:root {
  --bg: #f7f9fd;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #6b7488;
  --line: #e7ebf4;
  --blue: #2563eb;
  --violet: #7c3aed;
  --soft-blue: #edf4ff;
  --soft-violet: #f4efff;
  --danger: #dc2626;
  --warn: #d97706;
  --ok: #059669;
  --shadow: 0 18px 50px rgba(44, 54, 92, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family:
    "Inter", "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 24px 18px;
  background: #ffffff;
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 28px;
}

.brand-logo {
  width: 58px;
  height: 44px;
  object-fit: contain;
  border-radius: 8px;
  background: #ffffff;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #ffffff;
  font-weight: 800;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
}

.brand strong,
.brand span {
  display: block;
}

.brand strong {
  font-size: 17px;
  letter-spacing: 0;
}

.brand span,
.muted,
.eyebrow {
  color: var(--muted);
}

.brand span {
  margin-top: 2px;
  font-size: 13px;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav-item {
  width: 100%;
  padding: 12px 14px;
  color: var(--muted);
  text-align: left;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.nav-item.active,
.nav-item:hover {
  color: var(--blue);
  background: var(--soft-blue);
}

.role-box {
  margin-top: 28px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
}

.role-box label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.main {
  min-width: 0;
  padding: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 4px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 18px;
}

.today-pill {
  padding: 10px 14px;
  color: var(--blue);
  white-space: nowrap;
  border: 1px solid #dbe6ff;
  border-radius: 999px;
  background: #ffffff;
}

.view {
  display: none;
}

.view.active {
  display: grid;
  gap: 18px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metrics.compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.metric-card {
  padding: 18px;
}

.metric-card span {
  color: var(--muted);
  font-size: 14px;
}

.metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: 30px;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.two {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.panel {
  padding: 18px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-bottom: 16px;
}

.panel-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.panel-actions .muted {
  white-space: nowrap;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-grid.single {
  grid-template-columns: 1fr;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
  background: #ffffff;
}

textarea {
  min-height: 94px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: #9bb8ff;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.full,
textarea {
  grid-column: 1 / -1;
}

.field-note {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  grid-column: 1 / -1;
  margin-top: -6px;
  color: var(--muted);
  font-size: 13px;
}

.field-note span:last-child {
  white-space: nowrap;
}

.file-upload {
  display: flex;
  align-items: center;
  justify-content: center;
  grid-column: 1 / -1;
  min-height: 48px;
  padding: 10px 12px;
  color: var(--blue);
  border: 1px dashed #bfd0f8;
  border-radius: 8px;
  background: #fbfcff;
  cursor: pointer;
}

.file-upload input {
  display: none;
}

.file-list,
.attachment-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  grid-column: 1 / -1;
}

.file-list span,
.attachment-links a {
  padding: 6px 10px;
  color: var(--blue);
  font-size: 13px;
  text-decoration: none;
  border: 1px solid #dbe6ff;
  border-radius: 8px;
  background: var(--soft-blue);
}

.attachment-links span {
  color: var(--muted);
  font-size: 13px;
}

.primary {
  min-height: 44px;
  color: #ffffff;
  font-weight: 700;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  cursor: pointer;
}

.primary:hover {
  filter: brightness(1.04);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 940px;
  border-collapse: collapse;
}

th,
td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 700;
  background: #fbfcff;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 9px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
}

.badge.low {
  color: var(--ok);
  background: #e9fbf4;
}

.badge.mid {
  color: var(--warn);
  background: #fff7ed;
}

.badge.high {
  color: var(--danger);
  background: #fef2f2;
}

.stack-list,
.student-cards,
.timeline {
  display: grid;
  gap: 10px;
}

.list-item,
.student-card,
.timeline-item {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
}

.list-item strong,
.student-card strong,
.timeline-item strong {
  display: block;
  margin-bottom: 6px;
}

.list-item p,
.student-card p,
.timeline-item p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.student-cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.student-hero {
  padding: 28px;
  color: #ffffff;
  border-radius: 8px;
  background:
    linear-gradient(120deg, rgba(37, 99, 235, 0.96), rgba(124, 58, 237, 0.9)),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.34), transparent 30%);
}

.student-hero h2 {
  font-size: 30px;
}

.student-hero p {
  max-width: 600px;
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.82);
}

.student-hero .eyebrow {
  color: rgba(255, 255, 255, 0.72);
}

.form-panel {
  max-width: 720px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 10;
  transform: translateY(14px);
  padding: 12px 16px;
  color: #ffffff;
  border-radius: 8px;
  background: #172033;
  opacity: 0;
  pointer-events: none;
  transition: 0.2s ease;
  box-shadow: var(--shadow);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.empty {
  padding: 18px;
  color: var(--muted);
  text-align: center;
  border: 1px dashed #d6ddeb;
  border-radius: 8px;
  background: #fbfcff;
}

@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .nav-item {
    text-align: center;
  }

  .role-box {
    margin-top: 14px;
  }

  .main {
    padding: 20px;
  }

  .metrics,
  .metrics.compact,
  .grid.two,
  .student-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 24px;
  }

  .student-hero h2 {
    font-size: 26px;
  }

  .metric-card strong {
    font-size: 26px;
  }
}

.hidden {
  display: none !important;
}

.login-screen {
  position: relative;
  overflow: hidden;
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(118deg, rgba(15, 76, 129, 0.08), rgba(18, 182, 200, 0.08) 45%, rgba(248, 250, 252, 0.96)),
    #f7f9fd;
}

.login-screen::before {
  position: absolute;
  inset: -80px;
  content: "";
  background:
    linear-gradient(rgba(15, 76, 129, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 76, 129, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(135deg, transparent 0%, #000 18%, #000 76%, transparent 100%);
  animation: gridDrift 24s linear infinite;
}

.login-screen::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.88) 0%, transparent 28%, transparent 72%, rgba(255, 255, 255, 0.72) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.36), transparent 45%, rgba(18, 182, 200, 0.08));
  opacity: 0.95;
}

.login-visual {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.visual-card {
  position: absolute;
  width: 260px;
  min-height: 82px;
  padding: 18px 20px;
  border: 1px solid rgba(191, 208, 248, 0.78);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(248, 252, 255, 0.74));
  box-shadow: 0 24px 70px rgba(15, 76, 129, 0.1);
  backdrop-filter: blur(12px);
  animation: panelFloat 7s ease-in-out infinite;
}

.visual-card strong {
  position: relative;
  z-index: 1;
  display: block;
  max-width: 11em;
  color: #0f2746;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: 0;
}

.visual-card::before {
  display: block;
  width: 42px;
  height: 4px;
  margin-bottom: 14px;
  content: "";
  border-radius: 999px;
  background: linear-gradient(90deg, #0f4c81, #12b6c8);
}

.visual-card-a {
  top: 18%;
  left: 12%;
}

.visual-card-b {
  right: 12%;
  top: 22%;
  animation-delay: -2s;
}

.visual-card-c {
  right: 18%;
  bottom: 18%;
  animation-delay: -4s;
}

.visual-flow {
  position: absolute;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(15, 76, 129, 0.34), transparent);
  animation: flowLine 5.5s ease-in-out infinite;
}

.flow-a {
  top: 35%;
  left: 18%;
  width: 28vw;
}

.flow-b {
  right: 17%;
  bottom: 34%;
  width: 24vw;
  animation-delay: -2.2s;
}

.login-card {
  position: relative;
  z-index: 2;
  width: min(460px, 100%);
  padding: 30px 28px;
  border: 1px solid rgba(219, 230, 255, 0.95);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 28px 90px rgba(15, 76, 129, 0.14);
  backdrop-filter: blur(16px);
}

.login-brand {
  margin-bottom: 22px;
}

.login-form {
  display: grid;
  gap: 14px;
}

.login-form label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
}

.login-help {
  margin-top: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
}

.login-help strong {
  display: block;
  margin-bottom: 8px;
}

.login-help p {
  margin: 5px 0;
  color: var(--muted);
  font-size: 13px;
}

@keyframes gridDrift {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(64px, 64px, 0);
  }
}

@keyframes panelFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

@keyframes flowLine {
  0%,
  100% {
    opacity: 0.18;
    transform: translateX(-12px);
  }
  50% {
    opacity: 0.75;
    transform: translateX(14px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .login-screen::before,
  .visual-card,
  .visual-flow {
    animation: none;
  }
}

.hint-box {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid #dbe6ff;
  border-radius: 8px;
  background: #f7faff;
}

.hint-box p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.hint-box strong {
  color: var(--ink);
}

.user-card {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
  padding: 14px;
  border: 1px solid #dbe6ff;
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.06);
}

.user-card-head {
  display: flex;
  gap: 10px;
  align-items: center;
}

.user-avatar {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #ffffff;
  font-weight: 800;
  border-radius: 8px;
  background: linear-gradient(135deg, #0f4c81, #12b6c8);
  flex: 0 0 auto;
}

.user-card strong {
  display: block;
  line-height: 1.25;
}

.user-card span {
  color: var(--muted);
  font-size: 13px;
}

.password-panel {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.password-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--blue);
  cursor: pointer;
  font-size: 14px;
  list-style: none;
}

.password-panel summary::-webkit-details-marker {
  display: none;
}

.password-panel summary::after {
  content: "›";
  color: var(--muted);
  transition: transform 0.2s ease;
}

.password-panel[open] summary::after {
  transform: rotate(90deg);
}

.sidebar-form {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.sidebar-form input {
  min-height: 38px;
}

.user-card button,
.ghost {
  min-height: 34px;
  padding: 7px 10px;
  color: var(--blue);
  border: 1px solid #dbe6ff;
  border-radius: 8px;
  background: #ffffff;
  cursor: pointer;
}

.compact-button {
  width: auto;
  min-height: 34px;
  padding: 6px 10px;
  font-size: 14px;
  white-space: nowrap;
}

.ghost.danger {
  color: var(--danger);
  border-color: #fecaca;
}

.ghost:disabled {
  color: var(--muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.account-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.account-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
}

.account-item strong {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.account-item p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.account-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.warning-box {
  margin-bottom: 14px;
  padding: 12px;
  color: #991b1b;
  border: 1px solid #fecaca;
  border-radius: 8px;
  background: #fff7f7;
  font-size: 14px;
}

.launch-check {
  background: #ffffff;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.check-item {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
  color: var(--muted);
  font-size: 14px;
}

.check-item span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  padding: 0 6px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.check-item.ok span {
  color: var(--ok);
  background: #e8fff5;
}

.check-item.warn span {
  color: var(--warn);
  background: #fff7ed;
}

.status-box {
  margin-bottom: 14px;
  padding: 14px;
  border: 1px solid #dbe6ff;
  border-radius: 8px;
  background: #f7faff;
  color: var(--muted);
  line-height: 1.6;
}

.status-box strong {
  color: var(--ink);
}

.reminder-box {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin: 12px 0 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
}

.reminder-box p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.reminder-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.reminder-actions input {
  width: 120px;
}

.single-col {
  grid-template-columns: 1fr;
}

.filter-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.3fr) repeat(3, minmax(150px, 1fr)) auto auto;
  gap: 12px;
  align-items: center;
}

.mini-filter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}

.mini-filter-grid .filter-button {
  min-height: 44px;
}

.filter-button {
  min-width: 78px;
  padding: 0 18px;
}

.filter-results {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.filter-result-card {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
}

.filter-result-card strong {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

.filter-result-card p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

input[readonly] {
  color: var(--muted);
  background: #f4f6fb;
}

.import-box {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  padding: 12px;
  border: 1px dashed #d6ddeb;
  border-radius: 8px;
  background: #fbfcff;
}

.import-box p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.hidden-file {
  display: none;
}

.pager {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
}

.pager div {
  display: flex;
  gap: 8px;
}

@media (max-width: 640px) {
  .login-card {
    padding: 22px;
  }

  .visual-card,
  .visual-flow {
    display: none;
  }

  .login-screen {
    background:
      linear-gradient(135deg, rgba(15, 76, 129, 0.08), rgba(18, 182, 200, 0.1)),
      #f7f9fd;
  }

  .account-item {
    align-items: stretch;
    flex-direction: column;
  }

  .account-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .account-list {
    grid-template-columns: 1fr;
  }

  .panel-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .reminder-box,
  .reminder-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .reminder-actions input {
    width: 100%;
  }

  .pager,
  .pager div {
    align-items: stretch;
    flex-direction: column;
  }

  .filter-grid {
    grid-template-columns: 1fr;
  }

  .mini-filter-grid {
    grid-template-columns: 1fr;
  }

  .filter-results {
    grid-template-columns: 1fr;
  }

  .check-list {
    grid-template-columns: 1fr;
  }
}