/* ============================================
   Quill Programming Language - Site Styles
   tradebuddy.dev Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --page-bg: #0D1117;
  --nav-bg: rgba(13, 17, 23, 0.8);
  --card-bg: #161B22;
  --card-bg-alt: #1C2128;
  --green: #1EB969;
  --blue: #198CD7;
  --text-primary: #E6EDF3;
  --text-secondary: #8B949E;
  --text-tertiary: #6E7681;
  --border: #30363D;
  --code-purple: #D2A8FF;
  --code-orange: #FFA657;
  --red: #F85149;
  --brand-gradient: linear-gradient(135deg, #1EB969, #198CD7);
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1200px;
  --nav-height: 65px;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--page-bg);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--green);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--blue);
}

img { max-width: 100%; }

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-inner {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.nav-logo .logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo .badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--green);
  background: rgba(30, 185, 105, 0.12);
  border-radius: 20px;
  padding: 2px 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links .nav-cta {
  background: var(--green);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  padding: 8px 18px;
  margin-left: 8px;
}

.nav-links .nav-cta:hover {
  background: #1aa35e;
  color: #ffffff;
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ---- Layout ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-content {
  padding-top: calc(var(--nav-height) + 2rem);
  min-height: 100vh;
}

/* ---- Hero ---- */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: -30%;
  width: 160%;
  height: 160%;
  background: radial-gradient(circle at 50% 40%, rgba(30, 185, 105, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30, 185, 105, 0.08);
  border: 1px solid rgba(30, 185, 105, 0.2);
  border-radius: 100px;
  padding: 6px 16px;
  margin-bottom: 32px;
  font-size: 13px;
  font-weight: 600;
  color: var(--green);
}

.hero-eyebrow .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

.hero h1 {
  font-size: 72px;
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 24px;
}

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

.hero h1 .subtitle-line {
  color: var(--text-primary);
  display: block;
  font-size: 72px;
}

.hero .subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 32px;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--green);
  color: #ffffff;
}

.btn-primary:hover {
  background: #1aa35e;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(30, 185, 105, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--green);
  color: #ffffff;
  font-weight: 700;
}

.btn-accent:hover {
  background: #1aa35e;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(30, 185, 105, 0.3);
}

/* ---- Code Panels ---- */
.hero-code {
  max-width: 900px;
  margin: 60px auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.code-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.code-panel-header {
  padding: 12px 16px;
  background: var(--card-bg-alt);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.code-panel-header .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.code-panel pre {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  color: var(--text-primary);
}

/* ---- Section Pattern ---- */
.section-overline {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--blue);
  margin-bottom: 12px;
  text-align: center;
}

.section-title {
  text-align: center;
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Features Grid ---- */
.features {
  padding: 100px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: transform 0.2s, border-color 0.2s;
}

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

.feature-card .icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

/* ---- Quick Start ---- */
.quickstart {
  padding: 100px 0;
}

.quickstart-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  max-width: 700px;
  margin: 24px auto 0;
}

.quickstart-box .code-header {
  padding: 12px 16px;
  background: var(--card-bg-alt);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.quickstart-box pre {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  color: var(--text-primary);
  overflow-x: auto;
}

/* ---- Code Comparison Section ---- */
.comparison {
  padding: 100px 0;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}

/* ---- Interactive Demos ---- */
.demos {
  padding: 100px 0;
}

.demos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.demo-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.demo-card-header {
  padding: 16px 20px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.demo-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--green);
  background: rgba(30, 185, 105, 0.12);
  padding: 3px 10px;
  border-radius: 20px;
}

.demo-card-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.demo-card-body {
  padding: 0 20px 20px;
  flex: 1;
}

.demo-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--page-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.demo-input:focus {
  border-color: var(--green);
}

.demo-input::placeholder {
  color: var(--text-tertiary);
}

.demo-btn {
  padding: 10px 20px;
  background: var(--green);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  margin-top: 10px;
}

.demo-btn:hover {
  background: #1aa35e;
  transform: translateY(-1px);
}

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

.demo-btn-sm {
  padding: 8px 18px;
  margin-top: 0;
  font-size: 18px;
  font-weight: 700;
  min-width: 44px;
}

.demo-btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  margin-top: 10px;
  padding: 8px 16px;
  font-size: 13px;
}

.demo-btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.demo-output {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--page-bg);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.demo-counter {
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: center;
  padding: 10px 0;
}

.demo-count-display {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 700;
  color: var(--text-primary);
  min-width: 80px;
  text-align: center;
}

.demo-todo-row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.demo-todo-row .demo-input {
  flex: 1;
}

.demo-todo-row .demo-btn {
  margin-top: 0;
  white-space: nowrap;
}

.demo-todo-list {
  list-style: none;
  margin-top: 12px;
  max-height: 140px;
  overflow-y: auto;
}

.demo-todo-list li {
  padding: 8px 12px;
  background: var(--page-bg);
  border-radius: 6px;
  margin-bottom: 4px;
  font-size: 14px;
  color: var(--text-primary);
  cursor: pointer;
  transition: opacity 0.2s;
}

.demo-todo-list li:hover {
  opacity: 0.7;
  text-decoration: line-through;
}

.demo-todo-count {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.demo-color-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.demo-color-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s;
}

.demo-color-btn:hover {
  transform: scale(1.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.demo-color-box {
  width: 100%;
  height: 60px;
  border-radius: 10px;
  margin-top: 12px;
  background-color: #1EB969;
  transition: background-color 0.3s;
}

.demo-color-label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
}

.demo-card-code {
  border-top: 1px solid var(--border);
  background: var(--card-bg-alt);
  padding: 12px 16px;
}

.demo-card-code pre {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-primary);
  overflow-x: auto;
}

.demo-footnote {
  text-align: center;
  margin-top: 32px;
  font-size: 14px;
  color: var(--text-tertiary);
}

.demo-footnote code {
  font-family: var(--font-mono);
  background: rgba(30, 185, 105, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  color: var(--green);
}

/* ---- Footer ---- */
.footer {
  padding: 32px 24px;
  border-top: 1px solid var(--border);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
}

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

.footer p {
  color: var(--text-tertiary);
  font-size: 14px;
}

/* ---- Syntax Highlighting ---- */
.kw { color: #D2A8FF; }
.str { color: #FFA657; }
.num { color: #79C0FF; }
.fn { color: #D2A8FF; }
.cmt { color: #1EB969; font-style: italic; }
.op { color: #79C0FF; }
.bool { color: #F85149; }

/* ---- Documentation Layout ---- */
.docs-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 48px;
  padding-top: calc(var(--nav-height) + 32px);
  min-height: 100vh;
}

.docs-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 32px);
  height: fit-content;
  max-height: calc(100vh - var(--nav-height) - 64px);
  overflow-y: auto;
  padding: 24px 0;
}

.docs-sidebar h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-tertiary);
  margin-bottom: 12px;
  margin-top: 24px;
  font-weight: 700;
}

.docs-sidebar h4:first-child {
  margin-top: 0;
}

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

.docs-sidebar li a {
  display: block;
  padding: 6px 12px;
  color: var(--text-secondary);
  font-size: 14px;
  border-radius: 8px;
  transition: all 0.15s;
}

.docs-sidebar li a:hover,
.docs-sidebar li a.active {
  color: var(--text-primary);
  background: rgba(30, 185, 105, 0.1);
}

.docs-content {
  padding: 24px 0 80px;
  max-width: 800px;
}

.docs-content h1 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.docs-content h2 {
  font-size: 28px;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.docs-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.docs-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 15px;
}

.docs-content ul, .docs-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
  color: var(--text-secondary);
}

.docs-content li {
  margin-bottom: 6px;
  font-size: 15px;
}

.docs-content strong {
  color: var(--text-primary);
}

/* Inline code */
.docs-content code,
p code,
li code,
td code {
  font-family: var(--font-mono);
  background: rgba(30, 185, 105, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  color: var(--green);
}

/* Code blocks */
pre.code-block,
.docs-content pre {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  margin-bottom: 24px;
  color: var(--text-primary);
}

pre.code-block code,
.docs-content pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
}

/* Docs table */
.docs-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.docs-content th {
  text-align: left;
  padding: 10px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
}

.docs-content td {
  padding: 10px 16px;
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
}

/* Callout */
.callout {
  padding: 16px 20px;
  border-radius: 8px;
  margin-bottom: 24px;
  font-size: 14px;
  line-height: 1.6;
}

.callout-info {
  background: rgba(25, 140, 215, 0.1);
  border-left: 3px solid var(--blue);
}

.callout-tip {
  background: rgba(30, 185, 105, 0.1);
  border-left: 3px solid var(--green);
}

.callout-warn {
  background: rgba(248, 81, 73, 0.1);
  border-left: 3px solid var(--red);
}

/* ---- Playground ---- */
.playground-container {
  height: calc(100vh - var(--nav-height));
  margin-top: var(--nav-height);
  display: flex;
  flex-direction: column;
}

.playground-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--card-bg-alt);
  border-bottom: 1px solid var(--border);
}

.playground-toolbar select {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
}

.playground-toolbar .spacer {
  flex: 1;
}

.playground-toolbar .shortcut-hint {
  color: var(--text-tertiary);
  font-size: 13px;
}

.playground-panels {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 0;
}

.playground-editor-wrapper {
  display: flex;
  border-right: 1px solid var(--border);
  background: var(--card-bg);
  overflow: hidden;
}

.line-numbers {
  padding: 16px 8px 16px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-tertiary);
  text-align: right;
  user-select: none;
  min-width: 3rem;
  overflow: hidden;
}

.playground-editor {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  padding: 16px;
  resize: none;
  outline: none;
  overflow-y: auto;
  tab-size: 2;
  white-space: pre;
}

.playground-output-wrapper {
  display: flex;
  flex-direction: column;
  background: var(--page-bg);
}

.output-header {
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border);
  background: var(--card-bg-alt);
}

.playground-output {
  flex: 1;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.output-line { margin-bottom: 2px; }
.output-error { color: var(--red); }
.output-success { color: var(--green); }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .hero h1 { font-size: 48px; }
  .hero h1 .subtitle-line { font-size: 48px; }
  .section-title { font-size: 32px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .comparison-grid { grid-template-columns: 1fr; }
  .demos-grid { grid-template-columns: 1fr; }
  .hero-code { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { display: none; }
  .playground-panels { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
  .playground-editor-wrapper { border-right: none; border-bottom: 1px solid var(--border); }
}

@media (max-width: 640px) {
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 36px; }
  .hero h1 .subtitle-line { font-size: 36px; }
  .hero .subtitle { font-size: 16px; line-height: 26px; }
  .features-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--page-bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 8px;
  }
  .nav-hamburger { display: block; }
  .container { padding: 0 16px; }
  .footer .container { flex-direction: column; gap: 16px; text-align: center; }
}