/* ============================================================
   Dex · Cloud — Sistema de diseño
   Implementación de DESIGN.md. Todos los estilos del proyecto
   viven en este único archivo.
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root {
  --bg:        #f4f6fb;
  --canvas:    #888a8e;
  --surface:   #ffffff;
  --border:    #e2e8f0;
  --primary:   #006DD9;
  --primary-h: #0060BF;
  --danger:    #ef4444;
  --success:   #22c55e;
  --warn:      #f59e0b;
  --info:      #3b82f6;
  --purple:    #8b5cf6;
  --text:      #1e293b;
  --muted:     #64748b;
  --radius:    10px;
  --shadow:    0 1px 4px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
  --row-hover: #f1f5f9;
}

[data-theme="dark"] {
  --bg:        #32373D;
  --canvas:    #2b2c2f;
  --surface:   #3d4248;
  --border:    #555b63;
  --primary:   #006DD9;
  --primary-h: #0060BF;
  --danger:    #ef4444;
  --success:   #22c55e;
  --warn:      #f59e0b;
  --text:      #f0f0f0;
  --muted:     #aaaaaa;
  --shadow:    0 1px 4px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.6);
  --row-hover: #4a5058;
}

/* ---------- 2. Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg); color: var(--text); min-height: 100vh;
}

/* ---------- 3. Layout principal ---------- */
.layout  { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--surface);
           border-right: 1px solid var(--border);
           display: flex; flex-direction: column; flex-shrink: 0; }
.main    { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar  { background: var(--surface); border-bottom: 1px solid var(--border);
           padding: 0 24px; height: 60px;
           display: flex; align-items: center; justify-content: space-between;
           box-shadow: var(--shadow); }
.content { flex: 1; padding: 24px; overflow-y: auto; background: var(--canvas); }

/* ---------- 4. Sidebar ---------- */
.sidebar-logo  { padding: 20px 20px 16px; border-bottom: 1px solid var(--border);
                 display: flex; align-items: center; gap: 8px; }
.sidebar-nav   { padding: 0 0 12px; flex: 1; }
.sidebar-footer{ padding: 10px 20px; font-size: .75rem; color: var(--muted);
                 border-top: 1px solid var(--border); text-align: center;
                 letter-spacing: .03em; font-family: monospace; }

.nav-item { display: flex; align-items: center; gap: 10px;
            padding: 10px 20px; font-size: .9rem; color: var(--muted);
            cursor: pointer; border-left: 3px solid transparent;
            transition: background .15s, color .15s; text-decoration: none; }
.nav-item:hover  { background: rgba(0,109,217,.1); color: var(--primary); }
.nav-item.active { background: var(--primary); color: #fff;
                   border-left-color: var(--primary); font-weight: 600; }
.nav-icon { font-size: 1.1rem; width: 20px; text-align: center; }

.nav-group-wrap .nav-sub      { display: none; background: var(--bg); }
.nav-group-wrap.open .nav-sub { display: block; }
.nav-group-toggle             { justify-content: space-between; }
.nav-group-arrow              { font-size: .75rem; font-weight: 700;
                                margin-left: auto; transition: transform .2s;
                                color: var(--muted); }
.nav-group-wrap.open .nav-group-arrow { transform: rotate(45deg); }
.nav-sub-item                 { padding-left: 34px; background: var(--bg); }

/* ---------- 5. Topbar ---------- */
.topbar-title    { font-size: 1rem; font-weight: 600; flex: 1; }
.topbar-user     { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.topbar-username { background: none; border: none; cursor: pointer;
                   font-size: .85rem; color: var(--muted);
                   display: flex; align-items: center; gap: 4px;
                   padding: 6px 10px; border-radius: 8px; transition: background .15s; }
.topbar-username:hover { background: var(--border); }
.user-dropdown   { display: none; position: absolute; right: 0; top: calc(100% + 6px);
                   background: var(--surface); border: 1px solid var(--border);
                   border-radius: 10px; box-shadow: var(--shadow-lg);
                   min-width: 160px; overflow: hidden; z-index: 200; }
.user-dropdown.open { display: block; }

/* ---------- 6. Botones ---------- */
.btn { padding: 8px 16px; border-radius: var(--radius); border: none;
       font-size: .88rem; font-weight: 600; cursor: pointer;
       display: inline-flex; align-items: center; gap: 6px;
       transition: background .15s, transform .1s; }
.btn:active           { transform: scale(.97); }
.btn:disabled         { opacity: .65; cursor: not-allowed; }
.btn-primary          { background: var(--primary); color: #fff; }
.btn-primary:hover    { background: var(--primary-h); }
.btn-danger           { background: var(--danger); color: #fff; }
.btn-danger:hover     { background: #dc2626; }
.btn-secondary        { background: var(--surface); color: var(--text);
                        border: 1px solid var(--border); }
.btn-secondary:hover  { background: var(--bg); }
.btn-ghost            { background: transparent; color: var(--muted);
                        border: 1px solid var(--border); }
.btn-ghost:hover      { background: var(--bg); color: var(--text); }
.btn-sm               { padding: 5px 12px; font-size: .8rem; }
.btn-icon-sm          { background: none; border: none; cursor: pointer;
                        padding: 4px 8px; border-radius: 6px; font-size: .85rem; }
.btn-icon-sm:hover    { background: var(--bg); }

/* ---------- 7. Inputs ---------- */
input[type=text], input[type=number], input[type=url], input[type=tel],
input[type=email], input[type=date], input[type=time], input[type=datetime-local],
input[type=password], input[type=search], select, textarea {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 12px; font-size: .88rem; background: var(--surface);
  color: var(--text); outline: none; transition: border .15s; font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,109,217,.12);
}
input:disabled, select:disabled, textarea:disabled,
input[readonly], textarea[readonly] {
  color: var(--muted); background: var(--bg); cursor: not-allowed; opacity: .75;
}
textarea { resize: vertical; min-height: 60px; }

.field-error   { margin-top: 4px; font-size: .78rem; color: var(--danger); }
.input-invalid { border-color: var(--danger) !important;
                 box-shadow: 0 0 0 2px rgba(239,68,68,.18); }

/* ---------- 8. Formularios ---------- */
.form-row    { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3  { grid-template-columns: repeat(3, 1fr); }
.form-row-4  { grid-template-columns: repeat(4, 1fr); }
.form-group  { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: .8rem; font-weight: 600; color: var(--muted); }
.form-group input, .form-group select, .form-group textarea { width: 100%; }

/* ---------- 10. Tablas ---------- */
.table-card { background: var(--surface); border: 1px solid var(--border);
              border-radius: var(--radius); box-shadow: var(--shadow);
              overflow-x: auto; overflow-y: hidden; }
table        { width: 100%; border-collapse: collapse; font-size: .88rem; }
thead tr     { background: var(--bg); }
th           { padding: 10px 14px; text-align: left;
               font-size: .75rem; text-transform: uppercase; letter-spacing: .05em;
               color: var(--muted); font-weight: 600;
               border-bottom: 1px solid var(--border); white-space: nowrap; }
td           { padding: 10px 14px; border-bottom: 1px solid var(--border);
               vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--row-hover); }
.actions      { display: flex; gap: 4px; }
.table-empty  { text-align: center; padding: 48px 24px; color: var(--muted); }
.td-img       { width: 44px; height: 44px; object-fit: cover;
                border-radius: 8px; border: 1px solid var(--border); }
.td-nombre    { font-weight: 600; }
.td-id        { color: var(--muted); font-size: .8rem; }

/* ---------- 11. Badges ---------- */
.badge         { display: inline-block; padding: 2px 10px;
                 border-radius: 99px; font-size: .75rem; font-weight: 600; }
.badge-info    { background: #eff6ff; color: #3b82f6; }
.badge-success { background: #dcfce7; color: #16a34a; }
.badge-danger  { background: #fef2f2; color: #dc2626; }
.badge-warn    { background: #fef9c3; color: #a16207; }

/* ---------- 12. Stat cards ---------- */
.stats-bar  { display: flex; gap: 14px; margin-bottom: 20px; flex-wrap: wrap; }
.stat-card  { background: var(--surface); border: 1px solid var(--border);
              border-radius: var(--radius); padding: 14px 20px;
              display: flex; flex-direction: column; gap: 2px;
              flex: 1; min-width: 120px; }
.stat-label { font-size: .75rem; color: var(--muted);
              text-transform: uppercase; letter-spacing: .04em; }
.stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-value.green  { color: var(--success); }
.stat-value.blue   { color: var(--primary); }
.stat-value.red    { color: var(--danger); }

.dash-link { cursor: pointer; transition: opacity .15s; }
.dash-link:hover { opacity: .75; }
.stat-card.dash-link:hover { background: var(--bg); }

/* ---------- 16. Toasts ---------- */
.toast { position: fixed; bottom: 24px; left: 50%;
         transform: translateX(-50%) translateY(16px);
         background: #1e293b; color: #fff;
         padding: 10px 20px; border-radius: 99px;
         font-size: .88rem; opacity: 0; pointer-events: none;
         transition: opacity .2s, transform .2s;
         z-index: 200; white-space: nowrap; }
.toast.show  { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--danger); }

/* ---------- 18. Spinner ---------- */
.spin { display: inline-block; width: 28px; height: 28px;
        border: 3px solid var(--border); border-top-color: var(--primary);
        border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 19. Responsive / mobile ---------- */
.hamburger        { display: none; background: none; border: none; cursor: pointer;
                    font-size: 1.4rem; color: var(--text);
                    padding: 4px 8px; margin-right: 8px; line-height: 1; }
.sidebar-overlay  { display: none; position: fixed; inset: 0;
                    background: rgba(0,0,0,.45); z-index: 199; }
.sidebar-overlay.active { display: block; }

@media (max-width: 768px) {
  .hamburger { display: inline-flex; align-items: center; }
  .sidebar   { position: fixed; top: 0; left: 0; height: 100vh; z-index: 200;
               transform: translateX(-100%); transition: transform .25s; }
  .sidebar.open { transform: translateX(0); }
  .form-row, .form-row-3, .form-row-4 { grid-template-columns: 1fr; }
}