:root {
  color-scheme: light dark;
  --bg: #f3f4ef;
  --paper: #ffffff;
  --ink: #1b1f23;
  --ink-soft: #565f66;
  --line: #d8d9d0;
  --accent: #b3311f;
  --accent-ink: #ffffff;
  --ok: #12776b;
  --danger: #a3271b;
  --radius-photo: 6px;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171a;
    --paper: #1c2024;
    --ink: #eceae2;
    --ink-soft: #9aa0a6;
    --line: #34383d;
    --accent: #ff6a4d;
    --accent-ink: #1b1f23;
    --ok: #3fd0bf;
    --danger: #ff6b5e;
  }
}

:root[data-theme="dark"] {
  --bg: #14171a;
  --paper: #1c2024;
  --ink: #eceae2;
  --ink-soft: #9aa0a6;
  --line: #34383d;
  --accent: #ff6a4d;
  --accent-ink: #1b1f23;
  --ok: #3fd0bf;
  --danger: #ff6b5e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

img { max-width: 100%; }
[hidden] { display: none !important; }

.frame {
  max-width: 1040px;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 3rem;
}

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 1.5px solid var(--line);
  flex-wrap: wrap;
}

.wordmark {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.tagline {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; gap: 2rem; }
}

.panel { min-width: 0; }

.tabs {
  display: flex;
  gap: 1.75rem;
  border-bottom: 1.5px solid var(--line);
  margin-bottom: 1.75rem;
}

.tab {
  appearance: none;
  background: none;
  border: none;
  font: inherit;
  font-size: 1.02rem;
  color: var(--ink-soft);
  padding: 0 0 0.7rem;
  margin-bottom: -1.5px;
  border-bottom: 2.5px solid transparent;
  cursor: pointer;
}

.tab.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 0 0 1.5rem;
  padding: 0;
  border: none;
}

.field-row {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.field-row .field { flex: 1 1 8rem; }

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field-label {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.field.is-compact .field-label { font-size: 0.8rem; }

input[type="text"],
textarea,
select {
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--line);
  padding: 0.5rem 0.1rem;
  border-radius: 0;
  transition: border-color 0.15s ease;
}

input[type="text"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-bottom-color: var(--accent);
}

textarea { resize: vertical; min-height: 4.5rem; }

input[type="file"] {
  font: inherit;
  color: var(--ink-soft);
}

input[type="range"] { accent-color: var(--accent); }
input[type="color"] {
  width: 3rem;
  height: 2.2rem;
  border: 1.5px solid var(--line);
  padding: 2px;
  background: var(--paper);
  cursor: pointer;
}

.hint {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin: -0.6rem 0 0;
}

.check {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.92rem;
  cursor: pointer;
}

.check input { margin-top: 0.3rem; accent-color: var(--accent); }
.check small { display: block; color: var(--ink-soft); font-size: 0.8rem; margin-top: 0.15rem; }

.dropzone {
  border: 1.5px dashed var(--line);
  padding: 1.5rem;
  text-align: center;
  color: var(--ink-soft);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.dropzone.is-dragover { border-color: var(--accent); color: var(--ink); }
.dropzone input[type="file"] { display: none; }
#image-preview { max-height: 5rem; }

button {
  font-family: inherit;
}

.btn-primary,
.btn-secondary,
.btn-ghost,
.btn-danger {
  font: inherit;
  font-size: 0.95rem;
  padding: 0.7rem 1.4rem;
  border-radius: 3px;
  cursor: pointer;
  border: 1.5px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  width: 100%;
}

.btn-primary:disabled { opacity: 0.6; cursor: progress; }

.btn-primary:hover { filter: brightness(1.05); }

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
  display: inline-block;
  text-align: center;
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--line);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border-color: var(--danger);
}

.error {
  color: var(--danger);
  font-size: 0.88rem;
  margin: -0.5rem 0 1rem;
}

.preview-stage {
  position: sticky;
  top: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.preview-frame {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--paper);
  border: 1.5px solid var(--line);
  border-radius: var(--radius-photo);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.preview-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.preview-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.placeholder-grid {
  display: grid;
  grid-template-columns: repeat(3, 1.1rem);
  grid-template-rows: repeat(3, 1.1rem);
  gap: 3px;
}

.placeholder-grid span { background: var(--line); }
.placeholder-grid span:nth-child(2),
.placeholder-grid span:nth-child(4) { background: transparent; }

#download-link { width: 100%; }

.link-manager {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1.5px solid var(--line);
}

.link-manager h2 {
  font-size: 1rem;
  margin: 0 0 0.9rem;
}

.short-url {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.1rem;
  flex-wrap: wrap;
}

.short-url code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9rem;
  word-break: break-all;
}

.link-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.link-note {
  font-size: 0.85rem;
  color: var(--ok);
  margin-top: 0.75rem;
}

.saved-links {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1.5px solid var(--line);
}

.saved-links h2 { font-size: 1rem; margin: 0 0 1rem; }

#saved-links-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

#saved-links-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

#saved-links-list code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

#saved-links-list .target {
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 20rem;
}

.footnote {
  margin-top: 3rem;
  color: var(--ink-soft);
  font-size: 0.8rem;
}

@media (max-width: 800px) {
  .preview-stage { position: static; }
}