/**
 * RAG Assistant Design System
 * 
 * A consistent, accessible design system for the admin interface.
 * Designed for non-technical users with clear visual hierarchy.
 */

/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */
:root {
  /* Semantic Palette - Dark Theme */
  --theme-page: #171314;
  --theme-page-alt: #201a1d;
  --theme-shell: rgba(22, 18, 20, 0.92);
  --theme-shell-strong: #1c1718;
  --surface-1: #241d20;
  --surface-2: #2e2529;
  --surface-3: #3b3035;
  --surface-hover: #42363c;
  --surface-active: #4b3e45;

  --text-primary: #f5eee7;
  --text-secondary: #cbbfb3;
  --text-muted: #9c8e84;
  --text-disabled: #6a5f58;

  --border-strong: rgba(255, 243, 232, 0.14);
  --border-subtle: rgba(255, 243, 232, 0.08);
  --border-hover: rgba(255, 243, 232, 0.18);

  --accent-primary: #89d3ad;
  --accent-primary-hover: #9ce1bc;
  --accent-primary-subtle: rgba(137, 211, 173, 0.16);
  --accent-primary-ink: #12251c;

  --accent-secondary: #e1aa82;
  --accent-secondary-hover: #ebb995;
  --accent-secondary-subtle: rgba(225, 170, 130, 0.18);
  --accent-secondary-ink: #3e2416;

  --accent-info: #9ec5e8;
  --accent-info-hover: #b4d5f2;
  --accent-info-subtle: rgba(158, 197, 232, 0.16);

  --success: #8cd4a9;
  --warning: #efc376;
  --error: #ed9388;
  --info: #9ec5e8;

  --page-glow-1: rgba(137, 211, 173, 0.14);
  --page-glow-2: rgba(225, 170, 130, 0.12);

  /* Legacy Token Mappings */
  --color-bg: var(--theme-page);
  --color-bg-elevated: var(--theme-page-alt);
  --color-surface: var(--surface-1);
  --color-surface-hover: var(--surface-hover);
  --color-surface-active: var(--surface-active);

  --color-primary: var(--accent-primary);
  --color-primary-hover: var(--accent-primary-hover);
  --color-primary-subtle: var(--accent-primary-subtle);
  --color-primary-ink: var(--accent-primary-ink);

  --color-secondary: var(--accent-secondary);
  --color-secondary-hover: var(--accent-secondary-hover);
  --color-secondary-subtle: var(--accent-secondary-subtle);
  --color-secondary-ink: var(--accent-secondary-ink);

  --color-accent: var(--accent-info);
  --color-accent-hover: var(--accent-info-hover);
  --color-accent-subtle: var(--accent-info-subtle);

  --color-success: var(--success);
  --color-warning: var(--warning);
  --color-error: var(--error);
  --color-info: var(--info);

  --color-text: var(--text-primary);
  --color-border: var(--border-strong);
  
  /* Spacing Scale (rem-based) */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  
  /* Typography */
  --font-family: "Space Grotesk", "Avenir Next", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  --font-display: "M PLUS Rounded 1c", "Space Grotesk", "Avenir Next", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", Consolas, monospace;
  
  --text-xs: 0.75rem;   /* 12px */
  --text-sm: 0.875rem;  /* 14px */
  --text-base: 1rem;    /* 16px */
  --text-lg: 1.125rem;  /* 18px */
  --text-xl: 1.25rem;   /* 20px */
  --text-2xl: 1.5rem;   /* 24px */
  --text-3xl: 1.875rem; /* 30px */
  
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Border Radius */
  --radius-sm: 0.375rem;  /* 6px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 8px 24px rgba(10, 8, 9, 0.12);
  --shadow-md: 0 20px 44px rgba(10, 8, 9, 0.16);
  --shadow-lg: 0 28px 60px rgba(10, 8, 9, 0.24);
  --shadow-glow-primary: 0 0 24px rgba(137, 211, 173, 0.2);
  --shadow-glow-secondary: 0 0 24px rgba(225, 170, 130, 0.18);
  
  /* Layout */
  --sidebar-width: 16rem;
  --content-max-width: 78rem;
  --header-height: 4rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Z-index Scale */
  --z-mobile-menu: 98;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 99;
  --z-modal: 300;
  --z-tooltip: 400;
}

html[data-theme="light"] {
  --theme-page: #f5eee6;
  --theme-page-alt: #efe4d8;
  --theme-shell: rgba(250, 245, 239, 0.92);
  --theme-shell-strong: #f8f1ea;
  --surface-1: #fffaf4;
  --surface-2: #f7efe6;
  --surface-3: #efe2d3;
  --surface-hover: #ecdfd1;
  --surface-active: #e3d3c2;

  --text-primary: #201917;
  --text-secondary: #5b4c43;
  --text-muted: #7f7065;
  --text-disabled: #ab9d91;

  --border-strong: rgba(66, 49, 38, 0.14);
  --border-subtle: rgba(66, 49, 38, 0.09);
  --border-hover: rgba(66, 49, 38, 0.2);

  --accent-primary: #186b52;
  --accent-primary-hover: #0f5b45;
  --accent-primary-subtle: rgba(24, 107, 82, 0.1);
  --accent-primary-ink: #f2fbf6;

  --accent-secondary: #b86b3d;
  --accent-secondary-hover: #c87a49;
  --accent-secondary-subtle: rgba(184, 107, 61, 0.12);
  --accent-secondary-ink: #fff8f2;

  --accent-info: #3c74a8;
  --accent-info-hover: #4a86bf;
  --accent-info-subtle: rgba(60, 116, 168, 0.12);

  --success: #257a58;
  --warning: #9d6914;
  --error: #bf4b41;
  --info: #3c74a8;

  --page-glow-1: rgba(24, 107, 82, 0.04);
  --page-glow-2: rgba(184, 107, 61, 0.035);

  --shadow-sm: 0 8px 24px rgba(34, 23, 15, 0.08);
  --shadow-md: 0 18px 42px rgba(34, 23, 15, 0.12);
  --shadow-lg: 0 24px 56px rgba(34, 23, 15, 0.16);
  --shadow-glow-primary: 0 0 24px rgba(24, 107, 82, 0.16);
  --shadow-glow-secondary: 0 0 24px rgba(184, 107, 61, 0.14);
}

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

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

html[data-theme="dark"] {
  color-scheme: dark;
}

html[data-theme="light"] {
  color-scheme: light;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(42rem 24rem at -8% -6%, var(--page-glow-1), transparent 62%),
    radial-gradient(36rem 22rem at 108% -4%, var(--page-glow-2), transparent 60%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
  min-height: 100vh;
  transition:
    background-color var(--transition-slow),
    color var(--transition-slow);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Selection */
::selection {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ========================================
   App Layout (Sidebar + Content)
   ======================================== */
.app-layout {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%),
    linear-gradient(180deg, var(--surface-2) 0%, var(--theme-shell-strong) 100%);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 14, 15, 0.72);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: var(--z-overlay);
}

.sidebar-header {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
}

.app-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.app-link {text-decoration: none;}

.app-logo {
  width: 2.75rem;
  height: 2.75rem;
  object-fit: contain;
  flex-shrink: 0;
  max-width: 100%;
}

.app-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.app-name {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  font-size: var(--text-base);
  line-height: var(--leading-tight);
  letter-spacing: 0.05em;
}

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

/* Navigation Menu */
.nav-menu {
  flex: 1;
  padding: var(--space-4);
  overflow-y: auto;
}

.nav-section {
  margin-bottom: var(--space-6);
}

.nav-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-2);
}

.nav-list {
  list-style: none;
}

.nav-item {
  margin-bottom: var(--space-1);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

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

.nav-link.active {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border-color: rgba(255, 255, 255, 0.04);
}

.nav-icon {
  font-size: var(--text-base);
  width: 1.5rem;
  text-align: center;
}

.nav-text {
  flex: 1;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

.sidebar-footer-stack {
  display: grid;
  gap: var(--space-4);
}

.sidebar-footer-top {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--surface-1);
}

.sidebar-footer-top > div {
  min-width: 0;
}

.sidebar-footer-top .theme-toggle {
  width: 100%;
  justify-content: space-between;
}

.sidebar-footer-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.sidebar-footer-copy {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.user-avatar {
  width: 2rem;
  height: 2rem;
  background: var(--color-secondary-subtle);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--color-secondary);
  text-transform: uppercase;
}

.user-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-id {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 10rem;
}

.user-role {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.logout-form {
  display: flex;
}

/* Main Content */
.main-content {
  flex: 1;
  width: 100%;
  margin-left: var(--sidebar-width);
  padding: var(--space-8);
  max-width: calc(var(--content-max-width) + var(--sidebar-width));
}

.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding: var(--space-3) var(--space-4);
  background: var(--theme-shell);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  letter-spacing: 0.05em;
}

.mobile-brand-logo {
  width: 1.75rem;
  height: 1.75rem;
  object-fit: contain;
}

.mobile-nav-toggle {
  min-width: auto;
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
  margin-bottom: var(--space-8);
}

.page-header-split {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.page-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-2);
  letter-spacing: 0.01em;
  color: var(--text-primary);
}

.page-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 50ch;
  line-height: var(--leading-relaxed);
}

.page-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

.page-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

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

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
  letter-spacing: 0.02em;
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
  background-color: rgba(255, 255, 255, 0.02);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.card-footer-sticky {
  position: sticky;
  bottom: 0;
  z-index: 1;
  background-color: var(--theme-shell);
  backdrop-filter: blur(12px);
}

/* Card Variants */
.card-compact .card-header {
  padding: var(--space-4) var(--space-5);
}

.card-compact .card-body {
  padding: var(--space-5);
}

/* ========================================
   Form Elements
   ======================================== */
.form-section {
  margin-bottom: var(--space-8);
}

.form-section-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-subtle);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

.form-grid.single-column {
  grid-template-columns: 1fr;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-field.full-width {
  grid-column: 1 / -1;
}

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

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

.form-help {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.status-message {
  display: block;
  min-height: 1.25rem;
}

/* Input Base */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-disabled);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--border-hover);
}

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

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--color-surface-hover);
  color: var(--text-disabled);
  cursor: not-allowed;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(255, 143, 159, 0.15);
}

/* Input Sizes */
.form-input-sm,
.form-select-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.form-input-lg,
.form-select-lg {
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-base);
}

/* Select */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239a9397' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-8);
}

/* Textarea */
.form-textarea {
  resize: vertical;
  min-height: 6rem;
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
}

.form-checkbox input[type="checkbox"],
.form-radio input[type="radio"] {
  width: 1.125rem;
  height: 1.125rem;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-checkbox-label,
.form-radio-label {
  color: var(--text-secondary);
}

/* Checkbox Group */
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.checkbox-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.checkbox-pill:hover {
  border-color: var(--border-hover);
}

.checkbox-pill:has(input:checked) {
  background-color: var(--color-primary-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.checkbox-pill input[type="checkbox"] {
  display: none;
}

/* Toggle Switch */
.toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.toggle-input {
  position: relative;
  width: 2.75rem;
  height: 1.5rem;
  background-color: var(--color-surface-hover);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
}

.toggle-input::after {
  content: "";
  position: absolute;
  top: 0.125rem;
  left: 0.125rem;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast);
}

.toggle input[type="checkbox"] {
  display: none;
}

.toggle input[type="checkbox"]:checked + .toggle-input {
  background-color: var(--color-primary);
}

.toggle input[type="checkbox"]:checked + .toggle-input::after {
  transform: translateX(1.25rem);
  background-color: var(--color-primary-ink);
}

.toggle-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Input Group */
.input-group {
  display: flex;
}

.input-group .form-input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-group .btn {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  border-left: none;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

/* Button Variants */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-glow-primary);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-secondary-ink);
  border-color: var(--color-secondary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-hover);
  border-color: var(--color-secondary-hover);
  box-shadow: var(--shadow-glow-secondary);
}

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

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-surface-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

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

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-surface-hover);
  color: var(--text-primary);
}

.btn-danger {
  background-color: var(--color-error);
  color: var(--color-bg);
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  filter: brightness(1.1);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}

/* Icon Button */
.btn-icon {
  padding: var(--space-2);
  min-width: 2.25rem;
  min-height: 2.25rem;
}

.btn-icon.btn-sm {
  padding: var(--space-1);
  min-width: 1.75rem;
  min-height: 1.75rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  background: var(--surface-1);
  color: var(--text-primary);
  font: inherit;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--border-hover);
  background: var(--surface-2);
  transform: translateY(-1px);
}

.theme-toggle-track {
  position: relative;
  width: 2.6rem;
  height: 1.45rem;
  border-radius: var(--radius-full);
  background: var(--surface-3);
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.theme-toggle-thumb {
  position: absolute;
  top: 0.125rem;
  left: 0.125rem;
  width: 1.05rem;
  height: 1.05rem;
  border-radius: var(--radius-full);
  background: var(--color-secondary);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-base),
    background-color var(--transition-fast);
}

.theme-toggle[data-theme-current="dark"] .theme-toggle-thumb {
  transform: translateX(1.1rem);
  background: var(--color-primary);
}

.theme-toggle-label {
  white-space: nowrap;
}

.theme-toggle-compact {
  padding: var(--space-2);
}

.theme-toggle-compact .theme-toggle-label {
  display: none;
}

/* Button Group */
.btn-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ========================================
   Tables
   ======================================== */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.table th {
  font-weight: var(--font-semibold);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background-color: rgba(0, 0, 0, 0.2);
}

.table tbody tr:hover {
  background-color: var(--color-surface-hover);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* Table Variants */
.table-compact th,
.table-compact td {
  padding: var(--space-2) var(--space-3);
}

.recent-changes-list {
  display: none;
}

.recent-change-card {
  padding: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

.recent-change-card:first-child {
  border-top: none;
}

.recent-change-row {
  display: grid;
  gap: var(--space-1);
}

.recent-change-row + .recent-change-row {
  margin-top: var(--space-3);
}

.recent-change-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.recent-change-value {
  font-size: var(--text-sm);
  color: var(--text-primary);
  line-height: var(--leading-relaxed);
  overflow-wrap: anywhere;
}

.recent-change-code {
  justify-self: start;
  max-width: 100%;
  overflow-wrap: anywhere;
}

/* ========================================
   Badges & Status
   ======================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

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

.badge-warning {
  background-color: rgba(255, 211, 110, 0.12);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgba(255, 143, 159, 0.12);
  color: var(--color-error);
}

.badge-info {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

.badge-muted {
  background-color: var(--color-surface-hover);
  color: var(--text-muted);
}

.badge-dot::before {
  content: "";
  width: 0.375rem;
  height: 0.375rem;
  border-radius: var(--radius-full);
  background-color: currentColor;
}

/* Status Indicators */
.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.status-indicator::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: var(--radius-full);
}

.status-online::before {
  background-color: var(--color-success);
  box-shadow: 0 0 0 2px rgba(97, 229, 158, 0.3);
}

.status-offline::before {
  background-color: var(--text-disabled);
}

.status-warning::before {
  background-color: var(--color-warning);
}

/* ========================================
   Alerts & Messages
   ======================================== */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
}

.alert-icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-message {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* Alert Variants */
.alert-success {
  background-color: var(--color-primary-subtle);
  border: 1px solid rgba(97, 229, 158, 0.2);
}

.alert-success .alert-title {
  color: var(--color-primary);
}

.alert-warning {
  background-color: rgba(255, 211, 110, 0.08);
  border: 1px solid rgba(255, 211, 110, 0.2);
}

.alert-warning .alert-title {
  color: var(--color-warning);
}

.alert-error {
  background-color: rgba(255, 143, 159, 0.08);
  border: 1px solid rgba(255, 143, 159, 0.2);
}

.alert-error .alert-title {
  color: var(--color-error);
}

.alert-info {
  background-color: var(--color-accent-subtle);
  border: 1px solid rgba(139, 216, 255, 0.2);
}

.alert-info .alert-title {
  color: var(--color-accent);
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-state-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.empty-state-message {
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 40ch;
  margin: 0 auto;
}

/* ========================================
   KPI Cards
   ======================================== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  align-items: stretch;
}

.stack-list {
  display: grid;
  gap: var(--space-3);
}

.list-row,
.surface-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
}

.surface-row {
  flex-direction: column;
  justify-content: flex-start;
}

.surface-row-header {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.surface-row-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

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

.inline-form {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.status-stack {
  display: grid;
  gap: var(--space-3);
}

.status-stack > div {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.status-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.status-summary-item {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
}

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

.status-summary-value {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

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

.kpi-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.kpi-value.accent {
  color: var(--color-primary);
}

.kpi-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.page-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ========================================
   Login
   ======================================== */
.login-page {
  display: grid;
  place-items: center;
  padding: var(--space-6);
}

.login-shell {
  width: min(34rem, 100%);
}

.login-card {
  position: relative;
  overflow: hidden;
  padding: var(--space-6);
  border-radius: calc(var(--radius-xl) + 0.25rem);
  border: 1px solid var(--color-border);
  background:
    radial-gradient(circle at top left, var(--page-glow-1), transparent 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, transparent 100%),
    var(--surface-1);
  box-shadow: var(--shadow-lg);
}

.login-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.login-brand-lockup {
  display: grid;
  justify-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  text-align: center;
}

.login-logo {
  width: min(15rem, 70%);
  height: auto;
}

.login-copy {
  margin: 0 0 var(--space-5);
  color: var(--text-secondary);
  text-align: center;
  line-height: var(--leading-relaxed);
}

.login-form {
  display: grid;
  gap: var(--space-4);
}

.login-form .btn {
  width: 100%;
}

.login-status {
  min-height: 1.4rem;
  margin: 0;
  color: var(--color-error);
  font-size: var(--text-sm);
}

/* ========================================
   Overview
   ======================================== */
.overview-shell {
  display: grid;
  gap: var(--space-6);
}

.overview-hero {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: var(--space-3);
  align-items: stretch;
}

.overview-hero-card,
.overview-window-card {
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius-xl) + 0.15rem);
  box-shadow: var(--shadow-md);
}

.overview-hero-card {
  padding: var(--space-6);
  background: var(--surface-1);
}

.overview-hero-card .page-title {
  margin-top: var(--space-4);
}

.overview-hero-actions {
  margin-top: var(--space-5);
}

.overview-window-card {
  display: grid;
  align-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--surface-2);
}

.overview-window-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.overview-window-value {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.overview-window-copy {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.overview-kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.overview-kpi-grid .kpi-card {
  min-height: 100%;
}

.overview-main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.92fr);
  gap: var(--space-6);
  align-items: start;
}

.overview-column {
  display: grid;
  gap: var(--space-6);
}

.overview-card-muted {
  background: var(--surface-2);
}

.overview-list {
  display: grid;
  gap: var(--space-3);
}

.overview-list-item {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
}

.overview-list-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.overview-card-note {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.overview-recent-changes .card-header {
  padding-bottom: var(--space-4);
}

.overview-recent-changes .card-body {
  padding-top: var(--space-5);
}

/* ========================================
   Collapsible Sections
   ======================================== */
.details-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.details-item {
  border-bottom: 1px solid var(--border-subtle);
}

.details-item:last-child {
  border-bottom: none;
}

.details-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  cursor: pointer;
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast);
}

.details-summary:hover {
  background-color: var(--color-surface-hover);
}

.details-content {
  padding: var(--space-4);
  background-color: var(--surface-2);
}

/* ========================================
   Action Bar
   ======================================== */
.action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
}

.action-bar-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ========================================
   Preview Panel (for Slack previews)
   ======================================== */
.preview-panel {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.preview-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

.preview-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
}

.slack-preview {
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.slack-block {
  background-color: var(--color-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.slack-block:last-child {
  margin-bottom: 0;
}

.slack-block.context {
  background-color: transparent;
  border: none;
  padding: var(--space-2) 0;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.slack-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: var(--space-3);
}

.slack-field {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-elevated);
  padding: var(--space-2);
}

.slack-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.slack-image {
  width: 100%;
  max-height: 20rem;
  object-fit: contain;
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
}

/* ========================================
   Code & Monospace
   ======================================== */
code,
.code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--surface-2);
  border: 1px solid var(--border-subtle);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background-color: var(--color-bg);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  line-height: var(--leading-relaxed);
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* ========================================
   Utility Classes
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--text-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

.font-mono { font-family: var(--font-mono); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }

.card.is-busy {
  box-shadow: inset 0 0 0 1px var(--color-primary-subtle);
}

.wrap { flex-wrap: wrap; }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
  .main-content {
    padding: var(--space-6);
  }

  .page-header-split,
  .page-meta,
  .card-header,
  .card-footer,
  .action-bar {
    flex-wrap: wrap;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  .overview-hero,
  .overview-main-grid,
  .overview-kpi-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  body {
    overflow-x: hidden;
  }

  .sidebar {
    width: min(22rem, calc(100vw - 3rem));
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  body.sidebar-open .sidebar-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu {
    padding: var(--space-4);
  }

  .main-content {
    margin-left: 0;
    max-width: none;
    padding: var(--space-5);
  }

  .mobile-header {
    display: flex;
    position: sticky;
    top: var(--space-4);
    z-index: var(--z-mobile-menu);
  }
}

@media (max-width: 640px) {
  .sidebar-header {
    padding: var(--space-4);
  }

  .nav-menu {
    padding: var(--space-4);
  }

  .app-logo {
    width: 2.25rem;
    height: 2.25rem;
  }

  .nav-label {
    padding-left: 0;
    padding-right: 0;
  }

  .nav-list {
    display: grid;
    grid-template-columns: 1fr;
  }

  .nav-link {
    width: 100%;
  }

  .sidebar-footer {
    align-items: stretch;
    padding: var(--space-4);
  }

  .sidebar-footer-top {
    grid-template-columns: 1fr;
  }

  .user-info {
    width: 100%;
  }

  .logout-form,
  .logout-form .btn {
    width: 100%;
  }

  .main-content {
    padding: var(--space-4);
  }

  .mobile-header {
    top: var(--space-2);
    margin-bottom: var(--space-4);
    padding: var(--space-3);
  }
  
  .page-title {
    font-size: var(--text-2xl);
  }

  .page-description {
    font-size: var(--text-base);
  }

  .page-header {
    margin-bottom: var(--space-6);
  }

  .page-header-split,
  .page-meta,
  .card-header,
  .card-footer,
  .action-bar,
  .action-bar-group {
    flex-direction: column;
    align-items: stretch;
  }

  .card-header,
  .card-body,
  .card-footer {
    padding: var(--space-4);
  }

  .list-row,
  .surface-row,
  .surface-row-header,
  .inline-form,
  .overview-list-item-header {
    flex-direction: column;
    align-items: stretch;
  }

  .status-summary-grid {
    grid-template-columns: 1fr;
  }
  
  .kpi-grid {
    grid-template-columns: 1fr;
  }

  .login-page {
    padding: var(--space-4);
  }

  .login-card {
    padding: var(--space-5);
  }

  .login-topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .theme-toggle {
    justify-content: center;
  }
  
  .table-container {
    font-size: var(--text-xs);
  }

  .table th,
  .table td {
    padding: var(--space-2) var(--space-3);
  }

  .recent-changes-table {
    display: none;
  }

  .recent-changes-list {
    display: block;
  }

  .btn-group,
  .form-actions {
    width: 100%;
  }

  .btn-group .btn,
  .btn-group a,
  .form-actions .btn,
  .form-actions a,
  .action-bar .btn {
    flex: 1 1 100%;
  }

  .input-group {
    flex-direction: column;
  }

  .input-group .form-input,
  .input-group .btn {
    border-radius: var(--radius-md);
  }

  .input-group .btn {
    border-left: 1px solid var(--color-border);
  }
}

/* ========================================
   Animation
   ======================================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-0.5rem); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn var(--transition-base);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-tooltip);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  min-width: 20rem;
  animation: fadeIn var(--transition-fast);
}

.toast-success {
  border-color: var(--color-primary);
}

.toast-error {
  border-color: var(--color-error);
}


/* ========================================
   GIF Diagnostics Panel
   ======================================== */
.gif-status-panel {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.status-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

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

.status-value {
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

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

.status-badge.status-success {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

.status-badge.status-error {
  background-color: rgba(255, 143, 159, 0.15);
  color: var(--color-error);
}

.status-badge.status-muted {
  background-color: var(--color-surface-hover);
  color: var(--text-muted);
}

/* GIF Test Results */
.gif-test-results {
  background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.gif-test-success {
  border-color: var(--color-primary);
  background: linear-gradient(160deg, rgba(97, 229, 158, 0.05) 0%, var(--color-bg-elevated) 100%);
}

.gif-test-error {
  border-color: var(--color-error);
  background: linear-gradient(160deg, rgba(255, 143, 159, 0.05) 0%, var(--color-bg-elevated) 100%);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.result-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.result-item.full-width {
  grid-column: 1 / -1;
}

.result-label {
  color: var(--text-muted);
  flex-shrink: 0;
}

.result-value {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-primary);
  word-break: break-all;
}

.result-value.link {
  color: var(--color-accent);
  text-decoration: none;
}

.result-value.link:hover {
  text-decoration: underline;
}

.result-value.error {
  color: var(--color-error);
}

/* Responsive GIF diagnostics */
@media (max-width: 640px) {
  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
  }

  .toast {
    min-width: 0;
    width: 100%;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }
  
  .status-grid {
    grid-template-columns: 1fr;
  }
}