/* ============================================================
   GenShift Energy — Web layer
   Extends claude/genshift-tokens.css (the deck-derived source of truth).
   Load tokens FIRST, then this file.

   What this adds that the deck tokens don't cover:
   the band rhythm, the three background modes as CSS, the nav/footer,
   the form, and the responsive behaviour.
   ============================================================ */

:root {
  /* Band rhythm — the anti-density control. One idea per band. */
  --gs-band-pad-y:   clamp(48px, 3.5vw, 96px);
  --gs-band-pad-y-sm:clamp(32px, 4vw, 64px);
  --gs-maxw:         1340px;
  --gs-maxw-text:    62ch;      /* never let body copy run wider */
  --gs-header-h:     76px;

  /* Fluid type — overrides the deck's fixed desktop sizes */
  --gs-fs-h1:      clamp(2.15rem, 1.15rem + 3.6vw, 3.75rem);
  --gs-fs-h2:      clamp(1.6rem,  1.15rem + 1.7vw, 2.4rem);
  --gs-fs-sub:     clamp(1rem,    0.95rem + 0.3vw, 1.15rem);
  --gs-fs-body:    clamp(0.94rem, 0.9rem  + 0.2vw, 1rem);
  --gs-fs-stat:    clamp(2.4rem,  1.4rem  + 3.4vw, 4rem);

  --gs-ease: cubic-bezier(.22,.61,.36,1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--gs-header-h) + 16px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--gs-ink);
  color: var(--gs-text);
  font: var(--gs-w-body) var(--gs-fs-body)/var(--gs-leading-body) var(--gs-font);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Layout primitives ---------- */

.gs-band {
  position: relative;
  padding: var(--gs-band-pad-y) var(--gs-pad);
  background: var(--gs-ink);
  overflow: clip;                 /* contains the glow */
}
.gs-band--tight { padding-block: var(--gs-band-pad-y-sm); }
.gs-band__inner { max-width: var(--gs-maxw); margin-inline: auto; position: relative; z-index: 1; }

/* The header block, exactly as the deck stacks it: eyebrow → headline → sub */
.gs-head { max-width: 100%; margin-bottom: clamp(32px, 4vw, 56px); }
@media (min-width: 861px) {
  .gs-head { max-width: 75%; }
  .gs-band--photo .gs-head { max-width: 45%; }
}
.gs-head .gs-eyebrow { display: block; margin-bottom: 18px; }
.gs-head .gs-headline { margin: 0 0 16px; font-size: var(--gs-fs-h2); }
.gs-head .gs-sub { margin: 0; max-width: var(--gs-maxw-text); margin-inline: inherit; }
.gs-head--wide { max-width: 60ch; }

/* Kicker — the single bold line the deck puts under every card row */
.gs-kicker {
  margin-top: clamp(28px, 3.5vw, 44px);
  color: var(--gs-text-muted);
  font-size: var(--gs-fs-sub);
}
.gs-kicker strong { color: var(--gs-text); font-weight: var(--gs-w-title); }
.gs-kicker strong.accent { color: var(--gs-signal); }

/* ---------- The three background modes ---------- */

/* 1 · Photo hero — full-bleed image, ink scrim from the left so text always reads */
.gs-band--photo {
  background: var(--gs-ink) center/cover no-repeat;
  padding-inline: 0;  /* full-bleed — no side padding */
  min-height: calc(60vh + 200px + var(--gs-header-h));
  display: flex; align-items: center;
}
.gs-band--photo .gs-band__inner {
  padding-inline: var(--gs-pad);  /* content still padded */
  width: 100%;
  display: flex; align-items: center;
}
/* Scrim removed — baked into hero images */
.gs-band--short {
  min-height: calc((60vh + 200px + var(--gs-header-h)) / 2);
  padding-top: calc(var(--gs-header-h) + 3.5rem) !important;
}

/* 2 · Glow-right — the content workhorse. CSS gradient, no image needed. */
.gs-band--glow::before {
  content: ""; position: absolute; z-index: 0;
  inset-block: -20%; right: -14%; width: 62%;
  background:
    radial-gradient(58% 46% at 72% 42%, rgba(57,224,122,.19) 0%, rgba(57,224,122,0) 68%),
    radial-gradient(42% 34% at 86% 62%, rgba(20,148,100,.22) 0%, rgba(20,148,100,0) 70%);
  pointer-events: none;
}

/* 3 · Ring — single-concept bands (digital twin, the close) */
.gs-band--ring::before {
  content: ""; position: absolute; z-index: 0;
  left: 50%; top: 50%; translate: -50% -50%;
  width: min(760px, 82vw); aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(57,224,122,.14) 0%, rgba(57,224,122,0) 62%);
  pointer-events: none;
}

/* ---------- Cards ---------- */

.gs-grid { display: grid; gap: var(--gs-gap); }
.gs-grid--2 { grid-template-columns: repeat(2, 1fr); }
.gs-grid--3 { grid-template-columns: repeat(3, 1fr); }
.gs-grid--4 { grid-template-columns: repeat(4, 1fr); }
.gs-grid--5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 1080px) {
  .gs-grid--4, .gs-grid--5 { grid-template-columns: repeat(2, 1fr); }
  .gs-grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .gs-grid--2, .gs-grid--3, .gs-grid--4, .gs-grid--5 { grid-template-columns: 1fr; }
}

.gs-card {
  background: color-mix(in srgb, var(--gs-surface) 92%, transparent);
  border: 1px solid var(--gs-line);
  border-radius: var(--gs-radius);
  padding: clamp(20px, 2.2vw, 28px);
  display: flex; flex-direction: column; gap: 12px;
}
.gs-card__icon { width: 56px; height: 56px; flex: none; }
.gs-card__title { font: var(--gs-w-title) 1.05rem/1.25 var(--gs-font); color: var(--gs-signal); margin: 0; }
.gs-card__title--plain { color: var(--gs-text); }
.gs-card__meta { font: var(--gs-w-eyebrow) var(--gs-fs-caption)/1.3 var(--gs-font);
  text-transform: uppercase; letter-spacing: .1em; color: var(--gs-text-muted); }
.gs-card__body { margin: 0; color: var(--gs-text-muted); }
.gs-card--feature { background: var(--gs-green); border-color: var(--gs-green); }
.gs-card--feature .gs-card__title, .gs-card--feature .gs-card__body { color: #fff; }
.gs-card--feature .gs-card__meta { color: #D6F5E4; }

/* Warm = negative. Only ever to name a constraint. */
.gs-card--constraint { background: var(--gs-constraint); border-color: var(--gs-constraint); }
.gs-card--constraint .gs-card__title { color: #fff; }
.gs-card--constraint .gs-card__body { color: var(--gs-constraint-text); }

/* ---------- Stat band (the water-comparison pattern from the deck) ---------- */
.gs-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(24px, 3vw, 48px); align-items: start;
  background: color-mix(in srgb, var(--gs-surface) 92%, transparent);
  border: 1px solid var(--gs-line); border-radius: var(--gs-radius);
  padding: clamp(24px, 3vw, 40px); }
.gs-stat__value { font: var(--gs-w-headline) var(--gs-fs-stat)/1 var(--gs-font); color: var(--gs-signal); }
.gs-stat__value--alt { color: var(--gs-risk); font-size: calc(var(--gs-fs-stat) * .62); }
.gs-stat__label { margin-top: 12px; font: var(--gs-w-eyebrow) var(--gs-fs-caption)/1.4 var(--gs-font);
  text-transform: uppercase; letter-spacing: .1em; color: var(--gs-text-muted); }
.gs-stat__note { margin-top: 4px; font-weight: var(--gs-w-title); color: var(--gs-text); }

/* ---------- Steps (numbered process) ---------- */
.gs-step__num { font: var(--gs-w-eyebrow) var(--gs-fs-caption)/1 var(--gs-font);
  letter-spacing: .1em; color: var(--gs-signal); }

/* ---------- Split (text + visual) ---------- */
.gs-split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 4vw, 64px); align-items: center; }
.gs-split--narrow { grid-template-columns: 1.15fr .85fr; }
@media (max-width: 900px) { .gs-split, .gs-split--narrow { grid-template-columns: 1fr; } }
.gs-split__media img, .gs-split__media svg { width: 100%; height: auto; border-radius: var(--gs-radius); display: block; }

/* ---------- Buttons ---------- */
.gs-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; border-radius: 999px; border: 1px solid transparent;
  font: var(--gs-w-title) 0.95rem/1 var(--gs-font); text-decoration: none;
  background: var(--gs-signal); color: #05231A;
  transition: transform .18s var(--gs-ease), background .18s var(--gs-ease);
}
.gs-btn:hover { background: var(--gs-green-hi); transform: translateY(-1px); }
.gs-btn--ghost { background: transparent; color: var(--gs-text); border-color: var(--gs-line); }
.gs-btn--ghost:hover { background: var(--gs-surface); border-color: var(--gs-signal); }
.gs-btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--gs-signal); outline-offset: 3px;
}

/* ---------- Header / nav ---------- */
.gs-header {
  position: sticky; top: 0; z-index: 50; height: var(--gs-header-h);
  padding-inline: var(--gs-pad);
  background: transparent;
  backdrop-filter: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--gs-ease), background .2s var(--gs-ease);
}
.gs-header + main > :first-child {
  margin-top: calc(-1 * var(--gs-header-h));
  padding-top: var(--gs-header-h);
}
.gs-header[data-scrolled="true"] { border-bottom-color: var(--gs-line);
  background: color-mix(in srgb, var(--gs-ink) 94%, transparent);
  backdrop-filter: blur(10px); }
.gs-header__inner {
  max-width: var(--gs-maxw); margin-inline: auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.gs-header__logo img { height: 30px; width: auto; display: block; }
.gs-nav-toggle {
  display: none; background: none; border: none; color: var(--gs-text);
  cursor: pointer; padding: 8px;
}
.gs-nav { display: flex; gap: clamp(18px, 2.4vw, 36px); align-items: center; }
.gs-nav a { color: var(--gs-text); text-decoration: none; font-weight: var(--gs-w-body);
  font-size: var(--gs-fs-body); }
.gs-nav a:hover, .gs-nav a[aria-current="page"] { color: var(--gs-signal); }
.gs-nav .gs-btn { color: #000000; }
@media (max-width: 860px) {
  .gs-nav-toggle { display: block; }
  .gs-nav {
    display: none; position: absolute; top: var(--gs-header-h); left: 0; right: 0;
    flex-direction: column; padding: 24px var(--gs-pad); gap: 16px;
    background: var(--gs-ink); border-bottom: 1px solid var(--gs-line);
  }
  .gs-nav[data-open="true"] { display: flex; }
}

/* ---------- Footer ---------- */
.gs-footer { background: var(--gs-ink); border-top: 1px solid var(--gs-line);
  padding: clamp(48px, 6vw, 80px) var(--gs-pad); }
.gs-footer__inner { max-width: var(--gs-maxw); margin-inline: auto;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
@media (max-width: 780px) { .gs-footer__inner { grid-template-columns: 1fr; } }

/* ---------- Form ---------- */
.gs-form { display: grid; gap: 18px; grid-template-columns: repeat(2, 1fr); }
.gs-form .gs-field--full { grid-column: 1 / -1; }
@media (max-width: 680px) { .gs-form { grid-template-columns: 1fr; } }
.gs-field label { display: block; margin-bottom: 8px;
  font: var(--gs-w-eyebrow) var(--gs-fs-caption)/1 var(--gs-font);
  text-transform: uppercase; letter-spacing: .1em; color: var(--gs-text-muted); }
.gs-field input, .gs-field select, .gs-field textarea {
  width: 100%; padding: 14px 16px; border-radius: var(--gs-radius-sm);
  background: var(--gs-surface); border: 1px solid var(--gs-line);
  color: var(--gs-text); font: var(--gs-w-body) var(--gs-fs-body)/1.4 var(--gs-font);
}
.gs-field input::placeholder, .gs-field textarea::placeholder { color: color-mix(in srgb, var(--gs-text-muted) 70%, transparent); }

/* ---------- Reveal on scroll (optional, progressive) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .gs-reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--gs-ease), transform .6s var(--gs-ease); }
  .gs-reveal.is-in { opacity: 1; transform: none; }
}

/* ---------- Gravity Forms dark theme ---------- */
.gform_wrapper .gfield_label {
  font: var(--gs-w-eyebrow) var(--gs-fs-caption)/1 var(--gs-font) !important;
  text-transform: uppercase; letter-spacing: .1em; color: var(--gs-text-muted) !important;
}
.gform_wrapper input:not([type="submit"]),
.gform_wrapper select,
.gform_wrapper textarea {
  background: var(--gs-surface) !important; border: 1px solid var(--gs-line) !important;
  border-radius: var(--gs-radius-sm) !important; color: var(--gs-text) !important;
  padding: 14px 16px !important;
  font: var(--gs-w-body) var(--gs-fs-body)/1.4 var(--gs-font) !important;
}
.gform_wrapper select {
  height: auto !important; padding: 14px 16px !important;
  line-height: 1.4 !important; appearance: auto !important;
}
.gform_wrapper input::placeholder,
.gform_wrapper textarea::placeholder { color: var(--gs-text-muted) !important; opacity: .7; }
.gform_wrapper .gform_button,
.gform_wrapper input[type="submit"] {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px !important; border-radius: 999px !important; border: 1px solid transparent !important;
  font: var(--gs-w-title) 0.95rem/1 var(--gs-font) !important; text-decoration: none;
  background: var(--gs-signal) !important; color: #05231A !important;
  cursor: pointer; transition: transform .18s var(--gs-ease), background .18s var(--gs-ease);
}
.gform_wrapper .gform_button:hover,
.gform_wrapper input[type="submit"]:hover {
  background: var(--gs-green-hi) !important; transform: translateY(-1px);
}
.gform_wrapper .gfield_required { color: var(--gs-signal) !important; }
.gform_wrapper .validation_message { color: var(--gs-risk) !important; }
.gform_wrapper .gform_confirmation_message {
  color: var(--gs-signal); font-weight: var(--gs-w-title); font-size: var(--gs-fs-sub);
}

/* ---------- Utility ---------- */
.gs-visually-hidden { position:absolute; width:1px; height:1px; margin:-1px; padding:0;
  overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0; }