/* ============================================================
   SUBSCRIPTION REMINDER SYSTEM — Main Stylesheet
   ============================================================ */
:root {
  --sidebar-bg: #0f1729;
  --sidebar-active: #2563eb;
  --sidebar-width: 255px;
  --sidebar-collapsed: 68px;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --accent: #0ea5e9;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --info: #0ea5e9;
  --dark: #0f1729;
  --gray-100: #f8f9fc;
  --gray-200: #e9ecef;
  --gray-600: #6c757d;
  --text: #212529;
  --card-shadow: 0 2px 12px rgba(0,0,0,.08);
  --transition: .22s ease;
  --top-height: 60px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body.app-body {
  font-family: 'Inter', sans-serif;
  background: var(--gray-100);
  color: var(--text);
  overflow-x: hidden;
}

/* ---- SIDEBAR ---- */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  z-index: 1050;
  transition: width var(--transition), transform var(--transition);
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 16px 14px;
  border-bottom: 1px solid rgba(255,255,255,.06);
  min-height: 70px;
}

.sidebar-logo { display: flex; align-items: center; gap: 10px; overflow: hidden; }

.logo-icon {
  width: 38px; height: 38px;
  background: var(--primary);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 18px;
  flex-shrink: 0;
}

.logo-title { display: block; font-size: 14px; font-weight: 700; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 150px; }
.logo-sub { display: block; font-size: 10px; color: rgba(255,255,255,.45); letter-spacing: .5px; }

.sidebar-nav { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 6px 0 20px; scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.1) transparent; }
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 4px; }

.nav-list { list-style: none; padding: 0; margin: 0; }

.nav-section-title {
  padding: 14px 18px 5px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: rgba(255,255,255,.3);
  white-space: nowrap;
}

.nav-link-item {
  display: flex;
  align-items: center;
  padding: 9px 16px;
  color: rgba(255,255,255,.65);
  text-decoration: none;
  border-radius: 0 30px 30px 0;
  margin-right: 12px;
  transition: all var(--transition);
  gap: 10px;
  white-space: nowrap;
}
.nav-link-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-item.active > .nav-link-item { background: var(--primary); color: #fff; }

.nav-icon { width: 20px; text-align: center; font-size: 15px; flex-shrink: 0; }
.nav-label { font-size: 13px; font-weight: 500; flex: 1; }
.nav-badge { background: var(--primary); color: #fff; font-size: 10px; padding: 1px 6px; border-radius: 10px; font-weight: 600; }

/* ---- MAIN WRAPPER ---- */
.main-wrapper { margin-left: var(--sidebar-width); min-height: 100vh; display: flex; flex-direction: column; transition: margin-left var(--transition); }

/* ---- TOP NAVBAR ---- */
.top-navbar {
  position: sticky;
  top: 0;
  height: var(--top-height);
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 900;
  box-shadow: 0 1px 6px rgba(0,0,0,.05);
}

.navbar-left, .navbar-right { display: flex; align-items: center; gap: 6px; }

.sidebar-toggle-btn { background: none; border: none; cursor: pointer; color: var(--gray-600); font-size: 17px; padding: 6px 10px; border-radius: 8px; transition: background var(--transition); }
.sidebar-toggle-btn:hover { background: var(--gray-200); color: var(--dark); }

.breadcrumb { font-size: 13px; }
.breadcrumb-item a { color: var(--primary); text-decoration: none; }
.breadcrumb-item.active { color: var(--gray-600); }

.nav-action-btn { background: var(--gray-100); border: 1px solid var(--gray-200); color: var(--text); padding: 6px 12px; border-radius: 8px; font-size: 13px; cursor: pointer; transition: all var(--transition); }
.nav-action-btn:hover { background: var(--gray-200); }

.user-avatar-btn { display: flex; align-items: center; gap: 8px; background: none; border: none; cursor: pointer; padding: 4px 8px; border-radius: 8px; transition: background var(--transition); }
.user-avatar-btn:hover { background: var(--gray-100); }

.avatar-circle { width: 34px; height: 34px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; }
.user-name { font-size: 13px; font-weight: 500; }

.position-relative { position: relative !important; }

/* ---- PAGE CONTENT ---- */
.page-content { flex: 1; padding: 24px; }
.page-footer { padding: 12px 24px; text-align: center; font-size: 12px; color: var(--gray-600); border-top: 1px solid var(--gray-200); }

/* ---- PAGE HEADER ---- */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; flex-wrap: wrap; gap: 12px; }
.page-title { font-size: 22px; font-weight: 700; color: var(--dark); }
.page-subtitle { font-size: 13px; color: var(--gray-600); }

/* ---- KPI CARDS ---- */
.kpi-card { background: #fff; border-radius: 14px; padding: 20px 22px; box-shadow: var(--card-shadow); display: flex; align-items: flex-start; justify-content: space-between; transition: transform var(--transition), box-shadow var(--transition); position: relative; overflow: hidden; }
.kpi-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; }
.kpi-card.kpi-red::before { background: var(--danger); }
.kpi-card.kpi-green::before { background: var(--success); }
.kpi-card.kpi-blue::before { background: var(--info); }
.kpi-card.kpi-orange::before { background: var(--warning); }
.kpi-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.12); }

.kpi-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.kpi-red .kpi-icon  { background: #fde8e8; color: var(--danger); }
.kpi-green .kpi-icon { background: #d4f5de; color: var(--success); }
.kpi-blue .kpi-icon  { background: #dcf5fd; color: var(--info); }
.kpi-orange .kpi-icon { background: #fef3e2; color: var(--warning); }

.kpi-body { flex: 1; padding-left: 14px; }
.kpi-label { font-size: 12px; color: var(--gray-600); font-weight: 500; letter-spacing: .3px; text-transform: uppercase; }
.kpi-value { font-size: 26px; font-weight: 700; color: var(--dark); line-height: 1.2; margin: 3px 0; }
.kpi-trend { font-size: 12px; font-weight: 500; }
.kpi-trend.up   { color: var(--success); }
.kpi-trend.down { color: var(--danger); }

/* ---- GENERAL CARDS ---- */
.panel { background: #fff; border-radius: 12px; box-shadow: var(--card-shadow); overflow: hidden; margin-bottom: 22px; }
.panel-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--gray-200); font-weight: 600; font-size: 15px; }
.panel-body { padding: 20px; }

/* ---- TABLES ---- */
.table-responsive { border-radius: 8px; overflow: hidden; }
.data-table { font-size: 13.5px; margin: 0; }
.data-table thead th { background: var(--gray-100); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--gray-600); border-top: none; padding: 10px 14px; }
.data-table tbody td { padding: 10px 14px; vertical-align: middle; }
.data-table tbody tr:hover { background: rgba(37,99,235,.03); }

/* ---- BUTTONS ---- */
.btn-primary-app { background: var(--primary); color: #fff; border: none; padding: 8px 18px; border-radius: 8px; font-size: 13.5px; font-weight: 500; cursor: pointer; transition: background var(--transition); display: inline-flex; align-items: center; gap: 6px; text-decoration: none; }
.btn-primary-app:hover { background: var(--primary-dark); color: #fff; }
.btn-outline-app { background: transparent; color: var(--primary); border: 1px solid var(--primary); padding: 7px 16px; border-radius: 8px; font-size: 13.5px; font-weight: 500; cursor: pointer; transition: all var(--transition); display: inline-flex; align-items: center; gap: 6px; text-decoration: none; }
.btn-outline-app:hover { background: var(--primary); color: #fff; }

/* ---- FORMS ---- */
.form-input { border: 1px solid var(--gray-200); border-radius: 8px; padding: 8px 12px; font-size: 14px; width: 100%; transition: border-color var(--transition), box-shadow var(--transition); }
.form-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.form-label { font-size: 13px; font-weight: 500; margin-bottom: 5px; }

/* ---- LOGIN ---- */
.login-wrapper { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--sidebar-bg), #1e293b); }
.login-card { background: #fff; border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,.3); padding: 40px; width: 100%; max-width: 400px; }

/* ---- COLLAPSED SIDEBAR ---- */
.sidebar-collapsed .sidebar { width: var(--sidebar-collapsed); }
.sidebar-collapsed .main-wrapper { margin-left: var(--sidebar-collapsed); }
.sidebar-collapsed .logo-text, .sidebar-collapsed .nav-label, .sidebar-collapsed .nav-section-title, .sidebar-collapsed .nav-badge { display: none; }
.sidebar-collapsed .logo-icon { margin: 0 auto; }
.sidebar-collapsed .nav-link-item { justify-content: center; padding: 11px 0; margin-right: 0; border-radius: 0; }
.sidebar-collapsed .nav-icon { font-size: 18px; }

/* ---- RESPONSIVE ---- */
@media (max-width: 992px) {
  .sidebar { transform: translateX(-100%); width: var(--sidebar-width) !important; }
  .sidebar.mobile-open { transform: translateX(0); }
  .main-wrapper { margin-left: 0 !important; }
}

/* ---- DASHBOARD CHARTS ---- */
.chart-wrapper { position: relative; height: 240px; }
.activity-item { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--gray-200); }
.activity-item:last-child { border: none; }
.activity-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); flex-shrink: 0; }
.activity-text { flex: 1; font-size: 13px; }
.activity-time { font-size: 11px; color: var(--gray-600); }

/* ---- ALERTS ---- */
.alert { font-size: 13.5px; border: none; border-radius: 10px; }
.alert-success { background: #d4f5de; color: #146c2e; }
.alert-danger  { background: #fde8ea; color: #991b1b; }
.alert-warning { background: #fff3cd; color: #6b4c0c; }
.alert-info    { background: #dcf5fd; color: #0a6ebd; }

/* ---- MODALS ---- */
.modal-header { background: var(--dark); color: #fff; border-bottom: none; border-radius: 12px 12px 0 0; }
.modal-header .btn-close { filter: invert(1); }
.modal-content { border: none; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,.2); }

/* ---- CALENDAR ---- */
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal-day-head { text-align: center; font-size: 11px; font-weight: 700; color: var(--gray-600); text-transform: uppercase; padding: 6px 0; }
.cal-day { min-height: 90px; background: #fff; border-radius: 8px; padding: 6px; border: 1px solid var(--gray-200); font-size: 11px; }
.cal-day.today { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(37,99,235,.15); }
.cal-day.other-month { background: var(--gray-100); color: #adb5bd; }
.cal-day-num { font-weight: 700; font-size: 12px; margin-bottom: 4px; }
.cal-event { border-radius: 5px; padding: 2px 5px; margin-bottom: 2px; font-size: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cal-event.upcoming { background: var(--primary-light); color: var(--primary-dark); }
.cal-event.overdue { background: #fde8e8; color: var(--danger); }
.cal-event.today-event { background: var(--warning); color: #fff; }

@media print {
  .sidebar, .top-navbar, .page-footer, .btn, .no-print { display: none !important; }
  .main-wrapper { margin-left: 0 !important; }
  .page-content { padding: 0; }
}