/* ==========================================================================
   NovaAI stylesheet

   1. Variables and base
   2. Layout (header, footer, sections)
   3. Components (buttons, cards, forms, tags)
   4. Pages (home, pricing, blog, dashboard, tools)
   5. Animations
   6. Responsive
   ========================================================================== */


/* 1. Variables and base
   -------------------------------------------------------------------------- */

:root {
  --bg: #070a1f;
  --primary: #8b5cf6;
  --accent: #38bdf8;
  --text: #e8ebff;
  --muted: #9aa3d6;
  --glass: rgba(20, 24, 64, 0.55);
  --border: rgba(139, 92, 246, 0.28);
  --danger: #fb7185;
  --success: #4ade80;

  --gradient-text: linear-gradient(90deg, var(--primary), var(--accent));
  --gradient-button: linear-gradient(90deg, #7c3aed, #2563eb);

  --max-width: 1150px;
  --radius: 18px;
}

* {
  box-sizing: border-box;
  margin: 0;
}

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

body {
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 700px at 80% -10%, #2a1565, transparent),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 'Segoe UI', system-ui, sans-serif;
}

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

h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.1;
}

h2 {
  margin-bottom: 14px;
}

ul {
  padding: 0;
}

li {
  margin: 6px 0;
  list-style: none;
}

img,
svg,
video {
  max-width: 100%;
}

img {
  border-radius: 12px;
}

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

/* the animated canvas sits behind everything */
#bg3d {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 30px 18px 60px;
}

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

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


/* 2. Layout
   -------------------------------------------------------------------------- */

.glass {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
}

/* header */

.site-header {
  position: sticky;
  top: 12px;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  max-width: var(--max-width);
  margin: 12px auto;
  padding: 12px 22px;
}

.logo {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.site-nav {
  order: 3;
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  gap: 16px;
}

.site-nav a,
.app-nav a {
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a.active,
.app-nav a:hover,
.app-nav a.active {
  color: #fff;
}

.auth-links {
  order: 4;
}

.burger {
  display: none;
  order: 2;
  margin-left: auto;
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font-size: 1.3rem;
  cursor: pointer;
}

/* sub navigation shown on dashboard pages */

.app-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 20px;
}

/* footer */

.site-footer {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto 20px;
  padding: 32px;
  color: var(--muted);
  text-align: left;
}

.site-footer b {
  display: block;
  margin-bottom: 8px;
}

.site-footer a:not(.logo) {
  display: block;
  margin: 4px 0;
  color: var(--muted);
}

.site-footer .copyright {
  grid-column: 1 / -1;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
}

/* generic page blocks */

.hero {
  max-width: 680px;
  padding: 80px 0 50px;
}

.hero p {
  margin: 18px 0 26px;
  color: var(--muted);
  font-size: 1.15rem;
}

.hero.centered {
  margin: 0 auto;
  padding-bottom: 20px;
  text-align: center;
}

.section-title {
  margin: 56px 0 6px;
  font-size: 1.8rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  padding: 26px;
  text-align: center;
}

.stats b {
  display: block;
  font-size: 2.2rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stats span {
  color: var(--muted);
}

.cta {
  margin-top: 50px;
  padding: 60px 20px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.25), rgba(37, 99, 235, 0.2));
  text-align: center;
}

.faq {
  display: grid;
  gap: 12px;
  max-width: 760px;
}

.faq details {
  padding: 16px 20px;
}

.faq summary {
  font-weight: 600;
  cursor: pointer;
}

.faq details p {
  margin-top: 8px;
  color: var(--muted);
}


/* 3. Components
   -------------------------------------------------------------------------- */

/* buttons */

.btn {
  display: inline-block;
  padding: 11px 24px;
  border: 0;
  border-radius: 12px;
  background: var(--gradient-button);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.35);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.25s;
}

.btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

.btn-outline {
  border: 1px solid var(--border);
  background: transparent;
  box-shadow: none;
}

.btn-block {
  width: 100%;
}

/* cards */

.card {
  padding: 22px;
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
}

.card p {
  color: var(--muted);
}

.stat-value {
  font-size: 2.2rem;
  font-weight: 800;
}

.icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.5), rgba(37, 99, 235, 0.5));
  font-weight: 700;
}

.step-num {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: var(--gradient-button);
  font-weight: 800;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 99px;
  background: rgba(139, 92, 246, 0.25);
  font-size: 0.8rem;
}

/* forms */

input,
textarea,
select {
  width: 100%;
  margin: 6px 0 14px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(8, 10, 34, 0.7);
  color: var(--text);
  font: inherit;
}

label {
  color: var(--muted);
  font-size: 0.9rem;
}

.form {
  max-width: 440px;
  margin: 40px auto;
  padding: 30px;
}

.form h1 {
  margin-bottom: 20px;
  font-size: 2rem;
}

.form-links {
  margin-top: 4px;
  text-align: center;
}

.msg {
  min-height: 22px;
  margin-bottom: 10px;
  font-size: 0.92rem;
}

.msg.error {
  color: var(--danger);
}

.msg.success {
  color: var(--success);
}

.output {
  min-height: 80px;
  margin-top: 16px;
  padding: 18px;
  white-space: pre-wrap;
}


/* 4. Pages
   -------------------------------------------------------------------------- */

/* home: tools, playground, workflow builder */

.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.playground {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 14px;
}

.playground .output {
  min-height: 200px;
  margin: 0;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}

.chip {
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 99px;
  background: rgba(139, 92, 246, 0.15);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.chip:hover {
  background: rgba(139, 92, 246, 0.4);
}

.workflow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-height: 76px;
  padding: 18px;
  border: 1px dashed var(--border);
  border-radius: 14px;
}

.node {
  padding: 10px 18px;
  border: 1px solid var(--primary);
  border-radius: 12px;
  background: rgba(20, 24, 64, 0.8);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: 0.3s;
}

.node.active {
  background: var(--gradient-button);
  box-shadow: 0 0 24px rgba(124, 58, 237, 0.7);
  transform: scale(1.08);
}

.arrow {
  color: var(--accent);
}

.workflow-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
}

/* pricing */

.billing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
}

.switch input {
  width: 0;
  height: 0;
  opacity: 0;
}

.switch i {
  position: absolute;
  inset: 0;
  border: 1px solid var(--border);
  border-radius: 99px;
  background: rgba(139, 92, 246, 0.35);
  cursor: pointer;
  transition: 0.3s;
}

.switch i::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: 0.3s;
}

.switch input:checked + i::before {
  transform: translateX(24px);
}

.plans {
  align-items: stretch;
  margin-top: 30px;
}

.plan {
  position: relative;
  display: flex;
  flex-direction: column;
}

.plan .btn {
  margin-top: auto;
}

.plan-popular {
  border-color: var(--primary);
  box-shadow: 0 0 50px rgba(124, 58, 237, 0.35);
  transform: scale(1.03);
}

.plan-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  padding: 3px 14px;
  border-radius: 99px;
  background: var(--gradient-button);
  font-size: 0.78rem;
  font-weight: 700;
  transform: translateX(-50%);
}

.plan-features {
  margin: 16px 0 22px;
}

.plan-features li {
  color: var(--muted);
}

.price {
  font-size: 2.4rem;
  font-weight: 800;
}

.price small {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 400;
}

.compare-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}

.compare-table th,
.compare-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.compare-table th {
  color: var(--accent);
}

.compare-table td:first-child {
  color: var(--muted);
}

/* blog */

.post-card {
  display: block;
  color: var(--text);
}

.post-card h2 {
  margin: 10px 0 8px;
}

.featured-post {
  display: block;
  margin-bottom: 10px;
  padding: 34px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.25), rgba(37, 99, 235, 0.15));
  color: var(--text);
}

.featured-post h2 {
  font-size: 2rem;
}

.featured-post p {
  margin: 10px 0;
  color: var(--muted);
}

.article {
  max-width: 820px;
  margin-top: 14px;
  padding: 30px 34px;
}

.article h1 {
  margin: 10px 0;
  font-size: 2.2rem;
}

.article p {
  margin-bottom: 16px;
}

/* dashboard and tools */

.chat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 420px;
  padding: 16px;
  overflow: auto;
}

.bubble {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 14px;
  white-space: pre-wrap;
}

.bubble.user {
  align-self: flex-end;
  background: #5b34c9;
}

.bubble.bot {
  background: rgba(255, 255, 255, 0.07);
}

.chat-form {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.chat-form input {
  margin: 0;
}


/* 5. Animations
   -------------------------------------------------------------------------- */

/* .js is added to <html> by head.js, so content stays visible without scripting */
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s, transform 0.7s;
}

.js .reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}


/* 6. Responsive
   -------------------------------------------------------------------------- */

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

  .site-footer {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 820px) {
  .site-header {
    top: 8px;
    margin: 8px;
    padding: 10px 16px;
  }

  .burger {
    display: block;
  }

  .site-nav,
  .auth-links {
    display: none;
    width: 100%;
  }

  .site-header.open .site-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .site-header.open .site-nav a {
    padding: 10px 4px;
  }

  .site-header.open .auth-links {
    display: block;
    padding-bottom: 6px;
  }
}

@media (max-width: 700px) {
  main {
    padding: 18px 14px 40px;
  }

  .hero {
    padding: 40px 0 24px;
  }

  .hero .btn {
    display: block;
    margin: 0 0 10px;
    text-align: center;
  }

  .section-title {
    margin-top: 40px;
    font-size: 1.5rem;
  }

  .card {
    padding: 18px;
  }

  .stat-value {
    font-size: 1.8rem;
  }

  .form {
    margin: 20px auto;
    padding: 22px;
  }

  .cta {
    padding: 36px 16px;
  }

  .btn {
    padding: 11px 18px;
  }

  .plan-popular {
    transform: none;
  }

  .featured-post {
    padding: 22px;
  }

  .chat {
    height: 60vh;
  }

  .bubble {
    max-width: 92%;
  }

  .app-nav {
    flex-wrap: nowrap;
    padding-bottom: 6px;
    overflow-x: auto;
    white-space: nowrap;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  /* 16px stops iOS from zooming into inputs */
  input,
  textarea,
  select {
    font-size: 16px;
  }
}

@media (max-width: 600px) {
  .site-header {
    border-radius: 14px;
  }
}

@media (max-width: 380px) {
  h1 {
    font-size: 1.8rem;
  }

  .stats b {
    font-size: 1.7rem;
  }
}