/* ============================
   Image Intelligence — Modern UI
   Mobile-first · Accessible · 2025 vibe
   No external fonts/CDNs (fast + private)
   ============================ */

:root {
  /* Color system (auto-synced with dark mode below) */
  --bg: #0b0c10;             /* dark background used only in dark mode; overridden in light */
  --surface: #111318;
  --panel: #151923;
  --ink: #e8eaed;
  --muted: #a1a7b3;
  --primary: #4f8cff;        /* electric blue */
  --primary-ink: #0b0c10;
  --border: rgba(255,255,255,.12);
  --ring: #8ab4ff;
  --ok: #16a34a;
  --warn: #f59e0b;
  --error: #ef4444;

  /* Radii & shadow */
  --radius: 14px;
  --shadow-1: 0 1px 2px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.18);
  --shadow-2: 0 6px 18px rgba(0,0,0,.22);

  /* Type scale (fluid between 320–1440px) */
  --step--1: clamp(.88rem, .84rem + .2vw, .96rem);
  --step-0:  clamp(1.0rem, .95rem + .35vw, 1.10rem);
  --step-1:  clamp(1.15rem, 1.05rem + .6vw, 1.35rem);
  --step-2:  clamp(1.35rem, 1.2rem + .9vw,  1.7rem);
  --step-3:  clamp(1.6rem,  1.4rem + 1.2vw, 2.0rem);

  /* Spacing (fluid) */
  --space-1: clamp(6px, 1vw, 8px);
  --space-2: clamp(10px, 1.2vw, 12px);
  --space-3: clamp(14px, 1.6vw, 16px);
  --space-4: clamp(18px, 2vw, 22px);
  --space-5: clamp(24px, 3vw, 28px);
}

/* Light mode defaults */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fb;
    --surface: #ffffff;
    --panel: #ffffff;
    --ink: #111827;
    --muted: #6b7280;
    --border: rgba(17,24,39,.12);
    --primary-ink: #ffffff;
  }
}

/* Base */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  padding: var(--space-4);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  color: var(--ink);
  background: radial-gradient(1200px 600px at 10% -10%, rgba(79,140,255,.10), transparent 60%),
              radial-gradient(1200px 600px at 110% 20%, rgba(94,234,212,.10), transparent 60%),
              var(--bg);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout containers */
.site-header, .status, .card, .tabs, .panel, .site-footer {
  max-width: min(1100px, 94vw);
  margin-inline: auto;
}

.site-header { margin-bottom: var(--space-3); }
.site-header h1 {
  font-size: var(--step-3);
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-1);
}
.muted { color: var(--muted); }

/* Status banners */
.status {
  margin-bottom: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel), transparent 12%);
  box-shadow: var(--shadow-1);
}
.status.ok    { border-color: color-mix(in oklab, var(--ok), #000 30%);    background: color-mix(in oklab, var(--ok), transparent 88%); }
.status.warn  { border-color: color-mix(in oklab, var(--warn), #000 35%);  background: color-mix(in oklab, var(--warn), transparent 90%); }
.status.error { border-color: color-mix(in oklab, var(--error), #000 35%); background: color-mix(in oklab, var(--error), transparent 90%); }

/* Cards (forms/panels) */
.card, .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: var(--space-3);
}

.card { backdrop-filter: saturate(120%) blur(4px); }

/* Form */
.field-group { margin-bottom: var(--space-3); }
.label { display:block; font-weight:600; margin-bottom: .4rem; font-size: var(--step-0); }
.input, .textarea {
  width: 100%;
  padding: .75rem .9rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: color-mix(in oklab, var(--panel), #fff 6%);
  color: var(--ink);
  font: inherit;
  outline: none;
  transition: box-shadow .2s ease, border-color .2s ease, background .2s ease;
}
.input:focus, .textarea:focus {
  border-color: color-mix(in oklab, var(--ring), #000 20%);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ring), transparent 70%);
}
.textarea { min-height: 120px; resize: vertical; }
.help { font-size: var(--step--1); color: var(--muted); margin-top: .35rem; }
.or { text-align:center; color: var(--muted); margin: var(--space-2) 0; }

/* Buttons */
.actions { display:flex; gap: var(--space-2); flex-wrap: wrap; }
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel), #fff 4%);
  color: var(--ink);
  padding: .7rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: transform .06s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(180deg, color-mix(in oklab, var(--primary), #fff 18%), var(--primary));
  color: var(--primary-ink);
  border-color: color-mix(in oklab, var(--primary), #000 30%);
}

/* Preview image */
.preview { margin-top: var(--space-2); }
.preview img {
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-1);
}

/* Tabs */
.tabs {
  margin-top: var(--space-3);
  display: flex; gap: 8px; flex-wrap: wrap;
}
.tab {
  padding: .55rem .9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel), #fff 5%);
  color: var(--ink);
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.tab:hover { border-color: color-mix(in oklab, var(--primary), #000 30%); }
.tab.active {
  background: var(--ink);
  color: color-mix(in oklab, var(--panel), #000 12%);
  border-color: transparent;
}

/* Panels */
.panel { margin-top: var(--space-2); }
.meta-list div { margin: .25rem 0; font-size: var(--step-0); }

.swatches { display: flex; flex-wrap: wrap; gap: 8px; }
.swatch {
  width: 40px; height: 40px; border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-1);
}

.kv { margin: .35rem 0; font-size: var(--step-0); align-items: center; display: flex; gap: 8px; flex-wrap: wrap; }
.copy {
  margin-left: 6px;
  font-size: var(--step--1);
  color: var(--primary);
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: .2rem .4rem;
  border-radius: 6px;
}
.copy:hover { text-decoration: underline; }

.codeblock {
  white-space: pre-wrap;
  word-break: break-word;
  background: #0b1220;
  color: #e5e7eb;
  border-radius: 12px;
  padding: var(--space-2);
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .92rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-1);
}

/* Footer */
.site-footer { text-align: center; margin-top: var(--space-3); color: var(--muted); }

/* Focus outlines for a11y */
:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ring), transparent 50%) !important;
  border-color: color-mix(in oklab, var(--ring), #000 20%) !important;
}

/* Scrollbar (WebKit) */
*::-webkit-scrollbar { height: 10px; width: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: color-mix(in oklab, var(--ink), transparent 85%);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}

/* Motion-reduction */
@media (prefers-reduced-motion: reduce) {
  .btn, .tab { transition: none; }
}

/* Larger screens: tidy form grid if desired */
@media (min-width: 860px) {
  .card .field-group.inline {
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    gap: var(--space-2);
    align-items: end;
  }
}