/* ============================================================
   vivekkaliraman.com — personal portfolio
   Editorial, type-driven one-pager. Single 860px breakpoint.
   All tokens/measurements per the design handoff.
   ============================================================ */

:root {
  /* Color tokens */
  --bg: #f5f7f9;
  --bg-tint: #eef1f4;
  --ink: #1a2129;
  --body: #46525e;
  --muted: #6c7783;
  --muted-2: #56616d;
  --faint: #9aa3ac;
  --accent: #3f7ca6;
  --accent-tint: #eef4f8;
  --hairline: #e0e5ea;
  --dashed: #c6cfd7;

  /* Contact (dark) */
  --contact-bg: #1a2129;
  --contact-text: #e9edf1;
  --contact-accent: #7fb2cc;
  --contact-field-bg: #222c36;
  --contact-field-border: #313d48;
  --contact-hairline: #2c3742;
  --contact-btn-text: #0e1620;

  /* Fonts */
  --sans: 'IBM Plex Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
  --serif: 'IBM Plex Serif', serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
::selection { background: #cfe0ec; }
input, textarea, button { font-family: inherit; }
input::placeholder, textarea::placeholder { color: #7f8b96; }

/* ---------- Section scaffolding ---------- */
.section { padding: 70px 7vw; border-bottom: 1px solid var(--hairline); }
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--accent);
}
.section-intro {
  font-size: 18px;
  line-height: 1.6;
  color: var(--body);
  max-width: 72ch;
  margin: 0 0 42px;
}
.tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted-2);
  background: var(--bg-tint);
  padding: 4px 9px;
  border-radius: 2px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 7vw;
  background: rgba(245, 247, 249, .86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.wordmark {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: .02em;
}
.navlinks {
  display: flex;
  gap: 30px;
  font-size: 13.5px;
  color: var(--muted-2);
  flex-wrap: wrap;
  justify-content: flex-end;
}
.navlinks a:hover { color: var(--ink); }

/* Hamburger toggle — hidden on desktop, shown ≤860px */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin: -8px -8px -8px 0;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--ink);
}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  display: block;
  width: 22px;
  height: 1.5px;
  background: currentColor;
  transition: transform .22s ease, opacity .22s ease;
}
.nav-toggle-bars { position: relative; }
.nav-toggle-bars::before { position: absolute; left: 0; top: -6px; }
.nav-toggle-bars::after { position: absolute; left: 0; top: 6px; }
.nav.open .nav-toggle-bars { background: transparent; }
.nav.open .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.nav.open .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding: 84px 7vw 70px;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: end;
  border-bottom: 1px solid var(--hairline);
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--accent);
  margin-bottom: 26px;
}
.hero h1 {
  font-weight: 600;
  font-size: clamp(40px, 4.6vw, 68px);
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 18ch;
}
.hero-sub {
  font-size: 21px;
  line-height: 1.5;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.01em;
  max-width: 34ch;
  margin: 28px 0 0;
}
.hero-bio {
  font-size: 16px;
  line-height: 1.74;
  color: var(--body);
  max-width: 66ch;
  margin: 22px 0 0;
}

/* Stats grid — stays 2 columns at all sizes */
.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  font-family: var(--mono);
}
.stat { background: var(--bg); padding: 22px 18px; }
.stat-num {
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.stat-num.sm { font-size: 24px; }
.stat-num .mid { font-size: 18px; }
.stat-label {
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-top: 6px;
  line-height: 1.45;
}

/* ---------- Work ---------- */
.project {
  display: grid;
  gap: 48px;
  align-items: center;
  margin-bottom: 56px;
}
.project.perci { grid-template-columns: 1fr 1.1fr; }
.project.caringly { grid-template-columns: 1.1fr 1fr; }
.shot {
  aspect-ratio: 4 / 3;
  border-radius: 3px;
  border: 1px solid var(--hairline);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}
.shot.perci { background-color: #e9f0ee; background-image: url('assets/perci-app.png'); }
.shot.caringly { background-color: #eef3fb; background-image: url('assets/caringly-app.png'); }
.project-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}
.project-title { font-size: 26px; font-weight: 600; }
.project-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
.project-body {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--body);
  margin: 14px 0 0;
}
.project .tags { margin-top: 18px; }

/* Mini stat strip (Caringly) */
.ministats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  margin-top: 20px;
  font-family: var(--mono);
}
.ministat { background: #fff; padding: 14px; }
.ministat-num { font-size: 20px; font-weight: 500; }
.ministat-label {
  font-size: 10px;
  color: var(--muted);
  margin-top: 3px;
  letter-spacing: .04em;
}

/* Two small cards */
.small-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.card {
  border: 1px solid var(--hairline);
  background: #fff;
  border-radius: 3px;
  overflow: hidden;
}
.card-media {
  display: block;
  aspect-ratio: 16 / 9;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}
.card-media.coradio { background-color: #000; background-image: url('assets/co-radio.png'); }
.card-media.mpulse { background-color: #fff; background-image: url('assets/mpulse.png'); }
.card-body { padding: 22px; }
.card-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.card-title { font-size: 18px; font-weight: 600; }
.card-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
}
.card-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--body);
  margin: 10px 0 0;
}
.read-link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  border-bottom: 1px solid #bcd2e2;
  padding-bottom: 1px;
}

/* ---------- Building Now ---------- */
.building-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 12px;
}
.building-caption { font-size: 13px; color: var(--muted); }
.building-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--body);
  max-width: 58ch;
  margin: 0 0 36px;
}
.g-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
.build-card {
  border: 1px solid var(--hairline);
  background: #fff;
  border-radius: 3px;
  overflow: hidden;
  display: block;
}
a.build-card:hover { border-color: var(--accent); }
.build-card.dashed { border: 1px dashed var(--dashed); background: #fbfcfd; }
.build-hero {
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.build-hero.arjuna { background: #0b1f2a; }
.build-hero.progress {
  background: repeating-linear-gradient(135deg, #eef1f4 0 12px, #e6ebf0 12px 24px);
}
.build-hero.site {
  background: var(--bg);
  border-bottom: 1px solid var(--hairline);
}
.arjuna-ring {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid #2f5468;
  display: flex;
  align-items: center;
  justify-content: center;
}
.arjuna-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--contact-accent); }
.build-hero-caption {
  position: absolute;
  bottom: 11px;
  left: 13px;
  font-family: var(--mono);
  font-size: 10px;
}
.build-hero.arjuna .build-hero-caption { color: #6f97ac; }
.build-hero.site .build-hero-caption { color: var(--faint); }
.progress-label { font-family: var(--mono); font-size: 11px; color: #8a939c; }
.site-url { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.build-body { padding: 20px; }
.build-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.build-card-title { font-size: 17px; font-weight: 600; }
.build-card-status { font-family: var(--mono); font-size: 11px; color: var(--accent); }
.build-card-status.soon { color: var(--faint); }
.build-text {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--body);
  margin: 10px 0 0;
}
.built-with {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.built-with-label {
  font-size: 9.5px;
  font-family: var(--mono);
  letter-spacing: .08em;
  color: var(--faint);
}
.pill {
  font-size: 10px;
  font-family: var(--mono);
  color: var(--accent);
  background: var(--accent-tint);
  padding: 3px 8px;
  border-radius: 2px;
}

/* ---------- Journey ---------- */
.era {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  padding: 34px 0;
  border-top: 1px solid var(--hairline);
}
.era:last-child { border-bottom: 1px solid var(--hairline); }
.era-period {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .04em;
}
.era-title {
  font-size: 21px;
  font-weight: 600;
  margin-top: 8px;
  line-height: 1.25;
}
.era-desc {
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.55;
}
.roles { display: flex; flex-direction: column; gap: 20px; }
.role { border-left: 2px solid var(--hairline); padding-left: 20px; }
.role.headline { border-left-color: var(--accent); }
.role-title { font-weight: 600; font-size: 16px; }
.role-org { font-weight: 400; color: var(--muted); font-size: 14px; }
.role-date {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--accent);
  margin-top: 3px;
}
.role-body {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--body);
  margin: 9px 0 0;
  max-width: 64ch;
}
.role-body.tight { margin-top: 6px; }

/* ---------- Writing ---------- */
.pub {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 28px;
  align-items: center;
  border-top: 1px solid var(--hairline);
  padding: 24px 0;
}
.pub:first-of-type { padding: 26px 0; }
.pub:hover { background: var(--bg-tint); }
.pub-year { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.pub-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  max-width: 66ch;
}
.pub-title.lead { font-size: 17px; }
.pub-cite {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
}
.pub-read {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  white-space: nowrap;
}
.pub-group {
  border-top: 1px solid var(--hairline);
  padding: 18px 0 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--faint);
}
.pub:last-of-type { border-bottom: 1px solid var(--hairline); }

/* ---------- About ---------- */
.about { background: var(--bg-tint); }
.about .g-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.about-pull {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 30px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 22ch;
}
.about-body { font-size: 15.5px; line-height: 1.78; color: #3a454f; }
.about-body p { margin: 0 0 18px; }
.about-body p:last-of-type { margin: 0; }
.credentials {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid #dde3e9;
}
.credentials-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
  margin-bottom: 14px;
}
.credentials-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 13.5px;
  color: var(--body);
}
.credentials-list strong { font-weight: 600; color: var(--ink); }
.credentials-list .extra { color: var(--muted); }

/* ---------- Contact (dark) ---------- */
.contact {
  padding: 84px 7vw 76px;
  background: var(--contact-bg);
  color: var(--contact-text);
}
.contact .eyebrow { color: var(--contact-accent); margin-bottom: 30px; display: block; }
.contact h2 {
  font-weight: 600;
  font-size: clamp(30px, 3.4vw, 46px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 20ch;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 52px;
  margin-top: 46px;
  align-items: start;
}
.contact-form { display: grid; gap: 13px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
.field {
  width: 100%;
  background: var(--contact-field-bg);
  border: 1px solid var(--contact-field-border);
  color: var(--contact-text);
  padding: 13px 15px;
  border-radius: 3px;
  font-size: 15px;
  outline: none;
}
textarea.field { resize: vertical; line-height: 1.6; }
.field:focus { border-color: var(--contact-accent); }
.send-btn {
  justify-self: start;
  font-size: 14px;
  background: var(--contact-accent);
  color: var(--contact-btn-text);
  border: none;
  padding: 13px 26px;
  border-radius: 3px;
  font-weight: 600;
  cursor: pointer;
}
.send-btn:hover { background: #9cc5da; }
.send-btn:disabled { opacity: .6; cursor: default; }
.form-confirm {
  border: 1px solid var(--contact-hairline);
  border-radius: 3px;
  padding: 26px;
  background: var(--contact-field-bg);
}
.form-confirm-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--contact-accent);
  margin-bottom: 10px;
}
.form-confirm-text { font-size: 15.5px; line-height: 1.62; color: #dfe5ea; }
.form-error {
  font-size: 13px;
  color: #e8a0a0;
  margin: 0;
  min-height: 0;
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
  font-family: var(--mono);
}
.contact-details a:hover { color: var(--contact-accent); }
.detail-label {
  font-size: 11px;
  letter-spacing: .1em;
  color: #7f8b96;
  margin-bottom: 6px;
}
.detail-value { font-size: 16px; }
.footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--contact-hairline);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: #6f7b86;
}

/* ============================================================
   Responsive — single breakpoint
   ============================================================ */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 34px; align-items: start; }
  .project.perci,
  .project.caringly,
  .small-cards,
  .g-3,
  .era,
  .about .g-2,
  .form-row,
  .contact-grid { grid-template-columns: 1fr; }
  /* Caringly is text-left/image-right on desktop; on mobile lead with the
     image so it matches Perci and the project cards (image-on-top). */
  .project.caringly .shot { order: -1; }
  .era { gap: 12px; padding-top: 26px; }
  .pub { grid-template-columns: 1fr; gap: 6px; }
  .pub-read { display: none; }

  /* Hamburger nav */
  .nav-toggle { display: flex; }
  .navlinks {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    font-size: 16px;
    background: var(--bg);
    border-bottom: 1px solid var(--hairline);
    box-shadow: 0 8px 16px rgba(26, 33, 41, .06);
    padding: 4px 7vw 12px;
  }
  .nav.open .navlinks { display: flex; }
  .navlinks a {
    padding: 12px 0;
    border-top: 1px solid var(--hairline);
  }
  .navlinks a:first-child { border-top: none; }
}