/* =============================================
   ZAPFLOW — Design System v2.0
   Professional, Minimal, Refined
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg-body: #0a0a0f;
  --bg-sidebar: #0e0e14;
  --bg-card: #12121a;
  --bg-card-hover: #181824;
  --bg-input: #14141e;
  --bg-input-focus: #1a1a28;

  /* Accent */
  --accent: #6c5ce7;
  --accent-hover: #7c6ff0;
  --accent-glow: rgba(108, 92, 231, 0.15);
  --accent-soft: rgba(108, 92, 231, 0.08);

  /* Semantic */
  --green: #00d68f;
  --green-soft: rgba(0, 214, 143, 0.1);
  --blue: #339af0;
  --blue-soft: rgba(51, 154, 240, 0.1);
  --yellow: #fcc419;
  --yellow-soft: rgba(252, 196, 25, 0.1);
  --red: #ff6b6b;
  --red-soft: rgba(255, 107, 107, 0.1);

  /* Text */
  --text-primary: #e8e8ed;
  --text-secondary: #9898a8;
  --text-muted: #5a5a6e;

  /* Borders */
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.1);

  /* Sizing */
  --sidebar-w: 260px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;

  /* Premium Effects */
  --glass: rgba(18, 18, 26, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --gradient-premium: linear-gradient(135deg, var(--accent) 0%, #a29bfe 100%);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

/* =============================================
   LAYOUT
   ============================================= */
.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 28px 16px;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.sidebar-brand svg {
  color: var(--accent);
}

.sidebar-brand .brand-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sidebar-brand .brand-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 160px;
}

.sidebar-section {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  padding: 0 12px;
  margin: 20px 0 8px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
  margin-bottom: 2px;
}

.sidebar-link:hover {
  background: var(--accent-soft);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px rgba(108, 92, 231, 0.3);
}

.sidebar-link svg {
  width: 18px;
  height: 18px;
  opacity: 0.7;
  flex-shrink: 0;
}

.sidebar-link.active svg {
  opacity: 1;
}

.sidebar-spacer {
  flex: 1;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 32px 40px;
  max-width: 1200px;
}

/* =============================================
   PAGE HEADER
   ============================================= */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 4px;
}

/* =============================================
   CARDS
   ============================================= */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card-premium {
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.card:hover {
  border-color: var(--accent-glow);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
}

/* =============================================
   STATS
   ============================================= */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.stat-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.stat-icon.green {
  background: var(--green-soft);
  color: var(--green);
}

.stat-icon.blue {
  background: var(--blue-soft);
  color: var(--blue);
}

.stat-icon.yellow {
  background: var(--yellow-soft);
  color: var(--yellow);
}

.stat-icon.red {
  background: var(--red-soft);
  color: var(--red);
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

/* =============================================
   FORMS
   ============================================= */
.form-group {
  margin-bottom: 18px;
  flex: 1;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  transition: all 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

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

.form-hint {
  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-sm);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-danger {
  background: var(--red-soft);
  color: var(--red);
  border: 1px solid rgba(255, 107, 107, 0.2);
}

.btn-danger:hover {
  background: rgba(255, 107, 107, 0.2);
}

.btn-success {
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid rgba(0, 214, 143, 0.2);
}

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

/* =============================================
   TABLE
   ============================================= */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

td {
  padding: 14px 16px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* =============================================
   BADGES
   ============================================= */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.badge-green {
  background: var(--green-soft);
  color: var(--green);
}

.badge-blue {
  background: var(--blue-soft);
  color: var(--blue);
}

.badge-yellow {
  background: var(--yellow-soft);
  color: var(--yellow);
}

.badge-red {
  background: var(--red-soft);
  color: var(--red);
}

.badge-muted {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

/* =============================================
   TOGGLE
   ============================================= */
.toggle-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
}

.toggle input {
  display: none;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg-input);
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: 0.2s;
}

.toggle-slider:before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 2px;
  bottom: 2px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: 0.2s;
}

.toggle input:checked+.toggle-slider {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle input:checked+.toggle-slider:before {
  transform: translateX(20px);
  background: #fff;
}

/* =============================================
   ALERTS
   ============================================= */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.alert-success {
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid rgba(0, 214, 143, 0.15);
}

.alert-error {
  background: var(--red-soft);
  color: var(--red);
  border: 1px solid rgba(255, 107, 107, 0.15);
}

.alert-info {
  background: var(--blue-soft);
  color: var(--blue);
  border: 1px solid rgba(51, 154, 240, 0.15);
}

/* =============================================
   LOGIN
   ============================================= */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at top, rgba(108, 92, 231, 0.08), transparent 60%),
    var(--bg-body);
}

.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 6px;
}

.login-logo svg {
  color: var(--accent);
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 32px;
}

/* =============================================
   MODAL
   ============================================= */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 24px;
}

/* =============================================
   QR CODE BOX
   ============================================= */
.qr-container {
  text-align: center;
  padding: 32px;
  background: var(--bg-input);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
}

.qr-container img {
  max-width: 280px;
  border-radius: var(--radius);
}

/* =============================================
   EMPTY STATE
   ============================================= */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.3;
}

/* =============================================
   STATUS DOT
   ============================================= */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.status-dot.offline {
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
}

/* =============================================
   INFO LIST
   ============================================= */
.info-list {
  list-style: none;
}

.info-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.5;
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list li svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 1px;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  .sidebar {
    display: none;
  }

  .main-content {
    margin-left: 0;
    padding: 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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