:root {
  --bg:
    radial-gradient(circle at 8% 8%, rgba(232, 241, 255, 0.78) 0%, transparent 38%),
    radial-gradient(circle at 88% 12%, rgba(217, 233, 255, 0.62) 0%, transparent 34%),
    linear-gradient(180deg, #f6f9ff 0%, #eff4fd 46%, #ecf2fb 100%);
  --panel: rgba(252, 254, 255, 0.92);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --line: rgba(138, 158, 188, 0.26);
  --line-strong: rgba(122, 146, 188, 0.42);
  --text: #111a2d;
  --muted: #5d6d89;
  --brand: #4f84f3;
  --brand-soft: rgba(79, 132, 243, 0.14);
  --danger: #c95666;
  --danger-soft: rgba(201, 86, 102, 0.14);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --ui: "Manrope", "Noto Sans SC", sans-serif;
  --title: "Manrope", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--ui);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

body.modal-open {
  overflow: hidden;
}

.scene-glow {
  position: fixed;
  width: 280px;
  aspect-ratio: 1;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(2px);
  opacity: 0.55;
  z-index: 0;
}

.scene-glow-a {
  left: -100px;
  top: -72px;
  background: radial-gradient(circle at 45% 45%, rgba(186, 213, 255, 0.75) 0%, rgba(186, 213, 255, 0) 70%);
}

.scene-glow-b {
  right: -110px;
  top: 12%;
  background: radial-gradient(circle at 45% 45%, rgba(214, 231, 255, 0.88) 0%, rgba(214, 231, 255, 0) 72%);
}

.shell {
  position: relative;
  z-index: 1;
  width: min(1120px, 94vw);
  margin: 28px auto;
  display: grid;
  gap: 14px;
}

.glass {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.86),
    0 20px 46px rgba(45, 64, 104, 0.08);
}

.topbar {
  border-radius: 22px;
  padding: 16px 18px;
  background:
    linear-gradient(180deg, rgba(252, 254, 255, 0.96) 0%, rgba(248, 251, 255, 0.92) 100%),
    var(--panel);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-size: 0.74rem;
  color: var(--muted);
}

.topbar h1 {
  margin: 0.45rem 0 0;
  font-family: var(--title);
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--text);
}

.topbar p {
  margin: 0.48rem 0 0;
  color: var(--muted);
}

.controls {
  border-radius: 16px;
  padding: 12px;
  display: grid;
  gap: 8px;
}

.row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-row {
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(146, 166, 198, 0.24);
}

input[type="text"],
input[type="password"] {
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 8px 11px;
  min-width: 220px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.92);
  font-size: 14px;
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
  color: #8a9ab4;
}

button,
.upload-btn {
  border: 1px solid rgba(122, 146, 188, 0.52);
  background: linear-gradient(180deg, rgba(250, 253, 255, 0.96) 0%, rgba(243, 248, 255, 0.98) 100%);
  color: #253554;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition:
    transform 150ms ease,
    border-color 150ms ease,
    box-shadow 150ms ease,
    color 150ms ease,
    background 150ms ease;
}

button:hover,
.upload-btn:hover {
  transform: translateY(-1px);
  border-color: var(--brand);
  color: #1b4ea8;
  box-shadow: 0 10px 18px rgba(79, 132, 243, 0.16);
  background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

button.delete-btn {
  border-color: rgba(201, 86, 102, 0.45);
  color: #8f3040;
  background: linear-gradient(180deg, rgba(255, 247, 249, 0.98) 0%, rgba(255, 239, 243, 0.98) 100%);
}

button.delete-btn:hover {
  border-color: rgba(201, 86, 102, 0.72);
  color: #7f1f2f;
  box-shadow: 0 10px 18px rgba(201, 86, 102, 0.16);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  min-height: 38px;
  padding: 0 2px;
  color: var(--muted);
}

.crumb-btn {
  padding: 5px 8px;
  border-radius: 8px;
  font-size: 12px;
}

.crumb-sep {
  opacity: 0.64;
}

#file-input {
  display: none;
}

.drop-zone {
  border-radius: 14px;
  border-style: dashed;
  border-width: 1px;
  border-color: rgba(122, 146, 188, 0.56);
  padding: 14px;
  text-align: center;
  color: #3c5173;
  background: linear-gradient(180deg, rgba(248, 251, 255, 0.98) 0%, rgba(244, 248, 255, 0.98) 100%);
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.drop-zone.dragging {
  border-color: var(--brand);
  background: linear-gradient(180deg, rgba(247, 251, 255, 0.98) 0%, rgba(238, 245, 255, 0.98) 100%);
  box-shadow:
    0 0 0 3px var(--brand-soft),
    0 14px 30px var(--brand-soft);
}

.table-wrap {
  border-radius: 14px;
  overflow: auto;
}

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

th,
td {
  padding: 10px;
  border-bottom: 1px solid rgba(138, 158, 188, 0.2);
  font-size: 13px;
  text-align: left;
  vertical-align: middle;
}

th {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #617493;
  font-size: 11px;
  background: rgba(248, 251, 255, 0.95);
}

tbody tr {
  transition: background 130ms ease;
}

tbody tr:hover {
  background: rgba(79, 132, 243, 0.08);
}

.folder-row {
  cursor: pointer;
}

.name-btn {
  border: 0;
  background: transparent;
  color: #253554;
  padding: 0;
  margin: 0;
  font: inherit;
  cursor: pointer;
  text-align: left;
}

.name-btn:hover {
  color: #1d58bc;
  text-decoration: underline;
}

.folder-name {
  color: #1f59bb;
  font-weight: 700;
}

.file-name {
  color: #243550;
}

td.actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

td.actions button,
td.actions a {
  padding: 5px 8px;
  font-size: 12px;
}

tr.movable-row {
  cursor: grab;
}

tr.dragging-item {
  opacity: 0.45;
}

.drop-target {
  outline: 1px dashed var(--brand);
  outline-offset: -2px;
  background: rgba(79, 132, 243, 0.12);
}

footer {
  padding: 0 4px;
  color: var(--muted);
  font-size: 13px;
}

.global-drop-mask {
  position: fixed;
  inset: 0;
  z-index: 70;
  background:
    radial-gradient(circle at 50% 50%, rgba(79, 132, 243, 0.2) 0%, rgba(225, 236, 252, 0.82) 72%),
    rgba(229, 238, 252, 0.9);
  display: grid;
  place-items: center;
}

.global-drop-content {
  width: min(460px, 90vw);
  text-align: center;
  border-radius: 18px;
  border: 1px dashed rgba(122, 146, 188, 0.72);
  padding: 24px 18px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 20px 38px rgba(45, 64, 104, 0.12);
}

.global-drop-content h2 {
  margin: 0;
  font-family: var(--title);
  letter-spacing: 0.01em;
  font-size: 1.45rem;
  color: var(--text);
}

.global-drop-content p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.hidden {
  display: none !important;
}

.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(18, 28, 48, 0.34);
  display: grid;
  place-items: center;
  padding: 16px;
}

.preview-dialog {
  width: min(980px, 95vw);
  max-height: calc(100vh - 32px);
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--line-strong);
  background: var(--panel-strong);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    0 24px 46px rgba(32, 53, 90, 0.2);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
}

.preview-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 14px 12px;
  border-bottom: 1px solid rgba(138, 158, 188, 0.22);
}

.preview-kind {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: #6d819f;
}

.preview-head h2 {
  margin: 0.38rem 0 0;
  font-size: clamp(1.1rem, 2.6vw, 1.5rem);
}

.preview-meta {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.preview-head-actions {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.preview-toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(138, 158, 188, 0.2);
  background: rgba(247, 251, 255, 0.95);
}

.preview-toolbar button {
  padding: 6px 10px;
}

.preview-body {
  min-height: 360px;
  overflow: auto;
  padding: 14px;
  background: #f8fbff;
}

.preview-empty {
  margin: 1rem 0;
  color: #4e6386;
}

.preview-image-wrap {
  display: grid;
  place-items: center;
  min-height: 420px;
  border-radius: 12px;
  border: 1px solid rgba(138, 158, 188, 0.24);
  background:
    linear-gradient(45deg, rgba(238, 244, 252, 0.98) 25%, rgba(245, 249, 255, 0.98) 25%, rgba(245, 249, 255, 0.98) 50%, rgba(238, 244, 252, 0.98) 50%, rgba(238, 244, 252, 0.98) 75%, rgba(245, 249, 255, 0.98) 75%, rgba(245, 249, 255, 0.98) 100%);
  background-size: 28px 28px;
}

.preview-image-wrap img {
  max-width: 100%;
  max-height: min(74vh, 780px);
  object-fit: contain;
  transform-origin: center center;
  transition: transform 120ms ease;
  border-radius: 8px;
}

.preview-pdf-wrap {
  min-height: 420px;
  border-radius: 12px;
  border: 1px solid rgba(138, 158, 188, 0.24);
  background: #eef4ff;
  overflow: hidden;
}

.preview-pdf-wrap iframe {
  width: 100%;
  min-height: min(74vh, 780px);
  border: 0;
  background: #ffffff;
}

.preview-doc {
  border: 1px solid rgba(138, 158, 188, 0.22);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  padding: 12px;
}

.preview-doc p,
.preview-doc li,
.preview-doc blockquote,
.preview-doc td,
.preview-doc th {
  color: #21314b;
}

.preview-tip {
  margin: 0 0 10px;
  color: #385582;
  font-size: 0.85rem;
  border-left: 3px solid rgba(79, 132, 243, 0.78);
  padding-left: 10px;
}

.plain-text,
.code-preview {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--mono);
  line-height: 1.54;
  font-size: 13px;
  color: #1f314e;
}

.code-header {
  margin: 0 0 10px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  color: #5d7397;
}

.code-lang {
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tok-keyword {
  color: #245fbf;
}

.tok-string {
  color: #8a4e06;
}

.tok-comment {
  color: #6e809f;
  font-style: italic;
}

.tok-number {
  color: #1f8c4c;
}

.markdown-body {
  line-height: 1.66;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  margin: 1rem 0 0.6rem;
  font-family: var(--title);
  letter-spacing: 0.01em;
  color: #13233a;
}

.markdown-body h1 {
  font-size: 1.75rem;
}

.markdown-body h2 {
  font-size: 1.45rem;
}

.markdown-body h3 {
  font-size: 1.2rem;
}

.markdown-body p {
  margin: 0.66rem 0;
}

.markdown-body ul,
.markdown-body ol {
  margin: 0.5rem 0;
  padding-left: 1.2rem;
}

.markdown-body blockquote {
  margin: 0.8rem 0;
  padding: 0.35rem 0.75rem;
  border-left: 3px solid rgba(79, 132, 243, 0.62);
  background: rgba(79, 132, 243, 0.08);
  border-radius: 6px;
}

.markdown-body code {
  font-family: var(--mono);
  font-size: 0.92em;
  border-radius: 6px;
  padding: 1px 5px;
  background: rgba(79, 132, 243, 0.12);
  color: #214e96;
}

.markdown-body pre.code-preview {
  margin-top: 8px;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(138, 158, 188, 0.26);
  background: #f4f8ff;
  overflow: auto;
  white-space: pre;
}

.markdown-body a {
  color: #1f62c8;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid rgba(138, 158, 188, 0.4);
  margin: 0.9rem 0;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.login-card {
  width: min(430px, 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 18px 36px rgba(45, 64, 104, 0.12);
}

.login-card h1 {
  margin: 0;
  font-family: var(--title);
  letter-spacing: 0.01em;
  font-size: 1.65rem;
  color: var(--text);
}

.login-card p {
  margin: 0.6rem 0 0.9rem;
  color: var(--muted);
}

.login-card form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#login-status {
  margin-top: 12px;
  color: #4b6388;
  font-size: 14px;
}

@media (max-width: 820px) {
  .shell {
    width: 100vw;
    margin: 0;
    padding: 10px;
  }

  .topbar,
  .controls,
  .drop-zone,
  .table-wrap {
    border-radius: 14px;
  }

  th:nth-child(4),
  td:nth-child(4) {
    display: none;
  }

  .preview-dialog {
    width: min(100vw, 100%);
    max-height: 100vh;
    border-radius: 0;
  }

  .preview-modal {
    padding: 0;
  }

  .preview-head {
    flex-direction: column;
  }

  .preview-head-actions {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}