:root {
  --bg: #eef1f4;
  --bg-accent: #e4e9ef;
  --surface: #ffffff;
  --fg: #1a2332;
  --muted: #5c6b7a;
  --line: #d0d7de;
  --line-strong: #b8c2cc;
  --accent: #2f4a63;
  --accent-soft: #dbe4ee;
  --danger: #5c3a3a;
  --danger-border: #c9b0b0;
  --ok-border: #a8bdb0;
  --focus: #2f4a63;
  --drop-active: #cfd9e4;
  --progress: #2f4a63;
  --radius: 2px;
  --shadow: 0 1px 0 rgba(26, 35, 50, 0.04);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
  background:
    linear-gradient(180deg, #f7f9fb 0%, var(--bg) 40%, var(--bg-accent) 100%);
  background-attachment: fixed;
  color: var(--fg);
  font-family: "DM Sans", "Noto Sans Bengali", "Noto Sans", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  width: min(920px, calc(100% - 1.5rem));
  margin: 1.25rem auto calc(2.5rem + var(--safe-bottom));
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.icon-btn {
  appearance: none;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-top: 0.1rem;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--fg);
  cursor: pointer;
  border-radius: var(--radius);
  transition: transform 120ms ease, background 120ms ease, opacity 120ms ease;
}

.icon-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.icon-btn:active {
  transform: scale(0.96);
}

.icon-btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

.brand {
  min-width: 0;
  flex: 1;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.25rem, 4vw, 1.65rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sub {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
}

.panel {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow);
  margin-bottom: 0.85rem;
}

.panel-title {
  margin: 0 0 0.9rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.login-panel {
  width: 100%;
  max-width: 420px;
}

.login-panel .btn-primary {
  width: 100%;
  min-height: 46px;
}

/* Centered responsive login screen */
body.mode-login {
  min-height: 100dvh;
  min-height: 100vh;
}

body.mode-login .wrap {
  width: min(440px, calc(100% - 1.5rem));
  min-height: calc(100dvh - 2rem - var(--safe-bottom));
  min-height: calc(100vh - 2rem - var(--safe-bottom));
  margin: 1rem auto calc(1rem + var(--safe-bottom));
  display: flex;
  flex-direction: column;
  justify-content: center;
}

body.mode-login .topbar {
  justify-content: center;
  text-align: center;
  margin-bottom: 1.25rem;
}

body.mode-login .brand {
  flex: none;
  width: 100%;
}

body.mode-login .login-panel {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 1.35rem 1.25rem;
}

body.mode-app .wrap {
  width: min(920px, calc(100% - 1.5rem));
}

.upload-panel,
.library-panel {
  width: 100%;
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

label,
.inline-label {
  display: block;
  margin-bottom: 0.85rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.inline-label {
  margin-bottom: 0;
  flex: 1;
  min-width: 140px;
}

input[type="text"],
input[type="password"],
input[type="search"],
select {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.7rem 0.75rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--fg);
  font: inherit;
  border-radius: var(--radius);
}

select {
  cursor: pointer;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) calc(50% - 2px), calc(100% - 11px) calc(50% - 2px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 2rem;
}

input:focus,
select:focus,
.btn:focus-visible,
.menu-btn:focus-visible,
.menu-item:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.6rem 1rem;
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform 120ms ease, opacity 120ms ease, background 120ms ease;
  white-space: nowrap;
}

.btn:hover {
  opacity: 0.94;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-ghost {
  background: #fff;
  color: var(--fg);
  border-color: var(--line-strong);
}

.btn-danger {
  background: #fff;
  color: var(--danger);
  border-color: var(--danger-border);
}

.btn-cancel {
  margin-top: 0.65rem;
}

.drop-zone {
  border: 1px dashed var(--line-strong);
  background: linear-gradient(180deg, #fafbfc 0%, #f3f6f9 100%);
  padding: 1.15rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease;
}

.drop-zone:hover,
.drop-zone:focus {
  border-color: var(--accent);
  outline: none;
}

.drop-zone.is-dragover,
.drop-zone.is-busy {
  background: var(--drop-active);
  border-color: var(--accent);
  border-style: solid;
}

.drop-title {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
  font-weight: 600;
}

.drop-hint {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.progress-wrap {
  margin-top: 0.95rem;
  padding-top: 0.95rem;
  border-top: 1px solid var(--line);
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.45rem;
  font-size: 0.84rem;
  color: var(--muted);
}

#progress-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#progress-pct {
  flex-shrink: 0;
  font-family: "JetBrains Mono", "Noto Sans Bengali", "Courier New", monospace;
  color: var(--fg);
  font-weight: 500;
}

.progress-track {
  height: 8px;
  background: var(--bg-accent);
  border: 1px solid var(--line);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--progress);
  transition: width 80ms linear;
}

.msg {
  margin: 0.85rem 0 0;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  color: var(--fg);
  font-size: 0.88rem;
  overflow-wrap: anywhere;
}

.msg.error {
  border-color: var(--danger-border);
  background: #faf6f6;
}

.msg.ok {
  border-color: var(--ok-border);
  background: #f5faf7;
}

.library-head {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.library-head .panel-title {
  margin: 0;
  flex-shrink: 0;
}

.library-tools {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.45rem;
  flex: 1;
  min-width: 0;
  justify-content: flex-end;
  align-items: center;
}

.tool-search,
.tool-sort {
  margin-top: 0;
  width: auto;
  min-width: 0;
  padding: 0.55rem 0.65rem;
  font-size: 0.88rem;
}

.tool-search {
  flex: 1 1 140px;
  max-width: 280px;
}

.tool-sort {
  flex: 0 1 120px;
  max-width: 140px;
}

.view-toggle {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  background: #fff;
  flex-shrink: 0;
}

.view-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

.view-btn + .view-btn {
  border-left: 1px solid var(--line);
}

.view-btn.is-active {
  background: var(--accent);
  color: #fff;
}

.view-btn:active {
  transform: scale(0.96);
}

.view-btn svg {
  display: block;
}

.file-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
}

.file-grid[data-view="list"] {
  grid-template-columns: 1fr;
  gap: 0.45rem;
}

.file-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--line);
  background: #fafbfc;
  padding: 0.85rem 0.75rem 0.75rem;
  transition: border-color 120ms ease, background 120ms ease;
}

.file-card:hover {
  border-color: var(--line-strong);
  background: #fff;
}

.file-type {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 64px;
  margin-bottom: 0.65rem;
  border: 1px solid var(--line);
  background: var(--accent-soft);
  color: var(--accent);
  font-family: "JetBrains Mono", "Noto Sans Bengali", "Courier New", monospace;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.file-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.35rem;
  margin-bottom: 0.35rem;
  padding-right: 2rem;
}

.file-name {
  display: block;
  min-width: 0;
  flex: 1;
  color: var(--fg);
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1.3;
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-name:hover {
  color: var(--accent);
}

.file-meta {
  color: var(--muted);
  font-size: 0.75rem;
  font-family: "JetBrains Mono", "Noto Sans Bengali", "Courier New", monospace;
  line-height: 1.4;
}

.file-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
}

.menu-btn {
  appearance: none;
  position: absolute;
  top: 0.55rem;
  right: 0.45rem;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg);
  font-size: 1.25rem;
  line-height: 1;
  letter-spacing: 0.05em;
  cursor: pointer;
  border-radius: var(--radius);
}

.menu-btn:hover,
.menu-btn[aria-expanded="true"] {
  background: #fff;
  border-color: var(--line);
}

/* List view layout */
.file-grid[data-view="list"] .file-card {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 36px;
  grid-template-rows: auto auto;
  column-gap: 0.75rem;
  row-gap: 0.15rem;
  align-items: center;
  padding: 0.65rem 0.55rem 0.65rem 0.7rem;
}

.file-grid[data-view="list"] .file-type {
  grid-row: 1 / span 2;
  grid-column: 1;
  width: 56px;
  height: 56px;
  margin: 0;
  font-size: 0.68rem;
}

.file-grid[data-view="list"] .file-card-top {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  padding-right: 0;
  align-items: center;
}

.file-grid[data-view="list"] .file-meta-row {
  grid-column: 2;
  grid-row: 2;
}

.file-grid[data-view="list"] .menu-btn {
  position: static;
  grid-column: 3;
  grid-row: 1 / span 2;
  margin: 0;
  align-self: center;
  justify-self: end;
}

.menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: transparent;
}

.action-menu {
  position: fixed;
  z-index: 50;
  min-width: 148px;
  padding: 0.25rem;
  border: 1px solid var(--line-strong);
  background: #fff;
  box-shadow: 0 8px 24px rgba(26, 35, 50, 0.12);
}

.menu-item {
  appearance: none;
  display: block;
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 0;
  background: transparent;
  color: var(--fg);
  font: inherit;
  font-size: 0.9rem;
  text-align: left;
  cursor: pointer;
}

.menu-item:hover {
  background: var(--accent-soft);
}

.menu-item-danger {
  color: var(--danger);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(26, 35, 50, 0.35);
}

.modal-card {
  width: min(400px, 100%);
  border: 1px solid var(--line);
  background: #fff;
  padding: 1.15rem 1.2rem;
  box-shadow: 0 12px 32px rgba(26, 35, 50, 0.18);
}

.modal-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.modal-text {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.92rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

[hidden] {
  display: none !important;
}

@media (max-width: 640px) {
  .wrap {
    width: calc(100% - 1rem);
    margin-top: 0.85rem;
  }

  body.mode-login .wrap {
    width: calc(100% - 1.25rem);
    min-height: calc(100dvh - 1.5rem - var(--safe-bottom));
    min-height: calc(100vh - 1.5rem - var(--safe-bottom));
    margin: 0.75rem auto calc(0.75rem + var(--safe-bottom));
  }

  body.mode-login .login-panel {
    padding: 1.15rem 1rem;
  }

  body.mode-login .brand h1 {
    font-size: clamp(1.35rem, 6vw, 1.7rem);
  }

  .topbar {
    flex-direction: row;
    align-items: flex-start;
  }

  .library-head {
    gap: 0.4rem;
  }

  .library-head .panel-title {
    display: none;
  }

  .library-tools {
    width: 100%;
  }

  .tool-search {
    flex: 1 1 auto;
    max-width: none;
    min-width: 0;
  }

  .tool-sort {
    flex: 0 0 auto;
    width: 5.75rem;
    max-width: 5.75rem;
    padding-left: 0.45rem;
    padding-right: 1.4rem;
  }

  .view-btn {
    width: 34px;
    height: 34px;
  }

  .file-grid[data-view="grid"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem;
  }

  .file-card {
    padding: 0.7rem 0.6rem 0.65rem;
  }

  .file-type {
    height: 52px;
    font-size: 0.7rem;
  }

  .file-name {
    font-size: 0.82rem;
  }

  /* Show long names with controlled wrap on narrow screens (grid) */
  .file-grid[data-view="grid"] .file-name {
    white-space: normal;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    overflow: hidden;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .file-grid[data-view="list"] .file-card {
    grid-template-columns: 48px minmax(0, 1fr) auto;
  }

  .file-grid[data-view="list"] .file-type {
    width: 48px;
    height: 48px;
  }

  .file-grid[data-view="list"] .file-name {
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-word;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
  }
}

@media (max-width: 380px) {
  .file-grid[data-view="grid"] {
    grid-template-columns: 1fr;
  }
}