/* ============================================================
   SNEHA SINGH — PORTFOLIO
   Design language: "Pressed Petals & Data"
   A hand-drawn botanical journal feel — soft blush tones, a
   trailing vine motif that threads through every page (a nod
   to growth: research that starts small and blooms), and
   flower-marked notes instead of cold data points.
   ============================================================ */

:root{
  /* ---- color tokens ---- */
  --cream:      #FFF8F2;
  --cream-deep: #FCEEE3;
  --paper:      #FFFDFB;
  --blush:      #FBDDE6;
  --blush-soft: #FCE9EF;
  --pink:       #EEA6C1;
  --rose:       #D97A9B;
  --rose-deep:  #B85276;
  --mauve:      #6B4A54;
  --mauve-soft: #9C7B84;
  --gold:       #D3A76C;
  --lavender:   #E6DBF2;
  --sage:       #AFC2A4;

  /* ---- type tokens ---- */
  --font-display: "Playfair Display", Georgia, serif;
  --font-script:  "Parisienne", cursive;
  --font-body:    "Quicksand", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1120px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

body{
  margin:0;
  background:var(--cream);
  color:var(--mauve);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:500;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  background-image:
    radial-gradient(circle at 8% 12%, rgba(238,166,193,.12), transparent 40%),
    radial-gradient(circle at 92% 30%, rgba(230,219,242,.35), transparent 45%),
    radial-gradient(circle at 50% 95%, rgba(211,167,108,.10), transparent 40%);
}

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

::selection{ background:var(--pink); color:#fff; }

::-webkit-scrollbar{ width:9px; }
::-webkit-scrollbar-track{ background:var(--cream-deep); }
::-webkit-scrollbar-thumb{ background:var(--pink); border-radius:6px; }

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

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  font-style:italic;
  margin:0;
  color:var(--mauve);
  letter-spacing:.2px;
}

.eyebrow{
  font-family:var(--font-script);
  font-size:24px;
  color:var(--rose-deep);
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{ content:"✿ "; }

.section-head{
  margin-bottom:52px;
  max-width:640px;
  text-align:center;
  margin-left:auto;
  margin-right:auto;
}
.section-head h2{
  font-size:clamp(30px,4vw,44px);
  margin-top:6px;
  line-height:1.2;
}
.section-head p{
  color:var(--mauve-soft);
  margin-top:16px;
  font-size:16px;
  max-width:520px;
  margin-left:auto;
  margin-right:auto;
}

section{
  padding:100px 0;
  position:relative;
}

/* vine divider — the signature element, used between every section */
.vine-divider{
  display:flex; align-items:center; justify-content:center; gap:14px;
  margin:0 0 8px;
  color:var(--pink);
}
.vine-divider svg{ width:120px; height:16px; }
.vine-divider::before,.vine-divider::after{
  content:""; height:1px; width:60px;
  background:linear-gradient(90deg,transparent,var(--pink));
}
.vine-divider::after{ background:linear-gradient(90deg,var(--pink),transparent); }

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 28px;
  border-radius:999px;
  font-family:var(--font-body);
  font-weight:700;
  font-size:14px;
  letter-spacing:.02em;
  border:1.5px solid var(--rose);
  transition:transform .35s cubic-bezier(.2,.8,.2,1), border-color .3s, background .3s, color .3s, box-shadow .3s;
  white-space:nowrap;
}
.btn-primary{
  background:var(--rose);
  color:#fff;
  border-color:var(--rose);
}
.btn-primary:hover{ transform:translateY(-3px); box-shadow:0 14px 30px -12px rgba(217,122,155,.55); background:var(--rose-deep); border-color:var(--rose-deep); }
.btn-ghost{
  color:var(--rose-deep);
  background:transparent;
}
.btn-ghost:hover{ border-color:var(--rose-deep); background:var(--blush-soft); transform:translateY(-3px); }
.btn-sm{ padding:9px 18px; font-size:12.5px; }

/* ============================================================
   NAVIGATION
   ============================================================ */
header#site-nav{
  position:sticky; top:0; left:0; right:0; z-index:500;
  padding:16px 0;
  background:rgba(255,248,242,.88);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(217,122,155,.18);
}
.nav-inner{ display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap; }
.nav-mark{
  font-family:var(--font-script); font-size:28px; color:var(--rose-deep);
  display:flex; align-items:center; gap:8px;
}
.nav-mark .dot{ font-size:16px; }

.nav-links{ display:flex; gap:4px; flex-wrap:wrap; align-items:center; }
.nav-links a{
  font-family:var(--font-body); font-weight:600; font-size:14px;
  color:var(--mauve-soft); padding:9px 16px; border-radius:999px;
  transition:background .3s, color .3s;
  position:relative;
}
.nav-links a:hover{ background:var(--blush-soft); color:var(--rose-deep); }
.nav-links a.active{ background:var(--pink); color:#fff; }

/* ============================================================
   PAGE HERO (inner pages)
   ============================================================ */
.page-hero{
  padding:70px 0 50px;
  text-align:center;
}
.page-hero .eyebrow{ justify-content:center; }
.page-hero h1{
  font-size:clamp(38px,6vw,60px);
  margin-top:10px;
}
.page-hero p{ color:var(--mauve-soft); max-width:560px; margin:16px auto 0; font-size:16.5px; }

/* ============================================================
   HOME HERO
   ============================================================ */
#hero{ padding-top:70px; padding-bottom:90px; }
.hero-grid{ display:grid; grid-template-columns:1.1fr .9fr; gap:60px; align-items:center; }
.hero-greeting{ font-family:var(--font-script); font-size:26px; color:var(--rose-deep); }
.hero-name{ font-size:clamp(44px,6.6vw,74px); margin-top:6px; line-height:1.05; }
.hero-role{
  font-family:var(--font-body); font-weight:700; font-size:15px; letter-spacing:.06em; text-transform:uppercase;
  color:#fff; background:var(--rose); display:inline-block; padding:7px 18px; border-radius:999px; margin-top:18px;
}
.hero-intro{ margin-top:22px; color:var(--mauve-soft); font-size:16.5px; max-width:480px; }
.hero-ctas{ display:flex; gap:16px; margin-top:34px; flex-wrap:wrap; }

.hero-photo-wrap{ position:relative; display:flex; align-items:center; justify-content:center; }
.orbit-ring{
  position:absolute; border:1.5px dashed rgba(217,122,155,.4); border-radius:50%;
  width:340px; height:340px; animation:spin 40s linear infinite;
}
.orbit-ring.r2{ width:400px; height:400px; border-color:rgba(211,167,108,.35); animation-duration:60s; animation-direction:reverse; }
@keyframes spin{ to{ transform:rotate(360deg); } }
.photo-frame{
  width:280px; height:280px; border-radius:50%; overflow:hidden;
  border:6px solid var(--paper); box-shadow:0 30px 60px -25px rgba(184,82,118,.45);
  background:linear-gradient(135deg,var(--blush),var(--lavender));
  display:flex; align-items:center; justify-content:center;
  position:relative; z-index:2;
}
.photo-frame img{ width:100%; height:100%; object-fit:cover; }
.photo-monogram{
  font-family:var(--font-display); font-style:italic; font-size:110px; color:var(--rose-deep); opacity:.55;
}
.petal{ position:absolute; font-size:22px; opacity:.8; z-index:3; }
.petal.p1{ top:6%; left:0; animation:float 6s ease-in-out infinite; }
.petal.p2{ bottom:8%; right:2%; animation:float 7s ease-in-out infinite 1s; }
.petal.p3{ top:45%; right:-4%; animation:float 5.5s ease-in-out infinite .5s; }
@keyframes float{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-14px);} }

@media (max-width:900px){
  .hero-grid{ grid-template-columns:1fr; text-align:center; }
  .hero-intro{ margin-left:auto; margin-right:auto; }
  .hero-ctas{ justify-content:center; }
  .hero-photo-wrap{ margin-top:20px; }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid{ display:grid; grid-template-columns:1fr 1fr; gap:50px; align-items:start; }
.about-card{
  background:var(--paper); border:1px solid rgba(217,122,155,.18); border-radius:22px;
  padding:34px; box-shadow:0 20px 50px -30px rgba(107,74,84,.25);
}
.about-card p{ color:var(--mauve-soft); font-size:15.5px; }
.edu-item{ padding:18px 0; border-bottom:1px dashed rgba(217,122,155,.3); }
.edu-item:last-child{ border-bottom:none; }
.edu-item h4{ font-size:17px; font-style:normal; font-weight:700; font-family:var(--font-body); color:var(--mauve); }
.edu-item .edu-org{ color:var(--rose-deep); font-size:13.5px; font-weight:700; margin-top:3px; }
.edu-item .edu-meta{ color:var(--mauve-soft); font-size:13px; margin-top:4px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:6px; }
.focus-tags{ display:flex; flex-wrap:wrap; gap:8px; margin-top:14px; }
.focus-tags span{ font-size:12.5px; font-weight:700; color:var(--rose-deep); background:var(--blush-soft); padding:6px 14px; border-radius:999px; }
@media (max-width:800px){ .about-grid{ grid-template-columns:1fr; } }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
.skill-card{
  background:var(--paper); border:1px solid rgba(217,122,155,.18); border-radius:20px;
  padding:28px 24px; text-align:center; transition:transform .4s cubic-bezier(.2,.8,.2,1), box-shadow .4s;
}
.skill-card:hover{ transform:translateY(-8px) rotate(-1deg); box-shadow:0 26px 50px -28px rgba(184,82,118,.4); }
.skill-card .skill-ic{ font-size:30px; margin-bottom:12px; }
.skill-card h4{ font-size:16px; font-style:normal; font-family:var(--font-body); font-weight:700; color:var(--mauve); }
.skill-card p{ color:var(--mauve-soft); font-size:13.5px; margin-top:10px; line-height:1.8; }
@media (max-width:1000px){ .skills-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .skills-grid{ grid-template-columns:1fr; } }

.core-strip{ display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-top:44px; }
.core-strip span{ font-size:13px; font-weight:700; color:#fff; background:var(--rose); padding:9px 18px; border-radius:999px; }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.project-card{
  background:var(--paper); border:1px solid rgba(217,122,155,.18); border-radius:22px;
  overflow:hidden; display:flex; flex-direction:column;
  transition:transform .45s cubic-bezier(.2,.8,.2,1), box-shadow .45s;
  box-shadow:0 20px 45px -30px rgba(107,74,84,.3);
}
.project-card:hover{ transform:translateY(-10px) rotate(.5deg); box-shadow:0 34px 60px -28px rgba(184,82,118,.4); }
.project-media{
  height:120px; position:relative; overflow:hidden;
  background:linear-gradient(135deg,var(--blush),var(--lavender));
  display:flex; align-items:center; justify-content:center; font-size:34px;
}
.featured-tag{
  position:absolute; top:14px; left:14px; z-index:2;
  background:var(--gold); color:#fff; font-weight:700;
  font-size:10.5px; padding:5px 12px; border-radius:20px; letter-spacing:.03em;
}
.project-body{ padding:26px; display:flex; flex-direction:column; gap:12px; flex:1; }
.project-body h4{ font-size:20px; }
.project-body .project-meta{ font-size:12px; color:var(--rose-deep); font-weight:700; letter-spacing:.03em; text-transform:uppercase; }
.project-body p{ color:var(--mauve-soft); font-size:14.5px; line-height:1.65; }
.tech-row{ display:flex; flex-wrap:wrap; gap:7px; margin-top:auto; padding-top:6px; }
.tech-row span{ font-size:11px; font-weight:700; color:var(--rose-deep); border:1px solid rgba(217,122,155,.35); padding:4px 11px; border-radius:20px; }
.project-links{ display:flex; gap:10px; padding:0 26px 24px; }
@media (max-width:1000px){ .projects-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:640px){ .projects-grid{ grid-template-columns:1fr; } }

/* ============================================================
   RESEARCH
   ============================================================ */
.research-list{ display:flex; flex-direction:column; gap:26px; }
.research-item{
  display:grid; grid-template-columns:110px 1fr; gap:32px;
  padding:32px; border-radius:22px; background:var(--paper);
  border:1px solid rgba(217,122,155,.18); box-shadow:0 20px 45px -32px rgba(107,74,84,.28);
}
.research-year{ font-family:var(--font-script); font-size:26px; color:var(--rose-deep); padding-top:2px; }
.research-status{ display:inline-block; margin-top:10px; font-size:11px; font-weight:700; color:#5B7A50; background:rgba(175,194,164,.28); padding:5px 12px; border-radius:20px; }
.research-body h4{ font-size:21px; line-height:1.35; }
.research-body .abstract{ color:var(--mauve-soft); margin-top:12px; font-size:15px; }
.research-tags{ display:flex; flex-wrap:wrap; gap:7px; margin-top:16px; }
.research-tags span{ font-size:11px; font-weight:700; color:var(--mauve-soft); border:1px solid rgba(217,122,155,.3); padding:4px 11px; border-radius:20px; }
@media (max-width:700px){ .research-item{ grid-template-columns:1fr; gap:8px; } }

/* ============================================================
   EXPERIENCE
   ============================================================ */
.exp-timeline{ position:relative; padding-left:38px; }
.exp-timeline::before{ content:""; position:absolute; left:6px; top:6px; bottom:6px; width:2px; background:repeating-linear-gradient(180deg,var(--pink) 0 6px,transparent 6px 12px); }
.exp-item{ position:relative; padding-bottom:48px; }
.exp-item:last-child{ padding-bottom:0; }
.exp-dot{ position:absolute; left:-38px; top:2px; width:26px; height:26px; border-radius:50%; background:var(--paper); border:2px solid var(--rose); display:flex; align-items:center; justify-content:center; font-size:12px; }
.exp-item.current .exp-dot{ background:var(--rose); border-color:var(--rose-deep); box-shadow:0 0 0 6px rgba(217,122,155,.18); }
.exp-card{ background:var(--paper); border:1px solid rgba(217,122,155,.18); border-radius:18px; padding:26px; box-shadow:0 16px 36px -28px rgba(107,74,84,.3); }
.exp-head{ display:flex; justify-content:space-between; align-items:baseline; flex-wrap:wrap; gap:10px; }
.exp-head h4{ font-size:20px; }
.exp-duration{ font-size:12.5px; font-weight:700; color:var(--mauve-soft); }
.exp-org{ color:var(--rose-deep); font-weight:700; font-size:13px; margin-top:6px; }
.exp-desc{ color:var(--mauve-soft); margin-top:12px; font-size:15px; }
.exp-stack{ display:flex; flex-wrap:wrap; gap:7px; margin-top:14px; }
.exp-stack span{ font-size:11px; font-weight:700; color:var(--mauve-soft); border:1px solid rgba(217,122,155,.3); padding:4px 11px; border-radius:20px; }

/* ============================================================
   CERTIFICATIONS
   ============================================================ */
.cert-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.cert-card{
  background:var(--paper); border:1px solid rgba(217,122,155,.18); border-radius:18px;
  padding:28px; transition:transform .4s cubic-bezier(.2,.8,.2,1), box-shadow .3s;
  box-shadow:0 16px 36px -28px rgba(107,74,84,.28);
}
.cert-card:hover{ transform:translateY(-6px) rotate(-.5deg); }
.cert-icon{ width:44px; height:44px; border-radius:12px; background:var(--lavender); display:flex; align-items:center; justify-content:center; color:var(--rose-deep); margin-bottom:16px; font-size:20px; }
.cert-card h4{ font-size:17px; }
.cert-card .cert-issuer{ color:var(--mauve-soft); font-size:13.5px; margin-top:6px; }
.cert-card .cert-desc{ color:var(--mauve-soft); font-size:13.5px; margin-top:10px; line-height:1.7; }
@media (max-width:800px){ .cert-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .cert-grid{ grid-template-columns:1fr; } }

/* ============================================================
   CONTACT
   ============================================================ */
#contact-page .contact-grid{ display:grid; grid-template-columns:.85fr 1.15fr; gap:60px; }
.contact-list{ display:flex; flex-direction:column; gap:18px; margin-top:10px; }
.contact-list a{
  display:flex; align-items:center; gap:14px; padding:18px 20px; border-radius:16px;
  background:var(--paper); border:1px solid rgba(217,122,155,.18);
  font-weight:700; font-size:14.5px; color:var(--mauve); transition:transform .3s, box-shadow .3s;
}
.contact-list a:hover{ transform:translateX(6px); box-shadow:0 16px 30px -22px rgba(184,82,118,.4); color:var(--rose-deep); }
.contact-list .ic{ width:38px; height:38px; border-radius:10px; background:var(--blush-soft); display:flex; align-items:center; justify-content:center; flex-shrink:0; font-size:17px; }

.contact-note{
  background:var(--paper); border:1px solid rgba(217,122,155,.18); border-radius:22px; padding:36px;
  box-shadow:0 20px 45px -30px rgba(107,74,84,.28);
}
.contact-note h3{ font-size:24px; }
.contact-note p{ color:var(--mauve-soft); margin-top:14px; font-size:15.5px; }
@media (max-width:860px){ #contact-page .contact-grid{ grid-template-columns:1fr; gap:40px; } }

/* ============================================================
   FOOTER
   ============================================================ */
footer{ padding:50px 0 36px; border-top:1px solid rgba(217,122,155,.2); margin-top:40px; }
.footer-inner{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:20px; }
.footer-links{ display:flex; gap:22px; flex-wrap:wrap; }
.footer-links a{ font-size:13px; font-weight:700; color:var(--mauve-soft); }
.footer-links a:hover{ color:var(--rose-deep); }
.footer-copy{ font-family:var(--font-script); font-size:20px; color:var(--rose-deep); }

/* ============================================================
   RESPONSIVE NAV
   ============================================================ */
@media (max-width:900px){
  .nav-inner{ flex-direction:column; align-items:flex-start; }
  .nav-links{ width:100%; justify-content:center; }
}