/**
 * The Flip - Main Stylesheet
 *
 * Browser Support:
 * - Chrome/Edge 100+ (2022+)
 * - Firefox 100+ (2022+)
 * - Safari 15.4+ (2022+)
 * - iOS Safari 15.4+
 * - No IE11, no legacy Edge
 *
 * Architecture:
 *  - CSS Reset
 *  - Design Tokens (CSS Custom Properties)
 *  - Base Styles
 *  - Layout
 *  - Components
 *  - Utilities (semantic, not numeric)
 *  - Responsive Overrides (mobile-first)
 */

/* ========================================
   CSS RESET
   Based on Josh Comeau's CSS Reset
   ======================================== */

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

* {
  margin: 0;
  padding: 0;
}

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -moz-tab-size: 4;
  tab-size: 4;
}

body {
  line-height: inherit;
}

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

p + p {
  margin-top: var(--space-3);
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
}

textarea {
  resize: vertical;
}

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

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

#root,
#__next {
  isolation: isolate;
}

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

/* ========================================
   DESIGN TOKENS
   ======================================== */

:root {
  /* Typography */
  --font-family: 'Inter', sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Spacing */
  --space-0: 0;
  --space-0-5: 0.125rem;
  --space-1: 0.25rem;
  --space-1-5: 0.375rem;
  --space-2: 0.5rem;
  --space-2-5: 0.625rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;

  /* Radii */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Surfaces & text */
  --color-background: #FBF7F0;
  --color-surface: #FFFFFF;
  --color-border-soft: #E7E5E4;
  --color-text-primary: #333333;
  --color-text-muted: #6b7280;

  /* Grays */
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;

  /* Accent / semantic */
  --color-accent: #F59E0B;
  --color-accent-hover: #d97706;
  --color-log: #1D4ED8;
  --color-log-hover: #1E40AF;
  --color-log-light-bg: #F0F9FF;
  --color-log-light-bg-hover: #DBEAFE;
  --color-log-light-border: #93C5FD;
  --color-log-dark: #1E3A8A;
  --color-problem: #DC2626;
  --color-problem-hover: #B91C1C;
  --color-problem-light-bg: #FEF2F2;
  --color-problem-light-bg-hover: #FEE2E2;
  --color-problem-light-border: #FCA5A5;
  --color-problem-dark: #991B1B;
  --color-success: #16a34a;
  --color-success-hover: #15803d;
  --color-success-bg: #D1FAE5;
  --color-success-text: #065F46;
  --color-success-border: #6EE7B7;
  --color-warning-bg: #FEF3C7;
  --color-warning-text: #B45309;
  --color-warning-border: #FCD34D;

  /* Inputs / avatar */
  --color-input-bg: #ffffff;
  --color-input-border: #d1d5db;
  --color-input-focus: #3b82f6;
  --color-avatar-bg: #d97706;
}

/* --- Colors (Dark Theme) --- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #1f1f1f;
    --color-surface: #252525;
    --color-border-soft: #2b2b2b;

    --color-text-primary: #cccccc;
    --color-text-muted: #9ca3af;

    --color-gray-100: #3a3a3a;
    --color-gray-200: #4a4a4a;
    --color-gray-300: #4a4a4a;
    --color-gray-400: #9ca3af;
    --color-gray-500: #9ca3af;
    --color-gray-600: #e5e7eb;
    --color-gray-700: #e5e7eb;
    --color-gray-800: #e5e7eb;

    --color-accent: #0078d4;
    --color-accent-hover: #026ec1;

    --color-log: #0078d4;
    --color-log-hover: #026ec1;
    --color-log-light-bg: #1a2332;
    --color-log-light-bg-hover: #223344;
    --color-log-light-border: #2a3a4d;
    --color-log-dark: #58a6ff;

    --color-problem: #f85149;
    --color-problem-hover: #e64545;
    --color-problem-light-bg: #2d1f1f;
    --color-problem-light-bg-hover: #3a2828;
    --color-problem-light-border: #4a2d2d;
    --color-problem-dark: #ffa198;

    --color-success: #2ea043;
    --color-success-hover: #3fb950;
    --color-success-bg: #1f2d1f;
    --color-success-text: #3fb950;
    --color-success-border: #2d4a2d;

    --color-input-bg: #2b2b2b;
    --color-input-border: #404040;
    --color-input-focus: #0078d4;
  }
}

/* ========================================
   BASE STYLES
   ======================================== */

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  overflow-x: hidden;
  /* Subtle grid pattern */
  background-image:
    linear-gradient(0deg, rgba(0, 0, 0, .01) 50%, transparent 50%),
    linear-gradient(90deg, rgba(0, 0, 0, .01) 50%, transparent 50%);
  background-size: 4px 4px;
}

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

/* --- App Header --- */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4rem;
  padding: var(--space-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  z-index: 30;
}

.brand-logo {
  height: 64px;
  width: auto;
  display: block;
}

/* --- Main Content --- */
.main-content {
  padding-top: 5rem;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  padding-bottom: var(--space-4);
  max-width: 72rem;
  margin: 0 auto;
}

/* --- Two-Column Layout --- */
.two-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.two-column__main {
  flex: 1;
  min-width: 0;
}

.two-column__sidebar {
  display: none;
}

/* ========================================
   COMPONENTS
   ======================================== */

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

.card--log {
  background-color: var(--color-log-light-bg);
  border-color: var(--color-log-light-border);
}

.card--problem {
  background-color: var(--color-problem-light-bg);
  border-color: var(--color-problem-light-border);
}

.card--padded {
  padding: var(--space-4);
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.card__title {
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.card__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- Messages (Django flash messages) --- */
.messages {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.message {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.message a {
  text-decoration: underline;
  font-weight: var(--font-medium);
}

.message--success {
  background-color: var(--color-log-light-bg);
  border: 1px solid var(--color-log-light-border);
  color: var(--color-log-dark);
}

.message--success a {
  color: var(--color-log-dark);
}

.message--error {
  background-color: var(--color-problem-light-bg);
  border: 1px solid var(--color-problem-light-border);
  color: var(--color-problem-dark);
}

.message--error a {
  color: var(--color-problem-dark);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-1-5) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
  transition: all 0.15s ease-in-out;
  cursor: pointer;
}

.btn--full {
  width: 100%;
  gap: var(--space-2);
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn--secondary {
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
  font-weight: var(--font-medium);
}

.btn--secondary:hover {
  background-color: var(--color-gray-200);
}

.btn--log {
  background-color: var(--color-log);
  color: white;
}

.btn--log:hover {
  background-color: var(--color-log-hover);
}

.btn--report {
  background-color: var(--color-problem);
  color: white;
}

.btn--report:hover {
  background-color: var(--color-problem-hover);
}

.btn--danger {
  background-color: var(--color-problem);
  color: white;
}

.btn--danger:hover {
  background-color: var(--color-problem-hover);
}

.btn--success {
  background-color: var(--color-success);
  color: white;
}

.btn--success:hover {
  background-color: var(--color-success-hover);
}

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

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

.btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
}

.btn--icon-only {
  flex: 0 0 auto !important;
}

.btn--dropdown {
  flex: 0 0 auto !important;
}

.btn__caret {
  font-size: 0.65em;
  opacity: 0.7;
}

.btn--status-good {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid var(--color-success-border);
}

.btn--status-good:hover {
  background-color: var(--color-success-border);
}

.btn--status-fixing {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
  border: 1px solid var(--color-warning-border);
}

.btn--status-fixing:hover {
  background-color: var(--color-warning-border);
}

.btn--status-broken {
  background-color: var(--color-problem-light-bg);
  color: var(--color-problem);
  border: 1px solid var(--color-problem-light-border);
}

.btn--status-broken:hover {
  background-color: var(--color-problem-light-border);
}

/* --- Pills & Badges --- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 1rem;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  line-height: 1;
}

.pill--status-fixing {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
  border: 1px solid var(--color-warning-border);
  padding: var(--space-1) var(--space-2);
}

.pill--status-good {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid var(--color-success-border);
  padding: var(--space-1) var(--space-2);
}

.pill--status-broken {
  background-color: var(--color-problem-light-bg);
  color: var(--color-problem);
  border: 1px solid var(--color-problem-light-border);
  padding: var(--space-1) var(--space-2);
}

.pill--open {
  background-color: var(--color-problem);
  color: white;
  padding: var(--space-1) var(--space-2);
}

.pill--closed {
  background-color: var(--color-success);
  color: white;
  padding: var(--space-1) var(--space-2);
}

.pill--neutral {
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
  padding: var(--space-1) var(--space-2);
}

.pill--filter {
  padding: var(--space-1-5) var(--space-3);
  white-space: nowrap;
  transition: all 0.15s ease;
}

.pill--filter-active {
  background-color: var(--color-accent);
  color: white;
  box-shadow: var(--shadow-sm);
}

.pill--filter-active:hover {
  background-color: var(--color-accent-hover);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  line-height: 1;
  border-radius: var(--radius-full);
}

.badge--warning {
  background-color: var(--color-problem);
  color: white;
}

.badge--success {
  background-color: var(--color-success);
  color: white;
}

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
}

.nav-link {
  padding: var(--space-1) var(--space-3);
  color: var(--color-text-primary);
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-border-soft);
}

.nav-link--active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: var(--font-bold);
}

.nav--icons {
  gap: var(--space-3);
  font-size: var(--text-xl);
}

.nav-icon {
  padding: var(--space-2);
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.nav-icon:hover {
  color: var(--color-accent);
}

.nav-icon--active {
  color: var(--color-accent);
}

/* --- Dropdown --- */
.dropdown {
  position: relative;
}

.dropdown__toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.dropdown__menu {
  position: absolute;
  top: var(--space-10);
  right: 0;
  width: 14rem;
  padding: var(--space-3);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-xl);
  z-index: 50;
}

.dropdown__menu--left {
  right: auto;
  left: 0;
}

.dropdown__menu--narrow {
  width: 12rem;
}

.dropdown__item {
  display: block;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background-color 0.15s ease;
}

.dropdown__item i {
  width: 1.25em;
}

.dropdown__item:hover {
  background-color: var(--color-border-soft);
}

.dropdown__item--danger {
  color: var(--color-problem);
}

.dropdown__item--selected {
  font-weight: var(--font-semibold);
  background-color: var(--color-gray-100);
}

/* Avatar */
.avatar {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-avatar-bg);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  cursor: pointer;
}

/* --- Forms --- */
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
}

.form-input {
  width: 100%;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-input-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

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

/* Input with inline button (e.g., username check) */
.input-with-button {
  display: flex;
  gap: var(--space-2);
}

.input-with-button .form-input {
  flex: 1;
}

.input-with-button .btn {
  flex-shrink: 0;
}

.form-hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.file-upload-link {
  color: var(--color-gray-500);
  transition: color 0.15s ease;
}

.file-upload-link:hover {
  color: var(--color-log);
  text-decoration: underline;
}

.checkbox {
  width: 1rem;
  height: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-gray-300);
  cursor: pointer;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-gray-700);
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-gray-700);
}

.radio-label input[type="radio"] {
  width: 1rem;
  height: 1rem;
  cursor: pointer;
}

.form-input--sm {
  padding: var(--space-2);
  font-size: var(--text-sm);
}

.form-textarea {
  min-height: 200px;
  resize: vertical;
  padding: var(--space-3);
}

.form-field {
  margin-bottom: var(--space-3);
}

/* Autocomplete dropdown */
.autocomplete {
  position: relative;
}

.autocomplete__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-surface);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 16rem;
  overflow-y: auto;
  margin-top: var(--space-1);
}

.autocomplete__item {
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
}

.autocomplete__item:hover,
.autocomplete__item-active {
  background-color: var(--color-gray-100);
}

.autocomplete__item:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.autocomplete__item:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.autocomplete__item:only-child {
  border-radius: var(--radius-md);
}

/* Media grid - thumbnail gallery for detail pages */
.media-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.media-grid__item {
  position: relative;
}

.media-grid__item img,
.media-grid__item video {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.media-grid__status {
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.media-grid__status--error {
  color: var(--color-problem);
}

.media-grid__delete {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  opacity: 0;
  transition: opacity 0.15s;
}

.media-grid__item:hover .media-grid__delete {
  opacity: 1;
}

.form-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Form sections (fieldsets) */
.form-section {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin: 0;
}

.form-section legend {
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  padding: 0 var(--space-2);
  margin-left: calc(-1 * var(--space-2));
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-gray-200);
}

.form-row-mobile {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-gray-200);
}

.file-preview-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-2);
}

.file-preview {
  position: relative;
}

.file-preview__thumb {
  width: 3.5rem;
  height: 3.5rem;
  background-color: var(--color-gray-200);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-preview__remove {
  position: absolute;
  top: -0.25rem;
  right: -0.25rem;
  width: 1rem;
  height: 1rem;
  background-color: var(--color-problem);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.file-preview:hover .file-preview__remove {
  opacity: 1;
}

/* Sidebar cards (for related content: machines, problems, parts requests) */
.sidebar-card {
  display: block;
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.sidebar-card--problem {
  background-color: var(--color-problem-light-bg);
  border: 1px solid var(--color-problem-light-border);
}

.sidebar-card--neutral {
  border: 1px solid var(--color-gray-300);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.sidebar-card--neutral:hover {
  background-color: var(--color-gray-100);
  border-color: var(--color-gray-400);
}

.sidebar-card--problem:hover {
  background-color: var(--color-problem-light-bg-hover);
}

.sidebar-card__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

.sidebar-card__header--problem {
  color: var(--color-problem);
}

.sidebar-card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-700);
  margin-top: var(--space-1);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-card__meta {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

.sidebar-card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-4);
}

.timeline__line {
  position: absolute;
  left: var(--space-5);
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border-soft);
  z-index: 0;
}

.timeline__entry {
  position: relative;
  z-index: 10;
  margin-bottom: var(--space-6);
}

.timeline__entry-inner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.timeline__icon {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: white;
  font-size: var(--text-xs);
  margin-top: var(--space-1);
  box-shadow: var(--shadow-sm);
  border: 2px solid white;
}

.timeline__icon--log {
  background-color: var(--color-log);
}

.timeline__icon--problem {
  background-color: var(--color-problem);
}

.timeline__content {
  flex: 1;
  min-width: 0;
}

.timeline__card {
  padding: var(--space-3);
  border-radius: var(--radius-lg);
}

.timeline__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-1);
}

.timeline__title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

.timeline__title--log {
  color: var(--color-log);
}

.timeline__title--problem {
  color: var(--color-problem);
}

.timeline__meta {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/*
 * Timeline card has multiple clickable sections:
 *   - timeline__card-link: header (title, meta)
 *   - timeline__media-link: media grid thumbnails
 *   - timeline__snippet-link: optional snippet at bottom
 *
 * The body (timeline__body) is NOT clickable because it contains markdown
 * which may include URLs, and nesting anchors is invalid HTML.
 */
.timeline__body {
  font-size: var(--text-sm);
  color: var(--color-gray-800);
}

.timeline__card-link,
.timeline__media-link {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: var(--space-3);
  margin: calc(-1 * var(--space-3));
  margin-bottom: 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card--log .timeline__card-link:hover,
.card--log .timeline__media-link:hover {
  background-color: var(--color-log-light-bg-hover);
}

.card--problem .timeline__card-link:hover,
.card--problem .timeline__media-link:hover {
  background-color: var(--color-problem-light-bg-hover);
}

/* When there's no snippet link, round all corners */
.timeline__card-link:last-child {
  margin-bottom: calc(-1 * var(--space-3));
  border-radius: var(--radius-lg);
}

/* Media link sits in middle of card, different positioning than card-link */
.timeline__media-link {
  padding: var(--space-2) var(--space-3);
  margin: 0 calc(-1 * var(--space-3));
  border-radius: 0;
}

.timeline__media-link:last-child {
  margin-bottom: calc(-1 * var(--space-3));
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.timeline__snippet-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: var(--space-2) var(--space-3);
  margin: 0 calc(-1 * var(--space-3)) calc(-1 * var(--space-3));
  border-top: 1px solid var(--color-border-soft);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  text-decoration: none;
  color: inherit;
  font-size: var(--text-sm);
  line-height: 1.3;
  overflow: hidden;
  white-space: nowrap;
}

.card--log .timeline__snippet-link:hover {
  background-color: var(--color-log-light-bg-hover);
}

.card--problem .timeline__snippet-link:hover {
  background-color: var(--color-problem-light-bg-hover);
}

.timeline__snippet-link .snippet-label {
  font-weight: var(--font-semibold);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  white-space: nowrap;
  flex-shrink: 0;
  font-size: var(--text-xs);
}

.timeline__snippet-link .snippet-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-muted);
  flex: 1;
  font-size: var(--text-xs);
}

/* Snippet row (linked problem/log preview) */
.snippet-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding-top: var(--space-2);
  margin-top: var(--space-1);
  border-top: 1px solid var(--color-border-soft);
  font-size: var(--text-sm);
  line-height: 1.3;
  width: 100%;
  overflow: hidden;
  white-space: nowrap;
}

.snippet-label {
  font-weight: var(--font-semibold);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  white-space: nowrap;
  flex-shrink: 0;
  font-size: var(--text-xs);
}

.snippet-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-muted);
  flex: 1;
  font-size: var(--text-xs);
}

/* --- Machine List & Cards --- */
.machine-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.machine-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.machine-card__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  text-decoration: none;
  color: inherit;
}

.machine-card__link:hover {
  background-color: var(--color-gray-100);
}

.machine-card__title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.machine-card__pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.machine-card__actions {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  display: flex;
  gap: var(--space-2);
}

.machine-card__btn-text--short,
.machine-card__btn-text--long {
  display: none;
}

@media (min-width: 640px) {
  .machine-card__btn-text--short {
    display: inline;
  }
}

@media (min-width: 900px) {
  .machine-card__btn-text--short {
    display: none;
  }

  .machine-card__btn-text--long {
    display: inline;
  }
}

.machine-card__problem {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-border-soft);
  text-decoration: none;
  color: inherit;
}

.machine-card__problem:hover {
  background-color: var(--color-gray-100);
}

/* --- Terminal List & Cards --- */
.terminal-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.terminal-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}

.terminal-card__info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.terminal-card__name {
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.terminal-card__actions {
  display: flex;
  gap: var(--space-2);
}

/* --- Sidebar --- */
.sidebar__section {
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-soft);
}

.sidebar__section:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.sidebar__label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.sidebar__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-gray-800);
}

.sidebar__subtitle {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

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

.sidebar__link:hover {
  color: var(--color-log);
}

.sidebar__list {
  list-style: disc;
  margin: 0;
  padding-left: var(--space-4);
}

.sidebar__list li {
  margin-bottom: var(--space-1);
}

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

.sidebar__list a:hover {
  color: var(--color-log);
}

/* --- Section Header --- */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.section-header__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

/* --- Log Entry List (for problem report detail) --- */
.log-entry-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.log-entry-meta {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-4);
}

.breadcrumbs__link {
  color: var(--color-gray-500);
  transition: color 0.15s ease;
}

.breadcrumbs__link:hover {
  color: var(--color-accent);
}

.breadcrumbs__current {
  font-weight: var(--font-semibold);
  color: var(--color-gray-700);
}

/* --- Filter Bar --- */
.filter-bar {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.filter-bar__filters {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-1);
  flex-shrink: 0;
}

.filter-bar__search {
  position: relative;
  flex: 1;
  min-width: 0;
}

.filter-bar__search-input {
  width: 100%;
  padding-left: 2rem;
  padding-right: var(--space-3);
  padding-top: var(--space-1-5);
  padding-bottom: var(--space-1-5);
  font-size: var(--text-sm);
  border: 1px solid var(--color-gray-300);
  border-radius: 0.5rem;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: all 0.15s ease;
  color: var(--color-text-primary);
}

.filter-bar__search-input::placeholder {
  color: var(--color-gray-400);
}

.filter-bar__search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

.filter-bar__search-icon {
  position: absolute;
  left: var(--space-2-5);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: var(--text-xs);
}

.filter-bar__search--full {
  width: 100%;
}

/* --- Markdown Content --- */
.markdown-content {
  color: var(--color-text-primary);
}

.markdown-content p {
  margin-bottom: var(--space-2);
}

.markdown-content ul,
.markdown-content ol {
  padding-left: var(--space-5);
  margin-bottom: var(--space-2);
}

.markdown-content ul {
  list-style: disc;
}

.markdown-content ol {
  list-style: decimal;
}

.markdown-content ul ul {
  list-style: circle;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-weight: var(--font-semibold);
}

.markdown-content h1 { font-size: var(--text-xl); }
.markdown-content h2 { font-size: var(--text-lg); }
.markdown-content h3 { font-size: var(--text-base); }
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 { font-size: var(--text-sm); }

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child,
.markdown-content h4:first-child,
.markdown-content h5:first-child,
.markdown-content h6:first-child {
  margin-top: 0;
}

.markdown-content--compact p,
.markdown-content--compact ul,
.markdown-content--compact ol,
.markdown-content--compact h1,
.markdown-content--compact h2,
.markdown-content--compact h3,
.markdown-content--compact h4,
.markdown-content--compact h5,
.markdown-content--compact h6 {
  margin-bottom: var(--space-1-5);
}

.markdown-content:last-child p:last-child,
.markdown-content:last-child ul:last-child,
.markdown-content:last-child ol:last-child,
.markdown-content:last-child h1:last-child,
.markdown-content:last-child h2:last-child,
.markdown-content:last-child h3:last-child,
.markdown-content:last-child h4:last-child,
.markdown-content:last-child h5:last-child,
.markdown-content:last-child h6:last-child {
  margin-bottom: 0;
}

.markdown-content a {
  color: var(--color-link);
  text-decoration: none;
}

.markdown-content a:hover {
  text-decoration: underline;
}

/* --- Stats Grid --- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.stat {
  text-align: center;
}

.stat__value {
  display: block;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1.2;
}

.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Mobile Action Buttons --- */
.mobile-actions {
  display: flex;
  align-items: stretch;
  gap: var(--space-2);
}

.mobile-actions > .btn {
  flex: 1;
  padding: var(--space-1-5) var(--space-3);
}

.mobile-actions > .dropdown {
  display: flex;
}

/* ========================================
   UTILITIES
   Semantic classes preferred over numeric
   ======================================== */

.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Text colors */
.text-log {
  color: var(--color-log);
}

.text-problem {
  color: var(--color-problem);
}

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

.text-center {
  text-align: center;
}

.text-danger {
  color: var(--color-problem);
}

.text-success {
  color: var(--color-success);
}

/* Username availability status (register page) */
.available {
  color: var(--color-success);
}

.unavailable {
  color: var(--color-problem);
}

/* Font weights */
.font-semibold {
  font-weight: var(--font-semibold);
}

.font-bold {
  font-weight: var(--font-bold);
}

/* Flex utilities */
.flex {
  display: flex;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.flex-1 {
  flex: 1;
}

.shrink-0 {
  flex-shrink: 0;
}

/* Border */
.border-t {
  border-top: 1px solid var(--color-gray-200);
}

/* Line clamp */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Semantic helpers */
.meta {
  font-size: var(--text-xs);
}

.body-small {
  font-size: var(--text-sm);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.stack-tight {
  display: flex;
  gap: var(--space-2);
}

.stack-column {
  flex-direction: column;
}

.space-below-sm { margin-bottom: var(--space-2); }
.space-below-md { margin-bottom: var(--space-3); }
.space-below-lg { margin-bottom: var(--space-4); }
.space-above-sm { margin-top: var(--space-2); }
.space-above-md { margin-top: var(--space-3); }
.space-above-lg { margin-top: var(--space-4); }
.space-right-xs { margin-right: var(--space-1); }
.space-right-sm { margin-right: var(--space-2); }

/* ========================================
   RESPONSIVE OVERRIDES (mobile-first)
   ======================================== */

/* Desktop nav hidden on mobile */
.nav--desktop {
  display: none;
}

/* --- Small screens and up (640px+) --- */
@media (min-width: 640px) {
  .filter-bar {
    flex-direction: row;
    align-items: center;
  }
}

/* --- Tablet and up (768px+) --- */
@media (min-width: 768px) {
  .nav--desktop {
    display: flex;
  }

  .nav--mobile {
    display: none;
  }

  .breadcrumbs--responsive {
    font-size: var(--text-base);
  }
}

/* --- Desktop (1024px+) --- */
@media (min-width: 1024px) {
  .main-content {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }

  .two-column {
    flex-direction: row;
  }

  .two-column__sidebar {
    display: block;
    width: 18rem;
    flex-shrink: 0;
    order: 2;
  }

  .two-column__main {
    order: 1;
  }

  .sidebar--sticky {
    position: sticky;
    top: 5rem;
  }

  .mobile-actions {
    display: none;
  }

  .form-row-mobile {
    display: none;
  }
}

/* ========================================
   PUBLIC/MINIMAL LAYOUT
   For public-facing pages (QR scan landing)
   ======================================== */

.header-minimal {
  padding: var(--space-4) var(--space-6);
}

.header-minimal__content {
  max-width: 32rem;
  margin: 0 auto;
}

.main-minimal {
  max-width: 32rem;
  margin: 0 auto;
  padding: var(--space-6);
}

.footer-minimal {
  text-align: center;
  padding: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* Flex layout for minimal pages - pushes footer to bottom, enables vertical centering */
.body-minimal {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.body-minimal .main-minimal {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.centered-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ========================================
   HISTORY LINK
   Positioned in sidebar top-right corner
   ======================================== */

.history-link {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.history-link:hover {
  color: var(--color-accent);
}

/* Hide on mobile */
@media (max-width: 768px) {
  .history-link {
    display: none;
  }
}