:root{
  --bg0:#ffffff;
  --bg1:#f8f9fa;
  --surface:#ffffff;
  --surface-2:#f1f3f4;
  --text:#202124;
  --muted:#5f6368;
  --line:#dadce0;
  --brand:#1a73e8;
  --brand-hover:#1765cc;
  --danger:#d93025;
  --ok:#188038;
  --shadow-1: 0 1px 2px 0 rgba(60,64,67,0.3), 0 1px 3px 1px rgba(60,64,67,0.15);
  --shadow-2: 0 4px 6px rgba(60,64,67,0.3);
  --radius: 8px;
  --radius-lg: 16px;
  --mono: "Roboto Mono", monospace;
  --font: "Google Sans", Roboto, Arial, sans-serif;
}

[data-theme="dark"]{
  --bg0:#202124;
  --bg1:#292a2d;
  --surface:#292a2d;
  --surface-2:#3c4043;
  --text:#e8eaed;
  --muted:#9aa0a6;
  --line:#3c4043;
  --brand:#8ab4f8;
  --brand-hover:#a6c8ff;
  --danger:#f28b82;
  --ok:#81c995;
  --shadow-1: 0 1px 2px 0 rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15);
  --shadow-2: 0 4px 8px rgba(0,0,0,0.5);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  color:var(--text);
  background: var(--bg0);
  font-family: var(--font);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

a{ color:var(--brand); text-decoration:none; }
a:hover{ text-decoration:underline; }

.container{ max-width:1280px; margin:0 auto; padding: 24px; }
.topbar{
  display:flex; align-items:center; justify-content:space-between; gap:24px;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 100;
}

.brand{ display:flex; align-items:center; gap:12px; font-size: 22px; color: var(--muted); }
.logo{
  width: 40px; height: 40px; 
  display: flex; align-items: center; justify-content: center;
}
.logo svg { fill: var(--brand); width: 32px; height: 32px; }

.title h1{ margin:0; font-size:22px; font-weight: 400; color: var(--muted); }
.title span { color: var(--text); }

.actions{ display:flex; align-items:center; gap:12px; }

.btn{
  appearance:none;
  border:1px solid var(--line);
  background: var(--surface);
  color:var(--brand);
  padding: 0 24px;
  height: 36px;
  border-radius: 4px;
  cursor:pointer;
  font-weight:500;
  font-family: "Google Sans", Roboto, sans-serif;
  font-size: 14px;
  transition: background .2s, box-shadow .2s;
  display: inline-flex; align-items: center; justify-content: center;
}
.btn:hover{ background: var(--surface-2); color: var(--brand-hover); }
.btn:active{ background: var(--line); }

.btn.primary{
  border:none;
  background: var(--brand);
  color: #fff;
  box-shadow: 0 1px 2px 0 rgba(66,133,244,0.3), 0 1px 3px 1px rgba(66,133,244,0.15);
}
[data-theme="dark"] .btn.primary { color: #202124; }
.btn.primary:hover{ background: var(--brand-hover); box-shadow: 0 2px 4px 0 rgba(66,133,244,0.3), 0 4px 5px 0 rgba(66,133,244,0.15); }
.btn.primary:disabled{ opacity:.6; cursor:not-allowed; box-shadow:none; }

.btn.icon-only { padding: 0; width: 36px; border-radius: 50%; border: none; }
.btn.icon-only svg { width: 20px; height: 20px; fill: var(--muted); }
.btn.icon-only:hover { background: rgba(95,99,104, 0.1); }

/* Card / Upload Area */
.card{
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 0;
  overflow: hidden;
}

.drop{
  padding: 48px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  margin: 24px;
  transition: all 0.2s;
  background: var(--bg1);
  color: var(--muted);
}
.drop:hover { background: var(--surface-2); border-color: var(--brand); color: var(--brand); }
.drop.dragover{ background: #e8f0fe; border-color: var(--brand); color: var(--brand); }
[data-theme="dark"] .drop.dragover { background: #3c4043; }

.dropIcon { margin-bottom: 16px; }
.dropIcon svg { width: 64px; height: 64px; fill: currentColor; }
.dropTitle { font-size: 18px; font-weight: 400; color: var(--text); margin-bottom: 8px; }

.formGrid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 0 24px 24px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 12px; color: var(--muted); font-weight: 500; }
.field input {
  height: 40px; padding: 0 12px; border-radius: 4px; border: 1px solid var(--line);
  background: var(--bg0); color: var(--text); font-size: 14px;
}
.field input:focus { border-color: var(--brand); border-width: 2px; padding: 0 11px; outline: none; }

.result-layout { display: grid; grid-template-columns: 320px 1fr; gap: 24px; margin-top: 24px; }
@media(max-width: 900px) { .result-layout { grid-template-columns: 1fr; } }

.sidebar { display: flex; flex-direction: column; gap: 16px; }
.info-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.info-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.info-row:last-child { border-bottom: none; }
.info-label { color: var(--muted); }
.info-val { color: var(--text); font-weight: 500; }
.info-val.mono { font-family: var(--mono); }

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.img-card { 
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; 
  transition: box-shadow 0.2s; cursor: zoom-in;
}
.img-card:hover { box-shadow: var(--shadow-2); }
.img-head { padding: 12px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; }
.img-title { font-size: 14px; font-weight: 500; color: var(--text); }
.img-wrap { background: var(--bg1); min-height: 200px; display: flex; align-items: center; justify-content: center; }
.img-wrap img { max-width: 100%; display: block; }

/* Modal / Lightbox */
.modal{
  position:fixed; inset:0; display:none; align-items:center; justify-content:center;
  background: rgba(0,0,0,.8); z-index: 200; backdrop-filter: blur(4px);
}
.modal.open{ display:flex; }
.modal-content { max-width: 90vw; max-height: 90vh; position: relative; }
.modal-content img { max-width: 100%; max-height: 90vh; border-radius: 4px; box-shadow: 0 24px 38px 3px rgba(0,0,0,0.14), 0 9px 46px 8px rgba(0,0,0,0.12); }
.modal-close { position: absolute; top: -40px; right: 0; color: white; cursor: pointer; }