:root {
  --bg: #f5f0e6;
  --card: #ffffff;
  --ink: #1f2a1f;
  --accent: #2f6f43;
  --accent-strong: #235534;
  --line: #d9d2c3;
  --warn: #7a2e2e;
  --ok: #245c35;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(47, 111, 67, 0.15), transparent 45%),
    radial-gradient(circle at bottom left, rgba(140, 102, 46, 0.1), transparent 40%),
    var(--bg);
  min-height: 100vh;
}

header {
  background: linear-gradient(100deg, #214b2f, #2f6f43 55%, #7b8f4a);
  color: #fff;
  padding: 1.25rem 1rem;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15);
}

.header-wrap {
  width: min(1100px, 95vw);
  margin: 0 auto;
}

h1 {
  margin: 0;
  font-size: 1.7rem;
  letter-spacing: 0.02em;
}

.subtitle {
  margin-top: 0.35rem;
  opacity: 0.9;
}

main {
  width: min(1100px, 95vw);
  margin: 1rem auto 2rem;
}

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

.menu a {
  text-decoration: none;
  color: #fff;
  background: var(--accent);
  border: 1px solid transparent;
  padding: 0.55rem 0.85rem;
  border-radius: 0.45rem;
  transition: transform 0.12s ease, background 0.12s ease;
}

.menu a:hover,
.menu a:focus-visible {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  box-shadow: 0 5px 18px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.viewer {
  width: 100%;
  min-height: 72vh;
  border: 0;
  background: #fff;
}

.notice {
  margin-top: 0.75rem;
  font-size: 0.95rem;
}

.auth-area,
.upload-area {
  width: min(760px, 95vw);
  margin: 1.25rem auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  box-shadow: 0 5px 18px rgba(0, 0, 0, 0.08);
  padding: 1rem;
}

.field {
  margin-bottom: 0.9rem;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

input[type="file"] {
  width: 100%;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: #fff;
}

button {
  appearance: none;
  border: 0;
  border-radius: 0.4rem;
  padding: 0.58rem 1rem;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 600;
}

button:hover,
button:focus-visible {
  background: var(--accent-strong);
}

.status-list {
  margin: 0 0 0.9rem;
  padding-left: 1.1rem;
}

.status-list li {
  margin-bottom: 0.35rem;
}

.ok {
  color: var(--ok);
}

.warn {
  color: var(--warn);
}

footer {
  width: min(1100px, 95vw);
  margin: 1rem auto 2rem;
  font-size: 0.9rem;
  color: #425142;
}

@media (max-width: 700px) {
  h1 {
    font-size: 1.4rem;
  }

  .viewer {
    min-height: 64vh;
  }
}