/* ===== TOKENS ===== */
:root {
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-bg: #FFFFFF;
  --color-surface: #F5F5F5;
  --color-surface-blue: #F5F5FC;
  --color-border: #E5E7EB;
  --color-text: #1A1A1A;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-text-placeholder: #AAAAAA;
  --color-tag-bg: #F0F0F0;
  --color-tag-active-bg: #EEF2FF;
  --color-tag-active-text: #2563EB;
  --color-skeleton: #E5E7EB;
  --color-card-img: #D9D9D9;

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px; --space-10: 40px;
  --space-12: 48px; --space-16: 64px;

  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 12px; --radius-full: 9999px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --shadow: 0 -2px 8px rgba(0,0,0,0.1);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); color: var(--color-text); background: var(--color-bg); line-height: 1.5; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; font-family: inherit; font-size: inherit; }
input, select { font-family: inherit; font-size: inherit; }

/* ===== HEADER ===== */
.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-4); position: sticky; top: 0; z-index: 100;
  background: var(--color-bg); border-bottom: 1px solid var(--color-border);
}
.header__logo { font-size: 18px; font-weight: 700; }
.header__nav { display: none; gap: var(--space-8); }
.header__nav.open {
  display: flex; flex-direction: column; position: absolute;
  top: 100%; left: 0; right: 0; background: var(--color-bg);
  padding: var(--space-4); border-bottom: 1px solid var(--color-border);
}
.header__link { font-size: 14px; font-weight: 500; color: var(--color-text-secondary); }
.header__link.active { color: var(--color-primary); }
.header__menu { background: none; font-size: 20px; color: var(--color-text); }

/* ===== PAGE ===== */
.page { display: none; padding-bottom: 80px; }
.page.active { display: block; }

/* ===== HERO ===== */
.hero {
  background: var(--color-surface-blue); padding: var(--space-8) var(--space-4);
}
.hero--compact { padding: var(--space-8) var(--space-4); text-align: center; }
.hero--compact .hero__sub { color: var(--color-text-secondary); font-size: 14px; margin-bottom: 0; }
.hero__title { font-size: 24px; font-weight: 700; line-height: 1.3; margin-bottom: var(--space-3); }
.hero__sub { font-size: 14px; color: var(--color-text-secondary); margin-bottom: var(--space-6); }

/* ===== HOME PANELS ===== */
.home-panels { display: flex; flex-direction: column; gap: var(--space-6); }
.home-panel {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-3);
}
.home-panel__cta { margin-top: auto; }
.home-panel__title { font-size: 18px; font-weight: 600; }

/* ===== AI QUICK PICKS ===== */
.ai-quick-picks { display: flex; flex-direction: column; gap: var(--space-2); }
.ai-quick-pick {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-md);
  background: var(--color-surface-blue); color: var(--color-text);
  font-size: 14px; font-weight: 500; text-align: left;
  transition: background 0.2s;
}
.ai-quick-pick:hover { background: var(--color-tag-active-bg); color: var(--color-primary); }
.ai-divider {
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--color-text-muted); font-size: 12px; margin: var(--space-1) 0;
}
.ai-divider::before, .ai-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--color-border);
}

/* ===== SECTION ===== */
.section { padding: var(--space-6) var(--space-4); }
.section__title { font-size: 18px; font-weight: 600; margin-bottom: var(--space-4); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 24px; border-radius: var(--radius-md); font-weight: 600; font-size: 16px;
  transition: background 0.2s;
}
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--secondary { background: var(--color-bg); color: var(--color-text-secondary); border: 1px solid var(--color-border); }
.btn--full { width: 100%; }
.btn--sm { padding: 10px 20px; font-size: 14px; }

/* ===== INPUT / SELECT ===== */
.input {
  width: 100%; padding: 14px 12px; border: 1px solid var(--color-border);
  border-radius: var(--radius-md); font-size: 14px; outline: none;
}
.input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.input::placeholder { color: var(--color-text-placeholder); }
.input-with-icon { position: relative; }
.input-icon {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  font-size: 16px; pointer-events: none; line-height: 1;
}
.input--icon { padding-left: 40px; }
.select {
  padding: 8px 12px; border: 1px solid var(--color-border);
  border-radius: var(--radius-md); font-size: 13px; background: var(--color-bg);
}

/* ===== TABS ===== */
.tabs { display: flex; gap: 0; margin-bottom: var(--space-4); }
.tab {
  padding: var(--space-2) var(--space-4); font-size: 14px; background: none;
  color: var(--color-text-muted); border-bottom: 2px solid transparent;
}
.tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); font-weight: 600; }

/* ===== FILTER TAGS ===== */
.filter-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-4); }
.tag {
  display: inline-flex; align-items: center; padding: 8px 12px;
  border-radius: var(--radius-full); font-size: 13px; font-weight: 500;
  background: var(--color-tag-bg); color: var(--color-text-secondary); cursor: pointer;
  transition: all 0.2s;
}
.tag.active, .tag--active {
  background: var(--color-tag-active-bg); color: var(--color-tag-active-text);
}
.tag__remove { margin-left: 6px; font-size: 11px; opacity: 0.7; }

/* ===== CARD LIST / GRID ===== */
.card-list { display: flex; flex-direction: column; gap: var(--space-2); }
.card-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }

/* ===== CARD ===== */
.card {
  background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: var(--space-3); cursor: pointer; transition: box-shadow 0.2s;
}
.card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.card--list { display: flex; align-items: center; gap: var(--space-3); }
.card--grid { display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-4); }
.card__img {
  width: 64px; height: 40px; background: var(--color-card-img);
  border-radius: var(--radius-sm); flex-shrink: 0;
}
.card--grid .card__img { width: 100%; height: 140px; border-radius: var(--radius-md); }
.card__info { flex: 1; min-width: 0; }
.card__name { font-size: 14px; font-weight: 600; }
.card__meta { font-size: 12px; color: var(--color-text-muted); margin-top: 2px; }
.card__tags { display: flex; gap: var(--space-1); margin-top: var(--space-1); flex-wrap: wrap; }
.card__tag { font-size: 11px; padding: 2px 8px; border-radius: var(--radius-full); background: var(--color-tag-active-bg); color: var(--color-tag-active-text); }

/* ===== CARD CHECKBOX ===== */
.card__check {
  width: 20px; height: 20px; border: 2px solid var(--color-border); border-radius: var(--radius-sm);
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all 0.2s; font-size: 12px; color: #fff;
}
.card__check.checked { background: var(--color-primary); border-color: var(--color-primary); }

/* ===== AI RECOMMEND ===== */
.ai-summary {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--color-surface-blue); padding: var(--space-12) var(--space-4);
  gap: var(--space-4); flex-wrap: wrap;
}
.ai-summary__left h2 { font-size: 20px; font-weight: 700; margin-bottom: var(--space-2); }
.ai-summary__right { font-size: 16px; font-weight: 600; color: var(--color-primary); }
.ai-links { display: flex; gap: var(--space-6); justify-content: center; padding: var(--space-4) 0; }
.ai-retry-section {
  background: var(--color-surface); border-radius: var(--radius-lg);
  margin: 0 var(--space-4); padding: var(--space-6);
}
.ai-retry__title { font-size: 16px; font-weight: 600; margin-bottom: var(--space-3); }
.ai-quick-picks--row { flex-direction: row; flex-wrap: wrap; }
.ai-retry__input { display: flex; gap: var(--space-2); margin-top: var(--space-4); }
.ai-retry__input .input-with-icon { flex: 1; }
.ai-retry__input .btn { white-space: nowrap; }
@media (min-width: 1024px) {
  .ai-retry-section { margin: 0 120px; }
}
.ai-loading {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: var(--space-16) 0; gap: var(--space-4);
}
.ai-loading__spinner {
  width: 40px; height: 40px; border: 3px solid var(--color-border);
  border-top-color: var(--color-primary); border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== AI CARD with rank ===== */
.card--ai { position: relative; }
.card__rank {
  display: inline-flex; padding: 4px 8px; border-radius: var(--radius-sm);
  background: var(--color-primary); color: #fff; font-size: 11px; font-weight: 600;
  margin-bottom: var(--space-2);
}
.card__reason {
  background: var(--color-surface-blue); border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3); font-size: 12px; color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

/* ===== COMPARE TABLE ===== */
.compare-table { display: grid; gap: 0; overflow-x: auto; }
.compare-table--2 { grid-template-columns: 140px 1fr 1fr; }
.compare-table--3 { grid-template-columns: 140px 1fr 1fr 1fr; }
.compare-col-header {
  background: var(--color-surface); padding: var(--space-4);
  display: flex; flex-direction: column; gap: var(--space-2); position: relative;
}
.compare-col-header__remove {
  position: absolute; top: 8px; right: 8px; background: none;
  color: var(--color-text-muted); font-size: 16px; cursor: pointer;
}
.compare-col-header .card__img { width: 100%; height: 80px; }
.compare-label {
  background: var(--color-surface); padding: var(--space-4);
  font-size: 13px; font-weight: 600; color: var(--color-text-muted);
  display: flex; align-items: center;
}
.compare-cell {
  padding: var(--space-4); font-size: 14px; display: flex; align-items: center;
  border-bottom: 1px solid var(--color-border);
}
.compare-cell:nth-child(even) { background: var(--color-surface); }
.compare-cta { padding: var(--space-4); }

/* ===== DETAIL ===== */
.detail__hero { display: flex; flex-direction: column; align-items: center; padding: var(--space-4); gap: var(--space-3); }
.detail__img { width: 240px; height: 150px; background: var(--color-card-img); border-radius: var(--radius-lg); }
.detail__name { font-size: 20px; font-weight: 700; }
.detail__issuer { font-size: 14px; color: var(--color-text-muted); }
.detail__stats { display: flex; gap: var(--space-2); padding: 0 var(--space-4); }
.stat-box {
  flex: 1; background: var(--color-surface); border-radius: var(--radius-md);
  padding: var(--space-3); text-align: center;
}
.stat-box__label { font-size: 12px; color: var(--color-text-muted); }
.stat-box__value { font-size: 16px; font-weight: 700; margin-top: 2px; }
.detail__benefits { padding: var(--space-4); }
.detail__benefits h3 { font-size: 16px; font-weight: 600; margin-bottom: var(--space-2); }

/* ===== ACCORDION ===== */
.accordion { border-bottom: 1px solid var(--color-border); }
.accordion__header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0; cursor: pointer; font-size: 14px; font-weight: 600;
}
.accordion__icon { font-size: 12px; color: var(--color-text-muted); transition: transform 0.2s; }
.accordion.open .accordion__icon { transform: rotate(180deg); }
.accordion__body { display: none; padding-bottom: 14px; font-size: 13px; color: var(--color-text-secondary); white-space: pre-line; }
.accordion.open .accordion__body { display: block; }

/* ===== STICKY CTA BAR ===== */
.detail__cta-bar {
  display: flex; gap: var(--space-2); padding: var(--space-3) var(--space-4);
  background: var(--color-bg); z-index: 50;
}
.detail__cta-bar .btn { flex: 1; }
#detail-cta-mobile {
  position: fixed; bottom: 0; left: 0; right: 0; box-shadow: var(--shadow);
}
#detail-cta-desktop { display: none; }

/* ===== COMPARE BAR ===== */
.compare-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  display: none; align-items: center; justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg); box-shadow: var(--shadow); z-index: 50;
}
.compare-bar.visible { display: flex; }
.compare-bar__count { font-size: 14px; color: var(--color-text-secondary); }

/* ===== EMPTY STATE ===== */
.empty-state { text-align: center; padding: var(--space-16) var(--space-4); }
.empty-state__text { font-size: 16px; font-weight: 600; margin-bottom: var(--space-2); }
.empty-state__sub { font-size: 14px; color: var(--color-text-muted); margin-bottom: var(--space-6); }

/* ===== SKELETON ===== */
.skeleton-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
.skeleton-card {
  height: 200px; background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%; border-radius: var(--radius-lg);
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ===== STATE VISIBILITY ===== */
[data-state] > div { display: none; }
[data-state="default"] > .state-default { display: block; }
[data-state="empty"] > .state-empty { display: block; }
[data-state="loading"] > .state-loading { display: block; }
[data-state="error"] > .state-error { display: block; }
[data-state="input"] > .state-input { display: block; }

/* ===== SEARCH HEADER ===== */
.search-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }
.search-header__count { font-size: 16px; font-weight: 600; }
.search-header__actions { display: flex; align-items: center; gap: var(--space-4); }

/* ===== FILTER LABEL ===== */
.filter-label { font-size: 13px; font-weight: 600; color: var(--color-text-secondary); margin-bottom: var(--space-2); }

/* ===== FILTER ROW ===== */
.filter-row { display: flex; gap: var(--space-4); margin-bottom: var(--space-4); flex-wrap: wrap; align-items: center; }
.fee-range { display: flex; align-items: center; gap: var(--space-2); flex: 1; min-width: 200px; }
.fee-range__label { font-size: 13px; font-weight: 500; color: var(--color-text-secondary); white-space: nowrap; }
.fee-range__value { font-size: 13px; color: var(--color-primary); font-weight: 600; white-space: nowrap; min-width: 80px; }
.range-input { flex: 1; accent-color: var(--color-primary); }

/* ===== FOOTER ===== */
.footer {
  padding: var(--space-12) var(--space-4); background: var(--color-surface);
  border-top: 1px solid var(--color-border); text-align: center;
  font-size: 13px; color: var(--color-text-muted); margin-top: var(--space-8);
}
.footer__links { display: flex; justify-content: center; gap: var(--space-6); margin-bottom: var(--space-3); }
.footer__links a { color: var(--color-text-secondary); font-weight: 500; }
@media (min-width: 1024px) {
  .footer { padding: var(--space-12) 120px; }
}

/* ===== LINKS ===== */
.link { color: var(--color-primary); font-weight: 500; font-size: 14px; }
.link--secondary { color: var(--color-text-secondary); }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: 13px; }

/* ===== NOTICE ===== */
.notice { padding: var(--space-4); }
.notice h4 { font-size: 14px; font-weight: 600; color: var(--color-text-muted); margin-bottom: var(--space-1); }
.notice p { font-size: 12px; color: var(--color-text-placeholder); white-space: pre-line; }

/* ============================================
   RESPONSIVE — TABLET (768px+)
   ============================================ */
@media (min-width: 768px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .skeleton-grid { grid-template-columns: repeat(2, 1fr); }
  .header__nav { display: flex; }
  .header__menu { display: none; }
}

/* ============================================
   RESPONSIVE — DESKTOP (1024px+)
   ============================================ */
@media (min-width: 1024px) {
  .header { padding: var(--space-4) 120px; }
  .section { padding: var(--space-8) 120px; }
  .hero { padding: var(--space-16) 120px; }
  .hero--compact { padding: var(--space-12) 120px; }
  .hero__title { font-size: 36px; }
  .home-panels { flex-direction: row; align-items: stretch; }
  .home-panel { flex: 1; }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .card-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .skeleton-grid { grid-template-columns: repeat(3, 1fr); }
  .card--grid .card__img { height: 180px; }
  .card__name { font-size: 16px; }
  .ai-summary { padding: var(--space-12) 120px; }
  .ai-summary__left h2 { font-size: 24px; }
  .ai-summary__right { font-size: 18px; }
  .search-header__count { font-size: 18px; }
  .detail { display: flex; gap: var(--space-12); padding: var(--space-8) 120px; }
  .detail__hero { flex: 0 0 400px; }
  .detail__img { width: 360px; height: 225px; }
  .detail__name { font-size: 24px; }
  .detail__body { flex: 1; }
  .detail__stats { padding: 0; }
  #detail-cta-desktop { display: flex; position: static; box-shadow: none; padding: var(--space-4) 0; }
  #detail-cta-mobile { display: none; }
  .compare-bar { padding: var(--space-3) 120px; }
  .compare-table { min-width: 100%; }
}