/* ============================================================
   Aidesk — modern app shell
   Design language: clean sans, generous whitespace, soft shadows,
   subtle gradients, gradient brand mark. Light + dark.
============================================================ */

:root {
  --bg:        #FAFAFB;
  --bg-soft:   #F4F5F7;
  --surface:   #FFFFFF;
  --surface-2: #F9FAFB;
  --text:      #0F172A;
  --text-mid:  #334155;
  --text-soft: #64748B;
  --text-muted:#94A3B8;
  --border:    #E5E7EB;
  --border-strong:#D1D5DB;

  --brand:        #6366F1;
  --brand-hover:  #4F46E5;
  --brand-soft:   #EEF2FF;
  --brand-ring:   rgba(99,102,241,.18);
  --accent:       #06B6D4;
  --accent-soft:  #ECFEFF;

  --success:#10B981; --success-soft:#D1FAE5;
  --warning:#F59E0B; --warning-soft:#FEF3C7;
  --danger: #EF4444; --danger-soft: #FEE2E2;

  --gradient: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #06B6D4 100%);
  --gradient-soft: linear-gradient(135deg, rgba(99,102,241,.10) 0%, rgba(139,92,246,.08) 50%, rgba(6,182,212,.08) 100%);

  --radius-xs:  6px;
  --radius-sm:  8px;
  --radius:     12px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --shadow-xs:  0 1px 2px rgba(15,23,42,.04);
  --shadow-sm:  0 2px 4px rgba(15,23,42,.05), 0 1px 2px rgba(15,23,42,.03);
  --shadow:     0 4px 12px rgba(15,23,42,.06), 0 2px 4px rgba(15,23,42,.04);
  --shadow-lg:  0 16px 40px rgba(15,23,42,.10), 0 4px 12px rgba(15,23,42,.06);
  --shadow-brand:0 12px 24px rgba(99,102,241,.20);

  --sidebar-w: 248px;
  --topbar-h:  64px;

  color-scheme: light;
}

html[data-theme="dark"] {
  --bg:        #0B0F19;
  --bg-soft:   #0F1422;
  --surface:   #141A2A;
  --surface-2: #1A2236;
  --text:      #F1F5F9;
  --text-mid:  #CBD5E1;
  --text-soft: #94A3B8;
  --text-muted:#64748B;
  --border:    #1F2937;
  --border-strong:#334155;

  --brand-soft:   rgba(99,102,241,.16);
  --accent-soft:  rgba(6,182,212,.12);
  --success-soft: rgba(16,185,129,.16);
  --warning-soft: rgba(245,158,11,.16);
  --danger-soft:  rgba(239,68,68,.16);

  --gradient-soft: linear-gradient(135deg, rgba(99,102,241,.18) 0%, rgba(139,92,246,.16) 50%, rgba(6,182,212,.16) 100%);

  --shadow-xs:  0 1px 2px rgba(0,0,0,.30);
  --shadow-sm:  0 2px 4px rgba(0,0,0,.30), 0 1px 2px rgba(0,0,0,.20);
  --shadow:     0 4px 14px rgba(0,0,0,.35);
  --shadow-lg:  0 24px 48px rgba(0,0,0,.45);
  --shadow-brand:0 12px 32px rgba(99,102,241,.30);

  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-feature-settings: 'cv02','cv03','cv04','cv11';
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-hover); }
button { font-family: inherit; }
hr { border: 0; border-top: 1px solid var(--border); margin: 24px 0; }

/* ============== AUTH / split layouts ============== */
.auth-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(0,1fr);
  background: var(--bg);
}
.auth-hero {
  position: relative;
  overflow: hidden;
  background: var(--gradient);
  color: #fff;
  padding: 56px 48px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.auth-hero::before, .auth-hero::after {
  content:""; position:absolute; border-radius:50%;
  background: rgba(255,255,255,.10); filter: blur(60px);
}
.auth-hero::before { width: 360px; height: 360px; top: -80px; right: -80px; }
.auth-hero::after  { width: 280px; height: 280px; bottom: -60px; left: -60px; background: rgba(6,182,212,.30); }
.auth-hero-inner { position: relative; z-index: 1; }
.auth-hero h1 { font-size: 40px; font-weight: 700; line-height: 1.1; letter-spacing: -0.02em; margin: 24px 0 12px; }
.auth-hero p  { font-size: 17px; opacity: .92; max-width: 460px; margin: 0; }
.auth-hero-foot { position: relative; z-index: 1; font-size: 13px; opacity: .8; }
.auth-form-side {
  display: flex; align-items: center; justify-content: center; padding: 48px;
}
.auth-card {
  width: 100%; max-width: 420px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 40px 36px; box-shadow: var(--shadow-lg);
}
.auth-card h2 { margin: 4px 0 6px; font-size: 26px; font-weight: 700; letter-spacing: -0.01em; }
.auth-card .auth-sub { color: var(--text-soft); margin: 0 0 28px; font-size: 14px; }

@media (max-width: 900px) {
  .auth-page { grid-template-columns: 1fr; }
  .auth-hero { padding: 36px 28px; min-height: 200px; }
  .auth-hero h1 { font-size: 28px; }
  .auth-form-side { padding: 28px 20px; }
  .auth-card { padding: 28px 22px; }
}

/* ============== Forms ============== */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field-label {
  font-size: 12px; font-weight: 600; color: var(--text-mid);
  letter-spacing: .02em;
}
.input, .select, .textarea {
  width: 100%; padding: 11px 14px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14.5px; font-family: inherit; line-height: 1.4;
  transition: border-color .15s, box-shadow .15s, background .15s;
  outline: none;
}
.input::placeholder, .textarea::placeholder { color: var(--text-muted); }
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-ring);
}
.input.code-input { letter-spacing: .42em; text-align: center; font-size: 24px; font-weight: 600; padding: 14px; }
.textarea { min-height: 96px; resize: vertical; }
.field-hint  { font-size: 12.5px; color: var(--text-soft); }
.field-error { font-size: 13px; color: var(--danger); min-height: 18px; }

.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-mid); }
.checkbox-row input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--brand); }

/* ============== Buttons ============== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: var(--radius);
  font-family: inherit; font-size: 14px; font-weight: 600; line-height: 1;
  cursor: pointer; border: 1px solid transparent; background: transparent; color: var(--text);
  transition: transform .12s, box-shadow .15s, background .15s, border-color .15s, color .15s;
  white-space: nowrap;
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--brand-ring); }

.btn-primary { background: var(--brand); color: #fff; box-shadow: var(--shadow-brand); }
.btn-primary:hover { background: var(--brand-hover); transform: translateY(-1px); }

.btn-gradient { background: var(--gradient); color: #fff; box-shadow: var(--shadow-brand); }
.btn-gradient:hover { transform: translateY(-1px); filter: brightness(1.05); }

.btn-secondary {
  background: var(--surface); color: var(--text);
  border-color: var(--border-strong);
}
.btn-secondary:hover { background: var(--surface-2); border-color: var(--brand); color: var(--brand); }

.btn-ghost { background: transparent; color: var(--text-mid); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #DC2626; }

.btn-sm { padding: 8px 12px; font-size: 13px; }
.btn-lg { padding: 14px 22px; font-size: 15px; }
.btn-block { width: 100%; }

/* ============== App layout ============== */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w); flex: 0 0 var(--sidebar-w);
  background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; z-index: 40;
}
.sidebar-head { padding: 22px 20px 16px; border-bottom: 1px solid var(--border); }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px; color: var(--text);
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--gradient); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 16px; box-shadow: var(--shadow-brand);
}
.brand-sub { font-size: 11px; color: var(--text-muted); letter-spacing: .12em; text-transform: uppercase; margin-top: 2px; font-weight: 500; }

.sidebar-nav { flex: 1; padding: 14px 12px; display: flex; flex-direction: column; gap: 2px; overflow-y: auto; }
.nav-section { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; padding: 14px 12px 6px; }
.nav-link {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: var(--radius);
  font-size: 14px; color: var(--text-mid); font-weight: 500;
  transition: background .12s, color .12s;
  position: relative;
}
.nav-link:hover { background: var(--surface-2); color: var(--text); }
.nav-link.active { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.nav-link.active::before {
  content:""; position: absolute; left: -12px; top: 8px; bottom: 8px; width: 3px;
  background: var(--brand); border-radius: 0 3px 3px 0;
}
.nav-link .icon { width: 18px; height: 18px; flex-shrink: 0; }
.nav-link .badge {
  margin-left: auto; background: var(--brand); color: #fff;
  font-size: 10.5px; font-weight: 700; padding: 2px 7px; border-radius: 999px;
}

.sidebar-foot { padding: 14px 12px 18px; border-top: 1px solid var(--border); }
.user-chip {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--radius);
}
.avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--gradient); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; flex-shrink: 0;
}
.user-chip .who { display: flex; flex-direction: column; min-width: 0; }
.user-chip .name { font-size: 13.5px; font-weight: 600; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-chip .role { font-size: 11.5px; color: var(--text-soft); }

/* ============== Main column ============== */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 28px; gap: 16px;
  background: rgba(255,255,255,.78); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 30;
}
html[data-theme="dark"] .topbar { background: rgba(20,26,42,.78); }
.topbar-title { font-size: 20px; font-weight: 700; letter-spacing: -0.01em; color: var(--text); }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.topbar-actions .live-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: var(--success-soft); color: var(--success);
  font-size: 12px; font-weight: 600;
}
.live-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--success);
  box-shadow: 0 0 0 4px rgba(16,185,129,.15);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1);} 50%{opacity:.5;transform:scale(1.5);} }

.theme-toggle {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text-mid); transition: background .15s, color .15s;
}
.theme-toggle:hover { background: var(--surface-2); color: var(--text); }

.content { padding: 28px; flex: 1; }
.page-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.page-title { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin: 0; }
.page-sub   { color: var(--text-soft); margin: 4px 0 0; font-size: 14.5px; }

/* ============== Cards ============== */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px;
  box-shadow: var(--shadow-sm);
}
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: -4px 0 18px; }
.card-title  { font-size: 16px; font-weight: 700; margin: 0; letter-spacing: -0.01em; }
.card-sub    { font-size: 13px; color: var(--text-soft); margin: 2px 0 0; }
.card-divider{ height: 1px; background: var(--border); margin: 16px -22px; }

.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; margin-bottom: 24px; }
@media (max-width: 1100px) { .stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 540px)  { .stats-grid { grid-template-columns: 1fr; } }
.stat-card .stat-icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--brand-soft); color: var(--brand);
  margin-bottom: 12px;
}
.stat-card .stat-icon.is-accent  { background: var(--accent-soft);  color: var(--accent); }
.stat-card .stat-icon.is-success { background: var(--success-soft); color: var(--success); }
.stat-card .stat-icon.is-warning { background: var(--warning-soft); color: var(--warning); }
.stat-label { font-size: 12px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--text-soft); }
.stat-value { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; margin-top: 4px; color: var(--text); }
.stat-sub   { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ============== Tables ============== */
.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
table.tbl { width: 100%; border-collapse: collapse; }
.tbl th, .tbl td { padding: 12px 16px; text-align: left; font-size: 14px; }
.tbl thead th {
  background: var(--surface-2); font-weight: 600; color: var(--text-mid);
  font-size: 12px; letter-spacing: .04em; text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}
.tbl tbody tr { border-top: 1px solid var(--border); }
.tbl tbody tr:hover { background: var(--surface-2); }
.tbl .row-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* ============== Badges / pills ============== */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; line-height: 1.5;
}
.badge-brand   { background: var(--brand-soft);   color: var(--brand); }
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-danger  { background: var(--danger-soft);  color: var(--danger); }
.badge-muted   { background: var(--surface-2);    color: var(--text-soft); border: 1px solid var(--border); }

/* ============== Alerts ============== */
.alert {
  border-radius: var(--radius); padding: 12px 16px;
  font-size: 14px; display: flex; gap: 10px; align-items: flex-start;
  border: 1px solid transparent; margin-bottom: 16px;
}
.alert-error   { background: var(--danger-soft);  color: var(--danger);  border-color: rgba(239,68,68,.20); }
.alert-success { background: var(--success-soft); color: var(--success); border-color: rgba(16,185,129,.20); }
.alert-info    { background: var(--brand-soft);   color: var(--brand);   border-color: rgba(99,102,241,.20); }

/* ============== Tabs ============== */
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 22px; }
.tab  {
  padding: 10px 16px; font-size: 14px; font-weight: 600; color: var(--text-soft);
  cursor: pointer; border-bottom: 2px solid transparent; transition: color .15s, border-color .15s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--brand); border-bottom-color: var(--brand); }

/* ============== Grid utility ============== */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
@media (max-width: 800px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }
.stack { display: flex; flex-direction: column; gap: 12px; }
.row   { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row > .grow { flex: 1; min-width: 0; }
.muted { color: var(--text-soft); }

/* ============== Empty state ============== */
.empty { text-align: center; padding: 48px 24px; color: var(--text-soft); }
.empty .empty-icon { width: 56px; height: 56px; border-radius: 14px; background: var(--surface-2); display: inline-flex; align-items: center; justify-content: center; color: var(--text-muted); margin-bottom: 16px; }
.empty h3 { color: var(--text); font-size: 18px; margin: 0 0 6px; }

/* ============== Mobile sidebar ============== */
.hamburger { display: none; }
@media (max-width: 860px) {
  .sidebar { position: fixed; left: 0; top: 0; transform: translateX(-100%); transition: transform .25s ease; box-shadow: var(--shadow-lg); }
  .sidebar.is-open { transform: translateX(0); }
  .main { width: 100%; }
  .hamburger {
    display: inline-flex; width: 38px; height: 38px; border-radius: 10px;
    background: var(--surface); border: 1px solid var(--border);
    align-items: center; justify-content: center; cursor: pointer; color: var(--text-mid);
  }
  .scrim { position: fixed; inset: 0; background: rgba(0,0,0,.40); z-index: 39; display: none; }
  .scrim.is-open { display: block; }
  .topbar { padding: 0 16px; }
  .content { padding: 20px 16px; }
}

/* ============== Footer ============== */
.app-footer {
  padding: 16px 28px; border-top: 1px solid var(--border);
  font-size: 12px; color: var(--text-muted); display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
@media (max-width: 600px) { .app-footer { padding: 12px 16px; } }