:root {
  --bg-light: #f8faff;
  --bg-gradient-hero: linear-gradient(135deg, #0f172a, #1e3a8a);
  --primary: #3949ff;
  --primary-hover: #2f38d6;
  --text-dark: #111827;
  --text-muted: #6b7280;
  --card-bg: #ffffff;
  --radius: 14px;
  --shadow-soft: 0 10px 30px rgba(16, 24, 40, 0.06);
  --shadow-hover: 0 12px 40px rgba(16, 24, 40, 0.1);
}

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

body {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  min-height: 100vh;
}
h1 {
  font-size: 2.5rem;
}
@media screen and (max-width: 608px) {
  h1 {
    font-size: 2rem;
  }
}
h2,
h3 {
  color: rgb(1, 1, 150);
}
h3 {
  margin: 2rem 0 1rem;
}
p,
ul li {
  font-size: 1.2rem;
}

.logo {
  width: 12rem;
  height: auto;
  margin-top: -1rem;
}

/* ================================
   LAYOUT
================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

/* ================================
   HERO
================================ */
.hero {
  position: relative;
  background: var(--bg-gradient-hero);
  color: white;
  text-align: center;
  padding: 10px 20px;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 750px;
  margin: 0 auto;
  padding: 80px 0;
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: 30px;
}

/* ================================
   BUTTONS
================================ */
.btn-primary {
  display: inline-block;
  padding: 14px 30px;
  font-weight: 600;
  transition: 0.25s ease;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
}

.card-btn,
.btn-primary {
  color: white;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: bold;
  background: var(--primary);
}
.card-btn {
  padding: 8px 16px;
  font-weight: bold;
  margin-top: 3rem;
}

/* ================================
   CARDS
================================ */
.card,
.text-card {
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  transition: 0.25s ease;
  color: white;
}
.card {
  background: var(--bg-gradient-hero);
}

.text-card {
  background: var(--text-muted);
}
.card h3,
.text-card h3 {
  margin: 0;
  color: white;
}
.card p {
  margin-bottom: 1rem;
}

.card:hover,
.text-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

/* ================================
   GRID
================================ */
.grid {
  display: grid;
  gap: 25px;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ================================
   TEXT HELPERS
================================ */
.text-center {
  text-align: center;
}

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

/* ================================
   FOOTER
================================ */
.footer {
  background: #0f172a;
  color: #9ca3af;
  text-align: center;
  padding: 40px 20px;
}
.footer li a {
  text-decoration: none;
  color: var(--card-bg);
}
.footer li a:hover {
  color: var(--primary-hover);
}
.footer-content {
  text-align: left;
}

/* ================================
   SPARKLES
================================ */
.sparkles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.sparkle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, white 0%, rgba(255, 255, 255, 0.2) 100%);
  animation: float 12s linear infinite;
  opacity: 0.8;
}

@keyframes float {
  from {
    transform: translateY(0px);
  }
  to {
    transform: translateY(-60px);
  }
}

/* ================================
   RESPONSIVE
================================ */
@media (min-width: 1024px) {
  .hero h1 {
    font-size: 3rem;
  }
}

/* ================================
   DARK TOOL PAGE MODE
================================ */

.dark-page {
  background: radial-gradient(circle at 20% 20%, #0b1220, #050814 60%);
  color: #e5e7eb;
  min-height: 100vh;
}

/* glass card */
.glass-card {
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4);
}

/* inputs */
.input-dark,
.textarea-dark {
  width: 100%;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: white;
  font-size: 15px;
  transition: 0.2s ease;
}

.input-dark:focus,
.textarea-dark:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.06);
}

.hidden {
  display: none;
}

/* dark button */
.btn-dark {
  background: linear-gradient(90deg, #3949ff, #6f5cff);
  color: white;
  padding: 14px 22px;
  border-radius: 12px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: 0.25s ease;
}

.btn-dark:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(79, 70, 229, 0.35);
}

/* SERP preview */
.serp-dark {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 14px;
  padding: 24px;
}

/* toast dark */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(-5px);
}

/* NAVBAR DARK */
.navbar {
  background: rgba(10, 15, 30, 0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  height: 5rem;
  width: 100%;
}

.nav-container {
  max-width: 1100px;
  margin: auto;
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 14px;
  transition: 0.2s ease;
}

.nav-links a:hover {
  color: white;
}

.nav-cta {
  background: var(--primary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  color: white !important;
}

/* PARTICLES */
.particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  animation: floatParticle 12s linear infinite;
  opacity: 0.7;
}

@keyframes floatParticle {
  from {
    transform: translateY(40vh);
    opacity: 0;
  }
  20% {
    opacity: 0.8;
  }
  to {
    transform: translateY(-60vh);
    opacity: 0;
  }
}

.char-good {
  color: #22c55e;
}

.char-warning {
  color: #facc15;
}

.char-bad {
  color: #ef4444;
}

.small-tip {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.66);
  margin-top: 12px;
}

.variation small {
  color: rgba(255, 255, 255, 0.55);
}

.variation {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  margin-bottom: 8px;
}
.variation .title-text {
  flex: 1;
  color: #e6eefc;
  font-weight: 600;
  margin-right: 10px;
}

.preview-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 10px;
}

/* VALIDATION FOR SCHEMA BUILDER */
.validation-box {
  margin-top: 20px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 12px;
}

.validation-status {
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.05);
  color: #ccc;
  transition: all 0.3s ease;
}

.validation-status.success {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
}

.validation-status.error {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

.validation-status.neutral {
  background: rgba(255, 255, 255, 0.05);
  color: #ccc;
}

.validation-messages {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  padding-left: 18px;
  color: rgba(255, 255, 255, 0.85);
}

.validation-messages li {
  margin-bottom: 6px;
  font-size: 14px;
}

/* ================================
   FAQ PAGE
================================ */

.faq-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
}

.faq-sidebar {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 20px;
  height: fit-content;
  position: sticky;
  top: 100px;
  border: 1px solid var(--primary-hover);
}

.faq-sidebar h3 {
  margin-bottom: 20px;
  color: var(--bg-light);
}

.faq-sidebar ul {
  list-style: none;
}

.faq-sidebar li {
  margin-bottom: 12px;
}

.faq-sidebar button {
  width: 100%;
  background: transparent;
  border: none;
  text-align: left;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: 0.2s ease;
  color: var(--bg-light);
}

.faq-sidebar button:hover,
.faq-sidebar button.active {
  background: var(--primary);
  color: white;
}

.faq-content {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 40px;
  color: white;
  border: 1px solid var(--primary-hover);
}

.faq-item {
  border-bottom: 1px solid #e5e7eb;
  padding: 20px 0;
}

.faq-question {
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  display: none;
  margin-top: 12px;
  color: var(--text-muted);
}

.faq-toggle {
  font-size: 18px;
  font-weight: bold;
}

/* Mobile */

@media (max-width: 900px) {
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .faq-sidebar {
    position: relative;
    top: 0;
  }
}

/* ================================
   FAQ SEARCH
================================ */

.faq-search {
  margin-bottom: 30px;
}

.faq-search input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  font-size: 15px;
  outline: none;
  transition: 0.2s ease;
}

.faq-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(57, 73, 255, 0.1);
}

.faq-no-results {
  margin-top: 20px;
  color: var(--text-muted);
  display: none;
  font-size: 14px;
}

/* BLOG LAYOUT */
.blog-wrapper {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.blog-content {
  flex: 1 1 760px;
  max-width: 760px;
}

.blog-sidebar {
  width: 320px;
  position: sticky;
  top: 100px;
}
.blog-sidebar {
  width: 320px;
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

/* MOBILE FIX */
@media (max-width: 1024px) {
  .blog-wrapper {
    flex-direction: column;
  }

  .blog-content {
    max-width: 100%;
  }

  .blog-sidebar {
    width: 100%;
    position: relative;
    top: 0;
  }
}

.blog-head {
  margin: 3rem 0 1rem;
}
.posts h2,
.posts h3 {
  color: var(--card-bg);
}
.posts h2 {
  padding: 3rem 0 1rem;
}

.posts h3 {
  padding: 0 1rem;
}
.posts ul {
  margin-left: 2rem;
}
.posts p {
  margin: 1rem 0 1.5rem;
}

/* TOC */
.toc-container {
  margin-bottom: 20px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  padding: 10px 14px;
}

.toc-toggle {
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-weight: 600;
  cursor: pointer;
  padding: 10px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toc-content {
  display: none;
  margin-top: 10px;
}

.toc-content.open {
  display: block;
}

.speacial-content {
  background: #0f172a;
  padding: 10px 1rem;
  border-radius: 10px;
  border: 1px solid #1e3a8a;
}
.speacial-content {
  margin: 2rem 0;
}
.speacial-content p strong {
  margin: 1.5rem 0 0;
}

#toc a {
  color: white;
  text-decoration: none;
}