/* ============================================================
   site.css — Brian Song Portfolio
   Shared styles for index.html, resume.html, and all case studies
   ============================================================ */

/* RESET & BASE */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{
  --bg:#FFFFFF;--ink:#141414;--mid:#888888;
  --light:#AAAAAA;--warm:#E4E4E4;--ob:#111111;
  --accent:#6CC04A;
  --serif:'Cormorant Garamond',Georgia,serif;
  --sans:'DM Sans',system-ui,sans-serif;
  --mono:'DM Mono',monospace;
  --nav:'Space Grotesk',system-ui,sans-serif;
  --ease:cubic-bezier(0.16,1,0.3,1);
}
[data-theme="dark"]{--bg:#111111;--ink:#F0EDE8;--mid:#888885;--light:#555350;--warm:#262624;--ob:#0A0A0A;}
html{scroll-behavior:smooth;background:var(--bg);transition:background-color .4s ease;}
body{font-family:var(--sans);font-size:16px;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;overflow-x:hidden;transition:background-color .4s ease,color .4s ease;}


/* ============================================================
   FLOATING UI (dark mode toggle + back to top)
   ============================================================ */
#float-ui{position:fixed;right:max(24px,calc(env(safe-area-inset-right) + 16px));bottom:max(32px,calc(env(safe-area-inset-bottom) + 16px));z-index:200;display:flex;flex-direction:column;align-items:flex-end;gap:10px;}
#float-toggle,#back-top{height:42px;min-width:42px;width:42px;border-radius:999px;border:1px solid var(--warm);background:var(--bg);color:var(--mid);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 2px 12px rgba(0,0,0,.08);transition:background-color .4s,border-color .2s,color .2s,width .35s var(--ease),box-shadow .2s;overflow:hidden;white-space:nowrap;padding:0;}
@media(pointer:fine){#float-toggle:hover,#back-top:hover{border-color:var(--ink);color:var(--ink);box-shadow:0 4px 20px rgba(0,0,0,.14);width:136px;justify-content:flex-start;}}
#float-toggle .btn-icon,#back-top .btn-icon{min-width:40px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
#float-toggle .btn-label,#back-top .btn-label{font-family:var(--nav);font-size:11px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;color:var(--ink);opacity:0;width:0;overflow:hidden;transition:opacity .25s var(--ease) .05s,width .35s var(--ease);padding:0;}
@media(pointer:fine){#float-toggle:hover .btn-label,#back-top:hover .btn-label{opacity:1;width:80px;padding-right:12px;}}
#back-top{opacity:0;transform:translateY(10px);pointer-events:none;transition:opacity .3s var(--ease),transform .3s var(--ease),background-color .4s,border-color .2s,color .2s,width .35s var(--ease),box-shadow .2s;}
#back-top.vis{opacity:1;transform:translateY(0);pointer-events:auto;}
[data-theme="dark"] #float-toggle,[data-theme="dark"] #back-top{box-shadow:0 2px 12px rgba(0,0,0,.4);}


/* ============================================================
   NAV — Homepage variant
   ============================================================ */
nav{position:fixed;top:0;left:0;right:0;z-index:1000;display:flex;align-items:center;gap:12px;padding:20px 48px;padding-top:max(20px,env(safe-area-inset-top));background:rgba(255,255,255,.96);border-bottom:1px solid rgba(0,0,0,.06);box-shadow:0 1px 0 rgba(0,0,0,.04);transition:background-color .4s ease,border-color .3s,box-shadow .3s;}
[data-theme="dark"] nav{background:rgba(17,17,17,.96);border-bottom-color:rgba(255,255,255,.07);box-shadow:0 1px 0 rgba(0,0,0,.3);}
nav.scrolled{background:#ffffff;box-shadow:0 1px 20px rgba(0,0,0,.07);}
[data-theme="dark"] nav.scrolled{background:#111111;box-shadow:0 1px 20px rgba(0,0,0,.4);}
.nav-logo{color:var(--ink);text-decoration:none;margin-right:auto;display:flex;align-items:center;transition:opacity .2s;}
.nav-logo:hover{opacity:.7;}
[data-theme="dark"] .nav-logo img{filter:invert(1);}
.nav-links{display:flex;gap:3px;list-style:none;align-items:center;}
.nav-links a{font-family:var(--nav);font-size:13px;font-weight:400;color:var(--mid);text-decoration:none;letter-spacing:.01em;padding:6px 14px;border-radius:999px;border:1px solid transparent;transition:color .2s,border-color .2s;}
.nav-links a:hover{color:var(--ink);border-color:var(--warm);}
.nav-cta{font-family:var(--nav)!important;font-size:13px!important;font-weight:500!important;background:var(--ink)!important;color:var(--bg)!important;border-color:var(--ink)!important;}
.nav-cta:hover{background:transparent!important;color:var(--ink)!important;}

/* NAV — Case study variant (back button) */
.nav-back{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--mid);text-decoration:none;margin-right:auto;transition:color .2s;}
.nav-back:hover{color:var(--ink);}
.nav-back svg{transition:transform .2s;}
.nav-back:hover svg{transform:translateX(-3px);}


/* ============================================================
   HOMEPAGE — HERO
   ============================================================ */
.hero{position:relative;height:100vh;min-height:600px;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;background:var(--bg);}
#geo{position:absolute;inset:0;width:100%;height:100%;display:block;pointer-events:none;z-index:0;}
.hero-lockup{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center;gap:16px;mix-blend-mode:multiply;}
[data-theme="dark"] .hero-lockup{mix-blend-mode:normal;}
.hero-name{font-family:var(--serif);font-size:clamp(72px,14vw,200px);font-weight:300;color:var(--ink);line-height:.88;letter-spacing:-.04em;white-space:nowrap;opacity:0;animation:fadeUp 1.2s var(--ease) .2s forwards;}
.hero-name em{font-style:italic;}
.hero-tag{font-family:var(--mono);font-size:11px;color:var(--mid);letter-spacing:.14em;text-transform:uppercase;opacity:0;animation:fadeUp 1s var(--ease) .7s forwards;}
.hero-bot{position:absolute;bottom:0;left:0;right:0;z-index:3;display:flex;align-items:center;justify-content:space-between;padding:16px 48px 32px;border-top:1px solid var(--warm);background:var(--bg);opacity:0;animation:fadeIn 1s ease 1.1s forwards;transition:background-color .4s ease,border-color .4s ease;}
.hero-role{font-family:var(--mono);font-size:11px;color:var(--mid);letter-spacing:.09em;text-transform:uppercase;}
.hero-stats{display:flex;gap:40px;}
.stat-n{font-family:var(--serif);font-size:28px;font-weight:300;color:var(--ink);letter-spacing:-.02em;line-height:1;}
.stat-l{font-family:var(--mono);font-size:11px;color:var(--light);letter-spacing:.08em;text-transform:uppercase;margin-top:2px;}
.hero-scroll{font-family:var(--mono);font-size:12px;color:rgba(0,0,0,.55);letter-spacing:.12em;text-transform:uppercase;display:flex;align-items:center;gap:10px;}
[data-theme="dark"] .hero-scroll{color:rgba(255,255,255,.55);}
.scroll-ln{width:36px;height:1px;background:currentColor;}
.scroll-arrow{display:inline-flex;animation:scrollBounce 1.4s ease-in-out infinite;}
@keyframes scrollBounce{0%,100%{transform:translateY(0);}50%{transform:translateY(5px);}}


/* ============================================================
   HOMEPAGE — SHARED SECTION SHELL
   ============================================================ */
.sp{padding:96px 48px;background:var(--bg);color:var(--ink);}
#work,#about,#experience,#contact{scroll-margin-top:72px;}
.sh{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:52px;padding-bottom:16px;border-bottom:1px solid var(--warm);}
.sh-title{font-family:var(--serif);font-size:clamp(33px,4vw,48px);font-weight:300;letter-spacing:-.02em;color:var(--ink);}
.sh-count{font-family:var(--mono);font-size:11px;color:var(--light);letter-spacing:.06em;}


/* ============================================================
   HOMEPAGE — WORK GRID
   ============================================================ */
.wg{display:grid;grid-template-columns:1fr 1fr;gap:4px;}
.wi{position:relative;background:var(--ob);aspect-ratio:4/3;overflow:hidden;text-decoration:none;display:block;}
.wi:first-child{grid-column:1/-1;aspect-ratio:16/7;}
.wb{position:absolute;inset:0;transition:transform .8s var(--ease);}
.wi:hover .wb{transform:scale(1.04);}
.wi:nth-child(1) .wb{background:url('work/mint-mobile/mint-hero.jpg') center/cover no-repeat;}
.wi:nth-child(2) .wb{background:url('work/kia-build-and-price/kia-hero.jpg') center/cover no-repeat;}
.wi:nth-child(3) .wb{background:url('work/hyundai-design-system/hyundai-ds-hero.jpg') center/cover no-repeat;}
.wi:nth-child(4) .wb{background:url('work/lexus-model-page/lexus-hero.jpg') center/cover no-repeat;}
.wi:nth-child(5) .wb{background:url('work/sonic-challenge/sonic-hero.jpg') center/cover no-repeat;}
.wi:nth-child(6) .wb{background:url('work/korean-air/korean-air-hero.jpg') center/cover no-repeat;}
.wi:nth-child(7) .wb{background:url('work/virgin-america/virgin-hero.jpg') center/cover no-repeat;}
.wp{position:absolute;inset:0;opacity:.07;background-image:linear-gradient(rgba(255,255,255,.15) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.15) 1px,transparent 1px);background-size:40px 40px;}
.wo{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.95) 0%,rgba(0,0,0,.8) 50%,rgba(0,0,0,.4) 75%,transparent 85%);}
.wc{position:absolute;bottom:0;left:0;right:0;padding:40px;transform:translateY(8px);transition:transform .4s var(--ease);}
.wi:hover .wc{transform:translateY(0);}
.w-tag{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.4);display:block;margin-bottom:8px;}
.w-title{font-family:var(--serif);font-size:clamp(23px,2.8vw,40px);font-weight:300;color:#F5F5F5;line-height:1.2;margin-bottom:8px;}
.w-desc{font-size:13px;color:rgba(255,255,255,.45);line-height:1.6;max-width:480px;opacity:0;transform:translateY(8px);transition:opacity .35s var(--ease) .05s,transform .35s var(--ease) .05s;}
.wi:hover .w-desc{opacity:1;transform:translateY(0);}
.wa{position:absolute;top:24px;right:24px;width:32px;height:32px;border:1px solid rgba(255,255,255,.2);border-radius:50%;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.5);font-size:13px;opacity:0;transform:scale(.8);transition:opacity .3s,transform .3s var(--ease);}
.wi:hover .wa{opacity:1;transform:scale(1);}


/* ============================================================
   HOMEPAGE — WORK MODAL
   ============================================================ */
#modal{position:fixed;inset:0;z-index:500;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .35s var(--ease);}
#modal.open{opacity:1;pointer-events:auto;}
#modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);}
#modal-box{position:relative;z-index:1;background:#fff;width:min(720px,92vw);max-height:88vh;overflow-y:auto;border-radius:4px;transform:translateY(24px) scale(.97);box-shadow:0 24px 80px rgba(0,0,0,.3);-webkit-overflow-scrolling:touch;transition:transform .4s var(--ease);}
#modal.open #modal-box{transform:translateY(0) scale(1);}
[data-theme="dark"] #modal-box{background:#1a1a1a;}
#modal-close{position:sticky;top:0;z-index:10;display:flex;justify-content:flex-end;padding:12px 12px 0;margin-bottom:-48px;pointer-events:none;}
#modal-close button{width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.25);background:rgba(0,0,0,.4);color:#fff;font-size:20px;line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s;pointer-events:auto;}
#modal-close button:hover{background:rgba(0,0,0,.7);}
#modal-hero{position:relative;height:260px;overflow:hidden;}
#modal-hero-bg{position:absolute;inset:0;}
#modal-hero-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.85) 0%,rgba(0,0,0,.2) 100%);}
#modal-hero-content{position:absolute;bottom:0;left:0;right:0;padding:28px 32px;}
#modal-hero-content .m-tag{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.5);display:block;margin-bottom:10px;}
#modal-hero-content h2{font-family:var(--serif);font-size:clamp(23px,3vw,33px);font-weight:300;color:#fff;line-height:1.2;}
#modal-body{padding:28px 32px 32px;}
#modal-summary{font-size:16px;line-height:1.75;color:var(--mid);margin-bottom:28px;}
#modal-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:20px 0;border-top:1px solid var(--warm);border-bottom:1px solid var(--warm);margin-bottom:28px;}
.m-meta-label{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--light);margin-bottom:6px;}
.m-meta-value{font-family:var(--serif);font-size:19px;font-weight:400;color:var(--ink);}
#modal-cta{display:inline-flex;align-items:center;gap:8px;font-family:var(--nav);font-size:13px;font-weight:500;color:var(--bg);background:var(--ink);text-decoration:none;padding:12px 24px;border-radius:999px;border:1px solid var(--ink);transition:background .2s,color .2s;}
#modal-cta:hover{background:transparent;color:var(--ink);}


/* ============================================================
   HOMEPAGE — ABOUT
   ============================================================ */
.about-s{background:var(--ob);}
.ag{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;}
.a-img{aspect-ratio:3/4;background:linear-gradient(160deg,#1c1c1c,#282828);position:relative;overflow:hidden;}
.a-eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.28);margin-bottom:20px;}
.a-heading{font-family:var(--serif);font-size:clamp(33px,4vw,48px);font-weight:300;color:#F0EDE8;line-height:1.2;letter-spacing:-.02em;margin-bottom:24px;}
.a-heading em{font-style:italic;color:rgba(255,255,255,.5);}
.a-body{font-size:16px;font-weight:300;line-height:1.85;color:rgba(255,255,255,.4);margin-bottom:44px;}
.a-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding-top:36px;border-top:1px solid rgba(255,255,255,.08);}
.a-stat-n{font-family:var(--serif);font-size:48px;font-weight:300;color:#F0EDE8;line-height:1;margin-bottom:6px;}
.a-stat-l{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.28);}


/* ============================================================
   HOMEPAGE — EXPERIENCE
   ============================================================ */
.el{display:flex;flex-direction:column;}
.ei{display:grid;grid-template-columns:180px 1fr 140px;gap:40px;align-items:start;padding:32px 0;border-bottom:1px solid var(--warm);}
.e-dates{font-family:var(--mono);font-size:11px;color:var(--light);letter-spacing:.04em;padding-top:4px;}
.e-co{font-family:var(--serif);font-size:23px;font-weight:400;color:var(--ink);margin-bottom:4px;letter-spacing:-.01em;}
.e-role{font-size:13px;color:var(--mid);margin-bottom:12px;font-style:italic;}
.e-tag{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--light);text-align:right;padding-top:4px;}


/* ============================================================
   HOMEPAGE — CONTACT
   ============================================================ */
.contact-s{background:var(--ob);position:relative;overflow:hidden;}
.contact-s::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 70% 50%,rgba(200,184,154,.05) 0%,transparent 70%);pointer-events:none;}
.ci{position:relative;z-index:1;}
.c-ey{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.28);margin-bottom:24px;}
.c-hd{font-family:var(--serif);font-size:clamp(48px,7vw,80px);font-weight:300;color:#F0EDE8;line-height:.95;letter-spacing:-.03em;margin-bottom:44px;}
.c-hd em{font-style:italic;color:rgba(255,255,255,.45);}
.c-links{display:flex;gap:12px;flex-wrap:wrap;}
.pill{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:999px;font-family:var(--mono);font-size:11px;letter-spacing:.07em;text-transform:uppercase;text-decoration:none;border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.6);transition:border-color .2s,color .2s,background .2s;}
.pill:hover{border-color:rgba(255,255,255,.55);color:#fff;}
.pill-solid{background:#fff;border-color:#fff;color:#111;}
.pill-solid:hover{background:transparent;color:#fff;}


/* ============================================================
   HOMEPAGE — FOOTER + CURSOR
   ============================================================ */
footer{background:var(--ob);border-top:1px solid rgba(255,255,255,.06);padding:24px 48px;display:flex;justify-content:space-between;align-items:center;}
footer p{font-family:var(--mono);font-size:11px;color:rgba(255,255,255,.18);}

.cur-ring{display:none;}
@media(pointer:fine){
  body,a,button{cursor:none;}
  .cur-ring{display:flex;position:fixed;width:20px;height:20px;background:rgba(100,100,100,0.55);border-radius:50%;pointer-events:none;z-index:10001;left:-100px;top:-100px;transform:translate(-50%,-50%);mix-blend-mode:difference;transition:width .2s var(--ease),height .2s var(--ease),background .2s;}
  .cur-ring.big{width:36px;height:36px;background:rgba(100,100,100,0.4);}
}


/* ============================================================
   CASE STUDY — HERO
   ============================================================ */
.cs-hero{position:relative;height:100vh;min-height:600px;overflow:hidden;}
.cs-hero-img{position:absolute;inset:0;background-size:cover;background-position:center;}
.cs-hero-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.95) 0%,rgba(0,0,0,.85) 60%,rgba(0,0,0,.6) 80%,rgba(0,0,0,.2) 95%,transparent 100%);}
.cs-hero-content{position:absolute;bottom:0;left:0;right:0;padding:56px 48px;z-index:2;}
.cs-eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.7);margin-bottom:20px;}
.cs-title{font-family:var(--serif);font-size:clamp(48px,7vw,96px);font-weight:300;line-height:.92;letter-spacing:-.03em;color:#F0EDE8;margin-bottom:24px;}
.cs-title em{font-style:italic;color:rgba(255,255,255,.65);}
.cs-hero-summary{font-size:16px;line-height:1.8;color:rgba(255,255,255,.8);max-width:560px;margin-bottom:40px;}
.cs-hero-meta{display:flex;gap:40px;flex-wrap:wrap;padding-top:32px;border-top:1px solid rgba(255,255,255,.25);}
.cs-hero-meta-item{display:flex;flex-direction:column;gap:6px;}
.cs-hero-meta-item .cs-meta-label{color:rgba(255,255,255,.6);}
.cs-hero-meta-item .cs-meta-value{font-family:var(--serif);font-size:19px;font-weight:300;color:#F0EDE8;}
.cs-meta-label{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--light);}
.cs-meta-value{font-family:var(--serif);font-size:19px;font-weight:300;color:var(--ink);}


/* ============================================================
   CASE STUDY — BRIDGE BAR
   ============================================================ */
.cs-bridge{background:var(--ob);padding:40px 48px;border-bottom:1px solid rgba(255,255,255,.06);}
.cs-bridge-inner{max-width:1272px;margin:0 auto;display:flex;align-items:center;}
.cs-bridge-item{flex:1;padding:0 40px;}
.cs-bridge-item:first-child{padding-left:0;}
.cs-bridge-n{font-family:var(--serif);font-size:clamp(33px,4vw,48px);font-weight:300;color:#F0EDE8;line-height:1;letter-spacing:-.02em;margin-bottom:6px;}
.cs-bridge-l{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.4);}
.cs-bridge-div{width:1px;height:48px;background:rgba(255,255,255,.1);flex-shrink:0;}


/* ============================================================
   CASE STUDY — BODY LAYOUT
   ============================================================ */
.cs-body{display:grid;grid-template-columns:160px 1fr;gap:0;max-width:1400px;margin:0 auto;padding:0 64px;background:var(--bg);}
.cs-sidebar{padding:64px 0 0 0;position:sticky;top:88px;height:fit-content;align-self:start;background:var(--bg);}
.cs-sidebar-links{list-style:none;display:flex;flex-direction:column;}
.cs-sidebar-links a{font-family:var(--nav);font-size:13px;color:var(--light);text-decoration:none;padding:8px 0 8px 10px;display:block;transition:color .2s,border-left-color .2s;border-left:2px solid transparent;margin-left:-2px;}
.cs-sidebar-links a:hover{color:var(--mid);border-left-color:var(--warm);}
.cs-sidebar-links a.active{color:var(--ink);border-left-color:var(--ink);}
.cs-content{padding:64px 0 64px 64px;background:var(--bg);}
.cs-section{margin-bottom:72px;background:var(--bg);scroll-margin-top:96px;}
.cs-section:last-child{margin-bottom:0;}
.cs-section-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--light);margin-bottom:12px;}
.cs-section-title{font-family:var(--serif);font-size:clamp(28px,3vw,40px);font-weight:300;letter-spacing:-.02em;color:var(--ink);margin-bottom:20px;line-height:1.1;}
.cs-section-title em{font-style:italic;}
.cs-body-text{font-size:16px;line-height:1.8;color:var(--mid);margin-bottom:16px;}
.cs-body-text:last-child{margin-bottom:0;}
.cs-body-text strong{color:var(--ink);font-weight:500;}


/* ============================================================
   CASE STUDY — COMPONENTS
   ============================================================ */
.cs-overview-meta{display:flex;gap:0;margin:24px 0;}
.cs-overview-meta-item{flex:1;padding:20px;background:var(--bg);border:1px solid var(--warm);margin-left:-1px;}
.cs-overview-meta-item:first-child{margin-left:0;}
.cs-overview-meta-item .cs-meta-label{display:block;margin-bottom:8px;}
.cs-overview-meta-item .cs-meta-value{font-family:var(--serif);font-size:19px;font-weight:300;color:var(--ink);}

.cs-process{display:flex;flex-direction:column;margin:20px 0;}
.cs-step{display:grid;grid-template-columns:32px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--warm);align-items:start;background:var(--bg);}
.cs-step:first-child{border-top:1px solid var(--warm);}
.cs-step-num{font-family:var(--serif);font-size:23px;font-weight:300;color:var(--light);line-height:1;}
.cs-step-title{font-family:var(--sans);font-size:16px;font-weight:500;color:var(--ink);margin-bottom:4px;}
.cs-step-desc{font-size:13px;line-height:1.65;color:var(--mid);}

.cs-findings{display:grid;grid-template-columns:1fr 1fr;gap:0;margin:20px 0;}
.cs-finding{background:var(--bg);padding:24px;border:1px solid var(--warm);margin:-1px 0 0 -1px;border-left:2px solid var(--warm);}
.cs-finding.accent{border-left-color:var(--accent);}
.cs-finding-title{font-family:var(--serif);font-size:16px;font-weight:400;color:var(--ink);margin-bottom:6px;}
.cs-finding-desc{font-size:13px;line-height:1.65;color:var(--mid);}

.cs-outcomes{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:24px 0;}
.cs-outcome{padding:28px;background:var(--bg);border:1px solid var(--warm);margin:-1px 0 0 -1px;}
.cs-outcome-n{font-family:var(--serif);font-size:40px;font-weight:300;color:var(--ink);line-height:1;margin-bottom:6px;letter-spacing:-.02em;}
.cs-outcome-l{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--light);}

.cs-img{background:var(--warm);display:flex;align-items:center;justify-content:center;margin:24px 0;cursor:zoom-in;overflow:hidden;border-radius:2px;position:relative;}
.cs-img img{width:100%;height:auto;object-fit:unset;display:block;}
.cs-img-label{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--light);}


/* ============================================================
   CASE STUDY — CAROUSEL
   ============================================================ */
.cs-carousel{position:relative;margin:24px 0;}
.cs-carousel-wrap{overflow:hidden;border-radius:2px;}
.cs-carousel-track{display:flex;transition:transform .5s var(--ease);will-change:transform;}
.cs-carousel-slide{flex:0 0 100%;position:relative;background:var(--warm);display:flex;align-items:center;justify-content:center;cursor:zoom-in;}
.cs-carousel-slide img{width:100%;height:auto;display:block;pointer-events:none;}
.cs-carousel-btn{position:absolute;top:50%;transform:translateY(-50%);z-index:4;width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:rgba(0,0,0,.5);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s;backdrop-filter:blur(4px);}
.cs-carousel-btn:hover{background:rgba(0,0,0,.75);}
.cs-carousel-btn.prev{left:12px;}
.cs-carousel-btn.next{right:12px;}
.cs-carousel-counter{position:absolute;top:12px;right:12px;font-family:var(--mono);font-size:11px;color:rgba(255,255,255,.65);background:rgba(0,0,0,.4);padding:3px 10px;border-radius:999px;backdrop-filter:blur(4px);z-index:4;}
.cs-carousel-dots{display:flex;justify-content:center;gap:6px;margin-top:12px;}
.cs-carousel-dot{width:6px;height:6px;border-radius:50%;background:var(--warm);border:none;cursor:pointer;padding:0;transition:background .2s,transform .2s;}
.cs-carousel-dot.active{background:var(--ink);transform:scale(1.3);}


/* ============================================================
   CASE STUDY — LIGHTBOX
   ============================================================ */
#lightbox{position:fixed;inset:0;z-index:600;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s var(--ease);}
#lightbox.open{opacity:1;pointer-events:auto;}
#lightbox-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);}
#lightbox-content{position:relative;z-index:1;}
#lightbox-content img{max-width:92vw;max-height:88vh;object-fit:contain;display:block;border-radius:2px;transform:scale(.96);transition:transform .35s var(--ease);}
#lightbox.open #lightbox-content img{transform:scale(1);}
#lightbox-close{position:fixed;top:24px;right:24px;z-index:2;width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);color:#fff;font-size:19px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s;}
#lightbox-close:hover{background:rgba(255,255,255,.18);}
#lightbox-caption{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.4);z-index:2;white-space:nowrap;}


/* ============================================================
   CASE STUDY — NEXT PROJECT
   ============================================================ */
.cs-next{padding:64px 48px;border-top:1px solid var(--warm);display:flex;flex-direction:column;align-items:flex-start;gap:24px;background:var(--bg);}
.cs-next-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--light);margin-bottom:10px;}
.cs-next-title{font-family:var(--serif);font-size:clamp(23px,3vw,33px);font-weight:300;color:var(--ink);letter-spacing:-.02em;}
.cs-next-link{display:inline-flex;align-items:center;gap:8px;font-family:var(--nav);font-size:13px;font-weight:500;color:var(--bg);background:var(--ink);text-decoration:none;padding:12px 24px;border-radius:999px;border:1px solid var(--ink);transition:background .2s,color .2s;}
.cs-next-link:hover{background:transparent;color:var(--ink);}


/* ============================================================
   RESUME
   ============================================================ */
.resume-close{position:fixed;top:24px;right:24px;z-index:200;width:40px;height:40px;border-radius:50%;border:1px solid var(--warm);background:var(--bg);color:var(--mid);font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;text-decoration:none;transition:border-color .2s,color .2s,transform .2s;}
.resume-close:hover{border-color:var(--ink);color:var(--ink);transform:scale(1.08);}
.resume-header{padding:80px 64px 48px;border-bottom:1px solid var(--warm);max-width:1400px;margin:0 auto;}
.header-top{display:grid;grid-template-columns:auto 1fr;gap:0 64px;align-items:end;}
.header-name{font-family:var(--serif);font-size:clamp(64px,9vw,120px);font-weight:300;color:var(--ink);line-height:.88;letter-spacing:-.04em;white-space:nowrap;}
.header-name em{font-style:italic;}
.header-right{display:flex;flex-direction:column;justify-content:flex-end;gap:20px;padding-bottom:4px;}
.header-tagline{font-family:var(--sans);font-size:16px;font-weight:300;color:var(--mid);line-height:1.8;max-width:480px;}
.header-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.btn-pill{display:inline-flex;align-items:center;gap:7px;font-family:var(--nav);font-size:11px;font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);text-decoration:none;border:1px solid var(--warm);padding:10px 20px;border-radius:999px;background:transparent;transition:background .2s,color .2s,border-color .2s;cursor:pointer;}
.btn-pill:hover{background:var(--ink);color:var(--bg);border-color:var(--ink);}
.btn-pill svg{flex-shrink:0;}
.btn-pill-solid{background:var(--ink);color:var(--bg);border-color:var(--ink);}
.btn-pill-solid:hover{background:transparent;color:var(--ink);}
.resume-body{max-width:1400px;margin:0 auto;padding:48px 64px 80px;display:grid;grid-template-columns:280px 1fr;gap:0 80px;}
.col-block{margin-bottom:48px;}
.col-title{font-family:var(--serif);font-size:28px;font-weight:300;color:var(--ink);letter-spacing:-.02em;margin-bottom:20px;}
.edu-entry{margin-bottom:16px;}
.edu-degree{font-size:16px;font-weight:500;color:var(--ink);margin-bottom:3px;}
.edu-school{font-size:13px;color:var(--mid);}
.skill-group{margin-bottom:20px;}
.skill-group-label{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--light);margin-bottom:8px;}
.tags{display:flex;flex-wrap:wrap;gap:5px;}
.tag{font-family:var(--mono);font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink);background:var(--warm);padding:6px 12px;border-radius:999px;}
.teaching-role{font-size:16px;font-weight:500;color:var(--ink);margin-bottom:3px;}
.teaching-place{font-size:13px;color:var(--mid);margin-bottom:3px;}
.teaching-dates{font-family:var(--mono);font-size:11px;color:var(--light);margin-bottom:10px;letter-spacing:.03em;}
.teaching-note{font-size:16px;color:var(--mid);line-height:1.7;}
.exp-entry{padding:28px 0;border-bottom:1px solid var(--warm);}
.exp-entry:first-child{border-top:1px solid var(--warm);}
.exp-top{display:grid;grid-template-columns:44px 1fr auto;gap:0 16px;align-items:start;margin-bottom:16px;}
.exp-logo{width:36px;height:36px;border-radius:6px;overflow:hidden;flex-shrink:0;background:var(--warm);display:flex;align-items:center;justify-content:center;}
.exp-logo img{width:100%;height:100%;object-fit:contain;display:block;}
.exp-role{font-family:var(--serif);font-size:19px;font-weight:400;color:var(--ink);letter-spacing:-.01em;margin-bottom:3px;}
.exp-company{font-size:14px;color:var(--mid);}
.exp-company-name{font-weight:500;}
.exp-sep{margin:0 6px;color:var(--light);}
.exp-dates{font-family:var(--mono);font-size:11px;color:var(--light);letter-spacing:.03em;padding-top:4px;white-space:nowrap;}
.exp-bullets{list-style:none;display:flex;flex-direction:column;gap:8px;}
.exp-bullets li{font-size:16px;line-height:1.75;color:var(--mid);padding-left:16px;position:relative;}
.exp-bullets li::before{content:'';position:absolute;left:0;top:10px;width:4px;height:4px;border-radius:50%;background:var(--warm);}

/* Resume download toggle */
.dl-toggle-outer{position:relative;display:inline-flex;flex-direction:column;}
.dl-toggle-wrap{display:inline-flex;align-items:stretch;border-radius:999px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);overflow:hidden;transition:background .2s,color .2s;cursor:pointer;}
.dl-toggle-wrap:hover{background:transparent;color:var(--ink);}
.dl-main{border-radius:0!important;border:none!important;background:transparent!important;color:inherit!important;gap:7px;padding-right:14px!important;transition:none!important;white-space:nowrap;}
.dl-main.btn-pill,.dl-main.btn-pill-solid,.dl-main.btn-pill:hover,.dl-main.btn-pill-solid:hover{background:transparent!important;color:inherit!important;border-color:transparent!important;transition:none!important;}
.dl-format-btn{background:transparent;color:inherit;border:none!important;border-left:1px solid rgba(255,255,255,.3)!important;padding:0 13px!important;min-width:0;cursor:pointer;display:flex;align-items:center;transition:border-color .2s;}
.dl-toggle-wrap:hover .dl-format-btn{border-left-color:rgba(0,0,0,.15)!important;}
[data-theme="dark"] .dl-format-btn{border-left-color:rgba(255,255,255,.18)!important;}
[data-theme="dark"] .dl-toggle-wrap:hover .dl-format-btn{border-left-color:rgba(255,255,255,.2)!important;}
.dl-dropdown{position:absolute;top:calc(100% + 8px);left:0;min-width:148px;background:var(--bg);border:1px solid var(--warm);border-radius:12px;box-shadow:0 8px 28px rgba(0,0,0,.12);overflow:hidden;z-index:300;animation:dl-fade .15s var(--ease);}
[data-theme="dark"] .dl-dropdown{box-shadow:0 8px 28px rgba(0,0,0,.4);}
@keyframes dl-fade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}


/* ============================================================
   ANIMATIONS & SCROLL REVEAL
   ============================================================ */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px);}to{opacity:1;transform:translateY(0);}}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}
.rev{opacity:0;transform:translateY(16px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.rev.vis{opacity:1;transform:translateY(0);}
.js-on .rev{opacity:0;transform:translateY(20px);}
.js-on .rev.vis{opacity:1;transform:translateY(0);}
.d1{transition-delay:.1s;}
.d2{transition-delay:.2s;}
.d3{transition-delay:.3s;}


/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:900px){
  /* Nav */
  nav{padding:12px 20px;}
  .nav-links a{padding:6px 10px;}
  /* Homepage hero */
  .hero-bot{padding:12px 20px 24px;flex-wrap:wrap;gap:10px;}
  .hero-role{display:none;}
  /* Sections */
  .sp{padding:64px 20px;}
  /* Work grid */
  .wg{grid-template-columns:1fr;}
  .wi:first-child{aspect-ratio:4/3;}
  /* About */
  .ag{grid-template-columns:1fr;gap:40px;}
  .a-img{display:none;}
  /* Experience */
  .ei{grid-template-columns:1fr;gap:4px;}
  .e-tag{display:none;}
  /* Contact */
  .contact-grid{grid-template-columns:1fr !important;gap:40px !important;}
  .contact-form-row{grid-template-columns:1fr !important;}
  .ci{flex-direction:column !important;}
  .ci > div{width:100% !important;}
  .ci form{width:100% !important;}
  /* Footer */
  footer{padding:20px;flex-direction:column;gap:10px;text-align:center;}
  /* Modal */
  #modal-meta{grid-template-columns:1fr 1fr;}
  #modal{align-items:flex-end;}
  #modal-box{width:100vw;max-height:92dvh;max-height:92vh;border-radius:12px 12px 0 0;margin:0;}
  #modal-close button{width:44px;height:44px;font-size:22px;background:rgba(0,0,0,.5);border-color:rgba(255,255,255,.3);}
  /* Case study */
  .cs-bridge{padding:32px 20px;}
  .cs-bridge-item{padding:0 20px;}
  .cs-bridge-n{font-size:28px;}
  .cs-hero-content{padding:40px 20px;}
  .cs-hero-meta{gap:24px;}
  .cs-body{grid-template-columns:1fr;padding:0 20px;}
  .cs-sidebar{display:none;}
  .cs-content{padding:48px 0;border-left:none;}
  .cs-findings{grid-template-columns:1fr;}
  .cs-outcomes{grid-template-columns:1fr 1fr;}
  .cs-overview-meta{flex-direction:column;}
  .cs-next{padding:48px 20px;flex-direction:column;gap:24px;align-items:flex-start;}
  /* Resume */
  .resume-header{padding:64px 24px 40px;}
  .header-top{grid-template-columns:1fr;gap:24px;}
  .header-name{font-size:clamp(48px,12vw,80px);white-space:normal;}
  .resume-body{grid-template-columns:1fr;padding:32px 24px 64px;}
  .resume-close{top:16px;right:16px;}
}
@media(max-width:600px){
  .hero-name{font-size:clamp(48px,16vw,88px);white-space:normal;text-align:center;}
  .hero-stats{gap:16px;}
  .stat-n{font-size:23px;}
  .nav-cta{display:none;}
  .cs-outcomes{grid-template-columns:1fr;}
  .exp-top{grid-template-columns:44px 1fr;gap:0 12px;}
  .exp-dates{grid-column:2/3;padding-top:2px;font-size:10px;}
}
@media(max-width:480px){
  .hero-scroll{display:none;}
  .resume-header{padding:48px 16px 32px;}
  .resume-body{padding:24px 16px 48px;}
}

/* RESUME — download dropdown options */
.dl-option{display:block;width:100%;padding:10px 16px;font-family:var(--nav);font-size:11px;font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);background:transparent;border:none;text-align:left;cursor:pointer;transition:background .15s;}
.dl-option:hover{background:var(--warm);}
.dl-option.active{color:var(--ink);font-weight:700;}