:root{--bg:#0a0e1a;--bg-alt:#0f1328;--surface:rgba(255,255,255,.04);--surface-h:rgba(255,255,255,.07);--text:rgba(255,255,255,.90);--muted:rgba(255,255,255,.50);--border:rgba(255,255,255,.08);--accent:#818cf8;--accent-dim:#6366f1;--accent-bg:rgba(129,140,248,.08);--shadow:0 4px 32px rgba(0,0,0,.35);--radius:14px;--radius-sm:10px;--max-w:1060px;--header-h:64px;--font:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;color-scheme:dark}
[data-theme="light"]{--bg:#f4f5fb;--bg-alt:#eaecf6;--surface:rgba(99,102,241,.04);--surface-h:rgba(99,102,241,.07);--text:rgba(0,0,0,.86);--muted:rgba(0,0,0,.50);--border:rgba(99,102,241,.10);--accent:#4f46e5;--accent-dim:#4338ca;--accent-bg:rgba(79,70,229,.06);--shadow:0 4px 32px rgba(99,102,241,.10);color-scheme:light}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.62;-webkit-font-smoothing:antialiased;transition:background-color .35s ease,color .35s ease}
a{color:inherit;text-decoration:none;transition:color .2s}a:hover{color:var(--accent)}
img{max-width:100%;display:block}ul{list-style:none}strong{font-weight:700}

.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}.accent{color:var(--accent)}
.dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:var(--muted);vertical-align:middle;margin:0 8px}
.skip{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{left:16px;top:16px;width:auto;height:auto;padding:10px 14px;border-radius:var(--radius-sm);background:var(--surface-h);border:1px solid var(--border);z-index:200}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--radius-sm);font-weight:600;font-size:.93rem;border:none;cursor:pointer;transition:transform .18s,box-shadow .18s,background .18s;text-decoration:none}
.btn:hover{transform:translateY(-2px);text-decoration:none}.btn:active{transform:translateY(0)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 18px rgba(129,140,248,.30)}
.btn-primary:hover{box-shadow:0 6px 24px rgba(129,140,248,.45);color:#fff}
[data-theme="light"] .btn-primary{color:#fff}
.btn-outline{background:transparent;color:var(--text);border:1.5px solid var(--border)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{padding:8px 16px;font-size:.86rem}
.btn-icon{width:40px;height:40px;border-radius:var(--radius-sm);display:grid;place-items:center;background:var(--surface);border:1px solid var(--border);cursor:pointer;color:var(--text);transition:background .18s,transform .18s}
.btn-icon:hover{background:var(--surface-h);transform:translateY(-2px)}

/* Theme icons */
.icon{display:none}:root .sun{display:block}:root .moon{display:none}
[data-theme="light"] .sun{display:none}[data-theme="light"] .moon{display:block}

/* Header */
.site-header{position:sticky;top:0;z-index:100;height:var(--header-h);backdrop-filter:blur(16px) saturate(1.6);-webkit-backdrop-filter:blur(16px) saturate(1.6);background:color-mix(in srgb,var(--bg) 80%,transparent);border-bottom:1px solid var(--border);transition:background .35s}
.header-inner{display:flex;align-items:center;height:100%;gap:12px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}.brand:hover{color:var(--text)}
.avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:.8rem;background:linear-gradient(135deg,var(--accent),var(--accent-dim));color:#fff;flex-shrink:0}
.brand-text{display:flex;flex-direction:column;line-height:1.2}.brand-name{font-weight:700;font-size:.9rem}.brand-role{font-size:.78rem;color:var(--muted)}

.nav{display:flex;gap:2px;margin-left:auto}
.nav a{position:relative;padding:8px 12px;border-radius:8px;font-size:.86rem;color:var(--muted);transition:color .18s,background .18s}
.nav a::after{content:'';position:absolute;bottom:2px;left:50%;width:0;height:2px;background:var(--accent);border-radius:2px;transition:width .25s,left .25s}
.nav a:hover{color:var(--text);background:var(--surface)}.nav a:hover::after{width:60%;left:20%}
.nav-active{color:var(--accent)!important;background:var(--accent-bg)!important}
.header-actions{display:flex;gap:8px;margin-left:8px}
.hamburger,.hamburger::before,.hamburger::after{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.25s}
.hamburger{position:relative}.hamburger::before,.hamburger::after{content:'';position:absolute;left:0}
.hamburger::before{top:-6px}.hamburger::after{top:6px}
.mobile-only{display:none}

@media(max-width:860px){
  .nav{position:fixed;inset:var(--header-h) 0 0 0;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:color-mix(in srgb,var(--bg) 97%,transparent);backdrop-filter:blur(24px);opacity:0;pointer-events:none;transform:translateY(-12px);transition:opacity .3s,transform .3s;z-index:90}
  .nav.open{opacity:1;pointer-events:auto;transform:translateY(0)}.nav a{font-size:1.1rem;padding:12px 28px}
  .mobile-only{display:grid}
}

/* Hero */
.hero{padding:72px 0 40px}
.hero-inner{display:grid;grid-template-columns:1.35fr .65fr;gap:40px;align-items:start}
.hero-tag{display:inline-block;font-size:.88rem;color:var(--accent);margin-bottom:12px;font-weight:600}
.hero h1{font-size:clamp(1.65rem,3vw,2.4rem);line-height:1.18;margin-bottom:16px;letter-spacing:-.01em}
.subtitle{color:var(--muted);font-size:1.02rem;max-width:580px;line-height:1.7}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 18px}
.hero-links{display:flex;gap:6px;flex-wrap:wrap;font-size:.88rem;color:var(--muted);align-items:center}
.hero-links a{color:var(--text);transition:color .2s}.hero-links a:hover{color:var(--accent)}

.highlight-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:border-color .3s,transform .3s}
.highlight-card:hover{border-color:color-mix(in srgb,var(--accent) 25%,var(--border));transform:translateY(-3px)}
.highlight-label{font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:16px;font-weight:600}
.checklist{display:grid;gap:14px}.checklist li{position:relative;padding-left:28px;font-size:.93rem}
.checklist li::before{content:"✓";position:absolute;left:0;top:0;color:var(--accent);font-weight:800}

@media(max-width:860px){.hero{padding:48px 0 28px}.hero-inner{grid-template-columns:1fr;gap:28px}}

/* Sections */
.section{padding:60px 0}.section-head{margin-bottom:32px}
.section-head h2{font-size:1.55rem;margin-bottom:6px;letter-spacing:-.01em}

/* Grid */
.grid{display:grid;gap:20px}
.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:860px){.cols-3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.cols-2,.cols-3{grid-template-columns:1fr}.container{padding:0 16px}.section{padding:44px 0}.hero h1{font-size:1.45rem}.subtitle{font-size:.95rem}}

/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .25s,border-color .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 25%,var(--border));box-shadow:var(--shadow)}
.card h3{font-size:1.02rem;margin-bottom:8px}.card p{margin-top:4px}.card-icon{font-size:1.5rem;margin-bottom:12px}

/* Timeline */
.timeline{position:relative;padding-left:32px}
.timeline::before{content:'';position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:var(--border);border-radius:2px}
.tl-item{position:relative;padding-bottom:32px}.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:-32px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--bg);border:2.5px solid var(--accent);z-index:2;transition:box-shadow .4s,background .4s}
.tl-item.revealed .tl-dot{background:var(--accent);box-shadow:0 0 0 6px var(--accent-bg)}
.tl-content{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .25s,border-color .25s,box-shadow .25s}
.tl-content:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 20%,var(--border));box-shadow:var(--shadow)}
.tl-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap;margin-bottom:4px}
.tl-header h3{font-size:1.05rem}
.tl-badge{font-size:.78rem;color:var(--accent);background:var(--accent-bg);padding:4px 12px;border-radius:999px;white-space:nowrap;font-weight:600}
.tl-role{color:var(--muted);font-size:.9rem;margin-bottom:12px}
.tl-item ul{padding-left:20px;display:grid;gap:8px;list-style:disc}.tl-item li{font-size:.93rem}.tl-item li::marker{color:var(--accent)}
.timeline-compact .tl-item{padding-bottom:24px}.timeline-compact .tl-content{padding:20px}

@media(max-width:600px){.timeline{padding-left:24px}.tl-dot{left:-24px;width:12px;height:12px;top:8px}.timeline::before{left:5px}.tl-content{padding:18px}.tl-header{flex-direction:column;gap:6px}}

/* Tags */
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.tags li{padding:5px 14px;border-radius:999px;background:var(--accent-bg);border:1px solid var(--border);font-size:.84rem;transition:border-color .2s,transform .2s}
.tags li:hover{border-color:var(--accent);transform:translateY(-2px)}

/* Projects */
.project-card{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}

/* Contact */
.contact-links{display:grid;gap:14px;margin-top:18px}
.contact-links a{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--border);transition:border-color .2s,transform .2s}
.contact-links a:hover{border-color:var(--accent);transform:translateX(4px);color:var(--text)}.cl-icon{font-size:1.1rem;flex-shrink:0}

.form{display:grid;gap:16px}.field{display:grid;gap:5px}label{font-weight:600;font-size:.88rem}
input,textarea{width:100%;padding:11px 14px;border-radius:var(--radius-sm);border:1.5px solid var(--border);background:color-mix(in srgb,var(--bg) 60%,var(--surface));color:var(--text);font-family:var(--font);font-size:.93rem;transition:border-color .2s,box-shadow .2s}
input:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}
.field-error{min-height:16px;color:#f87171;font-size:.8rem}[data-theme="light"] .field-error{color:#dc2626}
.form-status{margin-top:2px;font-size:.9rem}.firebase-hint{margin-top:8px;font-size:.84rem}
summary{cursor:pointer;color:var(--muted)}code{font-family:var(--mono);font-size:.84rem;background:var(--surface-h);padding:2px 6px;border-radius:4px}

/* Footer */
.site-footer{padding:28px 0;border-top:1px solid var(--border);margin-top:20px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:.88rem}
.back-top{color:var(--muted);transition:color .2s}.back-top:hover{color:var(--accent)}

/* Scroll reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .55s ease,transform .55s ease;transition-delay:var(--delay,0s)}
.reveal.revealed{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0s!important;transition-duration:0s!important}html{scroll-behavior:auto}.reveal{opacity:1;transform:none}}

/* ═══════ Blog Styles ═══════ */

/* Blog page hero */
.page-hero{padding:48px 0 20px}
.page-hero h1{font-size:clamp(1.6rem,2.8vw,2.2rem);margin:14px 0 10px}
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:.88rem;color:var(--muted);transition:color .2s}
.back-link:hover{color:var(--accent)}

/* Blog page — vertical list of horizontal cards */
.blog-page-container{display:flex;flex-direction:column;gap:20px}

.blog-list-card{display:grid;grid-template-columns:240px 1fr;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .25s,border-color .25s,box-shadow .25s}
.blog-list-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 25%,var(--border));box-shadow:var(--shadow)}

.blog-img--list{width:100%;height:100%;overflow:hidden;background:var(--surface-h)}
.blog-img--list img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.blog-list-card:hover .blog-img--list img{transform:scale(1.03)}

.blog-list-body{padding:20px 24px;display:flex;flex-direction:column}
.blog-list-title{font-size:1.05rem;line-height:1.35;margin-bottom:8px}
.blog-list-title a{transition:color .2s}.blog-list-title a:hover{color:var(--accent)}
.blog-list-excerpt{font-size:.9rem;color:var(--muted);line-height:1.6;margin-bottom:12px;flex:1}

/* Shared blog elements */
.blog-meta{display:flex;align-items:center;gap:6px;font-size:.82rem;color:var(--muted);margin-bottom:10px}
.blog-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.blog-tag{font-size:.76rem;padding:3px 10px;border-radius:999px;background:var(--accent-bg);border:1px solid var(--border);color:var(--muted)}
.blog-read{display:inline-flex;align-items:center;gap:5px;font-size:.88rem;font-weight:600;color:var(--accent);margin-top:auto;transition:gap .2s}
.blog-read:hover{gap:8px;color:var(--accent)}
.blog-img-placeholder{display:grid;place-items:center;font-size:2rem;color:var(--muted)}

/* Homepage preview — 3-col grid */
.blog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.blog-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .25s,border-color .25s,box-shadow .25s}
.blog-card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 25%,var(--border));box-shadow:var(--shadow)}
.blog-card .blog-img{width:100%;aspect-ratio:16/9;overflow:hidden;background:var(--surface-h)}
.blog-card .blog-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.blog-card:hover .blog-img img{transform:scale(1.03)}
.blog-body{padding:18px;display:flex;flex-direction:column;flex:1}
.blog-title{font-size:1rem;line-height:1.35;margin-bottom:8px}
.blog-title a{transition:color .2s}.blog-title a:hover{color:var(--accent)}
.blog-excerpt{font-size:.88rem;color:var(--muted);line-height:1.55;margin-bottom:12px;flex:1}

.blog-cta{text-align:center;margin-top:28px}
.blog-loading{text-align:center;padding:56px 20px}
.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 14px}
@keyframes spin{to{transform:rotate(360deg)}}
.blog-error{text-align:center;padding:56px 20px}.blog-error p{margin-bottom:8px}

@media(max-width:860px){.blog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.blog-list-card{grid-template-columns:200px 1fr}}
@media(max-width:600px){.blog-grid{grid-template-columns:1fr}.blog-list-card{grid-template-columns:1fr}.blog-img--list{aspect-ratio:16/9;height:auto}.blog-list-body{padding:16px}}