}

.comparison__column--privy {
  border-color: var(--green-mid);
}

.comparison__column-header {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--border-subtle);
}

.comparison__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.comparison__item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.comparison__icon--bad {
  color: var(--error);
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.comparison__icon--good {
  color: var(--green);
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

/* ----------------------------------------------------------------
   10. Blog Cards
   ---------------------------------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.blog-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.blog-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--bg-deep), var(--bg-body));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
}

.blog-card__body {
  padding: var(--sp-6);
}

.blog-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: var(--sp-3);
  line-height: 1.4;
}

.blog-card__title a {
  color: var(--text-primary);
  text-decoration: none;
}

.blog-card__title a:hover {
  color: var(--green);
}

.blog-card__excerpt {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.65;
  margin-bottom: var(--sp-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.blog-card__read-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
}

.blog-card__read-more::after {
  content: '\2192';
  transition: transform var(--transition-fast);
}

.blog-card__read-more:hover::after {
  transform: translateX(4px);
}

/* ----------------------------------------------------------------
   11. Blog Article / Prose Layout
   ---------------------------------------------------------------- */
.article-layout {
  display: grid;
  grid-template-columns: var(--prose-max) 1fr;
  gap: var(--sp-12);
  max-width: calc(var(--prose-max) + 300px);
  margin: 0 auto;
  padding: calc(var(--nav-height) + var(--sp-12)) var(--sp-6) var(--sp-20);
}

.prose {
  max-width: var(--prose-max);
}

.prose h1 {
  margin-bottom: var(--sp-8);
}

.prose h2 {
  margin-top: var(--sp-12);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--border-subtle);
}

.prose h3 {
  margin-top: var(--sp-8);
  margin-bottom: var(--sp-4);
}

.prose p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: var(--sp-5);
}

.prose a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

.prose ul,
.prose ol {
  padding-left: var(--sp-6);
  margin-bottom: var(--sp-5);
  color: var(--text-muted);
}

.prose li {
  margin-bottom: var(--sp-2);
  line-height: 1.75;
}

.prose blockquote {
  border-left: 3px solid var(--green);
  padding: var(--sp-4) var(--sp-6);
  margin: var(--sp-6) 0;
  background: rgba(34, 201, 122, 0.03);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
  font-style: italic;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(15, 23, 42, 0.8);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--border-input);
  color: var(--green);
}

.prose pre {
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  overflow-x: auto;
  margin: var(--sp-6) 0;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.prose img {
  border-radius: var(--radius-md);
  margin: var(--sp-6) 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--sp-6) 0;
}

.prose th,
.prose td {
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border-input);
  text-align: left;
  font-size: 0.9rem;
}

.prose th {
  background: var(--bg-input);
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Table of contents sidebar */
.toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--sp-8));
}

.toc__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: var(--sp-4);
}

.toc__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.toc__link {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  padding: var(--sp-1) 0;
  border-left: 2px solid transparent;
  padding-left: var(--sp-3);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.toc__link:hover,
.toc__link--active {
  color: var(--text-primary);
  border-left-color: var(--green);
}

/* ----------------------------------------------------------------
   12. FAQ Accordion
   ---------------------------------------------------------------- */
.faq {
  padding: var(--sp-20) 0;
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--border-subtle);
}

.faq__question {
  width: 100%;
  background: none;
  border: none;
  padding: var(--sp-5) 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-4);
  transition: color var(--transition-fast);
}

.faq__question:hover {
  color: var(--green);
}

.faq__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
}

/* Plus/minus icon built with pseudo-elements */
.faq__icon::before,
.faq__icon::after {
  content: '';
  position: absolute;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.faq__icon::before {
  width: 14px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq__icon::after {
  width: 2px;
  height: 14px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Rotate vertical bar to 0 height for minus */
.faq__item.is-open .faq__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq__answer-inner {
  padding-bottom: var(--sp-6);
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.75;
}

.faq__item.is-open .faq__answer {
  max-height: 500px;
}

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

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-8);
  margin-bottom: var(--sp-12);
}

.footer__brand-text {
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.65;
  margin-top: var(--sp-4);
  max-width: 280px;
}

.footer__heading {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: var(--sp-5);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer__social {
  display: flex;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

.footer__social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.footer__social a:hover {
  border-color: var(--green);
  color: var(--green);
}

.footer__social svg {
  width: 16px;
  height: 16px;
}

.footer__bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--sp-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.footer__copyright {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer__bottom-links {
  display: flex;
  gap: var(--sp-6);
  list-style: none;
}

.footer__bottom-links a {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-decoration: none;
}

.footer__bottom-links a:hover {
  color: var(--text-muted);
}

/* ----------------------------------------------------------------
   14. Forms
   ---------------------------------------------------------------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.form-input,
.form-textarea,
.form-select {
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  padding: var(--sp-3) var(--sp-4);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  width: 100%;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(34, 201, 122, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-dim);
}

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

.form-select {
  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' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--sp-3) center;
  padding-right: var(--sp-10);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 1px solid var(--border-input);
  border-radius: 4px;
  background: var(--bg-input);
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
  position: relative;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.form-checkbox input[type="checkbox"]:checked {
  background: var(--green);
  border-color: var(--green);
}

.form-checkbox input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 2px;
  width: 5px;
  height: 9px;
  border: 2px solid var(--bg-deep);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.form-checkbox span {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.form-error {
  font-size: 0.8rem;
  color: var(--error);
  margin-top: var(--sp-1);
}

/* ----------------------------------------------------------------
   15. Buttons
   ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  white-space: nowrap;
  line-height: 1.4;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn--primary {
  background: var(--green);
  color: var(--bg-deep);
  box-shadow: var(--shadow-glow-sm);
}

.btn--primary:hover {
  background: #3DDFA0;
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
  color: var(--bg-deep);
}

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

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

.btn--secondary:hover {
  background: rgba(34, 201, 122, 0.08);
  box-shadow: var(--shadow-glow-sm);
  color: var(--green);
}

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  padding: var(--sp-2) var(--sp-4);
}

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

.btn--sm {
  font-size: 0.8rem;
  padding: var(--sp-2) var(--sp-4);
}

.btn--lg {
  font-size: 1rem;
  padding: var(--sp-4) var(--sp-8);
}

.btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ----------------------------------------------------------------
   16. Toast Notifications
   ---------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: var(--sp-6);
  right: var(--sp-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--sp-4) var(--sp-5);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-width: 280px;
  max-width: 400px;
  box-shadow: var(--shadow-card);
  pointer-events: auto;
  animation: toastSlideIn var(--transition-slow) forwards;
}

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

.toast__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.toast--success .toast__icon { color: var(--success); }
.toast--error .toast__icon   { color: var(--error); }
.toast--warning .toast__icon { color: var(--warning); }

.toast__message {
  font-size: 0.85rem;
  color: var(--text-muted);
  flex: 1;
}

.toast__close {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: var(--sp-1);
}

.toast.is-leaving {
  animation: toastSlideOut var(--transition-base) forwards;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes toastSlideOut {
  from {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateX(100%) scale(0.95);
  }
}

/* ----------------------------------------------------------------
   17. Animations
   ---------------------------------------------------------------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.animate-on-scroll.is-visible .animate-child:nth-child(1) { transition-delay: 0ms; }
.animate-on-scroll.is-visible .animate-child:nth-child(2) { transition-delay: 80ms; }
.animate-on-scroll.is-visible .animate-child:nth-child(3) { transition-delay: 160ms; }
.animate-on-scroll.is-visible .animate-child:nth-child(4) { transition-delay: 240ms; }
.animate-on-scroll.is-visible .animate-child:nth-child(5) { transition-delay: 320ms; }
.animate-on-scroll.is-visible .animate-child:nth-child(6) { transition-delay: 400ms; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(34, 201, 122, 0.2);
  }
  50% {
    box-shadow: 0 0 30px rgba(34, 201, 122, 0.4), 0 0 60px rgba(34, 201, 122, 0.15);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.pulse-glow {
  animation: pulseGlow 3s ease-in-out infinite;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ----------------------------------------------------------------
   18. Utility Classes
   ---------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--sp-6);
  padding-right: var(--sp-6);
}

.section-padding {
  padding-top: var(--sp-20);
  padding-bottom: var(--sp-20);
}

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

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

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

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

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

.mb-0  { margin-bottom: 0; }
.mb-2  { margin-bottom: var(--sp-2); }
.mb-4  { margin-bottom: var(--sp-4); }
.mb-6  { margin-bottom: var(--sp-6); }
.mb-8  { margin-bottom: var(--sp-8); }
.mb-12 { margin-bottom: var(--sp-12); }
.mb-16 { margin-bottom: var(--sp-16); }

.mt-4  { margin-top: var(--sp-4); }
.mt-8  { margin-top: var(--sp-8); }

.gap-2 { gap: var(--sp-2); }
.gap-4 { gap: var(--sp-4); }
.gap-6 { gap: var(--sp-6); }

.flex       { display: flex; }
.flex-col   { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap  { flex-wrap: wrap; }

.grid { display: grid; }

.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-width: 0;
}

/* ----------------------------------------------------------------
   19. Responsive Breakpoints
   ---------------------------------------------------------------- */

/* Tablet and below */
@media (max-width: 768px) {
  :root {
    --sp-20: 3rem;
    --sp-16: 2.5rem;
    --sp-12: 2rem;
  }

  /* Nav — hamburger visible */
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__cta.desktop-only {
    display: none;
  }

  /* Grids collapse to 2 columns */
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  /* Generator — single column */
  .generator {
    grid-template-columns: 1fr;
  }

  .generator__preview {
    position: static;
  }

  /* Article layout — no sidebar */
  .article-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    display: none;
  }

  /* Footer — 2 columns */
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  /* Reduce card padding */
  .card {
    padding: var(--sp-6);
  }

  .hero__badges {
    gap: var(--sp-4);
  }

  .hero__badge {
    font-size: 0.65rem;
  }
}

/* Mobile */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .container {
    padding-left: var(--sp-4);
    padding-right: var(--sp-4);
  }

  /* All grids collapse to single column */
  .features__grid,
  .blog-grid {
    grid-template-columns: 1fr;
  }

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

  /* Hero adjustments */
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__actions .btn {
    justify-content: center;
  }

  .hero__badges {
    flex-direction: column;
    align-items: center;
    gap: var(--sp-3);
  }

  /* Scanner full width */
  .scanner__dropzone {
    padding: var(--sp-8) var(--sp-4);
  }

  /* Footer bottom stacks */
  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Toast full width */
  .toast-container {
    left: var(--sp-4);
    right: var(--sp-4);
    bottom: var(--sp-4);
  }

  .toast {
    min-width: 0;
    max-width: 100%;
  }
}

/* ----------------------------------------------------------------
   20. Print Styles
   ---------------------------------------------------------------- */
@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  body::before,
  body::after {
    display: none !important;
  }

  .nav,
  .footer,
  .toast-container,
  .scanner__camera,
  .hero__actions,
  .btn,
  .nav__hamburger,
  .nav__mobile-panel {
    display: none !important;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  a {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    font-weight: normal;
  }

  .card {
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }

  h2, h3 {
    page-break-after: avoid;
  }

  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }

  .prose {
    max-width: 100%;
  }
}

/* ----------------------------------------------------------------
   Pro Badge & License UI
   ---------------------------------------------------------------- */
.pro-badge {
  display: inline-block;
  background: var(--green);
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 100px;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: var(--sp-3);
}

.pro-only {
  display: none;
}

.pro-locked {
  opacity: 0.4;
  pointer-events: none;
  position: relative;
}

.pro-locked::after {
  content: 'PRO';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--green);
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 2px 8px;
  border-radius: 100px;
}