:root {
  --ink: #10213f;
  --muted: #68758b;
  --line: #dce3ed;
  --paper: #f6f8fb;
  --card: #ffffff;
  --blue: #315be8;
  --violet: #6856e7;
  --orange: #ef8a3a;
  --red: #c54343;
  --green: #15856b;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    ui-rounded, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
.access-gate {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 15% 15%, #264e8b, transparent 38%), #081426;
}
.access-gate[hidden] {
  display: none;
}
.access-card {
  width: min(100%, 420px);
  padding: 36px;
  border: 1px solid #36527d;
  border-radius: 18px;
  background: #10213f;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  color: #f4f7fb;
}
.access-card h1 {
  margin: 8px 0 12px;
  font-size: 28px;
}
.access-card p {
  color: #c7d2e4;
  line-height: 1.65;
}
.access-card label {
  display: block;
  margin-top: 22px;
  font-size: 14px;
  font-weight: 700;
}
.access-card input {
  width: 100%;
  box-sizing: border-box;
  margin: 8px 0 14px;
  border: 1px solid #6882a9;
  border-radius: 9px;
  padding: 11px;
  font: inherit;
}
.shell {
  max-width: 1280px;
  margin: auto;
  padding: 0 28px 42px;
}
.topbar {
  height: 80px;
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}
.brand {
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 20px;
  margin-right: auto;
}
.brand span {
  color: var(--blue);
}
.status {
  color: var(--muted);
  font-size: 14px;
}
.button {
  border: 0;
  border-radius: 10px;
  padding: 11px 15px;
  font-weight: 700;
  cursor: pointer;
  font: inherit;
}
.button-primary {
  background: var(--ink);
  color: #fff;
}
.button-secondary {
  background: #edf2ff;
  color: #284eb8;
}
.button:disabled {
  opacity: 0.55;
  cursor: wait;
}
.hero {
  padding: 64px 0 38px;
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: end;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.06em;
  margin: 0;
  max-width: 720px;
}
.hero-copy {
  max-width: 660px;
  line-height: 1.7;
  color: var(--muted);
}
.gpa-card {
  background: linear-gradient(135deg, var(--ink), #263e75);
  color: white;
  min-width: 190px;
  border-radius: 18px;
  padding: 23px;
  display: grid;
  gap: 5px;
}
.gpa-card span,
.gpa-card small {
  color: #c5d3f5;
}
.gpa-card strong {
  font-size: 40px;
  letter-spacing: -0.05em;
}
.countdown {
  margin: 12px 0 18px;
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--blue);
}
.next-todo {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.next-todo h3 {
  margin: 0;
  font-size: 16px;
}
.next-todo .button {
  margin-top: 4px;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.button-row a {
  text-decoration: none;
  text-align: center;
}
.action-panel > .button-primary {
  margin-top: 16px;
}
.modal {
  width: min(1080px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  padding: 0;
  border: 0;
  border-radius: 18px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}
.modal::backdrop {
  background: rgba(4, 14, 32, 0.64);
}
.modal article {
  position: relative;
  padding: 30px;
}
.modal h2,
.modal h3 {
  margin-top: 0;
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 18px;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
}
.modal-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.modal-columns section {
  min-width: 0;
}
.modal textarea {
  min-height: 105px;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px;
  font: inherit;
  resize: vertical;
}
.mail-reading {
  white-space: pre-wrap;
  line-height: 1.65;
  min-height: 180px;
  max-height: 420px;
  overflow: auto;
  background: #f7f9fd;
  border-radius: 12px;
  padding: 14px;
}
.mail-item {
  width: 100%;
  text-align: left;
  border: 0;
  background: #fff;
  padding: 11px 0;
  border-bottom: 1px solid #edf0f5;
  cursor: pointer;
  font: inherit;
  color: var(--ink);
}
.mail-item small {
  display: block;
  color: var(--muted);
  margin-top: 3px;
}
.submit-modal {
  width: min(1160px, calc(100vw - 32px));
  overflow: hidden;
}
.submit-modal article {
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 32px);
  padding: 0;
  overflow: hidden;
}
.modal-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex: none;
  padding: 20px 26px 10px;
  background: #fff;
  border-bottom: 1px solid #edf0f5;
}
.modal-top h2 {
  margin: 0;
  font-size: 22px;
}
.modal-top .modal-close {
  position: static;
  flex: none;
}
.submission-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(205px, 1fr));
  gap: 12px;
  max-height: 42vh;
  overflow-y: auto;
  padding: 16px 26px 20px;
}
.submit-modal #submit-form {
  flex: none;
  overflow: visible;
  padding: 18px 26px 26px;
}
.submission-card {
  position: relative;
  min-height: 210px;
  overflow: hidden;
  border: 1px solid #e2e7ef;
  border-radius: 18px;
  padding: 17px;
  background: linear-gradient(145deg, #fff, #f8fafc);
  box-shadow: 0 8px 22px rgba(15, 37, 70, 0.08);
  display: flex;
  flex-direction: column;
  gap: 9px;
  text-align: left;
  font: inherit;
  color: var(--ink);
  cursor: pointer;
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease;
}
.submission-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 35px rgba(15, 37, 70, 0.16);
}
.submission-card h3 {
  font-size: 16px;
  line-height: 1.3;
  margin: 4px 0 0;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.submission-card .meta {
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.4;
}
.submission-card .deadline {
  color: #516072;
  font-size: 13px;
  font-weight: 650;
}
.submission-card .answer {
  margin-top: auto;
  border: 0;
  border-radius: 11px;
  padding: 10px;
  background: #5a82f6;
  color: #fff;
  font: inherit;
  font-weight: 800;
  text-align: center;
}
.submission-card .ribbon {
  position: absolute;
  top: 11px;
  right: -34px;
  width: 112px;
  padding: 4px 0;
  background: #d5d8de;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  text-align: center;
  transform: rotate(45deg);
}
.submission-card.overdue .ribbon {
  background: #ef9c48;
}
.submission-card.soon .ribbon {
  background: #5a82f6;
}
.submission-card.submitted .ribbon {
  background: #39bc68;
}
.selected-task {
  padding: 10px 12px;
  border-radius: 12px;
  background: #edf2ff;
  color: #284eb8;
  font-weight: 750;
}
.event-times {
  display: flex;
  align-items: center;
  gap: 8px;
}
.event-times input {
  min-width: 0;
  flex: 1;
}
.grid {
  display: grid;
  gap: 18px;
}
.primary-grid {
  grid-template-columns: 1.2fr 0.8fr;
}
.lower-grid {
  grid-template-columns: 1.35fr 0.65fr;
  margin-top: 18px;
}
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 8px 24px rgba(20, 43, 90, 0.04);
}
.action-panel {
  background: linear-gradient(135deg, #fff, #f1f5ff);
}
.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
}
.panel h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.03em;
}
.muted {
  color: var(--muted);
}
.reason {
  border-left: 3px solid var(--orange);
  padding-left: 10px;
  color: #795629;
  font-size: 14px;
}
.source-pill,
.count {
  border-radius: 100px;
  padding: 5px 9px;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}
.school {
  background: #e8efff;
  color: #315be8;
}
.personal {
  background: #e3f7f1;
  color: var(--green);
}
.count {
  background: #fff0eb;
  color: var(--red);
}
.compact-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}
.list-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  padding: 11px 0;
  border-bottom: 1px solid #edf0f5;
}
.list-item:last-child {
  border: 0;
}
.list-item strong {
  display: block;
  font-size: 14px;
}
.list-item small {
  color: var(--muted);
  display: block;
  margin-top: 3px;
}
.list-item span {
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  text-align: right;
}
.empty {
  color: var(--muted);
  padding: 18px 0;
}
.schedule {
  display: grid;
  grid-template-columns: repeat(5, minmax(125px, 1fr));
  gap: 10px;
  margin-top: 16px;
  overflow: auto;
}
.day {
  background: #f7f9fd;
  border-radius: 12px;
  padding: 12px;
  min-height: 130px;
}
.day h3 {
  font-size: 13px;
  margin: 0 0 10px;
}
.lesson {
  border-left: 3px solid var(--violet);
  padding: 7px 8px;
  background: #fff;
  margin: 6px 0;
  border-radius: 5px;
  font-size: 12px;
}
.lesson small {
  display: block;
  color: var(--muted);
  margin-top: 3px;
}
.task-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 9px;
  margin: 16px 0 0;
}
.task-form input,
.task-form select {
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}
.courses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.course {
  padding: 14px;
  background: #f7f9fd;
  border-radius: 12px;
}
.course strong {
  display: block;
  font-size: 14px;
}
.course small {
  display: block;
  color: var(--muted);
  margin-top: 6px;
}
.connect-panel {
  margin-top: 18px;
  display: flex;
  gap: 24px;
  align-items: end;
  justify-content: space-between;
}
.connect-panel h2 {
  margin: 0;
}
.connect-form {
  display: grid;
  grid-template-columns: 180px 180px auto;
  gap: 8px;
}
.connect-form input {
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px;
  font: inherit;
}
.error {
  color: var(--red);
  font-size: 14px;
  margin: 0;
}
.course-plan {
  display: grid;
  gap: 12px;
}
.course-row {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 8px;
  margin: 7px 0;
}
.course-row input,
.course-row select {
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px;
  font: inherit;
}
.plan-result {
  color: var(--muted);
  line-height: 1.65;
  margin-top: 14px;
}
.plan-result.valid {
  color: var(--green);
}
.plan-result.invalid {
  color: var(--red);
}
.link-list a {
  color: var(--blue);
  font-weight: 700;
  text-decoration: none;
}
footer {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  padding: 34px 0 0;
}
@media (max-width: 780px) {
  .shell {
    padding: 0 16px 32px;
  }
  .topbar {
    height: auto;
    padding: 16px 0;
    flex-wrap: wrap;
  }
  .brand {
    width: 100%;
  }
  .hero {
    padding: 42px 0 28px;
    display: grid;
  }
  .primary-grid,
  .lower-grid {
    grid-template-columns: 1fr;
  }
  .connect-panel {
    display: grid;
  }
  .connect-form {
    grid-template-columns: 1fr;
  }
  .course-row {
    grid-template-columns: 1fr 100px;
  }
  .schedule {
    grid-template-columns: repeat(5, 150px);
  }
  .gpa-card {
    width: 100%;
  }
}
.quick-nav {
  display: flex;
  gap: 14px;
}
.quick-nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}
.quick-nav a:hover {
  color: var(--accent);
}
.check-label {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
}
.submission-detail {
  border-radius: 12px;
  background: #f7f9fd;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}
.submission-detail p {
  margin: 0 0 7px;
}
.submission-detail p:last-child {
  margin-bottom: 0;
}
@media (max-width: 780px) {
  .quick-nav {
    order: 3;
    width: 100%;
    overflow: auto;
  }
  .quick-nav a {
    white-space: nowrap;
  }
}
.today-line {
  margin: 18px 0;
}
.today-line .compact-list {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 1px;
}
.today-line .list-item {
  min-width: 220px;
}
.compact-form {
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 16px;
}
.compact-form input {
  min-width: 0;
}
.compact-form .event-times input[type="number"] {
  max-width: 110px;
}
.mail-reading {
  white-space: pre-wrap;
  line-height: 1.55;
  max-height: 40vh;
  overflow: auto;
}
.mail-modal .task-form {
  margin-top: 14px;
}
.mail-modal select {
  width: 100%;
}
@media (max-width: 780px) {
  .today-line {
    padding: 16px;
  }
  .today-line .panel-heading {
    gap: 10px;
    align-items: flex-start;
  }
  .today-line .list-item {
    min-width: 190px;
  }
  .submit-modal {
    width: calc(100vw - 16px);
  }
  .modal article {
    padding: 20px;
  }
  .mail-modal .modal-columns {
    gap: 16px;
  }
  .button-row .button {
    width: 100%;
    text-align: center;
  }
  .gpa-card {
    min-width: 0;
  }
  .hero h1 {
    font-size: 36px;
  }
}