/* ============================================================
   CalcMed · Design System
   ============================================================ */

:root {
  --primary:       #2563eb;
  --primary-dark:  #1d4ed8;
  --primary-light: #eff6ff;
  --secondary:     #10b981;
  --warning:       #f59e0b;
  --warning-light: #fffbeb;
  --danger:        #ef4444;
  --danger-light:  #fef2f2;
  --text:          #1e293b;
  --text-muted:    #64748b;
  --border:        #e2e8f0;
  --bg:            #f8fafc;
  --card:          #ffffff;
  --shadow:        0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:     0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:     0 10px 15px rgba(0,0,0,.1),  0 4px 6px rgba(0,0,0,.05);
  --radius:        12px;
  --radius-sm:     8px;
  --font:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Utilidades ─────────────────────────────────────── */
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.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; }

/* ── Layout ─────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ── Header / Navbar ────────────────────────────────── */
.navbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.2rem;
}

.navbar-brand svg { width: 32px; height: 32px; }

.navbar-user {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .875rem;
}

.navbar-user .user-name {
  font-weight: 600;
  color: var(--text);
}

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: .35rem .75rem;
  cursor: pointer;
  font-size: .8rem;
  transition: all .2s;
  text-decoration: none;
}
.btn-logout:hover { background: var(--bg); color: var(--danger); border-color: var(--danger); }

/* ── Access Banner ──────────────────────────────────── */
.access-banner {
  padding: .7rem 1rem;
  font-size: .875rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  text-align: center;
}
.access-banner.active {
  background: #dcfce7;
  color: #166534;
  border-color: #bbf7d0;
}
.access-banner.warning {
  background: var(--warning-light);
  color: #92400e;
  border-color: #fde68a;
}
.access-banner a { color: inherit; text-decoration: underline; font-weight: 600; }

/* ── Auth Pages (login, register, activate) ─────────── */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
}

.auth-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 440px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo .logo-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-light);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: .75rem;
}

.auth-logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.auth-logo p {
  color: var(--text-muted);
  font-size: .875rem;
  margin-top: .25rem;
}

/* ── Forms ──────────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }

.form-label {
  display: block;
  font-size: .875rem;
  font-weight: 500;
  margin-bottom: .4rem;
  color: var(--text);
}

.form-control {
  width: 100%;
  padding: .65rem .9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  color: var(--text);
  background: var(--card);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

.form-control.is-invalid {
  border-color: var(--danger);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-hint {
  font-size: .78rem;
  color: var(--text-muted);
  margin-top: .25rem;
}

.form-error {
  font-size: .8rem;
  color: var(--danger);
  margin-top: .25rem;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  padding-right: 2.5rem;
}

/* ── Buttons ────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .7rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover { background: #f1f5f9; }

.btn-warning {
  background: var(--warning);
  color: #fff;
  width: 100%;
}
.btn-warning:hover { background: #d97706; }

.btn-sm { padding: .4rem .9rem; font-size: .83rem; }
.btn-outline-primary {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline-primary:hover { background: var(--primary); color: #fff; }

/* Loading spinner en botón */
.btn.loading { opacity: .7; pointer-events: none; }
.btn.loading::after {
  content: '';
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin-left: .5rem;
}

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

/* ── Divider ────────────────────────────────────────── */
.divider {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--text-muted);
  font-size: .8rem;
  margin: 1.25rem 0;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Alerts ─────────────────────────────────────────── */
.alert {
  padding: .85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: .6rem;
}
.alert-error   { background: var(--danger-light);  color: #991b1b; border: 1px solid #fecaca; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-warning { background: var(--warning-light); color: #92400e; border: 1px solid #fde68a; }
.alert-info    { background: var(--primary-light); color: #1e40af; border: 1px solid #bfdbfe; }

/* ── Auth link row ──────────────────────────────────── */
.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: .875rem;
  color: var(--text-muted);
}
.auth-footer a { color: var(--primary); font-weight: 600; text-decoration: none; }
.auth-footer a:hover { text-decoration: underline; }

/* ── Code input ─────────────────────────────────────── */
.code-input {
  font-family: 'Courier New', monospace;
  font-size: 1.1rem;
  letter-spacing: .15em;
  text-align: center;
  text-transform: uppercase;
}

/* ── Gallery ────────────────────────────────────────── */
.gallery-header {
  padding: 2rem 0 1rem;
}

.gallery-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.gallery-header p {
  color: var(--text-muted);
  margin-top: .25rem;
}

.gallery-filters {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.filter-btn {
  padding: .4rem .9rem;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--card);
  font-size: .83rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-muted);
  transition: all .15s;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  padding-bottom: 3rem;
}

.calc-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1.5px solid var(--border);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}
.calc-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.calc-card-icon {
  height: 120px;
  background: linear-gradient(135deg, var(--primary-light), #e0f2fe);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.calc-card-body {
  padding: 1rem;
  flex: 1;
}

.calc-card-title {
  font-size: .95rem;
  font-weight: 700;
  margin-bottom: .35rem;
  color: var(--text);
}

.calc-card-desc {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.calc-card-footer {
  padding: .75rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
  font-size: .78rem;
  color: var(--primary);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: .3rem;
}

.badge {
  display: inline-block;
  padding: .2rem .55rem;
  border-radius: 999px;
  font-size: .7rem;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}

/* ── Payment page ───────────────────────────────────── */
.payment-wrap {
  max-width: 640px;
  margin: 3rem auto;
  padding: 0 1rem 3rem;
}

.payment-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.payment-method-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
}
.payment-method-card:hover, .payment-method-card.selected {
  border-color: var(--primary);
  background: var(--primary-light);
}
.payment-method-card .method-icon { font-size: 2rem; margin-bottom: .5rem; }
.payment-method-card .method-name { font-weight: 600; font-size: .9rem; }

.plan-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.plan-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  position: relative;
}
.plan-card:hover, .plan-card.selected {
  border-color: var(--primary);
}
.plan-card.recommended { border-color: var(--primary); }
.plan-card .plan-badge {
  position: absolute;
  top: -10px; left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  padding: .2rem .6rem;
  border-radius: 999px;
}
.plan-card .plan-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}
.plan-card .plan-period { color: var(--text-muted); font-size: .85rem; }
.plan-card .plan-name { font-weight: 600; margin-top: .5rem; }

/* ── Admin ──────────────────────────────────────────── */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 220px;
  background: var(--text);
  color: #fff;
  padding: 1.5rem 0;
  flex-shrink: 0;
}

.admin-sidebar .sidebar-brand {
  padding: 0 1.25rem 1.5rem;
  font-weight: 700;
  font-size: 1rem;
  color: #93c5fd;
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: 1rem;
}

.admin-sidebar a {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.25rem;
  color: rgba(255,255,255,.7);
  text-decoration: none;
  font-size: .875rem;
  transition: all .15s;
}
.admin-sidebar a:hover, .admin-sidebar a.active {
  background: rgba(255,255,255,.1);
  color: #fff;
}

.admin-main {
  flex: 1;
  padding: 2rem;
  overflow-x: auto;
}

.admin-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.admin-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}
.data-table th, .data-table td {
  padding: .6rem .75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  background: var(--bg);
  font-weight: 600;
  color: var(--text-muted);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.data-table tr:hover td { background: var(--bg); }

.status-badge {
  display: inline-block;
  padding: .2rem .6rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
}
.status-active  { background: #dcfce7; color: #166534; }
.status-expired { background: var(--danger-light); color: #991b1b; }
.status-pending { background: var(--warning-light); color: #92400e; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .auth-card { padding: 2rem 1.25rem; }
  .plan-cards { grid-template-columns: 1fr; }
  .calculator-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .admin-sidebar { display: none; }
  .navbar-brand span.brand-text { display: none; }
}

/* ── PWA Install banner ──────────────────────────────── */
.pwa-banner {
  position: fixed;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: #fff;
  padding: .75rem 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: .875rem;
  z-index: 200;
  max-width: 90vw;
}
.pwa-banner button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: .4rem .9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .83rem;
  font-weight: 600;
  white-space: nowrap;
}
.pwa-banner .pwa-dismiss {
  background: transparent;
  color: rgba(255,255,255,.6);
  padding: .2rem;
}

/* ── Offline notice ─────────────────────────────────── */
.offline-notice {
  background: #fef3c7;
  color: #92400e;
  text-align: center;
  padding: .4rem;
  font-size: .8rem;
  display: none;
}
body.offline .offline-notice { display: block; }