/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --bg: #fff;
  --bg-elevated: #f0f0f0;
  --bg-hover: #fafafa;
  --fg: #000;
  --fg-muted: #555;
  --fg-on-accent: #fff;
  --border-color: #000;
  --border-subtle: #e0e0e0;
  --accent: #000;
  --accent-hover: #555;
  --danger: #c00;
  --danger-bg: #fff5f5;
  --danger-fg: #fff;
  --input-bg: #fff;
  --input-bg-focus: #fafafa;
  --input-fg: #000;
  --input-border: #000;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --border: 1px solid var(--border-color);
  --radius: 0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --bg-elevated: #1a1d23;
    --bg-hover: #1f2228;
    --fg: #e5e7eb;
    --fg-muted: #9ca3af;
    --fg-on-accent: #0f1115;
    --border-color: #2a2e36;
    --border-subtle: #272b33;
    --accent: #e5e7eb;
    --accent-hover: #cbd0d8;
    --danger: #f87171;
    --danger-bg: #2a1414;
    --danger-fg: #0f1115;
    --input-bg: #1a1d23;
    --input-bg-focus: #222630;
    --input-fg: #e5e7eb;
    --input-border: #3a3f48;
  }
}

/* ── Base ───────────────────────────────────────────────── */
html { font-size: 14px; }

body {
  font-family: var(--font);
  line-height: 1.5;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 3px;
}
a:hover { color: var(--fg-muted); }

/* ── Header ─────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0 2rem;
  height: 48px;
  border-bottom: var(--border);
  flex-shrink: 0;
}

.logo {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--fg);
}
.logo:hover { color: var(--fg-muted); }

nav {
  display: flex;
  align-items: center;
  gap: 0;
  margin-left: auto;
}

nav a {
  display: block;
  padding: 0 1rem;
  height: 48px;
  line-height: 48px;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--fg-muted);
  border-left: var(--border);
}
nav a:hover {
  color: var(--fg);
  background: var(--bg-elevated);
}

nav form {
  display: contents;
}

nav button[type="submit"] {
  display: block;
  padding: 0 1rem;
  height: 48px;
  font-size: 12px;
  letter-spacing: 0.04em;
  background: none;
  border: none;
  border-left: var(--border);
  color: var(--fg-muted);
  cursor: pointer;
  font-family: var(--font);
}
nav button[type="submit"]:hover {
  color: var(--fg);
  background: var(--bg-elevated);
}

/* ── Main ───────────────────────────────────────────────── */
main {
  flex: 1;
  padding: 3rem 2rem;
}

/* ── Form Container ─────────────────────────────────────── */
.form-container {
  max-width: 400px;
}

.form-container h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: var(--border);
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

input[type="text"],
input[type="password"],
input[type="file"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-family: var(--font);
  font-size: 16px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--input-fg);
  outline: none;
  transition: background 0.1s;
}
input[type="text"]:focus,
input[type="password"]:focus {
  background: var(--input-bg-focus);
  box-shadow: inset 0 0 0 2px var(--accent);
}

input[type="file"] {
  padding: 0.5rem;
  cursor: pointer;
}
input[type="file"]::-webkit-file-upload-button {
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.02em;
  background: var(--accent);
  color: var(--fg-on-accent);
  border: none;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  margin-right: 0.75rem;
}
input[type="file"]::file-selector-button {
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.02em;
  background: var(--accent);
  color: var(--fg-on-accent);
  border: none;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  margin-right: 0.75rem;
}

/* ── Primary Button ─────────────────────────────────────── */
button[type="submit"],
.btn-primary {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--accent);
  color: var(--fg-on-accent);
  border: 1px solid var(--accent);
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
  text-align: center;
}
button[type="submit"]:hover,
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* ── Danger Button ──────────────────────────────────────── */
button.danger {
  display: inline-block;
  padding: 0.3rem 0.6rem;
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.04em;
  background: none;
  color: var(--danger);
  border: 1px solid var(--danger);
  cursor: pointer;
}
button.danger:hover {
  background: var(--danger);
  color: var(--danger-fg);
}

/* ── Generic Link-button (.btn for file-view) ───────────── */
a.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  background: var(--accent);
  color: var(--fg-on-accent);
  border: 1px solid var(--accent);
  transition: background 0.1s;
}
a.btn:hover {
  background: var(--accent-hover);
  color: var(--fg-on-accent);
}

/* ── Error ──────────────────────────────────────────────── */
.error {
  font-size: 12px;
  color: var(--danger);
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--danger);
  background: var(--danger-bg);
  margin-bottom: 0.5rem;
}

/* ── Share Box ──────────────────────────────────────────── */
.share-box {
  display: flex;
  gap: 0;
  margin: 1.25rem 0 1rem;
}

.share-box input[readonly] {
  flex: 1;
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  color: var(--fg-muted);
  border-right: none;
  cursor: text;
}
.share-box input[readonly]:focus {
  box-shadow: none;
  background: var(--bg-elevated);
}

/* Copy button — outline style, distinct from submit */
.share-box button {
  padding: 0.6rem 1rem;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--bg);
  color: var(--fg);
  border: var(--border);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.1s;
  flex-shrink: 0;
}
.share-box button:hover {
  background: var(--bg-elevated);
}

/* ── Table ──────────────────────────────────────────────── */
h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: var(--border);
}

h1 + p {
  margin-bottom: 1.5rem;
  font-size: 12px;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: var(--border);
}

table {
  width: 100%;
  min-width: 100%;
  border-collapse: collapse;
}

th {
  padding: 0.6rem 1rem;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: left;
  background: var(--bg-elevated);
  border-bottom: var(--border);
  color: var(--fg-muted);
}

td {
  padding: 0.6rem 1rem;
  font-size: 12px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

tr:last-child td { border-bottom: none; }

tr:hover td { background: var(--bg-hover); }

td a {
  font-weight: 500;
}

td:last-child {
  width: 160px;
  text-align: right;
  white-space: nowrap;
}

/* ── Copy Link Button ───────────────────────────────────── */
button.copy-link {
  display: inline-block;
  padding: 0.3rem 0.6rem;
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.04em;
  background: var(--bg);
  color: var(--fg);
  border: var(--border);
  cursor: pointer;
  margin-right: 0.4rem;
}
button.copy-link:hover {
  background: var(--bg-elevated);
}

/* ── File View ──────────────────────────────────────────── */
.file-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 48px - 6rem);
  gap: 1.5rem;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.file-view h1 {
  font-size: 13px;
  font-weight: 400;
  color: var(--fg-muted);
  word-break: break-all;
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.file-view img,
.file-view video,
.file-view audio {
  width: 100%;
  max-width: 720px;
  border: var(--border);
  display: block;
}

.file-actions {
  display: flex;
  gap: 0.75rem;
}

/* ── Utility ─────────────────────────────────────────────── */
.form-container > p {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 1rem;
  line-height: 1.7;
}
.form-container > p strong {
  color: var(--fg);
  font-weight: 600;
}
.form-container > p a {
  color: var(--fg);
}