/* GymSoft — Minimalist Light UI */
:root {
  --gs-primary:       #0f172a;
  --gs-secondary:     #4f46e5;
  --gs-accent:        #0ea5e9;
  --gs-success:       #10b981;
  --gs-warning:       #f59e0b;
  --gs-danger:        #ef4444;

  --gs-bg:            #f8fafc;
  --gs-bg-sidebar:    #ffffff;
  --gs-bg-topbar:     #ffffff;
  --gs-card:          #ffffff;
  --gs-card-hover:    #f1f5f9;
  --gs-border:        #e2e8f0;

  --gs-text:          #0f172a;
  --gs-text-muted:    #64748b;
  --gs-text-dim:      #94a3b8;

  --sidebar-w:        260px;
  --topbar-h:         68px;
  --radius:           16px;
  --radius-sm:        10px;
  --shadow:           0 10px 25px -5px rgba(0, 0, 0, 0.05);
  --shadow-sm:        0 1px 3px 0 rgba(0, 0, 0, 0.05);
  --transition:       all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--gs-bg);
  color: var(--gs-text);
  margin: 0;
  overflow-x: hidden;
  font-size: 0.925rem;
  line-height: 1.6;
}

/* ===================== SIDEBAR ===================== */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--gs-bg-sidebar);
  border-right: 1px solid var(--gs-border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: var(--transition);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 24px;
  min-height: var(--topbar-h);
}

.sidebar-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  background: var(--gs-bg);
  padding: 4px;
  border: 1px solid var(--gs-border);
}

.sidebar-logo-placeholder {
  width: 44px; height: 44px;
  background: var(--gs-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sidebar-logo-placeholder i { color: white; font-size: 1.4rem; }

.sidebar-brand-text { overflow: hidden; display: flex; flex-direction: column; }
.brand-name {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--gs-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: -0.01em;
}
.brand-sub {
  font-size: 0.72rem;
  color: var(--gs-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-divider {
  display: none; /* Cleaner look without dividers */
}

.sidebar-section {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--gs-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 16px 24px 8px;
}

.sidebar-nav {
  list-style: none;
  padding: 0 12px;
  margin: 0;
  flex: 1;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  color: var(--gs-text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  margin-bottom: 4px;
}
.sidebar-link i { font-size: 1.15rem; flex-shrink: 0; }
.sidebar-link:hover {
  background: var(--gs-bg);
  color: var(--gs-primary);
}
.sidebar-item.active .sidebar-link {
  background: var(--gs-primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08); /* Minimalist pop */
}
.sidebar-item.active .sidebar-link i { color: #ffffff; }

.sidebar-bottom {
  padding: 16px 12px 24px;
}
.logout-link { color: var(--gs-danger) !important; font-weight: 600; }
.logout-link:hover { background: rgba(239,68,68,0.08) !important; }

/* ===================== MAIN CONTENT ===================== */
.main-content {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.content-area {
  padding: 32px;
  flex: 1;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ===================== TOPBAR ===================== */
.topbar {
  height: var(--topbar-h);
  background: var(--gs-bg-topbar);
  border-bottom: 1px solid var(--gs-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 500;
}

.topbar-toggle {
  background: none;
  border: none;
  color: var(--gs-text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  margin-right: 16px;
  display: none; /* Hide on desktop */
}
@media (max-width: 768px) { .topbar-toggle { display: block; } }

.topbar-toggle:hover { background: var(--gs-bg); color: var(--gs-text); }

.page-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--gs-text);
  margin: 0;
  letter-spacing: -0.01em;
}

.topbar-right { display: flex; align-items: center; gap: 16px; }

.topbar-user-btn {
  display: flex; align-items: center; gap: 12px;
  background: none;
  border: 1px solid transparent;
  border-radius: 50px;
  padding: 4px 16px 4px 4px;
  cursor: pointer;
  color: var(--gs-text);
  transition: var(--transition);
}
.topbar-user-btn:hover { background: var(--gs-bg); border-color: var(--gs-border); }
.topbar-user-btn::after { display: none; }

.topbar-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid white;
  box-shadow: var(--shadow-sm);
}
.topbar-avatar-placeholder {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--gs-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: white;
  flex-shrink: 0;
}

.topbar-user-info { line-height: 1.2; text-align: left; }
.topbar-name { display: block; font-weight: 700; font-size: 0.85rem; }
.topbar-role { display: block; font-size: 0.72rem; color: var(--gs-text-muted); font-weight: 500; }

.dropdown-menu {
  background: var(--gs-card);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  padding: 8px;
}
.dropdown-item { color: var(--gs-text); border-radius: var(--radius-sm); font-weight: 500; font-size: 0.85rem; padding: 8px 16px; }
.dropdown-item:hover { background: var(--gs-bg); color: var(--gs-primary); }
.dropdown-divider { border-color: var(--gs-border); margin: 4px 0;}

/* ===================== CARDS & KPI ===================== */
.gs-card {
  background: var(--gs-card);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.gs-card:hover {
  border-color: rgba(0,0,0,0.1);
  box-shadow: var(--shadow);
}

.kpi-card {
  background: var(--gs-card);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.kpi-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--gs-primary); }
.kpi-card::before { display: none; } /* removed bold left borders for minimalism */

.kpi-icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}
/* With custom colors we will colorize backgrounds subtly */
.kpi-icon.primary { background: var(--gs-bg); color: var(--gs-primary); }
.kpi-icon.success { background: rgba(16,185,129,0.1); color: var(--gs-success); }
.kpi-icon.warning { background: rgba(245,158,11,0.1); color: var(--gs-warning); }
.kpi-icon.danger  { background: rgba(239,68,68,0.1);  color: var(--gs-danger); }
.kpi-icon.accent  { background: rgba(14,165,233,0.1); color: var(--gs-accent); }

.kpi-value {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--gs-text);
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.kpi-label {
  font-size: 0.8rem;
  color: var(--gs-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===================== TABLES ===================== */
.gs-table {
  width: 100%;
  border-collapse: collapse;
}
.gs-table thead th {
  background: var(--gs-card);
  color: var(--gs-text-dim);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 16px;
  border-bottom: 2px solid var(--gs-border);
}
.gs-table tbody tr {
  border-bottom: 1px solid var(--gs-border);
  transition: var(--transition);
}
.gs-table tbody tr:hover { background: var(--gs-bg); }
.gs-table tbody td {
  padding: 16px;
  vertical-align: middle;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gs-text);
}
.gs-table tbody tr:last-child { border-bottom: none; }

/* ===================== BADGES ===================== */
.gs-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.gs-badge.active  { background: rgba(16,185,129,0.1);  color: var(--gs-success); }
.gs-badge.expired { background: rgba(239,68,68,0.1);   color: var(--gs-danger); }
.gs-badge.suspended { background: rgba(245,158,11,0.1); color: var(--gs-warning); }
.gs-badge.pending { background: rgba(99,102,241,0.1);  color: var(--gs-secondary); }

/* ===================== BUTTONS ===================== */
.btn-gs-primary {
  background: var(--gs-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
}
.btn-gs-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
  color: white;
  filter: brightness(1.1);
}

.btn-gs-outline {
  background: white;
  color: var(--gs-text);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
}
.btn-gs-outline:hover { 
  border-color: var(--gs-text-dim); 
  background: var(--gs-bg);
}

/* ===================== FORMS ===================== */
.form-control, .form-select {
  background: var(--gs-bg) !important;
  border: 1px solid var(--gs-border) !important;
  color: var(--gs-text) !important;
  border-radius: var(--radius-sm) !important;
  padding: 10px 16px !important;
  transition: var(--transition) !important;
  font-size: 0.9rem !important;
  font-weight: 500;
  box-shadow: none !important;
}
.form-control:focus, .form-select:focus {
  border-color: var(--gs-primary) !important;
  box-shadow: 0 0 0 3px rgba(0,0,0,0.05) !important;
  background: white !important;
}
.form-label { color: var(--gs-text); font-size: 0.85rem; font-weight: 700; margin-bottom: 8px; }
.form-control::placeholder { color: var(--gs-text-dim) !important; font-weight: 400; }

/* ===================== AUTH / LOGIN ===================== */
.auth-page {
  min-height: 100vh;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 24px;
}
.auth-card {
  background: var(--gs-card);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius);
  padding: 48px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}
.auth-logo {
  width: 64px; height: 64px;
  background: var(--gs-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  margin: 0 auto 24px;
  box-shadow: var(--shadow-sm);
}
.auth-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--gs-text);
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.auth-subtitle {
  font-size: 0.95rem;
  color: var(--gs-text-muted);
  text-align: center;
  margin-bottom: 32px;
}

/* ===================== PROGRESS BAR ===================== */
.gs-progress {
  height: 8px;
  background: var(--gs-bg);
  border-radius: 50px;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
}
.gs-progress-bar {
  height: 100%;
  border-radius: 50px;
  background: var(--gs-primary);
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================== AVATAR ===================== */
.user-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--gs-bg);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem; color: var(--gs-primary);
  flex-shrink: 0;
  border: 1px solid var(--gs-border);
}

/* ===================== MESSAGES ===================== */
.messages-container { margin-bottom: 24px; }
.gs-alert {
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  padding: 16px;
}
.alert-success { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.alert-error, .alert-danger { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.alert-info { background: #f0f9ff; border-color: #bae6fd; color: #075985; }

/* ===================== RESPONSIVE ===================== */
.sidebar-collapsed .sidebar { width: 80px; }
.sidebar-collapsed .sidebar-brand-text,
.sidebar-collapsed .sidebar-link span,
.sidebar-collapsed .sidebar-section,
.sidebar-collapsed .brand-sub { display: none; }
.sidebar-collapsed .sidebar-link { padding: 12px; justify-content: center; }
.sidebar-collapsed .main-content { margin-left: 80px; }

.sidebar-overlay { display: none; }
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  body.sidebar-mobile-open .sidebar { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .content-area { padding: 16px; }
  
  body.sidebar-mobile-open .sidebar-overlay {
    display: block;
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(15, 23, 42, 0.4); /* Dark muted overlay */
    z-index: 990;
    backdrop-filter: blur(4px);
  }
}

/* ===================== CHART CONTAINER ===================== */
.chart-container {
  position: relative;
  height: 280px;
  width: 100%;
}

/* ===================== SECTION HEADER ===================== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.section-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--gs-text);
  margin: 0;
  letter-spacing: -0.01em;
}

/* ===================== MEMBERSHIP STATUS CARD ===================== */
.membership-status-card {
  background: white;
  border: 1px solid var(--gs-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.membership-status-card::after {
  content: '';
  position: absolute;
  top: 0; right: 0; width: 120px; height: 120px;
  background: var(--gs-accent);
  opacity: 0.05;
  border-radius: 0 0 0 100%;
}
.membership-days-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--gs-bg);
  color: var(--gs-primary);
  border-radius: 50px;
  padding: 6px 16px;
  font-weight: 800;
  font-size: 0.9rem;
  border: 1px solid var(--gs-border);
}

/* ===================== PLATFORM ADMIN ===================== */
.gym-card {
  background: var(--gs-card);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
  box-shadow: var(--shadow-sm);
}
.gym-card:hover {
  border-color: var(--gs-primary);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  color: inherit;
  transform: translateY(-2px);
}

/* ===================== IMAGE UPLOAD ===================== */
.image-upload-container {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.image-upload-item {
  flex: 1;
  min-width: 200px;
}
.image-upload-preview {
  width: 100%;
  height: 140px;
  background: var(--gs-bg);
  border: 2px dashed var(--gs-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  transition: var(--transition);
  cursor: pointer;
  margin-top: 8px;
}
.image-upload-preview:hover {
  border-color: var(--gs-primary);
  background: white;
}
.image-upload-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
}
.image-upload-preview.favicon-preview {
  height: 100px;
  width: 100px;
}
.image-upload-icon {
  font-size: 1.8rem;
  color: var(--gs-text-dim);
  margin-bottom: 4px;
}
.image-upload-text {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--gs-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.image-upload-input {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 10;
}
.image-upload-info {
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--gs-text-dim);
}