/* ============================================================
   Alif Farianto — Profile Site
   Design system: ink dark + emerald/gold accent
   Fonts: Space Grotesk (display) + IBM Plex Sans (body)
   ============================================================ */
:root{
  /* palette (dark default) */
  --bg:#0a0f14;
  --bg-2:#0e151c;
  --surface:#111a22;
  --surface-2:#16212b;
  --ink:#e8eef2;
  --muted:#9fb0bd;
  --muted-2:#7d8e9c;
  --line:rgba(255,255,255,.08);
  --accent:#22c98a;          /* emerald */
  --accent-2:#f2c14e;        /* gold */
  --accent-ink:#06131c;
  --ok:#22c98a;
  --radius:16px;
  --shadow:0 24px 60px -30px rgba(0,0,0,.7);
  --font-display:'Space Grotesk',system-ui,sans-serif;
  --font-body:'IBM Plex Sans',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,monospace;
  --nav-h:72px;
}
[data-theme="light"]{
  --bg:#f4f7f9;
  --bg-2:#eef3f6;
  --surface:#ffffff;
  --surface-2:#f0f5f7;
  --ink:#0d1a23;
  --muted:#4a5b68;
  --muted-2:#566878;
  --line:rgba(13,26,35,.12);
  --shadow:0 24px 60px -32px rgba(13,26,35,.28);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 12px)}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
  overflow-x:hidden;
  transition:background .35s ease,color .35s ease;
}
h1,h2,h3{font-family:var(--font-display);line-height:1.12;font-weight:600;letter-spacing:-.01em}
.mono{font-family:var(--mono)}
em{font-style:normal;color:var(--accent)}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:var(--accent-ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ---------- Background mesh ---------- */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.bg-orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.bg-orb-1{width:520px;height:520px;background:radial-gradient(circle,#22c98a22,transparent 70%);top:-120px;left:-80px;animation:drift 26s ease-in-out infinite alternate}
.bg-orb-2{width:600px;height:600px;background:radial-gradient(circle,#f2c14e1a,transparent 70%);bottom:-160px;right:-100px;animation:drift 32s ease-in-out infinite alternate-reverse}
.bg-grid{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 30%,transparent 75%);opacity:.5}
@keyframes drift{to{transform:translate(60px,40px) scale(1.1)}}

/* ---------- Layout ---------- */
.section{max-width:1120px;margin:0 auto;padding:clamp(80px,12vh,140px) 24px;position:relative}
.section-head{margin-bottom:clamp(32px,6vh,56px)}
.section-kicker{color:var(--accent);font-size:13px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:12px}
.section-title{font-size:clamp(26px,4.6vw,42px);text-wrap:balance}
.section-title em{color:var(--accent)}

/* ---------- Nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:color-mix(in srgb,var(--bg) 78%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);height:var(--nav-h)}
.nav-inner{max-width:1120px;margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-family:var(--font-display);font-weight:700;font-size:22px;letter-spacing:-.02em}
.brand-dot{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:14.5px;color:var(--muted);transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav-links a.active{color:var(--accent)}
.theme-toggle{background:none;border:1px solid var(--line);border-radius:10px;width:38px;height:38px;cursor:pointer;display:grid;place-items:center;color:var(--ink)}
.theme-icon{display:none;font-size:16px}
[data-theme="dark"] .theme-moon,[data-theme="light"] .theme-sun{display:block}
.nav-toggle{display:none;background:none;border:0;width:40px;height:40px;cursor:pointer}
.nav-toggle span{display:block;height:2px;width:22px;background:var(--ink);margin:5px auto;transition:.25s}
.nav.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.open .nav-toggle span:nth-child(2){opacity:0}
.nav.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{min-height:100svh;display:grid;align-items:center;padding-top:var(--nav-h)}
.hero-inner{max-width:1120px;margin:0 auto;padding:0 24px;width:100%}
.hero-eyebrow{color:var(--accent);font-family:var(--mono);font-size:14px;margin-bottom:18px;letter-spacing:.04em}
.hero-name{font-size:clamp(44px,9vw,88px);font-weight:700;letter-spacing:-.03em;line-height:1}
.hero-roles{font-size:clamp(19px,3.2vw,30px);color:var(--muted);font-weight:500;min-height:1.4em;margin:16px 0 20px}
.caret{display:inline-block;width:2px;height:1em;background:var(--accent);margin-left:3px;vertical-align:text-bottom;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.hero-lede{max-width:560px;color:var(--muted);font-size:clamp(16px,2vw,18px);margin-bottom:32px}
.hero-lede strong{color:var(--ink);font-weight:600}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:12px;font-family:var(--font-display);font-weight:600;font-size:15.5px;transition:transform .15s ease,box-shadow .2s,background .2s;cursor:pointer}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 14px 34px -14px var(--accent)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -14px var(--accent)}
.btn-ghost{border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.hero-meta{list-style:none;display:flex;gap:20px;flex-wrap:wrap;color:var(--muted-2);font-size:13.5px;align-items:center}
.pill-ok{color:var(--ok)}
.hero-scroll{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);width:24px;height:38px;border:2px solid var(--line);border-radius:14px}
.hero-scroll span{position:absolute;left:50%;top:7px;width:4px;height:8px;background:var(--accent);border-radius:2px;transform:translateX(-50%);animation:scroll 1.6s ease-in-out infinite}
@keyframes scroll{0%{opacity:1;top:7px}70%{opacity:0;top:20px}100%{opacity:0;top:7px}}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:300px 1fr;gap:clamp(30px,5vw,64px);align-items:center}
.about-visual{position:relative}
.profile-frame{position:relative;width:100%;aspect-ratio:1;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line)}
.profile-photo{width:100%;height:100%;object-fit:cover;object-position:center top;display:block}
.profile-sheen{position:absolute;inset:0;pointer-events:none;background:linear-gradient(120deg,transparent 40%,rgba(255,255,255,.22) 50%,transparent 60%);transform:translateX(-100%);animation:sheen 6s ease-in-out infinite}
.monogram::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 40%,rgba(255,255,255,.22) 50%,transparent 60%);transform:translateX(-100%);animation:sheen 6s ease-in-out infinite}
@keyframes sheen{0%,55%{transform:translateX(-100%)}90%,100%{transform:translateX(100%)}}
.about-text p{color:var(--muted);margin-bottom:16px}
.about-text strong{color:var(--ink)}
.about-points{list-style:none;margin-top:18px;display:grid;gap:10px}
.about-points li{padding-left:26px;position:relative;color:var(--ink);font-size:15px}
.about-points li::before{content:"";position:absolute;left:4px;top:0.55em;width:9px;height:9px;border-radius:2px;background:var(--accent)}

/* ---------- Skills ---------- */
.skill-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.skill-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .25s ease,border-color .25s}
.skill-card:hover{transform:translateY(-4px);border-color:var(--accent)}
.skill-card h3{display:flex;align-items:center;gap:12px;font-size:17px;margin-bottom:10px}
.skill-card .num{color:var(--accent);font-size:13px;border:1px solid color-mix(in srgb,var(--accent) 40%,transparent);border-radius:8px;padding:3px 8px}
.skill-card p{color:var(--muted);font-size:14.5px;margin-bottom:14px}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags span{font-family:var(--mono);font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:4px 11px}

/* ---------- Services ---------- */
.service-list{display:grid;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.service-row{display:grid;grid-template-columns:56px 1fr 1.2fr;gap:20px;align-items:baseline;padding:24px 28px;border-bottom:1px solid var(--line);transition:background .2s}
.service-row:last-child{border-bottom:0}
.service-row:hover{background:var(--surface)}
.service-num{color:var(--accent-2);font-size:15px}
.service-row h3{font-size:18px}
.service-row p{color:var(--muted);font-size:14.5px}

/* ---------- Projects ---------- */
.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.project-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:10px;transition:transform .25s,border-color .25s}
.project-card:hover{transform:translateY(-4px);border-color:var(--accent-2)}
.project-tag{color:var(--accent);font-size:12px;letter-spacing:.1em;text-transform:uppercase}
.project-card h3{font-size:19px}
.project-card p{color:var(--muted);font-size:14.5px;flex:1}

/* ---------- Contact ---------- */
.contact-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(28px,5vw,48px)}
.contact-lede{font-size:clamp(18px,2.6vw,24px);color:var(--ink);max-width:560px;margin-bottom:28px;font-family:var(--font-display);line-height:1.3}
.contact-links{display:grid;gap:14px}
.contact-item{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--line);border-radius:12px;color:var(--ink);transition:border-color .2s,background .2s}
a.contact-item:hover{border-color:var(--accent);background:var(--surface-2)}
.contact-label{font-family:var(--font-body);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);min-width:86px}
.contact-icon{width:24px;height:24px;flex:none;color:var(--accent)}

/* ---------- Footer ---------- */
.footer{text-align:center;padding:40px 24px 48px;color:var(--muted-2);font-size:13.5px;border-top:1px solid var(--line)}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:860px){
  .skill-grid,.project-grid{grid-template-columns:1fr 1fr}
  .about-grid{grid-template-columns:1fr}
  .about-visual{max-width:260px}
  .service-row{grid-template-columns:1fr;gap:8px;padding:20px 22px}
  .service-num{display:none}
}
@media (max-width:600px){
  .skill-grid,.project-grid{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .nav-links{position:fixed;top:var(--nav-h);right:0;bottom:0;width:min(78vw,320px);flex-direction:column;align-items:flex-start;gap:8px;padding:28px 28px;background:var(--bg-2);border-left:1px solid var(--line);transform:translateX(100%);transition:transform .3s ease}
  .nav.open .nav-links{transform:translateX(0)}
  .nav-links a{font-size:17px;padding:8px 0}
  .theme-toggle{position:absolute;bottom:36px}
  .hero-meta{gap:12px;flex-direction:column;align-items:flex-start}
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .bg-orb,.hero-scroll span,.monogram::after,.profile-sheen,.caret{animation:none!important}
  .reveal{opacity:1;transform:none;transition:none}
}