/* ─────────────────────────────────────────────────────────────────
   Nitin Mathur — Personal Portfolio
   styles.css
───────────────────────────────────────────────────────────────── */

:root {
  --bg:       #F7F5F0;
  --bg2:      #EDEAE3;
  --surface:  #FFFFFF;

  /* Navy palette (primary brand) */
  --navy:     #1A3A6B;
  --navy-mid: #2E5FA3;
  --navy-lt:  #4A7FCC;

  /* Microsoft accent — used sparingly for subtle MS identity */
  --ms-blue:  #0078D4;
  --ms-blue-lt: rgba(0,120,212,.08);

  --gold:     #C8973A;
  --gold-lt:  #E8B85A;
  --text:     #1C1C1E;
  --muted:    #5A5A6A;
  --faint:    #9090A0;
  --border:   #D8D4CC;
  --border-l: #E8E4DC;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'DM Sans', 'Helvetica Neue', sans-serif;

  --radius:    12px;
  --radius-lg: 20px;
  --shadow:    0 2px 16px rgba(26,58,107,.07);
  --shadow-lg: 0 8px 40px rgba(26,58,107,.12);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Subtle Microsoft-blue top accent stripe */
body::before {
  content: '';
  display: block;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ms-blue) 0%, var(--navy-lt) 50%, var(--gold) 100%);
  z-index: 300;
}

a { color: inherit; text-decoration: none; }
p { color: var(--muted); line-height: 1.8; }

/* ── LAYOUT ───────────────────────────────────────── */
.wrap { max-width: 98%; margin: 0 auto; padding: 0 40px; }

/* ── NAV ──────────────────────────────────────────── */
.nav {
  position: fixed; top: 3px; left: 0; right: 0; height: 64px; z-index: 200;
  background: rgba(247,245,240,.92);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-l);
}
.nav__inner {
  max-width: 1040px; margin: 0 auto; padding: 0 40px;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav__brand {
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 600; color: var(--navy);
  letter-spacing: -.01em;
  display: flex; align-items: center; gap: 10px;
}
.nav__brand em { color: var(--gold); font-style: normal; }

/* Microsoft 4-square icon next to brand name */
.nav__ms-icon {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
  width: 14px; height: 14px; flex-shrink: 0;
}
.nav__ms-icon span {
  display: block; border-radius: 1px;
}
.nav__ms-icon span:nth-child(1) { background: #F25022; }
.nav__ms-icon span:nth-child(2) { background: #7FBA00; }
.nav__ms-icon span:nth-child(3) { background: #00A4EF; }
.nav__ms-icon span:nth-child(4) { background: #FFB900; }

.nav__links { display: flex; gap: 32px; }
.nav__link {
  font-size: .8rem; font-weight: 500; letter-spacing: .06em;
  text-transform: uppercase; color: var(--muted);
  transition: color 150ms;
}
.nav__link:hover { color: var(--navy); }
.nav__cta {
  font-size: .8rem; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase;
  background: var(--navy); color: #fff;
  padding: 8px 20px; border-radius: 100px;
  transition: background 150ms, transform 150ms;
}
.nav__cta:hover { background: var(--navy-mid); transform: translateY(-1px); }

/* ── HERO ─────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding-top: 67px; position: relative; overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 50%, rgba(74,127,204,.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 10% 80%, rgba(200,151,58,.06) 0%, transparent 50%);
}
.hero__grid {
  position: absolute; inset: 0; z-index: 0; opacity: .4;
  background-image:
    linear-gradient(var(--border-l) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-l) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}
.hero__inner {
  position: relative; z-index: 1; padding: 80px 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}

/* Profile photo */
.hero__photo-wrap {
  display: none;
  margin-bottom: 24px;
}
.hero__photo-wrap.loaded { display: flex; gap: 20px }
.hero__photo {
  width: 90px; height: 90px; border-radius: 50%;
  object-fit: cover; object-position: center top;
  border: 3px solid var(--surface);
  box-shadow: 0 0 0 3px var(--navy-lt), var(--shadow-lg);
  display: block;
}

.hero__label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .75rem; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--navy-mid);
  background: rgba(46,95,163,.08); border: 1px solid rgba(46,95,163,.15);
  padding: 5px 14px; border-radius: 100px; margin-bottom: 24px;
}
.hero__label::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--navy-lt); animation: pulse 2s ease infinite;
}
.hero__name {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700; line-height: 1.1; letter-spacing: -.03em;
  color: var(--navy); margin-bottom: 8px;
}
.hero__name em { color: var(--gold); font-style: normal; }
.hero__role {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: 300; 
  font-style: italic;
  color: var(--muted); 
  margin-bottom: 10px;
}
.hero__bio {
  font-size: 1rem; color: var(--muted); line-height: 1.85;
  max-width: 480px; margin-bottom: 36px;
  text-align: justify;
}

.hero__stats { display: flex; gap: 32px; margin-bottom: 40px; }
.stat__num {
  font-family: var(--font-display);
  font-size: 2rem; font-weight: 700; color: var(--navy); line-height: 1;
}
.stat__num em { color: var(--gold); font-style: normal; }
.stat__label {
  font-size: .75rem; color: var(--faint); letter-spacing: .04em;
  text-transform: uppercase; margin-top: 4px;
}

.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 100px;
  font-size: .85rem; font-weight: 600; letter-spacing: .02em;
  transition: all 150ms;
}
.btn--primary { background: var(--navy); color: #fff; }
.btn--primary:hover { background: var(--navy-mid); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn--ghost { background: transparent; color: var(--navy); border: 1.5px solid var(--navy); }
.btn--ghost:hover { background: var(--navy); color: #fff; transform: translateY(-2px); }

/* Hero visual panel */
.hero__visual { display: flex; flex-direction: column; gap: 18px; }
.cert-badge {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 18px;
  display: flex; align-items: center; gap: 14px;
  box-shadow: var(--shadow);
  transition: transform 200ms, box-shadow 200ms;
  animation: floatIn 0.6s ease both;
}
.cert-badge:hover { transform: translateX(4px); box-shadow: var(--shadow-lg); }
.cert-badge__icon {
  width: 36px; height: 36px; border-radius: 8px;
  background: linear-gradient(135deg, var(--ms-blue), var(--navy-lt));
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.cert-badge__icon svg { width: 18px; height: 18px; fill: none; stroke: #fff; stroke-width: 2; }
.cert-badge__name { font-size: .8rem; font-weight: 600; color: var(--text); line-height: 1.3; }
.cert-badge__sub { font-size: .7rem; color: var(--faint); margin-top: 2px; }
.cert-badge__pill {
  margin-left: auto; font-size: .65rem; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  background: var(--ms-blue-lt); color: var(--ms-blue);
  padding: 3px 10px; border-radius: 100px; flex-shrink: 0;
}

/* ── SECTION COMMON ───────────────────────────────── */
section { padding: 100px 0; }
.section-label {
  font-size: .75rem; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 10px;
}
.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700; color: var(--navy);
  letter-spacing: -.02em; line-height: 1.15; margin-bottom: 16px;
}
.section-sub {
  font-size: 1rem; color: var(--muted); max-width: 540px;
  line-height: 1.8; margin-bottom: 56px;
}

/* ── ABOUT ────────────────────────────────────────── */
.about { background: var(--surface); }
.about__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.about__card {
  background: var(--bg); border-radius: var(--radius-lg);
  padding: 32px; border: 1px solid var(--border-l); margin-bottom: 16px;
}
.about__card-title {
  font-size: .7rem; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--navy-mid); margin-bottom: 12px;
}
.skill-pill {
  display: inline-block; font-size: .75rem; font-weight: 500;
  background: var(--surface); color: var(--navy);
  border: 1px solid var(--border); border-radius: 100px;
  padding: 4px 14px; margin: 3px 3px 3px 0; transition: all 150ms;
}
.skill-pill:hover { background: var(--navy); color: #fff; border-color: var(--navy); }
.skill-pill--gold {
  background: rgba(200,151,58,.08); color: var(--gold); border-color: rgba(200,151,58,.25);
}

/* ── EXPERIENCE ───────────────────────────────────── */
.experience { background: var(--bg2); }
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ''; position: absolute; left: 0; top: 8px; bottom: 8px;
  width: 2px; background: linear-gradient(to bottom, var(--navy-lt), var(--border));
  border-radius: 2px;
}
.timeline-item { position: relative; margin-bottom: 48px; }
.timeline-item::before {
  content: ''; position: absolute; left: -34px; top: 6px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--navy); border: 2px solid var(--bg2);
  box-shadow: 0 0 0 3px rgba(26,58,107,.15);
}
.timeline-item:first-child::before { background: var(--gold); }
.exp__header {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; margin-bottom: 6px; flex-wrap: wrap;
}
.exp__company { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; color: var(--navy); }
.exp__dates {
  font-size: .75rem; font-weight: 500; color: var(--faint);
  background: var(--surface); border: 1px solid var(--border);
  padding: 3px 12px; border-radius: 100px; white-space: nowrap;
}
.exp__title { font-size: .85rem; font-style: italic; color: var(--navy-mid); margin-bottom: 14px; }
.exp__bullets { list-style: none; }
.exp__bullets li {
  font-size: .88rem; color: var(--muted); padding: 4px 0 4px 18px;
  position: relative; line-height: 1.7;
}
.exp__bullets li::before {
  content: '→'; position: absolute; left: 0; color: var(--gold); font-size: .75rem; top: 5px;
}

/* ── SKILLS ───────────────────────────────────────── */
.skills { background: var(--surface); }
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skill-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  transition: transform 200ms, box-shadow 200ms, border-color 200ms;
}
.skill-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(26,58,107,.2); }
.skill-card__icon { width: 44px; height: 44px; border-radius: 10px; margin-bottom: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; }
.skill-card__title { font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--navy); margin-bottom: 10px; }
.skill-card__items { font-size: .82rem; color: var(--muted); line-height: 1.9; }

/* ── POWER PLATFORM PROJECTS ──────────────────────── */
.pp-projects { background: var(--surface); }
.pp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.pp-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  position: relative; overflow: hidden;
  transition: transform 200ms, box-shadow 200ms, border-color 200ms;
}
.pp-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--ms-blue), var(--navy-lt));
  transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.pp-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(0,120,212,.2); }
.pp-card:hover::before { transform: scaleX(1); }

.pp-card__head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 12px; margin-bottom: 14px;
}
.pp-card__icon {
  width: 44px; height: 44px; border-radius: 10px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--ms-blue), var(--navy-lt));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.pp-card__company {
  font-size: .68rem; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--faint);
  background: var(--surface); border: 1px solid var(--border);
  padding: 3px 10px; border-radius: 100px; white-space: nowrap;
  align-self: flex-start; margin-top: 2px;
}
.pp-card__name {
  font-family: var(--font-display);
  font-size: 1.05rem; font-weight: 700; color: var(--navy);
  margin-bottom: 8px; line-height: 1.3;
}
.pp-card__desc { font-size: .84rem; color: var(--muted); line-height: 1.75; margin-bottom: 16px; }
.pp-card__tags { display: flex; flex-wrap: wrap; gap: 5px; }
.pp-card__tag {
  font-size: .65rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ms-blue);
  background: var(--ms-blue-lt); border: 1px solid rgba(0,120,212,.15);
  padding: 3px 9px; border-radius: 100px;
}

/* ── AI PROJECTS ──────────────────────────────────── */
.projects { background: var(--bg2); }
.projects__header { margin-bottom: 56px; }
.ai-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .7rem; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--gold);
  background: rgba(200,151,58,.1); border: 1px solid rgba(200,151,58,.25);
  padding: 4px 12px; border-radius: 100px; margin-bottom: 14px;
}
.app-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.app-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 36px;
  transition: transform 200ms, box-shadow 200ms;
  position: relative; overflow: hidden;
}
.app-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--navy), var(--navy-lt));
  transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.app-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.app-card:hover::after { transform: scaleX(1); }
.app-card__icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, var(--navy), var(--navy-lt));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: var(--font-display); font-weight: 700;
  font-size: 1rem; letter-spacing: .04em; margin-bottom: 20px;
}
.app-card__name { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.app-card__sub { font-size: .75rem; font-weight: 500; color: var(--faint); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 14px; }
.app-card__desc { font-size: .88rem; color: var(--muted); line-height: 1.8; margin-bottom: 20px; }
.app-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 24px; }
.app-tag {
  font-size: .68rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase;
  color: var(--navy-mid); background: rgba(46,95,163,.07); border: 1px solid rgba(46,95,163,.15);
  padding: 3px 10px; border-radius: 100px;
}
.app-links { display: flex; gap: 10px; flex-wrap: wrap; }
.app-link { font-size: .78rem; font-weight: 600; letter-spacing: .04em; padding: 8px 18px; border-radius: 100px; transition: all 150ms; }
.app-link--primary { background: var(--navy); color: #fff; }
.app-link--primary:hover { background: var(--navy-mid); transform: translateY(-1px); }
.app-link--ghost { color: var(--navy); border: 1.5px solid var(--border); }
.app-link--ghost:hover { border-color: var(--navy); transform: translateY(-1px); }

/* ── CERTIFICATIONS ───────────────────────────────── */
.certifications { background: var(--navy); }
.certifications .section-label { color: var(--gold-lt); }
.certifications .section-heading { color: #fff; }
.certifications .section-sub { color: rgba(255,255,255,.55); }
.certs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.cert-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius); padding: 20px 22px;
  display: flex; align-items: center; gap: 14px;
  transition: background 200ms, transform 200ms;
  min-width: 0;   /* allows flex children to shrink on mobile */
}
.cert-card:hover { background: rgba(255,255,255,.1); transform: translateY(-2px); }
.cert-card__num {
  font-family: var(--font-display); font-size: 1rem; font-weight: 700;
  color: var(--gold-lt); flex-shrink: 0; min-width: 40px;
}
.cert-card__text {
  font-size: .78rem; color: rgba(255,255,255,.75); line-height: 1.5;
  min-width: 0; word-break: break-word;
}
.cert-card__text strong { color: #fff; font-weight: 600; display: block; }

/* ── CONTACT / FOOTER ─────────────────────────────── */
.contact { background: var(--bg); padding-bottom: 0; }
.contact__inner {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 64px;
  text-align: center; box-shadow: var(--shadow);
}
.contact__heading { font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 700; color: var(--navy); margin-bottom: 12px; }
.contact__sub { color: var(--muted); max-width: 460px; margin: 0 auto 36px; }
.contact__links { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

footer { background: var(--bg); border-top: 1px solid var(--border-l); padding: 40px 0; margin-top: 80px; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer__brand { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--navy); }
.footer__copy { font-size: .8rem; color: var(--faint); }
.footer__links { display: flex; gap: 24px; }
.footer__link { font-size: .78rem; font-weight: 500; color: var(--faint); letter-spacing: .04em; text-transform: uppercase; transition: color 150ms; }
.footer__link:hover { color: var(--navy); }

/* ── ANIMATIONS ───────────────────────────────────── */
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }
@keyframes floatIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.animate-in { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.animate-in.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ───────────────────────────────────── */
@media (max-width: 860px) {
  .wrap { padding: 0 20px; }
  .nav__links { display: none; }
  .hero__inner { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero__stats { justify-content: center; }
  .hero__actions { justify-content: center; }
  .hero__bio { margin: 0 auto 36px; }
  .hero__label { display: inline-flex; }
  .about__inner { grid-template-columns: 1fr; gap: 40px; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .pp-grid { grid-template-columns: 1fr 1fr; }
  .app-cards { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr 1fr; }
  .contact__inner { padding: 40px 24px; }
}

@media (max-width: 560px) {
  section { padding: 70px 0; }
  .skills-grid { grid-template-columns: 1fr; }
  .pp-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }  /* single column — gives each card full width */
  .cert-card { padding: 16px 14px; gap: 10px; } /* tighter padding so text fits */
  .cert-card__num { font-size: .88rem; min-width: 36px; }
  .cert-card__text { font-size: .74rem; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .nav__cta { display: none; }
}