:root {
  --c-primary: #0F172A;
  --c-secondary: #334155;
  --c-accent: #14B8A6;
  --c-accent-dark: #0F766E;
  --c-bg: #F8FAFC;
  --c-surface: #FFFFFF;
  --c-border: #E2E8F0;
  --c-border-strong: #CBD5E1;
  --c-text: #1E293B;
  --c-muted: #64748B;
  --c-success: #047857;
  --c-success-bg: #ECFDF5;
  --c-warning: #B45309;
  --c-warning-bg: #FFFBEB;
  --c-danger: #B91C1C;
  --c-danger-bg: #FEF2F2;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, .08), 0 2px 6px rgba(15, 23, 42, .04);
  --ease: 150ms cubic-bezier(.4, 0, .2, 1);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--c-primary);
  line-height: 1.2;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  margin-bottom: .6rem;
}

h2 {
  font-size: 1.15rem;
  margin-bottom: .6rem;
}

a {
  color: var(--c-accent);
  text-decoration: none;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.app-main {
  padding: 32px 0 48px;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 100%;
}

.navbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--c-primary);
}

.navbar__brand-icon {
  width: 26px;
  height: 26px;
  color: var(--c-accent);
}

.navbar__brand-name span {
  color: var(--c-accent-dark);
}

.navbar__menu {
  display: inline-flex;
  align-items: center;
  gap: 18px;
}

.navbar__nav {
  margin: 0;
  padding: 0;
  list-style: none;
  display: inline-flex;
  gap: 14px;
}

.navbar__nav a {
  color: var(--c-secondary);
  font-weight: 500;
}

.navbar__logout {
  margin: 0;
}

.page-section {
  display: grid;
  gap: 20px;
}

.page-header {
  display: grid;
  gap: 6px;
}

.muted-text {
  color: var(--c-muted);
}

.surface {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.surface--spaced {
  display: grid;
  gap: 12px;
}

.grid-2 {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.actions-row form {
  margin: 0;
}

.btn {
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  padding: 9px 14px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}

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

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

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

.btn-secondary {
  background: var(--c-surface);
  color: var(--c-primary);
  border-color: var(--c-border-strong);
}

.btn-secondary:hover {
  background: var(--c-bg);
}

.btn-warning {
  background: var(--c-warning-bg);
  border-color: #FDE68A;
  color: var(--c-warning);
}

.btn-danger {
  background: var(--c-danger-bg);
  border-color: #FECACA;
  color: var(--c-danger);
}

.btn-block {
  width: 100%;
}

.alert {
  border-radius: var(--r-md);
  border: 1px solid transparent;
  padding: 12px 14px;
}

.alert-success {
  background: var(--c-success-bg);
  border-color: #BBF7D0;
  color: var(--c-success);
}

.alert-danger {
  background: var(--c-danger-bg);
  border-color: #FECACA;
  color: var(--c-danger);
}

.migration-list {
  margin: 0;
  padding-left: 20px;
}

.migration-list li + li {
  margin-top: 6px;
}

code {
  background: #F1F5F9;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  padding: 2px 6px;
  font-size: .85rem;
}

.login-shell {
  min-height: calc(100vh - 240px);
  display: grid;
  place-items: center;
}

.login-card {
  width: min(100%, 430px);
  display: grid;
  gap: 18px;
  box-shadow: var(--shadow-md);
}

.form-stack {
  display: grid;
  gap: 14px;
}

.form-field {
  display: grid;
  gap: 8px;
}

.form-label {
  font-weight: 600;
  color: var(--c-secondary);
}

.form-control {
  width: 100%;
  border: 1px solid var(--c-border-strong);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  background: #fff;
  color: var(--c-text);
}

.form-control:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, .15);
}

.form-validation {
  color: var(--c-danger);
  background: var(--c-danger-bg);
  border: 1px solid #FECACA;
  border-radius: var(--r-sm);
  padding: 10px 12px;
}

.footer {
  border-top: 1px solid var(--c-border);
  background: #fff;
}

.footer__inner {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer__copy {
  color: var(--c-muted);
  font-size: .9rem;
}

@media (max-width: 860px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .navbar__inner {
    gap: 12px;
  }

  .navbar__menu {
    gap: 12px;
  }

  .navbar__nav {
    gap: 10px;
  }
}