:root {
  --bg: #f3f6f4;
  --bg-accent: #e4eee8;
  --ink: #1a2420;
  --muted: #4a5a52;
  --line: #c5d4cb;
  --brand: #0f5c45;
  --brand-dark: #0a3f30;
  --warn: #8a5a00;
  --error: #8b1e1e;
  --ok: #0f5c45;
  --panel: #ffffff;
  --shadow: 0 10px 30px rgba(26, 36, 32, 0.08);
  --radius: 14px;
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", serif;
  --font-body: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 500px at 10% -10%, #d9ebe2 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #dce6f0 0%, transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-accent) 100%);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: #000;
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 10;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1rem;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.02em;
  color: var(--brand-dark);
}

.tagline {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.layout {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
  display: grid;
  gap: 1.25rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.2;
  margin: 0 0 0.6rem;
}

h1 {
  font-size: 1.7rem;
}

.lead {
  margin: 0 0 1.25rem;
  color: var(--muted);
  max-width: 52ch;
}

.upload-form {
  display: grid;
  gap: 1rem;
}

.file-label {
  display: grid;
  gap: 0.25rem;
  border: 1.5px dashed var(--brand);
  border-radius: 12px;
  padding: 1.1rem 1rem;
  cursor: pointer;
  background: linear-gradient(180deg, #f7fbf8, #eef6f1);
}

.file-label:hover,
.file-label:focus-within {
  background: #e8f4ee;
}

.file-label-title {
  font-weight: 650;
  color: var(--brand-dark);
}

.file-label-hint {
  color: var(--muted);
  font-size: 0.95rem;
}

#file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  clip-path: inset(50%);
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.3rem;
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  width: fit-content;
}

.btn:hover {
  background: var(--brand-dark);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn:focus-visible,
a:focus-visible,
.file-label:focus-within {
  outline: 3px solid #c9a227;
  outline-offset: 2px;
}

.status {
  min-height: 1.4em;
  margin: 1rem 0 0;
  color: var(--muted);
}

.result.hidden {
  display: none;
}

.summary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.badge {
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.9rem;
  border: 1px solid var(--line);
  background: #f7faf8;
}

.badge.ok { color: var(--ok); border-color: #b7d7c8; background: #eaf6f0; }
.badge.warn { color: var(--warn); border-color: #e2c98a; background: #fff7e6; }
.badge.error { color: var(--error); border-color: #e2b0b0; background: #fdecec; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.actions a {
  display: inline-block;
  text-decoration: none;
  background: var(--brand);
  color: #fff;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  font-weight: 650;
}

.actions a.secondary {
  background: transparent;
  color: var(--brand-dark);
  border: 1.5px solid var(--brand);
}

.issues {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.issues li {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  background: #fbfcfb;
}

.issues .sev {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.25rem;
}

.sev.error { color: var(--error); }
.sev.warning { color: var(--warn); }
.sev.fixed { color: var(--ok); }
.sev.info { color: var(--muted); }

.site-footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .btn, .actions a {
    width: 100%;
    text-align: center;
  }
}