/* ============================================================
   Variables
   ============================================================ */
:root {
  --primary:        #004994;
  --primary-hover:  #003a7a;
  --primary-light:  #e8f0fa;
  --bg:             #f0f2f5;
  --card:           #ffffff;
  --text:           #1a1a2e;
  --text-muted:     #6b7280;
  --border:         #e5e7eb;
  --success:        #16a34a;
  --success-light:  #dcfce7;
  --danger:         #dc2626;
  --danger-light:   #fee2e2;
  --warning:        #d97706;
  --warning-light:  #fef3c7;
  --sidebar-w:      240px;
  --radius:         8px;
  --radius-sm:      5px;
  --shadow:         0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:      0 4px 12px rgba(0,0,0,.1);
  --font:           -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

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

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

h1, h2, h3, h4 { font-weight: 600; line-height: 1.25; }

/* ============================================================
   Layout helpers
   ============================================================ */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ============================================================
   Public header
   ============================================================ */
.public-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.public-header .logo {
  font-size: .9rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -.3px;
}

.public-header nav a {
  font-size: .875rem;
  color: var(--text-muted);
  margin-left: 20px;
}
.public-header nav a:hover { color: var(--text); text-decoration: none; }
.public-header nav .btn { margin-left: 12px; }

/* ============================================================
   App layout (sidebar)
   ============================================================ */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-logo {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo span {
  font-size: .85rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -.3px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: .875rem;
  font-weight: 500;
  margin-bottom: 2px;
  transition: background .15s, color .15s;
}
.sidebar-nav a:hover { background: var(--bg); color: var(--text); text-decoration: none; }
.sidebar-nav a.active { background: var(--primary-light); color: var(--primary); }
.sidebar-nav a svg { flex-shrink: 0; opacity: .7; }
.sidebar-nav a.active svg { opacity: 1; }

.sidebar-section-label {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 14px 12px 6px;
}

.sidebar-footer {
  padding: 14px 10px;
  border-top: 1px solid var(--border);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
}
.sidebar-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: .8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name { font-size: .82rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-user-email { font-size: .72rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-logout { font-size: .78rem; color: var(--text-muted); display: block; margin-top: 4px; padding: 4px 10px; }
.sidebar-logout:hover { color: var(--danger); }

.app-main {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.app-topbar h1 { font-size: 1rem; font-weight: 600; }

.app-content {
  padding: 28px 32px;
  flex: 1;
}

/* ============================================================
   Migration banner
   ============================================================ */
.migration-banner {
  background: var(--warning-light);
  border-bottom: 1px solid #fde68a;
  padding: 10px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: .875rem;
}
.migration-banner strong { color: var(--warning); }
.migration-banner form { margin-left: auto; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .15s, border-color .15s, color .15s;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

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

.btn-outline   { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); color: var(--primary); }

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

.btn-danger    { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; border-color: #b91c1c; color: #fff; }

.btn-danger-outline { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-danger-outline:hover { background: var(--danger-light); }

.btn-sm { padding: 5px 11px; font-size: .8rem; }
.btn-lg { padding: 11px 22px; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }

/* ============================================================
   Forms
   ============================================================ */
.form-group { margin-bottom: 18px; }

label {
  display: block;
  font-size: .825rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

input[type=text],
input[type=email],
input[type=password],
input[type=number],
input[type=time],
input[type=date],
input[type=url],
input[type=color],
select,
textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-family: var(--font);
  color: var(--text);
  background: var(--card);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
  -webkit-appearance: none;
}
input[type=color] { padding: 4px 8px; height: 38px; cursor: pointer; }

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,73,148,.12);
}

textarea { resize: vertical; min-height: 80px; }

.form-hint { font-size: .78rem; color: var(--text-muted); margin-top: 5px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

.checkbox-group { display: flex; align-items: center; gap: 10px; }
.checkbox-group input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }
.checkbox-group label { margin: 0; font-weight: 400; cursor: pointer; }

.form-section {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-top: 20px;
}
.form-section-title { font-size: .78rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 14px; }

/* ============================================================
   Alerts / Flash messages
   ============================================================ */
.alert {
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  margin-bottom: 18px;
  border: 1px solid transparent;
}
.alert-error   { background: var(--danger-light);  border-color: #fca5a5; color: #991b1b; }
.alert-success { background: var(--success-light); border-color: #86efac; color: #166534; }
.alert-info    { background: var(--primary-light);  border-color: #93c5fd; color: #1e40af; }

/* ============================================================
   Auth pages
   ============================================================ */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 24px;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 36px 36px 32px;
}
.auth-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -.3px;
  margin-bottom: 24px;
}
.auth-title { font-size: 1.25rem; margin-bottom: 6px; }
.auth-subtitle { font-size: .875rem; color: var(--text-muted); margin-bottom: 24px; }
.auth-footer { margin-top: 20px; text-align: center; font-size: .825rem; color: var(--text-muted); }

/* ============================================================
   Dashboard stats
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.stat-label { font-size: .78rem; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--text); line-height: 1.1; margin-top: 6px; }

/* ============================================================
   Appointment type cards
   ============================================================ */
.type-list { display: flex; flex-direction: column; gap: 12px; }

.type-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: stretch;
  overflow: hidden;
  transition: box-shadow .15s;
}
.type-card:hover { box-shadow: var(--shadow-md); }

.type-card-stripe { width: 5px; flex-shrink: 0; }

.type-card-body {
  flex: 1;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.type-card-info { flex: 1; min-width: 0; }
.type-card-title { font-size: .95rem; font-weight: 600; }
.type-card-meta { font-size: .8rem; color: var(--text-muted); margin-top: 3px; display: flex; gap: 14px; flex-wrap: wrap; }

.type-card-actions { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .02em;
}
.badge-public  { background: #dcfce7; color: #166534; }
.badge-private { background: var(--bg); color: var(--text-muted); border: 1px solid var(--border); }
.badge-active  { background: #dbeafe; color: #1e40af; }
.badge-inactive { background: var(--bg); color: var(--text-muted); }

/* ============================================================
   Page header
   ============================================================ */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.page-header h2 { font-size: 1.1rem; }
.page-header p  { font-size: .875rem; color: var(--text-muted); margin-top: 3px; }

/* ============================================================
   Table
   ============================================================ */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}
thead th {
  padding: 10px 14px;
  text-align: left;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--bg); }

/* ============================================================
   Availability editor
   ============================================================ */
.avail-grid { display: flex; flex-direction: column; gap: 0; }

.avail-day {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.avail-day:last-child { border-bottom: none; }

.avail-day-label {
  width: 100px;
  flex-shrink: 0;
  font-size: .875rem;
  font-weight: 500;
  padding-top: 8px;
}

.avail-slots { flex: 1; display: flex; flex-direction: column; gap: 8px; }

.avail-slot {
  display: flex;
  align-items: center;
  gap: 10px;
}
.avail-slot input[type=time] { width: 120px; }
.avail-slot-sep { font-size: .8rem; color: var(--text-muted); }

.btn-add-slot {
  font-size: .78rem;
  color: var(--primary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-top: 4px;
  font-family: var(--font);
}
.btn-add-slot:hover { text-decoration: underline; }

.btn-remove-slot {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 3px;
}
.btn-remove-slot:hover { background: var(--danger-light); color: var(--danger); }

/* ============================================================
   Booking page
   ============================================================ */
.booking-layout {
  min-height: 100vh;
  background: var(--bg);
  padding: 32px 16px;
}
.booking-card {
  max-width: 820px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.booking-header {
  padding: 28px 32px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.booking-color-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 4px;
}
.booking-header h1 { font-size: 1.2rem; }
.booking-header p  { font-size: .875rem; color: var(--text-muted); margin-top: 4px; }
.booking-header-meta { display: flex; gap: 16px; margin-top: 8px; flex-wrap: wrap; }
.booking-meta-item { font-size: .8rem; color: var(--text-muted); }
.booking-meta-item strong { color: var(--text); }

.booking-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 420px;
}
@media (max-width: 640px) { .booking-body { grid-template-columns: 1fr; } }

.booking-calendar {
  padding: 24px;
  border-right: 1px solid var(--border);
}
@media (max-width: 640px) { .booking-calendar { border-right: none; border-bottom: 1px solid var(--border); } }

.cal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.cal-nav-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 32px; height: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: background .12s;
}
.cal-nav-btn:hover { background: var(--bg); }
.cal-month-label { font-size: .9rem; font-weight: 600; }

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}
.cal-weekday {
  text-align: center;
  font-size: .7rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 4px 0 8px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.cal-day {
  text-align: center;
  padding: 7px 4px;
  border-radius: var(--radius-sm);
  font-size: .82rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .12s, color .12s;
}
.cal-day:hover:not(.cal-day-disabled):not(.cal-day-empty) { background: var(--primary-light); color: var(--primary); }
.cal-day.selected { background: var(--primary); color: #fff; border-color: var(--primary); }
.cal-day-disabled { color: var(--border); cursor: default; }
.cal-day-empty { cursor: default; }
.cal-day-today:not(.selected) { border-color: var(--primary); color: var(--primary); font-weight: 600; }

.booking-slots {
  padding: 24px;
  display: flex;
  flex-direction: column;
}
.booking-slots h3 { font-size: .875rem; font-weight: 600; margin-bottom: 14px; color: var(--text-muted); }

.slots-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex: 1;
  overflow-y: auto;
  max-height: 320px;
}
.slot-btn {
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  cursor: pointer;
  font-size: .875rem;
  font-family: var(--font);
  color: var(--text);
  text-align: left;
  transition: background .12s, border-color .12s;
}
.slot-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.slot-btn.selected { background: var(--primary); color: #fff; border-color: var(--primary); }

.slots-empty { font-size: .875rem; color: var(--text-muted); text-align: center; padding: 32px 16px; }

.booking-form-section {
  border-top: 1px solid var(--border);
  padding: 24px 32px;
  display: none;
}
.booking-form-section.visible { display: block; }
.booking-form-section h3 { font-size: .95rem; font-weight: 600; margin-bottom: 18px; }
.booking-selected-info {
  display: flex;
  gap: 16px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: .875rem;
  flex-wrap: wrap;
}
.booking-selected-info strong { color: var(--primary); }

/* ============================================================
   Confirm / cancel pages
   ============================================================ */
.confirm-page {
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.confirm-card {
  max-width: 480px;
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 40px 36px;
  text-align: center;
}
.confirm-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--success-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.confirm-card h1 { font-size: 1.2rem; margin-bottom: 8px; }
.confirm-card p  { color: var(--text-muted); font-size: .875rem; }
.confirm-details {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin: 20px 0;
  text-align: left;
}
.confirm-detail-row {
  display: flex;
  justify-content: space-between;
  font-size: .875rem;
  padding: 4px 0;
}
.confirm-detail-row span:first-child { color: var(--text-muted); }

/* ============================================================
   Public index
   ============================================================ */
.public-hero {
  padding: 48px 0 36px;
  text-align: center;
}
.public-hero h1 { font-size: 2rem; font-weight: 700; letter-spacing: -.5px; }
.public-hero p  { color: var(--text-muted); margin-top: 10px; font-size: 1rem; }

.type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  padding-bottom: 48px;
}
.type-grid-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .15s;
}
.type-grid-card:hover { box-shadow: var(--shadow-md); }
.type-grid-stripe { height: 5px; }
.type-grid-body { padding: 18px 20px; flex: 1; }
.type-grid-title { font-size: .95rem; font-weight: 600; }
.type-grid-host  { font-size: .78rem; color: var(--text-muted); margin-top: 3px; }
.type-grid-desc  { font-size: .82rem; color: var(--text-muted); margin-top: 8px; line-height: 1.45; }
.type-grid-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.type-grid-duration { font-size: .78rem; color: var(--text-muted); }

/* ============================================================
   Installer
   ============================================================ */
.install-page {
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.install-card {
  width: 100%;
  max-width: 500px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 36px;
}
.install-logo { font-size: .9rem; font-weight: 700; color: var(--primary); margin-bottom: 28px; }
.install-steps {
  display: flex;
  gap: 0;
  margin-bottom: 28px;
}
.install-step {
  flex: 1;
  text-align: center;
  font-size: .75rem;
  font-weight: 600;
  padding: 8px 4px;
  color: var(--text-muted);
  position: relative;
}
.install-step::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--border);
}
.install-step.active { color: var(--primary); }
.install-step.active::after { background: var(--primary); }
.install-step.done { color: var(--success); }
.install-step.done::after { background: var(--success); }

.install-title { font-size: 1.15rem; margin-bottom: 6px; }
.install-sub   { font-size: .875rem; color: var(--text-muted); margin-bottom: 22px; }

.test-result {
  font-size: .8rem;
  margin-top: 6px;
  display: none;
}
.test-result.ok  { color: var(--success); display: block; }
.test-result.err { color: var(--danger);  display: block; }

/* ============================================================
   Copy link / share
   ============================================================ */
.link-box {
  display: flex;
  gap: 8px;
  align-items: center;
}
.link-box input {
  flex: 1;
  background: var(--bg);
  color: var(--text-muted);
  cursor: default;
  font-size: .8rem;
}
.copy-btn-feedback { font-size: .75rem; color: var(--success); display: none; }

/* ============================================================
   Empty states
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}
.empty-state h3 { font-size: 1rem; color: var(--text); margin-bottom: 8px; }
.empty-state p  { font-size: .875rem; }
.empty-state .btn { margin-top: 16px; }

/* ============================================================
   Tabs
   ============================================================ */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab-btn {
  padding: 9px 16px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  margin-bottom: -1px;
  font-family: var(--font);
  transition: color .15s;
  text-decoration: none;
  display: inline-block;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .app-main { margin-left: 0; }
  .app-content { padding: 20px 16px; }
  .app-topbar { padding: 0 16px; }
  .form-row { grid-template-columns: 1fr; }
}