/* ============================================================
   MUHSIN.DEV — dark terminal-style portfolio
   Palette derived from the MUHSIN logo (teal / cyan)
   ============================================================ */
:root{
  --bg:#0a1012;
  --bg-2:#0d1517;
  --surface:#111a1d;
  --surface-2:#152023;
  --line:rgba(79,194,217,.14);
  --line-strong:rgba(79,194,217,.35);
  --teal:#2f96ab;
  --teal-bright:#4fc2d9;
  --teal-dim:#1c7c8d;
  --teal-deep:#0f4a58;
  --text:#e7f4f5;
  --text-soft:#9fbcc0;
  --text-mute:#5d787c;
  --amber:#e3ac63;
  --radius:10px;
  --radius-lg:16px;
  --maxw:1180px;
  --ff-mono:'JetBrains Mono', 'Space Mono', monospace;
  --ff-display:'Sora','Segoe UI',sans-serif;
  --ff-body:'Inter','Segoe UI',sans-serif;
  --glow:0 0 0 1px var(--line), 0 20px 50px -20px rgba(47,150,171,.35);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--ff-body);line-height:1.65;-webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(700px 400px at 85% -10%, rgba(47,150,171,.16), transparent 60%),
    radial-gradient(500px 300px at -5% 20%, rgba(79,194,217,.09), transparent 60%);
  background-attachment:fixed;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{font-family:var(--ff-display);color:#fff;line-height:1.15;margin:0 0 .5em;font-weight:700;}
p{margin:0 0 1em;color:var(--text-soft);}
:focus-visible{outline:2px solid var(--teal-bright);outline-offset:3px;}
code,.mono{font-family:var(--ff-mono);}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:110px 0;border-bottom:1px solid var(--line);}
.section:last-of-type{border-bottom:none;}

.tag{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--ff-mono);font-size:.78rem;
  color:var(--teal-bright);letter-spacing:.04em;margin-bottom:18px;
}
.tag .idx{color:var(--text-mute);}
.tag::before{content:"//";color:var(--teal-dim);}

.section-head{max-width:640px;margin-bottom:52px;}
.section-head h2{font-size:clamp(1.6rem,3.2vw,2.4rem);}
.section-head p{font-size:1.02rem;}

/* Cursor blink, tying to the logo's cursor icon */
.caret{display:inline-block;width:.55em;height:1em;background:var(--teal-bright);margin-left:4px;vertical-align:-.15em;animation:blink 1s steps(1) infinite;}
@keyframes blink{50%{opacity:0;}}
@media (prefers-reduced-motion:reduce){.caret{animation:none;}}

/* Buttons ------------------------------------------------------*/
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:14px 28px;border-radius:var(--radius);
  font-family:var(--ff-mono);font-weight:600;font-size:.88rem;letter-spacing:.02em;cursor:pointer;
  border:1px solid transparent;transition:.2s ease;
}
.btn-primary{background:var(--teal);color:#03181c;box-shadow:0 10px 30px -12px rgba(47,150,171,.6);}
.btn-primary:hover{background:var(--teal-bright);transform:translateY(-2px);}
.btn-outline{border-color:var(--line-strong);color:var(--text);}
.btn-outline:hover{border-color:var(--teal-bright);color:var(--teal-bright);transform:translateY(-2px);}
.btn .arrow{transition:transform .2s ease;}
.btn:hover .arrow{transform:translate(3px,-3px);}

/* Boot overlay ---------------------------------------------------*/
#boot{
  position:fixed;inset:0;background:var(--bg);z-index:999;display:flex;align-items:center;justify-content:center;
  font-family:var(--ff-mono);color:var(--teal-bright);font-size:.95rem;transition:opacity .5s ease, visibility .5s ease;
}
#boot.hide{opacity:0;visibility:hidden;}
#boot .boot-line{opacity:.85;}
#boot .caret{margin-left:2px;}
@media (prefers-reduced-motion:reduce){#boot{display:none;}}

/* Header --------------------------------------------------------*/
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(10,16,18,.78);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:var(--maxw);margin:0 auto;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--ff-mono);font-weight:700;font-size:1.05rem;color:#fff;}
.brand img{width:30px;height:auto;}
.brand .dot{color:var(--teal-bright);}

.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px;}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;margin:5px 0;}

.main-nav ul{display:flex;gap:4px;align-items:center;}
.main-nav a{
  padding:9px 14px;border-radius:999px;font-family:var(--ff-mono);font-size:.82rem;letter-spacing:.03em;
  color:var(--text-soft);transition:.18s;
}
.main-nav a:hover,.main-nav a.is-active{color:var(--teal-bright);background:rgba(47,150,171,.1);}

/* Hero ------------------------------------------------------------*/
.hero{padding:90px 0 100px;position:relative;}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center;}
.hero-role{font-family:var(--ff-mono);color:var(--teal-bright);font-size:.9rem;margin-bottom:18px;letter-spacing:.03em;}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.5rem);letter-spacing:-.01em;margin-bottom:.3em;}
.hero h1 .accent{color:var(--teal-bright);}
.hero-lede{font-size:1.08rem;max-width:54ch;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-stats{display:flex;gap:30px;margin-top:50px;flex-wrap:wrap;font-family:var(--ff-mono);}
.hero-stats div strong{display:block;font-size:1.5rem;color:#fff;}
.hero-stats div strong .accent{color:var(--teal-bright);}
.hero-stats div span{font-size:.72rem;color:var(--text-mute);text-transform:uppercase;letter-spacing:.06em;}

.hero-card{
  position:relative;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line-strong);
  box-shadow:var(--glow);overflow:hidden;
}
.hero-card-top{display:flex;gap:8px;padding:14px 16px;border-bottom:1px solid var(--line);}
.hero-card-top span{width:10px;height:10px;border-radius:50%;background:var(--text-mute);opacity:.5;}
.hero-photo{aspect-ratio:1/1;overflow:hidden;}
.hero-photo img{width:100%;height:100%;object-fit:cover;filter:grayscale(.15) contrast(1.05);}
.hero-card-bottom{padding:16px 18px;font-family:var(--ff-mono);font-size:.78rem;color:var(--text-soft);display:flex;justify-content:space-between;border-top:1px solid var(--line);}
.hero-card-bottom .status{color:var(--teal-bright);}

/* Grids / cards ------------------------------------------------------*/
.grid{display:grid;gap:24px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;
  transition:.2s ease;
}
.panel:hover{border-color:var(--line-strong);transform:translateY(-4px);}
.panel h3{font-size:1.1rem;}
.panel p{font-size:.92rem;}

/* About section -------------------------------------------------------*/
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;}
.info-list .row{display:flex;gap:14px;padding:12px 0;border-bottom:1px solid var(--line);font-family:var(--ff-mono);font-size:.86rem;}
.info-list .row .k{color:var(--teal-bright);min-width:100px;}
.info-list .row .v{color:var(--text-soft);}
.info-list .row:last-child{border-bottom:none;}

.timeline{position:relative;padding-left:26px;border-left:1px solid var(--line-strong);margin-top:30px;}
.t-item{position:relative;padding-bottom:32px;}
.t-item:last-child{padding-bottom:0;}
.t-item::before{content:"";position:absolute;left:-31px;top:4px;width:10px;height:10px;border-radius:50%;background:var(--teal-bright);box-shadow:0 0 0 4px rgba(79,194,217,.15);}
.t-item .yr{font-family:var(--ff-mono);color:var(--teal-bright);font-size:.78rem;}
.t-item h4{font-size:1rem;margin:.3em 0 .15em;}
.t-item .org{color:var(--text-mute);font-size:.85rem;}

/* Skills -----------------------------------------------------------*/
.skill-group h4{font-family:var(--ff-mono);text-transform:uppercase;letter-spacing:.08em;font-size:.78rem;color:var(--teal-bright);margin-bottom:14px;}
.skill-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.skill-tags span{
  font-family:var(--ff-mono);font-size:.76rem;color:var(--text-soft);border:1px solid var(--line);
  padding:6px 12px;border-radius:999px;
}
.skill-bar{margin-bottom:14px;}
.skill-bar .lbl{display:flex;justify-content:space-between;font-family:var(--ff-mono);font-size:.8rem;color:var(--text-soft);margin-bottom:6px;}
.skill-bar .track{height:6px;background:var(--surface-2);border-radius:999px;overflow:hidden;}
.skill-bar .fill{height:100%;background:linear-gradient(90deg,var(--teal-deep),var(--teal-bright));width:0;border-radius:999px;transition:width 1.1s ease;}

/* Projects ---------------------------------------------------------*/
.proj-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;display:flex;flex-direction:column;height:100%;transition:.2s ease;}
.proj-card:hover{border-color:var(--line-strong);transform:translateY(-5px);}
.proj-id{font-family:var(--ff-mono);color:var(--text-mute);font-size:.76rem;margin-bottom:10px;}
.proj-card h3{font-size:1.08rem;}
.proj-card p{font-size:.9rem;flex:1;}
.proj-tags{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0;}
.proj-tags span{font-family:var(--ff-mono);font-size:.72rem;color:var(--teal-bright);border:1px solid var(--line-strong);padding:4px 10px;border-radius:6px;}
.proj-links{display:flex;gap:16px;margin-top:auto;padding-top:6px;}
.proj-links a{font-family:var(--ff-mono);font-size:.82rem;color:var(--text);border-bottom:1px solid var(--line-strong);}
.proj-links a:hover{color:var(--teal-bright);border-color:var(--teal-bright);}

/* Portfolio page tabs (reused) --------------------------------------*/
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:40px;}
.tab-btn{
  border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:10px 20px;
  font-family:var(--ff-mono);font-size:.82rem;color:var(--text-soft);cursor:pointer;transition:.18s;
}
.tab-btn.is-active,.tab-btn:hover{background:var(--teal);color:#03181c;border-color:var(--teal);}
.tab-panel{display:none;}
.tab-panel.is-active{display:grid;}

/* Status panel -------------------------------------------------------*/
.status-panel{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius-lg);padding:30px;font-family:var(--ff-mono);}
.status-panel .row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px dashed var(--line);font-size:.85rem;}
.status-panel .row:last-child{border-bottom:none;}
.status-panel .k{color:var(--text-mute);text-transform:uppercase;font-size:.72rem;letter-spacing:.06em;}
.status-panel .v{color:var(--text);}
.status-panel .v.online{color:var(--teal-bright);}
.status-panel .v.online::before{content:"●";margin-right:6px;font-size:.7em;}

/* Contact -----------------------------------------------------------*/
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;}
.contact-list .row{display:flex;align-items:center;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);}
.contact-list .row:last-child{border-bottom:none;}
.contact-list .ic{width:38px;height:38px;border-radius:10px;background:var(--surface-2);color:var(--teal-bright);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-family:var(--ff-mono);}
.contact-list .k{font-family:var(--ff-mono);font-size:.72rem;color:var(--text-mute);text-transform:uppercase;letter-spacing:.06em;display:block;margin-bottom:2px;}
.contact-list a,.contact-list .v{font-weight:600;color:var(--text);}
.contact-list a:hover{color:var(--teal-bright);}

.form-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field.full{grid-column:1/-1;}
.field label{font-family:var(--ff-mono);font-size:.76rem;color:var(--teal-bright);text-transform:uppercase;letter-spacing:.05em;}
.field input,.field textarea{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;
  color:var(--text);font-family:var(--ff-body);font-size:.94rem;
}
.field input:focus,.field textarea:focus{border-color:var(--teal-bright);outline:none;}
.form-note{font-size:.78rem;color:var(--text-mute);margin-top:14px;font-family:var(--ff-mono);}

/* Footer --------------------------------------------------------------*/
.site-footer{padding:40px 0;border-top:1px solid var(--line);}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;}
.footer-brand{font-family:var(--ff-mono);font-weight:700;color:#fff;display:flex;align-items:center;gap:8px;}
.footer-brand img{width:24px;}
.footer-copy{font-family:var(--ff-mono);font-size:.78rem;color:var(--text-mute);}
.footer-social{display:flex;gap:10px;}
.footer-social a{width:36px;height:36px;border-radius:50%;background:var(--surface);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-family:var(--ff-mono);font-size:.75rem;color:var(--text-soft);transition:.18s;}
.footer-social a:hover{color:var(--teal-bright);border-color:var(--teal-bright);}
.footer-social a svg,.contact-list .ic svg{display:block;}

/* Page hero (portfolio.html) -------------------------------------------*/
.page-hero{padding:64px 0 40px;}
.breadcrumb{font-family:var(--ff-mono);font-size:.82rem;color:var(--text-mute);}
.breadcrumb a{color:var(--teal-bright);}
.page-hero h1{font-size:clamp(1.9rem,4vw,2.6rem);}

/* CTA banner -------------------------------------------------------------*/
.cta-banner{
  background:linear-gradient(135deg,var(--surface),var(--surface-2));border:1px solid var(--line-strong);border-radius:var(--radius-lg);
  padding:56px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;
}
.cta-banner h2{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:.25em;}
.cta-banner p{margin-bottom:0;}

/* Utility ------------------------------------------------------------*/
.mt-0{margin-top:0;}

.proof-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;height:100%;transition:.2s ease;}
.proof-card:hover{border-color:var(--line-strong);transform:translateY(-5px);}
.proof-shot{display:block;background:var(--surface-2);border-bottom:1px solid var(--line);}
.proof-shot img{display:block;width:100%;height:190px;object-fit:cover;object-position:top;transition:.25s ease;}
.proof-shot:hover img{transform:scale(1.04);}
.proof-body{padding:18px 20px 22px;flex:1;display:flex;flex-direction:column;}
.proof-body h3{font-size:1rem;margin-bottom:4px;}
.proof-body .proof-metric{font-family:var(--ff-mono);color:var(--teal-bright);font-size:.82rem;margin-bottom:8px;}
.proof-body p{font-size:.85rem;flex:1;margin-bottom:0;}

/* ============================================================
   Screenshot lightbox
   ============================================================ */
.lightbox{
  position:fixed;inset:0;background:rgba(6,10,11,.92);z-index:999;
  display:flex;align-items:center;justify-content:center;padding:60px 24px;
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;
}
.lightbox.is-open{opacity:1;visibility:visible;}
.lightbox img{max-width:100%;max-height:100%;border-radius:var(--radius);box-shadow:0 25px 70px -20px rgba(0,0,0,.7);display:block;}
.lightbox-close{
  position:fixed;top:18px;right:18px;width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:1px solid var(--line-strong);color:var(--text);
  font-size:1.7rem;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:.18s ease;z-index:1000;
}
.lightbox-close:hover{color:var(--teal-bright);border-color:var(--teal-bright);transform:scale(1.05);}


/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;}
  .hero-card{max-width:380px;margin:0 auto;}
  .about-grid{grid-template-columns:1fr;gap:36px;}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}
  .contact-grid{grid-template-columns:1fr;}
}
@media (max-width:760px){
  .main-nav{
    position:fixed;inset:64px 16px auto 16px;background:var(--surface);border:1px solid var(--line-strong);
    border-radius:var(--radius-lg);padding:14px;transform:translateY(-12px);opacity:0;pointer-events:none;transition:.2s ease;
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;pointer-events:auto;}
  .main-nav ul{flex-direction:column;align-items:stretch;}
  .main-nav a{display:block;padding:12px 14px;}
  .nav-toggle{display:block;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .section{padding:70px 0;}
  .cta-banner{flex-direction:column;text-align:center;padding:40px 26px;}
}