/* Tarsa — live observability for Claude Code */

/* === CSS Variables === */
:root {
  --bg: #08100f;
  --surface: #0f1716;
  --surface-raised: #15201f;
  --border: #1f2d2c;
  --accent: #14b8a6;
  --accent-bright: #75cbbe;
  --fg: #f4faf9;
  --fg-muted: #9ab0ad;
  --fg-subtle: #5a6f6c;

  --radius: 10px;
  --max-width: 1040px;
  --font-heading: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Geist Mono', 'Courier New', monospace;

  --nav-h: 52px;
  --section-pad: 6rem;
}

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

/* === Base === */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Layout === */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 2rem;
}

/* === Typography === */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.15;
  color: var(--fg);
  letter-spacing: -0.02em;
}

h2 { font-size: clamp(1.875rem, 4vw, 2.75rem); font-weight: 800; }
h3 { font-size: 1.0625rem; font-weight: 600; }

p {
  color: var(--fg-muted);
}

a {
  color: var(--accent-bright);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* === Sticky Nav === */
.sticky-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transform: translateY(0);
  transition: transform 0.25s ease;
}

.sticky-nav.nav-hidden {
  transform: translateY(-100%);
}

.nav-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--fg);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.nav-logo img { display: block; }

.nav-logo:hover { color: var(--accent-bright); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover {
  color: var(--fg);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.nav-github {
  color: var(--fg-muted);
  border: 1px solid var(--border);
}

.nav-github:hover {
  border-color: var(--accent) !important;
  color: var(--accent-bright) !important;
}

/* === Section alternating backgrounds === */
.section-bg { background: var(--bg); }
.section-surface { background: var(--surface); }

section {
  padding-block: var(--section-pad);
  border-top: 1px solid var(--border);
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-heading {
  margin-bottom: 0.75rem;
}

.section-sub {
  font-size: 1.0625rem;
  max-width: 52ch;
  color: var(--fg-muted);
}

/* === Hero === */
.hero {
  position: relative;
  display: flex;
  align-items: flex-start;
  padding-top: calc(var(--nav-h) + 4rem);
  padding-bottom: 5rem;
  background: var(--bg);
  border-top: none;
  overflow: hidden;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, color-mix(in srgb, var(--accent) 7%, transparent) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  width: 100%;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-bright);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: 100px;
  padding: 0.375rem 1rem;
}

.eyebrow-dot {
  color: var(--fg-subtle);
}

.hero-headline {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  color: var(--fg);
}

.headline-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 48ch;
  margin-inline: auto;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 40%, transparent);
}

.btn-primary:hover {
  background: var(--accent-bright);
  color: var(--bg);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px color-mix(in srgb, var(--accent) 35%, transparent);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s, transform 0.15s;
}

.btn-ghost:hover {
  color: var(--fg);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.hero-banner-wrap {
  position: relative;
  margin-inline: auto;
  max-width: 640px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  box-shadow:
    0 0 80px -20px color-mix(in srgb, var(--accent) 30%, transparent),
    0 24px 60px -12px rgba(0,0,0,0.5);
  background: var(--surface);
}

.hero-banner {
  display: block;
  width: 100%;
  height: auto;
}

/* === Novel Proposition === */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 2.5rem;
}

.diff-card {
  background: var(--surface);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  transition: background 0.2s;
}

.diff-card:hover {
  background: color-mix(in srgb, var(--accent) 5%, var(--surface));
}

.diff-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.diff-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.diff-desc {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.55;
  max-width: none;
}

.novel-tagline {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-bright);
  letter-spacing: 0.01em;
  text-align: center;
  max-width: none;
  padding: 1.25rem;
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

/* === Comparison Matrix === */
.matrix-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.matrix-scroll {
  overflow-x: auto;
}

.matrix-scroll:focus {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

thead {
  background: var(--surface-raised);
}

th {
  padding: 0.875rem 1.125rem;
  text-align: center;
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--fg-muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

th.col-tool {
  text-align: left;
  min-width: 130px;
}

td {
  padding: 0.875rem 1.125rem;
  border-bottom: 1px solid var(--border);
  text-align: center;
  vertical-align: middle;
}

td.col-tool {
  text-align: left;
}

tbody tr:last-child td { border-bottom: none; }

tbody tr {
  background: var(--bg);
  transition: background 0.15s;
}

tbody tr:hover {
  background: color-mix(in srgb, var(--fg) 2%, var(--bg));
}

.tool-name {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--fg-muted);
  font-weight: 400;
}

/* Tarsa row */
.row-tarsa {
  background: color-mix(in srgb, var(--accent) 6%, var(--surface)) !important;
  border-left: 3px solid var(--accent);
}

.row-tarsa:hover {
  background: color-mix(in srgb, var(--accent) 9%, var(--surface)) !important;
}

.row-tarsa .tool-name {
  font-weight: 700;
  color: var(--accent-bright);
  font-size: 0.9375rem;
}

.winner-badge {
  display: inline-block;
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  border-radius: 4px;
  padding: 0.125rem 0.4rem;
  vertical-align: middle;
}

/* Dot indicators */
.dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
}

.dot svg { width: 18px; height: 18px; }

.dot-yes { color: var(--accent); }
.dot-no { color: var(--fg-subtle); }
.dot-partial { color: #f59e0b; }

/* Matrix legend */
.matrix-legend {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.875rem 1.125rem;
  border-top: 1px solid var(--border);
  background: var(--surface-raised);
  font-size: 0.8125rem;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

/* === Features === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  cursor: default;
}

.feature-card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px -8px color-mix(in srgb, var(--accent) 15%, transparent);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: none;
}

/* === Install === */
.install-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.install-block {
  max-width: 820px;
  margin-inline: auto;
  text-align: center;
}

.install-pre-wrap {
  position: relative;
  margin-bottom: 1.25rem;
}

.install-pre {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 5rem 1.5rem 2rem;
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 1.5vw, 0.875rem);
  line-height: 1.55;
  color: var(--accent-bright);
  text-align: left;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--accent) 12%, transparent),
    0 16px 48px -12px rgba(0,0,0,0.5);
}

.install-pre code {
  color: inherit;
  font-size: inherit;
  font-family: inherit;
}

.install-caption {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--fg-subtle);
  max-width: none;
  letter-spacing: 0.02em;
}

/* === Architecture Flow === */
.arch-flow {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 2rem 1.5rem;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
}

.arch-step {
  flex-shrink: 0;
}

.arch-box {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 0.875rem;
  min-width: 112px;
  text-align: center;
  transition: border-color 0.2s;
}

.arch-box:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}

.arch-box-accent {
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
}

.arch-label-top {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.arch-node-name {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg);
  font-weight: 500;
  white-space: nowrap;
}

.arch-connector {
  flex: 1;
  min-width: 24px;
  max-width: 44px;
  height: 16px;
  flex-shrink: 0;
}

.arch-connector svg {
  width: 100%;
  height: 100%;
}

/* === Code blocks (generic) === */
pre {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--fg);
  position: relative;
  text-align: left;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--accent-bright);
}

pre code {
  color: var(--fg);
  font-size: inherit;
}

.pre-wrap {
  position: relative;
}

/* === Copy button === */
.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: 5px;
  padding: 0.3rem 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent-bright);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  letter-spacing: 0.02em;
}

.copy-btn:hover {
  background: color-mix(in srgb, var(--accent) 18%, var(--surface));
  border-color: var(--accent);
  color: var(--fg);
}

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

/* === Footer === */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding-block: 3.5rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 2rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--fg);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.125rem;
}

.footer-wordmark {
  font-family: var(--font-heading);
}

.footer-logo-link:hover { color: var(--accent-bright); }

.footer-lens { display: block; }

.footer-tagline {
  font-size: 0.8125rem;
  color: var(--fg-subtle);
  max-width: none;
}

.footer-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.625rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--fg-subtle);
  max-width: 36ch;
  line-height: 1.6;
  text-align: right;
  margin-left: auto;
}

/* === Reduced motion === */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sticky-nav { transition: none; }
  .feature-card:hover { transform: none; }
  .btn-primary:hover, .btn-ghost:hover { transform: none; }
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* === Mobile === */
@media (max-width: 900px) {
  .diff-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad: 3.5rem;
  }

  .nav-links li:not(:last-child) { display: none; }

  .hero {
    padding-top: calc(var(--nav-h) + 3rem);
  }

  .hero-headline { font-size: clamp(2.25rem, 9vw, 3.5rem); }

  .hero-cta { flex-direction: column; align-items: center; }

  .diff-grid {
    grid-template-columns: 1fr;
    gap: 1px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .arch-flow {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1.5rem;
  }

  .arch-connector {
    width: 16px;
    height: 32px;
    min-width: unset;
    max-width: unset;
    margin-inline: auto;
  }

  .arch-connector svg {
    transform: rotate(90deg);
  }

  .arch-box { min-width: unset; }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand { align-items: center; }
  .footer-logo-link { justify-content: center; }
  .footer-disclaimer { text-align: center; margin-left: 0; max-width: none; }

  .matrix-legend { flex-wrap: wrap; gap: 0.75rem; }
}

@media (max-width: 480px) {
  .container { padding-inline: 1.25rem; }
  .diff-grid { border-radius: 8px; }
}