/* ═══════════════════════════════════════════
   PI SERVER — STYLESHEET
   Dark professional theme with color coding
═══════════════════════════════════════════ */

:root {
  --bg:           #0b0f18;
  --bg-2:         #111827;
  --bg-card:      #161c2d;
  --bg-hover:     #1e2640;
  --border:       #252d42;
  --border-light: #2e3852;
  --text:         #e8edf5;
  --text-muted:   #8892aa;
  --text-dim:     #55637a;
  --accent:       #6366f1;
  --accent-2:     #818cf8;
  --accent-glow:  rgba(99,102,241,.18);
  --personal:     #ec4899;
  --personal-2:   #f472b6;
  --personal-bg:  rgba(236,72,153,.12);
  --work:         #10b981;
  --work-2:       #34d399;
  --work-bg:      rgba(16,185,129,.12);
  --danger:       #ef4444;
  --danger-bg:    rgba(239,68,68,.12);
  --success:      #22c55e;
  --warning:      #f59e0b;
  --r:            12px;
  --r-sm:         8px;
  --r-lg:         16px;
  --shadow:       0 4px 20px rgba(0,0,0,.4);
  --shadow-lg:    0 8px 48px rgba(0,0,0,.55);
  --font: 'Nunito', sans-serif;
}

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

html { font-size: 15px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

/* ── VIEWS ────────────────────────────────── */
.view { display: none; min-height: 100vh; }
.view.active { display: flex; }

/* ══════════════════════════════════════════
   LOGIN
══════════════════════════════════════════ */
#view-login, #view-change-password {
  align-items: center;
  justify-content: center;
  position: relative;
}

.login-bg {
  position: fixed; inset: 0; z-index: 0; overflow: hidden;
  background: var(--bg);
}

.mesh {
  position: absolute; inset: -30%; width: 160%; height: 160%;
  background:
    radial-gradient(ellipse at 15% 15%, rgba(99,102,241,.25) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 85%, rgba(139,92,246,.2) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(16,185,129,.07) 0%, transparent 60%);
  animation: meshAnim 18s ease-in-out infinite alternate;
}
.mesh2 {
  background:
    radial-gradient(ellipse at 80% 10%, rgba(16,185,129,.25) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 90%, rgba(99,102,241,.2) 0%, transparent 50%);
  animation: meshAnim 20s ease-in-out infinite alternate-reverse;
}
@keyframes meshAnim {
  from { transform: translate(0,0) rotate(0deg) scale(1); }
  to   { transform: translate(-4%,-3%) rotate(4deg) scale(1.05); }
}

.login-card {
  position: relative; z-index: 1;
  background: rgba(22,28,45,.88);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 44px 40px;
  width: min(420px, calc(100vw - 32px));
  box-shadow: var(--shadow-lg);
  animation: cardIn .5s cubic-bezier(.22,1,.36,1);
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(24px) scale(.97); }
  to   { opacity: 1; transform: none; }
}

.login-logo { text-align: center; margin-bottom: 32px; }
.logo-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 14px;
  background: var(--accent-glow);
  margin-bottom: 12px;
}
.logo-icon.small { width: 32px; height: 32px; border-radius: 8px; }
.success-icon { font-size: 36px; background: none; }
.login-logo h1 { font-size: 1.75rem; font-weight: 900; letter-spacing: -.5px; }
.login-logo p  { color: var(--text-muted); margin-top: 4px; font-size: .9rem; }

/* Form */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: .85rem; font-weight: 700; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .5px; }
input[type="text"], input[type="password"], input[type="email"], select, textarea {
  width: 100%; padding: 11px 14px;
  background: var(--bg-2); border: 1.5px solid var(--border-light);
  border-radius: var(--r-sm); color: var(--text); font-family: var(--font); font-size: .95rem;
  transition: border-color .2s, box-shadow .2s; outline: none;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
input::placeholder { color: var(--text-dim); }

.input-wrap { position: relative; }
.input-wrap input { padding-right: 44px; }
.eye-btn {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; font-size: 1rem; opacity: .5;
  transition: opacity .2s;
}
.eye-btn:hover { opacity: 1; }

.pass-strength { margin-top: 6px; height: 4px; border-radius: 2px; background: var(--border); overflow: hidden; }
.pass-strength .bar { height: 100%; border-radius: 2px; transition: width .3s, background .3s; }

/* Buttons */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: var(--r-sm); border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white; font-family: var(--font); font-size: .95rem; font-weight: 700;
  transition: transform .15s, box-shadow .2s, filter .2s;
}
.btn-primary:hover { filter: brightness(1.1); box-shadow: 0 4px 16px var(--accent-glow); transform: translateY(-1px); }
.btn-primary:active { transform: none; }
.btn-primary.full { width: 100%; margin-top: 8px; }
.btn-primary.sm { padding: 7px 14px; font-size: .85rem; }

.btn-danger {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border-radius: var(--r-sm); border: none; cursor: pointer;
  background: var(--danger-bg); color: var(--danger);
  font-family: var(--font); font-size: .85rem; font-weight: 700;
  transition: background .2s;
}
.btn-danger:hover { background: var(--danger); color: white; }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border-radius: var(--r-sm);
  border: 1px solid var(--border-light); cursor: pointer;
  background: transparent; color: var(--text-muted);
  font-family: var(--font); font-size: .85rem; font-weight: 600;
  transition: all .2s;
}
.btn-ghost:hover { background: var(--bg-hover); color: var(--text); border-color: var(--border-light); }

.btn-link {
  background: none; border: none; cursor: pointer;
  color: var(--accent-2); font-size: .85rem; font-weight: 600;
  padding: 2px 4px; transition: color .2s;
}
.btn-link:hover { color: var(--accent); }

.user-greeting {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: 10px 14px; margin-bottom: 16px;
}
.avatar-sm {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem; font-weight: 800; flex-shrink: 0;
  background: var(--accent-glow); color: var(--accent-2);
}
#login-hello { font-weight: 700; flex: 1; }

.alert-error {
  background: var(--danger-bg); border: 1px solid rgba(239,68,68,.3);
  border-radius: var(--r-sm); color: var(--danger);
  padding: 10px 14px; font-size: .875rem; font-weight: 600; margin-top: 12px;
}

/* ══════════════════════════════════════════
   DASHBOARD LAYOUT
══════════════════════════════════════════ */
#view-dashboard { flex-direction: row; min-height: 100vh; }

/* ── SIDEBAR ── */
.sidebar {
  width: 240px; flex-shrink: 0;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  height: 100vh; position: sticky; top: 0;
  transition: transform .3s;
}
.sidebar-top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 18px; border-bottom: 1px solid var(--border);
}
.app-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1rem; }
.sidebar-close { display: none; background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.1rem; }

.user-panel {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 18px; border-bottom: 1px solid var(--border);
}
.avatar-lg {
  width: 40px; height: 40px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 800;
  background: var(--accent-glow); color: var(--accent-2);
  border: 2px solid var(--accent);
}
.user-name { font-weight: 800; font-size: .95rem; }
.user-role {
  font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .5px;
  margin-top: 2px; padding: 2px 7px; border-radius: 20px; display: inline-block;
}
.user-role.admin { background: var(--accent-glow); color: var(--accent-2); }
.user-role.user  { background: var(--bg-hover); color: var(--text-muted); }

/* Navigation */
.sidebar-nav { flex: 1; overflow-y: auto; padding: 8px; }

.nav-section-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: var(--r-sm); cursor: pointer;
  font-size: .85rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
  transition: background .2s, color .2s; margin-bottom: 2px;
}
.nav-section-header:hover { background: var(--bg-hover); color: var(--text); }
.nav-section-header .chevron { margin-left: auto; transition: transform .2s; font-size: .7rem; }
.nav-section-header.open .chevron { transform: rotate(0deg); }
.nav-section-header:not(.open) .chevron { transform: rotate(-90deg); }

.nav-section-items { padding-left: 12px; margin-bottom: 8px; }

.nav-item {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 7px 10px; border-radius: var(--r-sm);
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-family: var(--font); font-size: .9rem; font-weight: 600;
  text-align: left; transition: background .15s, color .15s;
}
.nav-item:hover { background: var(--bg-hover); color: var(--text); }
.nav-item.active {
  color: var(--text); font-weight: 700;
}
.nav-item.active.personal-item {
  background: var(--personal-bg); color: var(--personal-2);
}
.nav-item.active.work-item {
  background: var(--work-bg); color: var(--work-2);
}

.nav-folder-icon { font-size: 1rem; }
.nav-divider { height: 1px; background: var(--border); margin: 8px 0; }

.sidebar-footer { padding: 12px 8px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 4px; }
.btn-settings, .btn-logout {
  width: 100%; padding: 8px 12px; border-radius: var(--r-sm);
  background: none; border: none; cursor: pointer;
  font-family: var(--font); font-size: .875rem; font-weight: 700;
  text-align: left; transition: background .15s;
}
.btn-settings { color: var(--text-muted); }
.btn-settings:hover { background: var(--bg-hover); color: var(--text); }
.btn-logout { color: var(--danger); }
.btn-logout:hover { background: var(--danger-bg); }

/* ── MAIN WRAP ── */
.main-wrap { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 24px; background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 1.2rem; padding: 4px;
}
.breadcrumb {
  flex: 1; font-size: .9rem; font-weight: 600; color: var(--text-muted);
}
.breadcrumb .bc-sep { color: var(--text-dim); margin: 0 6px; }
.breadcrumb .bc-active { color: var(--text); }
.topbar-actions { display: flex; gap: 8px; align-items: center; }
.btn-upload {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--r-sm); border: none; cursor: pointer;
  background: var(--accent); color: white;
  font-family: var(--font); font-size: .875rem; font-weight: 700;
  transition: filter .2s, transform .15s;
}
.btn-upload:hover { filter: brightness(1.1); transform: translateY(-1px); }

/* Content area */
.content-area { flex: 1; padding: 24px; }

.center-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 360px; gap: 12px; color: var(--text-muted);
}
.welcome-icon { font-size: 4rem; }
.center-state h2, .center-state h3 { color: var(--text); font-size: 1.4rem; }
.center-state p { font-size: .9rem; }

/* Upload drop zone */
.upload-drop-zone {
  display: none;
  border: 2px dashed var(--border-light); border-radius: var(--r-lg);
  padding: 20px; text-align: center; margin-bottom: 16px;
  color: var(--text-muted); font-size: .9rem; transition: all .2s;
}
.upload-drop-zone.drag-over {
  display: block; border-color: var(--accent); background: var(--accent-glow);
  color: var(--text);
}
.upload-drop-zone.show { display: block; }
.drop-hint { pointer-events: none; }

/* Files grid */
.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

.file-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px 14px;
  cursor: default;
  transition: border-color .2s, transform .15s, box-shadow .2s;
  display: flex; flex-direction: column; gap: 8px; position: relative;
  overflow: hidden;
}
.file-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.file-type-icon { font-size: 2.2rem; line-height: 1; }
.file-name {
  font-size: .85rem; font-weight: 700; word-break: break-all;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.file-meta { font-size: .75rem; color: var(--text-muted); }
.file-actions { display: flex; gap: 6px; margin-top: 4px; flex-wrap: wrap; }
.file-actions .btn-dl, .file-actions .btn-rm {
  flex: 1; padding: 5px; border-radius: 6px; border: none; cursor: pointer;
  font-size: .78rem; font-weight: 700; font-family: var(--font);
  transition: all .15s;
}
.btn-dl { background: var(--bg-hover); color: var(--text-muted); }
.btn-dl:hover { background: var(--accent); color: white; }
.btn-rm { background: var(--bg-hover); color: var(--text-muted); }
.btn-rm:hover { background: var(--danger); color: white; }

/* Upload progress overlay */
.upload-progress {
  position: fixed; bottom: 24px; right: 24px; z-index: 100;
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--r); padding: 16px 20px; min-width: 280px;
  box-shadow: var(--shadow-lg);
}
.upload-progress h4 { font-size: .9rem; margin-bottom: 10px; }
.progress-bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width .3s; }

/* ══════════════════════════════════════════
   ADMIN PANEL
══════════════════════════════════════════ */
#view-admin { flex-direction: column; background: var(--bg); }

.admin-layout { max-width: 1100px; margin: 0 auto; width: 100%; padding: 24px; }

.admin-header {
  display: flex; align-items: center; gap: 16px; margin-bottom: 24px;
}
.admin-header h2 { flex: 1; font-size: 1.4rem; font-weight: 900; }
.btn-back {
  background: none; border: 1px solid var(--border-light);
  border-radius: var(--r-sm); padding: 8px 14px; cursor: pointer;
  color: var(--text-muted); font-family: var(--font); font-weight: 700; font-size: .875rem;
  transition: all .2s;
}
.btn-back:hover { background: var(--bg-hover); color: var(--text); }

.admin-tabs { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
.tab-btn {
  padding: 10px 20px; background: none; border: none; border-bottom: 2px solid transparent;
  cursor: pointer; font-family: var(--font); font-size: .9rem; font-weight: 700;
  color: var(--text-muted); margin-bottom: -1px; transition: all .2s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent-2); border-bottom-color: var(--accent); }

.tab-content { display: none; }
.tab-content.active { display: block !important; }

/* Users table */
.users-table-wrap { overflow-x: auto; border-radius: var(--r); border: 1px solid var(--border); }
.users-table { width: 100%; border-collapse: collapse; }
.users-table th {
  background: var(--bg-2); padding: 11px 14px;
  text-align: left; font-size: .78rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.users-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: .875rem; }
.users-table tr:last-child td { border-bottom: none; }
.users-table tr:hover td { background: var(--bg-hover); }

.badge {
  display: inline-block; padding: 3px 8px; border-radius: 20px;
  font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .4px;
}
.badge-admin  { background: var(--accent-glow); color: var(--accent-2); }
.badge-user   { background: var(--bg-hover); color: var(--text-muted); }
.badge-active { background: rgba(34,197,94,.12); color: var(--success); }
.badge-inactive { background: var(--danger-bg); color: var(--danger); }

.action-btns { display: flex; gap: 6px; }

/* Permissions matrix */
.perms-header { margin-bottom: 20px; }
.perms-header select { max-width: 300px; }

.perms-section { margin-bottom: 24px; }
.perms-section-title {
  font-size: .85rem; font-weight: 800; text-transform: uppercase; letter-spacing: .5px;
  margin-bottom: 10px; padding: 6px 12px; border-radius: var(--r-sm);
}
.perms-section-title.personal { background: var(--personal-bg); color: var(--personal-2); }
.perms-section-title.work     { background: var(--work-bg); color: var(--work-2); }

.perms-table { width: 100%; border-collapse: collapse; border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.perms-table th { background: var(--bg-2); padding: 9px 12px; text-align: center; font-size: .78rem; font-weight: 800; color: var(--text-muted); text-transform: uppercase; letter-spacing: .4px; }
.perms-table th:first-child { text-align: left; }
.perms-table td { padding: 10px 12px; border-top: 1px solid var(--border); text-align: center; }
.perms-table td:first-child { text-align: left; font-weight: 700; }
.perms-table tr:hover td { background: var(--bg-hover); }

/* Custom checkbox */
.perm-check { width: 18px; height: 18px; cursor: pointer; accent-color: var(--accent); }

/* ══════════════════════════════════════════
   MODAL
══════════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.7); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--r-lg); width: min(480px, 100%);
  box-shadow: var(--shadow-lg); animation: modalIn .2s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(.95) translateY(10px); }
  to   { opacity: 1; transform: none; }
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1.1rem; font-weight: 800; }
.modal-close {
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 1rem; padding: 4px 8px;
  border-radius: var(--r-sm); transition: background .2s;
}
.modal-close:hover { background: var(--bg-hover); color: var(--text); }
.modal-body { padding: 24px; }
.modal-body .field:last-of-type { margin-bottom: 0; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

/* Temp password display */
.temp-pass-box {
  background: var(--bg-2); border: 1.5px dashed var(--warning);
  border-radius: var(--r-sm); padding: 14px 16px; margin-top: 12px;
}
.temp-pass-box p { font-size: .8rem; color: var(--text-muted); margin-bottom: 4px; }
.temp-pass-box .pass-val { font-size: 1.1rem; font-weight: 900; color: var(--warning); font-family: monospace; letter-spacing: 1px; }
.temp-pass-box .warn { font-size: .8rem; color: var(--text-muted); margin-top: 6px; }

/* ══════════════════════════════════════════
   TOAST NOTIFICATIONS
══════════════════════════════════════════ */
#toast-container {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  z-index: 300; display: flex; flex-direction: column; gap: 8px; pointer-events: none;
}
.toast {
  padding: 12px 20px; border-radius: var(--r-sm);
  font-size: .875rem; font-weight: 700; box-shadow: var(--shadow);
  animation: toastIn .3s ease; pointer-events: auto;
  white-space: nowrap;
}
.toast.success { background: #14532d; color: #86efac; border: 1px solid #16a34a; }
.toast.error   { background: #450a0a; color: #fca5a5; border: 1px solid var(--danger); }
.toast.info    { background: #1e1b4b; color: var(--accent-2); border: 1px solid var(--accent); }
.toast.out     { animation: toastOut .3s ease forwards; }
@keyframes toastIn  { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes toastOut { from { opacity: 1; transform: none; } to { opacity: 0; transform: translateY(12px); } }

/* ══════════════════════════════════════════
   SPINNER
══════════════════════════════════════════ */
.spinner {
  width: 36px; height: 36px; border-radius: 50%;
  border: 3px solid var(--border-light); border-top-color: var(--accent);
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ══════════════════════════════════════════
   UTILS
══════════════════════════════════════════ */
.hidden { display: none !important; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: .85rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-8 { gap: 8px; }

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed; left: 0; top: 0; z-index: 50; height: 100vh;
    transform: translateX(-100%);
  }
  .sidebar.open { transform: none; }
  .sidebar-close { display: block; }
  .hamburger { display: block; }
  .files-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .admin-layout { padding: 16px; }
  .admin-header { flex-wrap: wrap; }
  .login-card { padding: 32px 24px; }
}