/* Design System - Based on cursor/DESIGN.md */
:root {
  /* Colors */
  --color-primary: #f54e00;
  --color-primary-active: #d04200;
  --color-ink: #26251e;
  --color-body: #5a5852;
  --color-body-strong: #26251e;
  --color-muted: #807d72;
  --color-muted-soft: #a09c92;
  --color-hairline: #e6e5e0;
  --color-hairline-soft: #efeee8;
  --color-hairline-strong: #cfcdc4;
  --color-canvas: #f7f7f4;
  --color-canvas-soft: #fafaf7;
  --color-surface-card: #ffffff;
  --color-surface-strong: #e6e5e0;
  --color-on-primary: #ffffff;
  
  /* Timeline Pastel Palette (AI Action Stages) */
  --timeline-thinking: #dfa88f;
  --timeline-grep: #9fc9a2;
  --timeline-read: #9fbbe0;
  --timeline-edit: #c0a8dd;
  --timeline-done: #c08532;
  
  /* Semantic */
  --semantic-success: #1f8a65;
  --semantic-error: #cf2d56;

  /* Typography Fonts */
  --font-family-display: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-code: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--color-canvas);
  color: var(--color-body);
  font-family: var(--font-family-body);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Layout Spacing */
section {
  padding: 80px 0; /* Generous 80px rhythm */
  border-bottom: 1px solid var(--color-hairline-soft);
}

/* Header & Nav */
header {
  height: 64px;
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--color-ink);
  letter-spacing: -0.5px;
}

.logo-img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 1px solid var(--color-hairline-strong);
}

.logo-text {
  font-weight: 600;
}

.accent-text {
  color: var(--color-primary);
}

nav {
  display: flex;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-body);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--color-ink);
}

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

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-ink);
  font-size: 1.25rem;
  cursor: pointer;
}

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px; /* rounded.md */
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: background-color 0.15s ease, transform 0.1s ease;
  height: 40px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: 10px 18px;
}

.btn-primary:hover {
  background-color: var(--color-primary-active);
}

.btn-secondary {
  background-color: var(--color-surface-card);
  color: var(--color-ink);
  border: 1px solid var(--color-hairline-strong);
  padding: 9px 17px;
}

.btn-secondary:hover {
  background-color: var(--color-canvas-soft);
}

.btn-download {
  background-color: var(--color-ink);
  color: var(--color-canvas);
  padding: 12px 20px;
  height: 44px;
}

.btn-download:hover {
  opacity: 0.95;
}

.btn-outline {
  background: transparent;
  color: var(--color-body);
  border: 1px solid var(--color-hairline);
  padding: 9px 17px;
}

.btn-outline:hover {
  border-color: var(--color-hairline-strong);
  color: var(--color-ink);
}

/* Hero Section */
.hero-section {
  padding: 80px 0;
  background-color: var(--color-canvas);
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.badge {
  background-color: var(--color-surface-strong);
  color: var(--color-ink);
  padding: 4px 10px;
  border-radius: 9999px; /* rounded.pill */
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.88px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 72px; /* display-mega */
  font-weight: 400; /* Magazine voice - weight 400 */
  line-height: 1.1;
  letter-spacing: -2.16px; /* negative letter-spacing */
  color: var(--color-ink);
  margin-bottom: 24px;
  max-width: 900px;
}

.gradient-text {
  color: var(--color-primary);
}

.hero-description {
  color: var(--color-body);
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 32px;
  max-width: 680px;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 60px;
}

.hero-visual {
  width: 100%;
  max-width: 960px;
}

/* Features Section */
.features-section {
  background-color: var(--color-canvas);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-title {
  font-size: 36px; /* display-lg */
  font-weight: 400; /* weight 400 */
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--color-body);
  font-size: 16px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background-color: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  padding: 24px;
  border-radius: 12px; /* rounded.lg */
  transition: border-color 0.15s ease;
  text-align: left;
}

.feature-card:hover {
  border-color: var(--color-hairline-strong);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background-color: var(--color-canvas-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 20px;
  border: 1px solid var(--color-hairline-soft);
}

.feature-card h3 {
  font-size: 18px; /* title-md */
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--color-body);
  font-size: 14px;
  line-height: 1.5;
}

/* Commands Section */
.commands-section {
  background-color: var(--color-canvas);
}

.tabs-container {
  background-color: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: 12px;
  padding: 32px;
}

.tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-hairline-soft);
  padding-bottom: 12px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--color-body);
  font-size: 16px;
  font-weight: 500;
  padding: 8px 16px;
  cursor: pointer;
  transition: color 0.15s ease;
  position: relative;
}

.tab-btn:hover {
  color: var(--color-ink);
}

.tab-btn.active {
  color: var(--color-primary);
}

.tab-btn.active::after {
  content: "";
  position: absolute;
  bottom: -13px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.command-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.command-item {
  background-color: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline-soft);
  border-radius: 8px;
  padding: 20px;
}

.command-trigger {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.command-trigger code {
  background-color: var(--color-surface-strong);
  color: var(--color-ink);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-family-code);
  font-size: 13px;
}

.cmd-alias {
  font-size: 13px;
  color: var(--color-muted);
  font-weight: normal;
  margin-left: 8px;
}

.admin-badge {
  background-color: rgba(207, 45, 86, 0.08);
  color: var(--semantic-error);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 8px;
  font-weight: 600;
}

.command-desc {
  color: var(--color-body);
  font-size: 14px;
}

/* Simulator Section */
.simulator-section {
  background-color: var(--color-canvas);
}

/* Clean Editorial Discord Mockup */
.discord-mockup {
  display: flex;
  max-width: 960px;
  height: 540px;
  background-color: var(--color-surface-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--color-hairline-strong);
  margin: 0 auto;
}

.discord-sidebar {
  width: 64px;
  background-color: var(--color-canvas-soft);
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  border-right: 1px solid var(--color-hairline);
}

.server-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-surface-card);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-body);
  font-size: 1.1rem;
  cursor: pointer;
  border: 1px solid var(--color-hairline);
  transition: all 0.15s ease;
}

.server-icon:hover, .server-icon.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-canvas);
}

.discord-chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface-card);
}

.channel-header {
  height: 52px;
  border-bottom: 1px solid var(--color-hairline);
  display: flex;
  align-items: center;
  padding: 0 20px;
  font-weight: 500;
  font-size: 14px;
  color: var(--color-ink);
  gap: 8px;
  background-color: var(--color-canvas-soft);
}

.hashtag {
  color: var(--color-muted);
  font-size: 1.15rem;
}

.channel-topic {
  font-size: 13px;
  color: var(--color-muted);
  font-weight: normal;
  border-left: 1px solid var(--color-hairline);
  padding-left: 8px;
}

.chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.message {
  display: flex;
  gap: 16px;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  overflow: hidden;
  background-color: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.message-content {
  flex: 1;
}

.user-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.username {
  font-weight: 600;
  color: var(--color-ink);
  font-size: 14px;
}

.username.bot-name {
  color: var(--color-ink);
}

.bot-badge {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 10px;
  font-weight: 600;
  padding: 1px 4px;
  border-radius: 4px;
}

.timestamp {
  font-size: 12px;
  color: var(--color-muted);
}

.text {
  color: var(--color-body);
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.text code {
  background-color: var(--color-canvas-soft);
  color: var(--color-ink);
  padding: 2px 4px;
  border-radius: 4px;
  font-family: var(--font-family-code);
  font-size: 13px;
  border: 1px solid var(--color-hairline-soft);
}

/* Timeline pill palette - AI Stage visual signature */
.timeline-pill {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.88px;
  border-radius: 9999px;
  padding: 4px 10px;
  margin-bottom: 6px;
  color: var(--color-ink);
  line-height: 1.4;
}

.pill-thinking { background-color: var(--timeline-thinking); }
.pill-grep { background-color: var(--timeline-grep); }
.pill-read { background-color: var(--timeline-read); }
.pill-edit { background-color: var(--timeline-edit); }
.pill-done { background-color: var(--timeline-done); color: var(--color-on-primary); }

/* Discord Rich Embed (Light Clean Style) */
.discord-embed {
  margin-top: 12px;
  border-left: 3px solid var(--color-primary);
  background-color: var(--color-canvas-soft);
  border-radius: 6px;
  padding: 16px;
  max-width: 540px;
  border: 1px solid var(--color-hairline);
  border-left-width: 3px;
}

.embed-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.embed-desc {
  font-size: 13px;
  color: var(--color-body);
  line-height: 1.5;
}

.embed-footer {
  font-size: 11px;
  color: var(--color-muted);
  margin-top: 10px;
}

.discord-buttons-row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.d-btn {
  background-color: var(--color-surface-card);
  color: var(--color-ink);
  border: 1px solid var(--color-hairline-strong);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.1s;
}

.d-btn:hover {
  background-color: var(--color-canvas-soft);
}

.d-btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
}

.d-btn-primary:hover {
  background-color: var(--color-primary-active);
}

.chat-input-area {
  padding: 0 20px 24px;
  background-color: var(--color-surface-card);
}

.input-wrapper {
  background-color: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline-strong);
  border-radius: 8px;
  height: 44px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}

.plus-icon {
  color: var(--color-muted);
  font-size: 1rem;
  cursor: pointer;
  transition: color 0.1s;
}

.plus-icon:hover {
  color: var(--color-ink);
}

.input-wrapper input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-ink);
  font-size: 14px;
  outline: none;
}

.input-wrapper input::placeholder {
  color: var(--color-muted-soft);
}

.send-btn {
  background: transparent;
  border: none;
  color: var(--color-muted);
  font-size: 1rem;
  cursor: pointer;
  transition: color 0.1s;
}

.send-btn:hover {
  color: var(--color-primary);
}

/* Specifications Section */
.spec-section {
  background-color: var(--color-canvas);
}

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

.spec-card {
  background-color: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  padding: 24px;
  border-radius: 12px;
  transition: border-color 0.15s ease;
}

.spec-card:hover {
  border-color: var(--color-hairline-strong);
}

.spec-card h4 {
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.spec-card p {
  color: var(--color-body);
  font-size: 13px;
  line-height: 1.5;
}

/* Pre-footer CTA band */
.cta-band {
  background-color: var(--color-canvas);
  padding: 96px 0; /* 96px padding */
  text-align: center;
  border-bottom: 1px solid var(--color-hairline);
}

.cta-title {
  font-size: 36px; /* display-lg */
  font-weight: 400;
  letter-spacing: -0.72px;
  color: var(--color-ink);
  margin-bottom: 24px;
}

/* Footer Section */
footer {
  background-color: var(--color-canvas);
  padding: 64px 48px; /* 64x48px padding */
}

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

footer p {
  color: var(--color-muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--color-body);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s ease;
}

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

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-canvas);
}

::-webkit-scrollbar-thumb {
  background: var(--color-surface-strong);
  border-radius: 3px;
}

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

/* Responsive Strategies */
@media (max-width: 768px) {
  .hero-title {
    font-size: 40px; /* Collapse mega title */
    letter-spacing: -1px;
  }
  
  .menu-toggle {
    display: block;
  }
  
  nav {
    position: fixed;
    top: 64px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 64px);
    background-color: var(--color-canvas);
    transition: left 0.2s ease;
    padding: 48px 32px;
    border-top: 1px solid var(--color-hairline);
    z-index: 99;
  }
  
  nav.active {
    left: 0;
  }
  
  .nav-links {
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }
  
  .nav-links a {
    font-size: 18px;
  }
  
  .nav-actions {
    display: none;
  }

  .tabs {
    flex-direction: column;
    align-items: stretch;
  }

  .tab-btn.active::after {
    display: none;
  }

  .discord-mockup {
    flex-direction: column;
    height: auto;
  }

  .discord-sidebar {
    width: 100%;
    flex-direction: row;
    height: 60px;
    padding: 0 16px;
    justify-content: flex-start;
    border-right: none;
    border-bottom: 1px solid var(--color-hairline);
  }

  .chat-messages {
    height: 360px;
  }

  .footer-container {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}