/* HandoffHQ Design System */
:root {
  --primary: #0891b2;
  --primary-dark: #0e7490;
  --primary-light: #e0f2fe;
  --primary-lighter: #f0f9ff;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --sidebar-width: 240px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
  --transition: 0.18s ease;
}

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

html { font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* ---- App Shell ---- */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--text-primary);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-logo {
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.sidebar-logo-tagline {
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  margin-top: 2px;
}

.sidebar-nav {
  padding: 16px 0;
  flex: 1;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: rgba(255,255,255,0.65);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
  color: #fff;
  background: rgba(255,255,255,0.06);
}

.sidebar-nav a.active {
  color: var(--accent);
  background: rgba(6,182,212,0.1);
  border-left-color: var(--accent);
}

.sidebar-nav .nav-icon {
  width: 18px;
  text-align: center;
  font-size: 16px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}

/* ---- Main Content ---- */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.page-body {
  padding: 32px;
  flex: 1;
}

/* ---- Cards ---- */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

/* ---- Stats Grid ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.stat-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.stat-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-secondary {
  background: var(--border-light);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--border); color: var(--text-primary); }

.btn-danger {
  background: #fee2e2;
  color: var(--danger);
}
.btn-danger:hover { background: var(--danger); color: #fff; }

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

/* ---- Forms ---- */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-white);
  transition: border-color var(--transition);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(8,145,178,0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ---- Handover List ---- */
.handover-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.handover-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.handover-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.handover-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}

.handover-info {
  flex: 1;
}

.handover-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.handover-meta {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.handover-progress-wrap {
  width: 140px;
  flex-shrink: 0;
}

.handover-progress-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
  display: flex;
  justify-content: space-between;
}

.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 3px;
  transition: width 0.4s ease;
}

.progress-fill.complete { background: var(--success); }

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-in-progress {
  background: #fef3c7;
  color: #92400e;
}

.badge-completed {
  background: #d1fae5;
  color: #065f46;
}

.badge-archived {
  background: var(--border-light);
  color: var(--text-muted);
}

/* ---- Accordion (Handover Detail) ---- */
.accordion-section {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  overflow: hidden;
}

.accordion-header {
  padding: 18px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  user-select: none;
  background: var(--bg-white);
  transition: background var(--transition);
}

.accordion-header:hover { background: var(--bg); }

.accordion-chevron {
  font-size: 12px;
  color: var(--text-muted);
  transition: transform 0.2s;
  margin-left: auto;
}

.accordion-header.open .accordion-chevron {
  transform: rotate(180deg);
}

.accordion-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
  color: var(--text-muted);
}

.accordion-check.done {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.accordion-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.accordion-progress-text {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
  margin-right: 8px;
}

.accordion-body {
  padding: 0 24px 24px;
  display: none;
}

.accordion-body.open {
  display: block;
}

.accordion-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  padding-top: 4px;
}

.question-item {
  margin-bottom: 20px;
}

.question-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.question-required {
  color: var(--danger);
  margin-left: 3px;
}

.save-indicator {
  font-size: 12px;
  color: var(--success);
  display: none;
  margin-top: 4px;
}

/* ---- Side Panels ---- */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  align-items: start;
}

.side-panel {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.side-panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.side-panel-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.side-panel-body {
  padding: 16px 20px;
}

.contact-card {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
}

.contact-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.contact-role {
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 4px;
}

.contact-info {
  font-size: 12px;
  color: var(--text-secondary);
}

.system-row {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 13px;
}

.system-row:last-child { border-bottom: none; }

.system-name {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.system-meta {
  color: var(--text-secondary);
  font-size: 12px;
}

/* ---- Filters ---- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filter-select {
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-white);
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  border-color: var(--primary);
}

/* ---- Modals ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  backdrop-filter: blur(2px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 17px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 20px;
  color: var(--text-muted);
  line-height: 1;
  padding: 2px;
}

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

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ---- Empty State ---- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.empty-state-text {
  font-size: 14px;
  margin-bottom: 24px;
}

/* ---- Top Progress Bar (handover detail) ---- */
.top-progress {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 12px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.top-progress-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.top-progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.top-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  transition: width 0.5s ease;
}

.top-progress-pct {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  min-width: 40px;
  text-align: right;
}

/* ---- Landing Page ---- */
.landing-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.landing-logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.landing-nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.landing-nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.hero {
  padding: 120px 5% 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--primary-lighter) 0%, #fff 100%);
}

.hero-eyebrow {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title span { color: var(--primary); }

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.section {
  padding: 80px 5%;
}

.section-alt {
  background: var(--bg);
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.section-sub {
  text-align: center;
  color: var(--text-secondary);
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto 56px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 860px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-white);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}

.pricing-card.featured {
  border-color: var(--primary);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
}

.pricing-plan {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.pricing-price {
  font-size: 48px;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 4px;
}

.pricing-price sup {
  font-size: 24px;
  font-weight: 700;
  vertical-align: super;
  letter-spacing: 0;
}

.pricing-period {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  text-align: left;
}

.pricing-features li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border-light);
}

.pricing-features li:last-child { border-bottom: none; }

.pricing-features li::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
  flex-shrink: 0;
}

.cta-section {
  background: linear-gradient(135deg, var(--text-primary), #1e3a5f);
  color: #fff;
  text-align: center;
  padding: 80px 5%;
}

.cta-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.cta-sub {
  font-size: 18px;
  opacity: 0.75;
  max-width: 500px;
  margin: 0 auto 36px;
}

.landing-footer {
  background: var(--text-primary);
  color: rgba(255,255,255,0.4);
  text-align: center;
  padding: 24px;
  font-size: 13px;
}

/* ---- Settings Page ---- */
.api-key-display {
  font-family: 'SFMono-Regular', 'Fira Code', monospace;
  font-size: 14px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.api-key-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---- Alerts ---- */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* ---- Loading ---- */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .detail-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
  }
  .main-content {
    margin-left: 0;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .page-body { padding: 16px; }
  .page-header { padding: 16px; }
  .top-progress { padding: 12px 16px; }
}

/* ---- Toast Notification ---- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.toast.visible {
  transform: translateY(0);
  opacity: 1;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }