/* =============================================
   DASHBOARD CSS — LeetCode-style progress dashboard
   ============================================= */

.dashboard-main {
  padding: var(--space-5) 0 var(--space-6);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.dashboard-greeting h1 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  background: linear-gradient(120deg, #e4e9f5, #8fa8d8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.dashboard-greeting p {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.dashboard-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Metrics Strip */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.metric-card {
  background: linear-gradient(145deg, rgba(18,32,55,0.95), rgba(10,20,38,0.97));
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 45px rgba(0,0,0,0.3);
}

.metric-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
}

.metric-card.blue::after   { background: linear-gradient(90deg, #3b7fff, #6b56ff); }
.metric-card.green::after  { background: linear-gradient(90deg, #1db587, #0d8c66); }
.metric-card.yellow::after { background: linear-gradient(90deg, #f6a935, #ffcc60); }
.metric-card.purple::after { background: linear-gradient(90deg, #a855f7, #6b56ff); }
.metric-card.red::after    { background: linear-gradient(90deg, #f25f6d, #ff8a95); }
.metric-card.teal::after   { background: linear-gradient(90deg, #06b6d4, #3b7fff); }

.metric-label {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.metric-value {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text);
}

.metric-sub {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

/* Overall Progress Ring */
.progress-overview {
  background: linear-gradient(145deg, rgba(18,32,55,0.97), rgba(10,20,38,0.99));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  align-items: center;
}

@media (max-width: 640px) {
  .progress-overview { grid-template-columns: 1fr; justify-items: center; }
}

.ring-container {
  position: relative;
  width: 140px;
  height: 140px;
}

.progress-ring {
  transform: rotate(-90deg);
  width: 140px;
  height: 140px;
}

.ring-bg {
  fill: none;
  stroke: rgba(92,162,255,0.1);
  stroke-width: 10;
}

.ring-fill {
  fill: none;
  stroke: url(#ringGradient);
  stroke-width: 10;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s ease;
}

.ring-center-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ring-percentage {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(120deg, #fff, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ring-label {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.overview-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.overview-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.stat-label { font-size: 0.9rem; color: var(--muted); }
.stat-value { font-size: 0.9rem; font-weight: 700; }

.diff-bars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.diff-bar-item { display: flex; flex-direction: column; gap: 0.35rem; }
.diff-bar-label { font-size: 0.78rem; color: var(--muted); display: flex; justify-content: space-between; }

.diff-bar-track {
  height: 6px;
  background: rgba(30,50,80,0.6);
  border-radius: 999px;
  overflow: hidden;
}

.diff-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.8s ease;
}

.diff-bar-fill.easy   { background: linear-gradient(90deg, #1db587, #7de8c6); }
.diff-bar-fill.medium { background: linear-gradient(90deg, #f6a935, #ffcc60); }
.diff-bar-fill.hard   { background: linear-gradient(90deg, #f25f6d, #ffb0b9); }

/* Sections & Topics */
.sections-dashboard {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.section-progress-card {
  background: linear-gradient(150deg, rgba(16,28,50,0.97), rgba(10,18,36,0.99));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  cursor: pointer;
  transition: background 0.18s ease;
  gap: var(--space-3);
}

.section-header:hover { background: rgba(92,162,255,0.05); }

.section-header-left { display: flex; flex-direction: column; gap: 0.25rem; }

.section-name { font-size: 1rem; font-weight: 700; }

.section-prog-text {
  font-size: 0.82rem;
  color: var(--muted);
}

.section-prog-bar {
  flex: 1;
  max-width: 200px;
}

.section-chevron {
  font-size: 0.7rem;
  color: var(--muted);
  transition: transform 0.2s ease;
}

.section-header[aria-expanded="true"] .section-chevron {
  transform: rotate(180deg);
}

.topics-panel {
  border-top: 1px solid rgba(36,50,74,0.6);
  padding: var(--space-3);
  display: none;
  flex-direction: column;
  gap: var(--space-2);
}

.topics-panel.open { display: flex; }

.topic-progress-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.7rem var(--space-3);
  border-radius: 10px;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
}

.topic-progress-row:hover {
  background: rgba(92,162,255,0.06);
  border-color: rgba(92,162,255,0.2);
}

.topic-status-icon {
  width: 28px;
  min-width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.topic-status-icon.completed {
  background: rgba(29,181,135,0.2);
  border: 1.5px solid rgba(29,181,135,0.5);
  color: #7de8c6;
}

.topic-status-icon.in_progress {
  background: rgba(238,179,62,0.2);
  border: 1.5px solid rgba(238,179,62,0.5);
  color: #ffd58f;
}

.topic-status-icon.not_started {
  background: rgba(60,85,130,0.3);
  border: 1.5px solid rgba(80,110,160,0.4);
  color: var(--muted);
}

.topic-details { flex: 1; min-width: 0; }
.topic-name-dash { font-size: 0.92rem; font-weight: 600; }
.topic-stats-dash { font-size: 0.79rem; color: var(--muted); margin-top: 0.15rem; }

.topic-mini-bar {
  width: 80px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-align: right;
}

.topic-pct {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
}

.topic-mini-track {
  height: 4px;
  background: rgba(30,50,80,0.7);
  border-radius: 999px;
  overflow: hidden;
}

.topic-mini-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  border-radius: 999px;
  transition: width 0.7s ease;
}

/* Recent Activity */
.recent-activity-card {
  background: linear-gradient(150deg, rgba(16,28,50,0.97), rgba(10,18,36,0.99));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin-bottom: var(--space-5);
}

.recent-activity-card h2 {
  margin: 0 0 var(--space-3);
  font-size: 1rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}

.activity-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.65rem var(--space-2);
  border-radius: 8px;
  transition: background 0.15s ease;
  text-decoration: none;
  color: var(--text);
}

.activity-item:hover { background: rgba(255,255,255,0.04); }

.activity-mode-badge {
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.activity-mode-badge.scenario {
  background: rgba(92,162,255,0.12);
  color: var(--accent);
  border: 1px solid rgba(92,162,255,0.3);
}

.activity-mode-badge.mcq {
  background: rgba(29,181,135,0.12);
  color: #7de8c6;
  border: 1px solid rgba(29,181,135,0.3);
}

.activity-title { font-size: 0.9rem; flex: 1; }
.activity-topic { font-size: 0.78rem; color: var(--muted); }

/* Guest CTA */
.guest-cta-card {
  background: linear-gradient(135deg, rgba(30,50,100,0.8), rgba(15,25,50,0.9));
  border: 1px solid rgba(92,162,255,0.3);
  border-radius: var(--radius);
  padding: var(--space-5);
  text-align: center;
  margin-bottom: var(--space-5);
}

.guest-cta-card h2 {
  margin: 0 0 0.75rem;
  font-size: 1.4rem;
  background: linear-gradient(120deg, #fff, #93a3c2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.guest-cta-card p {
  color: var(--muted);
  margin: 0 0 var(--space-4);
}

.guest-cta-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

.dashboard-empty {
  text-align: center;
  padding: var(--space-6) 0;
  color: var(--muted);
}
.dashboard-empty .big-icon { font-size: 3rem; margin-bottom: var(--space-3); }