/* Guest Fire styles */
:root {
  --bg: #0f0f12;
  --surface: #16161a;
  --surface-2: #1e1e24;
  --text: #e6e6eb;
  --muted: #a1a1aa;
  --primary: #ff6b6b;
  --primary-2: #fcbf49;
  --accent: #5eead4;
  --success: #22c55e;
  --danger: #ef4444;
  --shadow: rgba(0,0,0,0.35);
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: linear-gradient(120deg, #0c0c12, #12121a 60%, #0d0d13);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}
#app { max-width: 1100px; margin: 0 auto; }
.hidden { display: none !important; }
.view { padding: 16px; }

/* Auth */
.auth-card {
  max-width: 420px;
  margin: 10vh auto;
  background: var(--surface);
  border: 1px solid #242434;
  border-radius: var(--radius);
  box-shadow: 0 12px 40px var(--shadow);
  padding: 24px;
}
.brand { text-align: center; margin-bottom: 16px; }
.brand .logo { font-size: 38px; }
.brand .title { font-weight: 700; font-size: 26px; margin-top: 8px; }
.brand .subtitle { color: var(--muted); font-size: 14px; }
.tabs { display: flex; gap: 8px; margin: 18px 0; }
.tab-btn { flex: 1; background: var(--surface-2); border: 1px solid #2a2a3d; color: var(--text); padding: 10px; border-radius: 10px; cursor: pointer; }
.tab-btn.active { border-color: var(--primary); color: #fff; }
.form { display: none; }
.form.active { display: grid; gap: 12px; }
label span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
input, textarea {
  width: 100%; background: #121219; border: 1px solid #26263a; color: var(--text);
  padding: 10px 12px; border-radius: 10px; outline: none;
}
textarea { resize: vertical; }
button { cursor: pointer; border: none; }
button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #111; font-weight: 700; padding: 10px 14px; border-radius: 12px;
}
button.ghost { background: transparent; color: var(--muted); border: 1px solid #2a2a3d; padding: 8px 12px; border-radius: 10px; }

/* Header */
#app-header { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid #252537; background: rgba(18, 18, 26, 0.8); backdrop-filter: blur(10px); }
#app-header .brand-name { font-weight: 700; letter-spacing: 0.4px; margin-left: 8px; }
#app-header #search { width: 220px; }

/* Bottom nav */
.bottom-nav { position: sticky; bottom: 0; display: grid; grid-template-columns: repeat(5,1fr); gap: 8px; padding: 10px; background: rgba(18, 18, 26, 0.8); border-top: 1px solid #252537; backdrop-filter: blur(10px); }
.nav-btn { background: var(--surface-2); color: var(--text); border: 1px solid #2a2a3d; border-radius: 12px; padding: 10px; }
.nav-btn.active { border-color: var(--accent); color: #fff; }

/* Composer */
.composer { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; background: var(--surface); border: 1px solid #232338; border-radius: var(--radius); padding: 12px; margin-bottom: 16px; }
.composer input[type="text"], .composer input[type="url"] { width: 100%; }
.avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 2px solid #2a2a3d; }
.avatar.xl { width: 96px; height: 96px; }

/* Cards */
.list { display: grid; gap: 12px; }
.card { background: var(--surface); border: 1px solid #232338; border-radius: var(--radius); box-shadow: 0 6px 28px var(--shadow); overflow: hidden; }
.card .content { padding: 12px; }
/* Cabeçalho do post estilo Instagram */
.post-header { display: flex; align-items: center; justify-content: space-between; }
.post-header .left { display: flex; align-items: center; gap: 10px; }
.post-header .username { font-weight: 600; }
.post-header .menu { color: var(--muted); }
/* Mídia com proporção 4:5 e corte elegante */
.card .media { background: #0b0b12; }
.card .media img, .card .media video {
  width: 100%; display: block; object-fit: cover;
  aspect-ratio: 4 / 5; /* parecido com Instagram */
}
/* Barra de ações semelhante ao Instagram */
.card .meta { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 13px; padding: 10px 12px; border-top: 1px solid #24243a; }
 .actions { display: flex; gap: 8px; }
 .icon-btn { background: transparent; border: none; color: var(--text); padding: 6px; border-radius: 8px; cursor: pointer; }
 .icon-btn:hover { background: #191926; }
 .btn { background: #141420; color: var(--text); border: 1px solid #2a2a3d; padding: 8px 10px; border-radius: 10px; }
 .btn.like.active, .icon-btn.like.active { color: #fff; background: #1e1620; border: 1px solid #3a2a3d; }
 .like-count { font-weight: 600; color: var(--text); }
 .meta-right { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; }
 /* Comentários */
 .comments { border-top: 1px solid #24243a; }
 .comments.collapsed { display: none; }
 .comments-list { display: grid; gap: 10px; padding: 10px 12px 0 12px; }
 .comment-input { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 10px 12px 12px 12px; }
 .comment { background: transparent; }
 .comment .meta-row .avatar { width: 28px; height: 28px; border-width: 1px; }

/* Messages */
.messages-layout { display: grid; grid-template-columns: 260px 1fr; gap: 12px; }
.people { background: var(--surface); border: 1px solid #232338; border-radius: var(--radius); padding: 12px; }
.person { display: flex; gap: 10px; align-items: center; padding: 8px; border-radius: 10px; cursor: pointer; }
.person.active { background: #141420; border: 1px solid #2a2a3d; }
.dm-header { padding: 8px 12px; color: var(--muted); }
.dm-thread { height: 380px; overflow: auto; background: var(--surface); border: 1px solid #232338; border-radius: var(--radius); padding: 12px; }
.msg { max-width: 64%; margin: 8px 0; padding: 10px 12px; border-radius: 14px; }
.msg.me { margin-left: auto; background: #212133; border: 1px solid #2f2f46; }
.msg.them { margin-right: auto; background: #1a1a2a; border: 1px solid #2a2a3d; }
.dm-input { margin-top: 8px; display: grid; grid-template-columns: 1fr auto; gap: 8px; }

/* Profile */
.profile-top { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid #232338; border-radius: var(--radius); padding: 12px; margin-bottom: 16px; }
.profile-info { flex: 1; display: grid; gap: 10px; }
.profile-actions { display: flex; gap: 10px; align-items: center; }
.upload { display: inline-flex; align-items: center; gap: 6px; background: #141420; color: var(--text); border: 1px solid #2a2a3d; padding: 8px 10px; border-radius: 10px; cursor: pointer; }
.upload input { display: none; }

/* Grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }

/* Utility */
.meta-row { display: flex; align-items: center; gap: 8px; }
.small { font-size: 12px; color: var(--muted); }

/* Responsive */
@media (max-width: 860px) {
  #app-header #search { display: none; }
}
@media (max-width: 720px) {
  .messages-layout { grid-template-columns: 1fr; }
  .people { order: 2; }
  .chat { order: 1; }
}