/* ============================================================
   Level Up – Main Stylesheet
   Dark Glassmorphism Design
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ── CSS Variables ──────────────────────────────────────── */
:root {
  --bg-dark:       #080b14;
  --bg-card:       rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --bg-glass:      rgba(12,18,35,0.75);
  --border:        rgba(255,255,255,0.08);
  --border-glow:   rgba(0,245,212,0.3);

  --accent:        #00F5D4;
  --accent2:       #7C3AED;
  --accent3:       #F59E0B;
  --danger:        #EF4444;
  --success:       #10B981;
  --warning:       #F59E0B;

  --text-primary:   #F0F4FF;
  --text-secondary: #8892A4;
  --text-muted:     #4A5568;

  --font-display: 'Orbitron', monospace;
  --font-heading: 'Rajdhani', sans-serif;
  --font-body:    'Inter', sans-serif;

  --sidebar-w: 260px;
  --radius:    12px;
  --radius-lg: 20px;

  --glow-accent: 0 0 20px rgba(0,245,212,0.25);
  --glow-purple: 0 0 20px rgba(124,58,237,0.25);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
}

/* ── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

/* Animated background grid */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,245,212,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,245,212,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* Ambient glow orbs */
body::after {
  content: '';
  position: fixed;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.08) 0%, transparent 70%);
  top: -200px; right: -200px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: #fff; }
img { max-width: 100%; }
input, textarea, select, button { font-family: var(--font-body); }

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--accent2); border-radius: 3px; }

/* ── Layout ─────────────────────────────────────────────── */
.app-layout {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-logo {
  padding: 28px 24px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo .logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  text-shadow: var(--glow-accent);
}

.sidebar-logo .logo-sub {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-top: 2px;
}

/* User badge in sidebar */
.sidebar-user {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  object-fit: cover;
  box-shadow: var(--glow-accent);
}

.sidebar-user-info .name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.sidebar-user-info .rank {
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Nav */
.sidebar-nav {
  flex: 1;
  padding: 16px 0;
  overflow-y: auto;
}

.nav-section-label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  padding: 12px 24px 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 24px;
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-card);
  border-left-color: var(--accent);
}

.nav-link.active {
  color: var(--accent);
  background: rgba(0,245,212,0.06);
  border-left-color: var(--accent);
}

.nav-link .icon {
  width: 18px; height: 18px;
  stroke-width: 2;
}

.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 20px;
  font-family: var(--font-body);
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

/* ── Main Content ────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 32px;
  position: relative;
  z-index: 1;
}

/* ── Top Header ──────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.page-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 1px;
}

.page-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
  font-family: var(--font-heading);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--glow-accent);
  transform: translateY(-2px);
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.card:hover::before { opacity: 0.5; }

/* Stat Cards */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-glow);
}

.stat-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.stat-icon-wrap svg { width: 24px; height: 24px; }

.stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-weight: 600;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin-top: 4px;
}

.stat-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── Progress Circle ────────────────────────────────────── */
.progress-circle-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.progress-circle {
  position: relative;
  width: 120px; height: 120px;
}

.progress-circle svg {
  transform: rotate(-90deg);
  width: 100%; height: 100%;
}

.progress-circle .track {
  fill: none;
  stroke: rgba(255,255,255,0.06);
  stroke-width: 8;
}

.progress-circle .fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  transition: stroke-dashoffset 1.2s cubic-bezier(.4,0,.2,1);
  filter: drop-shadow(0 0 6px var(--accent));
}

.progress-circle-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.progress-circle-pct {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.progress-circle-sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #080b14;
  box-shadow: 0 4px 15px rgba(0,245,212,0.3);
}
.btn-primary:hover {
  background: #00ddc0;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,245,212,0.4);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-danger {
  background: rgba(239,68,68,0.15);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.3);
}
.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn-purple {
  background: var(--accent2);
  color: #fff;
  box-shadow: 0 4px 15px rgba(124,58,237,0.3);
}
.btn-purple:hover {
  background: #6d28d9;
  transform: translateY(-1px);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ── Forms ───────────────────────────────────────────────── */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-control {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all 0.2s ease;
  outline: none;
}

.form-control:focus {
  border-color: var(--accent);
  background: rgba(0,245,212,0.04);
  box-shadow: 0 0 0 3px rgba(0,245,212,0.1);
}

.form-control::placeholder { color: var(--text-muted); }

.form-control.error { border-color: var(--danger); }

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.form-error {
  font-size: 0.78rem;
  color: var(--danger);
  margin-top: 6px;
  display: none;
}

/* ── Alerts ──────────────────────────────────────────────── */
.alert {
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 0.9rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: fadeSlideIn 0.3s ease;
}

.alert-success { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: #34D399; }
.alert-error   { background: rgba(239,68,68,0.1);  border: 1px solid rgba(239,68,68,0.3);  color: #FC8181; }
.alert-info    { background: rgba(0,245,212,0.1);  border: 1px solid rgba(0,245,212,0.3);  color: var(--accent); }

/* ── Badges / Tags ───────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 20px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.badge-success { background: rgba(16,185,129,0.15); color: var(--success); border: 1px solid rgba(16,185,129,0.3); }
.badge-danger  { background: rgba(239,68,68,0.15);  color: var(--danger);  border: 1px solid rgba(239,68,68,0.3); }
.badge-accent  { background: rgba(0,245,212,0.1);   color: var(--accent);  border: 1px solid rgba(0,245,212,0.3); }
.badge-gold    { background: rgba(245,158,11,0.15); color: var(--accent3); border: 1px solid rgba(245,158,11,0.3); }

/* ── Tables ──────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
}

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

thead th {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

tbody tr {
  border-bottom: 1px solid rgba(255,255,255,0.03);
  transition: background 0.15s;
}

tbody tr:hover { background: var(--bg-card); }

tbody td {
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ── Progress Bar ────────────────────────────────────────── */
.progress-bar-wrap {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width 1s ease;
  box-shadow: 0 0 8px rgba(0,245,212,0.5);
}

/* ── Level Cards ─────────────────────────────────────────── */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.level-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.level-card.unlocked {
  border-color: rgba(0,245,212,0.2);
}

.level-card.locked {
  opacity: 0.5;
  filter: grayscale(0.5);
}

.level-card.current {
  border-color: var(--accent);
  box-shadow: 0 0 25px rgba(0,245,212,0.15);
}

.level-card.completed {
  border-color: rgba(16,185,129,0.4);
}

.level-card-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  color: rgba(255,255,255,0.05);
  position: absolute;
  top: 10px; right: 16px;
  line-height: 1;
}

.level-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.level-badge-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}

.level-card-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.level-card-lvl {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ── Achievement Cards ───────────────────────────────────── */
.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.achievement-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
}

.achievement-card.earned {
  border-color: rgba(245,158,11,0.4);
  background: rgba(245,158,11,0.04);
}

.achievement-card.locked {
  opacity: 0.45;
  filter: grayscale(0.8);
}

.achievement-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px;
  font-size: 1.5rem;
}

.achievement-name {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.achievement-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ── Leaderboard ─────────────────────────────────────────── */
.leaderboard-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 10px;
  transition: background 0.2s;
}

.leaderboard-item:hover { background: var(--bg-card-hover); }

.leaderboard-rank {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  width: 36px;
  text-align: center;
  flex-shrink: 0;
}

.rank-1 { color: #FFD700; }
.rank-2 { color: #C0C0C0; }
.rank-3 { color: #CD7F32; }

/* ── Notifications ───────────────────────────────────────── */
.notif-btn {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 12px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.notif-btn:hover { border-color: var(--accent); color: var(--accent); }

.notif-count {
  position: absolute;
  top: -6px; right: -6px;
  background: var(--danger);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  width: 18px; height: 18px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

/* ── Modal ───────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

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

.modal {
  background: #0d1526;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 480px;
  width: 100%;
  animation: scaleIn 0.25s ease;
  position: relative;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 6px;
}

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
}
.modal-close:hover { color: var(--text-primary); }

/* ── Toast Notifications ─────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 24px; right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
  backdrop-filter: blur(20px);
  animation: toastIn 0.35s cubic-bezier(.17,.67,.35,1.2);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error   { border-left: 4px solid var(--danger); }
.toast.info    { border-left: 4px solid var(--accent); }
.toast.level   { border-left: 4px solid var(--accent3); }

.toast-icon { flex-shrink: 0; }
.toast-msg { font-size: 0.88rem; color: var(--text-primary); flex: 1; }
.toast-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 0.9rem; }

/* ── Login Page ──────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  z-index: 1;
}

.auth-card {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px;
  width: 100%;
  max-width: 440px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  position: relative;
  overflow: hidden;
}

.auth-card::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(0,245,212,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.auth-logo {
  text-align: center;
  margin-bottom: 36px;
}

.auth-logo-text {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent);
  text-shadow: var(--glow-accent);
  letter-spacing: 3px;
}

.auth-logo-sub {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-top: 4px;
}

.auth-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.auth-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ── XP Bar ──────────────────────────────────────────────── */
.xp-bar-wrap {
  background: rgba(255,255,255,0.04);
  border-radius: 20px;
  height: 8px;
  overflow: hidden;
  margin-top: 8px;
}

.xp-bar-fill {
  height: 100%;
  border-radius: 20px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  transition: width 1.5s cubic-bezier(.4,0,.2,1);
}

/* ── Exercise Check ──────────────────────────────────────── */
.exercise-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  transition: all 0.25s ease;
}

.exercise-item.completed {
  border-color: rgba(16,185,129,0.4);
  background: rgba(16,185,129,0.04);
}

.exercise-check {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
}

.exercise-item.completed .exercise-check {
  background: var(--success);
  border-color: var(--success);
}

.exercise-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  flex: 1;
}

.exercise-target {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.exercise-input {
  width: 80px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--text-primary);
  font-size: 0.9rem;
  text-align: center;
  outline: none;
}

.exercise-input:focus {
  border-color: var(--accent);
}

/* ── Chart Containers ────────────────────────────────────── */
.chart-container {
  position: relative;
  height: 280px;
}

/* ── Hamburger (mobile) ──────────────────────────────────── */
.hamburger {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  color: var(--text-secondary);
}

/* ── Utility ─────────────────────────────────────────────── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.text-accent { color: var(--accent); }
.text-muted  { color: var(--text-secondary); }
.text-sm     { font-size: 0.85rem; }
.text-xs     { font-size: 0.75rem; }
.font-heading { font-family: var(--font-heading); }
.font-display { font-family: var(--font-display); }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* ── Animations ──────────────────────────────────────────── */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(30px) scale(0.95); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(0,245,212,0.4); }
  70%  { box-shadow: 0 0 0 10px rgba(0,245,212,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,245,212,0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.pulse { animation: pulse-ring 2s infinite; }
.float { animation: float 3s ease-in-out infinite; }

/* Staggered card reveal */
.card-reveal {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeSlideIn 0.5s ease forwards;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: 20px;
  }
  .hamburger {
    display: flex;
    align-items: center;
  }
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }
  .auth-card {
    padding: 32px 24px;
  }
  .level-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Admin ───────────────────────────────────────────────── */
.admin-tag {
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

/* ── Sidebar overlay (mobile) ────────────────────────────── */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
  display: none;
}
.sidebar-overlay.open { display: block; }

/* ── Dropdown ────────────────────────────────────────────── */
.dropdown { position: relative; }

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: #0d1526;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 200px;
  z-index: 200;
  overflow: hidden;
  display: none;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
}

.dropdown-menu.open { display: block; }

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.15s;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
}

.dropdown-item:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* ── Loading Spinner ─────────────────────────────────────── */
.spinner {
  width: 24px; height: 24px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8,11,20,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: inherit;
  z-index: 10;
}

/* ── Avatar ──────────────────────────────────────────────── */
.avatar {
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.avatar-sm  { width: 32px;  height: 32px; }
.avatar-md  { width: 48px;  height: 48px; }
.avatar-lg  { width: 80px;  height: 80px; }
.avatar-xl  { width: 120px; height: 120px; }