/* =========================================================
   base.css — design tokens, reset, typography, background.
   "Terminal" geek skin: mono-forward, grid + scanline ground,
   neon accent driven by --hue/--sat (settings slider still works).
========================================================= */

:root {
  color-scheme: light;
  --hue: 152;
  --sat: 58%;

  /* Surface layers — crisp light "IDE" */
  --bg-0: #e7ecf1;   /* page */
  --bg-1: #f3f6f9;   /* panels */
  --bg-2: #ffffff;   /* cards / inputs */
  --bg-3: #dde4ec;   /* raised / sunken */

  /* Accent (driven by --hue) — terminal green by default */
  --accent:        hsl(var(--hue), calc(var(--sat) + 6%), 34%);
  --accent-fg:     #ffffff;
  --accent-soft:   hsl(var(--hue), calc(var(--sat) * 0.6), 91%);
  --accent-glow:   hsl(var(--hue), var(--sat), 46%, 0.22);

  /* Text */
  --text-1: #0f1923;
  --text-2: #3a4756;
  --text-3: #67768a;
  --text-muted: #93a0b2;

  /* Lines & shadows */
  --border:        rgba(23, 49, 79, 0.14);
  --border-hover:  rgba(23, 49, 79, 0.30);
  --border-accent: hsl(var(--hue), var(--sat), 40%, 0.45);
  --grid-line:     rgba(23, 49, 79, 0.045);
  --scanline:      rgba(23, 49, 79, 0.018);
  --shadow-sm: 0 1px 0 rgba(20, 40, 70, 0.05);
  --shadow:    0 2px 0 rgba(20, 40, 70, 0.05), 0 10px 30px rgba(20, 40, 70, 0.06);
  --shadow-lg: 0 2px 0 rgba(20, 40, 70, 0.05), 0 24px 60px rgba(20, 40, 70, 0.14);

  /* Signal colours — now / next / past + domain badges (kept as token
     names for backward compat with downstream files). */
  --giverny-pond:  #2f9fe0;   /* cyan  → NEXT / event   */
  --giverny-leaf:  #2faa6a;   /* green → ok / lesson    */
  --giverny-wisteria: #8b7bf0;/* violet→ PAST / message */
  --giverny-sun:   #d9952a;   /* amber → NOW / task     */
  --giverny-rose:  #d8556a;   /* red   → form / alert   */
  --giverny-paper: var(--bg-2);

  --sig-now:  var(--giverny-sun);
  --sig-next: var(--giverny-pond);
  --sig-past: var(--giverny-wisteria);

  /* Radii — sharp, technical */
  --r-xs: 2px;
  --r-sm: 4px;
  --r:    6px;
  --r-lg: 9px;
  --r-xl: 12px;
  --r-pill: 5px;

  /* Type */
  --font:        'Inter', 'PingFang SC', 'Noto Sans SC', system-ui, sans-serif;
  --font-serif:  'Space Grotesk', 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif; /* display */
  --font-mono:   'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, 'Cascadia Code', monospace;

  /* Spacing */
  --pad-page: clamp(16px, 3vw, 28px);
  --gap: clamp(12px, 1.6vw, 18px);

  /* Motion */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast:   110ms;
  --dur:        200ms;
  --dur-slow:   340ms;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg-0: #080b11;   /* page — near black */
  --bg-1: #0d131c;   /* panels */
  --bg-2: #111927;   /* cards */
  --bg-3: #1a2434;   /* raised */

  --accent:      hsl(var(--hue), calc(var(--sat) + 18%), 58%);
  --accent-fg:   #04130d;
  --accent-soft: hsl(var(--hue), calc(var(--sat) * 0.5), 16%);
  --accent-glow: hsl(var(--hue), var(--sat), 60%, 0.26);

  --text-1: #d8e3f0;
  --text-2: #93a3b8;
  --text-3: #5e6c80;
  --text-muted: #44505f;

  --border:       rgba(122, 162, 204, 0.16);
  --border-hover: rgba(122, 162, 204, 0.32);
  --border-accent: hsl(var(--hue), var(--sat), 56%, 0.5);
  --grid-line:    rgba(122, 162, 204, 0.05);
  --scanline:     rgba(0, 0, 0, 0.16);
  --shadow-sm: 0 1px 0 rgba(0,0,0,0.4);
  --shadow:    0 0 0 1px rgba(0,0,0,0.2), 0 12px 34px rgba(0,0,0,0.45);
  --shadow-lg: 0 0 0 1px rgba(0,0,0,0.2), 0 28px 70px rgba(0,0,0,0.6);

  --giverny-pond:  #45b7f5;
  --giverny-leaf:  #34d399;
  --giverny-wisteria: #a892ff;
  --giverny-sun:   #f0b429;
  --giverny-rose:  #ff6b81;
}

*, *::before, *::after { box-sizing: border-box; }
html { overflow-x: hidden; }
html, body { margin: 0; min-height: 100vh; min-height: 100dvh; }

body {
  position: relative;
  overflow-x: hidden;
  color: var(--text-1);
  background-color: var(--bg-0);
  /* Technical dot+line grid instead of watercolour washes. */
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 30px 30px, 30px 30px;
  background-position: -1px -1px, -1px -1px;
  background-attachment: fixed;
  font: 400 14.5px/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'ss01' on, 'cv05' on;
}

/* Accent glow wash — a soft signal from the top-left, no imagery. */
body::after {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(ellipse 900px 520px at 8% -6%, var(--accent-glow), transparent 60%),
    radial-gradient(ellipse 760px 480px at 100% 8%, hsl(calc(var(--hue) + 42), var(--sat), 50%, 0.10), transparent 62%);
}

/* Faint CRT scanlines — texture, not noise. */
body::before {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  background-image: repeating-linear-gradient(
    0deg,
    var(--scanline) 0px,
    var(--scanline) 1px,
    transparent 1px,
    transparent 3px
  );
  opacity: 0.55;
  mix-blend-mode: normal;
}
html[data-theme="dark"] body::before { opacity: 0.7; }

a { color: var(--accent); text-decoration: none; transition: color var(--dur-fast); }
a:hover { color: color-mix(in srgb, var(--accent) 70%, var(--text-1)); }

button, input, textarea, select { font: inherit; color: inherit; }
button { border: 0; cursor: pointer; background: none; padding: 0; }
input, textarea, select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-2);
  color: var(--text-1);
  font-family: var(--font-mono);
  font-size: 13px;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  letter-spacing: -0.012em;
  font-feature-settings: 'ss01' on, 'kern' on;
  margin: 0;
  color: var(--text-1);
}
h1 { font-size: clamp(26px, 3vw, 34px); font-weight: 600; }
h2 { font-size: clamp(20px, 2.2vw, 26px); font-weight: 600; }
h3 { font-size: 17px; font-weight: 600; letter-spacing: -0.005em; }
h4 { font-size: 15px; font-weight: 600; }

.muted { color: var(--text-3); }
.empty {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 13px;
  margin: 12px 0;
}
.empty::before { content: '// '; color: var(--text-muted); }
.loading {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 13px;
}
.loading::before { content: '> '; color: var(--accent); }

/* Blinking caret used by loading states / terminal accents. */
@keyframes geekBlink { 0%, 49% { opacity: 1 } 50%, 100% { opacity: 0 } }
.loading::after {
  content: '_';
  color: var(--accent);
  animation: geekBlink 1s steps(1) infinite;
}
@media (prefers-reduced-motion: reduce) {
  .loading::after { animation: none; }
}

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

/* =========================================================
   v22 observatory skin — Pulse-style functional data cockpit.
========================================================= */

:root,
html[data-theme="dark"] {
  color-scheme: dark;
  /* 用户自定义配色：--hue/--sat 由设置页写入（默认观测舱青）。
     全部 accent 派生色都从这两个变量算出，滑杆即时生效。 */
  --hue: 187;
  --sat: 89%;
  --bg-0: #030712;
  --bg-1: rgba(8, 16, 30, 0.72);
  --bg-2: rgba(11, 22, 39, 0.82);
  --bg-3: rgba(18, 32, 54, 0.9);
  --accent: hsl(var(--hue), var(--sat), 69%);
  --accent-fg: hsl(var(--hue), calc(var(--sat) * 0.6), 6%);
  --accent-soft: hsl(var(--hue), var(--sat), 69%, 0.1);
  --accent-glow: hsl(var(--hue), var(--sat), 69%, 0.26);
  --text-1: #f4f9ff;
  --text-2: #cad8e8;
  --text-3: #9fb1c6;
  --text-muted: #7e91a8;
  --border: rgba(148, 163, 184, 0.2);
  --border-hover: rgba(148, 163, 184, 0.34);
  --border-accent: hsl(var(--hue), var(--sat), 69%, 0.46);
  --grid-line: hsl(var(--hue), var(--sat), 69%, 0.045);
  --scanline: rgba(255, 255, 255, 0.025);
  --shadow-sm: 0 1px 0 rgba(255, 255, 255, 0.04);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
  --shadow-lg: 0 34px 95px rgba(0, 0, 0, 0.55);
  --giverny-pond: #67e8f9;
  --giverny-leaf: #34d399;
  --giverny-wisteria: #a78bfa;
  --giverny-sun: #fbbf24;
  --giverny-rose: #ff6b81;
  --r-xs: 2px;
  --r-sm: 6px;
  --r: 8px;
  --r-lg: 10px;
  --r-xl: 14px;
  --r-pill: 999px;
}

html[data-theme="light"] {
  --bg-0: #e7eef6;
  --bg-1: rgba(245, 249, 253, 0.82);
  --bg-2: rgba(255, 255, 255, 0.9);
  --bg-3: #dbe7f2;
  --accent: hsl(var(--hue), min(var(--sat), 68%), 38%);
  --accent-fg: #ffffff;
  --accent-soft: hsl(var(--hue), min(var(--sat), 62%), 91%);
  --accent-glow: hsl(var(--hue), min(var(--sat), 72%), 45%, 0.18);
  --text-1: #0c1724;
  --text-2: #31445a;
  --text-3: #63758a;
  --text-muted: #8ca0b6;
  --border: rgba(23, 49, 79, 0.16);
  --border-accent: hsl(var(--hue), 62%, 42%, 0.36);
}

html[data-design="observatory"] body {
  background:
    radial-gradient(1100px 560px at 45% -10%, rgba(96, 165, 250, 0.22), transparent 68%),
    radial-gradient(820px 460px at 90% 16%, rgba(167, 139, 250, 0.16), transparent 65%),
    radial-gradient(760px 440px at 8% 10%, rgba(45, 212, 191, 0.14), transparent 66%),
    linear-gradient(180deg, var(--bg-0) 0%, #050b15 48%, #02040a 100%);
  background-attachment: fixed;
}

html[data-design="observatory"] body::after {
  z-index: 0;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    radial-gradient(circle at 50% 8%, transparent 0 36%, rgba(3, 7, 18, 0.35) 76%, rgba(3, 7, 18, 0.72));
  background-size: 30px 30px, 30px 30px, auto;
  opacity: 1;
  mix-blend-mode: normal;
}

html[data-design="observatory"] body::before {
  z-index: 2;
  background-image: repeating-linear-gradient(
    0deg,
    var(--scanline) 0,
    var(--scanline) 1px,
    transparent 1px,
    transparent 4px
  );
  opacity: 0.5;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}