/* ============================================================
   styles.css — Sistema de Inventario Empresarial
   Apple-inspired Design System
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Apple-inspired color palette */
  --primary: #007AFF;
  --primary-hover: #0056CC;
  --primary-light: rgba(0,122,255,.08);
  --success: #34C759;
  --warning: #FF9500;
  --danger: #FF3B30;
  --info: #5AC8FA;
  --purple: #AF52DE;

  /* Neutral tones - warm gray like Apple */
  --gray-50: #FBFBFD;
  --gray-100: #F5F5F7;
  --gray-200: #E8E8ED;
  --gray-300: #D2D2D7;
  --gray-400: #AEAEB2;
  --gray-500: #8E8E93;
  --gray-600: #636366;
  --gray-700: #48484A;
  --gray-800: #2C2C2E;
  --gray-900: #1C1C1E;

  /* Design tokens */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 2px 8px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.06);
  --shadow-xl: 0 24px 60px rgba(0,0,0,.16), 0 8px 20px rgba(0,0,0,.08);

  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', 'Menlo', 'Monaco', monospace;

  --transition: all .2s cubic-bezier(.25,.1,.25,1);
  --transition-spring: all .35s cubic-bezier(.34,1.56,.64,1);
}

body {
  font-family: var(--font);
  background: #F2F2F7;
  background-image: 
    radial-gradient(ellipse at 0% 0%, rgba(0,122,255,.03) 0%, transparent 50%),
    radial-gradient(ellipse at 100% 100%, rgba(175,82,222,.03) 0%, transparent 50%);
  color: var(--gray-900);
  line-height: 1.47;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Login Page --- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(0,122,255,.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(175,82,222,.1) 0%, transparent 40%),
    radial-gradient(ellipse at 50% 80%, rgba(90,200,250,.08) 0%, transparent 40%);
}

.login-container { width: 100%; max-width: 380px; padding: 1.5rem; }

.login-card {
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem 2rem;
  box-shadow: var(--shadow-xl), inset 0 0 0 .5px rgba(255,255,255,.6);
}

.login-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.25rem;
  background: linear-gradient(145deg, var(--primary), var(--purple));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,122,255,.3);
}
.login-logo svg { width: 28px; height: 28px; color: #fff; }

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--gray-900);
  letter-spacing: -.02em;
}

.login-subtitle {
  text-align: center;
  color: var(--gray-500);
  font-size: .875rem;
  margin-bottom: 2rem;
}

.login-error {
  color: var(--danger);
  font-size: .8rem;
  text-align: center;
  margin-top: .75rem;
  padding: .5rem;
  background: rgba(255,59,48,.06);
  border-radius: var(--radius-sm);
}

/* --- Forms --- */
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: .375rem;
  letter-spacing: .01em;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: .625rem .875rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: .875rem;
  font-family: var(--font);
  background: var(--gray-50);
  transition: var(--transition);
  color: var(--gray-900);
}
.form-group input::placeholder { color: var(--gray-400); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(0,122,255,.12);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .6rem 1.125rem;
  border: none;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn:disabled { opacity: .4; cursor: not-allowed; pointer-events: none; }
.btn:active:not(:disabled) { transform: scale(.97); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,122,255,.25);
}
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); box-shadow: 0 4px 12px rgba(0,122,255,.35); }

.btn-secondary {
  background: rgba(0,0,0,.04);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}
.btn-secondary:hover:not(:disabled) { background: rgba(0,0,0,.07); border-color: var(--gray-300); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #E0352C; }

.btn-ghost {
  background: transparent;
  color: var(--primary);
  padding: .5rem .75rem;
}
.btn-ghost:hover { background: var(--primary-light); }

.btn-block { width: 100%; padding: .875rem; font-size: .9375rem; font-weight: 600; }

.btn-icon {
  background: none;
  border: none;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 50%;
  position: relative;
  transition: var(--transition);
  color: var(--gray-700);
}
.btn-icon:hover { background: var(--gray-100); color: var(--primary); }
.btn-icon svg { width: 20px; height: 20px; flex-shrink: 0; }

.btn-link { background: none; color: var(--primary); text-decoration: none; font-weight: 500; font-size: .875rem; }
.btn-link:hover { opacity: .8; }

/* --- Top Bar (Frosted Glass) --- */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .625rem 1.5rem;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border-bottom: 1px solid rgba(0,0,0,.06);
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 56px;
  box-shadow: 0 1px 8px rgba(0,0,0,.04);
}
.top-bar-left, .top-bar-right { display: flex; align-items: center; gap: .75rem; }
.app-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--gray-900);
  white-space: nowrap;
  letter-spacing: -.01em;
}

.search-container { position: relative; }
.search-input {
  padding: .5rem .75rem .5rem 2.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: .8125rem;
  width: 200px;
  background: var(--gray-100);
  font-family: var(--font);
  transition: var(--transition);
  color: var(--gray-800);
}
.search-input::placeholder { color: var(--gray-400); }
.search-input:focus {
  outline: none;
  width: 260px;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(0,122,255,.1), var(--shadow);
}
.search-icon {
  position: absolute;
  left: .75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
}
.search-icon svg { width: 14px; height: 14px; }

/* --- Stats bar --- */
.stats-bar { display: flex; gap: .5rem; }
.stat-item {
  font-size: .75rem;
  color: var(--gray-500);
  font-weight: 500;
  padding: .25rem .625rem;
  border-radius: 999px;
  background: var(--gray-100);
}

/* --- Management bar --- */
.management-bar {
  display: flex;
  gap: .625rem;
  padding: .75rem 1.5rem;
  background: rgba(255,255,255,.7);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,.04);
}

/* --- User menu dropdown --- */
.user-menu { position: relative; }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: .5px solid rgba(0,0,0,.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: .5rem;
  min-width: 200px;
  z-index: 200;
  animation: dropdown-in .2s cubic-bezier(.25,.1,.25,1);
}
@keyframes dropdown-in {
  from { opacity: 0; transform: translateY(-4px) scale(.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.dropdown-menu hr { border: none; border-top: .5px solid var(--gray-200); margin: .375rem .5rem; }
.dropdown-user-name { display: block; font-weight: 600; font-size: .8125rem; padding: .375rem .5rem; }
.dropdown-user-role { display: block; font-size: .6875rem; color: var(--gray-500); padding: 0 .5rem .25rem; text-transform: capitalize; }
.dropdown-menu a, .dropdown-menu button {
  display: flex;
  align-items: center;
  gap: .5rem;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: .5rem .625rem;
  font-size: .8125rem;
  color: var(--gray-700);
  cursor: pointer;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-family: var(--font);
}
.dropdown-menu button:hover, .dropdown-menu a:hover { background: var(--gray-100); color: var(--gray-900); }

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: .2rem .5rem;
  border-radius: 999px;
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .02em;
}
.badge-count {
  position: absolute;
  top: -2px; right: -2px;
  background: var(--danger);
  color: #fff;
  font-size: .6rem;
  min-width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 0 0 2px #fff;
}
.badge-pending { background: rgba(0,122,255,.1); color: var(--primary); }
.badge-warning { background: rgba(255,149,0,.12); color: #C77700; }
.badge-danger { background: rgba(255,59,48,.1); color: var(--danger); }
.badge-success { background: rgba(52,199,89,.1); color: #1B8A37; }
.badge-late { background: rgba(255,149,0,.08); color: #9A6100; }
.badge-default { background: var(--gray-100); color: var(--gray-600); }

/* --- Kanban Board --- */
.board-container {
  display: flex;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  min-height: calc(100vh - 120px);
  align-items: flex-start;
  scroll-behavior: smooth;
}
.board-container::-webkit-scrollbar { height: 6px; }
.board-container::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }

.board-column {
  min-width: 0;
  flex: 1 1 0;
  max-width: 320px;
  flex-shrink: 0;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.9);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 150px);
  transition: var(--transition);
  box-shadow: 0 2px 12px rgba(0,0,0,.04), 0 0 0 1px rgba(0,0,0,.03);
}
.board-column:hover { 
  box-shadow: 0 4px 20px rgba(0,0,0,.07), 0 0 0 1px rgba(0,0,0,.04);
  transform: translateY(-1px);
}

.column-header {
  padding: .875rem 1rem .625rem;
  display: flex;
  align-items: center;
  gap: .625rem;
  font-weight: 600;
  font-size: .8125rem;
  letter-spacing: -.01em;
  position: sticky;
  top: 0;
  border-bottom: 1px solid rgba(0,0,0,.04);
}
.column-header .color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px currentColor;
}
.column-header .column-count {
  margin-left: auto;
  font-size: .6875rem;
  color: var(--gray-400);
  font-weight: 500;
  background: var(--gray-100);
  padding: .125rem .4rem;
  border-radius: 999px;
}

.column-body {
  padding: .375rem .5rem .75rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.column-body::-webkit-scrollbar { width: 4px; }
.column-body::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 2px; }

/* --- Cards --- */
.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 1rem 1rem .875rem;
  box-shadow: 0 2px 8px rgba(0,0,0,.06), 0 0 0 1px rgba(0,0,0,.03);
  cursor: grab;
  transition: var(--transition);
  border: none;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 8px; left: 0;
  width: 4px;
  height: calc(100% - 16px);
  border-radius: 0 4px 4px 0;
  background: var(--card-accent, var(--primary));
}
.card:hover {
  box-shadow: 0 12px 32px rgba(0,0,0,.12), 0 0 0 1px rgba(0,0,0,.04);
  transform: translateY(-3px);
}
.card:active { cursor: grabbing; transform: scale(.97); }
.card.dragging {
  opacity: .5;
  transform: rotate(3deg) scale(1.05);
  box-shadow: var(--shadow-xl);
}
.card-code {
  font-size: .6875rem;
  color: var(--gray-400);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-family: var(--font-mono);
}
.card-name {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: .25rem 0;
  letter-spacing: -.01em;
}
.card-qty {
  font-size: .75rem;
  color: var(--gray-500);
  font-weight: 500;
}
.card-actions {
  display: flex;
  gap: .375rem;
  margin-top: .625rem;
  opacity: 0;
  transition: var(--transition);
}
.card:hover .card-actions { opacity: 1; }
.card-actions button {
  font-size: .6875rem;
  font-weight: 500;
  padding: .3rem .6rem;
  background: var(--primary-light);
  color: var(--primary);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
}
.card-actions button:hover { background: var(--primary); color: #fff; }

/* Drag over state */
.column-body.drag-over {
  background: rgba(0,122,255,.04);
  border: 1.5px dashed rgba(0,122,255,.3);
  border-radius: var(--radius);
}

/* --- Modal (Apple Sheet style) --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.3);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
  animation: overlay-in .2s ease;
}
@keyframes overlay-in { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 900px;
  max-height: 95vh;
  overflow-y: auto;
  padding: 1.75rem 1.75rem 1.25rem;
  animation: modal-in .3s cubic-bezier(.25,.1,.25,1);
}
@keyframes modal-in {
  from { opacity: 0; transform: scale(.96) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal::-webkit-scrollbar { width: 4px; }
.modal::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 2px; }

.modal-title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--gray-900);
  letter-spacing: -.02em;
}
.modal-actions {
  display: flex;
  gap: .5rem;
  justify-content: flex-end;
  margin-top: 1.25rem;
  padding-top: .75rem;
  border-top: .5px solid var(--gray-200);
}

/* --- Toast (Apple notification style) --- */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.toast {
  padding: .75rem 1.25rem;
  border-radius: var(--radius);
  font-size: .8125rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transform: translateX(120%);
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
  display: flex;
  align-items: center;
  gap: .5rem;
  backdrop-filter: blur(12px);
}
.toast-visible { transform: translateX(0); }
.toast-success { background: rgba(52,199,89,.95); color: #fff; }
.toast-error { background: rgba(255,59,48,.95); color: #fff; }
.toast-warning { background: rgba(255,149,0,.95); color: #fff; }
.toast-info { background: rgba(255,255,255,.92); color: var(--gray-800); border: .5px solid var(--gray-200); }

/* --- Admin Panel --- */
.admin-controls {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1.5rem;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(20px);
  border-bottom: .5px solid rgba(0,0,0,.06);
  flex-wrap: wrap;
}
.admin-filters { display: flex; gap: .5rem; flex-wrap: wrap; flex: 1; }
.filter-select {
  padding: .4rem .75rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: .75rem;
  background: #fff;
  font-family: var(--font);
  transition: var(--transition);
}
.filter-select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,122,255,.1); }

.admin-table-container { padding: 1.5rem; overflow-x: auto; }
.admin-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: .8125rem;
}
.admin-table th {
  text-align: left;
  padding: .625rem .75rem;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  font-weight: 600;
  font-size: .6875rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.admin-table td {
  padding: .75rem;
  border-bottom: .5px solid var(--gray-100);
  vertical-align: middle;
}
.admin-table tr { transition: var(--transition); }
.admin-table tr:hover td { background: rgba(0,122,255,.02); }

/* --- Stage chips --- */
.stage-chip {
  display: inline-flex;
  align-items: center;
  padding: .2rem .5rem;
  border-radius: 999px;
  font-size: .6875rem;
  font-weight: 500;
  margin: .1rem;
  color: #fff;
}

/* --- Loading --- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--gray-400);
  font-size: .875rem;
}
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin-right: .625rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Responsive --- */
@media (max-width: 768px) {
  .top-bar { padding: .5rem 1rem; }
  .top-bar-left { gap: .5rem; }
  .stats-bar { display: none; }
  .search-input { width: 140px; }
  .search-input:focus { width: 180px; }
  .board-container { padding: .75rem; gap: .75rem; }
  .board-column { min-width: 260px; }
  .admin-controls { flex-direction: column; align-items: stretch; }
  .management-bar { overflow-x: auto; padding: .5rem 1rem; }
}

/* --- Scrollbar global --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }