/* ==========================================================================
   Tridanta Clean Energy — stylesheet
   ========================================================================== */

:root {
  /* palette */
  --ink: #0A1F16;
  --ink-2: #0F2A1E;
  --ink-3: #123425;
  --green: #17B26A;
  --green-2: #0E9F5C;
  --green-light: #7CF5B6;
  --amber: #F2A93C;
  --paper: #F7FAF8;
  --paper-2: #EEF3EF;
  --white: #FFFFFF;
  --text: #16241D;
  --text-mute: #5B6E64;
  --text-on-dark: #E7F3EC;
  --text-on-dark-mute: #A9C2B4;
  --border: #E1E9E4;
  --border-dark: rgba(255,255,255,0.10);

  /* type */
  --font-display: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* misc */
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 50px -20px rgba(10, 31, 22, 0.25);
  --shadow-sm: 0 8px 24px -12px rgba(10, 31, 22, 0.18);
  --ease: cubic-bezier(.16,.84,.44,1);
  --nav-h: 82px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
h1, h2, h3, h4, h5 { font-family: var(--font-display); line-height: 1.15; margin: 0; color: var(--text); font-weight: 700; }
p { margin: 0; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--green); color: #fff;
  padding: 10px 18px; z-index: 10000; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- preloader ---------- */
.preloader {
  position: fixed; inset: 0; z-index: 99999; background: var(--ink);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .6s var(--ease), visibility .6s var(--ease);
}
.preloader.is-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader__mark { display: flex; gap: 8px; }
.preloader__mark span {
  width: 12px; height: 12px; border-radius: 50%; background: var(--green);
  animation: bounce 1s var(--ease) infinite;
}
.preloader__mark span:nth-child(2) { animation-delay: .12s; background: var(--green-light); }
.preloader__mark span:nth-child(3) { animation-delay: .24s; background: var(--amber); }
@keyframes bounce { 0%, 80%, 100% { transform: translateY(0); opacity: .6; } 40% { transform: translateY(-14px); opacity: 1; } }

/* ---------- reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(28px); }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.no-js [data-reveal] { opacity: 1; transform: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 28px; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  border: 1.5px solid transparent; transition: all .3s var(--ease); white-space: nowrap;
}
.btn i { font-size: .85em; transition: transform .3s var(--ease); }
.btn:hover i { transform: translateX(4px); }
.btn--primary { background: var(--green); color: #04150D; }
.btn--primary:hover { background: var(--green-2); box-shadow: 0 12px 30px -10px rgba(23,178,106,.55); transform: translateY(-2px); }
.btn--ghost { background: transparent; border-color: rgba(255,255,255,.35); color: var(--text-on-dark); }
.btn--ghost:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.6); }
.btn--sm { padding: 10px 20px; font-size: .85rem; }
.btn--lg { padding: 18px 36px; font-size: 1.05rem; }
.btn--block { width: 100%; }

/* ---------- typography helpers ---------- */
.eyebrow {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green-2); font-weight: 600; margin-bottom: 14px; display: block;
}
.eyebrow--light { color: var(--green-light); }
.text-accent { color: var(--green-2); }
.section--dark .text-accent, .hero .text-accent { color: var(--green-light); }

/* ---------- navbar ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 20px 0; transition: all .35s var(--ease);
  background: transparent;
}
.navbar.is-scrolled {
  padding: 12px 0; background: rgba(10, 31, 22, 0.85); backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 10px 30px -18px rgba(0,0,0,.5);
}
.navbar__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand__logo { height: 40px; width: auto; display: block; }

.nav-links { display: flex; align-items: center; gap: clamp(14px, 1.6vw, 26px); }
.nav-link { font-size: .89rem; font-weight: 500; color: var(--text-on-dark-mute); position: relative; padding: 6px 0; transition: color .25s; white-space: nowrap; }
.nav-link::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--green);
  transition: width .3s var(--ease);
}
.nav-link:hover, .nav-link.is-active { color: var(--text-on-dark); }
.nav-link:hover::after, .nav-link.is-active::after { width: 100%; }

.navbar__actions { display: flex; align-items: center; gap: 18px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 8px; z-index: 1001; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text-on-dark); border-radius: 2px; transition: all .3s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay { position: fixed; inset: 0; background: rgba(4,11,8,.6); backdrop-filter: blur(2px); z-index: 998; opacity: 0; visibility: hidden; transition: all .3s; }
.nav-overlay.is-active { opacity: 1; visibility: visible; }

/* ---------- hero ---------- */
.hero { position: relative; min-height: min(100vh, 880px); display: flex; flex-direction: column; justify-content: center; padding-top: var(--nav-h); overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: 0; background: var(--ink); overflow: hidden; }
.hero__bg img, .hero__bg video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center 45%;
}
.hero__overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(5, 15, 11, .82) 0%, rgba(5, 15, 11, .52) 40%, rgba(5, 15, 11, .3) 65%, rgba(5, 15, 11, .18) 100%),
    linear-gradient(180deg, rgba(5, 15, 11, .05) 0%, rgba(5, 15, 11, .12) 55%, rgba(5, 15, 11, .55) 100%);
}
.hero__inner { position: relative; z-index: 2; padding-top: 60px; padding-bottom: 60px; max-width: 880px; }
.hero__title { font-size: clamp(2.4rem, 5.6vw, 4.4rem); color: var(--text-on-dark); font-weight: 800; letter-spacing: -.02em; margin-bottom: 24px; text-shadow: 0 4px 24px rgba(0,0,0,.4); }
.hero__subtitle { font-size: 1.13rem; line-height: 1.7; color: var(--text-on-dark-mute); max-width: 700px; margin-bottom: 40px; text-shadow: 0 2px 16px rgba(0,0,0,.45); }
.hero__actions { display: flex; gap: 18px; flex-wrap: wrap; }

.hero__stats { position: relative; z-index: 2; border-top: 1px solid var(--border-dark); padding: 34px 0; }
.hero__stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { display: flex; flex-direction: column; gap: 4px; text-align: left; }
.stat__num { font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 800; color: var(--green-light); }
.stat__label { font-size: .82rem; color: var(--text-on-dark-mute); font-weight: 500; }

.scroll-cue {
  position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%); z-index: 3;
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border-dark);
  display: flex; align-items: center; justify-content: center; color: var(--text-on-dark-mute);
  animation: floatY 2.2s ease-in-out infinite;
}
@keyframes floatY { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 8px); } }

/* ---------- sections ---------- */
.section { padding: 120px 0; position: relative; }
.section--tint { background: var(--paper-2); }
.section--dark {
  background: linear-gradient(175deg, var(--ink) 0%, var(--ink-2) 100%);
  color: var(--text-on-dark);
}
.section--dark h2, .section--dark h3, .section--dark h4, .section--dark h5 { color: var(--text-on-dark); }
.section--dark p { color: var(--text-on-dark-mute); }
.section--dark .eyebrow { color: var(--green-light); }

.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); letter-spacing: -.01em; margin-bottom: 18px; }
.section-lede { font-size: 1.08rem; line-height: 1.7; color: var(--text-mute); }
.section-statement {
  font-family: var(--font-display); font-size: 1.35rem; line-height: 1.6; font-weight: 600;
  max-width: 900px; margin: 64px 0; color: var(--text);
}
.subhead { font-size: 1.4rem; margin: 56px 0 28px; }
.subhead span { color: var(--green-2); font-weight: 700; }
.divider { height: 1px; background: var(--border); margin: 80px 0; }

/* ---------- grids ---------- */
.grid { display: grid; gap: 24px; margin-top: 8px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid + .grid { margin-top: 24px; }
.grid--3, .grid--4 { margin-bottom: 56px; }
.grid--2 { margin-bottom: 56px; }

/* promoter chips */
.promoter-row { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 56px; }
.promoter-chip {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 20px; border-radius: 999px;
  background: var(--white); border: 1px solid var(--border); font-size: .88rem; font-weight: 600; box-shadow: var(--shadow-sm);
}
.promoter-chip i { color: var(--green-2); }

/* pillar cards */
.pillar-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 26px; position: relative; transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.pillar-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.pillar-card__num { font-family: var(--font-mono); font-size: .78rem; color: var(--text-mute); }
.pillar-card__icon { display: block; font-size: 1.6rem; color: var(--green-2); margin: 16px 0 14px; }
.pillar-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.pillar-card p { color: var(--text-mute); font-size: .93rem; line-height: 1.6; }

/* value chain */
.value-chain {
  display: flex; align-items: stretch; gap: 0; background: var(--ink); border-radius: var(--radius);
  padding: 8px; margin: 20px 0 0; overflow-x: auto;
}
.value-chain__step {
  flex: 1; min-width: 190px; padding: 26px 22px; border-radius: 12px; transition: background .3s;
}
.value-chain__step:hover { background: rgba(255,255,255,.05); }
.value-chain__step h4 { color: var(--green-light); font-size: 1rem; margin-bottom: 6px; }
.value-chain__step p { color: var(--text-on-dark-mute); font-size: .82rem; }
.value-chain__arrow { align-self: center; color: var(--green); flex-shrink: 0; padding: 0 6px; }

/* lifecycle timeline */
.lifecycle { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; margin-top: 12px; }
.lifecycle__item { border-top: 3px solid var(--green); padding-top: 18px; }
.lifecycle__dot {
  display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%;
  background: var(--ink); color: var(--green-light); font-family: var(--font-mono); font-size: .8rem; margin-bottom: 12px;
}
.lifecycle__item h4 { font-size: .95rem; margin-bottom: 6px; }
.lifecycle__item p { font-size: .82rem; color: var(--text-mute); line-height: 1.55; }

/* tabs (EPCM/LSTK) */
.tabs { margin-bottom: 60px; }
.tabs__nav { display: inline-flex; background: rgba(255,255,255,.06); border-radius: 999px; padding: 6px; margin-bottom: 28px; }
.tabs__btn {
  border: none; background: transparent; color: var(--text-on-dark-mute); padding: 12px 28px; border-radius: 999px;
  font-weight: 600; font-size: .92rem; transition: all .3s var(--ease);
}
.tabs__btn.is-active { background: var(--green); color: #04150D; }
.tabs__panel { display: none; background: rgba(255,255,255,.05); border: 1px solid var(--border-dark); border-radius: var(--radius); padding: 36px; }
.tabs__panel.is-active { display: block; }
.tabs__panel h3 { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; font-size: 1.25rem; color: var(--green-light); }
.tabs__panel p { line-height: 1.7; font-size: 1rem; }

/* process rail (8 steps) */
.process-rail {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 56px;
}
.process-rail__step {
  background: rgba(255,255,255,.04); border: 1px solid var(--border-dark); border-radius: var(--radius-sm);
  padding: 22px 20px; transition: all .3s var(--ease);
}
.process-rail__step:hover { background: rgba(255,255,255,.08); border-color: rgba(124,245,182,.4); }
.process-rail__step span { font-family: var(--font-mono); color: var(--green-light); font-size: .82rem; }
.process-rail__step h4 { font-size: .95rem; margin: 10px 0 6px; }
.process-rail__step p { font-size: .82rem; }

/* mini cards */
.mini-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 26px 22px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.section--dark .mini-card { background: rgba(255,255,255,.05); border-color: var(--border-dark); }
.mini-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.mini-card i { color: var(--green-2); font-size: 1.3rem; margin-bottom: 12px; display: block; }
.section--dark .mini-card i { color: var(--green-light); }
.mini-card h4 { font-size: .98rem; margin-bottom: 8px; }
.mini-card p { font-size: .85rem; color: var(--text-mute); line-height: 1.6; }
.section--dark .mini-card p { color: var(--text-on-dark-mute); }

/* flow steps (pretreatment) */
.flow-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 40px; }
.flow-steps__item {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 22px;
  position: relative;
}
.flow-steps__n {
  display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%;
  background: var(--ink); color: var(--green-light); font-family: var(--font-mono); font-weight: 600; margin-bottom: 16px;
}
.flow-steps__item h4 { font-size: 1rem; margin-bottom: 8px; }
.flow-steps__item p { font-size: .87rem; color: var(--text-mute); line-height: 1.6; }

/* callouts */
.callout {
  display: flex; align-items: flex-start; gap: 16px; background: rgba(23,178,106,.08); border: 1px solid rgba(23,178,106,.28);
  border-radius: var(--radius-sm); padding: 22px 26px; margin: 24px 0 48px;
}
.callout i { color: var(--green-2); font-size: 1.2rem; margin-top: 2px; }
.callout p { font-size: .96rem; line-height: 1.6; color: var(--text); }
.section--dark .callout p { color: var(--text-on-dark); }
.callout--warn { background: rgba(242,169,60,.09); border-color: rgba(242,169,60,.3); }
.callout--warn i { color: var(--amber); }

/* detail cards */
.detail-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 28px;
}
.detail-card--dark { background: rgba(255,255,255,.05); border-color: var(--border-dark); }
.detail-card h4 { display: flex; align-items: center; gap: 12px; font-size: 1.05rem; margin-bottom: 10px; }
.detail-card h4 i { color: var(--green-2); }
.detail-card--dark h4 i { color: var(--green-light); }
.detail-card p { color: var(--text-mute); line-height: 1.65; font-size: .93rem; }
.detail-card--dark p { color: var(--text-on-dark-mute); }

/* icon cards (gas upgrading grid) */
.icon-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 30px 24px;
  text-align: left; transition: transform .3s var(--ease), border-color .3s;
}
.icon-card:hover { transform: translateY(-5px); border-color: var(--green); }
.icon-card i { font-size: 1.5rem; color: var(--green-2); margin-bottom: 16px; display: block; }
.icon-card h4 { font-size: 1rem; margin-bottom: 8px; }
.icon-card p { font-size: .87rem; color: var(--text-mute); line-height: 1.6; }
.icon-card--dark { background: rgba(255,255,255,.05); border-color: var(--border-dark); }
.icon-card--dark i { color: var(--green-light); }
.icon-card--dark p { color: var(--text-on-dark-mute); }

/* feed cards */
.feed-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 34px 26px;
  text-align: center;
}
.feed-card i { font-size: 1.8rem; color: var(--green-2); margin-bottom: 18px; display: block; }
.feed-card h4 { font-size: 1.05rem; margin-bottom: 10px; }
.feed-card p { font-size: .88rem; color: var(--text-mute); }

/* stepper (5 step design principle) */
.stepper { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; margin-bottom: 48px; }
.stepper__item { text-align: left; padding: 20px 18px; border-left: 3px solid var(--green); background: var(--white); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.stepper__item span { font-family: var(--font-mono); color: var(--green-2); font-size: .8rem; }
.stepper__item h5 { font-size: .92rem; margin: 8px 0 6px; }
.stepper__item p { font-size: .8rem; color: var(--text-mute); line-height: 1.5; }

/* tables */
.table-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; margin-bottom: 24px; }
.table-card h4 { margin-bottom: 18px; font-size: 1.05rem; }
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; min-width: 480px; }
.data-table th, .data-table td { text-align: left; padding: 13px 16px; font-size: .9rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table th { font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-mute); font-weight: 600; }
.data-table tbody tr:hover { background: var(--paper-2); }
.table-note { font-size: .82rem; color: var(--text-mute); margin-top: 14px; line-height: 1.6; }

/* project swiper */
.project-swiper { padding-bottom: 50px; margin-bottom: 12px; }
.project-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; height: 100%;
  min-height: 220px; display: flex; flex-direction: column; box-shadow: var(--shadow-sm);
}
.project-card__tag {
  align-self: flex-start; background: var(--ink); color: var(--green-light); font-family: var(--font-mono);
  font-size: .74rem; padding: 6px 14px; border-radius: 999px; margin-bottom: 16px;
}
.project-card h4 { font-size: 1.1rem; margin-bottom: 6px; }
.project-card__feed { font-size: .82rem; color: var(--green-2); font-weight: 600; margin-bottom: 12px; }
.project-card p:last-child { font-size: .88rem; color: var(--text-mute); line-height: 1.6; }
.swiper-pagination-bullet { background: var(--text-mute); opacity: .4; }
.swiper-pagination-bullet-active { background: var(--green-2); opacity: 1; }
.swiper-nav-buttons { display: flex; justify-content: center; gap: 14px; margin-bottom: 60px; }
.swiper-btn {
  width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--border); background: var(--white);
  display: flex; align-items: center; justify-content: center; color: var(--text); transition: all .3s var(--ease);
}
.swiper-btn:hover { background: var(--green); color: #04150D; border-color: var(--green); }

/* portfolio explorer */
.portfolio { background: var(--paper-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 44px; margin-top: 16px; }
.portfolio__head { display: flex; justify-content: space-between; gap: 40px; margin-bottom: 32px; flex-wrap: wrap; }
.portfolio__head h3 { font-size: 1.5rem; margin: 6px 0 14px; }
.portfolio__stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 34px; flex-shrink: 0; }
.portfolio__stats div { text-align: left; }
.portfolio__stats strong { display: block; font-family: var(--font-display); font-size: 1.5rem; color: var(--green-2); }
.portfolio__stats span { font-size: .78rem; color: var(--text-mute); }

.portfolio__controls { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; margin-bottom: 22px; }
.portfolio__tabs { display: inline-flex; background: var(--white); border: 1px solid var(--border); border-radius: 999px; padding: 5px; }
.portfolio__tab { border: none; background: transparent; padding: 10px 20px; border-radius: 999px; font-size: .84rem; font-weight: 600; color: var(--text-mute); transition: all .25s; }
.portfolio__tab.is-active { background: var(--ink); color: var(--green-light); }
.portfolio__search { position: relative; flex: 1; min-width: 240px; max-width: 340px; }
.portfolio__search i { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-mute); font-size: .85rem; }
.portfolio__search input {
  width: 100%; padding: 12px 16px 12px 40px; border-radius: 999px; border: 1px solid var(--border);
  font-size: .88rem; background: var(--white);
}
.portfolio__search input:focus { outline: none; border-color: var(--green); }
.portfolio__table-wrap { max-height: 480px; overflow-y: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--white); }
.portfolio__table-wrap .data-table th { position: sticky; top: 0; background: var(--white); z-index: 1; }

/* loop diagram */
.loop-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 50px; margin-bottom: 60px; }
.loop-col__label { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--text-on-dark-mute); margin-bottom: 16px; }
.loop-chain { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.loop-chain i { color: var(--green); font-size: .8rem; }
.loop-node {
  width: 100%; text-align: center; padding: 14px 18px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,.06); border: 1px solid var(--border-dark); font-weight: 600; font-size: .9rem;
  color: var(--text-on-dark);
}
.loop-node--accent { background: var(--green); color: #04150D; border-color: var(--green); }
.loop-node--outline { background: transparent; border: 1px dashed var(--green-light); color: var(--green-light); }

/* why cards */
.why-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 26px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.why-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.why-card i { font-size: 1.6rem; color: var(--green-2); margin-bottom: 16px; display: block; }
.why-card h4 { font-size: 1.05rem; margin-bottom: 8px; }
.why-card p { font-size: .88rem; color: var(--text-mute); line-height: 1.6; }

/* expert cards */
#experts .grid--3 { gap: 32px; align-items: stretch; }
.expert-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px 32px 36px;
  text-align: center;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
}
.expert-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--green), var(--green-light));
  transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease);
}
.expert-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 34px 64px -26px rgba(10, 31, 22, .28);
  border-color: rgba(23, 178, 106, .35);
}
.expert-card:hover::before { transform: scaleX(1); }
.expert-card__photo {
  width: 132px; height: 132px; border-radius: 50%; margin: 0 auto 26px; overflow: hidden; flex-shrink: 0;
  box-shadow: 0 0 0 5px var(--white), 0 0 0 8px rgba(23, 178, 106, .22), 0 22px 32px -14px rgba(10, 31, 22, .3);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}
.expert-card:hover .expert-card__photo {
  transform: scale(1.045);
  box-shadow: 0 0 0 5px var(--white), 0 0 0 8px rgba(23, 178, 106, .4), 0 26px 40px -14px rgba(10, 31, 22, .35);
}
.expert-card__photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.expert-card h3 { font-size: 1.2rem; font-weight: 800; letter-spacing: -.01em; margin-bottom: 10px; }
.expert-card__role {
  display: inline-block; font-family: var(--font-mono); font-size: .68rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase; color: var(--green-2);
  background: rgba(23, 178, 106, .09); border: 1px solid rgba(23, 178, 106, .22);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 20px;
}
.expert-card__bio {
  font-size: .92rem; color: var(--text-mute); line-height: 1.7; margin-bottom: 26px;
  flex-grow: 1;
}
.expert-card__social { display: flex; justify-content: center; gap: 12px; margin-top: auto; }
.expert-card__social a {
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border); display: flex;
  align-items: center; justify-content: center; color: var(--text-mute); transition: all .3s var(--ease);
}
.expert-card__social a:hover {
  background: var(--green); color: #04150D; border-color: var(--green);
  transform: translateY(-3px); box-shadow: 0 12px 22px -10px rgba(23, 178, 106, .55);
}

/* CTA */
.cta { position: relative; padding: 110px 0; overflow: hidden; }
.cta__bg { position: absolute; inset: 0; z-index: 0; }
.cta__bg img { width: 100%; height: 100%; object-fit: cover; }
.cta__bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(6,18,13,.94), rgba(15,42,30,.88)); }
.cta__inner { position: relative; z-index: 1; text-align: center; max-width: 720px; }
.cta__inner h2 { color: var(--white); font-size: clamp(1.8rem, 3.6vw, 2.6rem); margin-bottom: 18px; }
.cta__inner p { color: var(--text-on-dark-mute); font-size: 1.08rem; margin-bottom: 34px; line-height: 1.6; }

/* contact */
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-info__item {
  display: flex; align-items: flex-start; gap: 18px; background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 22px; transition: all .3s var(--ease);
}
a.contact-info__item:hover { border-color: var(--green); transform: translateX(4px); }
.contact-info__item i { color: var(--green-2); font-size: 1.2rem; width: 24px; text-align: center; margin-top: 3px; }
.contact-info__item span { display: block; font-size: .78rem; color: var(--text-mute); margin-bottom: 4px; }
.contact-info__item strong { font-size: .98rem; font-weight: 600; line-height: 1.4; }

.contact-form { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-size: .84rem; font-weight: 600; margin-bottom: 8px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  font-size: .93rem; background: var(--paper); transition: border-color .25s;
  resize: vertical;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: none; border-color: var(--green); background: var(--white); }
.form-error { display: none; color: #D2483A; font-size: .78rem; margin-top: 6px; }
.form-field.has-error input, .form-field.has-error textarea { border-color: #D2483A; }
.form-field.has-error .form-error { display: block; }
.form-note { font-size: .78rem; color: var(--text-mute); text-align: center; margin-top: 14px; }
.form-note.is-success { color: var(--green-2); font-weight: 600; }

/* footer */
.footer { background: var(--ink); color: var(--text-on-dark-mute); padding: 80px 0 0; }
.footer__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 60px; border-bottom: 1px solid var(--border-dark); }
.footer__brand p { margin-top: 18px; line-height: 1.7; font-size: .9rem; max-width: 340px; }
.footer__promoted { font-size: .8rem !important; margin-top: 10px !important; color: var(--text-on-dark-mute); opacity: .8; }
.footer__social { display: flex; gap: 12px; margin-top: 22px; }
.footer__social a {
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--border-dark); display: flex;
  align-items: center; justify-content: center; transition: all .3s;
}
.footer__social a:hover { background: var(--green); color: #04150D; border-color: var(--green); }
.footer__col { display: flex; flex-direction: column; gap: 14px; }
.footer__col h5 { color: var(--text-on-dark); font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 6px; }
.footer__col a { font-size: .9rem; transition: color .25s; display: flex; align-items: center; gap: 8px; }
.footer__col a:hover { color: var(--green-light); }
.footer__bottom {
  display: flex; justify-content: space-between; gap: 20px; padding: 26px 0; font-size: .8rem; flex-wrap: wrap;
}
.footer__attribution { opacity: .7; max-width: 480px; text-align: right; }
.footer__credit { border-top: 1px solid var(--border-dark); padding: 18px 0; text-align: center; }
.footer__credit p { font-size: .78rem; color: var(--text-on-dark-mute); opacity: .8; }

/* back to top */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px; width: 48px; height: 48px; border-radius: 50%;
  background: var(--green); color: #04150D; border: none; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 26px -8px rgba(23,178,106,.6); opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .3s var(--ease); z-index: 900; font-size: 1rem;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }

/* consultation fab */
.consult-fab {
  position: fixed; top: 46%; right: 0; transform: translateY(-50%);
  display: flex; align-items: center; gap: 10px;
  background: var(--green); color: #04150D; border: none;
  padding: 16px 20px 16px 18px; border-radius: 14px 0 0 14px;
  font-family: var(--font-display); font-weight: 700; font-size: .88rem;
  box-shadow: -10px 10px 28px -12px rgba(10, 31, 22, .45);
  cursor: pointer; z-index: 850; transition: all .35s var(--ease);
}
.consult-fab i { font-size: 1.05rem; }
.consult-fab:hover { background: var(--green-2); padding-right: 30px; box-shadow: -12px 14px 34px -12px rgba(10, 31, 22, .55); }

/* consultation drawer */
.drawer-overlay {
  position: fixed; inset: 0; background: rgba(4, 11, 8, .55); backdrop-filter: blur(2px);
  opacity: 0; visibility: hidden; transition: all .35s var(--ease); z-index: 1200;
}
.drawer-overlay.is-active { opacity: 1; visibility: visible; }

.consult-drawer {
  position: fixed; top: 0; right: 0; height: 100vh; width: min(460px, 92vw);
  background: var(--white); z-index: 1300;
  box-shadow: -24px 0 70px -20px rgba(0, 0, 0, .35);
  transform: translateX(100%); transition: transform .45s var(--ease);
  display: flex; flex-direction: column; padding: 36px 34px 30px;
  overflow-y: auto;
}
.consult-drawer.is-open { transform: translateX(0); }
.consult-drawer__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.consult-drawer__head h3 { font-size: 1.35rem; letter-spacing: -.01em; }
.consult-drawer__close {
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--border); background: none;
  display: flex; align-items: center; justify-content: center; color: var(--text-mute); flex-shrink: 0;
  transition: all .25s var(--ease);
}
.consult-drawer__close:hover { background: var(--paper-2); color: var(--text); border-color: var(--border); transform: rotate(90deg); }
.consult-drawer__desc { color: var(--text-mute); font-size: .93rem; line-height: 1.65; margin-bottom: 30px; }
.consult-drawer .contact-form { border: none; padding: 0; }
.consult-drawer .form-field { margin-bottom: 18px; }

body.drawer-open { overflow: hidden; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1100px) {
  .lifecycle { grid-template-columns: repeat(3, 1fr); row-gap: 34px; }
  .process-rail { grid-template-columns: repeat(2, 1fr); }
  .stepper { grid-template-columns: repeat(3, 1fr); row-gap: 22px; }
  .loop-grid { grid-template-columns: 1fr; gap: 40px; }
  .portfolio__head { flex-direction: column; }
}

@media (max-width: 980px) {
  .nav-links {
    position: fixed; top: 0; right: 0; height: 100vh; width: min(340px, 82vw);
    background: var(--ink-2); flex-direction: column; align-items: flex-start; justify-content: flex-start;
    padding: 110px 32px 40px; gap: 26px; transform: translateX(100%); transition: transform .4s var(--ease); z-index: 999;
  }
  .nav-links.is-open { transform: translateX(0); }
  .nav-toggle { display: flex; }
  .navbar__actions .btn--sm { display: none; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .hero__stats-grid { grid-template-columns: repeat(2, 1fr); row-gap: 26px; }
  .value-chain { flex-direction: column; }
  .value-chain__arrow { transform: rotate(90deg); padding: 6px 0; align-self: flex-start; margin-left: 22px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .hero { min-height: 78vh; }
  .section { padding: 80px 0; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .lifecycle { grid-template-columns: 1fr 1fr; }
  .process-rail { grid-template-columns: 1fr; }
  .stepper { grid-template-columns: 1fr 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; text-align: left; }
  .footer__attribution { text-align: left; }
  .portfolio { padding: 26px; }
  .portfolio__stats { grid-template-columns: 1fr 1fr; }
  .hero__stats-grid { grid-template-columns: 1fr 1fr; }
  .cta { padding: 80px 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .lifecycle { grid-template-columns: 1fr; }
  .stepper { grid-template-columns: 1fr; }
  .portfolio__stats { grid-template-columns: 1fr; }
  .btn--lg { padding: 15px 26px; font-size: .95rem; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .expert-card { padding: 40px 24px 30px; }
  .expert-card__photo { width: 112px; height: 112px; }
  .consult-fab span { display: none; }
  .consult-fab { padding: 14px; border-radius: 50% 0 0 50%; top: 42%; }
  .consult-drawer { padding: 28px 22px 24px; }
}