/* ==========================================================================
   DSF2026 · Design system
   ========================================================================== */

:root {
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #6366f1;
  --color-primary-50: #eef2ff;
  --color-accent: #06b6d4;

  --color-success: #16a34a;
  --color-success-bg: #ecfdf5;
  --color-danger: #dc2626;
  --color-danger-bg: #fef2f2;
  --color-warning: #d97706;

  --color-ink: #111827;
  --color-body: #374151;
  --color-muted: #6b7280;
  --color-subtle: #9ca3af;

  --color-bg: #f6f7fb;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-border-strong: #d1d5db;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.06);
  --shadow-md: 0 6px 20px -4px rgba(17, 24, 39, 0.10), 0 2px 6px -2px rgba(17, 24, 39, 0.06);
  --shadow-lg: 0 20px 45px -12px rgba(79, 70, 229, 0.25);

  --transition: 160ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  font-family: var(--font-sans);
  color: var(--color-body);
  background: var(--color-bg);
  background-image:
    radial-gradient(1100px 480px at 100% -10%, rgba(79, 70, 229, 0.08), transparent 60%),
    radial-gradient(900px 420px at -10% 0%, rgba(6, 182, 212, 0.07), transparent 55%);
  background-attachment: fixed;
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.01em;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

code {
  background: var(--color-primary-50);
  color: var(--color-primary-dark);
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
  font-size: 0.9em;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 1.25rem 0;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus,
.form-control:focus, .form-check-input:focus, .form-select:focus {
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.18);
  outline: none;
}

/* ==========================================================================
   Layout shell
   ========================================================================== */

.app-main {
  flex: 1 0 auto;
  width: 100%;
  padding-bottom: 3rem;
}

.page-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ==========================================================================
   Navbar
   ========================================================================== */

.app-navbar {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1030;
}

.app-navbar .navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-ink);
  letter-spacing: -0.02em;
}

.app-navbar .brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}

.app-navbar .nav-link {
  font-weight: 600;
  color: var(--color-muted) !important;
  padding: 0.5rem 0.9rem !important;
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

.app-navbar .nav-link:hover {
  color: var(--color-ink) !important;
  background: rgba(79, 70, 229, 0.08);
}

.app-navbar .nav-link.active {
  color: var(--color-primary) !important;
  background: var(--color-primary-50);
}

.app-navbar .nav-item form {
  margin: 0;
}

.navbar-greeting {
  color: var(--color-muted) !important;
  font-weight: 600;
  padding: 0.5rem 0.6rem !important;
}

.navbar-greeting strong {
  color: var(--color-ink);
}

.navbar-toggler {
  border: none !important;
  box-shadow: none !important;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1.15rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
  border-width: 1.5px;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.35rem 0.8rem;
  border-radius: 8px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-color: var(--color-primary);
  box-shadow: 0 8px 18px -6px rgba(79, 70, 229, 0.55);
}

.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  border-color: var(--color-primary-dark);
  color: #fff;
}

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

.btn-outline-primary:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, var(--color-danger));
  border-color: var(--color-danger);
  box-shadow: 0 8px 18px -6px rgba(220, 38, 38, 0.45);
}

.btn-light {
  background: #fff;
  border-color: var(--color-border-strong);
  color: var(--color-body);
}

.btn-link {
  font-weight: 600;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* ==========================================================================
   Cards & surfaces
   ========================================================================== */

.surface-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin: 2rem 0 1.5rem;
}

.page-header .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
  display: block;
}

.page-header h1 {
  margin: 0;
  font-size: 1.85rem;
}

.page-header p {
  color: var(--color-muted);
  margin: 0.35rem 0 0;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group,
.mb-field {
  margin-bottom: 1.15rem;
}

label, .control-label {
  font-weight: 600;
  color: var(--color-ink);
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  display: inline-block;
}

.form-control, .form-select {
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border-strong);
  padding: 0.6rem 0.85rem;
  font-size: 0.97rem;
  background: #fbfbfd;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.form-control:focus, .form-select:focus {
  border-color: var(--color-primary-light);
  background: #fff;
}

.form-control::placeholder {
  color: var(--color-subtle);
}

.text-danger {
  color: var(--color-danger) !important;
  font-size: 0.85rem;
}

.validation-summary-errors {
  background: var(--color-danger-bg);
  border: 1px solid rgba(220, 38, 38, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.1rem;
}

.validation-summary-errors ul {
  margin: 0;
  padding-left: 1.1rem;
}

.form-check-input {
  border: 1.5px solid var(--color-border-strong);
}

.form-check-input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.input-with-icon {
  position: relative;
}

.input-with-icon .form-control {
  padding-left: 2.6rem;
}

.input-with-icon i,
.input-with-icon .field-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-subtle);
  pointer-events: none;
}

.password-toggle {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: none;
  color: var(--color-subtle);
  padding: 0.25rem 0.4rem;
  cursor: pointer;
}

.password-toggle:hover {
  color: var(--color-primary);
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.table {
  margin: 0;
}

.table thead th {
  background: #fafafe;
  color: var(--color-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  border-bottom: 1px solid var(--color-border);
  padding: 0.9rem 1.25rem;
}

.table tbody td {
  padding: 0.95rem 1.25rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-body);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr {
  transition: background var(--transition);
}

.table tbody tr:hover {
  background: var(--color-primary-50);
}

.row-actions {
  display: flex;
  gap: 0.4rem;
  justify-content: flex-end;
}

.row-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  border: 1.5px solid var(--color-border);
  color: var(--color-muted);
  background: #fff;
  transition: all var(--transition);
}

.row-actions a:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
  background: var(--color-primary-50);
}

.row-actions a.action-delete:hover {
  border-color: var(--color-danger);
  color: var(--color-danger);
  background: var(--color-danger-bg);
}

.avatar-chip {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary-50), #e0f2fe);
  color: var(--color-primary-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  margin-right: 0.75rem;
}

.name-cell {
  display: flex;
  align-items: center;
}

.badge-age {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--color-primary-50);
  color: var(--color-primary-dark);
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3.5rem 1.5rem;
  color: var(--color-muted);
}

.empty-state .empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  border-radius: 18px;
  background: var(--color-primary-50);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.empty-state h3 {
  color: var(--color-ink);
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

/* ==========================================================================
   Auth pages
   ========================================================================== */

.auth-shell {
  min-height: calc(100vh - 130px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1rem;
}

.auth-card {
  width: 100%;
  max-width: 960px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  border: 1px solid var(--color-border);
}

.auth-panel {
  padding: 3rem 2.5rem;
  background: linear-gradient(155deg, var(--color-primary) 0%, var(--color-primary-dark) 55%, #312e81 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.auth-panel::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -80px;
  right: -80px;
}

.auth-panel::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(6, 182, 212, 0.18);
  bottom: -60px;
  left: -50px;
}

.auth-panel .panel-mark {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.auth-panel h2 {
  color: #fff;
  font-size: 1.65rem;
  position: relative;
  z-index: 1;
}

.auth-panel p {
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  z-index: 1;
  max-width: 26ch;
}

.auth-panel ul {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  position: relative;
  z-index: 1;
}

.auth-panel ul li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.65rem;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.92rem;
}

.auth-panel ul li i {
  color: #a5f3fc;
}

.auth-form-wrap {
  padding: 3rem 2.75rem;
}

.auth-form-wrap h1 {
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

.auth-form-wrap .auth-subtitle {
  color: var(--color-muted);
  margin-bottom: 1.75rem;
}

.auth-form-wrap .btn-primary {
  width: 100%;
  padding: 0.7rem 1rem;
  margin-top: 0.4rem;
}

.auth-switch {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--color-muted);
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .auth-card {
    grid-template-columns: 1fr;
  }
  .auth-panel {
    padding: 2.25rem;
  }
  .auth-form-wrap {
    padding: 2.25rem;
  }
}

/* ==========================================================================
   Home / hero
   ========================================================================== */

.hero {
  padding: 5rem 1.25rem 4rem;
  text-align: center;
}

.hero .eyebrow {
  display: inline-block;
  background: var(--color-primary-50);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  max-width: 46ch;
  margin: 0 auto 2rem;
  color: var(--color-muted);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  gap: 0.85rem;
  justify-content: center;
  flex-wrap: wrap;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  max-width: 1000px;
  margin: 3rem auto 0;
  padding: 0 1.25rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-card .feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--color-primary-50);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.9rem;
  font-size: 1.1rem;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.feature-card p {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin: 0;
}

/* ==========================================================================
   Alerts / status
   ========================================================================== */

.alert {
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 0.9rem 1.1rem;
}

.alert-danger {
  background: var(--color-danger-bg);
  border-color: rgba(220, 38, 38, 0.25);
  color: #991b1b;
}

.alert-warning-soft {
  background: #fffbeb;
  border: 1px solid rgba(217, 119, 6, 0.3);
  color: #92400e;
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
}

/* ==========================================================================
   Detail / confirm pages
   ========================================================================== */

.detail-card, .form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem;
}

.detail-card dt {
  color: var(--color-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.detail-card dd {
  font-size: 1.05rem;
  color: var(--color-ink);
  font-weight: 600;
  margin-bottom: 1rem;
}

.confirm-danger-card {
  border: 1px solid rgba(220, 38, 38, 0.25);
  background: var(--color-danger-bg);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}

.confirm-danger-card .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(220, 38, 38, 0.12);
  color: var(--color-danger);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.breadcrumb-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 1.25rem;
}

.breadcrumb-link:hover {
  color: var(--color-primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.app-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 1.25rem 0;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.app-footer .page-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.app-footer a {
  color: var(--color-muted);
  font-weight: 600;
}

.app-footer a:hover {
  color: var(--color-primary);
}

/* ==========================================================================
   Misc / animation
   ========================================================================== */

.fade-in {
  animation: fadeIn 320ms ease both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

::selection {
  background: rgba(79, 70, 229, 0.2);
}