/* =========================================================
   Dr. Santosh Gautam — Portfolio
   Design language: "the clinical chart"
   A physician's dossier — vitals, notes, and a steady pulse.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* ---- palette ---- */
  --paper:      #F3F6F5;   /* clinical wall / chart paper, cool not warm */
  --paper-dim:  #E7ECEA;
  --ink:        #12211F;   /* deep teal-black, scrub-green undertone */
  --ink-soft:   #46605C;
  --teal:       #1F6F63;   /* primary accent — trust, competence */
  --teal-deep:  #164F46;
  --pulse:      #D8483F;   /* ECG trace red — used sparingly */
  --mist:       #DCE6E3;   /* card surfaces */
  --gold:       #A9823F;   /* recognition / honors */
  --white:      #FFFFFF;

  --font-display: 'Fraunces', serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --max-w: 1160px;
  --radius: 14px;
  --ease: cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }

.wrap{ max-width:var(--max-w); margin:0 auto; padding:0 32px; }

::selection{ background:var(--teal); color:var(--white); }

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--pulse);
  outline-offset:3px;
}

/* ---------------------------------------------------------
   Pulse scroll indicator — the signature element.
   An ECG trace that fills as the page is read.
   --------------------------------------------------------- */
.pulse-bar{
  position:fixed; top:0; left:0; width:100%; height:3px;
  background:var(--paper-dim); z-index:1000;
}
.pulse-bar__fill{
  height:100%; width:0%;
  background:linear-gradient(90deg, var(--teal), var(--pulse));
  transition:width .12s linear;
}

/* ---------------------------------------------------------
   Nav
   --------------------------------------------------------- */
header.site-nav{
  position:fixed; top:0; left:0; width:100%; z-index:900;
  background:rgba(243,246,245,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(18,33,31,.08);
  padding-top:3px; /* room for pulse bar */
}
.nav-inner{
  max-width:var(--max-w); margin:0 auto; padding:16px 32px;
  display:flex; align-items:center; justify-content:space-between;
}
.nav-mark{
  font-family:var(--font-display); font-weight:600; font-size:1.15rem;
  display:flex; align-items:baseline; gap:8px;
}
.nav-mark small{
  font-family:var(--font-mono); font-size:.65rem; letter-spacing:.12em;
  color:var(--teal); font-weight:500;
}
.nav-links{ display:flex; gap:34px; align-items:center; }
.nav-links a{
  font-family:var(--font-mono); font-size:.78rem; letter-spacing:.06em;
  text-transform:uppercase; color:var(--ink-soft);
  position:relative; padding:4px 0;
  transition:color .25s var(--ease);
}
.nav-links a::after{
  content:''; position:absolute; left:0; bottom:-2px; width:0; height:1.5px;
  background:var(--pulse); transition:width .3s var(--ease);
}
.nav-links a:hover, .nav-links a.active{ color:var(--ink); }
.nav-links a:hover::after, .nav-links a.active::after{ width:100%; }

.nav-cta{
  font-family:var(--font-mono); font-size:.75rem; letter-spacing:.05em;
  border:1px solid var(--ink); padding:9px 18px; border-radius:100px;
  transition:all .3s var(--ease);
}
.nav-cta:hover{ background:var(--ink); color:var(--paper); }

.hamburger{
  display:none; flex-direction:column; gap:5px; background:none; border:none;
  cursor:pointer; padding:6px; z-index:1000;
}
.hamburger span{ width:24px; height:2px; background:var(--ink); transition:all .3s var(--ease); display:block; }
.hamburger.open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2){ opacity:0; }
.hamburger.open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ---------------------------------------------------------
   Hero
   --------------------------------------------------------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex; align-items:center;
  padding:140px 0 80px;
  overflow:hidden;
}
.hero-grid{
  display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center;
}
.eyebrow{
  font-family:var(--font-mono); font-size:.78rem; letter-spacing:.14em;
  text-transform:uppercase; color:var(--teal); font-weight:600;
  display:flex; align-items:center; gap:10px; margin-bottom:22px;
}
.eyebrow::before{
  content:''; width:8px; height:8px; border-radius:50%; background:var(--pulse);
  animation:beat 1.6s ease-in-out infinite;
}
@keyframes beat{
  0%,100%{ transform:scale(1); opacity:1; }
  50%{ transform:scale(1.6); opacity:.55; }
}
.hero h1{
  font-family:var(--font-display); font-weight:600;
  font-size:clamp(2.6rem, 5.4vw, 4.4rem);
  line-height:1.04; margin:0 0 20px; color:var(--ink);
  letter-spacing:-.01em;
}
.hero h1 em{ font-style:italic; color:var(--teal); font-weight:500; }
.hero-sub{
  font-size:1.15rem; color:var(--ink-soft); max-width:46ch; margin:0 0 34px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }

.btn{
  font-family:var(--font-mono); font-size:.82rem; letter-spacing:.04em;
  padding:14px 28px; border-radius:100px; display:inline-flex; align-items:center; gap:8px;
  transition:all .35s var(--ease); position:relative; overflow:hidden; cursor:pointer; border:none;
}
.btn-fill{
  background:var(--ink); color:var(--paper);
}
.btn-fill::before{
  content:''; position:absolute; inset:0; background:var(--teal);
  transform:translateX(-101%); transition:transform .4s var(--ease); z-index:0;
}
.btn-fill span{ position:relative; z-index:1; }
.btn-fill:hover::before{ transform:translateX(0); }
.btn-outline{
  background:transparent; color:var(--ink); border:1px solid rgba(18,33,31,.35);
}
.btn-outline:hover{ border-color:var(--ink); background:var(--ink); color:var(--paper); }

.hero-chart{
  position:relative;
  background:var(--white);
  border:1px solid rgba(18,33,31,.1);
  border-radius:var(--radius);
  padding:26px;
  box-shadow:0 30px 60px -30px rgba(18,33,31,.25);
}
.hero-chart__head{
  display:flex; justify-content:space-between; align-items:center;
  font-family:var(--font-mono); font-size:.7rem; letter-spacing:.06em;
  text-transform:uppercase; color:var(--ink-soft); margin-bottom:14px;
  padding-bottom:14px; border-bottom:1px dashed rgba(18,33,31,.15);
}
.hero-chart svg{ width:100%; height:auto; display:block; }
.ecg-line{
  fill:none; stroke:var(--pulse); stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round;
  stroke-dasharray:600; stroke-dashoffset:600;
  animation:draw 3.2s var(--ease) infinite;
}
@keyframes draw{
  0%{ stroke-dashoffset:600; }
  55%{ stroke-dashoffset:0; }
  100%{ stroke-dashoffset:-600; }
}
.hero-vitals{
  display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:18px;
}
.vital{
  text-align:center; padding:12px 6px; border-radius:10px; background:var(--paper);
}
.vital b{
  display:block; font-family:var(--font-display); font-size:1.5rem; color:var(--teal-deep);
}
.vital span{
  font-family:var(--font-mono); font-size:.62rem; letter-spacing:.06em; text-transform:uppercase;
  color:var(--ink-soft);
}

/* ---------------------------------------------------------
   Section shell
   --------------------------------------------------------- */
.section{ padding:120px 0; position:relative; }
.section-alt{ background:var(--mist); }
.section-head{ margin-bottom:56px; max-width:640px; }
.section-eyebrow{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.14em; text-transform:uppercase;
  color:var(--teal); font-weight:600; display:block; margin-bottom:14px;
}
.section-head h2{
  font-family:var(--font-display); font-size:clamp(2rem, 3.4vw, 2.9rem); font-weight:600;
  margin:0 0 14px; color:var(--ink); letter-spacing:-.01em;
}
.section-head p{ color:var(--ink-soft); font-size:1.02rem; max-width:56ch; margin:0; }

[data-reveal]{
  opacity:0; transform:translateY(26px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].in{ opacity:1; transform:translateY(0); }

/* ---------------------------------------------------------
   About
   --------------------------------------------------------- */
.about-grid{
  display:grid; grid-template-columns:.8fr 1.2fr; gap:64px; align-items:start;
}
.about-photo{
  position:relative; border-radius:var(--radius); overflow:hidden;
  aspect-ratio:4/5; background:var(--mist);
  border:1px solid rgba(18,33,31,.1);
}
.about-photo img{ width:100%; height:100%; object-fit:cover; }
.about-photo .tag{
  position:absolute; left:16px; bottom:16px;
  background:rgba(18,33,31,.85); color:var(--paper);
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.06em;
  padding:8px 14px; border-radius:100px; backdrop-filter:blur(4px);
}
.about-copy p{ font-size:1.05rem; color:var(--ink-soft); margin:0 0 20px; }
.about-copy strong{ color:var(--ink); font-weight:600; }

.chip-row{ display:flex; flex-wrap:wrap; gap:10px; margin-top:28px; }
.chip{
  font-family:var(--font-mono); font-size:.74rem; letter-spacing:.03em;
  padding:8px 16px; border-radius:100px; border:1px solid rgba(18,33,31,.16);
  background:var(--white); transition:all .3s var(--ease);
}
.chip:hover{ border-color:var(--teal); color:var(--teal-deep); background:var(--paper); transform:translateY(-2px); }

/* ---------------------------------------------------------
   Timeline (Experience & Education)
   --------------------------------------------------------- */
.timeline{ position:relative; margin-top:8px; }
.timeline::before{
  content:''; position:absolute; left:9px; top:6px; bottom:6px; width:1.5px;
  background:repeating-linear-gradient(180deg, rgba(18,33,31,.22) 0 6px, transparent 6px 12px);
}
.tl-item{
  position:relative; padding:0 0 48px 44px;
}
.tl-item:last-child{ padding-bottom:0; }
.tl-dot{
  position:absolute; left:0; top:4px; width:20px; height:20px; border-radius:50%;
  background:var(--paper); border:2px solid var(--teal);
  display:flex; align-items:center; justify-content:center;
  transition:transform .35s var(--ease), background .35s var(--ease);
}
.tl-dot::after{ content:''; width:7px; height:7px; border-radius:50%; background:var(--teal); }
.tl-item:hover .tl-dot{ transform:scale(1.25); background:var(--teal); }
.tl-item:hover .tl-dot::after{ background:var(--paper); }
.tl-period{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.05em; color:var(--pulse);
  text-transform:uppercase; display:block; margin-bottom:6px;
}
.tl-item h3{ font-family:var(--font-display); font-size:1.35rem; margin:0 0 4px; font-weight:600; }
.tl-org{ color:var(--ink-soft); font-size:.95rem; margin:0 0 10px; }
.tl-tags{ display:flex; flex-wrap:wrap; gap:8px; }
.tl-tags span{
  font-family:var(--font-mono); font-size:.68rem; padding:5px 10px; border-radius:6px;
  background:var(--white); border:1px solid rgba(18,33,31,.1); color:var(--ink-soft);
}

.edu-education .tl-dot{ border-color:var(--gold); }
.edu-education .tl-dot::after{ background:var(--gold); }
.edu-education .tl-item:hover .tl-dot{ background:var(--gold); }
.edu-education .tl-period{ color:var(--gold); }

/* ---------------------------------------------------------
   Skills grid
   --------------------------------------------------------- */
.skills-grid{
  display:grid; grid-template-columns:repeat(4, 1fr); gap:1px;
  background:rgba(18,33,31,.1); border:1px solid rgba(18,33,31,.1); border-radius:var(--radius);
  overflow:hidden;
}
.skill-cell{
  background:var(--white); padding:30px 22px; position:relative; overflow:hidden;
  transition:background .35s var(--ease);
}
.skill-cell::before{
  content:''; position:absolute; left:0; top:0; width:3px; height:0;
  background:var(--pulse); transition:height .35s var(--ease);
}
.skill-cell:hover{ background:var(--paper); }
.skill-cell:hover::before{ height:100%; }
.skill-cell i{
  font-size:1.3rem; color:var(--teal); margin-bottom:14px; display:block;
  transition:transform .35s var(--ease);
}
.skill-cell:hover i{ transform:translateY(-3px) scale(1.08); }
.skill-cell h4{
  font-family:var(--font-display); font-size:1.02rem; margin:0 0 6px; font-weight:600;
}
.skill-cell p{ font-size:.86rem; color:var(--ink-soft); margin:0; }

/* ---------------------------------------------------------
   Honors
   --------------------------------------------------------- */
.honor-card{
  display:flex; gap:26px; align-items:center;
  background:var(--white); border:1px solid rgba(18,33,31,.1); border-radius:var(--radius);
  padding:34px; max-width:760px;
  transition:transform .4s var(--ease), box-shadow .4s var(--ease);
}
.honor-card:hover{ transform:translateY(-4px); box-shadow:0 26px 50px -30px rgba(18,33,31,.3); }
.honor-badge{
  flex:none; width:64px; height:64px; border-radius:50%;
  background:linear-gradient(145deg, var(--gold), #C9A55E);
  display:flex; align-items:center; justify-content:center; color:var(--white); font-size:1.5rem;
}
.honor-card h3{ font-family:var(--font-display); font-size:1.2rem; margin:0 0 6px; font-weight:600; }
.honor-card p{ margin:0; color:var(--ink-soft); font-size:.94rem; }
.honor-card .tl-period{ margin-top:8px; }

/* ---------------------------------------------------------
   Contact
   --------------------------------------------------------- */
.contact-grid{
  display:grid; grid-template-columns:.85fr 1.15fr; gap:64px;
}
.contact-info h3{ font-family:var(--font-display); font-size:1.5rem; margin:0 0 18px; font-weight:600; }
.contact-info p{ color:var(--ink-soft); margin:0 0 30px; max-width:40ch; }
.contact-line{
  display:flex; align-items:center; gap:14px; margin-bottom:18px;
  font-family:var(--font-mono); font-size:.88rem;
}
.contact-line i{
  width:38px; height:38px; border-radius:50%; background:var(--white);
  border:1px solid rgba(18,33,31,.12); display:flex; align-items:center; justify-content:center;
  color:var(--teal); flex:none;
}
.social-row{ display:flex; gap:12px; margin-top:30px; }
.social-row a{
  width:42px; height:42px; border-radius:50%; border:1px solid rgba(18,33,31,.16);
  display:flex; align-items:center; justify-content:center; transition:all .3s var(--ease);
}
.social-row a:hover{ background:var(--ink); color:var(--paper); border-color:var(--ink); transform:translateY(-3px); }

.form-card{
  background:var(--white); border:1px solid rgba(18,33,31,.1); border-radius:var(--radius);
  padding:38px;
}
.field{ margin-bottom:20px; }
.field label{
  display:block; font-family:var(--font-mono); font-size:.7rem; letter-spacing:.06em;
  text-transform:uppercase; color:var(--ink-soft); margin-bottom:8px;
}
.field input, .field textarea{
  width:100%; border:1px solid rgba(18,33,31,.18); border-radius:8px; padding:13px 15px;
  font-family:var(--font-body); font-size:.96rem; background:var(--paper); color:var(--ink);
  transition:border-color .3s var(--ease), background .3s var(--ease);
}
.field input:focus, .field textarea:focus{
  border-color:var(--teal); background:var(--white); outline:none;
}
.field textarea{ resize:vertical; min-height:130px; }
.row-2{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.submit-btn{ width:100%; justify-content:center; }
.hp-field{ position:absolute; left:-9999px; opacity:0; }
.form-note{ font-family:var(--font-mono); font-size:.72rem; color:var(--ink-soft); margin-top:14px; text-align:center; }

/* ---------------------------------------------------------
   Footer
   --------------------------------------------------------- */
footer{
  padding:44px 0; border-top:1px solid rgba(18,33,31,.1);
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;
}
footer p{ font-family:var(--font-mono); font-size:.76rem; color:var(--ink-soft); margin:0; }
.back-top{
  font-family:var(--font-mono); font-size:.76rem; display:flex; align-items:center; gap:8px;
  color:var(--ink-soft); transition:color .3s var(--ease);
}
.back-top:hover{ color:var(--pulse); }

/* ---------------------------------------------------------
   Responsive
   --------------------------------------------------------- */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns:1fr; }
  .hero-chart{ order:-1; max-width:440px; }
  .about-grid{ grid-template-columns:1fr; }
  .about-photo{ max-width:340px; aspect-ratio:4/3; }
  .contact-grid{ grid-template-columns:1fr; }
  .skills-grid{ grid-template-columns:repeat(2, 1fr); }
}

@media (max-width: 720px){
  .wrap{ padding:0 22px; }
  .nav-links{
    position:fixed; top:0; right:0; height:100vh; width:78%; max-width:320px;
    background:var(--paper); flex-direction:column; align-items:flex-start;
    padding:110px 32px 40px; gap:26px; transform:translateX(100%);
    transition:transform .4s var(--ease); box-shadow:-20px 0 40px rgba(18,33,31,.12);
  }
  .nav-links.open{ transform:translateX(0); }
  .nav-links a{ font-size:.95rem; }
  .hamburger{ display:flex; }
  .nav-cta{ display:none; }
  .hero{ padding:120px 0 60px; text-align:left; }
  .section{ padding:80px 0; }
  .row-2{ grid-template-columns:1fr; }
  .honor-card{ flex-direction:column; text-align:center; padding:28px; }
  .skills-grid{ grid-template-columns:1fr 1fr; }
  footer{ flex-direction:column; text-align:center; }
}

@media (max-width: 480px){
  .skills-grid{ grid-template-columns:1fr; }
  .hero-vitals{ grid-template-columns:1fr; }
}