:root {
  --bg: #f4f4f5;
  --card: #ffffff;
  --text: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --error: #dc2626;
  --success: #16a34a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  max-width: 420px;
  margin: 48px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

h1 {
  margin: 0 0 20px;
  font-size: 1.25rem;
  font-weight: 600;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.header h1 {
  margin: 0;
}

label {
  display: block;
  margin-bottom: 16px;
  font-size: 0.875rem;
}

input[type="text"],
input[type="password"],
input[type="number"] {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
}

textarea {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  resize: vertical;
  min-height: 56px;
  font-family: inherit;
}

input:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: var(--accent);
}

button[type="submit"],
button.primary {
  width: 100%;
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

button[type="submit"]:hover:not(:disabled) {
  background: var(--accent-hover);
}

button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.link-btn {
  border: none;
  background: none;
  color: var(--muted);
  font-size: 0.875rem;
  cursor: pointer;
  padding: 0;
}

.link-btn:hover {
  color: var(--text);
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.drop-zone.dragover {
  border-color: var(--accent);
  background: #eff6ff;
}

.drop-zone p {
  margin: 0;
}

.hint {
  color: var(--muted);
  font-size: 0.875rem;
}

.file-info {
  margin-top: 16px;
  padding: 12px;
  background: var(--bg);
  border-radius: 8px;
  font-size: 0.875rem;
}

.upload-info-main {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.status {
  color: var(--muted);
}

.status.uploading {
  color: var(--accent);
}

.status.done {
  color: var(--success);
}

.status.error {
  color: var(--error);
}

.upload-progress {
  margin-top: 12px;
  width: 100%;
}

.upload-progress.hidden {
  display: none;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: #e5e7eb;
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 0.2s ease;
}

.progress-text {
  display: block;
  margin-top: 6px;
  font-size: 0.8125rem;
  color: var(--muted);
}

.upload-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.btn-small {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  font-size: 0.8125rem;
  cursor: pointer;
}

.btn-small:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.success {
  color: var(--success);
  font-size: 0.875rem;
  margin: 8px 0 0;
}

.user-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-size: 0.875rem;
  color: var(--muted);
}

.primary-btn {
  width: 100%;
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

.primary-btn:hover {
  background: var(--accent-hover);
}

.share-form {
  margin-top: 20px;
}

.file-description {
  margin: 0 0 12px;
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--text);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.error {
  color: var(--error);
  font-size: 0.875rem;
  margin: 8px 0 0;
}

.result {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.result a {
  display: block;
  margin: 8px 0 16px;
  color: var(--accent);
  word-break: break-all;
}

.hidden {
  display: none !important;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  cursor: pointer;
  font-size: 0.875rem;
}

.tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px 4px;
  margin: 0 0 16px;
}

.fieldset legend {
  font-size: 0.875rem;
  color: var(--muted);
  padding: 0 4px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.875rem;
}

.checkbox-label input {
  width: auto;
  margin: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg);
  border-radius: 8px;
  padding: 12px;
}

.stat-card strong {
  display: block;
  font-size: 1.25rem;
}

.stat-card span {
  font-size: 0.75rem;
  color: var(--muted);
}

.section-title {
  font-size: 1rem;
  margin: 0 0 12px;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--border);
  padding: 8px 6px;
  vertical-align: top;
}

.data-table th {
  text-align: left;
  color: var(--muted);
  font-weight: 500;
}

.user-limits {
  display: grid;
  gap: 6px;
  min-width: 140px;
}

.user-limits input[type="number"] {
  margin-top: 0;
  padding: 6px 8px;
  font-size: 0.8rem;
}

.btn-small {
  padding: 6px 10px;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 0.8rem;
  cursor: pointer;
}

.storage-limit-form {
  margin-bottom: 16px;
}

.storage-limit-form .btn-small {
  width: auto;
  margin-top: 8px;
}