:root {
  --accent: #2f6bff;
  --text-dark: #1b2440;
  --text-muted: #5b6478;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.6);
  --card-bg: rgba(255, 255, 255, 0.72);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: "Poppins", "Inter", "Segoe UI", system-ui, sans-serif;
  color: var(--text-dark);
}

body {
  background:
    radial-gradient(circle at 15% 15%, #fbe8cf 0%, transparent 45%),
    linear-gradient(135deg, #dce9ff 0%, #b9cdfa 35%, #5b7fe0 70%, #24408f 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

body.has-bg-image {
  background-image: var(--bg-image-url);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.page-wrap {
  max-width: 1440px;
  margin: 0 auto;
  padding: 48px 40px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: 340px;
  flex-shrink: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
}

.avatar-frame {
  width: 190px;
  height: 190px;
  margin: 0 auto 20px;
  border-radius: var(--radius-md);
  background: #f2f4fb;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-frame img { width: 100%; height: 100%; object-fit: cover; }
.avatar-frame .avatar-placeholder { font-size: 64px; color: #b9c1d9; }

.profile-name {
  font-size: 28px;
  font-weight: 700;
  margin: 4px 0 14px;
}
.profile-name .accent { color: var(--accent); }

.profile-badge {
  display: inline-block;
  background: #eef1f8;
  color: var(--text-muted);
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 26px;
}

.contact-info { text-align: left; display: flex; flex-direction: column; gap: 14px; }
.contact-row { display: flex; align-items: center; gap: 14px; }
.contact-icon {
  width: 42px; height: 42px; flex-shrink: 0;
  background: #eef1f8; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.contact-icon svg { width: 20px; height: 20px; }
.contact-label { font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: #9aa2b8; margin-bottom: 2px; }
.contact-value { font-size: 15px; font-weight: 500; color: var(--text-dark); word-break: break-word; }

.social-row { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.social-row a {
  width: 38px; height: 38px; min-width: 38px; min-height: 38px;
  flex: 0 0 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dark); background: #eef1f8;
  transition: background .15s, color .15s;
}
.social-row a:hover { background: var(--accent); color: #fff; }
.social-row svg { width: 18px; height: 18px; }

/* ---------- Content panel ---------- */
.content-panel {
  flex: 1;
  background: var(--card-bg);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 26px 44px 48px;
  min-height: 640px;
}

.nav-tabs {
  display: flex;
  justify-content: flex-end;
  gap: 34px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  margin-bottom: 32px;
}
.nav-tabs a {
  text-decoration: none;
  color: var(--text-dark);
  font-size: 16px;
  font-weight: 500;
  padding-bottom: 6px;
}
.nav-tabs a.active { color: var(--accent); font-weight: 700; }

.page-title { font-size: 34px; font-weight: 800; margin: 0 0 12px; }
.title-underline { width: 46px; height: 4px; background: var(--accent); border-radius: 4px; margin-bottom: 28px; }

.section-title { font-size: 24px; font-weight: 700; margin: 40px 0 18px; }
.lead-text { font-size: 16px; line-height: 1.75; color: var(--text-dark); margin-bottom: 16px; }

/* generic card */
.card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 26px;
}
.card-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.card-grid-2 .card { display: flex; gap: 16px; align-items: flex-start; }
.card-icon { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.card-icon svg { width: 26px; height: 26px; }
.card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 700; }
.card p { margin: 0; font-size: 14.5px; line-height: 1.6; color: var(--text-muted); }

/* ---------- Resume: skills ---------- */
.skills-card { background: #fff; border-radius: var(--radius-md); padding: 30px 34px; }
.skill-row { margin-bottom: 26px; }
.skill-row:last-child { margin-bottom: 0; }
.skill-row .skill-label { font-size: 16px; margin-bottom: 10px; }
.skill-row .skill-label b { font-weight: 700; }
.skill-bar-track { height: 8px; border-radius: 6px; background: #eef1f8; overflow: hidden; }
.skill-bar-fill { height: 100%; background: var(--accent); border-radius: 6px; }

/* ---------- Journey ---------- */
.journey-header { display: flex; align-items: center; gap: 14px; margin: 44px 0 22px; }
.journey-header .icon-box {
  width: 44px; height: 44px; border-radius: 12px; background: #eef1f8;
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.journey-list { border-left: 2px solid #e3e7f3; padding-left: 26px; display: flex; flex-direction: column; gap: 30px; }
.journey-item { position: relative; }
.journey-item::before {
  content: ""; position: absolute; left: -32px; top: 6px;
  width: 10px; height: 10px; border-radius: 50%; background: var(--accent);
}
.journey-item h4 { margin: 0 0 4px; font-size: 17px; font-weight: 700; }
.journey-item .journey-year { color: var(--accent); font-weight: 600; margin-bottom: 8px; display: inline-block; }
.journey-item p { margin: 0; color: var(--text-muted); line-height: 1.7; }

/* ---------- Portfolio ---------- */
.filter-tabs { display: flex; gap: 28px; margin-bottom: 30px; flex-wrap: wrap; }
.filter-tabs a { text-decoration: none; color: var(--text-muted); font-weight: 500; font-size: 15px; }
.filter-tabs a.active { color: var(--accent); font-weight: 700; }
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.portfolio-card { display: block; text-decoration: none; color: inherit; }
.portfolio-thumb {
  border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 16/10.2;
  background: #dfe6fb; margin-bottom: 14px;
}
.portfolio-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.portfolio-card h3 { margin: 0 0 4px; font-size: 17px; font-weight: 700; }
.portfolio-card span { color: var(--text-muted); font-size: 14px; }

/* ---------- Thread ---------- */
.thread-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.thread-card { background: #fff; border-radius: var(--radius-md); padding: 26px; display: block; text-decoration: none; color: inherit; }
.thread-meta { color: var(--text-muted); font-size: 14px; margin-bottom: 10px; }
.thread-meta .read-time { color: var(--accent); font-weight: 600; }
.thread-card h3 { font-size: 19px; font-weight: 700; margin: 0 0 10px; line-height: 1.35; }
.thread-card p { color: var(--text-muted); font-size: 14.5px; line-height: 1.65; margin: 0 0 16px; }
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; }
.tag-pill {
  border: 1px solid var(--accent); color: var(--accent);
  border-radius: 999px; padding: 5px 14px; font-size: 13px; font-weight: 500;
}

/* ---------- Inside world / grid ---------- */
.inside-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.inside-grid .card { background: #fff; }
.inside-grid .card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.inside-grid .card-head .card-icon svg { width: 22px; height: 22px; }
.inside-grid .card-head h3 { margin: 0; font-size: 17px; }
.inside-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px; }
.inside-list li { font-size: 14.5px; line-height: 1.55; color: var(--text-muted); }

/* ---------- Contact form ---------- */
.contact-card { background: #fff; border-radius: var(--radius-md); padding: 30px; margin-top: 20px; }
.contact-heading { color: var(--accent); font-size: 24px; font-weight: 800; margin: 0 0 8px; }
.contact-sub { color: var(--text-muted); margin: 0 0 24px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.form-input, .form-textarea {
  width: 100%; border: none; border-bottom: 1.5px solid #e3e7f3; background: transparent;
  padding: 10px 4px; font-size: 15px; font-family: inherit; color: var(--text-dark);
}
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--accent); }
.form-textarea { resize: vertical; min-height: 110px; }
.btn-send {
  background: var(--accent); color: #fff; border: none; border-radius: 12px;
  padding: 13px 26px; font-size: 15px; font-weight: 600; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px; margin-top: 20px;
}
.btn-send:hover { opacity: .92; }

/* ---------- Comments ---------- */
.comment-list { display: flex; flex-direction: column; gap: 18px; margin: 24px 0; }
.comment-item { background: #fff; border-radius: var(--radius-sm); padding: 18px 20px; }
.comment-item .c-name { font-weight: 700; margin-right: 10px; }
.comment-item .c-date { color: var(--text-muted); font-size: 13px; }
.comment-item p { margin: 8px 0 0; color: var(--text-dark); line-height: 1.6; }
.comment-empty { color: var(--text-muted); font-style: italic; }

.alert { padding: 14px 18px; border-radius: 12px; margin-bottom: 20px; font-size: 14.5px; }
.alert-success { background: #e6f4ea; color: #1e7a3c; }
.alert-error { background: #fdeaea; color: #b3261e; }

.post-body { font-size: 16px; line-height: 1.85; color: var(--text-dark); }
.post-cover { border-radius: var(--radius-md); overflow: hidden; margin-bottom: 26px; }
.post-cover img { width: 100%; display: block; }

@media (max-width: 980px) {
  .page-wrap { flex-direction: column; padding: 20px; }
  .sidebar { width: 100%; }
  .content-panel { padding: 24px; }
  .nav-tabs { justify-content: flex-start; flex-wrap: wrap; gap: 18px; }
  .card-grid-2, .inside-grid, .portfolio-grid, .thread-grid, .form-grid { grid-template-columns: 1fr; }
}

/* ---------- SPA helpers ---------- */
.hidden { display: none !important; }
.loading-text { color: var(--text-muted); font-style: italic; padding: 20px 0; }
.skeleton { background: linear-gradient(90deg,#eef1f8 25%,#f6f8fc 37%,#eef1f8 63%); background-size: 400% 100%; animation: sk 1.4s ease infinite; border-radius: 10px; }
@keyframes sk { 0% {background-position:100% 50%;} 100% {background-position:0 50%;} }
.field-error { color: #b3261e; font-size: 13px; margin-top: 4px; }