:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #e2e4e9;
  --text: #1c1e26;
  --text-muted: #6b7280;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121319;
    --surface: #1b1d27;
    --border: #2c2f3a;
    --text: #e7e8ec;
    --text-muted: #9aa0ac;
    --accent: #7c7ff2;
    --accent-hover: #9092f5;
    --danger: #f87171;
    --danger-hover: #fca5a5;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

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

a:hover {
  text-decoration: underline;
}

/* Auth card */

.auth-card {
  max-width: 340px;
  margin: 10vh auto 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  text-align: center;
}

.auth-card h1 {
  margin: 0 0 4px;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
}

.stack label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Form controls */

input[type="text"],
input[type="password"],
input[type="file"] {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
  border-color: var(--accent);
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  transition: background-color 0.15s ease;
}

button:hover {
  background: var(--accent-hover);
}

.link-btn {
  background: none;
  color: var(--text-muted);
  padding: 4px 8px;
}

.link-btn:hover {
  color: var(--text);
  background: none;
  text-decoration: underline;
}

.error {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 10px;
}

/* Topbar */

.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
}

.topbar h1 {
  font-size: 20px;
  letter-spacing: -0.02em;
  margin: 0;
}

.logout-form {
  display: flex;
  align-items: center;
  gap: 10px;
}

.whoami {
  color: var(--text-muted);
  font-size: 13px;
}

/* Upload form */

.upload-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.upload-form input[type="file"] {
  flex: 1;
  min-width: 200px;
}

.visibility-choice {
  display: flex;
  gap: 14px;
  font-size: 13px;
  color: var(--text-muted);
}

.visibility-choice label {
  display: flex;
  align-items: center;
  gap: 4px;
}

.shared-with-input {
  flex: 1;
  min-width: 180px;
}

/* Sections */

.section-title {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 600;
  margin: 32px 0 10px;
}

/* Table */

.files-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.files-table th,
.files-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.files-table th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-weight: 600;
}

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

.col-name a {
  display: inline-block;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: middle;
}

.col-size,
.col-owner {
  color: var(--text-muted);
}

.copy-btn,
.delete-btn,
.share-btn {
  background: none;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 4px 9px;
  border-radius: 6px;
  font-size: 12px;
  margin-left: 8px;
}

.copy-btn:hover,
.share-btn:hover {
  color: var(--text);
}

.delete-btn:hover {
  color: var(--danger-hover);
  border-color: var(--danger-hover);
  background: none;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-public {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
}

.badge-private {
  background: color-mix(in srgb, var(--text-muted) 16%, transparent);
  color: var(--text-muted);
}

.shared-list {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

.share-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.share-form .error {
  flex-basis: 100%;
  margin-bottom: 0;
}

.filename-input {
  flex: 1;
  min-width: 160px;
}

.share-form-actions {
  display: flex;
  gap: 8px;
}

.empty {
  text-align: center;
  color: var(--text-muted);
  padding: 32px 12px;
}

/* File view (landing) page */

.file-view-card {
  max-width: 460px;
  margin: 10vh auto 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  text-align: center;
}

.file-view-name {
  margin: 0 0 20px;
  font-size: 18px;
  letter-spacing: -0.01em;
  word-break: break-word;
}

.file-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0 0 24px;
}

.file-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.file-meta-row dt {
  color: var(--text-muted);
}

.file-meta-row dd {
  margin: 0;
}

.download-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 10px 20px;
  font-weight: 600;
}

.download-btn:hover {
  background: var(--accent-hover);
  text-decoration: none;
}