:root {
  color-scheme: light dark;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  --radius-sm: 6px;
  --radius-md: 12px;

  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-hover: #f6f7f9;
  --border: #e3e5e9;
  --text: #16181d;
  --muted: #6b7078;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-contrast: #ffffff;
  --accent-soft: #eef0fe;
  --danger: #dc2626;
  --danger-soft: #fdedec;
  --success: #15803d;
  --success-soft: #eefbf1;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);

  --transition: 150ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f13;
    --surface: #18191f;
    --surface-hover: #1f212a;
    --border: #2b2d36;
    --text: #eef0f3;
    --muted: #92969f;
    --accent: #818cf8;
    --accent-hover: #a5b0fb;
    --accent-contrast: #0e0f13;
    --accent-soft: rgba(129, 140, 248, 0.14);
    --danger: #f87171;
    --danger-soft: rgba(248, 113, 113, 0.12);
    --success: #4ade80;
    --success-soft: rgba(74, 222, 128, 0.12);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: var(--space-6) var(--space-4);
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 640px;
  margin: 0 auto;
}

.icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

header.page-header {
  max-width: 640px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand:hover { text-decoration: none; }

.brand .icon {
  width: 24px;
  height: 24px;
  padding: 4px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

a:focus-visible,
button:focus-visible,
.btn:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
}

.card + .card { margin-top: var(--space-4); }

.card-section {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.card-section:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.card-section.spacious { margin-top: var(--space-6); }

.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.card-header-row h2 { margin: 0; }

/* View/edit mode toggle for the bucket details card - a hidden checkbox
   toggled by <label for="bucket-edit-toggle">, so switching modes needs no
   JS. Close/delete only appear in edit mode. */
.mode-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.bucket-edit-panel { display: none; }

#bucket-edit-toggle:checked ~ .bucket-view-panel { display: none; }
#bucket-edit-toggle:checked ~ .bucket-edit-panel { display: block; }
#bucket-edit-toggle:checked ~ .card-header-row .edit-toggle-btn { display: none; }

.page-title {
  margin: 0 0 var(--space-2);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.page-subtitle {
  margin: 0 0 var(--space-5);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

h1, h2, h3 {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h2 { font-size: 19px; }

h3 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: var(--space-3);
}

p { margin: 0 0 var(--space-3); }
p:last-child { margin-bottom: 0; }

label {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 600;
  font-size: 13px;
  margin-top: var(--space-4);
  margin-bottom: var(--space-1);
}

label:first-child { margin-top: 0; }

.form-section { margin-top: var(--space-6); }
.form-section:first-child { margin-top: 0; }

.help-text {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  margin: var(--space-1) 0 0;
}

.help-text .icon { flex-shrink: 0; margin-top: 2px; }

input[type="text"],
input[type="password"],
input[type="email"],
input[type="file"],
textarea,
select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:hover, textarea:hover, select:hover { border-color: var(--muted); }

input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea { min-height: 100px; resize: vertical; }

/* Item-type segmented control (public submission form) */
.item-type-choice {
  display: flex;
  gap: 2px;
  margin-top: var(--space-2);
  padding: 3px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.item-type-choice label {
  position: relative;
  flex: 1;
  margin: 0;
  padding: 7px 8px;
  border-radius: calc(var(--radius-sm) - 2px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-weight: 500;
  font-size: 13px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.item-type-choice input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.item-type-choice label:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

form:has(#type-secret:checked) label[for="type-secret"],
form:has(#type-text:checked) label[for="type-text"],
form:has(#type-file:checked) label[for="type-file"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.item-type-fields { display: none; }

form:has(#type-secret:checked) #fields-secret,
form:has(#type-text:checked) #fields-text,
form:has(#type-file:checked) #fields-file {
  display: block;
}

.secret-input {
  padding: 14px 16px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 16px;
  letter-spacing: 0.02em;
  border: 2px solid var(--accent);
  background: var(--accent-soft);
}

.secret-input:hover { border-color: var(--accent-hover); }

.secret-input:focus-visible {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

button, .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 9px 16px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--accent-contrast);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

button:hover, .btn:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  text-decoration: none;
}

button:active, .btn:active { transform: translateY(1px); }

button:disabled, .btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

button.secondary, .btn.secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

button.secondary:hover, .btn.secondary:hover {
  background: var(--surface-hover);
  border-color: var(--muted);
}

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

button.danger:hover, .btn.danger:hover {
  background: var(--danger);
  color: #fff;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.button-row:first-child { margin-top: 0; }

form.inline { display: inline-flex; }

.item-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.item-list li {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}

.item-list li:last-child { border-bottom: none; }

.item-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.item-title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-width: 0;
  font-weight: 600;
}

.item-title .icon { color: var(--muted); }

.item-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-1);
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}

.item-meta .icon { width: 13px; height: 13px; }

.item-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.icon-btn {
  padding: 8px;
  gap: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--accent-soft);
  color: var(--accent);
}

.badge.muted {
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--border);
}

.flash {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
  font-size: 14px;
  border-left: 3px solid transparent;
}

.flash .icon { flex-shrink: 0; margin-top: 2px; }

.flash.success {
  background: var(--success-soft);
  border-left-color: var(--success);
}
.flash.success .icon { color: var(--success); }

.flash.error {
  background: var(--danger-soft);
  border-left-color: var(--danger);
}
.flash.error .icon { color: var(--danger); }

.url-row {
  display: flex;
  align-items: stretch;
  gap: var(--space-2);
}

.url-row .bucket-url {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
}

.copy-btn { flex-shrink: 0; }

.reveal-box, .bucket-url {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  word-break: break-all;
}

.reveal-box {
  background: var(--accent-soft);
  border-color: var(--accent);
  white-space: pre-wrap;
  margin-top: var(--space-2);
}

footer.page-footer {
  max-width: 640px;
  margin: var(--space-6) auto 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}