/* ── Reset & Base ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0f1117;
  --surface:  #1a1d27;
  --border:   #2a2d3a;
  --accent:   #4f8ef7;
  --accent2:  #6c757d;
  --text:     #e2e4ed;
  --text-dim: #8b8fa8;
  --ok:       #4caf7d;
  --err:      #e05c5c;
  --radius:   8px;
  --font:     -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, monospace;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Nav ──────────────────────────────────────────────────────────── */
nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand { font-weight: 700; font-size: 1rem; letter-spacing: .03em; }
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: .875rem;
}
.nav-links a:hover { color: var(--text); }

/* ── Main ─────────────────────────────────────────────────────────── */
main {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

h1 { font-size: 1.6rem; margin-bottom: 1.5rem; }
h2 { font-size: 1.1rem; margin-bottom: 1rem; color: var(--text-dim); }

/* ── Card ─────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

/* ── Login Box ────────────────────────────────────────────────────── */
.login-box {
  max-width: 380px;
  margin: 5rem auto 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
}
.login-box h1 { font-size: 1.4rem; margin-bottom: .25rem; }
.login-box .subtitle { color: var(--text-dim); font-size: .85rem; margin-bottom: 1.5rem; }
.login-box label {
  display: block;
  text-align: left;
  font-size: .8rem;
  color: var(--text-dim);
  margin-bottom: .3rem;
  margin-top: 1rem;
}
.login-box input[type="text"],
.login-box input[type="password"] {
  width: 100%;
  padding: .55rem .75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-size: .9rem;
  outline: none;
}
.login-box input:focus { border-color: var(--accent); }
.login-box button {
  width: 100%;
  margin-top: 1.5rem;
}

/* ── Form fields ──────────────────────────────────────────────────── */
.field-row {
  margin-bottom: 1.1rem;
}
.field-row label {
  display: block;
  font-size: .8rem;
  color: var(--text-dim);
  margin-bottom: .35rem;
}
.field-row select,
.field-row input[type="file"] {
  display: block;
  width: 100%;
  padding: .55rem .75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-size: .9rem;
}
.field-row select:focus { outline: none; border-color: var(--accent); }
.field-row small { display: block; color: var(--text-dim); font-size: .75rem; margin-top: .3rem; }

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: .55rem 1.2rem;
  border-radius: 5px;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: opacity .15s;
}
.btn:hover { opacity: .85; }
.btn-primary   { background: var(--accent);  color: #fff; }
.btn-secondary { background: var(--border);  color: var(--text); }
.btn-small { padding: .3rem .75rem; font-size: .8rem; }

.button-row {
  display: flex;
  gap: .75rem;
  margin-top: 1.25rem;
}

/* ── Alert ────────────────────────────────────────────────────────── */
.alert {
  padding: .75rem 1rem;
  border-radius: 5px;
  margin-bottom: 1.25rem;
  font-size: .875rem;
}
.alert-error { background: #3a1a1a; border: 1px solid var(--err); color: var(--err); }

/* ── Tables ───────────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}
thead th {
  text-align: left;
  padding: .5rem .75rem;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
tbody td {
  padding: .6rem .75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(255,255,255,.03); }
.filename { font-family: monospace; font-size: .8rem; word-break: break-all; }
.empty { color: var(--text-dim); font-size: .875rem; padding: .5rem 0; }

/* ── Summary Table ────────────────────────────────────────────────── */
.summary-table { max-width: 600px; }
.summary-table th {
  width: 150px;
  color: var(--text-dim);
  font-weight: 500;
  padding: .6rem .75rem;
  vertical-align: top;
}
.summary-table td { padding: .6rem .75rem; }
.status-ok  { color: var(--ok);  font-weight: 600; }
.status-err { color: var(--err); font-weight: 600; }

/* ── Engine Output ────────────────────────────────────────────────── */
.engine-output {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1rem;
  font-family: monospace;
  font-size: .8rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 500px;
  overflow-y: auto;
  color: #a8d8a8;
}

/* ── Footer ───────────────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 1.25rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  font-size: .75rem;
}