:root {
  --portal-green: #7CFF3E;
  --portal-green-dim: #3fae1f;
  --portal-blue: #35d7ff;
  --portal-blue-dim: #1c86a8;
  --ink: #eaf6ef;
  --ink-dim: #9db3ac;
  --bg-deep: #05100c;
  --bg-panel: rgba(10, 26, 22, 0.72);
  --bg-panel-solid: #0c211b;
  --danger: #ff5d5d;
  --radius: 14px;
  --border: 1px solid rgba(124, 255, 62, 0.18);
  font-size: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg-deep);
  color: var(--ink);
  font-family: 'Segoe UI', 'Trebuchet MS', system-ui, sans-serif;
}

/* ---------- page background ---------- */
body {
  background:
    radial-gradient(ellipse 900px 700px at 50% 40%, rgba(53, 215, 255, 0.16), transparent 60%),
    radial-gradient(ellipse 1200px 900px at 50% 50%, rgba(124, 255, 62, 0.10), transparent 65%),
    linear-gradient(180deg, #030a08 0%, #05100c 40%, #071812 100%);
  background-attachment: fixed;
}

/* ---------- layout shell ---------- */
.topbar, .stage, .foot { position: relative; z-index: 1; }

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  padding: 18px 28px;
  border-bottom: var(--border);
  background: linear-gradient(180deg, rgba(5, 16, 12, 0.85), rgba(5, 16, 12, 0.4));
  backdrop-filter: blur(6px);
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.3px; }
.brand-mark {
  width: 16px; height: 16px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--portal-green), var(--portal-blue) 70%, transparent 100%);
  box-shadow: 0 0 12px 2px rgba(124, 255, 62, 0.7);
}
.brand-name { font-size: 1.15rem; }

.tabs { display: flex; gap: 8px; flex-wrap: wrap; flex: 1; }

.tab-btn {
  background: transparent;
  border: 1px solid rgba(234, 246, 239, 0.12);
  color: var(--ink-dim);
  padding: 9px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.15s ease;
}
.tab-btn:hover:not(:disabled) { border-color: var(--portal-blue); color: var(--ink); }
.tab-btn.active {
  background: linear-gradient(135deg, rgba(124,255,62,0.18), rgba(53,215,255,0.18));
  border-color: var(--portal-green);
  color: var(--ink);
  box-shadow: 0 0 14px rgba(124,255,62,0.15);
}
.tab-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.user-box { display: flex; align-items: center; gap: 12px; color: var(--ink-dim); font-size: 0.9rem; }
#whoami { color: var(--portal-green); font-weight: 600; }

/* ---------- stage / cards ---------- */
.stage {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 20px 80px;
  min-height: calc(100vh - 130px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.card {
  position: relative;
  width: 100%;
  max-width: 460px;
  background: var(--bg-panel);
  border: var(--border);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(10px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
  animation: rise 0.35s ease;
}
.card.wide { max-width: 720px; }

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-glow {
  position: absolute;
  inset: -1px;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, var(--portal-green), var(--portal-blue));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.5;
  pointer-events: none;
}
.card-glow.blue { background: linear-gradient(135deg, var(--portal-blue), var(--portal-blue-dim)); }
.card-glow.green { background: linear-gradient(135deg, var(--portal-green), var(--portal-green-dim)); }

.card h2 { margin: 0 0 18px; font-size: 1.35rem; }

/* ---------- auth switch + forms ---------- */
.auth-switch {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.04);
  padding: 4px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.switch-btn {
  flex: 1;
  padding: 9px 0;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-dim);
  cursor: pointer;
  font-size: 0.9rem;
}
.switch-btn.active {
  background: linear-gradient(135deg, var(--portal-green), var(--portal-blue));
  color: #04140d;
  font-weight: 700;
}

.form { display: none; flex-direction: column; gap: 14px; }
.form.active { display: flex; }

label { display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; color: var(--ink-dim); }

input[type="text"], input[type="email"], input[type="password"], textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(234,246,239,0.14);
  border-radius: 8px;
  padding: 11px 12px;
  color: var(--ink);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease;
}
input:focus, textarea:focus { border-color: var(--portal-green); }
textarea { resize: vertical; }

.checkbox-row { flex-direction: row; align-items: center; gap: 8px; }
.checkbox-row input { width: 16px; height: 16px; }

/* ---------- buttons ---------- */
.btn {
  border: none;
  border-radius: 8px;
  padding: 11px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.15s ease;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--portal-green), var(--portal-blue));
  color: #04140d;
  box-shadow: 0 6px 20px rgba(124,255,62,0.2);
}
.btn-primary:hover { box-shadow: 0 6px 26px rgba(53,215,255,0.35); }

.btn-secondary {
  background: rgba(53,215,255,0.12);
  color: var(--portal-blue);
  border: 1px solid rgba(53,215,255,0.35);
}
.btn-secondary:hover { background: rgba(53,215,255,0.2); }

.btn-ghost {
  background: transparent;
  color: var(--ink-dim);
  border: 1px solid rgba(234,246,239,0.16);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--portal-blue); }

.btn-small { padding: 6px 12px; font-size: 0.78rem; }
.btn-danger { background: rgba(255,93,93,0.12); color: var(--danger); border: 1px solid rgba(255,93,93,0.4); }
.btn-danger:hover { background: rgba(255,93,93,0.22); }
.btn-like { background: rgba(124,255,62,0.12); color: var(--portal-green); border: 1px solid rgba(124,255,62,0.4); }
.btn-like:hover { background: rgba(124,255,62,0.22); }
.btn-like.liked { background: linear-gradient(135deg, var(--portal-green), var(--portal-blue)); color: #04140d; }
.btn-unlike { background: rgba(53,215,255,0.10); color: var(--portal-blue); border: 1px solid rgba(53,215,255,0.4); }
.btn-unlike:hover { background: rgba(53,215,255,0.20); }

.form-msg { min-height: 18px; font-size: 0.83rem; margin: 0; }
.form-msg.ok { color: var(--portal-green); }
.form-msg.err { color: var(--danger); }

/* ---------- card headers / search ---------- */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.card-header h2 { margin: 0; }
.search-row { display: flex; gap: 8px; }
.search-row input {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(234,246,239,0.14);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--ink);
  font-size: 0.85rem;
}

/* ---------- post list ---------- */
.post-list { display: flex; flex-direction: column; gap: 14px; max-height: 60vh; overflow-y: auto; padding-right: 4px; }

.post-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(234,246,239,0.1);
  border-radius: 10px;
  padding: 16px 18px;
}
.post-card h3 { margin: 0 0 6px; font-size: 1.05rem; color: var(--ink); }
.post-meta { font-size: 0.75rem; color: var(--ink-dim); margin-bottom: 10px; display: flex; gap: 10px; flex-wrap: wrap; }
.post-meta .author { color: var(--portal-blue); }
.post-content { font-size: 0.9rem; line-height: 1.5; color: var(--ink); white-space: pre-wrap; margin: 0 0 12px; }
.post-actions { display: flex; gap: 8px; align-items: center; }
.like-count { font-size: 0.8rem; color: var(--ink-dim); }

.empty-msg { color: var(--ink-dim); font-size: 0.9rem; text-align: center; padding: 24px 0; }

/* ---------- footer ---------- */
.foot {
  text-align: center;
  padding: 14px;
  font-size: 0.75rem;
  color: var(--ink-dim);
  border-top: var(--border);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
#apiStatus.ok { color: var(--portal-green); }
#apiStatus.err { color: var(--danger); }
.foot-divider { color: rgba(234,246,239,0.25); }
.foot-credit a {
  color: var(--portal-blue);
  text-decoration: none;
  margin-left: 6px;
}
.foot-credit a:hover { text-decoration: underline; color: var(--portal-green); }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.85rem;
  background: var(--bg-panel-solid);
  border: var(--border);
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}
.toast.ok { color: var(--portal-green); border-color: rgba(124,255,62,0.4); }
.toast.err { color: var(--danger); border-color: rgba(255,93,93,0.4); }

/* ---------- responsive ---------- */
@media (max-width: 640px) {
  .topbar { padding: 14px 16px; gap: 12px; }
  .stage { padding: 24px 12px 60px; }
  .card { padding: 22px; }
}