/* ===== DESIGN TOKENS ===== */
:root {
  --color-primary: #D72638;
  --color-primary-hover: #B71E30;
  --color-primary-light: #FDEDEF;
  --color-dark: #1A1A1A;
  --color-text: #333333;
  --color-text-secondary: #777777;
  --color-bg: #F5F5F5;
  --color-white: #FFFFFF;
  --color-border: #E5E5E5;
  --color-success: #2ECC71;
  --color-success-dark: #1FA855;
  --color-warning: #F39C12;
  --color-warning-dark: #E67E22;
  --color-info: #3498DB;
  --color-card-shadow: 0 2px 12px rgba(0,0,0,0.06);
  --radius: 10px;
  --radius-sm: 6px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --sidebar-width: 260px;
  --header-height: 64px;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  overflow: hidden;
  height: 100vh;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

/* ===== LAYOUT ===== */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr 320px;
  grid-template-rows: var(--header-height) 1fr;
  height: 100vh;
}
.layout.no-right {
  grid-template-columns: var(--sidebar-width) 1fr;
}

/* ===== HEADER ===== */
.header {
  grid-column: 1 / -1;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  z-index: 100;
}
.header-left { display: flex; align-items: center; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--color-dark); letter-spacing: -0.02em; }
.logo .erka { font-size: 20px; line-height: 1; }
.logo .erka span { color: var(--color-primary); }
.logo-sub { font-size: 10px; font-weight: 500; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.08em; }

.search-box {
  display: flex; align-items: center;
  background: var(--color-bg);
  border-radius: 24px;
  padding: 8px 16px; gap: 8px; width: 380px;
  border: 1px solid var(--color-border);
  transition: border-color 0.2s;
}
.search-box:focus-within { border-color: var(--color-primary); }
.search-box input { border: none; background: none; outline: none; font-family: var(--font); font-size: 14px; color: var(--color-text); flex: 1; }
.search-box input::placeholder { color: #aaa; }
.search-box svg { color: #aaa; flex-shrink: 0; }

.header-right { display: flex; align-items: center; gap: 18px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--color-border); background: var(--color-white);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; position: relative; transition: background 0.15s;
  color: var(--color-text);
}
.icon-btn:hover { background: var(--color-bg); }
.badge {
  position: absolute; top: -2px; right: -2px;
  min-width: 16px; height: 16px; padding: 0 4px;
  border-radius: 50%; background: var(--color-primary);
  color: white; font-size: 10px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.user-profile {
  display: flex; align-items: center; gap: 10px; cursor: pointer;
  padding: 4px 12px 4px 4px; border-radius: 24px; transition: background 0.15s;
}
.user-profile:hover { background: var(--color-bg); }
.avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-primary-light); color: var(--color-primary);
  font-weight: 700; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.user-name { font-size: 14px; font-weight: 600; color: var(--color-dark); }
.user-role { font-size: 11px; color: var(--color-text-secondary); }

/* Role switcher */
.role-switcher {
  display: flex; background: var(--color-bg); border-radius: 20px; padding: 3px;
  font-size: 12px; font-weight: 600;
}
.role-switcher a {
  padding: 5px 12px; border-radius: 16px; color: var(--color-text-secondary);
  transition: all 0.15s;
}
.role-switcher a.active { background: var(--color-white); color: var(--color-dark); box-shadow: 0 1px 3px rgba(0,0,0,0.08); }

/* ===== SIDEBAR ===== */
.sidebar {
  background: var(--color-white);
  border-right: 1px solid var(--color-border);
  padding: 24px 0; overflow-y: auto;
}
.sidebar-section { margin-bottom: 8px; }
.sidebar-label {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--color-text-secondary);
  padding: 12px 24px 8px;
}
.sidebar-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 24px; font-size: 14px; font-weight: 500;
  color: var(--color-text); cursor: pointer;
  transition: all 0.15s; border-left: 3px solid transparent;
}
.sidebar-item:hover { background: var(--color-bg); color: var(--color-dark); }
.sidebar-item.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 600;
}
.sidebar-item svg { flex-shrink: 0; width: 20px; height: 20px; }
.sidebar-item .item-badge {
  margin-left: auto; background: var(--color-primary); color: white;
  font-size: 11px; font-weight: 700; padding: 1px 7px; border-radius: 10px;
}
.sidebar-item .item-coin {
  margin-left: auto; background: var(--color-warning); color: white;
  font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 10px;
  display: flex; align-items: center; gap: 3px;
}

/* ===== MAIN CONTENT ===== */
.main {
  overflow-y: auto; padding: 28px;
  display: flex; flex-direction: column; gap: 24px;
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: 13px; color: var(--color-text-secondary);
  display: flex; align-items: center; gap: 8px;
}
.breadcrumbs a { color: var(--color-text-secondary); transition: color 0.15s; }
.breadcrumbs a:hover { color: var(--color-primary); }
.breadcrumbs .sep { color: #ccc; }
.breadcrumbs .current { color: var(--color-dark); font-weight: 500; }

/* Page title */
.page-title { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.page-title h1 { font-size: 24px; font-weight: 800; color: var(--color-dark); letter-spacing: -0.02em; }

/* Welcome Banner */
.welcome-banner {
  background: linear-gradient(135deg, var(--color-dark) 0%, #2C2C2C 50%, #3A3A3A 100%);
  border-radius: var(--radius);
  padding: 36px 40px; color: white;
  position: relative; overflow: hidden;
  min-height: 180px;
  display: flex; flex-direction: column; justify-content: center;
}
.welcome-banner::after {
  content: ''; position: absolute; right: -30px; top: -30px;
  width: 260px; height: 260px; border-radius: 50%;
  background: var(--color-primary); opacity: 0.08;
}
.welcome-banner::before {
  content: ''; position: absolute; right: 60px; bottom: -40px;
  width: 180px; height: 180px; border-radius: 50%;
  background: var(--color-primary); opacity: 0.05;
}
.welcome-banner h1 { font-size: 26px; font-weight: 800; margin-bottom: 6px; letter-spacing: -0.02em; }
.welcome-banner p { font-size: 15px; color: rgba(255,255,255,0.7); max-width: 500px; }
.welcome-banner .stats-row { display: flex; gap: 32px; margin-top: 20px; }
.welcome-banner .stat-item { display: flex; flex-direction: column; }
.welcome-banner .stat-value { font-size: 22px; font-weight: 800; color: var(--color-primary); }
.welcome-banner .stat-label { font-size: 12px; color: rgba(255,255,255,0.5); margin-top: 2px; }

/* Section headers */
.section-header { display: flex; align-items: center; justify-content: space-between; }
.section-header h2 { font-size: 18px; font-weight: 700; color: var(--color-dark); letter-spacing: -0.01em; }
.section-header a { font-size: 13px; color: var(--color-primary); font-weight: 600; cursor: pointer; }
.section-header a:hover { text-decoration: underline; }

/* Course Cards grid */
.courses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.courses-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.course-card {
  background: var(--color-white); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--color-card-shadow);
  transition: transform 0.2s, box-shadow 0.2s; cursor: pointer;
  display: block;
}
.course-card:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(0,0,0,0.1); }
.course-thumb { height: 120px; position: relative; display: flex; align-items: center; justify-content: center; }
.course-thumb .thumb-icon {
  width: 48px; height: 48px; border-radius: 50%;
  background: rgba(255,255,255,0.9);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.course-thumb .course-tag {
  position: absolute; top: 10px; left: 10px;
  background: rgba(255,255,255,0.92);
  font-size: 11px; font-weight: 600;
  padding: 3px 10px; border-radius: 12px;
  color: var(--color-dark);
}
.course-body { padding: 16px; }
.course-body h3 {
  font-size: 14px; font-weight: 700; color: var(--color-dark);
  margin-bottom: 6px; line-height: 1.35;
}
.course-body .course-meta {
  display: flex; align-items: center; gap: 12px;
  font-size: 12px; color: var(--color-text-secondary);
}
.course-body .course-meta span { display: flex; align-items: center; gap: 4px; }
.course-progress-bar {
  margin-top: 12px; height: 4px;
  background: var(--color-bg); border-radius: 2px; overflow: hidden;
}
.course-progress-fill { height: 100%; border-radius: 2px; transition: width 0.5s ease; }
.course-progress-info {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--color-text-secondary); margin-top: 6px;
}

/* Courses Table */
.courses-table {
  background: var(--color-white); border-radius: var(--radius);
  box-shadow: var(--color-card-shadow); overflow: hidden;
}
.courses-table-header {
  display: grid; grid-template-columns: 1fr 120px 120px 100px;
  padding: 12px 20px; background: var(--color-bg);
  font-size: 12px; font-weight: 600; color: var(--color-text-secondary);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.courses-table-row {
  display: grid; grid-template-columns: 1fr 120px 120px 100px;
  padding: 14px 20px; align-items: center;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px; transition: background 0.1s; cursor: pointer;
}
.courses-table-row:hover { background: #FAFAFA; }
.courses-table-row:last-child { border-bottom: none; }
.row-course-name { display: flex; align-items: center; gap: 12px; }
.row-course-icon {
  width: 32px; height: 32px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.row-course-title { font-weight: 600; color: var(--color-dark); }
.row-status {
  font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: 12px;
  display: inline-block; width: fit-content;
}
.status-done { background: #E8F8EF; color: #1FA855; }
.status-progress { background: #FFF3E0; color: #E67E22; }
.status-new { background: var(--color-primary-light); color: var(--color-primary); }
.status-overdue { background: #FFEBEE; color: #C62828; }
.row-progress-mini {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--color-text);
}
.mini-bar { width: 60px; height: 4px; background: var(--color-bg); border-radius: 2px; overflow: hidden; }
.mini-bar-fill { height: 100%; border-radius: 2px; }

/* ===== RIGHT PANEL ===== */
.right-panel {
  background: var(--color-white);
  border-left: 1px solid var(--color-border);
  overflow-y: auto; padding: 24px 20px;
  display: flex; flex-direction: column; gap: 20px;
}
.widget { background: var(--color-bg); border-radius: var(--radius); padding: 18px; }
.widget-title {
  font-size: 14px; font-weight: 700; color: var(--color-dark);
  margin-bottom: 14px; display: flex; align-items: center; gap: 8px;
}
.calendar-grid {
  display: grid; grid-template-columns: repeat(7, 1fr);
  gap: 4px; text-align: center; font-size: 12px;
}
.cal-day-name { font-weight: 600; color: var(--color-text-secondary); font-size: 11px; padding-bottom: 4px; }
.cal-day {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 500; color: var(--color-text);
  margin: 0 auto; cursor: pointer; transition: all 0.15s;
}
.cal-day:hover { background: var(--color-border); }
.cal-day.today { background: var(--color-primary); color: white; font-weight: 700; }
.cal-day.has-event { position: relative; }
.cal-day.has-event::after {
  content: ''; position: absolute; bottom: 2px;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--color-primary);
}
.cal-day.today.has-event::after { background: white; }
.cal-day.other-month { color: #ccc; }

.event-list { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.event-item { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; }
.event-dot { width: 8px; height: 8px; border-radius: 50%; margin-top: 5px; flex-shrink: 0; }
.event-time { font-size: 11px; color: var(--color-text-secondary); }

.progress-circle-wrap { display: flex; align-items: center; gap: 20px; margin-bottom: 12px; }
.progress-circle { position: relative; width: 80px; height: 80px; flex-shrink: 0; }
.progress-circle svg { transform: rotate(-90deg); }
.progress-circle .percent {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: var(--color-dark);
}
.progress-stats { display: flex; flex-direction: column; gap: 4px; }
.progress-stat { font-size: 13px; display: flex; align-items: center; gap: 6px; }
.progress-stat .dot { width: 8px; height: 8px; border-radius: 50%; }

.rating-list { display: flex; flex-direction: column; gap: 10px; }
.rating-item { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.rating-rank {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--color-bg); font-weight: 700; font-size: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-secondary); border: 1px solid var(--color-border);
}
.rating-rank.top { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.rating-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  font-size: 11px; font-weight: 600;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.rating-name { font-weight: 600; color: var(--color-dark); flex: 1; }
.rating-score { font-weight: 700; color: var(--color-text-secondary); font-size: 12px; }
.rating-item.me { background: var(--color-primary-light); margin: 0 -18px; padding: 8px 18px; border-radius: var(--radius-sm); }

.chat-widget {
  background: var(--color-white); border-radius: var(--radius);
  border: 1px solid var(--color-border); overflow: hidden; margin-top: auto;
}
.chat-header {
  background: var(--color-dark); color: white;
  padding: 12px 16px; font-size: 14px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
}
.chat-header .online-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-success); }
.chat-messages { padding: 12px 16px; max-height: 160px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; }
.chat-msg { max-width: 85%; padding: 8px 12px; border-radius: 12px; font-size: 13px; line-height: 1.4; }
.chat-msg.bot { background: var(--color-bg); color: var(--color-text); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg.user { background: var(--color-primary); color: white; align-self: flex-end; border-bottom-right-radius: 4px; }
.chat-input {
  display: flex; border-top: 1px solid var(--color-border);
  padding: 8px 12px; gap: 8px; align-items: center;
}
.chat-input input { flex: 1; border: none; outline: none; font-family: var(--font); font-size: 13px; color: var(--color-text); }
.chat-input button {
  width: 32px; height: 32px; border-radius: 50%; border: none;
  background: var(--color-primary); color: white;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s;
}
.chat-input button:hover { background: var(--color-primary-hover); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 14px; border: none;
  transition: all 0.15s; cursor: pointer; line-height: 1;
}
.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-secondary { background: var(--color-white); color: var(--color-dark); border: 1px solid var(--color-border); }
.btn-secondary:hover { background: var(--color-bg); }
.btn-dark { background: var(--color-dark); color: white; }
.btn-dark:hover { background: #000; }
.btn-ghost { background: transparent; color: var(--color-text); }
.btn-ghost:hover { background: var(--color-bg); }
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-sm { padding: 7px 14px; font-size: 13px; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #ddd; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #bbb; }

/* ===== GENERIC CARD ===== */
.card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--color-card-shadow);
  padding: 24px;
}
.card-title {
  font-size: 16px; font-weight: 700; color: var(--color-dark);
  margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}

/* ===== TABS ===== */
.tabs {
  display: flex; gap: 4px; border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}
.tab {
  padding: 10px 16px; font-size: 14px; font-weight: 600;
  color: var(--color-text-secondary); cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: all 0.15s;
}
.tab:hover { color: var(--color-text); }
.tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* ===== FORM ===== */
.form-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-field label { font-size: 13px; font-weight: 600; color: var(--color-dark); }
.form-input, .form-select, .form-textarea {
  padding: 10px 14px; border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); font-family: var(--font);
  font-size: 14px; color: var(--color-text); outline: none;
  transition: border-color 0.15s; background: var(--color-white);
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--color-primary); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-hint { font-size: 12px; color: var(--color-text-secondary); }

/* ===== NOTE ===== */
.prototype-note {
  position: fixed; bottom: 16px; right: 16px;
  background: var(--color-dark); color: white;
  padding: 10px 16px; border-radius: 8px;
  font-size: 12px; opacity: 0.9; z-index: 999;
  display: flex; align-items: center; gap: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.prototype-note a { color: var(--color-primary); font-weight: 600; }