/* ==========================================================================
   ApexCoach - Classic Web Admin Panel Stylesheet (Desktop Obsidian Design)
   ========================================================================== */

:root {
  --bg-dark: #070A12;
  --bg-sidebar: #0D121F;
  --bg-card: #141B2D;
  --bg-card-hover: #1C263B;
  
  --primary: #10B981;
  --primary-glow: rgba(16, 185, 129, 0.25);
  --primary-hover: #059669;
  
  --accent: #06B6D4;
  --coach-purple: #8B5CF6;

  --text-main: #F3F4F6;
  --text-muted: #9CA3AF;
  --border-color: rgba(255, 255, 255, 0.08);

  --font-heading: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;

  --sidebar-width: 240px;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Sidebar Layout */
.admin-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 100;
  padding: 20px 16px;
}

.admin-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 30px; }
.logo-badge {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center; color: #000;
  box-shadow: 0 4px 12px var(--primary-glow);
}
.brand-text h1 { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 800; }
.brand-text h1 span { color: var(--primary); }
.brand-text p { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }

.admin-nav { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.nav-link {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  color: var(--text-muted); text-decoration: none; border-radius: 10px;
  font-size: 0.85rem; font-weight: 600; transition: all 0.15s ease;
}
.nav-link svg { width: 18px; height: 18px; }
.nav-link:hover, .nav-link.active {
  background-color: rgba(16, 185, 129, 0.1); color: var(--primary);
}

.sidebar-footer { padding-top: 16px; border-top: 1px solid var(--border-color); }
.btn-back-app {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 10px; background-color: rgba(255, 255, 255, 0.05); border: 1px solid var(--border-color);
  border-radius: 10px; color: var(--text-main); font-size: 0.8rem; font-weight: 600;
  text-decoration: none; justify-content: center;
}

/* Main Content Area */
.admin-main {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.admin-topbar {
  height: 65px; background-color: rgba(13, 18, 31, 0.9);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-color);
  padding: 0 24px; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 90;
}

.topbar-search { position: relative; width: 300px; }
.topbar-search input {
  width: 100%; background-color: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 10px; padding: 8px 12px 8px 34px; color: var(--text-main); font-size: 0.82rem; outline: none;
}
.search-icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--text-muted); }

.topbar-user { display: flex; align-items: center; gap: 12px; }
.admin-profile { display: flex; align-items: center; gap: 8px; }
.admin-profile img { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; border: 2px solid var(--primary); }
.admin-profile-info { display: flex; flex-direction: column; }
.admin-profile-info strong { font-size: 0.82rem; }
.admin-profile-info span { font-size: 0.68rem; color: var(--text-muted); }

.admin-content { padding: 24px; display: flex; flex-direction: column; gap: 24px; }

/* KPI Grid */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.kpi-card {
  background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px;
  padding: 16px; display: flex; justify-content: space-between; align-items: flex-start;
}
.kpi-info span { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; }
.kpi-val { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 800; margin: 4px 0; }
.kpi-trend { font-size: 0.7rem; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 3px; }

.kpi-icon {
  width: 42px; height: 42px; border-radius: 12px; background-color: rgba(16, 185, 129, 0.1);
  display: flex; align-items: center; justify-content: center; color: var(--primary);
}

/* Sections */
.admin-section { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 18px; padding: 20px; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.section-header h2 { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }

/* Plan Config Cards */
.plans-config-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.plan-config-card {
  background-color: rgba(255, 255, 255, 0.02); border: 1px solid var(--border-color); border-radius: 14px;
  padding: 16px; display: flex; flex-direction: column; gap: 12px;
}
.plan-config-card.active-plan { border-color: var(--primary); }

.plan-title-badge { display: flex; justify-content: space-between; align-items: center; }
.plan-title-badge h3 { font-size: 1rem; font-weight: 800; }

.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 0.72rem; font-weight: 600; color: var(--text-muted); }
.form-control {
  background-color: var(--bg-dark); border: 1px solid var(--border-color); border-radius: 8px;
  padding: 8px 10px; color: var(--text-main); font-size: 0.82rem; outline: none;
}
.form-control:focus { border-color: var(--primary); }

/* Table Styling */
.table-responsive { overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; text-align: left; }
.admin-table th { font-size: 0.72rem; text-transform: uppercase; color: var(--text-muted); padding: 12px; border-bottom: 1px solid var(--border-color); }
.admin-table td { padding: 12px; border-bottom: 1px solid var(--border-color); font-size: 0.85rem; vertical-align: middle; }

.coach-cell { display: flex; align-items: center; gap: 10px; }
.coach-cell img { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.coach-info { display: flex; flex-direction: column; }
.coach-name { font-weight: 700; }
.coach-email { font-size: 0.72rem; color: var(--text-muted); }

.status-badge { padding: 3px 8px; border-radius: 10px; font-size: 0.68rem; font-weight: 700; }
.status-active { background-color: rgba(16, 185, 129, 0.2); color: var(--primary); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover)); color: #000;
  border: none; border-radius: 10px; padding: 10px 18px; font-size: 0.85rem; font-weight: 700;
  cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
}

.btn-primary:hover { transform: translateY(-1px); }

.toast-container { position: fixed; top: 20px; right: 20px; z-index: 300; display: flex; flex-direction: column; gap: 8px; }
.toast { background-color: var(--bg-card); border: 1px solid var(--primary); border-radius: 10px; padding: 12px 16px; font-size: 0.85rem; color: var(--text-main); box-shadow: 0 8px 24px rgba(0,0,0,0.5); }