/* ==========================================================================
   NeedTech IT — Student Dashboard, Learning Player & Certificate
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Student Dashboard SaaS Layout (dashboard.html)
   -------------------------------------------------------------------------- */
.dashboard-body {
  background-color: var(--nt-bg);
  min-height: 100vh;
}

.dashboard-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.dashboard-sidebar {
  background: var(--nt-surface);
  border-right: 1px solid var(--nt-border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 200;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px 24px 12px;
  border-bottom: 1px solid var(--nt-border-light);
  margin-bottom: 20px;
}

.sidebar-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-grow: 1;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--nt-text-muted);
  transition: all var(--transition-fast);
}

.sidebar-link:hover {
  background: var(--nt-surface-muted);
  color: var(--nt-primary);
}

.sidebar-link.active {
  background: var(--nt-primary-10);
  color: var(--nt-primary);
}

.sidebar-icon {
  font-size: 1.2rem;
  width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.user-profile-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: var(--nt-surface-muted);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--nt-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.user-details {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.user-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--nt-text-heading);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  font-size: 0.75rem;
  color: var(--nt-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Dashboard Main Content */
.dashboard-main {
  padding: 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  overflow-y: auto;
}

.dashboard-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.welcome-msg h1 {
  font-size: 1.85rem;
  margin-bottom: 4px;
}

.welcome-msg p {
  color: var(--nt-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

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

/* Metric Stats Row */
.dash-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.dash-metric-card {
  background: var(--nt-surface);
  border: 1px solid var(--nt-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-xs);
}

.metric-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.metric-icon-blue { background: var(--nt-primary-10); color: var(--nt-primary); }
.metric-icon-green { background: var(--nt-success-light); color: var(--nt-success); }
.metric-icon-amber { background: var(--nt-warning-light); color: var(--nt-warning); }
.metric-icon-cyan { background: var(--nt-secondary-10); color: #0284c7; }

.metric-data strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--nt-text-heading);
  line-height: 1.1;
}

.metric-data span {
  font-size: 0.85rem;
  color: var(--nt-text-muted);
}

/* My Courses Section */
.dash-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.enrolled-courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.enrolled-course-card {
  background: var(--nt-surface);
  border: 1px solid var(--nt-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.enrolled-thumb-wrap {
  aspect-ratio: 16/9;
  position: relative;
  background-color: var(--nt-dark);
}

.enrolled-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.enrolled-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.progress-info-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--nt-text-muted);
  margin-bottom: 8px;
  margin-top: 14px;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: var(--nt-surface-muted);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 18px;
}

.progress-fill {
  height: 100%;
  background: var(--nt-gradient-primary);
  border-radius: var(--radius-pill);
}

/* --------------------------------------------------------------------------
   2. Course Learning Player Interface (player.html)
   -------------------------------------------------------------------------- */
.player-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: #0B1120;
  color: #fff;
  overflow: hidden;
}

.player-header {
  height: 64px;
  background: #0F172A;
  border-bottom: 1px solid #1E293B;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
}

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

.back-to-course-btn {
  color: #94A3B8;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
}

.back-to-course-btn:hover {
  color: #fff;
}

.player-course-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  border-left: 1px solid #334155;
  padding-left: 16px;
}

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

/* Player Body Split (Video + Playlist) */
.player-body {
  display: grid;
  grid-template-columns: 1fr 380px;
  flex-grow: 1;
  overflow: hidden;
}

.player-stage {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background: #0B1120;
}

.video-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  max-height: 70vh;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-mockup-screen {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-mockup-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.video-center-play {
  position: absolute;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--nt-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  cursor: pointer;
  box-shadow: 0 0 30px rgba(11, 95, 255, 0.6);
  transition: transform var(--transition-fast);
}

.video-center-play:hover {
  transform: scale(1.1);
}

.video-controls-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
}

/* Lesson Notes & Tabs */
.player-tabs-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 32px;
  border-bottom: 1px solid #1E293B;
  background: #0F172A;
}

.player-tab-btn {
  background: none;
  border: none;
  color: #94A3B8;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 16px 0;
  cursor: pointer;
  position: relative;
}

.player-tab-btn.active {
  color: #fff;
}

.player-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--nt-primary);
}

.player-tab-content {
  padding: 24px 32px;
  color: #CBD5E1;
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Playlist Sidebar */
.player-curriculum-sidebar {
  background: #0F172A;
  border-left: 1px solid #1E293B;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-playlist-header {
  padding: 18px 20px;
  border-bottom: 1px solid #1E293B;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.playlist-section-title {
  padding: 14px 20px;
  background: #1E293B;
  font-size: 0.85rem;
  font-weight: 700;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.playlist-lesson-item {
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: background var(--transition-fast);
  color: #E2E8F0;
  font-size: 0.9rem;
}

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

.playlist-lesson-item.active {
  background: rgba(11, 95, 255, 0.15);
  border-left: 3px solid var(--nt-primary);
  color: #fff;
}

.playlist-lesson-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lesson-check-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid #64748B;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
}

.playlist-lesson-item.completed .lesson-check-icon {
  background: var(--nt-success);
  border-color: var(--nt-success);
  color: #fff;
}

/* --------------------------------------------------------------------------
   3. Certificate Verification Interface (certificate.html)
   -------------------------------------------------------------------------- */
.certificate-preview-section {
  padding: 4rem 0 5rem 0;
  background: var(--nt-bg);
}

.certificate-actions-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.certificate-frame {
  background: #fff;
  border: 12px solid #0F172A;
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-lg);
  padding: 48px;
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  background-image: 
    radial-gradient(circle at center, rgba(11, 95, 255, 0.03) 0%, transparent 70%);
}

.certificate-inner-border {
  border: 2px solid var(--nt-border);
  padding: 40px;
  text-align: center;
  position: relative;
}

.certificate-logo-wrap {
  margin-bottom: 1.5rem;
}

.cert-tagline {
  font-size: 0.85rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--nt-text-muted);
  margin-bottom: 1.5rem;
}

.cert-recipient-text {
  font-size: 1rem;
  color: var(--nt-text-muted);
  margin-bottom: 0.5rem;
}

.cert-recipient-name {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--nt-text-heading);
  text-decoration: underline;
  text-decoration-color: var(--nt-primary);
  text-underline-offset: 8px;
  margin-bottom: 1.5rem;
}

.cert-course-name {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--nt-primary);
  margin-bottom: 1.5rem;
}

.cert-signatures-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  margin-top: 3.5rem;
  padding-top: 2rem;
}

.signature-block {
  text-align: center;
  width: 200px;
}

.sig-line {
  border-top: 1.5px solid var(--nt-text-heading);
  margin-top: 40px;
  padding-top: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--nt-text-heading);
}

.sig-role {
  font-size: 0.75rem;
  color: var(--nt-text-muted);
}

.cert-security-seal {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 3px dashed var(--nt-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--nt-primary);
  text-transform: uppercase;
  margin: 0 auto;
}