/* ==========================================================================
   MarkText Official Website - Main Stylesheet
   Style: Flat · Modern · Professional
   Palette derived from logo (#1A1A1A dark + #2DBCDD cyan accent)
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Brand colors (from logo) */
  --color-dark: #1a1a1a;
  --color-dark-soft: #2a2a2a;
  --color-accent: #2dbcdd;
  --color-accent-hover: #1fa8c9;
  --color-accent-soft: #e6f7fb;
  --color-accent-50: rgba(45, 188, 221, 0.08);
  --color-accent-100: rgba(45, 188, 221, 0.16);

  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fa;
  --color-bg-dark: #1a1a1a;
  --color-border: #e5e7eb;
  --color-border-soft: #f0f2f5;
  --color-text: #1f2937;
  --color-text-soft: #4b5563;
  --color-text-muted: #6b7280;
  --color-text-invert: #ffffff;
  --color-text-invert-muted: rgba(255, 255, 255, 0.72);

  /* Status */
  --color-success: #22c55e;
  --color-warning: #f59e0b;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Monaco, Consolas,
    "Courier New", monospace;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.18);
  --shadow-accent: 0 8px 24px -8px rgba(45, 188, 221, 0.45);

  /* Layout */
  --container-max: 1200px;
  --header-h: 64px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.2s var(--ease);
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

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

code,
pre,
kbd {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

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

.section {
  padding: var(--space-24) 0;
}
.section-sm {
  padding: var(--space-16) 0;
}
.section-alt {
  background: var(--color-bg-alt);
}

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

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-dark);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.625rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: 1em;
}
p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: 1.125rem;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-16);
}
.section-head .lead {
  margin-top: var(--space-4);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: 1.5px solid transparent;
  line-height: 1.2;
}
.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -8px rgba(45, 188, 221, 0.55);
}

.btn-dark {
  background: var(--color-dark);
  color: #fff;
}
.btn-dark:hover {
  background: var(--color-dark-soft);
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-50);
}

.btn-ghost-light {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  backdrop-filter: blur(8px);
}
.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* ---------- Header / Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border-soft);
  height: var(--header-h);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-dark);
  font-weight: 700;
  font-size: 1.125rem;
}
.brand:hover {
  color: var(--color-dark);
}
.brand img {
  width: 36px;
  height: 36px;
}
.brand span {
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav-link {
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-soft);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-link:hover {
  color: var(--color-accent);
  background: var(--color-accent-50);
}
.nav-link.active {
  color: var(--color-accent);
}

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

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-dark);
  position: relative;
  transition: all var(--transition);
}
.nav-toggle span::before {
  position: absolute;
  top: -6px;
}
.nav-toggle span::after {
  position: absolute;
  top: 6px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: var(--space-24) 0 var(--space-20);
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(45, 188, 221, 0.12), transparent 70%),
    linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.hero-content .eyebrow {
  margin-bottom: var(--space-4);
}
.hero h1 {
  margin-bottom: var(--space-5);
}
.hero h1 .accent {
  color: var(--color-accent);
}
.hero .lead {
  margin-bottom: var(--space-8);
  max-width: 540px;
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}
.hero-meta {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}
.hero-meta strong {
  display: block;
  color: var(--color-dark);
  font-size: 1.5rem;
  font-weight: 700;
}

.hero-visual {
  position: relative;
}
.hero-screenshot {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}
.hero-badge {
  position: absolute;
  top: -16px;
  right: -16px;
  background: var(--color-dark);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);
}

/* ---------- Stats bar ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  padding: var(--space-10) 0;
  border-block: 1px solid var(--color-border-soft);
}
.stat {
  text-align: center;
}
.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.stat-num .unit {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-left: 2px;
}
.stat-label {
  margin-top: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.feature-card {
  padding: var(--space-8);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.feature-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.feature-card:hover::before {
  transform: scaleX(1);
}
.feature-icon {
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}
.feature-icon img {
  width: 32px;
  height: 32px;
}
.feature-card h3 {
  margin-bottom: var(--space-3);
  font-size: 1.1875rem;
}
.feature-card p {
  color: var(--color-text-soft);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ---------- Usage scenarios ---------- */
.scenarios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.scenario-card {
  padding: var(--space-8);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  position: relative;
  transition: all var(--transition);
}
.scenario-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-100);
}
.scenario-emoji {
  font-size: 2rem;
  margin-bottom: var(--space-4);
  display: block;
}
.scenario-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-3);
}
.scenario-card p {
  color: var(--color-text-soft);
  font-size: 0.9375rem;
  line-height: 1.7;
}
.scenario-tag {
  display: inline-block;
  margin-top: var(--space-4);
  padding: 4px 12px;
  background: var(--color-accent-50);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

/* ---------- Testimonials ---------- */
.testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.testimonial {
  padding: var(--space-8);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all var(--transition);
}
.testimonial:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.testimonial-quote {
  position: absolute;
  top: 16px;
  right: 24px;
  font-size: 4rem;
  line-height: 1;
  color: var(--color-accent-100);
  font-family: Georgia, serif;
  pointer-events: none;
}
.testimonial-text {
  color: var(--color-text-soft);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), #6ec3dc);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.author-name {
  font-weight: 600;
  color: var(--color-dark);
  font-size: 0.9375rem;
}
.author-role {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--color-dark);
  color: #fff;
  padding: var(--space-20) 0;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(45, 188, 221, 0.18), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(45, 188, 221, 0.12), transparent 40%);
  pointer-events: none;
}
.cta-band .container {
  position: relative;
  text-align: center;
}
.cta-band h2 {
  color: #fff;
  margin-bottom: var(--space-4);
}
.cta-band p {
  color: var(--color-text-invert-muted);
  font-size: 1.0625rem;
  max-width: 560px;
  margin: 0 auto var(--space-8);
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(45, 188, 221, 0.1), transparent 70%),
    var(--color-bg-alt);
  padding: var(--space-20) 0 var(--space-16);
  text-align: center;
  border-bottom: 1px solid var(--color-border-soft);
}
.page-hero h1 {
  margin-bottom: var(--space-4);
}
.page-hero .lead {
  max-width: 680px;
  margin: 0 auto;
}
.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.breadcrumb a {
  color: var(--color-text-muted);
}
.breadcrumb a:hover {
  color: var(--color-accent);
}
.breadcrumb-sep {
  color: var(--color-border);
}

/* ---------- Content layouts ---------- */
.prose {
  max-width: 760px;
  margin: 0 auto;
}
.prose h2 {
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}
.prose h3 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}
.prose p {
  color: var(--color-text-soft);
  margin-bottom: var(--space-4);
}
.prose ul,
.prose ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}
.prose li {
  color: var(--color-text-soft);
  margin-bottom: var(--space-2);
  list-style: disc;
}
.prose ol li { list-style: decimal; }
.prose code {
  background: var(--color-accent-soft);
  color: var(--color-accent-hover);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875em;
}
.prose pre {
  background: var(--color-dark);
  color: #e5e7eb;
  padding: var(--space-5);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--space-4) 0;
}
.prose pre code {
  background: none;
  color: inherit;
  padding: 0;
}

/* ---------- Two column ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}
.two-col.reverse .two-col-text {
  order: 2;
}

/* ---------- Feature row (with image) ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  margin-bottom: var(--space-20);
}
.feature-row:last-child {
  margin-bottom: 0;
}
.feature-row.reverse .feature-row-content {
  order: 2;
}
.feature-row-content h2 {
  margin-bottom: var(--space-4);
}
.feature-row-content .lead {
  margin-bottom: var(--space-6);
}
.feature-row-list {
  margin-top: var(--space-5);
}
.feature-row-list li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--color-text-soft);
}
.feature-row-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  border-radius: 50%;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'><path d='M6.4 11.2L3.2 8l1.13-1.13L6.4 8.94l5.27-5.27L12.8 4.8z'/></svg>");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
}
.feature-row-visual {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  border: 1px solid var(--color-border);
}
.feature-row-visual img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* ---------- Download cards ---------- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}
.platform-card {
  padding: var(--space-8);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
}
.platform-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.platform-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-5);
  background: var(--color-accent-soft);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}
.platform-icon svg {
  width: 36px;
  height: 36px;
}
.platform-card h3 {
  margin-bottom: var(--space-2);
}
.platform-card .version {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.platform-card .size {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}

/* ---------- Package manager cards ---------- */
.pm-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-12);
}
.pm-card {
  padding: var(--space-6);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.pm-card h4 {
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.pm-card .pm-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.code-block {
  background: var(--color-dark);
  color: #e5e7eb;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.code-block code {
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
}
.copy-btn {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
  transition: background var(--transition);
}
.copy-btn:hover {
  background: rgba(255, 255, 255, 0.16);
}
.copy-btn.copied {
  background: var(--color-success);
}

/* ---------- Timeline (changelog) ---------- */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: var(--space-8);
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-12);
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-accent);
}
.timeline-version {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-50);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-2);
}
.timeline-item h3 {
  margin-bottom: var(--space-2);
}
.timeline-date {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.timeline-item ul {
  padding-left: var(--space-6);
}
.timeline-item li {
  list-style: disc;
  color: var(--color-text-soft);
  margin-bottom: var(--space-2);
  font-size: 0.9375rem;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--space-5) 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition);
}
.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease);
}
.faq-answer-inner {
  padding-bottom: var(--space-5);
  color: var(--color-text-soft);
  line-height: 1.75;
}

/* ---------- Shortcut table ---------- */
.shortcut-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}
.shortcut-table th,
.shortcut-table td {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  border-bottom: 1px solid var(--color-border-soft);
}
.shortcut-table th {
  background: var(--color-bg-alt);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.shortcut-table tr:last-child td {
  border-bottom: none;
}
.shortcut-table td:first-child {
  font-weight: 500;
  color: var(--color-dark);
}
.kbd {
  display: inline-block;
  padding: 2px 8px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-soft);
  box-shadow: 0 1px 0 var(--color-border);
}

/* ---------- Team grid ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}
.team-card {
  text-align: center;
  padding: var(--space-6);
}
.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  background: linear-gradient(135deg, var(--color-accent), #6ec3dc);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.75rem;
  font-weight: 700;
}
.team-card h4 {
  margin-bottom: var(--space-1);
}
.team-role {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ---------- Values grid ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.value-card {
  padding: var(--space-8);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
}
.value-card .icon {
  font-size: 2.25rem;
  margin-bottom: var(--space-4);
}
.value-card h3 {
  margin-bottom: var(--space-3);
}
.value-card p {
  color: var(--color-text-soft);
  font-size: 0.9375rem;
}

/* ---------- License card ---------- */
.license-card {
  background: var(--color-dark);
  color: #fff;
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.license-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(45, 188, 221, 0.2), transparent 60%);
}
.license-card > * {
  position: relative;
}
.license-card h2 {
  color: #fff;
  margin-bottom: var(--space-3);
}
.license-card .badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(45, 188, 221, 0.2);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-bottom: var(--space-5);
}
.license-card p {
  color: var(--color-text-invert-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-16) 0 var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}
.footer-brand .brand {
  color: #fff;
  margin-bottom: var(--space-4);
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.footer-col ul li {
  margin-bottom: var(--space-3);
}
.footer-col ul li a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.875rem;
  transition: color var(--transition);
}
.footer-col ul li a:hover {
  color: var(--color-accent);
}
.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.65);
}
.footer-bottom a:hover {
  color: var(--color-accent);
}
.footer-social {
  display: flex;
  gap: var(--space-3);
}
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition);
}
.footer-social a:hover {
  background: var(--color-accent);
  color: #fff;
}
.footer-social svg {
  width: 18px;
  height: 18px;
}

/* ---------- Download Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-6);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}
.modal-overlay.open {
  display: flex;
  opacity: 1;
    left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}
button { outline: none } 
.modal {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(0.96);
  opacity: 0;
  transition: all 0.3s var(--ease);
}
.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.modal-header {
  padding: var(--space-8) var(--space-8) var(--space-4);
  text-align: center;
  position: relative;
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.modal-close:hover {
  background: var(--color-border);
  color: var(--color-dark);
}
.modal-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
}
.modal-header h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}
.modal-header p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}
.modal-body {
  padding: var(--space-4) var(--space-8) var(--space-8);
}
.modal-cta {
  display: block;
  width: 100%;
  padding: 14px;
  background: var(--color-accent);
  color: #fff;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  transition: all var(--transition);
  box-shadow: var(--shadow-accent);
}
.modal-cta:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -8px rgba(45, 188, 221, 0.55);
}
.modal-qrs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.qr-item {
  text-align: center;
  padding: var(--space-5);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-soft);
}
.qr-item img {
  width: 170px;
  height: 170px;
  margin: 0 auto var(--space-3);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 6px;
}
.qr-item .qr-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 2px;
}
.qr-item .qr-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}
.modal-footer {
  text-align: center;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border-soft);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}
.modal-footer a {
  font-weight: 500;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-dark);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  opacity: 0;
  transition: all 0.3s var(--ease);
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.bg-alt { background: var(--color-bg-alt); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid,
  .feature-row,
  .two-col {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
  .feature-row.reverse .feature-row-content,
  .two-col.reverse .two-col-text {
    order: 0;
  }
  .feature-grid,
  .scenarios,
  .testimonials,
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .platform-grid {
    grid-template-columns: 1fr;
  }
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

@media (max-width: 720px) {
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    gap: var(--space-1);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-200%);
    transition: transform 0.3s var(--ease);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav.open {
    transform: translateY(0);
  }
  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }
  .nav-toggle {
    display: inline-flex;
  }
  .header-actions .btn-text {
    display: none;
  }
  .section {
    padding: var(--space-16) 0;
  }
  .hero {
    padding: var(--space-16) 0;
  }
  .feature-grid,
  .scenarios,
  .testimonials,
  .values-grid,
  .pm-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .modal-qrs {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }
  .hero-meta {
    gap: var(--space-4);
  }
}

/* ---------- Print ---------- */
@media print {
  .site-header,
  .site-footer,
  .modal-overlay,
  .nav-toggle,
  .cta-band {
    display: none !important;
  }
}

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.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;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-dark);
  color: #fff;
  padding: 8px 16px;
  z-index: 9999;
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}