:root{
  --bg:#0d1230;
  --bg-elev:rgba(18,24,48,0.96);
  --text:#e9edf5;
  --muted:#b0b8d0;
  --card:rgba(255,255,255,0.06);
  --border:rgba(255,255,255,0.12);
  --accent:#7f5af0;
  --accent-2:#1dd1a1;
  --shadow:0 18px 70px rgba(0,0,0,.28);
  --radius:18px;
  --space:16px;
  --font:"Inter", "Helvetica Neue", system-ui, -apple-system, sans-serif;
}
[data-theme="light"]{
  --bg:#f6f7fb; --bg-elev:#ffffff; --text:#0f172a; --muted:#4b5568;
  --card:rgba(0,0,0,0.04); --border:rgba(0,0,0,0.10); --shadow:0 20px 50px rgba(0,0,0,.08);
}
*{box-sizing:border-box;}
body{margin:0;background:radial-gradient(110% 140% at 15% 20%,rgba(127,90,240,0.2),transparent 45%),
  radial-gradient(120% 120% at 80% 0%,rgba(29,209,161,0.15),transparent 38%),var(--bg);
  color:var(--text);font-family:var(--font);line-height:1.6;}
a{color:var(--accent);text-decoration:none;}

/* ─ Skip link ──────────────────────────────────────── */
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;}
.skip-link:focus{position:fixed;top:0;left:0;width:auto;height:auto;padding:10px 18px;
  background:var(--accent);color:#fff;font-weight:600;font-size:14px;z-index:9999;
  border-radius:0 0 10px 0;text-decoration:none;outline:none;}

/* ─ Topbar ─────────────────────────────────────────── */
.topbar{position:sticky;top:0;z-index:20;
  background:rgba(13,18,48,0.88);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(16px);}
[data-theme="light"] .topbar{background:rgba(246,247,251,0.92);}
.topbar-inner{display:flex;align-items:center;gap:12px;padding:12px 20px;}
.topbar-brand{font-weight:700;font-size:16px;letter-spacing:.3px;color:var(--text);}
.topbar-brand a{color:inherit;text-decoration:none;}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:8px;}

/* ─ Sidebar toggle button ────────────────────────── */
.sidebar-toggle{display:flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;border:1px solid var(--border);
  background:var(--card);color:var(--text);font-size:18px;cursor:pointer;
  transition:background .15s,border-color .15s;flex-shrink:0;}
.sidebar-toggle:hover{background:rgba(127,90,240,.18);border-color:rgba(127,90,240,.4);}

/* ─ Sidebar overlay ──────────────────────────────── */
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);
  z-index:30;backdrop-filter:blur(3px);}
.sidebar-overlay.open{display:block;}

/* ─ Sidebar drawer ───────────────────────────────── */
.sidebar{position:fixed;top:0;left:0;bottom:0;width:280px;
  background:var(--bg-elev);border-right:2px solid var(--border);
  z-index:40;transform:translateX(-100%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;overflow-y:auto;}
.sidebar.open{transform:translateX(0);}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;
  padding:18px 20px;border-bottom:1px solid var(--border);}
.sidebar-name{font-weight:700;font-size:17px;color:var(--text);}
.sidebar-close{display:flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:8px;border:1px solid var(--border);
  background:none;color:var(--text);font-size:20px;cursor:pointer;
  transition:background .12s;}
.sidebar-close:hover{background:rgba(248,113,113,.15);color:#f87171;border-color:rgba(248,113,113,.3);}
.sidebar-nav{padding:10px 0;}
.sidebar-nav a{display:flex;align-items:center;padding:11px 22px;color:var(--text);
  font-size:14px;font-weight:500;text-decoration:none;transition:background .1s,color .1s;
  border-left:3px solid transparent;}
.sidebar-nav a:hover{background:rgba(127,90,240,.1);color:var(--accent);border-left-color:rgba(127,90,240,.4);}
.sidebar-section-title{padding:14px 22px 6px;font-size:11px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted);}
.sidebar-posts{padding:0 0 10px;}
.sidebar-posts a{display:block;padding:8px 22px;color:var(--muted);font-size:13px;
  text-decoration:none;transition:color .1s,background .1s;border-left:3px solid transparent;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sidebar-posts a:hover{color:var(--accent);background:rgba(127,90,240,.07);border-left-color:rgba(127,90,240,.3);}
.sidebar-footer{margin-top:auto;padding:16px 20px;border-top:1px solid var(--border);}
.sidebar-footer button{width:100%;padding:9px;border-radius:10px;border:1px solid var(--border);
  background:var(--card);color:var(--text);font:inherit;font-size:13px;cursor:pointer;transition:background .12s;}
.sidebar-footer button:hover{background:rgba(127,90,240,.15);border-color:rgba(127,90,240,.35);}

/* ─ Layout ──────────────────────────────────────────── */
.hero{padding:80px 24px 60px;max-width:1140px;margin:0 auto;
  display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
.glass{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);backdrop-filter:blur(10px);}
.btn{display:inline-flex;align-items:center;padding:12px 20px;border-radius:14px;
  border:1px solid var(--border);background:linear-gradient(120deg,var(--accent),#4c6fff);
  color:#fff;font-weight:600;font:inherit;box-shadow:0 12px 30px rgba(127,90,240,.25);
  transition:transform .12s ease,box-shadow .12s ease;cursor:pointer;text-decoration:none;}
.btn:hover{transform:translateY(-1px);box-shadow:0 16px 36px rgba(127,90,240,.32);}
.section{padding:60px 24px;max-width:1140px;margin:0 auto;}
.section h2{margin:0 0 18px;font-size:30px;letter-spacing:-0.02em;}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;}
.card{padding:20px;border-radius:var(--radius);background:var(--card);
  border:1px solid var(--border);box-shadow:var(--shadow);position:relative;overflow:hidden;}
.card::after{content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 20% 20%,rgba(255,255,255,0.06),transparent 40%);
  pointer-events:none;}
.timeline{border-left:2px solid var(--border);padding-left:18px;
  display:flex;flex-direction:column;gap:14px;list-style:none;margin:0;}
.timeline .item{position:relative;padding-left:6px;}
.timeline .item::before{content:"";position:absolute;left:-25px;top:6px;width:12px;height:12px;
  border-radius:50%;background:var(--accent);border:2px solid var(--bg);}
.grid-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;}
.badge{display:inline-block;padding:6px 12px;border-radius:999px;
  background:rgba(127,90,240,0.14);color:var(--accent);font-weight:600;border:1px solid rgba(127,90,240,.2);}
footer{padding:40px 24px;text-align:center;color:var(--muted);border-top:1px solid var(--border);}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease;}
.reveal.visible{opacity:1;transform:none;}

/* ─ Contact form ────────────────────────────────────── */
.contact-form{display:flex;flex-direction:column;gap:12px;max-width:540px;}
.contact-form input,.contact-form textarea{width:100%;}
.contact-notice{padding:10px 14px;border-radius:10px;font-size:13px;margin-bottom:12px;}
.contact-notice.success{background:rgba(29,209,161,.1);border:1px solid rgba(29,209,161,.3);color:#1dd1a1;}
.contact-notice.error{background:rgba(248,113,113,.1);border:1px solid rgba(248,113,113,.3);color:#f87171;}

/* ─ CV section ──────────────────────────────────────── */
.cv-text{white-space:pre-wrap;font-family:var(--font);font-size:14px;
  line-height:1.8;color:var(--text);max-width:760px;}

/* ─ Form elements ───────────────────────────────────── */
input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]),
select,textarea{
  display:block;width:100%;padding:10px 14px;
  border:1px solid var(--border);border-radius:10px;
  background:var(--bg-elev);color:var(--text);font:inherit;font-size:14px;
  outline:none;transition:border-color .15s,box-shadow .15s;
}
input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]):focus,
select:focus,textarea:focus{
  border-color:var(--accent);box-shadow:0 0 0 3px rgba(127,90,240,.15);
}
textarea{resize:vertical;min-height:100px;}
select{cursor:pointer;}
button,input[type="submit"]{font:inherit;cursor:pointer;}
.form-stack{display:flex;flex-direction:column;gap:10px;}

/* ─ Post / reading view ─────────────────────────────── */
.post-body{color:var(--text);white-space:pre-line;line-height:1.9;font-size:16px;max-width:680px;}

/* ─ Social links ────────────────────────────────────── */
.social-links{display:flex;gap:14px;justify-content:center;margin-top:8px;flex-wrap:wrap;}
.social-links a{color:var(--muted);font-size:14px;transition:color .12s ease;}
.social-links a:hover{color:var(--accent);}

/* ─ Admin bar (logged-in) ───────────────────────────── */
.admin-bar{position:fixed;bottom:20px;right:20px;z-index:999;display:flex;gap:6px;
  background:var(--bg-elev);border:1px solid var(--border);border-radius:14px;
  padding:8px 14px;backdrop-filter:blur(14px);box-shadow:var(--shadow);align-items:center;}
.admin-bar a{font-size:13px;text-decoration:none;font-weight:500;}

/* ─ Focus styles ────────────────────────────────────── */
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]):focus-visible,
select:focus-visible,textarea:focus-visible{outline:none;}

/* ─ Responsive ──────────────────────────────────────── */
@media(max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:32px;}
}