/* ============================================================
   Variables y Reset
   ============================================================ */
:root {
  --color-bg:        #f5f6fa;
  --color-surface:   #ffffff;
  --color-border:    #e2e8f0;
  --color-primary:   #3b82f6;
  --color-primary-h: #2563eb;
  --color-success:   #22c55e;
  --color-warning:   #f59e0b;
  --color-error:     #ef4444;
  --color-text:      #1e293b;
  --color-muted:     #64748b;
  --radius:          0.75rem;
  --shadow:          0 2px 12px rgba(0,0,0,.08);
  --transition:      0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================================
   Header
   ============================================================ */
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 2rem;
  text-align: center;
}

.app-header h1 { font-size: 1.6rem; font-weight: 700; }
.subtitle       { color: var(--color-muted); margin-top: .25rem; font-size: .9rem; }

/* ============================================================
   Layout principal
   ============================================================ */
.app-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1.5rem;
  max-width: 1100px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1.5rem;
  flex: 1;
}

/* El panel de resumen ocupa las dos columnas en la segunda fila */
.summary-card {
  grid-column: 1 / -1;
}

@media (max-width: 768px) {
  .app-main { grid-template-columns: 1fr; }
  .summary-card { grid-column: 1; }
}

/* ============================================================
   Card base
   ============================================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}

.card h3 {
  font-size: .95rem;
  font-weight: 600;
  margin: 1.25rem 0 .6rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* ============================================================
   Dropzone
   ============================================================ */
.dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
  margin-bottom: 1rem;
}

.dropzone:hover,
.dropzone:focus,
.dropzone.drag-over {
  border-color: var(--color-primary);
  background: #eff6ff;
  outline: none;
}

.dropzone-icon { font-size: 2.5rem; margin-bottom: .5rem; }
.dropzone p    { color: var(--color-muted); font-size: .95rem; line-height: 1.5; }
.dropzone span { color: var(--color-primary); font-weight: 500; }

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

/* ============================================================
   Preview
   ============================================================ */
.preview-container {
  position: relative;
  margin-bottom: 1rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.preview-container img {
  width: 100%;
  max-height: 280px;
  object-fit: contain;
  display: block;
  background: var(--color-bg);
}

#btn-clear {
  position: absolute;
  top: .5rem;
  right: .5rem;
}

/* ============================================================
   Botones
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .65rem 1.4rem;
  border-radius: .5rem;
  font-size: .95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background var(--transition), opacity var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  width: 100%;
}
.btn-primary:hover:not(:disabled) { background: var(--color-primary-h); }
.btn-primary:disabled              { opacity: .5; cursor: not-allowed; }

.btn-ghost {
  background: rgba(0,0,0,.06);
  color: var(--color-text);
  padding: .35rem .75rem;
  font-size: .8rem;
}
.btn-ghost:hover { background: rgba(0,0,0,.12); }

/* ============================================================
   Spinner
   ============================================================ */
.spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  padding: 1.25rem 0;
  color: var(--color-muted);
  font-size: .9rem;
}

.spinner-circle {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   Result box
   ============================================================ */
.result-box {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-size: .9rem;
  border: 1px solid transparent;
}

.result-success {
  background: #f0fdf4;
  border-color: #bbf7d0;
  color: #166534;
}

.result-warning {
  background: #fffbeb;
  border-color: #fde68a;
  color: #92400e;
}

.result-error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}

.result-title { font-weight: 600; margin-bottom: .5rem; }

.ticket-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: .75rem;
  font-size: .875rem;
}

.ticket-table th,
.ticket-table td {
  padding: .35rem .6rem;
  text-align: left;
  border-bottom: 1px solid rgba(0,0,0,.07);
}

.ticket-table th {
  color: var(--color-muted);
  font-weight: 500;
  width: 35%;
}

/* ============================================================
   Summary panel
   ============================================================ */
.summary-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: .5rem;
}

.stat {
  background: var(--color-bg);
  border-radius: .5rem;
  padding: .9rem 1rem;
  text-align: center;
}

.stat-label {
  display: block;
  font-size: .75rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .35rem;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* ============================================================
   Ticket list
   ============================================================ */
.ticket-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.ticket-item {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .75rem;
  background: var(--color-bg);
  border-radius: .5rem;
  font-size: .875rem;
}

.ticket-item.empty { color: var(--color-muted); font-style: italic; }

.ticket-date  { color: var(--color-muted); min-width: 80px; }
.ticket-store { flex: 1; font-weight: 500; }
.ticket-amount {
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

/* ============================================================
   Category badge
   ============================================================ */
.ticket-category {
  display: inline-block;
  padding: .15rem .55rem;
  border-radius: 9999px;
  font-size: .75rem;
  font-weight: 600;
  white-space: nowrap;
  background: var(--color-border);
  color: var(--color-muted);
}

/* Colores por categoría */
.ticket-category[data-cat="comida(super)"] {
  background: #dcfce7;
  color: #166534;
}

.ticket-category[data-cat="gasolina"] {
  background: #ffedd5;
  color: #9a3412;
}

.ticket-category[data-cat="capricho"] {
  background: #fce7f3;
  color: #9d174d;
}

.ticket-category[data-cat="otros"] {
  background: #f1f5f9;
  color: #475569;
}

/* ============================================================
   Mejoras de responsividad
   ============================================================ */
@media (max-width: 480px) {
  .app-header { padding: 1rem 1.25rem; }
  .app-main   { margin: 1rem auto; padding: 0 1rem; gap: 1rem; }
  .card       { padding: 1.25rem; }

  .ticket-item {
    flex-wrap: wrap;
  }
  .ticket-date  { min-width: unset; }
  .ticket-store { min-width: 100%; order: -1; }

  .summary-stats { grid-template-columns: 1fr; }
}

/* ============================================================
   Utilidad
   ============================================================ */
.hidden { display: none !important; }

/* ============================================================
   Header — variante autenticado
   ============================================================ */
.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.header-auth {
  justify-content: space-between;
}

.header-guest {
  flex-direction: column;
  text-align: center;
  gap: .3rem;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
}

.header-icon { font-size: 1.4rem; }

.user-info {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-border);
}

.user-avatar-placeholder {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .95rem;
  flex-shrink: 0;
}

.user-name {
  font-weight: 500;
  font-size: .9rem;
  color: var(--color-text);
}

.btn-logout {
  font-size: .8rem;
  padding: .3rem .8rem;
  border: 1px solid var(--color-border);
  text-decoration: none;
  border-radius: .5rem;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .user-name { display: none; }
}

/* ============================================================
   Pantalla de Login
   ============================================================ */
.login-main {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 2rem 1.5rem;
}

.login-card {
  max-width: 420px;
  width: 100%;
  text-align: center;
  padding: 2.5rem 2rem;
}

.login-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.login-card h2 {
  font-size: 1.5rem;
  margin-bottom: .75rem;
}

.login-desc {
  color: var(--color-muted);
  font-size: .95rem;
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.btn-google {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  width: 100%;
  padding: .75rem 1.5rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: .5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
  transition: box-shadow var(--transition), background var(--transition);
  margin-bottom: 1.25rem;
}

.btn-google:hover {
  box-shadow: 0 3px 10px rgba(0,0,0,.14);
  background: #fafafa;
}

.google-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.login-note {
  font-size: .78rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.error-msg {
  color: var(--color-error);
  font-size: .9rem;
  padding: .75rem;
  background: #fef2f2;
  border-radius: .5rem;
}