/* About Section */
#about-content { columns: 320px; column-gap:2rem; }
.about-columns { display:flex; gap:2.5rem; }
.about-col { flex:1 1 0; min-width:220px; }
@media (max-width: 700px) { .about-columns { flex-direction:column; gap:1.2rem; } }
@media (max-width: 700px) { #about-content { columns: 1; } .nav { flex-wrap:wrap; } }
* { box-sizing: border-box; }
html, body { margin:0; padding:0; font-family: 'Inter', system-ui, Arial, sans-serif; background:#fff; color:#1a237e; }
body { line-height:1.6; }
.container { width: min(900px, 96%); margin:0 auto; }
a { color:#1a237e; text-decoration:none; font-weight:500; }
a:hover { color:#3949ab; text-decoration:underline; }

.container { width: min(900px, 96%); margin:0 auto; }
/* Header */
.site-header.light-header { position:sticky; top:0; background:#fff; border-bottom:1px solid #e3e7ee; z-index:10; box-shadow:0 2px 8px -4px #e3e7ee; }
.header-inner { display:flex; align-items:center; justify-content:space-between; padding:0.75rem 0; }
#site-title { font-size:1.7rem; letter-spacing:0.5px; margin:0; font-weight:700; color:#1a237e; }
.nav { list-style:none; display:flex; gap:1.2rem; padding:0; margin:0; }
.nav a { padding:0.4rem 0.7rem; border-radius:6px; transition: background .2s; color:#1a237e; font-weight:500; }
.nav a:hover { background:#e3e7ee; color:#3949ab; }
main { padding:2rem 0 3rem; }
.panel.card { margin-bottom:2rem; padding:1.5rem 1.25rem 1.75rem; background:#fff; border:1px solid #e3e7ee; border-radius:14px; box-shadow:0 4px 14px -6px #e3e7ee; }
.panel h2 { margin-top:0; font-size:1.18rem; letter-spacing:0.5px; font-weight:600; color:#1a237e; }
.chips { list-style:none; padding:0; margin:0; display:flex; flex-wrap:wrap; gap:0.5rem; }
.chips li { background:#e3e7ee; color:#1a237e; border:1px solid #d0d7de; padding:0.45rem 0.75rem; font-size:0.8rem; font-weight:500; border-radius:100px; }
.chips.subgroup { margin-top:0.35rem; }
.skill-group { list-style:none; margin:0 0 0.75rem; }
.skill-group > strong { display:block; font-size:0.7rem; letter-spacing:1px; text-transform:uppercase; color:#3949ab; }
.chips { list-style:none; padding:0; margin:0; display:flex; flex-wrap:wrap; gap:0.5rem; }
.chips li { background:#e3e7ee; color:#2d3a4a; border:1px solid #d0d7de; padding:0.45rem 0.75rem; font-size:0.8rem; font-weight:500; border-radius:100px; }
.chips.subgroup { margin-top:0.35rem; }
.skill-group { list-style:none; margin:0 0 0.75rem; }
.skill-group > strong { display:block; font-size:0.7rem; letter-spacing:1px; text-transform:uppercase; color:#7a869a; }
.item { margin-bottom:1.25rem; background:#f5f7fa; border-radius:10px; padding:1rem 1.2rem; box-shadow:0 2px 8px -6px #e3e7ee; }
.item h3 { margin:0 0 0.25rem; font-size:1.08rem; font-weight:600; color:#1a237e; }
.item .meta { font-size:0.75rem; text-transform:uppercase; letter-spacing:1px; color:#7a869a; margin-bottom:0.35rem; }
.item p { margin:0 0 0.4rem; font-size:0.92rem; color:#222e3a; }
.site-footer.light-footer { text-align:center; padding:1.5rem 0 2rem; color:#7a869a; font-size:0.8rem; border-top:1px solid #e3e7ee; background:#fff; }
.hidden { display:none; }
#theme-toggle { background:#fff; border:1px solid #e3e7ee; color:#1a237e; padding:0.4rem 0.6rem; border-radius:6px; cursor:pointer; font-size:0.8rem; }
#theme-toggle:hover { background:#e3e7ee; }
.downloads a { display:inline-block; margin-right:0.75rem; font-size:0.8rem; background:#e3e7ee; border:1px solid #d0d7de; padding:0.4rem 0.65rem; border-radius:6px; color:#1a237e; }
.downloads a:hover { background:#d0d7de; text-decoration:none; color:#3949ab; }
.contact-icons { display:flex; gap:1.2rem; margin-top:0.5rem; }
.icon { width:28px; height:28px; vertical-align:middle; filter: grayscale(0.2) brightness(0.7); transition: filter .2s; }
.contact-icons a:hover .icon { filter: none; }
@media (max-width: 700px) { #about-content { columns: 1; } .nav { flex-wrap:wrap; } }
#theme-toggle { background:#fff; border:1px solid #e3e7ee; color:#2d3a4a; padding:0.4rem 0.6rem; border-radius:6px; cursor:pointer; font-size:0.8rem; }
#theme-toggle:hover { background:#e3e7ee; }
.downloads a { display:inline-block; margin-right:0.75rem; font-size:0.8rem; background:#e3e7ee; border:1px solid #d0d7de; padding:0.4rem 0.65rem; border-radius:6px; color:#2d3a4a; }
.downloads a:hover { background:#d0d7de; text-decoration:none; }
.contact-icons { display:flex; gap:1.2rem; margin-top:0.5rem; }
.icon { width:28px; height:28px; vertical-align:middle; filter: grayscale(0.2) brightness(0.7); transition: filter .2s; }
.contact-icons a:hover .icon { filter: none; }
@media (max-width: 700px) { #about-content { columns: 1; } .nav { flex-wrap:wrap; } }

/* Hero */
.hero { background: linear-gradient(180deg, rgba(26,35,126,0.06), rgba(255,255,255,0)); border-bottom:1px solid #e3e7ee; }
.hero-inner { padding: 3.2rem 0 2rem; text-align:center; }
.hero h1 { font-size:2.2rem; margin:0 0 0.25rem; color:#1a237e; }
.hero p { margin:0 0 1rem; color:#7a869a; font-size:1.05rem; }
.hero .btn { display:inline-block; margin:0.25rem; padding:0.6rem 0.9rem; border-radius:8px; border:1px solid #d0d7de; background:#e3e7ee; color:#1a237e; font-weight:600; }
.hero .btn:hover { background:#d0d7de; text-decoration:none; color:#3949ab; }
.hero .btn.secondary { background:#fff; color:#1a237e; border-color:#e3e7ee; }
.hero .btn.secondary:hover { background:#e3e7ee; }

/* Light theme */
:root.light, .light body { background:#f5f7fa; color:#1b2430; }
.light .site-header { background:rgba(255,255,255,0.85); border-color:#d0d7de; }
.light .panel { background:#ffffff; border-color:#d0d7de; box-shadow:0 4px 14px -6px rgba(0,0,0,0.08); }
.light a { color:#0366d6; }
.light .chips li, .light .downloads a { background:#0366d622; color:#0550ae; border-color:#0366d655; }
.light .item .meta { color:#4f5b66; }
.light #theme-toggle { background:#ffffff; border-color:#d0d7de; color:#1b2430; }
.light .more-btn { background:#f0f2f5; border-color:#d0d7de; color:#1b2430; }
.light .site-footer { background:#ffffff; border-color:#d0d7de; color:#4f5b66; }
@media (max-width: 700px) { #about-content { columns: 1; } .nav { flex-wrap:wrap; } }