/* ─────────────────────────────────────────────
   guerlainnerestan.com
   Apple-grade minimalism. White, black, breath.
   ───────────────────────────────────────────── */

:root{
  --bg:        #FFFFFF;
  --bg-grey:   #F5F5F7;        /* Apple's standard section grey */
  --ink:       #1D1D1F;        /* Apple's text colour */
  --ink-2:     #6E6E73;        /* Apple's secondary text */
  --ink-3:     #86868B;        /* Apple's tertiary */
  --line:      #D2D2D7;        /* Apple's hairline */
  --signal:    #1F8A4C;
  --link:      #1D1D1F;

  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display",
             "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --text:    -apple-system, BlinkMacSystemFont, "SF Pro Text",
             "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --max:     980px;
  --max-nav: 1180px;
}

*{ box-sizing: border-box; }
html, body{ margin: 0; padding: 0; }

html{
  background: var(--bg);
  color: var(--ink);
  font-family: var(--text);
  font-size: 17px;
  line-height: 1.47;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
  letter-spacing: -.003em;
}

::selection{ background: var(--ink); color: var(--bg); }

a{
  color: inherit;
  text-decoration: none;
}

img{ max-width: 100%; display: block; }

/* ─────────── NAV ─────────── */
.nav{
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, .06);
}
.nav-inner{
  max-width: var(--max-nav);
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: 52px;
}
.nav-mark{
  color: var(--ink);
  font-family: var(--display);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -.005em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 24px;
}
.nav-mark-letters{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .02em;
}
.nav-links{
  display: flex;
  gap: 28px;
  font-size: 13px;
  color: var(--ink);
  font-weight: 400;
}
.nav-links a{
  color: var(--ink-2);
  transition: color .15s;
}
.nav-links a:hover{ color: var(--ink); }
.nav-status{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-2);
}
.nav-status .dot{
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal);
}

/* ─────────── HERO ─────────── */
.hero{
  padding: 88px 32px 40px;
  background: var(--bg);
}
.hero-inner{
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-eyebrow{
  margin: 0 0 56px;
  text-align: center;
}
.eyebrow{
  margin: 0 0 24px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.eyebrow.centered{ text-align: center; }

/* identity: photo + name as one centered horizontal unit */
.hero-identity{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(28px, 4vw, 56px);
  margin-bottom: 72px;
}
.portrait{
  margin: 0;
  width: clamp(180px, 22vw, 260px);
  aspect-ratio: 4 / 5;
  background: var(--bg-grey);
  border-radius: 18px;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}
.portrait img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(.02) contrast(1.02);
}
.portrait.portrait-empty::before{
  content: "drop portrait.jpg";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink-3);
  text-transform: uppercase;
  z-index: 2;
  padding: 0 12px;
  text-align: center;
}
.portrait.portrait-empty::after{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(135deg, transparent 49%, rgba(0,0,0,.05) 49%, rgba(0,0,0,.05) 51%, transparent 51%);
  background-size: 14px 14px;
}
.display-name{
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(64px, 9.5vw, 124px);
  line-height: .9;
  letter-spacing: -.045em;
  color: var(--ink);
  text-align: left;
}
.display-name span{ display: block; }

/* copy block: warm story + crisp facts + CTA */
.hero-copy{
  max-width: 640px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-story{
  margin: 0 0 20px;
  font-family: var(--display);
  font-size: clamp(19px, 1.7vw, 23px);
  line-height: 1.5;
  color: var(--ink);
  letter-spacing: -.012em;
  font-weight: 400;
  text-align: center;
  max-width: 56ch;
}
.hero-story strong{
  color: var(--ink);
  font-weight: 600;
}
.hero-story + .hero-story{
  margin-top: 0;
}

/* schools row: 3 wordmarks centered with hairline rules */
.hero-schools{
  margin: 56px auto;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  width: 100%;
  max-width: 880px;
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  gap: clamp(24px, 4vw, 56px);
  flex-wrap: wrap;
}
.school-logo{
  display: block;
  height: clamp(60px, 7vw, 88px);
  width: auto;
  max-width: 240px;
  object-fit: contain;
  opacity: .92;
  transition: opacity .2s ease;
  flex-shrink: 0;
}
.school-logo:hover{ opacity: 1; }

.hero-link{
  margin: 0 auto;
}

/* ─────────── LINK ARROW ─────────── */
.link-arrow{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--text);
  font-size: 15px;
  color: var(--ink);
  font-weight: 400;
  letter-spacing: -.005em;
  position: relative;
  padding-bottom: 2px;
}
.link-arrow::after{
  content: "→";
  display: inline-block;
  transition: transform .25s cubic-bezier(.4,0,.2,1);
}
.link-arrow:hover::after{ transform: translateX(4px); }

/* ─────────── STATEMENT ─────────── */
.statement{
  padding: 32px 32px 40px;
  background: var(--bg);
  text-align: center;
}
.statement-inner{
  max-width: 920px;
  margin: 0 auto;
}
.statement-text{
  margin: 0 auto;
  max-width: 980px;
  font-family: var(--display);
  font-size: clamp(30px, 4.4vw, 60px);
  line-height: 1.16;
  letter-spacing: -.03em;
  font-weight: 600;
  color: var(--ink);
  text-wrap: balance;
}
.statement-text strong{
  color: var(--ink);
  font-weight: 600;
}
.statement-text .muted{
  color: var(--ink-3);
  font-weight: 600;
}

/* breakdown: 4-cell stat grid below the statement */
.breakdown{
  margin: 96px auto 0;
  max-width: 800px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.bd{
  padding: 36px 16px;
  text-align: center;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.bd:last-child{ border-right: 0; }
.bd-icon{
  width: 24px;
  height: 24px;
  color: var(--ink-2);
  margin-bottom: 6px;
}
.bd-icon-sigma{
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  line-height: 1;
  color: var(--ink-3);
}
.bd-num{
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1;
  letter-spacing: -.028em;
  color: var(--ink);
}
.bd-lbl{
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: .06em;
  text-transform: uppercase;
  font-weight: 500;
}
.bd-total .bd-lbl{
  color: var(--ink-2);
  font-weight: 600;
}
.statement-text strong{
  color: var(--ink);
  font-weight: 600;
}

/* ─────────── STARTUPS LOGO BAR ─────────── */
.startups{
  padding: 8px 32px 16px;
  background: var(--bg);
  text-align: center;
}
.startups-inner{
  max-width: 1080px;
  margin: 0 auto;
}
.startups-inner .eyebrow{
  margin-bottom: 40px;
}
.startups-row{
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: clamp(32px, 6vw, 72px);
  padding: 48px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.startup-cell{
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
  min-width: 200px;
  gap: 28px;
}
.startup-pair{
  gap: 32px;
}
.startup-link{
  display: inline-flex;
  align-items: center;
  transition: opacity .2s ease;
}
.startup-link:hover{ opacity: .6; }
.startup-logo{
  display: block;
  height: clamp(40px, 5vw, 58px);
  width: auto;
  opacity: .9;
  flex-shrink: 0;
}
.startup-logo-sm{
  height: clamp(34px, 4vw, 46px);
  opacity: .85;
}
.startup-link:hover .startup-logo{ opacity: 1; }

/* ─────────── MODULES ─────────── */
.modules{
  background: var(--bg);
}
.module{
  padding: 96px 32px 120px;
}
.startups + .modules .module:first-child{
  padding-top: 64px;
}
.module-light{ background: var(--bg); }
.module-grey{ background: var(--bg-grey); }

.module-inner{
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
}
.module-eyebrow{
  margin: 0 0 32px;
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: -.005em;
  font-weight: 500;
}
.module-eyebrow-lg{
  font-size: clamp(15px, 1.4vw, 18px);
  font-weight: 500;
  color: var(--ink-2);
  letter-spacing: -.003em;
  margin-bottom: 40px;
}
.module-eyebrow-lg strong{
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0;
}
.module-title{
  margin: 0 0 24px;
  font-family: var(--display);
  font-size: clamp(56px, 9vw, 132px);
  line-height: 1;
  letter-spacing: -.04em;
  font-weight: 600;
  color: var(--ink);
}

/* brand row: logo + small chip badge (e.g. YC), centered */
.module-brand{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 2.4vw, 32px);
  margin: 0 auto 28px;
  flex-wrap: wrap;
}
.module-brand-mark{
  display: inline-block;
  transition: opacity .2s;
}
.module-brand-mark:hover{ opacity: .65; }
.module-logo{
  display: block;
  height: clamp(64px, 10vw, 124px);
  width: auto;
  max-width: 100%;
}
.module-logo-wide{
  height: clamp(72px, 11vw, 140px);
}
.yc-badge{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -.005em;
  text-decoration: none;
  transition: border-color .2s, color .2s, background .2s, opacity .2s;
  white-space: nowrap;
  align-self: center;
}
.yc-badge:hover{
  border-color: var(--ink);
  color: var(--ink);
}
.module-grey .yc-badge{ background: var(--bg-grey); }

/* yc badge with image variant — uses the official logo */
.yc-badge-logo{
  padding: 6px 14px 6px 6px;
  gap: 10px;
}
.yc-badge-img{
  display: block;
  height: 28px;
  width: 28px;
  border-radius: 6px;
  object-fit: contain;
}
.yc-badge-text{
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink);
}

.module-sub{
  margin: 0 auto 64px;
  max-width: 36ch;
  font-family: var(--display);
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.25;
  letter-spacing: -.012em;
  font-weight: 500;
  color: var(--ink-2);
}
.module-row{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  max-width: 720px;
  margin: 0 auto 64px;
}
.module-metric{
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.module-metric-num{
  font-family: var(--display);
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1;
  letter-spacing: -.025em;
  font-weight: 600;
  color: var(--ink);
}
.module-metric-lbl{
  font-size: 13px;
  color: var(--ink-2);
  font-weight: 400;
  letter-spacing: -.005em;
}

/* bullets: detailed proof points below metrics */
.module-bullets{
  list-style: none;
  margin: 64px auto 0;
  padding: 0;
  max-width: 680px;
  text-align: left;
}
.module-bullets li{
  position: relative;
  padding: 22px 0 22px 28px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-2);
  letter-spacing: -.005em;
}
.module-bullets li:last-child{ border-bottom: 1px solid var(--line); }
.module-bullets li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 32px;
  width: 14px;
  height: 1px;
  background: var(--ink-3);
}
.module-bullets strong{
  color: var(--ink);
  font-weight: 600;
}
.module-bullets em{
  font-style: italic;
  color: var(--ink);
  font-weight: 500;
}

/* ─────────── NUMBERS ─────────── */
.numbers{
  padding: 56px 32px 96px;
  background: var(--bg);
  text-align: center;
}
.numbers-inner{
  max-width: var(--max);
  margin: 0 auto;
}
.numbers-grid{
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.num{
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}
.num-value{
  font-family: var(--display);
  font-size: clamp(48px, 6.4vw, 84px);
  line-height: 1;
  letter-spacing: -.035em;
  font-weight: 600;
  color: var(--ink);
}
.num-label{
  font-size: 14px;
  color: var(--ink-2);
  font-weight: 500;
}

/* achievements list inside the Numbers section */
.achievements{
  max-width: 800px;
  margin: 88px auto 0;
}
.achievements-title{
  font-family: var(--display);
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 600;
  letter-spacing: -.018em;
  color: var(--ink);
  margin: 0 0 40px;
  text-align: center;
  line-height: 1.18;
}
.achievements-list{
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: left;
}
.achievements-list li{
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 24px 4px;
  border-top: 1px solid var(--line);
  font-size: clamp(18px, 1.6vw, 21px);
  line-height: 1.55;
  color: var(--ink-2);
  letter-spacing: -.008em;
}
.achievements-list li:last-child{
  border-bottom: 1px solid var(--line);
}
.achievements-list li::before{ content: none; }
.achievements-list .emoji{
  font-size: 1.2em;
  line-height: 1;
  flex-shrink: 0;
  display: inline-block;
  width: 1.5em;
  text-align: center;
}
.achievements-list strong{
  color: var(--ink);
  font-weight: 700;
}

/* ─────────── BACKGROUND ─────────── */
.background{
  padding: 56px 32px 96px;
  background: var(--bg);
}
.background-inner{
  max-width: var(--max);
  margin: 0 auto;
}
.background-list{
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}
.background-list li{
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 32px;
  align-items: baseline;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.background-list li:last-child{ border-bottom: 0; }
.bg-year{
  font-size: 14px;
  color: var(--ink-3);
  font-weight: 500;
}
.bg-id{
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}
.bg-logo{
  display: block;
  height: clamp(52px, 5.5vw, 72px);
  width: auto;
  max-width: 140px;
  object-fit: contain;
  flex-shrink: 0;
  opacity: .92;
}
.bg-title{
  font-family: var(--display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -.015em;
  color: var(--ink);
  min-width: 0;
}
.bg-meta{
  font-size: 14px;
  color: var(--ink-2);
}

/* languages — small subsection inside Background */
.languages{
  margin-top: 32px;
  padding: 24px 0 4px;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  align-items: baseline;
}
.languages-label{
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 500;
}
.languages-list{
  font-family: var(--display);
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -.01em;
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 16px;
}
.lang{
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}
.lang em{
  font-family: var(--text);
  font-size: 12px;
  font-weight: 500;
  font-style: normal;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.lang-sep{
  color: var(--ink-3);
  font-weight: 400;
}

/* ─────────── FOOTER ─────────── */
.ftr{
  background: var(--bg-grey);
  padding: 120px 32px 80px;
}
.ftr-inner{
  max-width: var(--max);
  margin: 0 auto;
}
.ftr-line{
  margin: 0 0 56px;
  font-family: var(--display);
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.1;
  letter-spacing: -.025em;
  font-weight: 600;
  color: var(--ink);
  max-width: 18ch;
}
.ftr-rows{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}
.ftr-cta{
  font-family: var(--display);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -.012em;
  color: var(--ink);
}
.ftr-cta:hover{ text-decoration: underline; text-underline-offset: 4px; }
.ftr-links{
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 14px;
  color: var(--ink-2);
}
.ftr-link{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-2);
  text-decoration: none;
  transition: color .15s ease;
}
.ftr-link:hover{ color: var(--ink); }
.ftr-link svg{
  width: 18px;
  height: 18px;
  display: block;
  flex-shrink: 0;
}
.ftr-link-cal{
  padding: 6px 12px 6px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 500;
  transition: border-color .15s, background .15s;
}
.ftr-link-cal:hover{
  border-color: var(--ink);
  background: var(--bg);
}
.ftr-copy{
  margin: 32px 0 0;
  font-size: 12px;
  color: var(--ink-3);
}

/* ─────────── RESPONSIVE ─────────── */
@media (max-width: 900px){
  .nav-inner{ padding: 12px 20px; gap: 20px; }
  .nav-links{ display: none; }

  .hero{ padding: 48px 20px 88px; }
  .hero-eyebrow{ margin-bottom: 36px; }
  .hero-identity{
    flex-direction: column;
    align-items: center;
    gap: 28px;
    margin-bottom: 56px;
  }
  .portrait{ width: clamp(160px, 44vw, 220px); }
  .display-name{ text-align: center; }
  .hero-story{ font-size: 18px; }
  .hero-schools{
    margin: 40px 0 40px;
    padding: 28px 0;
    gap: 28px;
  }
  .school-logo{ height: 28px; }

  .statement{ padding: 64px 20px 72px; }
  .breakdown{
    grid-template-columns: repeat(2, 1fr);
    margin-top: 56px;
  }
  .startups{ padding: 40px 20px 64px; }
  .startups-row{
    flex-direction: column;
    gap: 36px;
    padding: 36px 0;
  }
  .startup-cell{ min-width: 0; width: 100%; }
  .startup-pair{ flex-direction: column; gap: 16px; }
  .bd{ padding: 28px 12px; }
  .bd:nth-child(2){ border-right: 0; }
  .bd:nth-child(1), .bd:nth-child(2){ border-bottom: 1px solid var(--line); }

  .module{ padding: 96px 20px; }
  .module-row{ grid-template-columns: 1fr; gap: 40px; max-width: 320px; }
  .module-sub{ margin-bottom: 56px; }

  .numbers{ padding: 96px 20px; }
  .numbers-grid{ grid-template-columns: repeat(2, 1fr); gap: 48px 24px; }

  .background{ padding: 96px 20px; }
  .background-list li{
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 24px 0;
  }

  .ftr{ padding: 80px 20px 64px; }
  .ftr-rows{ flex-direction: column; gap: 24px; }
}