:root {
  --bg: #0f1419;
  --panel: #1a2332;
  --panel-2: #243044;
  --text: #e7ecf3;
  --muted: #8b9bb4;
  --accent: #2aabee;
  --accent-2: #1a8bc7;
  --danger: #e74c3c;
  --ok: #2ecc71;
  --warn: #f39c12;
  --border: #2c3a4f;
  --radius: 10px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1a3a55 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #16304a 0%, transparent 50%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: rgba(26, 35, 50, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand a {
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  font-size: 1.05rem;
}
.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  align-items: center;
  font-size: 0.92rem;
}
.muted { color: var(--muted); }

.container {
  width: min(960px, calc(100% - 2rem));
  margin: 1.5rem auto 3rem;
}
.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 1.5rem;
}

h1 { font-size: 1.5rem; margin: 0 0 1rem; font-weight: 650; }
h2 { font-size: 1.1rem; margin: 0 0 0.75rem; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1rem;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.85rem 0 0.35rem;
}
input[type="text"],
input[type="password"],
input[type="file"],
textarea,
select {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
}
textarea { min-height: 140px; resize: vertical; line-height: 1.5; }
.hint { font-size: 0.8rem; color: var(--muted); margin-top: 0.35rem; }

.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font: inherit;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}
.btn:hover { background: var(--accent-2); text-decoration: none; }
.btn-secondary { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: var(--danger); }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.85rem; }

.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}
.alert-ok { background: rgba(46, 204, 113, 0.12); border-color: rgba(46, 204, 113, 0.35); color: #b8f0cd; }
.alert-error { background: rgba(231, 76, 60, 0.12); border-color: rgba(231, 76, 60, 0.35); color: #f5b7b1; }
.alert-warn { background: rgba(243, 156, 18, 0.12); border-color: rgba(243, 156, 18, 0.35); color: #f9e79f; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.7rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
}
.badge-ok { color: var(--ok); border-color: rgba(46,204,113,.35); }
.badge-fail { color: var(--danger); border-color: rgba(231,76,60,.35); }

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}
.login-card {
  width: min(400px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
}
.login-card h1 { text-align: center; margin-bottom: 0.25rem; }
.login-card .sub { text-align: center; color: var(--muted); margin-bottom: 1.25rem; font-size: 0.9rem; }

.preview-imgs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.preview-imgs img {
  width: 88px;
  height: 88px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.post-text {
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  max-width: 360px;
}

@media (max-width: 640px) {
  .topbar { flex-direction: column; align-items: flex-start; }
  table { display: block; overflow-x: auto; }
}

.fmt-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  margin: 0.35rem 0 0.5rem;
  padding: 0.45rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.fmt-toolbar button {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 6px;
  padding: 0.3rem 0.55rem;
  font: inherit;
  cursor: pointer;
  line-height: 1.2;
}
.fmt-toolbar button:hover { border-color: var(--accent); color: #fff; }
.fmt-toolbar .fmt-sep {
  width: 1px;
  height: 1.2rem;
  background: var(--border);
  margin: 0 0.15rem;
}
.fmt-emojis { display: flex; flex-wrap: wrap; gap: 0.25rem; }
.fmt-emoji { font-size: 1.05rem !important; padding: 0.2rem 0.35rem !important; }
textarea[name="text"] { min-height: 180px; line-height: 1.55; }