:root {
  color-scheme: light;
  --bg: #f3f6fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #dde3ed;
  --line-strong: #cbd4e1;
  --blue: #1f64e9;
  --blue-hover: #174fc0;
  --blue-soft: #edf4ff;
  --danger: #df4c47;
  --danger-soft: #fff1f0;
  --shadow: 0 20px 60px rgba(31, 48, 78, 0.1);
  --radius: 10px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

button, input { font: inherit; }
button { cursor: pointer; }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.shell {
  width: min(1440px, calc(100% - 48px));
  margin: 24px auto;
}

.app-view,
.login-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.app-view { min-height: calc(100vh - 48px); }

.login-view {
  min-height: calc(100vh - 48px);
  display: grid;
  place-items: center;
}

.login-card {
  width: min(560px, 100%);
  padding: 44px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  font-size: 22px;
  font-weight: 720;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-login { margin-bottom: 52px; }

.brand-mark {
  position: relative;
  width: 30px;
  height: 30px;
  display: inline-grid;
  place-items: center;
  border: 3px solid var(--blue);
  transform: rotate(45deg);
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  background: var(--surface);
}

.brand-mark::before { width: 10px; height: 36px; }
.brand-mark::after { width: 36px; height: 10px; }
.brand-mark span { width: 12px; height: 12px; background: var(--blue); z-index: 1; }

h1, h2, p { margin-top: 0; }
.login-card h1 { margin-bottom: 10px; font-size: 30px; line-height: 1.2; letter-spacing: 0; }
.login-copy { color: var(--muted); margin-bottom: 32px; }
label { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 700; letter-spacing: 0; color: #475467; }

.token-row { display: flex; gap: 10px; }
input {
  min-width: 0;
  flex: 1;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  color: var(--text);
  background: var(--surface);
  outline: none;
}
input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(31, 100, 233, 0.13); }

.privacy-note { margin: 10px 0 0; color: var(--muted); font-size: 12px; }
.form-error { margin: 16px 0 0; color: var(--danger); font-size: 14px; }

.button {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 8px 14px;
  background: none;
  color: var(--text);
  font-weight: 620;
}

.button:focus-visible,
.icon-button:focus-visible {
  outline: 3px solid rgba(31, 100, 233, 0.24);
  outline-offset: 2px;
}

.button-primary { background: var(--blue); color: white; }
.button-primary:hover { background: var(--blue-hover); }
.button-quiet:hover { background: var(--blue-soft); color: var(--blue); }

.app-header {
  min-height: 78px;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand-group,
.header-actions { display: flex; align-items: center; }
.brand-group { gap: 22px; }
.header-actions { gap: 6px; }
.brand-divider { height: 28px; width: 1px; background: var(--line); }
.subtitle { color: #475467; font-size: 16px; }

.content { padding: 34px 22px 44px; }
.content-heading { display: flex; align-items: baseline; gap: 12px; padding: 0 8px; }
.content h1 { margin-bottom: 24px; font-size: 30px; line-height: 1.2; letter-spacing: 0; }
.file-count { color: var(--muted); font-size: 13px; }

.upload-panel {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(320px, 1.4fr);
  gap: 18px;
  align-items: center;
  margin: 0 8px 24px;
  padding: 18px;
  border: 1px solid #cfdced;
  border-radius: 8px;
  background: linear-gradient(135deg, #ffffff 0%, #f6fbff 100%);
}

.upload-panel h2 {
  margin-bottom: 5px;
  font-size: 18px;
  line-height: 1.25;
}

.rate-limit-status {
  margin: 0;
  color: #237a4b;
  font-size: 13px;
  font-weight: 650;
}

.upload-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.file-picker { margin: 0; }
.file-picker span { display: block; margin-bottom: 7px; }
.file-picker input {
  width: 100%;
  height: auto;
  min-height: 46px;
  padding: 10px 12px;
}

.upload-progress-wrap {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  gap: 10px;
  align-items: center;
}

.upload-progress-wrap progress {
  width: 100%;
  height: 10px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: #dbe5f2;
}

.upload-progress-wrap progress::-webkit-progress-bar {
  background: #dbe5f2;
}

.upload-progress-wrap progress::-webkit-progress-value {
  background: #1f64e9;
}

.upload-progress-wrap progress::-moz-progress-bar {
  background: #1f64e9;
}

.upload-progress-wrap span {
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.upload-status {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.upload-status.error { color: var(--danger); }
.button:disabled { cursor: not-allowed; opacity: 0.62; }

.download-progress-wrap {
  margin: 0 8px 24px;
  padding: 16px 18px;
  border: 1px solid #cfdced;
  border-radius: 8px;
  background: #ffffff;
}

.download-progress-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 10px;
}

.download-progress-header span:first-child {
  min-width: 0;
  color: var(--text);
  font-weight: 650;
  overflow-wrap: anywhere;
}

.download-progress-header span:last-child {
  flex: 0 0 auto;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.download-progress-wrap progress {
  display: block;
  width: 100%;
  height: 10px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: #dbe5f2;
}

.download-progress-wrap progress::-webkit-progress-bar {
  background: #dbe5f2;
}

.download-progress-wrap progress::-webkit-progress-value {
  background: #1f64e9;
}

.download-progress-wrap progress::-moz-progress-bar {
  background: #1f64e9;
}

.download-progress-wrap progress:not([value]) {
  background: linear-gradient(90deg, #dbe5f2 0%, #9fbcf6 50%, #dbe5f2 100%);
}

.download-progress-wrap p {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 13px;
}

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

.file-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 0 8px 22px;
}

.search-field { width: min(360px, 100%); margin: 0; }
.search-field input { width: 100%; padding-left: 38px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23667085' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-4-4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: 12px center; }
.filter-group { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
.filter-button { min-height: 36px; padding: 6px 11px; border-color: var(--line); color: #475467; font-size: 13px; }
.filter-button:hover { border-color: #aebbd0; background: #f8faff; }
.filter-button.active { border-color: #a8c5ff; background: var(--blue-soft); color: var(--blue); }

.status-message {
  margin: 0 8px 16px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  background: #f8fafc;
  border-radius: 6px;
  color: var(--muted);
}
.status-message.error { border-color: #ffc7c4; background: var(--danger-soft); color: #a4312d; }

.file-table-head,
.file-row {
  display: grid;
  grid-template-columns: minmax(200px, 1.65fr) 0.6fr 1.05fr 1.15fr minmax(430px, 2fr);
  align-items: center;
  column-gap: 18px;
}

.file-table-head {
  min-height: 42px;
  padding: 0 14px;
  color: #475467;
  font-size: 12px;
  font-weight: 650;
  border-bottom: 1px solid var(--line-strong);
}

.file-row {
  min-height: 66px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  transition: background-color 120ms ease;
}
.file-row:hover { background: #f8faff; }
.file-name { min-width: 0; font-weight: 650; overflow-wrap: anywhere; }
.file-cell { min-width: 0; color: #344054; }
.file-type { overflow-wrap: anywhere; }
.file-downloads { display: block; color: var(--muted); font-size: 12px; }
.file-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 2px; }
.file-action { min-height: 38px; padding: 7px 10px; color: var(--blue); font-weight: 570; }
.file-action:hover { background: var(--blue-soft); }
.file-action.danger { color: var(--danger); }
.file-action.danger:hover { background: var(--danger-soft); }

.empty-state { padding: 72px 20px; text-align: center; color: var(--muted); }
.empty-state strong { display: block; color: var(--text); font-size: 18px; margin-bottom: 5px; }

.preview-dialog,
.share-dialog {
  width: min(720px, calc(100% - 32px));
  max-height: calc(100vh - 48px);
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--text);
  box-shadow: 0 28px 90px rgba(20, 31, 50, 0.24);
  overflow: hidden;
}
.share-dialog { width: min(760px, calc(100% - 32px)); }
.preview-dialog::backdrop,
.share-dialog::backdrop { background: rgba(18, 28, 45, 0.42); }
.preview-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding: 22px 24px 18px; border-bottom: 1px solid var(--line); }
.preview-header h2 { margin-bottom: 4px; font-size: 20px; overflow-wrap: anywhere; }
.preview-meta { margin: 0; color: var(--muted); font-size: 13px; }
.icon-button { width: 38px; height: 38px; padding: 0; flex: 0 0 auto; border: 1px solid var(--line-strong); border-radius: 6px; background: var(--surface); color: var(--text); font-size: 26px; line-height: 1; }
.preview-body { min-height: 260px; max-height: calc(100vh - 230px); padding: 22px 24px; overflow: auto; background: #f8fafc; }
.preview-body pre { margin: 0; padding: 18px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: #243046; font: 13px/1.65 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.preview-body img { display: block; max-width: 100%; max-height: calc(100vh - 280px); margin: auto; object-fit: contain; }
.preview-body iframe { display: block; width: 100%; height: min(66vh, 760px); border: 0; background: white; }
.preview-footer { display: flex; justify-content: flex-end; padding: 14px 24px; border-top: 1px solid var(--line); }

.button-secondary { border-color: var(--line-strong); background: var(--surface); color: var(--blue); }
.button-secondary:hover { border-color: var(--blue); background: var(--blue-soft); }
.share-body { max-height: calc(100vh - 150px); padding: 22px 24px 26px; overflow: auto; background: #f8fafc; }
.share-form { display: grid; grid-template-columns: 1fr 1fr auto; align-items: end; gap: 12px; padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.share-field { margin: 0; }
.share-field span { display: block; margin-bottom: 7px; }
.share-field input { width: 100%; }
.share-result { margin-top: 16px; padding: 16px; border: 1px solid #b9cff8; border-radius: 8px; background: var(--blue-soft); }
.share-section-label { display: block; margin-bottom: 8px; color: #475467; font-size: 12px; font-weight: 700; }
.share-copy-row { display: flex; gap: 8px; }
.share-copy-row input { width: 100%; font-size: 13px; }
.share-list-section { margin-top: 24px; }
.share-list-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 10px; }
.share-list-heading h3 { margin: 0; font-size: 17px; }
.share-list { display: grid; gap: 10px; }
.share-list-empty { padding: 28px 14px; border: 1px dashed var(--line-strong); border-radius: 8px; color: var(--muted); text-align: center; }
.share-item { padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.share-item-url { width: 100%; height: 40px; font-size: 12px; }
.share-item-meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 18px; margin-top: 9px; color: var(--muted); font-size: 12px; }
.share-item-status.active { color: #237a4b; }
.share-item-status.inactive { color: var(--danger); }
.share-item-actions { display: flex; justify-content: flex-end; gap: 6px; margin-top: 10px; }
.share-item-actions .button { min-height: 36px; padding: 6px 10px; font-size: 13px; }

.toast { position: fixed; left: 50%; bottom: 24px; z-index: 10; max-width: calc(100% - 32px); transform: translateX(-50%); padding: 10px 14px; border-radius: 7px; background: #172033; color: white; box-shadow: var(--shadow); font-size: 13px; }

[hidden] { display: none !important; }

@media (max-width: 900px) {
  .shell { width: min(100% - 24px, 720px); margin: 12px auto; }
  .app-header { padding: 14px 16px; }
  .brand-divider, .subtitle { display: none; }
  .content { padding: 28px 14px 32px; }
  .upload-panel { grid-template-columns: 1fr; align-items: stretch; }
  .upload-form { grid-template-columns: minmax(0, 1fr) auto; }
  .file-tools { align-items: stretch; flex-direction: column; }
  .search-field { width: 100%; }
  .filter-group { justify-content: flex-start; }
  .file-table-head { display: none; }
  .file-list { display: grid; gap: 14px; }
  .file-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 7px 14px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    min-width: 0;
  }
  .file-name { grid-column: 1 / -1; font-size: 17px; margin-bottom: 4px; }
  .file-cell { font-size: 13px; }
  .file-cell::before { content: attr(data-label); display: block; color: var(--muted); font-size: 11px; font-weight: 650; }
  .file-type { grid-column: 1 / -1; }
  .file-actions { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 10px; padding-top: 14px; border-top: 1px solid var(--line); }
  .file-action { min-height: 44px; border: 1px solid var(--line-strong); }
  .file-action:hover { border-color: var(--blue); }
  .file-action.danger { border-color: #f3b5b2; }
  .share-form { grid-template-columns: 1fr 1fr; }
  .share-form .button-primary { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .shell { width: 100%; margin: 0; }
  .app-view { min-height: 100vh; border: 0; border-radius: 0; box-shadow: none; }
  .app-view { background: var(--bg); }
  .app-header { min-height: 66px; position: sticky; top: 0; z-index: 2; background: rgba(255,255,255,0.96); }
  .brand { gap: 9px; font-size: 19px; }
  .brand-mark { width: 24px; height: 24px; }
  .brand-mark::before { width: 8px; height: 30px; }
  .brand-mark::after { width: 30px; height: 8px; }
  .brand-mark span { width: 9px; height: 9px; }
  .header-actions .button { min-width: 44px; padding: 8px; font-size: 19px; }
  .header-actions .button span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .content { padding: 24px 16px 32px; }
  .content h1 { font-size: 28px; margin-bottom: 18px; }
  .upload-panel { margin: 0 0 22px; padding: 16px; }
  .upload-form { grid-template-columns: 1fr; }
  .upload-form .button-primary { min-height: 46px; }
  .upload-progress-wrap { grid-template-columns: minmax(0, 1fr) 40px; }
  .download-progress-wrap { margin: 0 0 22px; padding: 16px; }
  .download-progress-header { align-items: flex-start; }
  .login-view { min-height: 100vh; padding: 16px; }
  .login-card { padding: 30px 22px; }
  .brand-login { margin-bottom: 44px; }
  .login-card h1 { font-size: 27px; }
  .token-row { flex-direction: column; }
  .token-row .button { min-height: 46px; }
  .preview-dialog,
  .share-dialog { width: 100%; height: 100%; max-height: 100%; border: 0; border-radius: 0; }
  .preview-body { max-height: calc(100vh - 182px); }
  .share-body { max-height: calc(100vh - 82px); padding: 18px 16px 28px; }
  .share-form { grid-template-columns: 1fr; padding: 15px; }
  .share-form .button-primary { grid-column: auto; min-height: 46px; }
  .share-copy-row { flex-direction: column; }
  .share-copy-row .button { min-height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}