@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&family=Share+Tech+Mono&display=swap');

:root {
  --bg-main: #f5f7fa;
  --bg-card: #ffffff;
  --bg-subtle: #f0f3f7;
  --border-color: #e4e9f0;
  --accent: #bb2126;
  --accent-dark: #9e1c22;
  --accent-light: #fde8e9;
  --accent-glow: rgba(187, 33, 38, 0.12);
  --text-primary: #1a2332;
  --text-secondary: #5a6a7e;
  --text-muted: #8b99a8;
  --online-color: #0d9f6e;
  --online-light: #e6f7f1;
  --offline-color: #d63031;
  --offline-light: #fdeaea;
  --shadow-sm: 0 1px 3px rgba(26, 35, 50, 0.05);
  --shadow-md: 0 4px 16px rgba(26, 35, 50, 0.07);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 0.2s ease;
}

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

html {
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  overflow: hidden;
  height: 100%;
  width: 100%;
  -webkit-font-smoothing: antialiased;
}

#app {
  width: 100%;
  height: 100%;
  max-height: 100vh;
  display: flex;
  overflow: hidden;
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.75rem;
  transition: var(--transition);
}

/* ── Login Screen ── */
.login-prompt-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: 1.5rem;
  background: var(--bg-main);
  overflow: hidden;
}

.login-prompt-container .card {
  max-width: 420px;
  width: 100%;
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  text-align: center;
  animation: floatIn 0.4s ease forwards;
}

.login-brand-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.brand-logo-img {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.login-brand-row .brand-logo-img {
  width: 48px;
  height: 48px;
}

.login-logo {
  width: 48px;
  height: 48px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: white;
  flex-shrink: 0;
}

.login-brand-text {
  text-align: left;
}

.login-brand-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  line-height: 1.2;
}

.login-brand-sub {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
}

.login-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.login-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

/* ── Dashboard Layout ── */
.dashboard-wrapper {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  max-height: 100vh;
  padding: 1.25rem 1.5rem;
  box-sizing: border-box;
  overflow: hidden;
  animation: fadeIn 0.35s ease-out;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 38px;
  height: 38px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: white;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.brand-name {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent);
}

.main-grid {
  display: grid;
  grid-template-columns: minmax(220px, 260px) 1fr;
  gap: 1rem;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ── Profile Card ── */
.profile-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  justify-content: flex-start;
  padding-top: 1rem;
}

.avatar-container {
  position: relative;
  margin-bottom: 1.25rem;
}

.avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-light);
  padding: 3px;
  background: var(--bg-subtle);
}

.status-indicator {
  position: absolute;
  bottom: 6px;
  right: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2.5px solid #fff;
}

.status-indicator.online {
  background-color: var(--online-color);
  animation: pulseGreen 2s infinite;
}

.status-indicator.offline {
  background-color: var(--offline-color);
  animation: pulseRed 2s infinite;
}

.student-name {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.student-code {
  background: var(--accent-light);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-top: 0.4rem;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(187, 33, 38, 0.15);
  letter-spacing: 0.3px;
  display: inline-block;
}

.student-email {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border-color);
  margin: 1.25rem 0;
}

.profile-info-row {
  display: flex;
  justify-content: space-between;
  width: 100%;
  font-size: 0.82rem;
  margin-bottom: 0.6rem;
}

.profile-info-row span {
  color: var(--text-muted);
}

.profile-info-row strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ── Right Column ── */
.right-column {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  overflow: hidden;
  height: 100%;
  min-height: 0;
}

.status-banner {
  padding: 0.75rem 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  border-left: 3px solid var(--accent);
  flex-shrink: 0;
}

.status-banner-main {
  flex: 1;
  min-width: 0;
}

.status-banner-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.65rem;
  margin-bottom: 0.25rem;
}

.monitor-mode-tag {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: var(--accent-light);
  color: var(--accent);
}

.status-class-line {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.status-banner-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.status-banner.mode-learning { border-left-color: var(--online-color); }
.status-banner.mode-learning .monitor-mode-tag { background: var(--online-light); color: var(--online-color); }
.status-banner.mode-outside { border-left-color: #94a3b8; }
.status-banner.mode-outside .monitor-mode-tag { background: #f1f5f9; color: #64748b; }
.status-banner.mode-config { border-left-color: #f59e0b; }
.status-banner.mode-config .monitor-mode-tag { background: #fffbeb; color: #b45309; }
.status-banner.mode-exam { border-left-color: #7c3aed; }
.status-banner.mode-exam .monitor-mode-tag { background: #f5f3ff; color: #6d28d9; }

.exam-panel {
  border: 1px solid #c4b5fd;
  background: linear-gradient(135deg, #faf5ff 0%, #fff 100%);
  padding: 1rem 1.15rem;
  margin-bottom: 0.75rem;
}

.exam-panel-desc {
  margin: 0 0 0.85rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.exam-panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.exam-wait, .exam-done {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.exam-resources {
  margin-top: 0.9rem;
  padding-top: 0.85rem;
  border-top: 1px dashed #c4b5fd;
}

.exam-resources-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #6d28d9;
  margin-bottom: 0.5rem;
}

.exam-resource-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid #ede9fe;
}

.exam-resource-row:last-child {
  border-bottom: none;
}

.exam-resource-name {
  font-size: 0.84rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.exam-resource-btns {
  display: flex;
  gap: 0.35rem;
  flex-shrink: 0;
}

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

.stats-grid--two {
  grid-template-columns: 1fr 1fr;
}

.connectivity-note {
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--text-muted);
  padding: 0.65rem 0.85rem;
  background: #f8fafc;
  border: 1px solid var(--border-color);
}

.connectivity-note strong {
  color: var(--text-primary);
}

.conn-split {
  font-weight: 600;
  color: var(--online-color);
}

.conn-split.offline-text {
  color: var(--offline-color);
}

.card-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  flex-shrink: 0;
}

.card-title-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: monospace;
}

.card-title-row--shifts {
  margin-bottom: 0.2rem;
  flex-wrap: nowrap;
  gap: 0.35rem 0.5rem;
  align-items: center;
}

.clock-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-left: auto;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.clock-inline-item {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

.clock-inline-item strong {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
}

.clock-inline-item strong.online { color: var(--online-color); }
.clock-inline-item strong.offline { color: var(--offline-color); }

.clock-inline-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
}

.clock-inline-dot.online { background: var(--online-color); }
.clock-inline-dot.offline { background: var(--offline-color); }

.clock-inline-sep {
  opacity: 0.35;
  font-size: 0.65rem;
}

.card-title-row--shifts .card-title-sub {
  font-size: 0.62rem;
  margin-left: 0.35rem;
  white-space: nowrap;
}

/* Student chat — modal 2 panel giống web */
.student-chat-dock {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 2000;
  pointer-events: none;
}

.student-chat-dock > * {
  pointer-events: auto;
}

.student-chat-fab {
  position: relative;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1.15rem;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.28);
}

.student-chat-fab.is-hidden {
  display: none;
}

.student-chat-fab--pulse {
  animation: chat-fab-pulse 0.6s ease 2;
}

@keyframes chat-fab-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(187, 33, 38, 0.25); }
}

.student-chat-badge {
  position: absolute;
  top: -3px;
  right: -3px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  background: #ef4444;
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 18px;
}

.student-chat-modal {
  display: none;
  position: absolute;
  right: 0;
  bottom: 60px;
  width: min(560px, calc(100vw - 32px));
  height: min(440px, calc(100vh - 100px));
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.38);
  flex-direction: column;
  overflow: hidden;
}

.student-chat-modal.is-open {
  display: flex;
}

.student-chat-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  font-size: 0.88rem;
}

.student-chat-close {
  border: none;
  background: transparent;
  color: var(--text-muted);
  width: 30px;
  height: 30px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
}

.student-chat-close:hover {
  background: rgba(187, 33, 38, 0.12);
  color: var(--accent);
}

.student-chat-modal-body {
  flex: 1;
  min-height: 0;
  display: flex;
  overflow: hidden;
}

.student-chat-sidebar {
  width: 200px;
  flex-shrink: 0;
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  overscroll-behavior: contain;
  background: rgba(0, 0, 0, 0.06);
}

.student-chat-conv-row {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  padding: 0.7rem 0.75rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.student-chat-conv-row:hover {
  background: rgba(255, 255, 255, 0.04);
}

.student-chat-conv-row.active {
  background: rgba(187, 33, 38, 0.12);
  border-left: 3px solid var(--accent);
}

.student-chat-conv-name {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
}

.student-chat-conv-unread {
  font-style: normal;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 0 5px;
  font-size: 0.6rem;
  font-weight: 700;
  flex-shrink: 0;
}

.student-chat-conv-preview {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.student-chat-thread {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.student-chat-thread-head {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  font-weight: 600;
  flex-shrink: 0;
}

.student-chat-messages {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.65rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: rgba(0, 0, 0, 0.06);
}

.student-chat-empty {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
  padding: 1.5rem 0.75rem;
}

.student-chat-bubble {
  max-width: 82%;
  font-size: 0.8rem;
}

.student-chat-bubble--staff { align-self: flex-start; }
.student-chat-bubble--student { align-self: flex-end; }

.student-chat-body {
  padding: 0.45rem 0.6rem;
  border-radius: 12px;
  line-height: 1.4;
  word-break: break-word;
}

.student-chat-bubble--staff .student-chat-body {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
}

.student-chat-bubble--student .student-chat-body {
  background: var(--accent);
  color: #fff;
}

.student-chat-time {
  font-size: 0.6rem;
  color: var(--text-muted);
  margin-top: 0.12rem;
  padding: 0 0.2rem;
}

.student-chat-compose {
  display: flex;
  gap: 0.45rem;
  padding: 0.55rem 0.7rem;
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
  background: var(--bg-card);
}

.student-chat-compose input {
  flex: 1;
  font-size: 0.8rem;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-base);
  color: var(--text-primary);
}

.shifts-wrap {
  flex: 1;
  min-height: 0;
  overflow: auto;
}

.shifts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
}

.shifts-table th {
  text-align: left;
  padding: 0.4rem 0.35rem;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background: #fff;
}

.shifts-table td {
  padding: 0.45rem 0.35rem;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: middle;
}

.shift-row-active {
  background: #f0fdf8;
}

.shift-now {
  font-size: 0.65rem;
  color: var(--online-color);
  font-weight: 700;
  text-transform: uppercase;
}

.shift-time {
  font-family: monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.time-online { color: var(--online-color); font-family: monospace; font-weight: 600; }
.time-offline { color: var(--offline-color); font-family: monospace; }

.att-badge {
  display: inline-block;
  padding: 0.12rem 0.4rem;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 600;
  white-space: nowrap;
}

.att-ok { background: var(--online-light); color: var(--online-color); }
.att-late { background: #fffbeb; color: #b45309; }
.att-leave { background: #eff6ff; color: #2563eb; }
.att-absent { background: var(--offline-light); color: var(--offline-color); }
.att-pending { background: #f1f5f9; color: #64748b; }

.shifts-empty {
  padding: 1rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.status-banner-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.status-banner-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.status-banner-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
}

.stat-icon-wrap {
  width: 40px;
  height: 40px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.stat-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.stat-title {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Clocks ── */
.clocks-card {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  padding: 0.5rem 0.65rem;
}

.card-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.2px;
  flex-shrink: 0;
}

.clock-display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  flex: 1;
  min-height: 0;
}

.clock-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.85rem;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.clock-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.4rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.clock-value {
  font-size: clamp(1.4rem, 3.5vw, 1.85rem);
  font-weight: 800;
  font-family: 'Share Tech Mono', monospace;
  letter-spacing: 1px;
}

.clock-value.online {
  color: var(--online-color);
}

.clock-value.offline {
  color: var(--offline-color);
}

/* ── Buttons ── */
.btn {
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-sm);
  border: none;
  font-weight: 600;
  font-size: 0.875rem;
  font-family: 'Be Vietnam Pro', sans-serif;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(187, 33, 38, 0.25);
}

.btn-logout {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 0.9rem;
  font-size: 0.82rem;
}

.btn-logout:hover {
  background: var(--offline-light);
  color: var(--offline-color);
  border-color: rgba(214, 48, 49, 0.25);
}

/* ── Animations ── */
@keyframes floatIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulseGreen {
  0% { box-shadow: 0 0 0 0 rgba(13, 159, 110, 0.35); }
  70% { box-shadow: 0 0 0 8px rgba(13, 159, 110, 0); }
  100% { box-shadow: 0 0 0 0 rgba(13, 159, 110, 0); }
}

@keyframes pulseRed {
  0% { box-shadow: 0 0 0 0 rgba(214, 48, 49, 0.35); }
  70% { box-shadow: 0 0 0 8px rgba(214, 48, 49, 0); }
  100% { box-shadow: 0 0 0 0 rgba(214, 48, 49, 0); }
}