/* ScrubKit — Global Styles */

/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-success: #16a34a;
  --color-success-light: #dcfce7;
  --color-warning: #d97706;
  --color-warning-light: #fef3c7;
  --color-danger: #dc2626;
  --color-danger-light: #fee2e2;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-focus: #93c5fd;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;

  --transition: 150ms ease;
}

/* ===========================
   Reset & Base
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea, select {
  font-family: inherit;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 600;
  color: var(--color-text);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p { color: var(--color-text); }

/* ===========================
   Layout
   =========================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container--narrow {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  text-decoration: none;
  color: #ffffff;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary-light);
  text-decoration: none;
}

.btn-danger {
  background-color: var(--color-danger);
  color: #ffffff;
  border-color: var(--color-danger);
  box-shadow: var(--shadow-sm);
}

.btn-danger:hover {
  background-color: #b91c1c;
  border-color: #b91c1c;
  text-decoration: none;
  color: #ffffff;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-border);
  color: var(--color-text);
  text-decoration: none;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.0625rem;
}

/* ===========================
   Forms
   =========================== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-label--required::after {
  content: " *";
  color: var(--color-danger);
}

.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input::placeholder {
  color: var(--color-text-light);
}

.form-input:disabled {
  background-color: var(--color-bg);
  cursor: not-allowed;
  opacity: 0.7;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.form-error {
  font-size: 0.8125rem;
  color: var(--color-danger);
}

/* ===========================
   Alerts
   =========================== */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 0.9375rem;
}

.alert-error {
  background-color: var(--color-danger-light);
  border-color: #fca5a5;
  color: #991b1b;
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: #86efac;
  color: #14532d;
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-color: #fcd34d;
  color: #78350f;
}

.alert-info {
  background-color: var(--color-primary-light);
  border-color: #93c5fd;
  color: #1e40af;
}

.alert[hidden] {
  display: none;
}

/* ===========================
   Cards
   =========================== */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ===========================
   Navigation
   =========================== */
.nav {
  display: flex;
  align-items: center;
  height: 60px;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
}

.nav__logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.025em;
}

.nav__logo:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: 1rem;
}

.nav__link {
  padding: 0.375rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: background-color var(--transition), color var(--transition);
}

.nav__link:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
}

.nav__link--active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.nav__spacer {
  flex: 1;
}

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

/* ===========================
   Badges / Status
   =========================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2em 0.6em;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-gray {
  background-color: #f1f5f9;
  color: var(--color-text-muted);
}

.badge-blue {
  background-color: var(--color-primary-light);
  color: #1e40af;
}

.badge-yellow {
  background-color: var(--color-warning-light);
  color: #92400e;
}

.badge-green {
  background-color: var(--color-success-light);
  color: #14532d;
}

.badge-red {
  background-color: var(--color-danger-light);
  color: #991b1b;
}

/* ===========================
   Progress Bar
   =========================== */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

.progress-bar__fill--success {
  background-color: var(--color-success);
}

/* ===========================
   Loading spinner
   =========================== */
.spinner {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  vertical-align: middle;
}

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

/* ===========================
   Page layout helpers
   =========================== */
.page-header {
  padding: 2rem 0 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.page-header__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.page-header__subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.section {
  margin-bottom: 2.5rem;
}

.section__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 1rem;
}

/* ===========================
   Auth pages layout
   =========================== */
.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background-color: var(--color-bg);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem;
}

.auth-logo {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-logo__text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.025em;
}

.auth-logo__tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.auth-title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

.auth-subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.auth-form__submit {
  margin-top: 0.5rem;
  width: 100%;
}

.auth-footer {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.375rem; }

  .container {
    padding: 0 1rem;
  }

  .nav__links {
    display: none;
  }

  .nav__inner {
    gap: 1rem;
  }
}