@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@200;300;400;500;600;700&family=Roboto+Condensed:wght@300;400;700&display=swap');

/* ── Theme tokens (mirrors frontend/src/App.css) ── */
:root {
  --color-primary: #5B6CF9;
  --color-primary-dark: #4355E8;
  --color-primary-light: #EEF0FE;
  --color-primary-gradient: linear-gradient(135deg, #5B6CF9 0%, #818CF8 100%);

  --color-bg: #FFFFFF;
  --color-bg-secondary: #F8F9FC;
  --color-bg-tertiary: #F0F2F8;
  --color-bg-hover: #F3F4FA;
  --color-bg-glass: rgba(255, 255, 255, 0.92);

  --color-text: #0F1117;
  --color-text-secondary: #5C6170;
  --color-text-muted: #9BA3B4;
  --color-text-inverse: #FFFFFF;

  --color-border: #E8EAF2;
  --color-border-light: #F3F4F9;
  --color-border-modal: #D0D3E8;

  --color-overlay: rgba(15, 17, 23, 0.6);
  --color-glow: rgba(91, 108, 249, 0.12);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-primary: #818CF8;
    --color-primary-dark: #6366F1;
    --color-primary-light: #1E2140;
    --color-primary-gradient: linear-gradient(135deg, #6366F1 0%, #818CF8 100%);

    --color-bg: #0D0F14;
    --color-bg-secondary: #141720;
    --color-bg-tertiary: #1C2030;
    --color-bg-hover: #1E2235;
    --color-bg-glass: rgba(20, 23, 32, 0.92);

    --color-text: #E8EAF6;
    --color-text-secondary: #9099B5;
    --color-text-muted: #50586E;
    --color-text-inverse: #0D0F14;

    --color-border: #252A3A;
    --color-border-light: #1C2030;
    --color-border-modal: #3A4060;

    --color-overlay: rgba(0, 0, 0, 0.75);
    --color-glow: rgba(91, 108, 249, 0.14);

    color-scheme: dark;
  }
}

[data-theme="dark"] {
  --color-primary: #818CF8;
  --color-primary-dark: #6366F1;
  --color-primary-light: #1E2140;
  --color-primary-gradient: linear-gradient(135deg, #6366F1 0%, #818CF8 100%);

  --color-bg: #0D0F14;
  --color-bg-secondary: #141720;
  --color-bg-tertiary: #1C2030;
  --color-bg-hover: #1E2235;
  --color-bg-glass: rgba(20, 23, 32, 0.92);

  --color-text: #E8EAF6;
  --color-text-secondary: #9099B5;
  --color-text-muted: #50586E;
  --color-text-inverse: #0D0F14;

  --color-border: #252A3A;
  --color-border-light: #1C2030;
  --color-border-modal: #3A4060;

  --color-overlay: rgba(0, 0, 0, 0.75);
  --color-glow: rgba(91, 108, 249, 0.14);

  color-scheme: dark;
}

[data-theme="light"] {
  --color-primary: #5B6CF9;
  --color-primary-dark: #4355E8;
  --color-primary-light: #EEF0FE;
  --color-primary-gradient: linear-gradient(135deg, #5B6CF9 0%, #818CF8 100%);

  --color-bg: #FFFFFF;
  --color-bg-secondary: #F8F9FC;
  --color-bg-tertiary: #F0F2F8;
  --color-bg-hover: #F3F4FA;
  --color-bg-glass: rgba(255, 255, 255, 0.92);

  --color-text: #0F1117;
  --color-text-secondary: #5C6170;
  --color-text-muted: #9BA3B4;
  --color-text-inverse: #FFFFFF;

  --color-border: #E8EAF2;
  --color-border-light: #F3F4F9;
  --color-border-modal: #D0D3E8;

  --color-overlay: rgba(15, 17, 23, 0.6);
  --color-glow: rgba(91, 108, 249, 0.12);

  color-scheme: light;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: background 0.25s ease, color 0.25s ease;
}

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

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

::selection {
  background: rgba(91, 108, 249, 0.28);
  color: var(--color-text);
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--color-bg-secondary);
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(135deg, #141e30 0%, #243b55 100%);
  border-bottom: 1px solid #3b3d3f;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

.site-header .brand,
.site-header .brand:hover {
  color: #e8eaf6;
}

.brand img {
  width: 32px;
  height: 32px;
}

.brand:hover {
  text-decoration: none;
  color: var(--color-text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.18s ease, background 0.18s ease;
}

.site-nav a:hover {
  color: var(--color-text);
  background: var(--color-bg-hover);
  text-decoration: none;
}

.site-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle,
.nav-open,
.nav-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}

.theme-toggle:hover,
.nav-open:hover,
.nav-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.site-header .theme-toggle,
.site-header .nav-open,
.site-header .nav-close {
  background: hsl(232deg 18% 8%);
  border-color: #3b3d3f;
  color: #e7e9f5;
}

.site-header .theme-toggle:hover,
.site-header .nav-open:hover,
.site-header .nav-close:hover {
  background: hsl(232deg 6% 17%);
  color: #fff;
}

.nav-open,
.nav-close {
  display: none;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 12px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary-gradient);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(91, 108, 249, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(91, 108, 249, 0.5);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--color-text-inverse);
}

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

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

.btn-secondary:hover {
  background: var(--color-bg-hover);
  text-decoration: none;
  color: var(--color-text);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

/* ── Hero ── */
.hero {
  position: relative;
  padding: 120px 0 96px;
  overflow: hidden;
  background: var(--color-bg);
}

.hero::before {
  content: '';
  position: absolute;
  top: -160px;
  right: -120px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(91, 108, 249, 0.22), transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -120px;
  left: -80px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(129, 140, 248, 0.16), transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 99px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero h1 .gradient {
  background: var(--color-primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-media img {
  border-radius: 28px;
  box-shadow: 0 32px 64px var(--color-glow), 0 12px 32px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--color-border);
}

/* ── Feature cards ── */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px;
  border-radius: 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px var(--color-glow);
  border-color: var(--color-border-modal);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ── Security strip ── */
.security-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.security-item {
  padding: 24px;
}

.security-item strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.security-item span {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

/* ── CTA ── */
.cta {
  position: relative;
  padding: 80px 0;
  background: var(--color-bg-secondary);
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(91, 108, 249, 0.14), transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}

.cta .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Page header ── */
.page-header {
  padding: 80px 0 48px;
  text-align: center;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, rgba(91, 108, 249, 0.16), transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.page-header p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* ── Content blocks ── */
.content-block {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 0;
}

.content-block h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.content-block p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.content-block ul {
  margin: 16px 0 24px 20px;
  color: var(--color-text-secondary);
}

.content-block li {
  margin-bottom: 8px;
}

/* ── Download grid ── */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
  padding: 64px 0;
}

.download-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 32px;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.download-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 20px 0 8px;
}

.download-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.download-card .btn {
  margin-top: auto;
}

/* ── Contact form ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  max-width: 980px;
  margin: 0 auto;
  padding: 64px 0;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-bg-secondary);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  background: var(--color-bg);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(91, 108, 249, 0.14);
}

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

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

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.contact-info a {
  font-weight: 500;
}

/* ── Footer ── */
.site-footer {
  padding: 56px 0 32px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-top: 16px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-media {
    order: -1;
  }

  .feature-grid,
  .security-strip,
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 680px) {
  .section {
    padding: 64px 0;
  }

  .feature-grid,
  .security-strip,
  .download-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 80px 24px 24px;
    background: linear-gradient(135deg, #141e30 0%, #243b55 100%);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    z-index: 101;
  }

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

  .site-nav a {
    width: 100%;
    padding: 14px 0;
    font-size: 1.125rem;
    border-radius: 0;
  }

  .nav-open {
    display: inline-flex;
  }

  .nav-close {
    display: inline-flex;
    position: absolute;
    top: 16px;
    right: 24px;
  }

  .hero {
    padding: 64px 0 48px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ── CodePen-style app tabs ── */
.tabs-card {
  max-width: 720px;
  margin: 0 auto;
  border-radius: 20px;
  overflow: hidden;
  background: #0d0f14;
  border: 1px solid #252a3a;
  box-shadow: 0 32px 64px rgba(91, 108, 249, 0.12), 0 12px 32px rgba(0, 0, 0, 0.2);
}

.tab-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
}

.tabs-bar {
  position: relative;
  display: flex;
  width: 100%;
  height: 50px;
  background: #16181a;
  border-bottom: 1px solid #252a3a;
}

.tab-label {
  position: relative;
  flex: 1 1 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  text-align: center;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #9099b5;
  cursor: pointer;
  transition: color 0.25s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  z-index: 2;
}

.tab-label:hover {
  color: #e8eaf6;
}

#features-tab-1:checked ~ .tabs-bar .tab-label[for="features-tab-1"],
#features-tab-2:checked ~ .tabs-bar .tab-label[for="features-tab-2"],
#features-tab-3:checked ~ .tabs-bar .tab-label[for="features-tab-3"],
#features-tab-4:checked ~ .tabs-bar .tab-label[for="features-tab-4"] {
  color: #818cf8;
}

#features-tab-2:checked ~ .tabs-bar .tab-label[for="features-tab-2"] {
  color: #34d399;
}

#features-tab-3:checked ~ .tabs-bar .tab-label[for="features-tab-3"] {
  color: #fbbf24;
}

#features-tab-4:checked ~ .tabs-bar .tab-label[for="features-tab-4"] {
  color: #f472b6;
}

.tabs-glider {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 3px;
  width: 25%;
  background: var(--color-primary-gradient);
  box-shadow: 0 0 12px rgba(91, 108, 249, 0.55);
  transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s ease, box-shadow 0.3s ease;
  z-index: 3;
  border-radius: 3px 3px 0 0;
}

.tabs-content {
  position: relative;
  min-height: 260px;
  background: #0d0f14;
  padding: 32px;
}

.tab-panel {
  position: absolute;
  inset: 32px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

#features-tab-1:checked ~ .tabs-content .tab-panel:nth-of-type(1),
#features-tab-2:checked ~ .tabs-content .tab-panel:nth-of-type(2),
#features-tab-3:checked ~ .tabs-content .tab-panel:nth-of-type(3),
#features-tab-4:checked ~ .tabs-content .tab-panel:nth-of-type(4) {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#features-tab-1:checked ~ .tabs-bar .tabs-glider {
  left: 0%;
  background: var(--color-primary-gradient);
  box-shadow: 0 0 12px rgba(91, 108, 249, 0.55);
}

#features-tab-2:checked ~ .tabs-bar .tabs-glider {
  left: 25%;
  background: linear-gradient(90deg, #10b981 0%, #34d399 100%);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.55);
}

#features-tab-3:checked ~ .tabs-bar .tabs-glider {
  left: 50%;
  background: linear-gradient(90deg, #f59e0b 0%, #fbbf24 100%);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.55);
}

#features-tab-4:checked ~ .tabs-bar .tabs-glider {
  left: 75%;
  background: linear-gradient(90deg, #ec4899 0%, #f472b6 100%);
  box-shadow: 0 0 12px rgba(236, 72, 153, 0.55);
}

.tab-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  background: var(--color-primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tab-title.tab-success {
  background: linear-gradient(10deg, #10b981, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tab-title.tab-warning {
  background: linear-gradient(10deg, #ec4899, #f472b6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tab-title.tab-default {
  background: linear-gradient(10deg, #f59e0b, #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tab-panel p {
  color: #9099b5;
  font-size: 1rem;
  line-height: 1.7;
}

.tab-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.tab-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  color: #c4cbe0;
  font-size: 0.9375rem;
}

.tab-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

@media (max-width: 520px) {
  .tabs-content {
    padding: 24px;
  }

  .tab-panel {
    inset: 24px;
  }

  .tab-label {
    font-size: 0.625rem;
    letter-spacing: 0.08em;
    padding: 16px 4px 14px;
  }

  .tab-title {
    font-size: 1.375rem;
  }

  .tabs-content {
    min-height: 300px;
  }
}

/* ── CodePen-style header navigation (exact replica of the "CSS Tabs" pen,
   used as the site's page-switcher) ── */
.codepen-nav {
  position: relative;
  display: flex;
  align-items: center;
}

.codepen-nav-inner {
  position: relative;
  display: flex;
  background: hsl(232deg 6% 17%);
  border-radius: 10px;
  box-shadow: 0 2px 3px rgb(10 10 10 / 25%), 0 0 0 1px rgb(10 10 10 / 25%);
  overflow: hidden;
}

.codepen-nav .nav-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 0;
  min-width: 92px;
  padding: 13px 18px;
  border: none;
  border-right: 1px solid rgba(0, 0, 0, 0.35);
  color: #e7e9f5;
  background: transparent;
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  font-family: 'Oswald', 'Roboto Condensed', sans-serif;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.1666666667em;
  cursor: pointer;
  transition: color 0.3s ease;
  z-index: 2;
}

.codepen-nav .nav-tab:last-child {
  border-right: none;
}

.codepen-nav .nav-tab:hover {
  color: #fff;
  text-decoration: none;
}

.codepen-nav .nav-tab.tab-primary.active {
  color: deepskyblue;
}

.codepen-nav .nav-tab.tab-success.active {
  color: #51a14c;
}

.codepen-nav .nav-tab.tab-default.active {
  color: #ffaa75;
}

.codepen-nav .nav-tab.tab-warning.active {
  color: #ffadfa;
}

.codepen-nav .nav-glider {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 25%;
  height: 3px;
  background: linear-gradient(
    113deg,
    hsl(260deg 100% 64%) 0%,
    hsl(190deg 100% 55%) 100%
  );
  box-shadow: 0px 0px 8px 0px hsl(262deg 100% 70% / 70%);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 3;
}

[data-page='features'] .codepen-nav .nav-glider {
  left: 0%;
  background: linear-gradient(
    113deg,
    hsl(260deg 100% 64%) 0%,
    hsl(190deg 100% 55%) 100%
  );
  box-shadow: 0px 0px 8px 0px hsl(262deg 100% 70% / 70%);
}

[data-page='security'] .codepen-nav .nav-glider {
  left: 25%;
  background: linear-gradient(90deg, #51a14c 0%, #10c33e 100%);
  box-shadow: 0px 0px 8px 0px rgba(47, 187, 12, 0.62);
}

[data-page='download'] .codepen-nav .nav-glider {
  left: 50%;
  background: linear-gradient(
    90deg,
    #faffcc 0%,
    #f5eea3 10%,
    #ffe48a 40%,
    #ffb54d 65%,
    #ff974d 85%,
    #ff8052 100%
  );
  box-shadow: 0px 0px 8px 0px hsl(17.72deg 100% 70% / 70%);
}

[data-page='contact'] .codepen-nav .nav-glider {
  left: 75%;
  background: linear-gradient(90deg, #b9326f 0%, #ff5ddc 100%);
  box-shadow: 0px 0px 8px 0px rgba(231, 13, 93, 0.57);
}

[data-page='home'] .codepen-nav .nav-glider {
  opacity: 0;
}

@media (max-width: 680px) {
  .codepen-nav-inner {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    border-radius: 10px;
  }

  .codepen-nav .nav-tab {
    flex: 0 0 auto;
    width: 100%;
    justify-content: flex-start;
    border-right: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.35);
  }

  .codepen-nav .nav-tab:last-child {
    border-bottom: none;
  }

  .codepen-nav .nav-glider {
    display: none;
  }
}