:root {
  --bg: #f4f7f9;
  --card: #ffffff;
  --border: #dde4ea;
  --text: #13212b;
  --muted: #5b6b78;
  --accent: #0d9488;
  --accent-dark: #0f766e;
  --accent-soft: #e6f6f4;
  --danger: #dc2626;
  --warn-bg: #fff7e6;
  --radius: 14px;
  --shadow: 0 4px 18px rgba(16, 38, 54, 0.07);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { color: var(--accent-dark); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
[hidden] { display: none !important; }

.app { max-width: 980px; margin: 0 auto; padding: 1rem 1rem 2.5rem; }
.app-header { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; flex-wrap: wrap; padding: 0.5rem 0 1rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; color: inherit; }
.brand-name { font-weight: 800; font-size: 1.5rem; letter-spacing: -0.02em; line-height: 1.1; }
.brand-name span { color: var(--accent); }
.brand-tag { font-size: 0.85rem; color: var(--muted); }
.lang select, select, input[type="text"], input[type="number"] {
  font: inherit; color: inherit; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 0.5rem 0.7rem; min-height: 42px;
}
input[type="text"] { width: 100%; }

.privacy-banner { display: flex; gap: 0.8rem; align-items: center; background: var(--accent-soft); border: 1px solid #b7e4de; color: #0b4f49; border-radius: var(--radius); padding: 0.85rem 1rem; margin-bottom: 1.25rem; }
.privacy-banner svg { flex: none; color: var(--accent); }
.privacy-banner strong { display: block; font-size: 1.05rem; }
.privacy-banner span { font-size: 0.92rem; }

.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.9rem; }
.tool-card { text-align: left; font: inherit; color: inherit; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem; cursor: pointer; box-shadow: var(--shadow); transition: transform .12s, border-color .12s; display: flex; flex-direction: column; gap: 0.35rem; }
.tool-card:hover, .tool-card:focus-visible { transform: translateY(-2px); border-color: var(--accent); outline: none; }
.tool-icon { font-size: 1.6rem; width: 46px; height: 46px; display: grid; place-items: center; background: var(--accent-soft); border-radius: 12px; }
.tool-card h3 { font-size: 1.05rem; }
.tool-card p { font-size: 0.9rem; color: var(--muted); }

.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem; box-shadow: var(--shadow); }
.tool-head { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 1rem; }
.tool-head h2 { font-size: 1.4rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem; font: inherit; font-weight: 600; border: none; border-radius: 10px; padding: 0.65rem 1.1rem; min-height: 44px; background: var(--accent); color: #fff; cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--accent-dark); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: #eef2f5; }
.btn-sm { padding: 0.3rem 0.55rem; min-height: 34px; font-size: 0.85rem; }
.btn-back { margin-bottom: 0.8rem; }

.dropzone { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.4rem; border: 2px dashed #9fd8d1; background: #fbfefe; border-radius: var(--radius); padding: 1.8rem 1rem; text-align: center; cursor: pointer; color: var(--muted); transition: background .12s, border-color .12s; }
.dropzone:hover, .dropzone.over { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-dark); }
.dropzone .dz-icon { font-size: 2rem; }
.dropzone input { display: none; }

.file-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; margin: 1rem 0; }
.file-item { display: flex; align-items: center; gap: 0.6rem; background: #f8fafb; border: 1px solid var(--border); border-radius: 10px; padding: 0.5rem 0.6rem; }
.file-item.dragging { opacity: 0.4; }
.file-item .fi-thumb { width: 40px; height: 40px; object-fit: cover; border-radius: 6px; background: #e5eaee; flex: none; display: grid; place-items: center; font-size: 1.2rem; }
.file-item .fi-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .fi-meta { color: var(--muted); font-size: 0.82rem; white-space: nowrap; }
.file-item .fi-actions { display: flex; gap: 0.25rem; flex: none; }
.drag-handle { cursor: grab; color: var(--muted); user-select: none; }

.options { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.8rem; margin: 1rem 0; }
.field { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.92rem; }
.field > span { font-weight: 600; }
.check { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; }
.check input { width: 20px; height: 20px; accent-color: var(--accent); }
.radio-group { display: flex; flex-direction: column; gap: 0.35rem; }
.radio-group label { display: flex; gap: 0.5rem; align-items: center; font-weight: 400; }
.radio-group input { accent-color: var(--accent); width: 18px; height: 18px; }
.note { background: var(--warn-bg); border: 1px solid #f5d9a6; border-radius: 10px; padding: 0.6rem 0.8rem; font-size: 0.88rem; margin: 0.6rem 0; }
.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; margin-top: 0.8rem; }
.status { margin-top: 0.8rem; font-weight: 600; }
.status.error { color: var(--danger); }
.result { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: center; background: var(--accent-soft); border-radius: 12px; padding: 0.8rem 1rem; }
.result .r-text { flex: 1; min-width: 180px; }
progress { width: 100%; height: 8px; accent-color: var(--accent); }

.thumb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 0.8rem; margin: 1rem 0; }
.thumb { background: #f8fafb; border: 1px solid var(--border); border-radius: 12px; padding: 0.5rem; display: flex; flex-direction: column; align-items: center; gap: 0.4rem; position: relative; }
.thumb.dragging { opacity: 0.4; }
.thumb.drop-target { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
.thumb .t-img { width: 100%; aspect-ratio: 1; display: grid; place-items: center; overflow: hidden; cursor: grab; }
.thumb canvas, .thumb img { max-width: 100%; max-height: 100%; box-shadow: 0 1px 4px rgba(0,0,0,.18); background: #fff; transition: transform .2s; }
.thumb .t-label { font-size: 0.8rem; color: var(--muted); }
.thumb .t-actions { display: flex; flex-wrap: wrap; gap: 0.2rem; justify-content: center; }
.thumb.deleted .t-img { opacity: 0.25; filter: grayscale(1); }
.thumb.deleted::after { content: "✕"; position: absolute; top: 30%; left: 50%; transform: translate(-50%, -50%); font-size: 2.5rem; color: var(--danger); pointer-events: none; }

.donate { margin-top: 1.5rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.8rem; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.2rem; }
.donate p { color: var(--muted); font-size: 0.9rem; }
.btn-donate { background: #f59e0b; color: #1f1300; }
.btn-donate:hover { background: #d97706; color: #1f1300; }
.app-footer { margin-top: 1.5rem; text-align: center; font-size: 0.9rem; }
.app-footer p + p { margin-top: 0.3rem; }

/* legal pages */
.legal-page { max-width: 760px; margin: 0 auto; padding: 1.2rem 1rem 3rem; }
.legal-nav { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.legal-page h1 { font-size: 1.7rem; margin-bottom: 0.4rem; }
.legal-lead { color: var(--muted); margin-bottom: 1rem; }
.legal-page .panel h2 { font-size: 1.1rem; margin: 1.1rem 0 0.4rem; }
.legal-page .panel h2:first-child { margin-top: 0; }
.legal-page ul { margin: 0.3rem 0 0.3rem 1.3rem; }
.legal-page p { margin-bottom: 0.4rem; }
.en-summary { margin-top: 1.2rem; padding: 1rem 1.2rem; border-radius: var(--radius); background: #eef2f5; font-size: 0.92rem; }
.en-summary h2 { font-size: 1rem; margin-bottom: 0.4rem; }
.footer-note { margin-top: 1.2rem; text-align: center; font-size: 0.9rem; }

@media (max-width: 560px) {
  .brand-name { font-size: 1.3rem; }
  .panel { padding: 0.9rem; }
  .thumb-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
  .file-item .fi-meta { display: none; }
  .tool-grid { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
  .tool-card { padding: 0.8rem; }
  .tool-card h3 { font-size: 0.95rem; }
  .tool-card p { font-size: 0.8rem; }
  .tool-icon { width: 38px; height: 38px; font-size: 1.3rem; }
  .privacy-banner { padding: 0.7rem 0.8rem; }
}