:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-base: 16px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 70px rgba(15, 23, 42, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  font-size: var(--font-size-base);
}

body {
  min-height: 100vh;
  margin: 0;
  background: #f4f7fb;
  color: #172033;
}

button,
input,
select,
textarea {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.theme-toggle-input {
  position: fixed;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.auth-logo {
  width: 60px;
  height: 60px;
  object-fit: contain;
}

.auth-brand-name {
  font-size: 1.1rem;
  font-weight: 700;
}

.app-shell {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --surface-strong: #eef2f7;
  --text: #172033;
  --muted: #65758b;
  --border: #dce4ef;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --primary-soft: #e8f0ff;
  --success: #168a55;
  --success-soft: #e8f7ef;
  --warning: #b7791f;
  --warning-soft: #fff6df;
  --danger: #c24138;
  --danger-soft: #fff0ee;
  --info: #0f7490;
  --info-soft: #e6f7fb;
  --sidebar: #0f172a;
  --sidebar-soft: #1e293b;
  --sidebar-text: #e5edf8;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  background: var(--bg);
  color: var(--text);
  transition: background-color 180ms ease, color 180ms ease;
}

.theme-toggle-input:checked ~ .app-shell {
  color-scheme: dark;
  --bg: #111827;
  --surface: #182233;
  --surface-soft: #202c40;
  --surface-strong: #2b394f;
  --text: #eef4ff;
  --muted: #a7b4c8;
  --border: #33445c;
  --primary: #7aa7ff;
  --primary-strong: #a9c4ff;
  --primary-soft: #233b66;
  --success: #67d39b;
  --success-soft: #18392b;
  --warning: #f1c96f;
  --warning-soft: #43351b;
  --danger: #ff8f86;
  --danger-soft: #4a2526;
  --info: #67d8ef;
  --info-soft: #173846;
  --sidebar: #0b1120;
  --sidebar-soft: #172033;
  --sidebar-text: #eef4ff;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-text {
  display: grid;
  gap: 0.05rem;
  line-height: 1.1;
}

.brand-text strong {
  font-size: 0.95rem;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.83rem;
}

.sidebar .brand-text span {
  color: #9fb0ca;
}

.eyebrow {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.button,
.icon-button {
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-block-size: 2.5rem;
  transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.button {
  padding: 0.65rem 1rem;
  font-weight: 750;
}

.button-small {
  min-block-size: 2rem;
  padding: 0.35rem 0.6rem;
  font-size: 0.78rem;
}

.button:hover,
.icon-button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.18);
}

.button-primary:hover {
  background: var(--primary-strong);
}

.button-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.button-secondary.is-connected {
  background: var(--success-soft);
  border-color: transparent;
  color: var(--success);
}

.button-ghost {
  background: var(--surface-soft);
  border-color: var(--border);
  color: var(--text);
}

.button-danger {
  background: var(--danger);
  color: #ffffff;
}

.icon-button {
  inline-size: 2.5rem;
  padding: 0;
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  font-weight: 800;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: #f4f7fb;
}

.auth-card {
  width: min(100%, 28rem);
  display: grid;
  gap: 2rem;
  padding: 2rem;
  border: 1px solid #dce4ef;
  border-radius: var(--radius-md);
  background: #ffffff;
  box-shadow: var(--shadow-lg);
}

.auth-brand .brand-text span {
  color: #65758b;
}

.auth-content {
  display: grid;
  gap: 0.7rem;
}

.auth-content h1 {
  margin: 0;
  font-size: 2rem;
}

.auth-content p {
  margin: 0;
  color: #65758b;
  line-height: 1.6;
}

.auth-button {
  width: 100%;
  background: #2563eb;
  color: #ffffff;
  border: none;
  padding: 14px 20px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
}

.auth-button:hover {
  background: #1d4ed8;
}

.auth-form {
  display: grid;
  gap: 1rem;
}

.auth-form label {
  display: grid;
  gap: 0.45rem;
  color: #172033;
  font-weight: 750;
}

.auth-form input {
  min-block-size: 2.75rem;
  border: 1px solid #dce4ef;
  border-radius: var(--radius-sm);
  padding: 0 0.85rem;
}

.form-error {
  margin: 0;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background: #fff0ee;
  color: #c24138;
  font-weight: 750;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
}