/* =====================================================
   peek docs — Refined Design System
   ===================================================== */

:root {
  /* Core palette - warm, sophisticated */
  --bg: #faf9f7;
  --bg-elevated: #ffffff;
  --fg: #1a1a1a;
  --fg-muted: #6b6b6b;
  --fg-subtle: #9a9a9a;
  --border: #e8e6e3;
  --border-subtle: #f0eeeb;
  --accent: #4f46e5;
  --accent-soft: rgba(79, 70, 229, 0.1);
  --accent-glow: rgba(79, 70, 229, 0.15);
  
  /* Code colors */
  --code-bg: #f5f4f2;
  --code-fg: #1a1a1a;
  
  /* Terminal colors */
  --terminal-bg: #0d0d0d;
  --terminal-fg: #e5e5e5;
  --terminal-prompt: #10b981;
  --terminal-command: #60a5fa;
  --terminal-muted: #6b7280;
  
  /* Feature cards */
  --feature-bg: #ffffff;
  --feature-border: #e8e6e3;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 60px var(--accent-glow);
  
  /* Layout */
  --radius: 12px;
  --radius-lg: 16px;
  
  /* Typography */
  --font: 'DM Sans', system-ui, -apple-system, sans-serif;
  --display: 'Libre Baskerville', 'DM Sans', serif;
  --mono: 'JetBrains Mono', 'Berkeley Mono', ui-monospace, monospace;
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --fg: #fafafa;
  --fg-muted: #a3a3a3;
  --fg-subtle: #737373;
  --border: #262626;
  --border-subtle: #1f1f1f;
  --accent: #818cf8;
  --accent-soft: rgba(129, 140, 248, 0.1);
  --accent-glow: rgba(129, 140, 248, 0.2);
  
  --code-bg: #171717;
  --code-fg: #fafafa;
  
  --feature-bg: #141414;
  --feature-border: #262626;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* =====================================================
   Reset & Base
   ===================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* =====================================================
   Flickering Grid Background
   ===================================================== */

#flickering-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.8;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, black 20%, transparent 70%);
}

[data-theme="dark"] #flickering-grid {
  opacity: 1;
}

/* =====================================================
   Navigation
   ===================================================== */

nav {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background: rgba(250, 249, 247, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
}

[data-theme="dark"] nav {
  background: rgba(10, 10, 10, 0.85);
}

.logo {
  font-family: var(--display);
  font-size: 22px;
  font-style: italic;
  font-weight: 400;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.04em;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.7;
}

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

.nav-links a:not(.github-star) {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:not(.github-star):hover {
  color: var(--fg);
}

#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--fg-muted);
  transition: color 0.2s, transform 0.2s;
  border-radius: 8px;
}

#theme-toggle:hover {
  color: var(--fg);
  transform: scale(1.1);
}

.sun { display: none; }
.moon { display: block; }
[data-theme="dark"] .sun { display: block; }
[data-theme="dark"] .moon { display: none; }

/* GitHub Star Button */
.github-star {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--fg);
  color: var(--bg) !important;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.github-star:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  opacity: 0.9;
}

.github-star svg {
  width: 16px;
  height: 16px;
}

/* =====================================================
   Main Content
   ===================================================== */

main {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px;
}

/* =====================================================
   Hero Section
   ===================================================== */

.hero {
  position: relative;
  padding: 100px 0 60px;
  text-align: center;
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-family: var(--display);
  font-size: clamp(56px, 14vw, 100px);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.06em;
  margin-bottom: 20px;
  line-height: 1;
}

.hero-title-text {
  background: linear-gradient(135deg, var(--fg) 0%, var(--fg-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .hero-title-text {
  background: linear-gradient(135deg, #fff 0%, #a3a3a3 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.tagline {
  font-size: 20px;
  color: var(--fg-muted);
  margin-bottom: 48px;
  font-weight: 400;
}

/* Terminal Window in Hero */
.terminal-window {
  background: var(--terminal-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--terminal-muted);
}

.terminal-body {
  padding: 20px 24px;
}

.hero-code pre {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  font-family: var(--mono);
  font-size: 16px;
  color: var(--terminal-fg);
  text-align: left;
}

.hero-code .prompt {
  color: var(--terminal-prompt);
  margin-right: 8px;
  user-select: none;
}

.hero-caption {
  margin-top: 20px;
  font-size: 14px;
  color: var(--fg-subtle);
  letter-spacing: 0.02em;
}

/* =====================================================
   Features Section
   ===================================================== */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 60px 0 80px;
}

.feature {
  background: var(--feature-bg);
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--feature-border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: 12px;
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
}

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

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

@media (max-width: 700px) {
  .features {
    grid-template-columns: 1fr;
  }
}

/* =====================================================
   Docs Sections
   ===================================================== */

.docs {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}

.docs h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.section-subtitle {
  font-size: 16px;
  color: var(--fg-muted);
  margin-bottom: 40px;
}

.docs h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 40px 0 20px;
  color: var(--fg);
}

/* Steps */
.step {
  display: flex;
  gap: 24px;
  margin-bottom: 36px;
}

.step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--fg);
  color: var(--bg);
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
}

.step-content {
  flex: 1;
}

.step-content > p {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 14px;
  font-weight: 500;
}

/* Code Blocks */
pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 20px 24px;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 14px;
  overflow-x: auto;
  border: 1px solid var(--border);
  line-height: 1.7;
}

code {
  font-family: var(--mono);
}

.kw { color: #c084fc; }
.str { color: #4ade80; }
.num { color: #fbbf24; }
.comment { color: var(--fg-subtle); }
.prompt { color: var(--terminal-prompt); user-select: none; }
.output { color: var(--fg-muted); }

/* CLI Reference */
.cli-ref {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cli-cmd {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background: var(--code-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: background 0.2s;
}

.cli-cmd:hover {
  background: var(--border-subtle);
}

.cli-cmd code {
  font-size: 14px;
  color: var(--fg);
}

.cli-cmd span {
  font-size: 13px;
  color: var(--fg-muted);
}

/* =====================================================
   Terminal Contact Form
   ===================================================== */

.contact-section {
  padding-bottom: 100px;
}

.terminal-form-wrapper {
  perspective: 1000px;
}

.terminal-form {
  background: var(--terminal-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 80px rgba(79, 70, 229, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transform: rotateX(2deg);
  transition: transform 0.4s ease;
}

.terminal-form:hover {
  transform: rotateX(0deg);
}

.terminal-form .terminal-header {
  padding: 16px 20px;
}

.terminal-form-body {
  padding: 28px 24px;
}

.terminal-line {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 14px;
}

.terminal-line .prompt {
  color: var(--terminal-prompt);
  font-weight: 500;
}

.terminal-line .command {
  color: var(--terminal-command);
}

.terminal-line input,
.terminal-line select,
.terminal-line textarea {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--terminal-fg);
  font-family: var(--mono);
  font-size: 14px;
  padding: 6px 0;
  outline: none;
  transition: border-color 0.2s;
}

.terminal-line input:focus,
.terminal-line select:focus,
.terminal-line textarea:focus {
  border-bottom-color: var(--accent);
}

.terminal-line input::placeholder,
.terminal-line textarea::placeholder {
  color: var(--terminal-muted);
}

.terminal-line select {
  cursor: pointer;
  max-width: 140px;
}

.terminal-line select option {
  background: var(--terminal-bg);
  color: var(--terminal-fg);
}

.terminal-line-message {
  align-items: flex-start;
  flex-wrap: wrap;
}

.terminal-line-message textarea {
  width: 100%;
  min-height: 80px;
  resize: vertical;
  margin-top: 8px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
}

.terminal-submit-line {
  margin-top: 24px;
  margin-bottom: 0;
}

.terminal-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--terminal-prompt);
  color: var(--terminal-prompt);
  font-family: var(--mono);
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.terminal-submit:hover {
  background: rgba(16, 185, 129, 0.1);
  transform: translateX(4px);
}

.submit-arrow {
  transition: transform 0.2s;
}

.terminal-submit:hover .submit-arrow {
  transform: translateX(4px);
}

.submit-hint {
  color: var(--terminal-muted);
  font-size: 12px;
  margin-left: 12px;
}

.terminal-status {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 13px;
  opacity: 0;
  transition: opacity 0.3s;
}

.terminal-status.visible {
  opacity: 1;
}

.status-pending { color: var(--terminal-command); }
.status-success { color: var(--terminal-prompt); }
.status-error { color: #ef4444; }

/* =====================================================
   Problem Section
   ===================================================== */

.problem-section {
  padding: 60px 0;
}

.problem-box {
  background: var(--terminal-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.problem-box pre {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  color: var(--terminal-fg);
}

.problem-box .output {
  color: var(--fg-subtle);
}

/* =====================================================
   Tabs
   ===================================================== */

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab {
  background: var(--code-bg);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.tab:hover {
  background: var(--border-subtle);
}

.tab.active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.tab-content {
  display: none;
}

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

/* =====================================================
   Workflow Steps
   ===================================================== */

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 40px 0;
}

@media (max-width: 700px) {
  .workflow-steps {
    grid-template-columns: 1fr;
  }
}

.workflow-step {
  background: var(--feature-bg);
  border: 1px solid var(--feature-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.workflow-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.workflow-step h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg);
}

.workflow-step p {
  font-size: 14px;
  color: var(--fg-muted);
  margin-top: 12px;
}

.workflow-step pre {
  margin: 0;
  font-size: 13px;
}

/* =====================================================
   CLI Groups
   ===================================================== */

.cli-group {
  margin-bottom: 32px;
}

.cli-group h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

/* =====================================================
   Framework Cards
   ===================================================== */

.framework-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}

@media (max-width: 700px) {
  .framework-cards {
    grid-template-columns: 1fr;
  }
}

.framework-card {
  background: var(--feature-bg);
  border: 1px solid var(--feature-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.framework-icon {
  color: var(--accent);
  margin-bottom: 16px;
}

.framework-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--fg);
}

.framework-card > p {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 20px;
}

.framework-card pre {
  font-size: 13px;
}

/* =====================================================
   Footer
   ===================================================== */

.footer-tagline {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 20px;
}

footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 60px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer-logo {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.footer-links {
  margin-bottom: 20px;
}

.footer-links a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-sep {
  color: var(--border);
  margin: 0 16px;
}

.footer-license {
  font-size: 13px;
  color: var(--fg-subtle);
}

/* =====================================================
   Animations
   ===================================================== */

@keyframes fade-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-content {
  animation: fade-in 0.8s ease-out;
}

.features .feature {
  animation: fade-in 0.6s ease-out backwards;
}

.features .feature:nth-child(1) { animation-delay: 0.1s; }
.features .feature:nth-child(2) { animation-delay: 0.2s; }
.features .feature:nth-child(3) { animation-delay: 0.3s; }

/* =====================================================
   Responsive
   ===================================================== */

@media (max-width: 768px) {
  nav {
    padding: 14px 20px;
  }
  
  .nav-links {
    gap: 16px;
  }
  
  .nav-links a:not(.github-star):not(:last-of-type) {
    display: none;
  }
  
  main {
    padding: 0 20px;
  }
  
  .hero {
    padding: 80px 0 40px;
    min-height: auto;
  }
  
  .tagline {
    font-size: 17px;
    margin-bottom: 36px;
  }
  
  .terminal-form {
    transform: none;
  }
  
  .submit-hint {
    display: none;
  }
}

/* =====================================================
   Scrollbar
   ===================================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--fg-subtle);
}

/* =====================================================
   Selection
   ===================================================== */

::selection {
  background: var(--accent);
  color: white;
}