/*
  Memory Viewer — liquid glass, ephemeral, fluid
*/

@charset "UTF-8";

:root {
  color-scheme: light dark;

  --base-h: 212;
  --base-s: 15%;
  --base-d: 13%;
  --base-l: 97%;
  --accent-h: 215;
  --accent-s: 75%;
  --accent-d: 70%;
  --accent-l: 60%;

  --blue: #2e80f2;
  --pink: #ff82b2;
  --green: #3eb4bf;
  --yellow: #e5b567;
  --purple: #9e86c8;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Ubuntu, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Menlo, SFMono-Regular, Consolas, monospace;

  --radius-m: 8px;
  --radius-l: 10px;
  --radius-xl: 20px;
  --radius-2xl: 28px;

  --color-base-00: #12161c;
  --color-base-10: #1a1f28;
  --color-base-25: #242a35;
  --color-base-30: #2a3040;
  --color-base-35: #353d4d;

  --color-accent: hsl(var(--accent-h), var(--accent-s), var(--accent-d));

  --text-normal: hsl(var(--base-h), var(--base-s), calc(var(--base-d) + 82%));
  --text-muted: hsl(var(--base-h), var(--base-s), calc(var(--base-d) + 58%));
  --text-faint: hsl(var(--base-h), var(--base-s), calc(var(--base-d) + 28%));

  --shadow-s: 0px 1px 2px rgba(0,0,0,0.15), 0px 4px 8px rgba(0,0,0,0.2), 0px 20px 40px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 80px -15px color-mix(in srgb, var(--blue) 25%, transparent);

  --h3-color: var(--blue);
  --h4-color: var(--yellow);
  --strong-color: var(--pink);
  --em-color: var(--pink);
  --quote-color: var(--green);

  --bg: var(--color-base-00);
  --surface: var(--color-base-10);
  --border: var(--color-base-30);

  --glass-bg: color-mix(in srgb, var(--bg) 35%, transparent);
  --glass-tint: color-mix(in srgb, var(--color-accent) 8%, transparent);
  --glass-border: color-mix(in srgb, var(--border) 50%, transparent);
  --glass-highlight: color-mix(in srgb, #ffffff 8%, transparent);
  --glass-blur: 28px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
}

/* Dark mode values merged into :root — always dark */

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

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  background: var(--bg);
  color: var(--text-normal);
  display: flex;
  min-height: 100vh;
  overflow: hidden;
}

/* Deep nebula background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 1400px 900px at 15% -15%, color-mix(in srgb, var(--blue) 22%, transparent), transparent 65%),
    radial-gradient(ellipse 1000px 700px at 110% 5%, color-mix(in srgb, var(--pink) 16%, transparent), transparent 60%),
    radial-gradient(ellipse 900px 600px at 45% 130%, color-mix(in srgb, var(--green) 14%, transparent), transparent 60%),
    radial-gradient(ellipse 600px 400px at 80% 70%, color-mix(in srgb, var(--purple) 10%, transparent), transparent 55%),
    radial-gradient(2px 2px at 18% 28%, color-mix(in srgb, var(--text-faint) 60%, transparent), transparent 60%),
    radial-gradient(1.5px 1.5px at 72% 52%, color-mix(in srgb, var(--text-faint) 50%, transparent), transparent 60%),
    radial-gradient(1px 1px at 42% 78%, color-mix(in srgb, var(--text-faint) 40%, transparent), transparent 60%),
    radial-gradient(1.5px 1.5px at 88% 82%, color-mix(in srgb, var(--text-faint) 45%, transparent), transparent 60%),
    radial-gradient(1px 1px at 8% 88%, color-mix(in srgb, var(--text-faint) 35%, transparent), transparent 60%),
    radial-gradient(1px 1px at 55% 15%, color-mix(in srgb, var(--text-faint) 45%, transparent), transparent 60%),
    radial-gradient(1.5px 1.5px at 35% 60%, color-mix(in srgb, var(--text-faint) 35%, transparent), transparent 60%);
  animation: drift 120s ease-in-out infinite alternate;
}

@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-15px, 10px) scale(1.02); }
  100% { transform: translate(10px, -8px) scale(1); }
}

/* Glass — deeply translucent */
.glass {
  position: relative;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--glass-highlight) 60%, transparent), transparent 50%),
    linear-gradient(135deg, var(--glass-tint), transparent 60%),
    var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-s), var(--shadow-glow);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.3);
  transition: box-shadow 0.4s ease, border-color 0.3s ease;
}

.glass::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: inset 0 1px 0 color-mix(in srgb, #ffffff 14%, transparent),
              inset 0 -1px 0 color-mix(in srgb, #000000 5%, transparent);
  opacity: 0.7;
}

.glass:hover {
  border-color: color-mix(in srgb, var(--glass-border) 80%, var(--color-accent));
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ── Sidebar ── */
.sidebar {
  width: 300px;
  min-width: 300px;
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  padding: var(--space-6) var(--space-4);
  gap: var(--space-4);
  z-index: 10;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-2);
}

.sidebar-header .logo {
  font-size: 26px;
  filter: drop-shadow(0 0 8px color-mix(in srgb, var(--blue) 40%, transparent));
}

.sidebar-header h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-normal);
  line-height: 1.2;
}

.sidebar-header .subtitle {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 1px;
}

.sidebar-inner {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.file-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.file-group-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  padding: var(--space-1) var(--space-2);
  margin-bottom: var(--space-1);
}

.file-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-l);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.file-item:hover {
  background: color-mix(in srgb, var(--color-accent) 6%, transparent);
  border-color: color-mix(in srgb, var(--color-accent) 12%, transparent);
}

.file-item.active {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  border-color: color-mix(in srgb, var(--color-accent) 25%, transparent);
  box-shadow: 0 0 20px -8px color-mix(in srgb, var(--color-accent) 20%, transparent);
}

.file-item .name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-normal);
  transition: color 0.2s ease;
}

.file-item.active .name {
  color: var(--color-accent);
}

.file-item .meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
}

/* ── Main ── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: var(--space-6) var(--space-6) var(--space-6) var(--space-2);
  gap: var(--space-4);
  height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  flex-shrink: 0;
}

.topbar .file-path {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  letter-spacing: 0.03em;
}

.topbar .file-size {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
}

.content-wrapper {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.content {
  max-width: 46rem;
  padding: var(--space-6);
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 50vh;
  color: var(--text-faint);
  text-align: center;
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.4;
  filter: drop-shadow(0 0 12px color-mix(in srgb, var(--blue) 30%, transparent));
}

.empty-state h2 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: var(--space-2);
  border: none;
  padding: 0;
  color: var(--text-muted);
}

.empty-state p {
  font-size: 0.85rem;
  color: var(--text-faint);
}

/* ── Markdown ── */
.markdown-body {
  line-height: 1.75;
  font-size: 0.92rem;
}

.markdown-body h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--glass-border);
  color: var(--text-normal);
}

.markdown-body h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: var(--space-8) 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--glass-border);
  color: var(--text-normal);
}

.markdown-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: var(--space-6) 0 var(--space-2);
  color: var(--h3-color);
}

.markdown-body h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: var(--space-4) 0 var(--space-2);
  color: var(--h4-color);
}

.markdown-body p { margin: 0 0 var(--space-4); }

.markdown-body ul, .markdown-body ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.25rem;
}

.markdown-body li { margin: var(--space-1) 0; }

.markdown-body strong { color: var(--strong-color); font-weight: 600; }
.markdown-body em { color: var(--em-color); font-style: italic; }

.markdown-body code {
  font-family: var(--font-mono);
  background: color-mix(in srgb, var(--color-accent) 8%, transparent);
  padding: 0.12em 0.3em;
  border-radius: 4px;
  font-size: 0.85rem;
  border: 1px solid color-mix(in srgb, var(--color-accent) 10%, transparent);
}

.markdown-body pre {
  margin: var(--space-6) 0;
  padding: var(--space-4);
  background: color-mix(in srgb, var(--surface) 50%, transparent);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow-x: auto;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.markdown-body pre code {
  background: none;
  padding: 0;
  font-size: 0.82rem;
  border: none;
}

.markdown-body blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-3) var(--space-4);
  border-left: 2px solid color-mix(in srgb, var(--green) 60%, transparent);
  background: color-mix(in srgb, var(--green) 5%, transparent);
  border-radius: 0 var(--radius-l) var(--radius-l) 0;
  color: var(--quote-color);
  font-style: italic;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--glass-border);
  margin: var(--space-8) 0;
}

.markdown-body a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
  transition: border-color 0.2s ease;
}

.markdown-body a:hover {
  border-color: var(--color-accent);
}

.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 var(--space-4);
}

.markdown-body th, .markdown-body td {
  border: 1px solid var(--glass-border);
  padding: var(--space-2) var(--space-3);
  text-align: left;
}

.markdown-body th {
  background: color-mix(in srgb, var(--surface) 40%, transparent);
  font-weight: 600;
}

/* Scrollbar — whisper thin */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--text-faint) 40%, transparent);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--text-faint) 60%, transparent);
}

/* Responsive */
@media (max-width: 768px) {
  body { flex-direction: column; overflow: auto; }
  .sidebar {
    width: 100%;
    min-width: 100%;
    height: auto;
    position: relative;
    max-height: 35vh;
    padding: var(--space-4);
  }
  .main {
    height: auto;
    padding: var(--space-4);
  }
}

@media (prefers-reduced-transparency: reduce) {
  .glass { backdrop-filter: none; -webkit-backdrop-filter: none; }
}

@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
}