:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #e2e5ea;
  --color-text: #1c1f26;
  --color-text-muted: #6b7280;
  --color-primary: #2f5dd4;
  --color-primary-dark: #23459e;
  --color-success: #1c8a4c;
  --color-success-bg: #e6f6ec;
  --color-danger: #c22f3a;
  --color-danger-bg: #fbe9ea;
  --color-warning: #a6660b;
  --color-warning-bg: #fdf1de;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(20, 24, 33, 0.08);
  --sidebar-width: 220px;
  --header-height: 56px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.5;
}

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

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 0.6em;
}
h1 { font-size: 1.5rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.02rem; }

/* ---------- Layout ---------- */

.app-header {
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.app-header .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
}

.app-header .user-box {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1.1rem;
}

.app-shell {
  display: flex;
  min-height: calc(100vh - var(--header-height));
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 16px 8px;
}

.sidebar nav a {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.92rem;
  margin-bottom: 2px;
}
.sidebar nav a:hover {
  background: var(--color-bg);
  text-decoration: none;
}
.sidebar nav a.active {
  background: #eaf0fd;
  color: var(--color-primary-dark);
  font-weight: 600;
}
.sidebar .nav-section-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  padding: 14px 12px 4px;
}

.main-content {
  flex: 1;
  padding: 24px;
  max-width: 1200px;
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    z-index: 15;
    box-shadow: var(--shadow);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    padding: 16px;
  }
}

/* ---------- Cards / surfaces ---------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.stat-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
}
.stat-tile .stat-value {
  font-size: 1.6rem;
  font-weight: 700;
}
.stat-tile .stat-label {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.stat-tile.warning {
  border-color: #f0cf9a;
  background: var(--color-warning-bg);
}

/* ---------- Forms ---------- */

.form-group {
  margin-bottom: 16px;
}
label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  margin-bottom: 5px;
}
.hint {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-top: 4px;
}
input[type=text], input[type=password], input[type=number],
input[type=date], input[type=datetime-local], input[type=email],
input[type=url], select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: inherit;
}
textarea {
  resize: vertical;
  min-height: 90px;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(47, 93, 212, 0.15);
}
.checkbox-group, .radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}
.checkbox-group label, .radio-group label {
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 6px;
}
fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
  margin: 0 0 16px;
}
legend {
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0 6px;
}

.form-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.form-row > .form-group {
  flex: 1;
  min-width: 200px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover {
  background: var(--color-bg);
  text-decoration: none;
}
.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}
.btn-danger {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: #fff;
}
.btn-sm {
  padding: 5px 10px;
  font-size: 0.82rem;
}
.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ---------- Tables ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
}
th {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
tr:hover td {
  background: #fafbfc;
}
.table-wrap {
  overflow-x: auto;
}

/* ---------- Badges / alerts ---------- */

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 600;
}
.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.badge-muted { background: var(--color-bg); color: var(--color-text-muted); }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.92rem;
}
.alert-success { background: var(--color-success-bg); color: var(--color-success); }
.alert-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.alert-warning { background: var(--color-warning-bg); color: var(--color-warning); }

/* ---------- Auth pages ---------- */

.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}
.auth-card h1 {
  font-size: 1.3rem;
  text-align: center;
  margin-bottom: 4px;
}
.auth-card .subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin-bottom: 22px;
}

/* ---------- Wizard ---------- */

.wizard-steps {
  display: flex;
  gap: 6px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.wizard-step-pill {
  flex: 1;
  min-width: 80px;
  text-align: center;
  padding: 8px 6px;
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
}
.wizard-step-pill.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.wizard-step-pill.done {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: #bfe6cd;
}

.platform-url-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 8px;
}
.platform-url-row label {
  min-width: 90px;
  margin-bottom: 0;
}

.text-muted { color: var(--color-text-muted); }
.mt-0 { margin-top: 0; }