:root {
  --ink: #1a2332;
  --ink-soft: #4a5568;
  --paper: #f7f5f0;
  --panel: rgba(255, 255, 255, 0.88);
  --line: #d4d0c8;
  --accent: #0d7377;
  --accent-hover: #095456;
  --accent-soft: #e6f3f3;
  --warn: #9a3412;
  --warn-bg: #fff7ed;
  --ok: #166534;
  --ok-bg: #f0fdf4;
  --shadow: 0 12px 40px rgba(26, 35, 50, 0.08);
  --radius: 14px;
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, #c8e6e5 0%, transparent 55%),
    radial-gradient(ellipse 70% 45% at 100% 0%, #f0e6d8 0%, transparent 50%),
    linear-gradient(165deg, #f7f5f0 0%, #ebe8e0 100%);
}

.app {
  width: min(920px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3.5rem;
}

.header {
  margin-bottom: 1.75rem;
}

.brand {
  margin: 0 0 0.35rem;
  font-family: var(--display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.header h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0.4rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.subtitle code {
  font-size: 0.88em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.search-panel {
  padding: 1.25rem 1.35rem 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.file-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.85rem;
  margin-bottom: 1rem;
}

.file-btn {
  display: inline-block;
  padding: 0.65rem 1.1rem;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s;
}

.file-btn:hover {
  background: var(--accent-hover);
}

#file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.file-name {
  font-size: 0.85rem;
  color: var(--ink-soft);
  word-break: break-all;
}

.search-label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.search-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

#search-input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 0.75rem 0.95rem;
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

#search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.18);
}

#search-input:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

#search-btn {
  flex: 0 0 auto;
  padding: 0.75rem 1.25rem;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

#search-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

#search-btn:active:not(:disabled) {
  transform: translateY(1px);
}

#search-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.status.is-loading {
  color: var(--ink-soft);
}

.status.is-ready {
  color: var(--ok);
}

.status.is-error {
  color: var(--warn);
}

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

.results {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.result-card {
  padding: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  animation: rise 0.35s ease both;
  overflow: hidden;
}

.result-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  width: 100%;
  padding: 1rem 1.2rem;
  font: inherit;
  text-align: left;
  color: inherit;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

.result-summary:hover {
  background: rgba(13, 115, 119, 0.06);
}

.result-card.is-open .result-summary {
  background: var(--accent-soft);
  border-bottom: 1px solid var(--line);
}

.result-main {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.65rem;
}

.result-hint {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
}

.result-table {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent-hover);
}

.result-sep {
  color: var(--ink-soft);
}

.result-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}

.result-detail {
  padding: 0 0 0.75rem;
}

.result-close {
  display: block;
  margin: 0.65rem 1.2rem 0.25rem auto;
  padding: 0.4rem 0.85rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-hover);
  background: var(--accent-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.result-close:hover {
  background: #d8ecec;
}

.sheet-block {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: rise 0.35s ease both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sheet-title {
  margin: 0;
  padding: 0.85rem 1.15rem;
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 600;
  background: var(--accent-soft);
  border-bottom: 1px solid var(--line);
  color: var(--accent-hover);
}

.sheet-meta {
  margin: 0;
  padding: 0.45rem 1.15rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  padding: 0.65rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  white-space: nowrap;
}

th {
  font-weight: 600;
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink-soft);
  position: sticky;
  top: 0;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(13, 115, 119, 0.04);
}

td.mark {
  background: rgba(13, 115, 119, 0.08);
  font-weight: 600;
}

tr.is-match td {
  background: rgba(13, 115, 119, 0.06);
}

.empty-state,
.error-state {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

.error-state {
  background: var(--warn-bg);
  color: var(--warn);
  border-color: #fed7aa;
}

@media (max-width: 560px) {
  .app {
    width: calc(100% - 1.25rem);
    padding-top: 1.5rem;
  }

  .search-panel {
    padding: 1rem;
  }

  #search-btn {
    width: 100%;
  }

  th,
  td {
    padding: 0.55rem 0.75rem;
    font-size: 0.85rem;
  }
}