/* ====================================
   DESIGN SYSTEM & VARIABLES
   ==================================== */

:root {
  /* Color palette - classically British */
  --color-primary: oklch(0.28 0.07 258);        /* Oxford navy */
  --color-primary-light: oklch(0.46 0.07 258);
  --color-primary-dark: oklch(0.18 0.05 258);

  --color-gold: oklch(0.72 0.12 82);            /* Brass / gold accent */

  --color-bg: oklch(0.97 0.015 82);             /* Warm parchment */
  --color-surface: oklch(0.99 0.008 82);        /* Warm white */
  --color-surface-alt: oklch(0.94 0.018 82);    /* Slightly deeper cream */

  --color-ink: oklch(0.16 0.025 258);           /* Deep charcoal-navy */
  --color-ink-secondary: oklch(0.42 0.04 258);
  --color-ink-muted: oklch(0.62 0.03 258);

  --color-border: oklch(0.86 0.018 82);
  --color-border-light: oklch(0.92 0.012 82);

  --color-success: oklch(0.42 0.12 165);        /* British racing green */
  --color-warning: oklch(0.72 0.14 65);
  --color-error: oklch(0.52 0.2 18);

  /* Typography */
  --font-family-base: Georgia, "Times New Roman", serif;
  --font-family-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Sizing */
  --size-touch-target: 44px;

  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --border-width: 1px;

  /* Motion */
  --transition-fast: 150ms ease-out;
  --transition-normal: 200ms ease-out;

  /* Z-index scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* Layout */
  --max-width-container: 1200px;
  --max-width-prose: 65ch;
}

/* ====================================
   RESET & BASE
   ==================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: 100%;
}

body {
  font-family: var(--font-family-ui);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-ink);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
}

/* Login page overrides — body scrolls and is not fixed-height */
body.login-body {
  overflow: auto;
  height: auto;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

p { margin: 0; }

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
}

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ====================================
   LAYOUT
   ==================================== */

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.main-content {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: var(--max-width-container);
  margin: 0 auto;
  padding: var(--space-lg);
  width: 100%;
}

/* ====================================
   NAVBAR
   ==================================== */

.navbar {
  background-color: var(--color-primary);
  border-bottom: 3px solid var(--color-gold);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  flex-shrink: 0;
}

.navbar-container {
  max-width: var(--max-width-container);
  margin: 0 auto;
  padding: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.navbar-brand {
  display: flex;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  color: var(--color-surface);
  letter-spacing: 0.01em;
}

.logo:hover { color: var(--color-gold); }

.logo-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-gold);
  flex-shrink: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
}

.menu-wrapper {
  position: relative;
}

.menu-toggle {
  background: none;
  color: var(--color-surface);
  font-size: 1.5rem;
  line-height: 1;
  padding: var(--space-sm) var(--space-md);
  min-width: var(--size-touch-target);
  min-height: var(--size-touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.menu-toggle:hover { background-color: var(--color-primary-light); }

.nav-dropdown {
  position: absolute;
  top: calc(100% + var(--space-sm));
  right: 0;
  min-width: 200px;
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px oklch(0 0 0 / 0.12);
  list-style: none;
  margin: 0;
  padding: var(--space-sm) 0;
  z-index: var(--z-dropdown);
}

.nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-ink);
  font-size: var(--font-size-base);
  min-height: var(--size-touch-target);
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast);
}

.nav-link:hover {
  background-color: var(--color-surface-alt);
  color: var(--color-primary);
}

/* ====================================
   BUTTONS
   ==================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  min-height: var(--size-touch-target);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  border: var(--border-width) solid transparent;
}

.btn-primary {
  background-color: var(--color-gold);
  color: var(--color-primary);
}

.btn-primary:hover { background-color: oklch(0.65 0.12 82); }
.btn-primary:active { transform: scale(0.98); }

.btn-primary:disabled {
  background-color: var(--color-ink-muted);
  cursor: not-allowed;
  opacity: 0.6;
}

/* ====================================
   FORMS
   ==================================== */

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-ink);
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background-color: var(--color-surface);
  color: var(--color-ink);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(0.28 0.07 258 / 0.12);
}

.form-input::placeholder { color: var(--color-ink-muted); }

/* ====================================
   RESPONSIVE
   ==================================== */

@media (min-width: 640px) {
  .container { padding: var(--space-xl) var(--space-lg); }
}

@media (min-width: 1024px) {
  .navbar-container { padding: var(--space-lg) var(--space-xl); }
  .container { padding: var(--space-2xl) var(--space-xl); }
}

/* ====================================
   LOGIN PAGE
   ==================================== */

.login-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-lg);
}

.login-card {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  box-shadow: 0 8px 32px oklch(0 0 0 / 0.08);
}

.login-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-gold);
}

.login-title {
  font-family: var(--font-family-base);
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  text-align: center;
}

.login-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-ink-muted);
  text-align: center;
  margin: 0;
}

.login-error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  text-align: center;
  margin: 0;
}

.login-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.login-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background-color: var(--color-bg);
  color: var(--color-ink);
  min-height: var(--size-touch-target);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(0.28 0.07 258 / 0.12);
}

.login-btn {
  width: 100%;
}

/* ====================================
   NAVBAR — signed-in user display
   ==================================== */

.nav-user {
  font-size: var(--font-size-sm);
  color: oklch(0.85 0.04 82);
  font-family: var(--font-family-base);
  margin-right: var(--space-sm);
  white-space: nowrap;
}

.nav-divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-xs) 0;
}

.nav-link--logout {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-size: inherit;
  color: var(--color-error);
  font-weight: var(--font-weight-medium);
  padding: var(--space-sm) var(--space-lg);
  min-height: var(--size-touch-target);
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.nav-link--logout:hover {
  background-color: var(--color-surface-alt);
}

/* ====================================
   ERROR PAGES
   ==================================== */

.error-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: var(--space-2xl);
}

.error-card {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: var(--font-size-4xl);
  font-family: var(--font-family-base);
  color: var(--color-gold);
  font-weight: var(--font-weight-bold);
  margin: 0 0 var(--space-sm);
}

.error-title {
  font-family: var(--font-family-base);
  font-size: var(--font-size-xl);
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

.error-message {
  color: var(--color-ink-muted);
  margin-bottom: var(--space-xl);
}