/* ==========================================================================
   Sistema de Inventario TI - AMe
   Paleta minimalista basada en blanco + acentos #21314d, #f05c4b, #f0b954
   ========================================================================== */

:root {
  --color-primary:    #21314d;
  --color-primary-2:  #2c4067;
  --color-accent:     #f05c4b;
  --color-warn:       #f0b954;
  --color-bg:         #ffffff;
  --color-bg-alt:     #f7f8fa;
  --color-bg-dim:     #eef0f4;
  --color-border:     #e5e8ee;
  --color-text:       #1f2630;
  --color-text-muted: #6b7280;
  --color-success:    #2f9e6f;
  --color-danger:     #d64535;
  --color-info:       #3b82c4;

  --radius:    8px;
  --radius-sm: 6px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 2px rgba(33,49,77,0.04);
  --shadow:    0 2px 8px rgba(33,49,77,0.06);
  --shadow-lg: 0 8px 24px rgba(33,49,77,0.12);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg-alt);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-2); text-decoration: underline; }

h1, h2, h3, h4 { color: var(--color-primary); margin: 0 0 .5rem; font-weight: 600; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.05rem; }

p { margin: 0 0 .8rem; }

/* ===== Layout principal ================================================== */

.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  padding: 1.2rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.05rem;
  padding: .25rem .25rem 1rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1rem;
}
.sidebar__brand-mark {
  width: 28px; height: 28px;
  border-radius: 7px;
  background: var(--color-primary);
  color: #fff;
  display: grid; place-items: center;
  font-weight: 700; font-size: .8rem;
}

.sidebar__section { margin-top: 1rem; }
.sidebar__section-title {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-text-muted);
  padding: 0 .5rem;
  margin-bottom: .35rem;
}

.sidebar__nav { list-style: none; padding: 0; margin: 0; }
.sidebar__link {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem .75rem;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 2px;
  transition: background .15s ease;
}
.sidebar__link:hover { background: var(--color-bg-dim); text-decoration: none; }
.sidebar__link.is-active {
  background: var(--color-primary);
  color: #fff;
}
.sidebar__link-icon { width: 18px; text-align: center; opacity: .8; }

.main { display: flex; flex-direction: column; min-width: 0; }

.topbar {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: .75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar__title { font-size: 1.05rem; font-weight: 600; color: var(--color-primary); }
.topbar__user { display: flex; align-items: center; gap: .75rem; }
.topbar__user-name { font-weight: 600; }
.topbar__user-role { color: var(--color-text-muted); font-size: .8rem; }
.topbar__avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--color-bg-dim);
  color: var(--color-primary);
  display: grid; place-items: center;
  font-weight: 700;
}

.content { padding: 1.5rem; flex: 1; }

/* ===== Page header ======================================================= */
.page-header {
  display: flex; flex-wrap: wrap;
  align-items: center; justify-content: space-between;
  gap: .75rem;
  margin-bottom: 1.25rem;
}
.page-header h1 { margin: 0; }
.page-header__actions { display: flex; gap: .5rem; }

/* ===== Tarjetas / paneles ================================================ */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card__body { padding: 1.25rem; }
.card__header {
  padding: .9rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600;
  color: var(--color-primary);
}
.card__footer {
  padding: .9rem 1.25rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  border-radius: 0 0 var(--radius) var(--radius);
}

/* ===== KPI cards ========================================================= */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.kpi {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-sm);
}
.kpi__label { color: var(--color-text-muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; }
.kpi__value { color: var(--color-primary); font-size: 1.8rem; font-weight: 700; margin-top: .25rem; }
.kpi__hint  { color: var(--color-text-muted); font-size: .8rem; margin-top: .25rem; }

.kpi--accent .kpi__value { color: var(--color-accent); }
.kpi--warn   .kpi__value { color: var(--color-warn); }

/* ===== Botones =========================================================== */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .55rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-weight: 500;
  cursor: pointer;
  font-size: .9rem;
  transition: background .15s ease, border-color .15s ease, transform .05s;
}
.btn:hover { background: var(--color-bg-alt); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.btn--primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn--primary:hover { background: var(--color-primary-2); border-color: var(--color-primary-2); color: #fff; }

.btn--accent { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn--accent:hover { background: #d94c3c; border-color: #d94c3c; color: #fff; }

.btn--warn { background: var(--color-warn); color: var(--color-primary); border-color: var(--color-warn); }
.btn--warn:hover { background: #e9af46; color: var(--color-primary); }

.btn--ghost { background: transparent; }
.btn--sm { padding: .35rem .65rem; font-size: .82rem; }
.btn--icon { padding: .4rem .55rem; }
.btn--block { width: 100%; justify-content: center; }
.btn--danger { color: var(--color-danger); border-color: rgba(214,69,53,0.3); }
.btn--danger:hover { background: #fff0ee; border-color: var(--color-danger); }

/* ===== Formularios ======================================================== */
.form-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.form-group { display: flex; flex-direction: column; gap: .35rem; }
.form-group--full { grid-column: 1 / -1; }

.form-label {
  font-size: .85rem;
  color: var(--color-primary);
  font-weight: 500;
}
.form-label .req { color: var(--color-accent); margin-left: 2px; }

.form-control,
.form-select,
.form-textarea {
  width: 100%;
  padding: .55rem .7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font: inherit;
  color: var(--color-text);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form-control:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(33,49,77,0.08);
}
.form-textarea { resize: vertical; min-height: 80px; }

.form-help { color: var(--color-text-muted); font-size: .78rem; }
.form-error { color: var(--color-danger); font-size: .8rem; margin-top: 2px; }

.form-actions { display: flex; gap: .5rem; justify-content: flex-end; margin-top: 1rem; }

/* ===== Tablas ============================================================= */
.table-wrap {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: auto;
  box-shadow: var(--shadow-sm);
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.table th, .table td {
  padding: .7rem .9rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.table thead th {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.table tbody tr:hover { background: var(--color-bg-alt); }
.table tbody tr:last-child td { border-bottom: 0; }

.table__actions { display: flex; gap: .25rem; justify-content: flex-end; }

/* ===== Badges ============================================================= */
.badge {
  display: inline-block;
  padding: .2rem .55rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .02em;
  background: var(--color-bg-dim);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.badge--ok      { background: #e7f6ee; color: var(--color-success); border-color: #cdebd9; }
.badge--info    { background: #e8f0f9; color: var(--color-info);    border-color: #cfdef0; }
.badge--warn    { background: #fdf2dc; color: #a06a14;              border-color: #f2dba0; }
.badge--danger  { background: #fdecea; color: var(--color-danger);  border-color: #f5c6c2; }
.badge--muted   { background: var(--color-bg-dim); color: var(--color-text-muted); }
.badge--accent  { background: rgba(240,92,75,0.1); color: var(--color-accent); border-color: rgba(240,92,75,0.25); }

/* ===== Filtros ============================================================ */
.filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: .75rem;
  align-items: end;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

/* ===== Flash mensajes ===================================================== */
.flash-stack { position: fixed; top: 1rem; right: 1rem; display: flex; flex-direction: column; gap: .5rem; z-index: 9999; max-width: 360px; }
.flash {
  padding: .75rem 1rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  background: var(--color-bg);
  border-left: 4px solid var(--color-primary);
  display: flex; align-items: flex-start; gap: .5rem;
  animation: slidein .25s ease;
}
.flash--success { border-color: var(--color-success); }
.flash--error   { border-color: var(--color-danger); }
.flash--warning { border-color: var(--color-warn); }
.flash--info    { border-color: var(--color-info); }
.flash__close { background: none; border: 0; cursor: pointer; color: var(--color-text-muted); font-size: 1.1rem; }
@keyframes slidein { from { opacity: 0; transform: translateX(20px);} to {opacity:1;transform:none} }

/* ===== Login ============================================================== */
.auth {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #fff 0%, #f1f3f7 100%);
}
.auth__card {
  width: 100%;
  max-width: 380px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}
.auth__brand {
  display: flex; align-items: center; gap: .65rem;
  font-weight: 700; color: var(--color-primary);
  font-size: 1.15rem; margin-bottom: 1rem;
}
.auth__brand-mark {
  width: 32px; height: 32px;
  background: var(--color-primary); color: #fff;
  border-radius: 8px;
  display: grid; place-items: center; font-weight: 700;
}
.auth__title { color: var(--color-primary); margin-bottom: .25rem; }
.auth__hint { color: var(--color-text-muted); margin-bottom: 1.25rem; font-size: .85rem; }

/* ===== Tabs ============================================================== */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--color-border); margin-bottom: 1rem; }
.tabs a {
  padding: .55rem 1rem;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  font-weight: 500;
  margin-bottom: -1px;
}
.tabs a:hover { color: var(--color-primary); text-decoration: none; }
.tabs a.is-active { color: var(--color-primary); border-color: var(--color-primary); }

/* ===== Modal ============================================================== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(33,49,77,0.45);
  display: none;
  align-items: center; justify-content: center;
  z-index: 9000;
}
.modal-overlay.is-open { display: flex; }
.modal {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  width: 96%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.modal__header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--color-border); font-weight: 600; color: var(--color-primary); }
.modal__body { padding: 1.25rem; }
.modal__footer { padding: 1rem 1.25rem; border-top: 1px solid var(--color-border); display: flex; gap: .5rem; justify-content: flex-end; background: var(--color-bg-alt); }

/* ===== Misc =============================================================== */
.muted { color: var(--color-text-muted); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-1 { margin-top: .5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: .5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; }
.row { display: flex; gap: 1rem; flex-wrap: wrap; }
.col { flex: 1; min-width: 200px; }

.empty {
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
}
.empty__icon { font-size: 2rem; opacity: .5; margin-bottom: .5rem; }

.divider { height: 1px; background: var(--color-border); margin: 1rem 0; }

@media (max-width: 880px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
}