:root {
  --bg: #0b1020;
  --card: #141d38;
  --stroke: #2b3760;
  --text: #eef3ff;
  --muted: #9ba8cc;
  --primary: #7fd2ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, sans-serif;
  background: radial-gradient(circle at 10% 10%, #1a295d 0, var(--bg) 45%);
  color: var(--text);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--stroke);
  background: rgba(11, 16, 32, 0.92);
}

.brand { font-weight: 800; }
.brand span { color: var(--primary); }
.top-actions { display: flex; gap: 8px; }

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: linear-gradient(120deg, var(--primary), #9fe0ff);
  color: #05253c;
}
button.ghost {
  background: transparent;
  border: 1px solid var(--stroke);
  color: var(--text);
}

.layout {
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
}

.card {
  border: 1px solid var(--stroke);
  border-radius: 16px;
  background: var(--card);
}

.sidebar {
  display: grid;
  gap: 12px;
  align-self: start;
}

.profile { padding: 16px; text-align: center; }
.side-box { padding: 14px; }
.side-box ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); }

.avatar-wrap {
  width: 110px;
  height: 110px;
  margin: 0 auto 12px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid rgba(127, 210, 255, 0.65);
}
.avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: rotate(0deg) scale(1);
  transition: transform 1s cubic-bezier(0.22, 1, 0.36, 1);
}
.avatar-wrap:hover .avatar { transform: rotate(720deg) scale(1.12); }

.content { display: grid; gap: 14px; }
.hero { padding: 20px; }
.muted { color: var(--muted); }

.posts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.post-card {
  padding: 16px;
  border: 1px solid var(--stroke);
  border-radius: 14px;
  background: #101932;
  cursor: pointer;
}
.post-card h3 { margin: 0 0 8px; }
.meta { color: var(--muted); font-size: 0.9rem; }

.form { display: grid; gap: 10px; }
input, textarea {
  width: 100%;
  border: 1px solid var(--stroke);
  border-radius: 10px;
  padding: 10px 12px;
  background: #0f1730;
  color: var(--text);
  font: inherit;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 40;
}
.modal.hidden { display: none; }
.modal-card {
  width: min(860px, 100%);
  max-height: 90vh;
  overflow: auto;
  background: #131d39;
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 18px;
  position: relative;
}
.post-modal-card { width: min(760px, 100%); }
.close {
  position: absolute;
  right: 14px;
  top: 12px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--stroke);
  padding: 5px 9px;
}
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.comment-item {
  border-left: 2px solid var(--primary);
  padding-left: 10px;
  margin: 8px 0;
  color: #d2defd;
}

#message {
  margin: 8px 18px 24px;
  color: #9fffb8;
  min-height: 22px;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .posts { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}