/* =========================================================
   Santhosh S — Professional Portfolio System
   Preserves the original ivory + gold visual identity while
   refining hierarchy, spacing, depth, responsiveness and polish.
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:110px}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:
    radial-gradient(circle at 10% 8%, rgba(212,175,55,.08), transparent 28%),
    radial-gradient(circle at 90% 82%, rgba(232,206,122,.10), transparent 30%),
    var(--ivory);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--gold);color:#1a1613}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;letter-spacing:-.025em;margin:0}
h1{font-size:clamp(3.2rem,7vw,6.6rem);line-height:.92}
h2{font-size:clamp(2.25rem,4.4vw,4rem);line-height:1}
h3{font-size:clamp(1.25rem,1.7vw,1.55rem)}
p{line-height:1.75;color:var(--ink-soft);margin:0}
.container{width:min(1240px,100%);margin:0 auto;padding:0 32px}
section{padding:128px 0;position:relative}

/* Background atmosphere */
.ambient{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.orb{position:absolute;border-radius:50%;filter:blur(100px);opacity:.5}
.orb.o1{width:540px;height:540px;top:-170px;left:-160px;background:radial-gradient(circle,rgba(212,175,55,.48),transparent 68%)}
.orb.o2{width:680px;height:680px;bottom:-260px;right:-220px;background:radial-gradient(circle,rgba(232,206,122,.38),transparent 68%)}
.orb.o3{width:440px;height:440px;top:40%;left:52%;background:radial-gradient(circle,rgba(168,132,42,.22),transparent 68%)}
.particles{position:absolute;inset:0}

/* Cursor */
.cursor{position:fixed;top:0;left:0;width:22px;height:22px;border-radius:50%;border:1px solid var(--gold);pointer-events:none;z-index:9999;transform:translate(-50%,-50%);transition:transform .18s var(--ease),width .2s,height .2s,background .2s;mix-blend-mode:difference}
.cursor.dot{width:6px;height:6px;background:var(--gold);border:none}
@media(hover:none){.cursor{display:none}}

/* Progress */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:linear-gradient(90deg,var(--gold-deep),var(--gold),var(--gold-soft));z-index:100}

/* Navigation */
.nav{
  position:fixed;top:20px;left:50%;transform:translateX(-50%);
  z-index:80;padding:7px;border-radius:999px;
  background:rgba(251,248,243,.72);
  border:1px solid rgba(168,132,42,.16);
  backdrop-filter:blur(22px) saturate(150%);
  -webkit-backdrop-filter:blur(22px) saturate(150%);
  box-shadow:0 18px 50px -24px rgba(26,22,19,.35);
  display:flex;align-items:center;gap:3px;
}
[data-theme="dark"] .nav{background:rgba(12,10,8,.72)}
.nav a{
  padding:9px 15px;border-radius:999px;font-size:12px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--ink);
  opacity:.72;transition:all .3s var(--ease)
}
.nav a:hover,.nav a.active{
  background:linear-gradient(135deg,rgba(212,175,55,.18),rgba(232,206,122,.10));
  opacity:1;color:var(--gold-deep)
}
.nav .brand{
  font-family:var(--serif);font-size:17px;font-weight:700;
  padding:0 14px 0 12px;letter-spacing:.08em
}
.nav .brand em{color:var(--gold-deep);font-style:normal}
.theme-toggle{
  margin-left:4px;width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--ink);
  cursor:pointer;display:grid;place-items:center;transition:all .3s var(--ease)
}
.theme-toggle:hover{transform:rotate(15deg);border-color:var(--gold);background:rgba(212,175,55,.08)}

/* Shared controls */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 21px;border-radius:999px;font-weight:600;font-size:12px;
  letter-spacing:.08em;text-transform:uppercase;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s,border-color .3s;
  cursor:pointer;border:1px solid transparent
}
.btn:hover{transform:translateY(-3px)}
.btn-gold{background:linear-gradient(135deg,var(--gold-deep),var(--gold),var(--gold-soft));color:#1a1613;box-shadow:0 12px 35px -13px rgba(212,175,55,.75)}
.btn-gold:hover{box-shadow:0 18px 48px -12px rgba(212,175,55,.68)}
.btn-ghost{background:var(--glass-bg);border:1px solid var(--glass-brd);backdrop-filter:blur(12px);color:var(--ink)}
.btn-ghost:hover{border-color:rgba(212,175,55,.6);background:rgba(212,175,55,.07)}

/* Cards */
.glass{
  background:var(--glass-bg);border:1px solid var(--glass-brd);
  backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);
  border-radius:var(--radius);box-shadow:var(--shadow-soft)
}
.neu{
  background:var(--ivory);border-radius:var(--radius);
  box-shadow:12px 12px 32px rgba(26,22,19,.07),-12px -12px 32px rgba(255,255,255,.8),inset 0 0 0 1px var(--line)
}
[data-theme="dark"] .neu{box-shadow:12px 12px 32px rgba(0,0,0,.5),-6px -6px 20px rgba(255,255,255,.02),inset 0 0 0 1px var(--line)}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:10px;
  font-weight:700;letter-spacing:.34em;text-transform:uppercase;color:var(--gold-deep)
}
.eyebrow::before{content:'';width:28px;height:1px;background:var(--gold)}
.eyebrow::after{display:none}
.section-head{text-align:center;margin:0 auto 68px;max-width:800px}
.section-head p{margin-top:18px}

/* Hero */
.hero{
  min-height:100vh;display:grid;place-items:center;
  padding:170px 0 100px;position:relative
}
.hero .inner{
  display:grid;grid-template-columns:1.05fr .95fr;gap:90px;
  align-items:center;width:min(1240px,100%);padding:0 32px
}
.hero .inner>div:first-child{position:relative}
.hero .inner>div:first-child::before{
  content:'';position:absolute;left:-70px;top:-80px;width:190px;height:190px;
  border:1px solid rgba(212,175,55,.13);border-radius:50%;pointer-events:none
}
.hero h1{margin-top:22px}
.hero h1 .first{font-weight:700;filter:drop-shadow(0 3px 28px rgba(212,175,55,.18))}
.hero h1 .last{
  font-weight:800;color:var(--gold-deep);
  -webkit-text-stroke:.5px var(--gold);
  text-shadow:0 0 42px rgba(212,175,55,.28);font-style:italic
}
[data-theme="dark"] .hero h1 .last{color:var(--gold)}
.hero .inner>div:first-child>div:nth-of-type(1){
  margin-top:18px!important;font-size:18px!important;
  letter-spacing:.01em;color:var(--ink-soft)
}
.hero .lede{margin-top:30px;max-width:570px;font-size:16px}
.hero .cta{display:flex;flex-wrap:wrap;gap:11px;margin-top:36px}
.profile-frame{
  position:relative;aspect-ratio:4/5;border-radius:34px;overflow:visible;
  transform-style:preserve-3d;transition:transform .3s var(--ease);
  box-shadow:0 40px 100px -35px rgba(26,22,19,.38)
}
.profile-frame img{
  position:relative;width:100%;height:100%;object-fit:cover;border-radius:34px;
  border:1px solid rgba(255,255,255,.5);
  box-shadow:0 0 0 1px rgba(212,175,55,.14),inset 0 0 70px rgba(212,175,55,.12)
}
.profile-frame::before{
  content:'';position:absolute;inset:-10px;border-radius:42px;
  border:1px solid rgba(212,175,55,.28);z-index:-1
}
.profile-frame::after{
  content:'';position:absolute;inset:0;border-radius:34px;pointer-events:none;
  background:linear-gradient(150deg,rgba(255,255,255,.22),transparent 35%,rgba(212,175,55,.12))
}
.profile-frame .ring{
  position:absolute;inset:-27px;border-radius:46px;border:1px dashed var(--gold);
  animation:spinSlow 30s linear infinite;opacity:.38;z-index:-2
}
.profile-frame .badge{
  position:absolute;bottom:18px;left:18px;padding:8px 13px;border-radius:999px;
  background:rgba(20,17,13,.58);color:#fff;border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(14px);font-size:10px;letter-spacing:.15em;text-transform:uppercase;z-index:3
}
.scroll-indicator{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:9px;font-size:9px;
  font-weight:600;letter-spacing:.32em;text-transform:uppercase;color:var(--ink-soft)
}
.scroll-indicator .line{width:1px;height:52px;background:linear-gradient(180deg,var(--gold),transparent);animation:floatY 2.6s ease-in-out infinite}

/* About */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:90px;align-items:center}
.about-grid p{margin-top:18px;font-size:15px}
.about-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:27px}
.tag{
  padding:7px 12px;border-radius:999px;background:var(--glass-bg);
  border:1px solid var(--glass-brd);font-size:10px;font-weight:600;
  letter-spacing:.07em;text-transform:uppercase
}
.portrait-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.portrait-strip img{
  aspect-ratio:3/4;object-fit:cover;border-radius:20px;box-shadow:var(--shadow-soft);
  transition:transform .6s var(--ease),filter .6s var(--ease)
}
.portrait-strip img:hover{transform:translateY(-9px) scale(1.02);filter:saturate(1.04)}

/* Skills */
.skills-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.skill-card{
  padding:32px;transition:transform .5s var(--ease),box-shadow .5s var(--ease);
  position:relative;overflow:hidden
}
.skill-card::before{
  content:'';position:absolute;top:0;left:0;width:80px;height:1px;
  background:linear-gradient(90deg,var(--gold),transparent)
}
.skill-card:hover{transform:translateY(-7px);box-shadow:var(--shadow-gold)}
.skill-card h3{margin-bottom:19px;color:var(--gold-deep)}
.skill-list{display:flex;flex-wrap:wrap;gap:7px}
.skill-pill{
  padding:6px 10px;border-radius:999px;font-size:10px;font-weight:500;
  letter-spacing:.04em;background:linear-gradient(135deg,rgba(212,175,55,.13),rgba(232,206,122,.06));
  border:1px solid rgba(212,175,55,.2)
}
.ring-row{display:flex;gap:17px;margin-top:24px;flex-wrap:wrap;justify-content:space-around}
.ring{position:relative;width:78px;text-align:center}
.ring svg{width:78px;height:78px;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:6}
.ring .bg{stroke:var(--line)}
.ring .fg{stroke:url(#goldGrad);stroke-linecap:round;transition:stroke-dashoffset 1.6s var(--ease)}
.ring .val{position:absolute;top:30px;left:0;right:0;font-family:var(--serif);font-size:18px;color:var(--gold-deep)}
.ring .lbl{font-size:9px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;margin-top:8px;color:var(--ink-soft)}

/* AI workflow addition */
.ai-workflow{margin-top:24px;padding:34px;position:relative;overflow:hidden}
.ai-workflow::after{
  content:'AI';position:absolute;right:-18px;bottom:-48px;
  font-family:var(--serif);font-size:170px;font-weight:700;font-style:italic;
  color:rgba(212,175,55,.055);pointer-events:none
}
.workflow-head{display:flex;justify-content:space-between;gap:28px;align-items:end;margin-bottom:26px}
.workflow-head h3{font-size:1.8rem}
.workflow-head p{max-width:590px;font-size:13px}
.workflow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.workflow-item{
  padding:18px;border-radius:16px;border:1px solid var(--line);
  background:rgba(255,255,255,.18)
}
[data-theme="dark"] .workflow-item{background:rgba(255,255,255,.025)}
.workflow-item .step{font-size:9px;letter-spacing:.2em;color:var(--gold-deep);font-weight:700;text-transform:uppercase}
.workflow-item strong{display:block;margin-top:8px;font-family:var(--serif);font-size:1.15rem}
.workflow-item span{display:block;margin-top:6px;font-size:11px;line-height:1.55;color:var(--ink-soft)}

/* Projects */
.projects-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.project{
  overflow:hidden;padding:0;transition:transform .5s var(--ease),box-shadow .5s var(--ease);
  border-radius:24px
}
.project:hover{transform:translateY(-8px);box-shadow:var(--shadow-gold)}
.project .thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.project .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease)}
.project:hover .thumb img{transform:scale(1.06)}
.project .thumb::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 48%,rgba(0,0,0,.4));pointer-events:none}
.project .thumb .live-badge{
  position:absolute;top:14px;left:14px;padding:6px 10px;border-radius:999px;
  font-size:9px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  background:rgba(20,17,13,.6);color:#fff;border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(12px);z-index:2
}
.project .body{padding:25px}
.project h3{font-size:1.65rem}
.project .tech{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0 14px}
.project .actions{display:flex;gap:8px;margin-top:18px}
.project .actions a{font-size:10px;padding:9px 13px}

/* Timeline */
.timeline{position:relative;max-width:820px;margin:0 auto;padding:20px 0}
.timeline::before{content:'';position:absolute;top:0;bottom:0;left:20px;width:1px;background:linear-gradient(180deg,transparent,var(--gold),transparent)}
.tl-item{position:relative;padding:18px 0 32px 60px}
.tl-item::before{content:'';position:absolute;left:14px;top:26px;width:14px;height:14px;border-radius:50%;background:radial-gradient(circle,var(--gold),var(--gold-deep));box-shadow:0 0 0 4px rgba(212,175,55,.15)}
.tl-item h4{font-size:1.4rem;margin-bottom:6px}
.tl-item .when{font-size:10px;letter-spacing:.24em;text-transform:uppercase;color:var(--gold-deep);font-weight:700}

/* Achievements */
.ach-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.ach{padding:28px;min-height:190px;text-align:left;transition:transform .5s var(--ease),box-shadow .5s var(--ease)}
.ach:hover{transform:translateY(-6px);box-shadow:var(--shadow-soft)}
.ach .num{font-family:var(--serif);font-size:2.5rem;background:linear-gradient(135deg,var(--gold-deep),var(--gold-soft));-webkit-background-clip:text;background-clip:text;color:transparent}
.ach h4{margin:5px 0 8px;font-size:1.2rem}

/* Vision */
.vision{text-align:center;max-width:900px;margin:0 auto;padding:72px 60px;position:relative;overflow:hidden}
.vision::before{content:'';position:absolute;inset:18px;border:1px solid rgba(212,175,55,.13);border-radius:calc(var(--radius) - 8px);pointer-events:none}
.vision h2{font-style:italic}
.vision h2 em{color:var(--gold-deep);font-style:italic}
.vision p{margin:22px auto 0;max-width:700px;font-size:16px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:22px}
.contact-info{padding:30px}
.contact-info a{display:flex;align-items:center;gap:14px;padding:15px 0;border-bottom:1px solid var(--line);transition:color .3s,transform .3s}
.contact-info a:hover{color:var(--gold-deep);transform:translateX(4px)}
.contact-info a:last-child{border-bottom:0}
.contact-info .k{display:block;font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold-deep);margin-bottom:4px;font-weight:700}
.contact{padding:30px;display:grid;gap:17px}
.contact label{display:block;font-size:10px;letter-spacing:.15em;text-transform:uppercase;font-weight:700;margin-bottom:8px}
.contact input,.contact textarea{
  width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px;
  background:rgba(255,255,255,.25);color:var(--ink);outline:none;transition:border-color .25s,box-shadow .25s
}
[data-theme="dark"] .contact input,[data-theme="dark"] .contact textarea{background:rgba(255,255,255,.025)}
.contact input:focus,.contact textarea:focus{border-color:rgba(212,175,55,.6);box-shadow:0 0 0 4px rgba(212,175,55,.08)}
.contact textarea{min-height:150px;resize:vertical}
.map{height:310px;margin-top:22px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-soft)}

/* Footer */
footer{padding:70px 0 42px;text-align:center}
.gold-line{width:min(1240px,calc(100% - 64px));height:1px;margin:0 auto 44px;background:linear-gradient(90deg,transparent,var(--gold),transparent)}
.socials{display:flex;justify-content:center;gap:10px;margin:20px 0}
.socials a{width:38px;height:38px;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);transition:all .3s}
.socials a:hover{border-color:var(--gold);color:var(--gold-deep);transform:translateY(-3px)}
footer p:last-child{font-size:10px;letter-spacing:.08em;margin-top:26px;color:var(--ink-soft)}

/* Accessibility / motion */
:focus-visible{outline:2px solid var(--gold);outline-offset:4px}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}
}