:root {
  --bg0: #0f1c18;
  --bg1: #163028;
  --bg2: #1d3d32;
  --ink: #e8f2ec;
  --muted: #9bb5a8;
  --accent: #d4a017;
  --accent-ink: #1a1405;
  --line: rgba(232, 242, 236, 0.14);
  --danger: #ff7b7b;
  --ok: #6ddea0;
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(212, 160, 23, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(109, 222, 160, 0.12), transparent 50%),
    linear-gradient(160deg, var(--bg0), var(--bg1) 45%, var(--bg2));
}

[hidden] { display: none !important; }

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.login-card {
  width: min(420px, 100%);
  border: 1px solid var(--line);
  background: rgba(8, 18, 14, 0.55);
  backdrop-filter: blur(8px);
  padding: 1.5rem 1.35rem 1.25rem;
}

.login-error {
  margin: 0;
  color: var(--danger);
  font-size: 0.9rem;
}

.page {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
}

.header {
  margin-bottom: 1.75rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: 1px solid transparent;
}

.back-link:hover {
  border-bottom-color: var(--muted);
}

.brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  letter-spacing: -0.03em;
  line-height: 1;
}

.tagline {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.panel {
  border: 1px solid var(--line);
  background: rgba(8, 18, 14, 0.45);
  backdrop-filter: blur(8px);
  padding: 1.25rem;
}

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

.field {
  display: grid;
  gap: 0.45rem;
}

.field > span {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

input[type="password"],
input[type="text"],
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
  color: var(--ink);
  border-radius: 0;
  padding: 0.75rem 0.85rem;
  font: inherit;
}

textarea {
  resize: vertical;
  min-height: 8rem;
  line-height: 1.45;
}

input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
}

.file-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.file-path {
  display: block;
  padding: 0.55rem 0.7rem;
  border: 1px dashed var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  word-break: break-all;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
}

.btn {
  border: 0;
  cursor: pointer;
  padding: 0.75rem 1.15rem;
  font: inherit;
  font-weight: 600;
}

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

.btn.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn:disabled {
  opacity: 0.55;
  cursor: wait;
}

.link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.link:hover { border-bottom-color: var(--muted); }

.result {
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
  padding-top: 1.1rem;
}

.result-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.7rem;
}

.result-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
}

.status {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: lowercase;
}

.status.ok { color: var(--ok); }
.status.err { color: var(--danger); }
.status.busy { color: var(--accent); }

.result-box {
  margin: 0;
  min-height: 220px;
  max-height: 520px;
  overflow: auto;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
  .file-row { flex-direction: column; align-items: stretch; }
}