/* =========================================================
   MAHABOOB BASHA J — EXECUTIVE PORTFOLIO
   Design tokens
   ========================================================= */
:root{
  /* Palette — "field ledger" direction: sustainability green + brass, not the default cream/terracotta */
  --ink:        #0B1F1C;   /* deep green-black, dark surface base   */
  --ink-soft:   #123028;   /* elevated dark surface                  */
  --ink-line:   #1E4137;   /* dark hairlines                         */
  --paper:      #F2F4EE;   /* pale sage-white, light surface base    */
  --paper-soft: #FFFFFF;   /* elevated light surface                 */
  --paper-line: #DCE1D6;   /* light hairlines                        */
  --moss:       #3E6B54;   /* primary accent — deep sustainable green*/
  --moss-deep:  #2C4F3E;
  --brass:      #B8893F;   /* secondary accent — muted gold           */
  --brass-soft: #D8B679;
  --slate:      #5B6B66;   /* muted secondary text (light mode)      */
  --slate-dark: #9FB3AC;   /* muted secondary text (dark mode)       */

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 26px;

  --ease: cubic-bezier(.22,.68,0,1);

  /* live theme variables, reassigned per data-theme */
  --bg: var(--paper);
  --surface: var(--paper-soft);
  --line: var(--paper-line);
  --text: #16241F;
  --text-muted: var(--slate);
  --accent: var(--moss);
}

html[data-theme="dark"]{
  --bg: var(--ink);
  --surface: var(--ink-soft);
  --line: var(--ink-line);
  --text: #EAF1EC;
  --text-muted: var(--slate-dark);
  --accent: var(--brass-soft);
}

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

body{
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
  transition: background .5s var(--ease), color .5s var(--ease);
}

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

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

h1,h2,h3{ font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; color: var(--text); }

.container{ max-width: 1220px; }

/* focus visibility for accessibility */
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--brass);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =========================================================
   Background contour field — signature ambient texture
   ========================================================= */
.contour-field{
  position: fixed; inset: 0; z-index: 0;
  overflow: hidden; pointer-events: none;
  opacity: .5;
}
.contour-field svg{ width: 100%; height: 100%; }
.contour-line{
  fill: none;
  stroke: var(--moss);
  stroke-width: 1.1;
  opacity: .16;
}
html[data-theme="dark"] .contour-line{ stroke: var(--brass-soft); opacity: .14; }
.c1{ animation: driftA 42s ease-in-out infinite; }
.c2{ animation: driftB 54s ease-in-out infinite; }
.c3{ animation: driftA 60s ease-in-out infinite reverse; }
.c4{ animation: driftB 48s ease-in-out infinite reverse; }
@keyframes driftA{
  0%,100%{ transform: translate(0,0); }
  50%{ transform: translate(-2%, 1.5%); }
}
@keyframes driftB{
  0%,100%{ transform: translate(0,0); }
  50%{ transform: translate(2%, -1.5%); }
}

main, .site-nav, .site-footer, .hero{ position: relative; z-index: 1; }

/* =========================================================
   Navigation
   ========================================================= */
.site-nav{
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
  transition: background .4s var(--ease);
}
.nav-inner{
  max-width: 1220px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.brand-mark{ display: flex; align-items: center; gap: 12px; }
.brand-glyph{
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 600; font-size: .95rem;
  background: linear-gradient(155deg, var(--moss), var(--moss-deep));
  color: #fff; letter-spacing: .02em;
}
.brand-glyph.small{ width: 44px; height: 44px; font-size: 1rem; }
.brand-text{ font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; letter-spacing: .01em; }

.nav-links{ display: flex; align-items: center; gap: 28px; }
.nav-links a[data-nav]{
  font-size: .86rem; font-weight: 500; color: var(--text-muted);
  position: relative; padding: 4px 0;
  transition: color .25s var(--ease);
}
.nav-links a[data-nav]::after{
  content:''; position: absolute; left:0; right: 100%; bottom: -2px; height: 1px;
  background: var(--accent); transition: right .3s var(--ease);
}
.nav-links a[data-nav]:hover{ color: var(--text); }
.nav-links a[data-nav]:hover::after,
.nav-links a[data-nav].active::after{ right: 0; }
.nav-links a[data-nav].active{ color: var(--text); }

.theme-toggle{
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  display: grid; place-items: center; cursor: pointer;
  transition: transform .3s var(--ease), background .3s;
}
.theme-toggle:hover{ transform: rotate(18deg); }

.btn-nav-cta{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border-radius: 100px;
  background: var(--moss); color: #fff; font-size: .82rem; font-weight: 600;
  transition: background .25s var(--ease), transform .25s var(--ease);
}
.btn-nav-cta:hover{ background: var(--moss-deep); transform: translateY(-2px); color: #fff; }

.nav-toggle{ display: none; background: none; border: none; width: 34px; height: 26px; position: relative; cursor: pointer; }
.nav-toggle span{ position: absolute; left: 0; right: 0; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s var(--ease); }
.nav-toggle span:nth-child(1){ top: 0; }
.nav-toggle span:nth-child(2){ top: 12px; }
.nav-toggle span:nth-child(3){ top: 24px; }

/* =========================================================
   Hero
   ========================================================= */
.hero{
  min-height: 92vh; display: flex; align-items: center;
  padding: 120px 0 60px;
}
.hero-grid{
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: center;
}
.eyebrow{
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--moss); margin-bottom: 22px;
}
html[data-theme="dark"] .eyebrow{ color: var(--brass-soft); }
.eyebrow-dot{ width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 4px color-mix(in srgb, currentColor 25%, transparent); }

.hero-title{
  font-size: clamp(2.6rem, 4.6vw, 4rem);
  line-height: 1.06; margin-bottom: 26px; color: var(--text);
}
.hero-title em{ font-style: italic; color: var(--moss); }
html[data-theme="dark"] .hero-title em{ color: var(--brass-soft); }

.hero-sub{
  font-size: 1.12rem; color: var(--text-muted); max-width: 540px; margin-bottom: 34px;
}

.hero-actions{ display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 36px; }

.btn-executive{
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 26px; border-radius: 100px;
  background: var(--ink); color: #fff; font-weight: 600; font-size: .92rem;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s;
  box-shadow: 0 8px 24px -10px rgba(11,31,28,.5);
}
html[data-theme="dark"] .btn-executive{ background: var(--brass); color: var(--ink); box-shadow: 0 8px 24px -10px rgba(184,137,63,.4);}
.btn-executive:hover{ transform: translateY(-3px); color: #fff; }
html[data-theme="dark"] .btn-executive:hover{ color: var(--ink); }

.btn-ghost{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 15px 8px; font-weight: 600; font-size: .92rem; color: var(--text);
  border-bottom: 1px solid var(--line);
  transition: gap .3s var(--ease), border-color .3s;
}
.btn-ghost:hover{ gap: 14px; color: var(--text); border-color: var(--accent); }

.hero-tags{ display: flex; flex-wrap: wrap; gap: 10px 22px; }
.hero-tags span{ font-size: .82rem; color: var(--text-muted); display: inline-flex; align-items: center; gap: 8px; }
.hero-tags i{ color: var(--moss); font-size: .74rem; }
html[data-theme="dark"] .hero-tags i{ color: var(--brass-soft); }

/* Ledger card — signature element */
.hero-ledger{ perspective: 1200px; }
.ledger-card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  box-shadow: 0 30px 70px -30px rgba(11,31,28,.28);
  transform: rotate(1.2deg);
  transition: transform .5s var(--ease);
}
.ledger-card:hover{ transform: rotate(0deg) translateY(-4px); }
.ledger-head{ display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 22px; border-bottom: 1px dashed var(--line); padding-bottom: 16px; }
.ledger-label{ font-family: var(--font-display); font-style: italic; font-size: 1.15rem; }
.ledger-stamp{ font-family: var(--font-mono); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); border: 1px solid var(--line); padding: 4px 10px; border-radius: 100px; }

.ledger-list{ list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 20px; }
.ledger-list li{ display: flex; align-items: baseline; gap: 16px; }
.lg-num{ font-family: var(--font-mono); font-weight: 600; font-size: 1.7rem; color: var(--moss); min-width: 100px; font-variant-numeric: tabular-nums; }
html[data-theme="dark"] .lg-num{ color: var(--brass-soft); }
.lg-txt{ font-size: .88rem; color: var(--text-muted); }
.ledger-foot{ margin-top: 24px; padding-top: 18px; border-top: 1px dashed var(--line); font-size: .82rem; color: var(--text-muted); display: flex; align-items: center; gap: 8px; }
.ledger-foot i{ color: var(--moss); }
html[data-theme="dark"] .ledger-foot i{ color: var(--brass-soft); }

.scroll-cue{
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 1.5px solid var(--line); border-radius: 100px;
  display: flex; justify-content: center; padding-top: 8px;
}
.scroll-cue span{ width: 4px; height: 8px; border-radius: 4px; background: var(--moss); animation: scrollDown 1.8s ease-in-out infinite; }
html[data-theme="dark"] .scroll-cue span{ background: var(--brass-soft); }
@keyframes scrollDown{ 0%{ transform: translateY(0); opacity: 1;} 70%{ transform: translateY(14px); opacity: 0;} 100%{ opacity: 0; } }

/* =========================================================
   Sections — shared
   ========================================================= */
.section{ padding: 118px 0; }
.section-alt{ background: color-mix(in srgb, var(--surface) 60%, transparent); }

.section-eyebrow{
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--moss); margin-bottom: 16px;
}
html[data-theme="dark"] .section-eyebrow{ color: var(--brass-soft); }
.section-eyebrow.light{ color: rgba(255,255,255,.75); }

.section-title{ font-size: clamp(1.9rem, 3vw, 2.6rem); line-height: 1.16; margin-bottom: 0; }
.section-head{ max-width: 720px; margin: 0 auto 64px; text-align: left; }
.section-desc{ margin-top: 18px; color: var(--text-muted); font-size: 1.02rem; max-width: 620px; }

.lead-copy{ font-size: 1.2rem; line-height: 1.7; color: var(--text); margin-bottom: 22px; }
.body-copy{ color: var(--text-muted); font-size: 1rem; margin-bottom: 18px; }

.about-chips{ display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.chip{
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 18px; border-radius: 100px; border: 1px solid var(--line);
  font-size: .83rem; color: var(--text-muted); background: var(--surface);
}
.chip i{ color: var(--moss); }
html[data-theme="dark"] .chip i{ color: var(--brass-soft); }

/* =========================================================
   KPI cards
   ========================================================= */
.kpi-grid{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.kpi-card{
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 30px 26px; transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.kpi-card:hover{ transform: translateY(-6px); box-shadow: 0 24px 50px -28px rgba(11,31,28,.35); border-color: var(--accent); }
.kpi-icon{ font-size: 1.3rem; color: var(--moss); margin-bottom: 18px; }
html[data-theme="dark"] .kpi-icon{ color: var(--brass-soft); }
.kpi-value{ font-family: var(--font-mono); font-size: 2.2rem; font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; margin-bottom: 8px; }
.kpi-label{ font-weight: 600; font-size: .96rem; margin-bottom: 6px; }
.kpi-note{ font-size: .82rem; color: var(--text-muted); }

/* =========================================================
   Competency cards
   ========================================================= */
.comp-card{
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 32px 28px; height: 100%;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.comp-card:hover{ transform: translateY(-6px); box-shadow: 0 24px 50px -28px rgba(11,31,28,.35); }
.comp-icon{
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(155deg, var(--moss), var(--moss-deep)); color: #fff; font-size: 1.15rem; margin-bottom: 20px;
}
html[data-theme="dark"] .comp-icon{ background: linear-gradient(155deg, var(--brass), var(--brass-soft)); color: var(--ink); }
.comp-card h3{ font-size: 1.15rem; margin-bottom: 16px; }
.comp-card ul{ list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.comp-card li{ font-size: .88rem; color: var(--text-muted); padding-left: 18px; position: relative; }
.comp-card li::before{ content:''; position: absolute; left: 0; top: 8px; width: 7px; height: 1.5px; background: var(--moss); }
html[data-theme="dark"] .comp-card li::before{ background: var(--brass-soft); }

/* =========================================================
   Timeline
   ========================================================= */
.timeline{ position: relative; padding-left: 40px; }
.timeline::before{
  content:''; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--moss), transparent 98%);
  opacity: .35;
}
html[data-theme="dark"] .timeline::before{ background: linear-gradient(var(--brass-soft), transparent 98%); }

.tl-item{ position: relative; margin-bottom: 44px; }
.tl-item:last-child{ margin-bottom: 0; }
.tl-marker{
  position: absolute; left: -40px; top: 8px; width: 17px; height: 17px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--moss);
}
html[data-theme="dark"] .tl-marker{ border-color: var(--brass-soft); }
.tl-marker::after{ content:''; position: absolute; inset: 3px; border-radius: 50%; background: var(--moss); }
html[data-theme="dark"] .tl-marker::after{ background: var(--brass-soft); }

.tl-card{
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 30px 32px; transition: box-shadow .35s var(--ease), transform .35s var(--ease);
}
.tl-card:hover{ box-shadow: 0 24px 50px -28px rgba(11,31,28,.3); transform: translateY(-3px); }
.tl-dates{ font-family: var(--font-mono); font-size: .78rem; letter-spacing: .04em; color: var(--moss); text-transform: uppercase; margin-bottom: 10px; }
html[data-theme="dark"] .tl-dates{ color: var(--brass-soft); }
.tl-card h3{ font-size: 1.28rem; margin-bottom: 8px; }
.tl-org{ font-size: .92rem; color: var(--text-muted); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.tl-org i{ color: var(--moss); }
html[data-theme="dark"] .tl-org i{ color: var(--brass-soft); }
.tl-desc{ font-size: .95rem; color: var(--text-muted); margin-bottom: 18px; max-width: 780px; }
.tl-tags{ display: flex; flex-wrap: wrap; gap: 10px; }
.tl-tags span{
  font-size: .78rem; color: var(--text); background: color-mix(in srgb, var(--moss) 10%, transparent);
  padding: 7px 14px; border-radius: 100px; display: inline-flex; align-items: center; gap: 7px;
}
html[data-theme="dark"] .tl-tags span{ background: color-mix(in srgb, var(--brass-soft) 14%, transparent); }
.tl-tags i{ color: var(--moss); font-size: .7rem; }
html[data-theme="dark"] .tl-tags i{ color: var(--brass-soft); }

/* =========================================================
   Achievement cards
   ========================================================= */
.ach-card{
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 32px 28px; height: 100%;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.ach-card:hover{ transform: translateY(-6px); box-shadow: 0 24px 50px -28px rgba(11,31,28,.35); border-color: var(--accent); }
.ach-icon{ font-size: 1.6rem; color: var(--brass); margin-bottom: 20px; display: block; }
html[data-theme="dark"] .ach-icon{ color: var(--brass-soft); }
.ach-card h3{ font-size: 1.1rem; margin-bottom: 12px; }
.ach-card p{ font-size: .9rem; color: var(--text-muted); margin: 0; }

/* =========================================================
   Education cards
   ========================================================= */
.edu-card{
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 28px 24px; height: 100%; position: relative;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.edu-card:hover{ transform: translateY(-6px); box-shadow: 0 24px 50px -28px rgba(11,31,28,.3); }
.edu-icon{ font-size: 1.4rem; color: var(--moss); margin-bottom: 16px; }
html[data-theme="dark"] .edu-icon{ color: var(--brass-soft); }
.edu-status{
  position: absolute; top: 24px; right: 20px; font-family: var(--font-mono); font-size: .66rem;
  letter-spacing: .04em; text-transform: uppercase; padding: 4px 10px; border-radius: 100px;
}
.status-done{ background: color-mix(in srgb, var(--moss) 14%, transparent); color: var(--moss); }
.status-progress{ background: color-mix(in srgb, var(--brass) 16%, transparent); color: var(--brass); }
html[data-theme="dark"] .status-done{ color: var(--brass-soft); background: color-mix(in srgb, var(--brass-soft) 16%, transparent); }
html[data-theme="dark"] .status-progress{ color: var(--brass-soft); background: color-mix(in srgb, var(--brass-soft) 20%, transparent); }
.edu-card h3{ font-size: 1.08rem; margin-bottom: 8px; }
.edu-card p{ font-size: .85rem; color: var(--text-muted); margin-bottom: 4px; }
.edu-org{ font-weight: 600; color: var(--text); }

.cert-strip{ display: flex; flex-wrap: wrap; gap: 14px; }
.cert-pill{
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 20px; border-radius: 100px; border: 1px dashed var(--line);
  font-size: .85rem; color: var(--text-muted);
}
.cert-pill i{ color: var(--brass); }
html[data-theme="dark"] .cert-pill i{ color: var(--brass-soft); }

/* =========================================================
   Tag cloud (leadership/expertise)
   ========================================================= */
.tag-cloud{ display: flex; flex-wrap: wrap; gap: 14px; }
.tag-lg{
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 22px; border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--surface); font-size: .92rem; font-weight: 500;
  transition: transform .3s var(--ease), background .3s var(--ease), color .3s;
}
.tag-lg i{ color: var(--moss); }
html[data-theme="dark"] .tag-lg i{ color: var(--brass-soft); }
.tag-lg:hover{ transform: translateY(-4px); background: var(--moss); color: #fff; }
.tag-lg:hover i{ color: #fff; }

/* =========================================================
   CTA band
   ========================================================= */
.cta-band{
  background: linear-gradient(135deg, var(--moss-deep), var(--ink));
  padding: 80px 0; color: #fff;
}
.cta-inner{ display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2{ color: #fff; font-size: clamp(1.6rem, 2.6vw, 2.1rem); max-width: 560px; margin: 0; }
.btn-inverse{ background: #fff; color: var(--ink) !important; }
.btn-inverse:hover{ background: var(--brass-soft); color: var(--ink) !important; }

/* =========================================================
   Contact cards
   ========================================================= */
.contact-card{
  display: flex; flex-direction: column; gap: 10px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 28px 24px; height: 100%;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .3s;
}
.contact-card:hover{ transform: translateY(-6px); box-shadow: 0 24px 50px -28px rgba(11,31,28,.3); border-color: var(--accent); }
.contact-card i{ font-size: 1.3rem; color: var(--moss); }
html[data-theme="dark"] .contact-card i{ color: var(--brass-soft); }
.contact-label{ font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.contact-value{ font-weight: 600; font-size: .95rem; word-break: break-word; }
.contact-card-static{ cursor: default; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer{ background: var(--ink); color: #EAF1EC; padding-top: 64px; }
.footer-inner{ display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 30px; padding-bottom: 44px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-brand{ display: flex; align-items: center; gap: 16px; }
.footer-name{ font-family: var(--font-display); font-weight: 600; font-size: 1.1rem; margin: 0; }
.footer-role{ font-size: .82rem; color: rgba(234,241,236,.65); margin: 2px 0 0; max-width: 320px; }
.footer-links{ display: flex; gap: 28px; }
.footer-links a{ font-size: .88rem; color: rgba(234,241,236,.75); transition: color .25s; }
.footer-links a:hover{ color: #fff; }
.footer-social{ display: flex; gap: 14px; }
.footer-social a{
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,.18);
  display: grid; place-items: center; transition: background .25s, transform .25s;
}
.footer-social a:hover{ background: var(--brass); transform: translateY(-3px); }
.footer-bottom{ padding: 22px 0; text-align: center; font-size: .8rem; color: rgba(234,241,236,.55); }

/* Back to top */
#backToTop{
  position: fixed; bottom: 28px; right: 28px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%; border: none;
  background: var(--moss); color: #fff; font-size: 1rem;
  display: grid; place-items: center; cursor: pointer;
  opacity: 0; transform: translateY(14px); pointer-events: none;
  transition: opacity .35s var(--ease), transform .35s var(--ease), background .3s;
  box-shadow: 0 14px 30px -12px rgba(11,31,28,.5);
}
#backToTop.show{ opacity: 1; transform: translateY(0); pointer-events: auto; }
#backToTop:hover{ background: var(--moss-deep); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 991px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero{ padding-top: 130px; }
  .kpi-grid{ grid-template-columns: repeat(2, 1fr); }
  .nav-links{
    position: fixed; top: 68px; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: flex-start; gap: 4px;
    padding: 20px 24px 26px; transform: translateY(-130%); opacity: 0;
    transition: transform .35s var(--ease), opacity .35s var(--ease);
  }
  .nav-links.open{ transform: translateY(0); opacity: 1; }
  .nav-links a[data-nav]{ padding: 12px 0; width: 100%; border-bottom: 1px solid var(--line); }
  .nav-toggle{ display: block; }
  .theme-toggle{ margin-top: 12px; }
  .btn-nav-cta{ margin-top: 12px; }
}

@media (max-width: 576px){
  .section{ padding: 84px 0; }
  .kpi-grid{ grid-template-columns: 1fr; }
  .timeline{ padding-left: 30px; }
  .tl-marker{ left: -30px; }
  .tl-card{ padding: 24px 20px; }
  .cta-inner{ flex-direction: column; align-items: flex-start; }
}