/* ServiceFlow Design System
 * IT Operations Platform
 * Copyright (c) 2026 Richard Stainforth
 */

/* ========================================
   CSS VARIABLES
   ======================================== */

:root {
  /* Brand Colors */
  --color-accent-teal: #00D4AA;
  --color-accent-blue: #3B82F6;
  --color-accent-purple: #A855F7;
  --color-accent-amber: #F59E0B;

  /* Backgrounds */
  --color-bg-primary: #0F1419;
  --color-bg-surface: #1C2631;
  --color-bg-elevated: #232E3A;
  --color-bg-divider: #2A3542;

  /* Text */
  --color-text-primary: #E7E9EA;
  --color-text-secondary: #8B98A5;
  --color-text-disabled: #5A6675;

  /* Status Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;

  /* Gradient */
  --gradient-flow: linear-gradient(135deg, #00D4AA, #3B82F6, #A855F7, #F59E0B);

  /* Component-specific */
  --bridge-primary: #3B82F6;
  --engine-primary: #00D4AA;
  --agent-primary: #A855F7;
  --guard-primary: #F59E0B;

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
}

/* ========================================
   RESET
   ======================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

/* ========================================
   BODY
   ======================================== */

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  min-height: 100vh;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

h5 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent-teal);
  text-decoration: underline;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

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

.btn-primary {
  background: var(--gradient-flow);
  background-size: 200% 200%;
  color: var(--color-bg-primary);
  border: none;
}

.btn-primary:hover:not(:disabled) {
  background-position: 100% 100%;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 212, 170, 0.3);
}

.btn-secondary {
  background-color: var(--color-bg-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-bg-divider);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-bg-divider);
  border-color: var(--color-accent-teal);
}

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

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

/* ========================================
   CARDS
   ======================================== */

.card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-bg-divider);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.2s ease;
}

.card:hover {
  border-color: var(--color-bg-elevated);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.card-header {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-bg-divider);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0;
}

.card-body {
  color: var(--color-text-secondary);
}

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

input,
select,
textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-bg-divider);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent-teal);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

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

input:disabled,
select:disabled,
textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238B98A5' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-sm) center;
  padding-right: var(--spacing-xl);
}

textarea {
  min-height: 100px;
  resize: vertical;
}

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

/* ========================================
   TABLES
   ======================================== */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table th,
.table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-bg-divider);
}

.table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-elevated);
}

.table tbody tr:nth-child(even) {
  background-color: var(--color-bg-surface);
}

.table tbody tr:nth-child(odd) {
  background-color: var(--color-bg-elevated);
}

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

/* ========================================
   STATUS BADGES
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-elevated);
  color: var(--color-text-secondary);
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgba(239, 68, 68, 0.15);
  color: var(--color-error);
}

.badge-info {
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--color-info);
}

/* ========================================
   SIDEBAR NAVIGATION
   ======================================== */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background-color: var(--color-bg-surface);
  border-right: 1px solid var(--color-bg-divider);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-header {
  margin-bottom: var(--spacing-xl);
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.nav-item:hover {
  background-color: var(--color-bg-elevated);
  color: var(--color-text-primary);
  text-decoration: none;
}

.nav-item.active {
  background-color: var(--color-bg-elevated);
  color: var(--color-accent-teal);
  font-weight: 500;
}

.nav-item .icon {
  width: 20px;
  height: 20px;
  opacity: 0.7;
}

.nav-item.active .icon {
  opacity: 1;
}

/* ========================================
   HEADER
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 260px;
  right: 0;
  height: 64px;
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-bg-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  z-index: 99;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.logo-icon {
  width: 32px;
  height: 32px;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--gradient-flow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-bg-primary);
}

.user-info {
  text-align: right;
}

.user-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.user-role {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ========================================
   STATS CARDS
   ======================================== */

.stat-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-bg-divider);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.stat-card.bridge .stat-value {
  color: var(--bridge-primary);
}

.stat-card.engine .stat-value {
  color: var(--engine-primary);
}

.stat-card.agent .stat-value {
  color: var(--agent-primary);
}

.stat-card.guard .stat-value {
  color: var(--guard-primary);
}

/* ========================================
   ACTIVITY FEED
   ======================================== */

.activity-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.activity-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.activity-item:hover {
  background-color: var(--color-bg-divider);
}

.activity-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-icon.bridge {
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--bridge-primary);
}

.activity-icon.engine {
  background-color: rgba(0, 212, 170, 0.15);
  color: var(--engine-primary);
}

.activity-icon.agent {
  background-color: rgba(168, 85, 247, 0.15);
  color: var(--agent-primary);
}

.activity-icon.guard {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--guard-primary);
}

.activity-content {
  flex: 1;
  min-width: 0;
}

.activity-event {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.activity-detail {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.activity-time {
  font-size: 0.75rem;
  color: var(--color-text-disabled);
  white-space: nowrap;
}

/* ========================================
   MAIN CONTENT AREA
   ======================================== */

.main-content {
  margin-left: 260px;
  margin-top: 64px;
  padding: var(--spacing-xl);
  min-height: calc(100vh - 64px);
}

/* ========================================
   UTILITIES
   ======================================== */

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

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

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

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

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

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex {
  display: flex;
}

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

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

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

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

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

/* Mobile: max-width 640px */
@media (max-width: 640px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

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

  .header {
    left: 0;
  }

  .main-content {
    margin-left: 0;
    padding: var(--spacing-md);
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .card {
    padding: var(--spacing-md);
  }

  .activity-item {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .activity-time {
    align-self: flex-start;
  }
}

/* Tablet: max-width 1024px */
@media (max-width: 1024px) {
  .sidebar {
    width: 220px;
  }

  .header {
    left: 220px;
  }

  .main-content {
    margin-left: 220px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop: min-width 1025px */
@media (min-width: 1025px) {
  .container {
    max-width: 1400px;
    margin: 0 auto;
  }
}