/* ═══════════════════════════════════════════════════════════════
   Secure Document Room — Design System
   Theme: Dark Utilitarian / Institutional
   Fonts: DM Mono (headings) + DM Sans (body)
═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

/* ── Variables ──────────────────────────────────────────────── */
:root {
  --bg-base:        #0d1117;
  --bg-surface:     #161b22;
  --bg-elevated:    #1c2230;
  --bg-hover:       #21293a;

  --border:         #2a3447;
  --border-subtle:  #1e2738;
  --border-accent:  #d4920a;

  --text-primary:   #e8edf5;
  --text-secondary: #8b97ab;
  --text-muted:     #4a5568;
  --text-inverse:   #0d1117;

  --amber:          #f0a500;
  --amber-dim:      #d4920a;
  --amber-glow:     rgba(240,165,0,0.12);
  --amber-subtle:   rgba(240,165,0,0.06);

  --red:            #e05252;
  --red-dim:        #c43e3e;
  --red-subtle:     rgba(224,82,82,0.1);

  --green:          #3fb68b;
  --green-subtle:   rgba(63,182,139,0.1);

  --blue:           #4f8ef7;
  --blue-subtle:    rgba(79,142,247,0.1);

  --font-mono:      'DM Mono', 'Fira Code', monospace;
  --font-sans:      'DM Sans', system-ui, sans-serif;

  --radius-sm:      4px;
  --radius:         6px;
  --radius-lg:      10px;

  --shadow-sm:      0 1px 3px rgba(0,0,0,0.4);
  --shadow:         0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:      0 12px 40px rgba(0,0,0,0.6);
  --shadow-amber:   0 0 24px rgba(240,165,0,0.15);

  --transition:     150ms cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-w:      260px;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  background:  var(--bg-base);
  color:       var(--text-primary);
  line-height: 1.6;
  min-height:  100vh;
}

a { color: var(--amber); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--amber-dim); }

img { max-width: 100%; display: block; }

/* ── Layout ─────────────────────────────────────────────────── */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

.app-topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.5rem;
  height: 56px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  text-decoration: none;
  width: calc(var(--sidebar-w) - 1.5rem);
  flex-shrink: 0;
}

.brand-icon {
  width: 28px; height: 28px;
  background: var(--amber);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.brand-icon svg { width: 16px; height: 16px; color: var(--bg-base); }

.topbar-spacer { flex: 1; }

.topbar-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.user-avatar {
  width: 30px; height: 30px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--amber);
  font-weight: 500;
}

.topbar-search {
  flex: 1;
  max-width: 360px;
  position: relative;
}

.topbar-search input {
  width: 100%;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.4rem 0.75rem 0.4rem 2.2rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  outline: none;
  transition: border-color var(--transition);
}

.topbar-search input:focus { border-color: var(--amber-dim); }
.topbar-search input::placeholder { color: var(--text-muted); }

.topbar-search .search-icon {
  position: absolute;
  left: 0.65rem; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 14px; height: 14px;
}

/* ── Sidebar ─────────────────────────────────────────────────── */
.app-sidebar {
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  padding: 1rem 0;
  overflow-y: auto;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
}

.sidebar-section { margin-bottom: 1.5rem; }

.sidebar-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 0 1rem 0.4rem;
}

.sidebar-nav { list-style: none; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
}

.sidebar-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.sidebar-nav a.active {
  color: var(--amber);
  border-left-color: var(--amber);
  background: var(--amber-subtle);
}

.sidebar-nav svg { width: 15px; height: 15px; flex-shrink: 0; }

.sidebar-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 0.75rem 1rem;
}

/* ── Main Content ────────────────────────────────────────────── */
.app-main {
  padding: 2rem;
  overflow-y: auto;
  min-width: 0;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.page-title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.page-subtitle {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* ── Breadcrumb ──────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--amber); }
.breadcrumb-sep { color: var(--text-muted); }
.breadcrumb-current { color: var(--text-primary); }

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.card-sm { padding: 1rem 1.25rem; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1;
}

.stat-meta { font-size: 0.78rem; color: var(--text-secondary); }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.83rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn svg { width: 14px; height: 14px; }

.btn-primary {
  background: var(--amber);
  color: var(--text-inverse);
  border-color: var(--amber);
}
.btn-primary:hover {
  background: var(--amber-dim);
  border-color: var(--amber-dim);
  color: var(--text-inverse);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

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

.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.78rem; }
.btn-lg { padding: 0.65rem 1.4rem; font-size: 0.9rem; }

/* ── File / Folder Table ─────────────────────────────────────── */
.file-table-wrap {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.file-table th {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0.65rem 1rem;
  text-align: left;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.file-table td {
  padding: 0.7rem 1rem;
  font-size: 0.84rem;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

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

.file-table tr:hover td { background: var(--bg-hover); }

.file-icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.file-icon-folder { background: var(--amber-subtle); color: var(--amber); }
.file-icon-pdf    { background: rgba(224,82,82,0.12); color: var(--red); }
.file-icon-image  { background: rgba(63,182,139,0.12); color: var(--green); }
.file-icon-doc    { background: var(--blue-subtle); color: var(--blue); }
.file-icon-other  { background: var(--bg-elevated); color: var(--text-muted); }

.file-name-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.file-name { font-weight: 500; color: var(--text-primary); }
.file-name a { color: var(--text-primary); }
.file-name a:hover { color: var(--amber); }

.file-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.file-actions {
  display: flex;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity var(--transition);
}

.file-table tr:hover .file-actions { opacity: 1; }

/* ── Forms ───────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.55rem 0.85rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
  border-color: var(--amber-dim);
  box-shadow: 0 0 0 3px var(--amber-glow);
}

.form-control::placeholder { color: var(--text-muted); }

.form-control.is-invalid { border-color: var(--red); }
.form-control.is-invalid:focus { box-shadow: 0 0 0 3px var(--red-subtle); }

.form-hint {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.form-error {
  font-size: 0.78rem;
  color: var(--red);
  margin-top: 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.errorlist { list-style: none; }
.errorlist li {
  font-size: 0.78rem;
  color: var(--red);
  padding: 0.2rem 0;
}

/* ── Upload Drop Zone ────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-base);
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--amber);
  background: var(--amber-subtle);
}

.upload-zone-icon {
  width: 48px; height: 48px;
  margin: 0 auto 1rem;
  color: var(--text-muted);
}

.upload-zone h3 {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.upload-zone p { font-size: 0.82rem; color: var(--text-secondary); }

/* ── Alerts / Messages ───────────────────────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  border: 1px solid;
  font-size: 0.84rem;
  margin-bottom: 1rem;
}

.alert svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 1px; }

.alert-success  { background: var(--green-subtle);  border-color: var(--green); color: var(--green); }
.alert-error,
.alert-danger   { background: var(--red-subtle);    border-color: var(--red);   color: var(--red); }
.alert-warning  { background: var(--amber-subtle);  border-color: var(--amber); color: var(--amber); }
.alert-info     { background: var(--blue-subtle);   border-color: var(--blue);  color: var(--blue); }

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.5rem;
  border-radius: 99px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-amber   { background: var(--amber-subtle);  color: var(--amber); }
.badge-green   { background: var(--green-subtle);  color: var(--green); }
.badge-red     { background: var(--red-subtle);    color: var(--red); }
.badge-blue    { background: var(--blue-subtle);   color: var(--blue); }
.badge-neutral { background: var(--bg-elevated);   color: var(--text-secondary); }

/* ── Modal ───────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  animation: modal-in 0.18s ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.96) translateY(-8px); }
  to   { opacity: 1; transform: none; }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.modal-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
}

.modal-close {
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); padding: 0.2rem;
  transition: color var(--transition);
}
.modal-close:hover { color: var(--text-primary); }

/* ── Auth pages ──────────────────────────────────────────────── */
.auth-layout {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-base);
  padding: 2rem 1rem;
  position: relative;
  overflow: hidden;
}

/* Grid pattern background */
.auth-layout::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 0%, transparent 100%);
  opacity: 0.5;
}

.auth-box {
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.03em;
}

.auth-logo-icon {
  width: 36px; height: 36px;
  background: var(--amber);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
}

.auth-logo-icon svg { width: 20px; height: 20px; color: var(--bg-base); }

.auth-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.auth-title {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.auth-subtitle {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.auth-divider {
  text-align: center;
  position: relative;
  margin: 1.25rem 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.auth-divider::before {
  content: '';
  position: absolute;
  top: 50%; left: 0; right: 0;
  height: 1px;
  background: var(--border);
}

.auth-divider span {
  position: relative;
  background: var(--bg-surface);
  padding: 0 0.75rem;
}

/* ── Pagination ──────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  justify-content: center;
  padding-top: 1rem;
}

.page-link {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  transition: all var(--transition);
}

.page-link:hover,
.page-link.active {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--text-inverse);
}

/* ── Utilities ───────────────────────────────────────────────── */
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center{ align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1       { gap: 0.5rem; }
.gap-2       { gap: 1rem; }
.gap-3       { gap: 1.5rem; }
.mt-1        { margin-top: 0.5rem; }
.mt-2        { margin-top: 1rem; }
.mt-3        { margin-top: 1.5rem; }
.mb-1        { margin-bottom: 0.5rem; }
.mb-2        { margin-bottom: 1rem; }
.text-muted  { color: var(--text-muted); }
.text-sm     { font-size: 0.8rem; }
.mono        { font-family: var(--font-mono); }
.w-full      { width: 100%; }
.hidden      { display: none !important; }

/* ── Scrollbar ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .app-sidebar {
    display: none;
    position: fixed;
    z-index: 150;
    height: 100vh;
    top: 0;
    left: 0;
    width: var(--sidebar-w);
  }

  .app-sidebar.open { display: block; }
  .app-main { padding: 1rem; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

.fade-in { animation: fade-in 0.25s ease both; }

.stagger > * { animation: fade-in 0.25s ease both; }
.stagger > *:nth-child(1) { animation-delay: 0.04s; }
.stagger > *:nth-child(2) { animation-delay: 0.08s; }
.stagger > *:nth-child(3) { animation-delay: 0.12s; }
.stagger > *:nth-child(4) { animation-delay: 0.16s; }
.stagger > *:nth-child(5) { animation-delay: 0.20s; }