:root {
  --ink: #141414;
  --ink-soft: #3d3d3d;
  --paper: #f4f1ec;
  --paper-deep: #e8e4dc;
  --accent: #5c5c5c;
  --hero-fade: linear-gradient(
    180deg,
    rgba(10, 10, 10, 0.15) 0%,
    rgba(10, 10, 10, 0.55) 55%,
    rgba(10, 10, 10, 0.92) 100%
  );
  --radius: 14px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.12);
  --font-serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-sans: "DM Sans", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.88em;
  background: var(--paper-deep);
  padding: 0.12em 0.35em;
  border-radius: 6px;
}

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

.narrow {
  max-width: 720px;
}

.site-header {
  background: #0a0a0a;
  color: #f8f6f2;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem min(4vw, 2rem);
  position: absolute;
  z-index: 2;
  width: 100%;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.92rem;
}

.nav-links a {
  text-decoration: none;
  opacity: 0.88;
}

.nav-links a:hover {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.hero {
  position: relative;
  min-height: clamp(420px, 72vh, 820px);
  display: grid;
}

.hero-image {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  object-position: center 35%;
  filter: grayscale(1) contrast(1.05);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(2rem, 6vw, 4.5rem) min(4vw, 2rem) clamp(2.5rem, 7vw, 5rem);
  background: var(--hero-fade);
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.85;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 600;
  line-height: 1.1;
  max-width: 14ch;
}

.hero-lead {
  margin: 0 0 1.5rem;
  max-width: 52ch;
  font-size: 1.05rem;
  opacity: 0.92;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: #f8f6f2;
  color: #111;
}

.btn-ghost {
  border-color: rgba(248, 246, 242, 0.45);
  color: #f8f6f2;
}

.section {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
}

.section h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3.5vw, 2.6rem);
  font-weight: 600;
  margin: 0 0 1.25rem;
  line-height: 1.15;
}

.section-lead {
  margin: -0.5rem 0 2rem;
  color: var(--ink-soft);
  max-width: 60ch;
}

.intro p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

.pipeline {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.pipeline li {
  background: #fff;
  border: 1px solid var(--paper-deep);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem 1.5rem;
  box-shadow: var(--shadow);
}

.step-num {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.pipeline h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}

.pipeline p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.feature-grid,
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.card,
.showcase-card {
  background: #fff;
  border: 1px solid var(--paper-deep);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card h3,
.showcase-card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
}

.card p,
.showcase-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.showcase-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.65rem;
}

.showcase-card pre {
  margin: 1.1rem 0 0;
  padding: 1rem;
  background: #1a1a1a;
  color: #e8e6e1;
  border-radius: 10px;
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.5;
}

.showcase-card pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.quickstart .split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  align-items: start;
}

.install,
.code-block {
  margin: 0;
  padding: 1.25rem;
  background: #1a1a1a;
  color: #ebe9e4;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.55;
  box-shadow: var(--shadow);
}

.footer {
  border-top: 1px solid var(--paper-deep);
  padding: 2rem 0 2.5rem;
  background: #fff;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

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

.page-hero {
  position: relative;
  min-height: clamp(280px, 42vh, 480px);
  display: grid;
}

.page-hero-image {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  object-position: center 40%;
  filter: grayscale(1) contrast(1.05);
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(2rem, 5vw, 3.5rem) min(4vw, 2rem);
  background: var(--hero-fade);
  color: #f8f6f2;
}

.page-hero-overlay h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
}

.cta-box {
  text-align: center;
  padding: 2rem 1.5rem;
  background: #fff;
  border: 1px solid var(--paper-deep);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.cta-box h2 {
  margin-top: 0;
}

.cta-box p {
  margin: 0 0 1.25rem;
  color: var(--ink-soft);
}

.hero-actions--dark .btn-primary {
  background: var(--ink);
  color: #fff;
}

.hero-actions--dark .btn-ghost {
  border-color: var(--ink-soft);
  color: var(--ink);
}

.code-block--wide {
  max-width: 100%;
}

.showcase-deep h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 0.5rem;
}

.footer-inner a + a {
  margin-left: 1rem;
}

@media (max-width: 640px) {
  .nav {
    position: relative;
    background: #0a0a0a;
  }

  .hero {
    min-height: auto;
  }

  .hero-overlay {
    position: relative;
    background: #111;
    padding-top: 1rem;
  }

  .hero-image {
    max-height: 280px;
    min-height: 0;
  }
}

/* ============================================
   Interactive Playground — GitHub Showcase
   ============================================ */

.playground {
  display: grid;
  gap: 1.5rem;
}

.playground-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.pg-panel {
  background: #fff;
  border: 1px solid var(--paper-deep);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 1.15rem;
  box-shadow: var(--shadow);
}

.pg-panel h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
}

.pg-panel h4 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  text-transform: uppercase;
  font-weight: 600;
}

.pg-panel label {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.pg-input,
.pg-textarea,
.pg-select {
  width: 100%;
  border: 1px solid var(--paper-deep);
  background: #fff;
  color: var(--ink);
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  font-size: 0.95rem;
  font-family: inherit;
  margin-bottom: 0.5rem;
}

.pg-textarea {
  min-height: 68px;
  resize: vertical;
  font-family: ui-monospace, SF Mono, Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.35;
}

.scope-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.5rem;
}

.pg-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

.pg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  border: 1px solid var(--paper-deep);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.1s ease, background 0.1s ease, color 0.1s ease;
}

.pg-btn:hover {
  transform: translateY(-1px);
  background: var(--paper);
}

.pg-btn.primary {
  background: var(--ink);
  color: #f8f6f2;
  border-color: var(--ink);
}

.pg-btn.primary:hover {
  background: #222;
}

.pg-btn.danger {
  border-color: #c66;
  color: #922;
}

.pg-btn.small {
  padding: 0.25rem 0.6rem;
  font-size: 0.78rem;
}

.memories-list {
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--paper-deep);
  border-radius: 10px;
  background: #faf9f6;
  padding: 0.25rem;
}

.memory-item {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  margin-bottom: 0.25rem;
  background: #fff;
  border: 1px solid var(--paper-deep);
}

.memory-item:last-child {
  margin-bottom: 0;
}

.memory-item .mem-text {
  flex: 1;
  font-size: 0.9rem;
  line-height: 1.35;
  color: var(--ink);
}

.memory-item .mem-meta {
  font-size: 0.72rem;
  color: var(--ink-soft);
  white-space: nowrap;
  margin-top: 0.15rem;
}

.memory-item .mem-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-top: 0.2rem;
}

.mem-tag {
  font-size: 0.65rem;
  background: var(--paper-deep);
  padding: 1px 6px;
  border-radius: 999px;
  color: var(--ink-soft);
}

.memory-item .del-btn {
  background: transparent;
  border: none;
  color: #944;
  font-size: 1rem;
  line-height: 1;
  padding: 0 4px;
  cursor: pointer;
  opacity: 0.7;
}

.memory-item .del-btn:hover {
  opacity: 1;
}

.search-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

.search-row input[type="text"] {
  flex: 1 1 240px;
}

.search-row input[type="number"] {
  width: 68px;
}

.search-row .pg-btn {
  white-space: nowrap;
}

.results-list {
  max-height: 240px;
  overflow: auto;
  border: 1px solid var(--paper-deep);
  border-radius: 10px;
  background: #fff;
}

.result-item {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--paper-deep);
  font-size: 0.9rem;
}

.result-item:last-child {
  border-bottom: none;
}

.result-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.2rem;
}

.result-score {
  font-family: ui-monospace, monospace;
  font-size: 0.82rem;
  background: var(--paper-deep);
  padding: 1px 7px;
  border-radius: 999px;
  color: var(--ink);
  white-space: nowrap;
}

.result-mem {
  color: var(--ink);
  line-height: 1.3;
}

.score-break {
  font-size: 0.72rem;
  color: var(--ink-soft);
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

.score-break span {
  font-family: ui-monospace, monospace;
}

.chat-log {
  height: 220px;
  overflow-y: auto;
  background: #1a1a1a;
  color: #e8e6e1;
  border-radius: 12px;
  padding: 0.85rem;
  font-size: 0.9rem;
  line-height: 1.45;
  margin-bottom: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.chat-msg {
  max-width: 82%;
  padding: 0.45rem 0.7rem;
  border-radius: 12px;
}

.chat-msg.user {
  align-self: flex-end;
  background: #2f2f2f;
  border-bottom-right-radius: 4px;
}

.chat-msg.assistant {
  align-self: flex-start;
  background: #333;
  border-bottom-left-radius: 4px;
}

.chat-msg .meta {
  font-size: 0.68rem;
  opacity: 0.6;
  margin-bottom: 0.15rem;
  display: block;
}

.chat-retrieved {
  margin: 0.3rem 0 0.15rem;
  padding: 0.35rem 0.5rem;
  background: rgba(255,255,255,0.06);
  border-radius: 8px;
  font-size: 0.78rem;
}

.chat-retrieved ul {
  margin: 0.15rem 0 0;
  padding-left: 1.1rem;
}

.chat-input-row {
  display: flex;
  gap: 0.5rem;
}

.chat-input-row input {
  flex: 1;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--paper-deep);
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  font-size: 0.95rem;
}

.note {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.74rem;
  color: var(--ink-soft);
  opacity: 0.85;
}

.empty-state {
  font-size: 0.85rem;
  color: var(--ink-soft);
  padding: 0.6rem 0.4rem;
  text-align: center;
}

@media (max-width: 720px) {
  .playground-grid {
    grid-template-columns: 1fr;
  }
  .chat-log {
    height: 180px;
  }
}