/* ============================================================
   ConTuk — Estilos principales
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
  --c-bg:        #030712;
  --c-surface:   #0f172a;
  --c-card:      #1e293b;
  --c-border:    #334155;
  --c-text:      #f1f5f9;
  --c-muted:     #94a3b8;
  --c-accent:    #6366f1;
  --c-accent-h:  #4f46e5;
  --c-green:     #10b981;
  --c-red:       #ef4444;
  --c-yellow:    #f59e0b;
  --c-blue:      #3b82f6;
  --c-purple:    #8b5cf6;
  --font:        'Inter', system-ui, sans-serif;
}

html.light {
  --c-bg:      #f8fafc;
  --c-surface: #ffffff;
  --c-card:    #ffffff;
  --c-border:  #e2e8f0;
  --c-text:    #0f172a;
  --c-muted:   #64748b;
}

body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.5;
}

.font-inter { font-family: var(--font); }

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  background: var(--c-surface);
  border-right: 1px solid var(--c-border);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  color: var(--c-muted);
  text-decoration: none;
  transition: all 0.15s ease;
}
.nav-item:hover {
  background: rgba(99,102,241,.12);
  color: var(--c-text);
}
.nav-item.nav-active {
  background: rgba(99,102,241,.15);
  color: #a5b4fc;
  font-weight: 500;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 0.75rem;
  padding: 1.25rem;
}

.card-sm { padding: 1rem; }

.stat-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.2;
}

.stat-change {
  font-size: 0.8125rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.stat-change.up   { color: var(--c-green); }
.stat-change.down { color: var(--c-red); }

/* ============================================================
   Formularios
   ============================================================ */
.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--c-muted);
  margin-bottom: 0.375rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 0.5rem;
  padding: 0.5625rem 0.875rem;
  font-size: 0.875rem;
  color: var(--c-text);
  font-family: var(--font);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.form-input::placeholder { color: #475569; }
.form-select option { background: var(--c-surface); }

/* ============================================================
   Botones
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5625rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.15s ease;
  text-decoration: none;
  font-family: var(--font);
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--c-accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: var(--c-accent-h); }

.btn-secondary {
  background: rgba(255,255,255,.07);
  color: var(--c-text);
  border: 1px solid var(--c-border);
}
.btn-secondary:hover:not(:disabled) { background: rgba(255,255,255,.12); }

.btn-danger {
  background: rgba(239,68,68,.15);
  color: #fca5a5;
  border: 1px solid rgba(239,68,68,.3);
}
.btn-danger:hover:not(:disabled) { background: rgba(239,68,68,.25); }

.btn-success {
  background: rgba(16,185,129,.15);
  color: #6ee7b7;
  border: 1px solid rgba(16,185,129,.3);
}
.btn-success:hover:not(:disabled) { background: rgba(16,185,129,.25); }

.btn-sm { padding: 0.375rem 0.625rem; font-size: 0.8125rem; }
.btn-lg { padding: 0.75rem 1.375rem; font-size: 1rem; }

/* ============================================================
   Tabla
   ============================================================ */
.table-wrap {
  overflow-x: auto;
  border-radius: 0.75rem;
  border: 1px solid var(--c-border);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
table.data-table thead tr {
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--c-border);
}
table.data-table thead th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
table.data-table tbody tr {
  border-bottom: 1px solid rgba(255,255,255,.04);
  transition: background 0.12s;
}
table.data-table tbody tr:last-child { border-bottom: none; }
table.data-table tbody tr:hover { background: rgba(255,255,255,.03); }
table.data-table td {
  padding: 0.75rem 1rem;
  color: var(--c-text);
  vertical-align: middle;
}
table.data-table td.muted { color: var(--c-muted); }
table.data-table td.mono  { font-variant-numeric: tabular-nums; }

/* ============================================================
   Badges / Pills
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}
.badge-green  { background: rgba(16,185,129,.15); color: #6ee7b7; }
.badge-red    { background: rgba(239,68,68,.15);  color: #fca5a5; }
.badge-yellow { background: rgba(245,158,11,.15); color: #fde68a; }
.badge-blue   { background: rgba(59,130,246,.15); color: #93c5fd; }
.badge-gray   { background: rgba(107,114,128,.15);color: #d1d5db; }
.badge-purple { background: rgba(139,92,246,.15); color: #c4b5fd; }

/* ============================================================
   Modal
   ============================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 1rem;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 60px rgba(0,0,0,.5);
}
.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h3 { font-size: 1rem; font-weight: 600; }
.modal-body   { padding: 1.5rem; }
.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--c-border);
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* ============================================================
   Alertas
   ============================================================ */
.alert {
  display: flex;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: 0.625rem;
  font-size: 0.875rem;
  border: 1px solid;
}
.alert-info    { background: rgba(59,130,246,.1);  color: #93c5fd; border-color: rgba(59,130,246,.25); }
.alert-success { background: rgba(16,185,129,.1);  color: #6ee7b7; border-color: rgba(16,185,129,.25); }
.alert-warning { background: rgba(245,158,11,.1);  color: #fde68a; border-color: rgba(245,158,11,.25); }
.alert-danger  { background: rgba(239,68,68,.1);   color: #fca5a5; border-color: rgba(239,68,68,.25); }

/* ============================================================
   Utilidades adicionales
   ============================================================ */
.text-income  { color: var(--c-green); }
.text-expense { color: var(--c-red); }
.text-muted   { color: var(--c-muted); }
.text-accent  { color: var(--c-accent); }

.divider { height: 1px; background: var(--c-border); }

.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(255,255,255,.2);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Tabs */
.tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--c-border); margin-bottom: 1.5rem; }
.tab-btn {
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-muted);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all .15s;
  font-family: var(--font);
}
.tab-btn:hover { color: var(--c-text); }
.tab-btn.active {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

/* Tooltip */
[data-tooltip] { position: relative; cursor: help; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  color: var(--c-text);
  padding: 0.375rem 0.625rem;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  white-space: nowrap;
  max-width: 260px;
  white-space: normal;
  text-align: center;
  border: 1px solid var(--c-border);
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s;
  z-index: 50;
}
[data-tooltip]:hover::after { opacity: 1; }

/* Progress bar */
.progress-bar {
  height: 6px;
  background: var(--c-border);
  border-radius: 9999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--c-accent);
  border-radius: 9999px;
  transition: width .5s ease;
}

/* Auth pages */
.auth-bg {
  min-height: 100vh;
  background: radial-gradient(ellipse at 20% 50%, rgba(99,102,241,.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(139,92,246,.06) 0%, transparent 60%),
              var(--c-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.auth-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 1.25rem;
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}

/* Responsive */
@media (max-width: 1023px) {
  .sidebar.open { transform: translateX(0); }
}