/* =========================================================
   GoodBuddy Control Center — styles.css
   ========================================================= */

:root {
  color-scheme: light;

  --color-bg: #f4f6fb;
  --color-bg-elevated: #ffffff;
  --color-bg-header: rgba(255, 255, 255, 0.92);
  --color-border: #dde3ee;
  --color-text: #1c2333;
  --color-text-muted: #5a6479;
  --color-primary: #3a5bfd;
  --color-primary-hover: #2a45d6;
  --color-primary-contrast: #ffffff;
  --color-success: #12a454;
  --color-success-bg: #e4f8ec;
  --color-warning: #b8860b;
  --color-warning-bg: #fbf1d9;
  --color-info: #2a6df4;
  --color-info-bg: #e6edff;
  --color-danger: #d43b3b;
  --color-danger-bg: #fdeaea;
  --shadow-sm: 0 1px 2px rgba(20, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 26, 46, 0.08);
  --shadow-lg: 0 20px 48px rgba(20, 26, 46, 0.16);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition-fast: 150ms ease;
  --transition-base: 220ms ease;
  --focus-ring: 0 0 0 3px rgba(58, 91, 253, 0.35);
  --max-width: 1180px;
}

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

  --color-bg: #0f1220;
  --color-bg-elevated: #1a1f33;
  --color-bg-header: rgba(15, 18, 32, 0.9);
  --color-border: #2b3150;
  --color-text: #eef1fb;
  --color-text-muted: #a3aac4;
  --color-primary: #7b93ff;
  --color-primary-hover: #93a7ff;
  --color-primary-contrast: #0f1220;
  --color-success: #35d17d;
  --color-success-bg: rgba(53, 209, 125, 0.14);
  --color-warning: #e8c15b;
  --color-warning-bg: rgba(232, 193, 91, 0.14);
  --color-info: #7ea2ff;
  --color-info-bg: rgba(126, 162, 255, 0.14);
  --color-danger: #f27272;
  --color-danger-bg: rgba(242, 114, 114, 0.14);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.55);
  --focus-ring: 0 0 0 3px rgba(123, 147, 255, 0.45);
}

/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui,
    -apple-system, sans-serif;
  line-height: 1.6;
  transition: background-color var(--transition-base), color var(--transition-base);
}

h1,
h2,
h3,
p {
  margin: 0 0 0.5em;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

button {
  font-family: inherit;
}

input,
select {
  font-family: inherit;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- Accessibility helpers ---------- */
.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;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

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

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-header);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), #7d5bfd);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
}

.primary-nav {
  flex: 1;
}

.primary-nav ul {
  display: flex;
  gap: 1.5rem;
}

.primary-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 600;
  padding: 0.4rem 0.2rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

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

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle:hover {
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0.5rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
}

/* ---------- Hero ---------- */
.hero {
  padding: 3rem 0 2.5rem;
}

.hero-subtitle {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 46ch;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 1.75rem;
}

.metric-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.metric-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.metric-label {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.metric-value {
  font-size: 2rem;
  font-weight: 800;
}

.metric-delta {
  font-size: 0.82rem;
  font-weight: 700;
}

.metric-delta--up {
  color: var(--color-success);
}

.metric-delta--down {
  color: var(--color-danger);
}

/* ---------- Sections generic ---------- */
.agents,
.tasks,
.activity {
  padding: 2.5rem 0;
}

.agents h2,
.tasks h2,
.activity h2 {
  font-size: 1.5rem;
}

/* ---------- Agent grid ---------- */
.agent-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 1.25rem;
}

.agent-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.agent-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.agent-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.agent-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-info-bg);
  color: var(--color-info);
  font-weight: 800;
  font-size: 0.85rem;
}

.agent-name {
  font-size: 1.05rem;
}

.agent-meta {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin-bottom: 0.2rem;
}

/* ---------- Status badges ---------- */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.status-running {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.status-completed {
  background: var(--color-success-bg);
  color: var(--color-success);
}

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

.status-maintenance {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

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

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

/* ---------- Tasks ---------- */
.tasks-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.filter-group {
  display: flex;
  gap: 0.6rem;
  margin: 1.25rem 0 1rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text-muted);
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-contrast);
}

.task-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.task-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.task-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.task-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.task-title {
  font-size: 1rem;
  word-break: break-word;
}

.task-meta {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.15rem;
}

.empty-state {
  color: var(--color-text-muted);
  font-style: italic;
  padding: 1rem 0;
}

/* ---------- Activity ---------- */
.search-field {
  margin: 1.25rem 0;
}

.search-input {
  width: 100%;
  max-width: 420px;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-size: 0.95rem;
}

.activity-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.activity-item {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  padding: 0.75rem 1rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.activity-time {
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
  font-weight: 700;
  font-size: 0.85rem;
  min-width: 3.2rem;
}

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

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0 2.5rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-marker {
  opacity: 0.55;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 24, 0.5);
  z-index: 200;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(480px, calc(100vw - 2rem));
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 201;
  border: 1px solid var(--color-border);
}

.modal[hidden],
.modal-overlay[hidden] {
  display: none;
}

.modal-form {
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
  font-size: 1.15rem;
  margin: 0;
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.modal-close:hover {
  color: var(--color-danger);
}

.modal-body {
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field label {
  font-weight: 700;
  font-size: 0.9rem;
}

.form-field input,
.form-field select {
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.95rem;
}

.form-error {
  color: var(--color-danger);
  font-size: 0.85rem;
  font-weight: 700;
  margin: 0;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1.1rem 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    display: none;
  }

  .primary-nav.is-open {
    display: block;
  }

  .primary-nav ul {
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 0.25rem;
  }

  .primary-nav a {
    display: block;
    padding: 0.6rem 0.2rem;
  }

  .header-inner {
    flex-wrap: wrap;
    position: relative;
  }

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

@media (max-width: 560px) {
  .metrics {
    grid-template-columns: 1fr;
  }

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

  .tasks-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  html {
    scroll-behavior: auto;
  }
}