/* ============================================================
   Aadeepra Rail Assure — styles.css
   Plain CSS, no framework. Mobile-first.
   ============================================================ */

:root {
  --ink: #0C1E2B;
  --ink-2: #08151E;
  --steel: #51616C;
  --paper: #F4F6F6;
  --line: #DDE3E4;
  --signal: #169B72;
  --signal-2: #2FB78C;
  --amber: #E0A93B;
  --reli: #2E6BF0;
  --white: #FFFFFF;

  --font-display: "Archivo", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  /* Fluid type scale */
  --fs-eyebrow: clamp(0.72rem, 0.68rem + 0.2vw, 0.8rem);
  --fs-body: clamp(1rem, 0.96rem + 0.2vw, 1.1rem);
  --fs-lede: clamp(1.05rem, 0.98rem + 0.5vw, 1.3rem);
  --fs-h3: clamp(1.15rem, 1.05rem + 0.6vw, 1.45rem);
  --fs-h2: clamp(1.8rem, 1.35rem + 2.2vw, 3rem);
  --fs-h1: clamp(2.3rem, 1.5rem + 4vw, 4.4rem);

  --maxw: 1180px;
  --gutter: clamp(1.1rem, 0.6rem + 2.5vw, 2.5rem);
  --radius: 14px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.08; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 4px; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 1000;
  background: var(--ink); color: var(--white); padding: 0.6rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Shared bits ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 1rem;
}
.eyebrow-light { color: var(--signal-2); }
.eyebrow-reli { color: var(--reli); }

.section { padding-block: clamp(3.5rem, 2rem + 8vw, 7rem); }
.section-head { max-width: 60ch; margin-bottom: clamp(2rem, 1rem + 4vw, 3.5rem); }
.section-title { font-size: var(--fs-h2); font-weight: 800; }
.section-lede { font-size: var(--fs-lede); color: var(--steel); margin-top: 1.1rem; }
.section-lede-light { color: #AEBCC4; }

.section-dark { background: var(--ink); color: var(--white); }
.section-dark .section-title { color: var(--white); }

.grid { display: grid; gap: clamp(1rem, 0.5rem + 2vw, 1.6rem); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700;
  font-size: 0.98rem; letter-spacing: 0.01em;
  padding: 0.85rem 1.5rem; border-radius: 999px;
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease),
              color 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-cta { background: var(--signal); color: var(--white); box-shadow: 0 8px 24px -10px rgba(22,155,114,0.7); }
.btn-cta:hover { background: #128762; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); }
.btn-signal { background: var(--signal-2); color: var(--ink-2); }
.btn-signal:hover { background: #43c69c; }
.btn-reli { background: var(--reli); color: var(--white); box-shadow: 0 8px 24px -10px rgba(46,107,240,0.7); }
.btn-reli:hover { background: #2057d6; }

/* ============ HEADER ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.82);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; }
.brand-glyph { flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-mark { font-family: var(--font-display); font-weight: 800; letter-spacing: 0.04em; font-size: 1.1rem; }
.brand-full { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--steel); margin-top: 3px; }

.nav { display: flex; align-items: center; gap: clamp(0.8rem, 0.2rem + 1.4vw, 1.8rem); }
.nav > a:not(.btn) {
  font-size: 0.95rem; font-weight: 500; color: var(--ink); position: relative; padding-block: 0.3rem;
}
.nav > a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--signal); transition: width 0.25s var(--ease);
}
.nav > a:not(.btn):hover::after { width: 100%; }
.nav-cta { padding: 0.5rem 1.1rem; }

.hamburger {
  display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px;
  align-items: center; justify-content: center; background: transparent; border: 1px solid var(--line);
  border-radius: 10px; cursor: pointer;
}
.hamburger span { width: 20px; height: 2px; background: var(--ink); transition: transform 0.25s var(--ease), opacity 0.2s; }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .hamburger { display: flex; }
  .nav {
    position: fixed; inset: 60px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--white); border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--gutter) 1.2rem;
    transform: translateY(-120%); transition: transform 0.3s var(--ease);
    box-shadow: 0 20px 30px -20px rgba(8,21,30,0.3);
  }
  .nav.open { transform: translateY(0); }
  .nav > a:not(.btn) { padding: 0.9rem 0; border-bottom: 1px solid var(--line); }
  .nav-cta { margin-top: 1rem; padding: 0.85rem 1.5rem; }
}

/* ============ HERO ============ */
.hero { position: relative; overflow: hidden; background: var(--white); padding-top: clamp(2.5rem, 1rem + 6vw, 5rem); padding-bottom: clamp(2.5rem, 1rem + 6vw, 5rem); }
.blueprint-grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 38px 38px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 0%, transparent 70%);
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 0%, transparent 70%);
  opacity: 0.5;
}
.hero-inner { position: relative; z-index: 1; max-width: 56rem; }
.hero-title { font-size: var(--fs-h1); font-weight: 800; margin-bottom: 1.25rem; letter-spacing: -0.02em; }
.hero-sub { font-size: var(--fs-lede); color: var(--steel); max-width: 50ch; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.8rem; }

.rail-signature { margin-top: 2.6rem; }
.rail-draw { width: 100%; height: 56px; }
.rail-rail { stroke: var(--ink); stroke-width: 2; opacity: 0.85; }
.rail-sleepers line { stroke: var(--amber); stroke-width: 3; }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 2rem; }
.chips li {
  font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em;
  color: var(--ink); border: 1px solid var(--line); background: var(--paper);
  padding: 0.4rem 0.7rem; border-radius: 999px;
}
.regions { font-family: var(--font-mono); font-size: 0.82rem; color: var(--steel); margin-top: 1.4rem; letter-spacing: 0.02em; }

/* ============ MISSION ============ */
.mission { background: var(--paper); padding-block: clamp(3rem, 2rem + 5vw, 5.5rem); }
.mission-text {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.4rem, 1rem + 2.2vw, 2.4rem); line-height: 1.25;
  max-width: 28ch; letter-spacing: -0.01em;
}
.mission-eyebrow {
  display: block; font-family: var(--font-mono); font-size: var(--fs-eyebrow);
  font-weight: 400; letter-spacing: 0.16em; color: var(--signal); margin-bottom: 1.2rem;
}
.mission-text em { font-style: normal; color: var(--signal); }

/* ---------- Rail divider (signature motif) ---------- */
.rail-divider {
  height: 26px; position: relative; background: var(--white);
  background-image:
    /* two rails */
    linear-gradient(var(--line), var(--line)),
    linear-gradient(var(--line), var(--line)),
    /* sleeper ticks */
    repeating-linear-gradient(90deg, var(--amber) 0 2px, transparent 2px 26px);
  background-repeat: no-repeat, no-repeat, repeat-x;
  background-size: 100% 1.5px, 100% 1.5px, 100% 12px;
  background-position: 0 9px, 0 17px, 0 7px;
}

/* ============ SERVICES ============ */
.services-grid { grid-template-columns: 1fr; }
@media (min-width: 640px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .services-grid { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.3rem, 1rem + 1vw, 1.8rem);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.service-card { position: relative; }
.service-card:hover { transform: translateY(-4px); box-shadow: 0 22px 40px -28px rgba(8,21,30,0.4); border-color: #c6d0d2; }
.card-index {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--signal);
  letter-spacing: 0.1em; display: block; margin-bottom: 0.8rem;
}
.service-card h3 { font-size: var(--fs-h3); font-weight: 700; margin-bottom: 1rem; }
.card-list li {
  font-size: 0.92rem; color: var(--steel); padding-left: 1.2rem; position: relative; margin-bottom: 0.6rem; line-height: 1.45;
}
.card-list li::before {
  content: ""; position: absolute; left: 0; top: 0.55em; width: 8px; height: 2px; background: var(--amber);
}

/* ============ LIFECYCLE TRACK ============ */
.lifecycle .section-head { max-width: 60ch; }

.track { position: relative; margin-top: 1rem; }

/* Desktop: horizontal rail */
@media (min-width: 760px) {
  .track-rail {
    position: absolute; left: 0; right: 0; top: 18px; height: 22px; z-index: 0;
  }
  .track-line {
    position: absolute; left: 0; right: 0; height: 2px; background: rgba(255,255,255,0.28);
  }
  .track-line:nth-child(1) { top: 4px; }
  .track-line:nth-child(2) { top: 16px; }
  .track-sleepers {
    position: absolute; left: 0; right: 0; top: 4px; height: 14px;
    background-image: repeating-linear-gradient(90deg, var(--amber) 0 2px, transparent 2px 34px);
    opacity: 0.55;
  }
  .track-indicator {
    position: absolute; top: -2px; left: 0; width: 26px; height: 26px; border-radius: 50%;
    background: radial-gradient(circle at 50% 40%, var(--signal-2), var(--signal));
    box-shadow: 0 0 0 5px rgba(47,183,140,0.18), 0 0 22px rgba(47,183,140,0.55);
    transform: translateX(0); transition: left 1.2s var(--ease);
  }
  .stations { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; position: relative; z-index: 1; }
  .station { padding-top: 56px; text-align: left; }
  .station-dot { display: none; }
}

/* Mobile: vertical rail */
@media (max-width: 759px) {
  .track-rail {
    position: absolute; left: 13px; top: 0; bottom: 0; width: 22px; z-index: 0;
  }
  .track-line { position: absolute; top: 0; bottom: 0; width: 2px; background: rgba(255,255,255,0.28); }
  .track-line:nth-child(1) { left: 4px; }
  .track-line:nth-child(2) { left: 16px; }
  .track-sleepers {
    position: absolute; top: 0; bottom: 0; left: 4px; width: 14px;
    background-image: repeating-linear-gradient(0deg, var(--amber) 0 2px, transparent 2px 30px);
    opacity: 0.55;
  }
  .track-indicator {
    position: absolute; left: -2px; top: 0; width: 26px; height: 26px; border-radius: 50%;
    background: radial-gradient(circle at 50% 40%, var(--signal-2), var(--signal));
    box-shadow: 0 0 0 5px rgba(47,183,140,0.18), 0 0 22px rgba(47,183,140,0.55);
    transition: top 1s var(--ease);
  }
  .stations { display: grid; gap: 1.6rem; position: relative; z-index: 1; }
  .station { padding-left: 52px; position: relative; }
  .station-dot {
    position: absolute; left: 7px; top: 4px; width: 14px; height: 14px; border-radius: 50%;
    background: var(--ink); border: 2px solid var(--signal-2);
  }
}

.station-no { font-family: var(--font-mono); font-size: 0.95rem; color: var(--signal-2); letter-spacing: 0.1em; display: block; margin-bottom: 0.4rem; }
.station-name { font-size: var(--fs-h3); font-weight: 700; color: var(--white); margin-bottom: 0.5rem; }
.station-desc { font-size: 0.9rem; color: #AEBCC4; line-height: 1.5; }

/* ============ WHY ARA ============ */
.why { background: var(--paper); }
.why-grid { grid-template-columns: 1fr; }
@media (min-width: 700px) { .why-grid { grid-template-columns: repeat(2, 1fr); } }
.why-card { background: var(--white); }
.why-card:hover { transform: translateY(-4px); box-shadow: 0 22px 40px -28px rgba(8,21,30,0.35); }
.why-card h3 { font-size: var(--fs-h3); font-weight: 700; margin-bottom: 0.7rem; }
.why-card h3::before {
  content: ""; display: inline-block; width: 22px; height: 3px; background: var(--signal);
  vertical-align: middle; margin-right: 0.6rem;
}
.why-card p { color: var(--steel); font-size: 0.96rem; }

/* ============ INDUSTRIES ============ */
.industries-grid { grid-template-columns: 1fr; }
@media (min-width: 560px) { .industries-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 920px) { .industries-grid { grid-template-columns: repeat(3, 1fr); } }
.industry {
  display: flex; align-items: center; gap: 0.9rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.3rem; font-family: var(--font-display); font-weight: 600; font-size: 1.05rem;
  background: var(--white);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.industry:hover { transform: translateY(-3px); border-color: var(--signal); }
.industry-mark {
  font-family: var(--font-mono); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.06em;
  color: var(--signal); background: var(--paper); border: 1px solid var(--line);
  padding: 0.35rem 0.5rem; border-radius: 7px; flex: none;
}

/* ============ RELIFRAME ============ */
.reliframe { background: var(--ink-2); color: var(--white); position: relative; overflow: hidden; }
.reliframe::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(60% 80% at 85% 10%, rgba(46,107,240,0.22), transparent 60%),
    repeating-linear-gradient(90deg, rgba(46,107,240,0.07) 0 1px, transparent 1px 40px);
  pointer-events: none;
}
.reliframe-inner {
  position: relative; display: grid; gap: clamp(2rem, 1rem + 4vw, 4rem); align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) { .reliframe-inner { grid-template-columns: 1.05fr 0.95fr; } }
/* Product title + status badge */
.reli-titlerow { display: flex; align-items: center; flex-wrap: wrap; gap: 0.7rem 0.9rem; margin-bottom: 0.9rem; }
.reli-name {
  font-family: var(--font-display); font-weight: 800; color: var(--white);
  font-size: clamp(2rem, 1.4rem + 2.6vw, 3.2rem); letter-spacing: -0.02em; line-height: 1;
}
.reli-badge {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--reli); background: rgba(46,107,240,0.12); border: 1px solid rgba(46,107,240,0.5);
  padding: 0.32rem 0.6rem; border-radius: 999px; white-space: nowrap;
}
.reli-badge::before {
  content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--reli); margin-right: 0.45rem; vertical-align: middle;
  box-shadow: 0 0 8px rgba(46,107,240,0.9);
}
.reli-tagline {
  font-family: var(--font-display); font-weight: 600; color: #DCE6FF;
  font-size: clamp(1.1rem, 0.95rem + 0.8vw, 1.5rem); line-height: 1.3; margin-bottom: 1.1rem;
}
.reli-lede { color: #B9C6E0; font-size: var(--fs-body); margin-bottom: 1.1rem; }
.reli-complement {
  color: #D7DFF2; font-size: 0.96rem; border-left: 2px solid var(--reli);
  padding-left: 0.9rem; margin-bottom: 1.6rem;
}
.reli-ctas { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 1.6rem; }
.reli-standards {
  font-family: var(--font-mono); font-size: 0.74rem; color: #8FA3C8; line-height: 1.7; letter-spacing: 0.02em;
}
.reli-standards-label {
  display: block; color: var(--reli); letter-spacing: 0.14em; margin-bottom: 0.3rem; font-size: 0.66rem;
}
.reli-standards-note { margin-top: 0.7rem; color: #7E92B8; font-size: 0.78rem; line-height: 1.5; font-style: italic; max-width: 60ch; }

/* Modules */
.reli-modules { margin-top: clamp(2.5rem, 1.5rem + 3vw, 4rem); border-top: 1px solid rgba(46,107,240,0.25); padding-top: clamp(2rem, 1rem + 3vw, 3rem); }
.reli-modules-head {
  font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.14em; color: var(--reli);
  text-transform: uppercase; margin-bottom: 1.4rem;
}
.reli-module-grid {
  columns: 1; column-gap: 2rem; list-style: none;
}
@media (min-width: 560px) { .reli-module-grid { columns: 2; } }
@media (min-width: 900px) { .reli-module-grid { columns: 3; } }
.reli-module-grid li {
  break-inside: avoid; -webkit-column-break-inside: avoid;
  font-family: var(--font-mono); font-size: 0.86rem; letter-spacing: 0.01em; color: #D7DFF2;
  position: relative; padding-left: 1.3rem; margin-bottom: 0.7rem; line-height: 1.4;
}
.reli-module-grid li::before {
  content: ""; position: absolute; left: 0; top: 0.5em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--reli);
  box-shadow: 0 0 8px rgba(46,107,240,0.8);
}
.reli-support { margin-top: 1.4rem; color: #93A6CE; font-size: 0.92rem; line-height: 1.6; max-width: 88ch; }

.reli-panel {
  background: rgba(8,21,30,0.7); border: 1px solid rgba(46,107,240,0.35);
  border-radius: 16px; padding: 1.1rem; box-shadow: 0 30px 60px -30px rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
}
.reli-panel-head { display: flex; align-items: center; gap: 0.4rem; padding-bottom: 0.9rem; border-bottom: 1px solid rgba(255,255,255,0.08); margin-bottom: 1rem; }
.reli-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.25); }
.reli-dot:first-child { background: var(--reli); }
.reli-title { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; color: #93A6CE; margin-left: 0.5rem; text-transform: uppercase; }
.reli-row { display: grid; grid-template-columns: 92px 1fr 56px; align-items: center; gap: 0.7rem; margin-bottom: 0.85rem; }
.reli-label { font-family: var(--font-mono); font-size: 0.72rem; color: #93A6CE; letter-spacing: 0.04em; }
.reli-bar { height: 8px; background: rgba(255,255,255,0.08); border-radius: 999px; overflow: hidden; }
.reli-bar i { display: block; height: 100%; width: var(--w); background: linear-gradient(90deg, var(--reli), #6f9bff); border-radius: 999px; transform-origin: left; transform: scaleX(0); transition: transform 1s var(--ease); }
.reli-panel.in-view .reli-bar i { transform: scaleX(1); }
.reli-val { font-family: var(--font-mono); font-size: 0.78rem; color: var(--white); text-align: right; }

/* ============ CONTACT ============ */
.contact-inner { display: grid; gap: clamp(2rem, 1rem + 4vw, 4rem); grid-template-columns: 1fr; }
@media (min-width: 880px) { .contact-inner { grid-template-columns: 1fr 1fr; } }
.contact-meta { margin-top: 2rem; }
.contact-meta li { display: flex; flex-direction: column; gap: 0.15rem; padding: 0.9rem 0; border-top: 1px solid rgba(255,255,255,0.1); }
.contact-meta li:last-child { border-bottom: 1px solid rgba(255,255,255,0.1); }
.contact-key { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em; color: var(--signal-2); }
.contact-meta a { color: var(--white); border-bottom: 1px solid rgba(255,255,255,0.3); width: max-content; }
.contact-meta a:hover { border-color: var(--signal-2); }

.contact-form { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px; padding: clamp(1.3rem, 1rem + 1.5vw, 2rem); }
.field { margin-bottom: 1.1rem; }
.field label { display: block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: #AEBCC4; margin-bottom: 0.45rem; text-transform: uppercase; }
.field input, .field textarea {
  width: 100%; font-family: var(--font-body); font-size: 0.98rem; color: var(--white);
  background: rgba(8,21,30,0.6); border: 1px solid rgba(255,255,255,0.16); border-radius: 10px;
  padding: 0.75rem 0.9rem; transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field textarea { resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--signal-2); box-shadow: 0 0 0 3px rgba(47,183,140,0.2); }
.field input:invalid:not(:placeholder-shown) { border-color: #c2543f; }
.form-note { margin-top: 0.9rem; font-family: var(--font-mono); font-size: 0.8rem; color: var(--signal-2); min-height: 1.2em; }
.form-note.error { color: #ff9f8c; }

/* ============ FOOTER ============ */
.site-footer { background: var(--ink-2); color: #AEBCC4; padding-top: clamp(2.5rem, 1.5rem + 4vw, 4rem); }
.footer-inner { display: grid; gap: 2rem; grid-template-columns: 1fr; padding-bottom: 2.5rem; }
@media (min-width: 760px) { .footer-inner { grid-template-columns: 1.4fr 1fr 1.2fr; } }
.footer-brand .brand-mark { color: var(--white); font-size: 1.4rem; }
.footer-brand p { margin-top: 0.6rem; font-size: 0.9rem; line-height: 1.5; }
.footer-nav { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-nav a { font-size: 0.95rem; color: #C7D1D6; width: max-content; }
.footer-nav a:hover { color: var(--white); }
.footer-standards { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-std-label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em; color: var(--signal-2); }
.footer-standards span:last-child { font-family: var(--font-mono); font-size: 0.82rem; color: #C7D1D6; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 1.4rem 0; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.82rem; }
.footer-rail { flex: 1; min-width: 120px; height: 14px; max-width: 260px;
  background-image:
    linear-gradient(rgba(255,255,255,0.25), rgba(255,255,255,0.25)),
    linear-gradient(rgba(255,255,255,0.25), rgba(255,255,255,0.25)),
    repeating-linear-gradient(90deg, var(--amber) 0 2px, transparent 2px 20px);
  background-repeat: no-repeat, no-repeat, repeat-x;
  background-size: 100% 1.5px, 100% 1.5px, 100% 9px;
  background-position: 0 4px, 0 9px, 0 3px;
}

/* ============ Scroll reveal ============ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in-view { opacity: 1; transform: none; }

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .service-card:hover, .why-card:hover, .industry:hover { transform: none; }
  .track-indicator { transition: none; }
  .reli-bar i { transition: none; transform: scaleX(1); }
  .rail-sleepers line { transition: none; }
  * { animation-duration: 0.001ms !important; }
}