/* Exchange Guide Design System v1.0 */
:root,
html[data-theme="dark"] {
  color-scheme: dark;
  --page: #080a0d;
  --surface: #0f1217;
  --surface-soft: #171b22;
  --surface-elevated: rgba(23, 27, 34, 0.88);
  --surface-selected: #102c3b;
  --ink: #f5f7fa;
  --ink-soft: #a7afbb;
  --ink-faint: #747e8b;
  --ink-disabled: #505965;
  --line: #242a33;
  --line-strong: #353d48;
  --glass: rgba(15, 18, 23, 0.78);
  --glass-strong: rgba(23, 27, 34, 0.9);
  --fill-primary: rgba(255, 255, 255, 0.1);
  --fill-secondary: rgba(255, 255, 255, 0.055);
  --brand: #64d2ff;
  --brand-dark: #79d9ff;
  --brand-soft: rgba(100, 210, 255, 0.13);
  --blue: #64d2ff;
  --blue-soft: rgba(100, 210, 255, 0.12);
  --amber: #ff9f0a;
  --amber-soft: rgba(255, 159, 10, 0.13);
  --green: #30d158;
  --green-soft: rgba(48, 209, 88, 0.12);
  --red: #ff453a;
  --red-soft: rgba(255, 69, 58, 0.13);
  --indigo: #7d7aff;
  --indigo-soft: rgba(125, 122, 255, 0.14);
  --yellow: #ffd60a;
  --focus-ring: rgba(100, 210, 255, 0.42);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 16px 36px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, 0.48);
  --radius: 8px;
  --radius-control: 10px;
  --radius-sheet: 20px;
  --sidebar-width: 240px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang TC", "Microsoft JhengHei", "Segoe UI", sans-serif;
}

html[data-theme="light"] {
  color-scheme: light;
  --page: #f5f5f7;
  --surface: #ffffff;
  --surface-soft: #eef0f3;
  --surface-elevated: rgba(255, 255, 255, 0.9);
  --surface-selected: #e6f4ff;
  --ink: #15171a;
  --ink-soft: #5c6470;
  --ink-faint: #7c8591;
  --ink-disabled: #a7afb8;
  --line: #e0e3e8;
  --line-strong: #c9ced6;
  --glass: rgba(245, 245, 247, 0.78);
  --glass-strong: rgba(255, 255, 255, 0.9);
  --fill-primary: rgba(29, 29, 31, 0.08);
  --fill-secondary: rgba(29, 29, 31, 0.04);
  --brand: #007aff;
  --brand-dark: #0066cc;
  --brand-soft: rgba(0, 122, 255, 0.1);
  --blue: #0066cc;
  --blue-soft: rgba(0, 122, 255, 0.09);
  --amber: #c65d00;
  --amber-soft: rgba(255, 149, 0, 0.12);
  --green: #248a3d;
  --green-soft: rgba(36, 138, 61, 0.1);
  --red: #d70015;
  --red-soft: rgba(215, 0, 21, 0.09);
  --indigo: #4f46a5;
  --indigo-soft: rgba(79, 70, 165, 0.1);
  --yellow: #a05a00;
  --focus-ring: rgba(0, 122, 255, 0.35);
  --shadow-sm: 0 1px 2px rgba(20, 24, 30, 0.08);
  --shadow-md: 0 14px 34px rgba(20, 24, 30, 0.11);
  --shadow-lg: 0 28px 80px rgba(20, 24, 30, 0.2);
}

html {
  background: var(--page);
}

body {
  background: linear-gradient(180deg, var(--page) 0%, color-mix(in srgb, var(--page) 94%, var(--surface-soft)) 46%, var(--page) 100%);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.62;
  letter-spacing: 0;
  transition: background-color 180ms ease, color 180ms ease;
}

button,
input,
select,
textarea {
  letter-spacing: 0;
}

button:disabled,
input:disabled,
select:disabled,
[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.42;
  box-shadow: none !important;
  transform: none !important;
}

:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

.app-shell {
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}

.sidebar {
  z-index: 30;
  padding: 20px 16px;
  border-right-color: var(--line);
  background: var(--glass);
  backdrop-filter: saturate(145%) blur(24px);
  -webkit-backdrop-filter: saturate(145%) blur(24px);
}

.brand {
  gap: 11px;
  min-height: 56px;
  padding: 0 6px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex-basis: 40px;
  border: 1px solid color-mix(in srgb, var(--brand) 45%, transparent);
  border-radius: 10px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--brand) 85%, #ffffff) 0%, color-mix(in srgb, var(--brand) 62%, #4f46a5) 100%);
  color: #061018;
  box-shadow: 0 8px 22px color-mix(in srgb, var(--brand) 20%, transparent);
  font-size: 11px;
  letter-spacing: 0;
}

.brand strong,
.mobile-brand strong {
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.brand small,
.mobile-brand small {
  color: var(--ink-faint);
}

.desktop-nav {
  gap: 4px;
  margin-top: 28px;
}

.nav-item {
  min-height: 48px;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 600;
}

.nav-item.active {
  border-color: color-mix(in srgb, var(--brand) 24%, transparent);
  background: var(--surface-selected);
  color: var(--brand-dark);
}

.nav-item.active svg {
  stroke-width: 2.2;
}

.campus-identity {
  position: relative;
  min-height: 112px;
  margin: 24px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  box-shadow: var(--shadow-sm);
}

.campus-identity::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 28%, rgba(0, 0, 0, 0.78) 100%);
  content: "";
}

.campus-identity img {
  display: block;
  width: 100%;
  height: 112px;
  object-fit: cover;
  object-position: 50% 72%;
}

.campus-identity figcaption {
  position: absolute;
  z-index: 1;
  right: 12px;
  bottom: 10px;
  left: 12px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 8px;
  color: white;
}

.campus-identity figcaption strong,
.campus-identity figcaption span {
  display: block;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.8);
}

.campus-identity figcaption strong {
  font-size: 13px;
}

.campus-identity figcaption span {
  font-size: 11px;
}

.source-health {
  margin-top: auto;
  padding: 16px 6px 0;
  border-top-color: var(--line);
}

.source-health > div:first-child strong {
  color: var(--brand);
  font-size: 24px;
}

.workspace {
  width: min(100%, 1440px);
  padding: 0 40px 72px;
}

.topbar {
  min-height: 72px;
  justify-content: space-between;
  border-bottom-color: var(--line);
  background: var(--glass);
  backdrop-filter: saturate(150%) blur(24px);
  -webkit-backdrop-filter: saturate(150%) blur(24px);
}

.topbar-context {
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-width: 0;
}

.topbar-context span {
  color: var(--ink-faint);
  font-size: 13px;
}

.topbar-context strong {
  overflow: hidden;
  color: var(--ink);
  font-size: 15px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.topbar-status {
  margin-right: 8px;
  color: var(--ink-faint);
}

.live-dot {
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 14%, transparent);
}

.page-section {
  padding: 48px 0;
  border-bottom-color: var(--line);
}

.overview-section {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: 24px;
  padding-top: 56px;
}

.overview-copy {
  grid-column: 1 / span 8;
  max-width: 780px;
}

.eyebrow,
.section-kicker {
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.overview-copy h1 {
  margin: 8px 0 10px;
  font-size: 40px;
  font-weight: 720;
  line-height: 1.16;
}

.overview-copy p {
  color: var(--ink-soft);
  font-size: 17px;
}

.search-form {
  grid-column: 1 / span 9;
  width: 100%;
  max-width: none;
  min-height: 60px;
  margin-top: 32px;
  border-color: var(--line-strong);
  border-radius: 14px;
  background: var(--surface-elevated);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.search-form:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--focus-ring), var(--shadow-md);
}

.search-form input::placeholder,
input::placeholder {
  color: var(--ink-faint);
}

.task-grid {
  grid-column: 1 / -1;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.task-link {
  min-height: 104px;
  padding: 18px;
  border-color: var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--surface) 0%, color-mix(in srgb, var(--surface) 92%, var(--brand-soft)) 100%);
  box-shadow: var(--shadow-sm);
}

.task-link:nth-child(2) > svg:first-child {
  color: var(--amber);
}

.task-link:nth-child(3) > svg:first-child {
  color: var(--green);
}

.task-link:nth-child(4) > svg:first-child {
  color: var(--indigo);
}

.task-link strong {
  font-size: 16px;
  font-weight: 650;
}

.summary-row {
  grid-column: 1 / span 9;
  width: 100%;
  max-width: none;
  gap: 24px;
  margin-top: 40px;
  padding-top: 24px;
  border-top-color: var(--line);
}

.summary-stat strong {
  color: var(--brand);
}

.section-heading h2 {
  color: var(--ink);
  font-size: 28px;
  font-weight: 700;
}

.section-heading p {
  color: var(--ink-soft);
}

.count-badge,
.experience-counts span,
.tag,
.document-type {
  border: 1px solid color-mix(in srgb, currentColor 18%, transparent);
  background: var(--fill-secondary);
}

.filter-panel {
  grid-template-columns: minmax(220px, 2fr) repeat(3, minmax(150px, 1fr)) auto;
  gap: 12px;
  padding: 18px;
  border-color: var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

input,
select,
textarea {
  min-height: 48px;
  border-color: var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--ink);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.primary-button,
.secondary-button,
.icon-button,
.chip-button {
  border-radius: var(--radius-control);
  font-weight: 650;
}

.primary-button {
  min-height: 48px;
  border-color: var(--brand);
  background: var(--brand);
  color: #061018;
  box-shadow: 0 8px 22px color-mix(in srgb, var(--brand) 15%, transparent);
}

html[data-theme="light"] .primary-button {
  color: #ffffff;
}

.secondary-button,
.icon-button,
.chip-button {
  border-color: var(--line-strong);
  background: var(--surface-elevated);
  color: var(--ink-soft);
}

.icon-button {
  min-width: 44px;
  min-height: 44px;
}

[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  position: absolute;
  z-index: 90;
  top: calc(100% + 8px);
  right: 0;
  width: max-content;
  max-width: 180px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-elevated);
  box-shadow: var(--shadow-md);
  color: var(--ink);
  content: attr(data-tooltip);
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-3px);
  transition: opacity 120ms ease, transform 120ms ease;
}

[data-tooltip]:hover::after,
[data-tooltip]:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.desktop-partner-table {
  border-color: var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.partner-table th {
  background: var(--surface-soft);
  color: var(--ink-faint);
}

.partner-table tr {
  transition: background-color 140ms ease;
}

.partner-table td,
.partner-table th {
  border-bottom-color: var(--line);
}

.school-detail-trigger {
  color: var(--ink);
  border-radius: 8px;
}

.two-column-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.two-column-layout > :first-child {
  grid-column: 1 / span 7;
}

.two-column-layout > :last-child {
  grid-column: 8 / span 5;
}

.deadline-card,
.scholarship-card,
.document-card,
.partner-card,
.search-result-card,
.experience-source-card {
  border-color: var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.deadline-card {
  border-left: 3px solid var(--amber);
}

.scholarship-card {
  border-left: 3px solid var(--indigo);
}

.scholarship-content,
.document-content,
.partner-card-content {
  border-top-color: var(--line);
}

.eligibility-result {
  border-color: var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.eligibility-result.is-pass {
  border-color: color-mix(in srgb, var(--green) 45%, var(--line));
  background: var(--green-soft);
}

.eligibility-result.is-warning {
  border-color: color-mix(in srgb, var(--amber) 45%, var(--line));
  background: var(--amber-soft);
}

.chip-button.active {
  border-color: var(--brand);
  background: var(--brand);
  color: #061018;
}

html[data-theme="light"] .chip-button.active {
  color: white;
}

.document-type {
  color: var(--indigo);
}

.text-highlight {
  border-radius: 3px;
  background: color-mix(in srgb, var(--yellow) 24%, transparent);
  color: color-mix(in srgb, var(--yellow) 80%, var(--ink));
  box-shadow: inset 0 -1px 0 color-mix(in srgb, var(--yellow) 55%, transparent);
}

.status-message {
  border-color: var(--line-strong);
  border-radius: 12px;
  background: var(--surface-elevated);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.status-message.error,
.experience-error {
  border-color: color-mix(in srgb, var(--red) 45%, var(--line));
  background: var(--red-soft);
  color: var(--ink);
}

.status-message.success {
  border-color: color-mix(in srgb, var(--green) 45%, var(--line));
  background: var(--green-soft);
  color: var(--ink);
}

.sources-disclosure {
  border-top-color: var(--line);
}

.source-row {
  border-bottom-color: var(--line);
}

.empty-state {
  color: var(--ink-soft);
}

.skeleton {
  background: var(--surface-soft);
}

.skeleton::after {
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--ink) 9%, transparent), transparent);
}

.university-dialog {
  border-color: var(--line-strong);
  border-radius: var(--radius-sheet);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

.university-dialog::backdrop {
  background: rgba(0, 0, 0, 0.68);
}

.university-dialog-header {
  border-bottom-color: var(--line);
  background: var(--glass-strong);
  backdrop-filter: saturate(150%) blur(24px);
  -webkit-backdrop-filter: saturate(150%) blur(24px);
}

.university-facts {
  background: var(--line);
}

.university-fact {
  background: var(--surface-soft);
}

.condition-details,
.workflow-section,
.experience-section,
.workflow-step,
.workflow-sources {
  border-color: var(--line);
}

.workflow-status,
.workflow-warning {
  border-left-color: var(--amber);
  background: var(--amber-soft);
  color: var(--ink);
}

.workflow-status.verified {
  border-left-color: var(--green);
  background: var(--green-soft);
}

.workflow-timeline::before {
  background: var(--line-strong);
}

.workflow-step-number {
  border-color: var(--surface);
  background: var(--brand);
  color: #061018;
  box-shadow: 0 0 0 1px var(--line-strong);
}

.workflow-step.needs-confirmation .workflow-step-number {
  background: var(--amber);
  color: #1d1200;
}

.workflow-sources a,
.partner-links a,
.evidence-link,
.official-link,
.source-row a {
  color: var(--blue);
}

.experience-disclaimer {
  border-left-color: var(--blue);
  background: var(--blue-soft);
  color: var(--ink);
}

.experience-highlight {
  border-left-color: var(--indigo);
}

.experience-highlight span {
  color: var(--indigo);
}

@media (hover: hover) {
  .nav-item:hover,
  .school-detail-trigger:hover {
    background: var(--fill-primary);
    color: var(--ink);
  }

  .task-link:hover,
  .deadline-card:hover,
  .scholarship-card:hover,
  .document-card:hover,
  .partner-card:hover,
  .search-result-card:hover,
  .experience-source-card:hover {
    border-color: var(--line-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .primary-button:hover {
    border-color: color-mix(in srgb, var(--brand) 78%, white);
    background: color-mix(in srgb, var(--brand) 88%, white);
    box-shadow: 0 10px 26px color-mix(in srgb, var(--brand) 19%, transparent);
    transform: translateY(-1px);
  }

  .secondary-button:hover,
  .icon-button:hover,
  .chip-button:hover {
    border-color: var(--line-strong);
    background: var(--fill-primary);
    color: var(--ink);
    transform: translateY(-1px);
  }

  .partner-table tbody tr:hover {
    background: var(--fill-secondary);
  }

  .workflow-step > summary:hover {
    color: var(--brand-dark);
  }

  .workflow-sources a:hover,
  .partner-links a:hover,
  .evidence-link:hover,
  .official-link:hover,
  .source-row a:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
  }
}

.primary-button:active,
.secondary-button:active,
.icon-button:active,
.chip-button:active,
.task-link:active,
.school-detail-trigger:active,
.mobile-nav a:active {
  transform: scale(0.98);
  transition-duration: 90ms;
}

@media (max-width: 1120px) {
  .workspace {
    padding-inline: 28px;
  }

  .overview-section {
    column-gap: 20px;
  }

  .overview-copy {
    grid-column: 1 / span 9;
  }

  .search-form,
  .summary-row {
    grid-column: 1 / span 10;
  }

  .task-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .filter-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .filter-panel .search-field {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  body {
    padding-bottom: calc(76px + env(safe-area-inset-bottom));
  }

  .app-shell {
    display: block;
  }

  .workspace {
    width: 100%;
    padding: 0 16px 40px;
  }

  .topbar {
    min-height: 64px;
    margin-inline: -16px;
    padding: 8px 16px;
  }

  .topbar-context,
  .topbar-status {
    display: none;
  }

  .mobile-brand {
    display: flex;
    align-items: center;
    gap: 9px;
  }

  .mobile-brand .brand-mark {
    width: 36px;
    height: 36px;
    flex-basis: 36px;
  }

  .topbar-actions {
    gap: 6px;
  }

  .page-section {
    padding: 40px 0;
  }

  .overview-section {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 16px;
    padding-top: 36px;
  }

  .overview-copy,
  .search-form,
  .task-grid,
  .summary-row {
    grid-column: 1 / -1;
  }

  .overview-copy h1 {
    font-size: 34px;
  }

  .overview-copy p {
    max-width: 32rem;
    font-size: 16px;
  }

  .search-form {
    grid-template-columns: 22px minmax(0, 1fr) 48px;
    margin-top: 24px;
  }

  .search-submit {
    width: 48px;
    padding: 0;
  }

  .search-submit span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .task-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-top: 24px;
  }

  .task-link {
    min-height: 76px;
    padding: 14px 16px;
  }

  .summary-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 28px;
  }

  .summary-stat {
    display: block;
  }

  .summary-stat strong,
  .summary-stat span,
  .summary-stat small {
    display: block;
  }

  .summary-stat strong {
    font-size: 26px;
  }

  .summary-stat span {
    margin-top: 5px;
  }

  .summary-stat small {
    display: none;
  }

  .section-heading h2 {
    font-size: 25px;
  }

  .filter-panel {
    grid-template-columns: 1fr 1fr;
    padding: 14px;
  }

  .two-column-layout {
    display: block;
  }

  .university-dialog {
    border-radius: 0;
  }

  .university-dialog-header {
    background: var(--glass-strong);
  }

  .mobile-nav {
    height: calc(64px + env(safe-area-inset-bottom));
    padding: 5px 8px env(safe-area-inset-bottom);
    border-top-color: var(--line);
    background: var(--glass-strong);
    backdrop-filter: saturate(160%) blur(24px);
    -webkit-backdrop-filter: saturate(160%) blur(24px);
  }

  .mobile-nav a {
    min-height: 52px;
    border-radius: 10px;
    color: var(--ink-faint);
  }

  .mobile-nav a.active {
    background: var(--surface-selected);
    color: var(--brand-dark);
  }
}

@media (max-width: 440px) {
  .filter-panel {
    grid-template-columns: 1fr;
  }

  .summary-row {
    gap: 8px;
  }

  .summary-stat strong {
    font-size: 23px;
  }
}

@media (max-height: 760px) and (min-width: 821px) {
  .campus-identity {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .sidebar,
  .topbar,
  .mobile-nav,
  .university-dialog-header,
  .status-message {
    background: var(--surface);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

@media (forced-colors: active) {
  .brand-mark,
  .primary-button,
  .workflow-step-number,
  .chip-button.active {
    border: 1px solid ButtonText;
    background: ButtonFace;
    color: ButtonText;
  }
}