:root {
  color-scheme: dark;
  --brand-color: #60a5fa;
  --brand-strong: #3b82f6;
  --brand-accent: #6366f1;
  --bg-canvas: #0b101b;
  --bg-surface: #111827;
  --bg-elevated: #182235;
  --bg-subtle: #0f172a;
  --border-color: rgba(148, 163, 184, 0.16);
  --border-strong: rgba(96, 165, 250, 0.42);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --status-warn-bg: rgba(245, 158, 11, 0.12);
  --status-warn-border: rgba(245, 158, 11, 0.35);
  --status-warn-text: #fcd34d;
  --status-err-bg: rgba(239, 68, 68, 0.12);
  --status-err-border: rgba(239, 68, 68, 0.35);
  --status-err-text: #fca5a5;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 20px 45px -18px rgba(2, 6, 23, 0.72);
  accent-color: var(--brand-color);
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at 14% 8%, rgba(59, 130, 246, 0.13), transparent 36%),
    radial-gradient(circle at 86% 14%, rgba(99, 102, 241, 0.11), transparent 34%),
    var(--bg-canvas);
}

a {
  color: var(--brand-color);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: #93c5fd;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88em;
  padding: 0.14em 0.42em;
  border-radius: 5px;
  background: rgba(148, 163, 184, 0.12);
  color: #cbd5e1;
}

.container {
  width: min(1140px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.sr-only,
.sr-file-input {
  position: absolute;
  clip-path: inset(50%);
  overflow: hidden;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  white-space: nowrap;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(11, 16, 27, 0.84);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 70px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}

.brand:hover {
  color: #ffffff;
}

.brand-mark {
  flex-shrink: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--text-secondary);
  font-size: 0.94rem;
  font-weight: 500;
}

.nav-list a:hover {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.94rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease, transform 0.1s ease;
}

.btn:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand-color);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-strong), var(--brand-accent));
  color: #ffffff;
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-primary:disabled {
  opacity: 0.65;
  cursor: progress;
}

.btn-secondary {
  background: rgba(148, 163, 184, 0.1);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(148, 163, 184, 0.18);
}

.btn-outline {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(96, 165, 250, 0.35);
  color: #bfdbfe;
}

.btn-outline:hover {
  background: rgba(59, 130, 246, 0.18);
  color: #ffffff;
}

.btn-block {
  width: 100%;
  padding-block: 0.78rem;
}

/* Main Grid */
.main-grid {
  flex: 1;
  padding-block: 3rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.hero-upload {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: start;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.85rem;
  padding: 0.28rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(96, 165, 250, 0.28);
  color: #93c5fd;
}

.hero-copy h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 3.2vw, 2.65rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.lead {
  margin: 0 0 1.8rem;
  color: var(--text-secondary);
  font-size: 1.04rem;
  max-width: 56ch;
}

.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 0;
}

.metric-card {
  padding: 0.95rem 1rem;
  background: rgba(17, 24, 39, 0.75);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.metric-card dt {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.metric-card dd {
  margin: 0;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}

/* Upload Card */
.upload-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.65rem;
  box-shadow: var(--shadow-card);
}

.upload-card h2 {
  margin: 0 0 1.1rem;
  font-size: 1.2rem;
}

.dropzone {
  border: 1.5px dashed rgba(148, 163, 184, 0.3);
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  padding: 1.6rem 1.2rem;
  text-align: center;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.dropzone.is-dragover {
  border-color: var(--brand-color);
  background: rgba(59, 130, 246, 0.09);
}

.dropzone-icon {
  color: var(--brand-color);
  margin-bottom: 0.45rem;
}

.dropzone-title {
  margin: 0 0 0.3rem;
  font-weight: 600;
  font-size: 0.98rem;
}

.dropzone-hint {
  margin: 0 0 1rem;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.file-queue {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.file-queue:empty {
  margin: 0;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.6rem 0.8rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
}

.file-meta {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.file-name {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-hash {
  font-size: 0.76rem;
  color: var(--text-secondary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.file-remove {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem 0.45rem;
  border-radius: 6px;
  font-size: 0.88rem;
}

.file-remove:hover {
  color: #fca5a5;
  background: rgba(239, 68, 68, 0.12);
}

.options-fieldset {
  margin: 1.1rem 0;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.55);
}

.options-fieldset legend {
  padding-inline: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.radio-row label,
.checkbox-row label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-primary);
  cursor: pointer;
}

.checkbox-row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Progress Bar */
.progress-wrap {
  margin-bottom: 1rem;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

progress {
  width: 100%;
  height: 9px;
  border-radius: 999px;
  accent-color: var(--brand-color);
}

/* Fallback for older browsers without accent-color */
@supports not (accent-color: var(--brand-color)) {
  form input[type="checkbox"].visually-hidden {
    position: absolute !important;
    clip-path: inset(50%) !important;
    overflow: hidden !important;
    width: 1px !important;
    height: 1px !important;
    margin: -1px !important;
    padding: 0 !important;
    border: 0 !important;
    white-space: nowrap !important;
  }

  .checkbox-row label {
    position: relative;
    padding-left: 1.85rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
  }

  .checkbox-row input[type="checkbox"] + span::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1.15rem;
    height: 1.15rem;
    border: 2px solid #64748b;
    background: #0f172a;
    border-radius: 4px;
    box-sizing: border-box;
    transition: all 0.2s ease;
  }

  .checkbox-row input[type="checkbox"]:focus-visible + span::before {
    outline: 2px solid var(--brand-color);
    outline-offset: 2px;
  }

  .checkbox-row input[type="checkbox"]:checked + span::before {
    background-color: var(--brand-color, #60a5fa);
    border-color: var(--brand-color, #60a5fa);
  }

  .checkbox-row input[type="checkbox"]:checked + span::after {
    content: "✓";
    position: absolute;
    left: 0.24rem;
    top: 50%;
    transform: translateY(-50%);
    color: #0b101b;
    font-weight: bold;
    font-size: 0.85rem;
  }

  progress {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border: none;
    background: #1e293b;
    height: 8px;
    border-radius: 4px;
  }

  progress::-webkit-progress-bar {
    background-color: #1e293b;
    border-radius: 4px;
  }

  progress::-webkit-progress-value {
    background-color: var(--brand-color, #60a5fa);
    border-radius: 4px;
  }

  progress::-moz-progress-bar {
    background-color: var(--brand-color, #60a5fa);
    border-radius: 4px;
  }
}

.status-banner {
  margin-top: 0.9rem;
  padding: 0.75rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: 0.87rem;
  line-height: 1.45;
  background: var(--status-warn-bg);
  border: 1px solid var(--status-warn-border);
  color: var(--status-warn-text);
}

.status-banner.is-error {
  background: var(--status-err-bg);
  border-color: var(--status-err-border);
  color: var(--status-err-text);
}

/* Lookup Section */
.lookup-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.8rem;
  display: grid;
  grid-template-columns: 1fr minmax(280px, 430px);
  gap: 1.5rem;
  align-items: center;
}

.lookup-info h2 {
  margin: 0 0 0.35rem;
  font-size: 1.22rem;
}

.lookup-info p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.93rem;
}

.lookup-form {
  display: flex;
  gap: 0.65rem;
}

.lookup-form input,
.field-group input {
  flex: 1;
  width: 100%;
  padding: 0.68rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: var(--bg-subtle);
  color: var(--text-primary);
  font: inherit;
  font-size: 0.94rem;
}

.lookup-card > .status-banner {
  grid-column: 1 / -1;
  margin-top: 0;
}

/* Plans */
.limits-section h2,
.faq-section h2 {
  margin: 0 0 1.35rem;
  font-size: 1.45rem;
  letter-spacing: -0.015em;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.plan-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.45rem;
}

.plan-featured {
  border-color: var(--border-strong);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.9), var(--bg-surface));
}

.plan-card h3 {
  margin: 0 0 0.3rem;
  font-size: 1.08rem;
}

.plan-price {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--brand-color);
  font-weight: 600;
}

.plan-card ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.faq-list details {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.2rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.96rem;
  list-style-position: outside;
}

.faq-list details p {
  margin: 0.75rem 0 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding-block: 1.6rem;
  background: rgba(11, 16, 27, 0.9);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.footer-inner p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--text-secondary);
}

/* Legal & Error Subpages */
.prose-card {
  max-width: 780px;
  margin-inline: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
}

.prose-card h1 {
  margin-top: 0;
  font-size: 1.75rem;
}

.prose-card h2 {
  margin-top: 1.6rem;
  font-size: 1.15rem;
}

.prose-card p,
.prose-card li {
  color: var(--text-secondary);
}

/* Dialog */
.auth-dialog {
  width: min(430px, calc(100% - 2rem));
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
}

.auth-dialog::backdrop {
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(4px);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.dialog-header h2 {
  margin: 0;
  font-size: 1.18rem;
}

.icon-close {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.icon-close:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.12);
}

.dialog-subtitle {
  margin: 0.55rem 0 1.2rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.field-group {
  margin-bottom: 0.95rem;
}

.field-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

@media (max-width: 920px) {
  .hero-upload,
  .lookup-card,
  .plans-grid {
    grid-template-columns: 1fr;
  }

  .nav-list {
    display: none;
  }
}

@media (max-width: 560px) {
  .metrics-row {
    grid-template-columns: 1fr;
  }

  .lookup-form {
    flex-direction: column;
  }
}