* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 10% 5%, var(--md-sys-color-primary-container) 0%, transparent 30%),
    radial-gradient(circle at 90% 0%, var(--md-sys-color-secondary-container) 0%, transparent 28%),
    var(--md-sys-color-surface);
}

.loading-indicator {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 40;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--md-sys-color-primary), var(--md-sys-color-tertiary));
  opacity: 0;
}

body.is-page-loading .loading-indicator {
  opacity: 1;
  animation: loading-bar 1.2s ease-in-out infinite;
}

.app-backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(130deg, var(--md-sys-color-primary-tint), transparent 40%),
    linear-gradient(230deg, var(--md-sys-color-surface-tint), transparent 45%);
  opacity: 0.28;
}

.top-app-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  padding: 0.8rem 1.1rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  backdrop-filter: blur(9px);
  background: color-mix(in srgb, var(--md-sys-color-surface) 88%, white 12%);
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand {
  color: var(--md-sys-color-primary);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

.session-user {
  margin: 0;
  padding: 0.24rem 0.58rem;
  border-radius: 999px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.nav-link {
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.92rem;
}

.nav-link:hover {
  background: var(--md-sys-color-surface-container);
  border-color: var(--md-sys-color-outline-variant);
}

.nav-link.is-active {
  color: var(--md-sys-color-on-secondary-container);
  background: var(--md-sys-color-secondary-container);
  border-color: transparent;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.theme-control-wrap {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.theme-control-wrap label {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.82rem;
}

.theme-control {
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 999px;
  background: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface);
  padding: 0.32rem 0.64rem;
  font: inherit;
}

.logout-form {
  margin: 0;
}

.page-shell {
  position: relative;
  display: grid;
  gap: 0.9rem;
  width: min(1100px, calc(100vw - 1.4rem));
  margin: 0 auto;
  padding: 1.1rem 0 1.6rem;
}

.flash {
  margin: 0;
  padding: 0.72rem 0.82rem;
  border-radius: 14px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container);
}

.flash-notice {
  color: var(--md-sys-color-on-tertiary-container);
  border-color: var(--md-sys-color-tertiary-container);
  background: color-mix(in srgb, var(--md-sys-color-tertiary-container) 30%, white 70%);
}

.flash-error {
  color: var(--md-sys-color-on-error-container);
  border-color: var(--md-sys-color-error-container);
  background: color-mix(in srgb, var(--md-sys-color-error-container) 25%, white 75%);
}

.hero,
.sandbox {
  border-radius: 24px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-low);
  box-shadow: var(--elevation-card);
}

.hero {
  padding: 1.3rem;
}

.sandbox {
  padding: 1.05rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  color: var(--md-sys-color-primary);
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-weight: 600;
}

h1 {
  margin: 0.28rem 0 0.5rem;
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-heading);
  font-size: clamp(1.45rem, 3vw, 2.05rem);
  line-height: 1.15;
}

h2 {
  margin: 0;
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-heading);
  font-size: 1.08rem;
}

.lede {
  margin: 0;
  color: var(--md-sys-color-on-surface-variant);
  max-width: 68ch;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
  margin-bottom: 0.7rem;
  flex-wrap: wrap;
}

.stat-strip {
  margin-top: 0.95rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

.stat-item {
  margin: 0;
  padding: 0.72rem 0.78rem;
  border-radius: 16px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container);
}

.stat-label {
  margin: 0;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.8rem;
}

.stat-value {
  margin: 0.2rem 0 0;
  color: var(--md-sys-color-on-surface);
  font-size: 1.36rem;
  font-weight: 700;
}

form {
  display: grid;
  gap: 0.45rem;
}

.stack-form {
  max-width: 560px;
}

label {
  font-size: 0.9rem;
  color: var(--md-sys-color-on-surface-variant);
}

input,
select {
  width: 100%;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 12px;
  padding: 0.56rem 0.64rem;
  font: inherit;
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface);
}

input:focus,
select:focus {
  outline: 2px solid color-mix(in srgb, var(--md-sys-color-primary) 35%, transparent);
  border-color: var(--md-sys-color-primary);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.54rem;
}

.checkbox-row input {
  width: auto;
}

button,
.button {
  border: 0;
  border-radius: 999px;
  padding: 0.54rem 0.86rem;
  font: inherit;
  font-weight: 600;
  color: var(--md-sys-color-on-primary);
  background: var(--md-sys-color-primary);
  cursor: pointer;
}

button:hover,
.button:hover {
  filter: brightness(0.97);
}

button:disabled,
.button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.button-text {
  color: var(--md-sys-color-primary);
  background: transparent;
  border: 1px solid var(--md-sys-color-outline-variant);
}

.danger-button {
  color: var(--md-sys-color-on-error);
  background: var(--md-sys-color-error);
}

.inline-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.inline-actions form {
  display: inline-flex;
  gap: 0.42rem;
  align-items: center;
}

.inline-reset-form input {
  min-width: 160px;
}

form.is-loading button[type="submit"],
form.is-loading input[type="submit"] {
  opacity: 0.75;
}

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 12px;
  overflow: hidden;
  background: var(--md-sys-color-surface);
}

th,
td {
  padding: 0.54rem;
  text-align: left;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  vertical-align: top;
}

thead th {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.84rem;
  font-weight: 600;
  background: var(--md-sys-color-surface-container-high);
}

tbody tr:last-child td {
  border-bottom: 0;
}

a {
  color: var(--md-sys-color-primary);
}

.link-button {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.78rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 999px;
  color: var(--md-sys-color-primary);
  text-decoration: none;
  background: var(--md-sys-color-surface-container-low);
}

.link-button.is-active {
  color: var(--md-sys-color-on-secondary-container);
  background: var(--md-sys-color-secondary-container);
  border-color: transparent;
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.16rem 0.48rem;
  font-size: 0.76rem;
  text-transform: lowercase;
  border: 1px solid var(--md-sys-color-outline-variant);
}

.badge.ok {
  color: var(--md-sys-color-on-tertiary-container);
  background: var(--md-sys-color-tertiary-container);
  border-color: transparent;
}

.badge.warn,
.badge.danger {
  color: var(--md-sys-color-on-error-container);
  background: var(--md-sys-color-error-container);
  border-color: transparent;
}

.helper-text {
  margin: 0.24rem 0 0;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.82rem;
}

.auth-card {
  max-width: 520px;
}

.auth-form {
  max-width: 360px;
}

.form-error {
  margin: 0.5rem 0 0;
  color: var(--md-sys-color-error);
  font-weight: 600;
}

.form-note {
  margin: 0.35rem 0 0;
  color: var(--md-sys-color-on-surface-variant);
}

code {
  font-family: var(--font-code);
  background: var(--md-sys-color-surface-container-high);
  border-radius: 6px;
  padding: 0.1rem 0.25rem;
}

pre {
  margin: 0.6rem 0 0;
  border-radius: 12px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  padding: 0.75rem;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 880px) {
  .top-app-bar {
    padding: 0.7rem 0.8rem;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
    margin-left: 0;
  }

  .page-shell {
    width: min(100vw, calc(100vw - 0.9rem));
    padding-top: 0.8rem;
  }

  .hero,
  .sandbox {
    border-radius: 18px;
    padding: 0.9rem;
  }

  .inline-actions form {
    width: 100%;
    justify-content: flex-start;
  }
}

@keyframes loading-bar {
  0% {
    transform: scaleX(0.1);
  }
  50% {
    transform: scaleX(0.7);
  }
  100% {
    transform: scaleX(1);
  }
}