:root {
  --ink: #1f2328;
  --ink-soft: #6e7781;
  --paper: #ffffff;
  --bg: #f6f7f9;
  --line: #e3e6ea;
  --accent: #2d6cdf;
  --accent-dark: #1f52b3;
  --accent-soft: #eaf1fd;
  --mono-bg: #24292f;
  --mono-fg: #e6edf3;
  --danger: #cf222e;
  --font-display: Arial, "Helvetica Neue", Helvetica, sans-serif;
  --font-mono: Consolas, "Courier New", monospace;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(31, 35, 40, 0.08), 0 8px 24px rgba(31, 35, 40, 0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(14px, 1.5vw, 15px);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.topnav {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  flex: 0 0 auto;
}

.topnav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px clamp(14px, 3vw, 24px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: baseline;
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 20px);
}

.logo-mark {
  color: var(--ink);
}

.topnav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.5vw, 24px);
  flex-wrap: wrap;
}

.topnav-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 14px;
}

.topnav-links a:hover {
  color: var(--accent);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
}

.lang-sep {
  color: var(--line);
  font-size: 12px;
  user-select: none;
}

.lang-btn {
  position: relative;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 2px 1px 5px;
  cursor: pointer;
}

.lang-btn::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 150ms ease;
}

.lang-btn:hover {
  color: var(--ink);
}

.lang-btn.is-active {
  color: var(--ink);
}

.lang-btn.is-active::after {
  transform: scaleX(1);
}

.github-icon {
  flex: 0 0 auto;
}

.hero {
  text-align: center;
  padding: clamp(28px, 6vw, 48px) 16px clamp(18px, 4vw, 28px);
  flex: 0 0 auto;
}

.hero h1 {
  margin: 0;
  font-size: clamp(18px, 3vw, 26px);
  font-weight: 700;
  color: var(--ink);
}

.hero-sub {
  margin: 10px auto 0;
  max-width: 56ch;
  color: var(--ink-soft);
  font-size: clamp(14px, 1.8vw, 16px);
}

.page {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  flex: 1 0 auto;
  padding: 0 clamp(14px, 3vw, 24px) clamp(40px, 6vw, 64px);
}

.upload-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 32px);
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 6px;
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  padding: clamp(28px, 6vw, 44px) 16px;
  cursor: pointer;
  transition: border-color 120ms ease, background-color 120ms ease;
}

.dropzone:hover,
.dropzone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone-icon {
  font-size: 28px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}

.dropzone-title {
  font-size: clamp(15px, 2vw, 17px);
  font-weight: 700;
  color: var(--ink);
}

.password-row {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.field-label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.password-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.password-controls input {
  flex: 1 1 220px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  font-family: var(--font-display);
  font-size: 14px;
}

.password-controls input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.btn {
  border: none;
  border-radius: 6px;
  padding: 10px 20px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-dark);
}

.btn-outline {
  background: var(--paper);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-outline:hover:not(:disabled) {
  background: var(--accent-soft);
}

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

.status {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
  min-height: 16px;
}

.status.is-error {
  color: var(--danger);
  font-weight: 700;
}

.trust-line {
  text-align: center;
  color: var(--ink-soft);
  font-size: 12.5px;
  margin: 14px 0 0;
}

.trust-line a {
  color: var(--accent);
  text-decoration: underline;
}

.trust-line a:hover {
  color: var(--accent-dark);
}

.results {
  margin-top: clamp(20px, 4vw, 32px);
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(16px, 3vw, 20px);
  min-width: 0;
}

.panel-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  margin: 0;
}

.data-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.data-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.table-select {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
}

.table-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.table-scroll {
  overflow: auto;
  max-height: 65vh;
  border: 1px solid var(--line);
  border-radius: 6px;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 12.5px;
}

thead th {
  position: sticky;
  top: 0;
  background: var(--mono-bg);
  color: var(--mono-fg);
  text-align: left;
  padding: 8px 10px;
  white-space: nowrap;
  font-weight: 700;
}

tbody td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

tbody td.is-null {
  color: var(--ink-soft);
  font-style: italic;
}

tbody tr:nth-child(even) {
  background: #fafbfc;
}

tbody tr:hover {
  background: var(--accent-soft);
}

.footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
  padding: 18px 0;
  flex: 0 0 auto;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(14px, 3vw, 24px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 12.5px;
}

.footer-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-soft);
}

.footer-github:hover {
  color: var(--accent);
}