/* ============================================================
   RigiFlow — Design Tokens v2
   A dispatch-console read on the same railway idea: dark
   control-room surfaces, signal-light color coding, bold
   geometric type, quiet motion.
   ============================================================ */

:root {
  /* Base surfaces */
  --bg:            #F7F8FB;
  --bg-2:          #FFFFFF;
  --surface:       #FFFFFF;
  --surface-2:     #F1F3F8;
  --surface-border: rgba(10,13,20,0.10);
  --surface-border-hi: rgba(10,13,20,0.20);

  /* Warm light surface (used sparingly, e.g. form fields) */
  --paper:         #F5F3EE;
  --ink-on-paper:  #12151C;

  /* Text */
  --text:          #12151C;
  --text-dim:      #4A5568;
  --text-faint:    #7A8496;

  /* Signal palette — pulled straight from the locomotive + real rail signals.
     Brass is deepened from the dark-theme value so it stays readable as
     text on a light background. */
  --brass:         #A6741E;
  --brass-dim:     #7A5A1F;
  --signal-green:  #1F9D6C;
  --signal-amber:  #C97F0A;
  --signal-red:    #E14536;
  --signal-red-hi: #FF7A6C;
  --accent-indigo: #4A56D6;

  /* Type */
  --font-display: 'Space Grotesk', 'Arial', sans-serif;
  --font-body:    'Manrope', 'Helvetica Neue', sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, monospace;

  /* Scale */
  --step-0: clamp(0.95rem, 0.92rem + 0.15vw, 1.05rem);
  --step-1: clamp(1.1rem, 1.02rem + 0.35vw, 1.3rem);
  --step-2: clamp(1.6rem, 1.35rem + 1vw, 2.1rem);
  --step-3: clamp(2.3rem, 1.8rem + 2vw, 3.4rem);
  --step-4: clamp(2.9rem, 2.1rem + 3.2vw, 4.8rem);

  --radius: 14px;
  --radius-sm: 8px;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.08;
  margin: 0;
  color: var(--text);
}

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

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brass);
  display: inline-block;
}

.rule { border: none; border-top: 1px solid var(--surface-border); margin: 0; }

/* Buttons */
.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn-primary {
  background: var(--signal-red);
  color: #16090A;
}
.btn-primary:hover { background: var(--signal-red-hi); transform: translateY(-2px); box-shadow: 0 10px 24px -8px rgba(255,122,108,0.5); }
.btn-ghost-dark {
  background: rgba(10,13,20,0.03);
  border-color: var(--surface-border);
  color: var(--text);
}
.btn-ghost-dark:hover { border-color: var(--surface-border-hi); background: rgba(10,13,20,0.06); transform: translateY(-2px); }
.btn-ghost-light { background: transparent; border-color: var(--surface-border); color: var(--text); }
.btn-ghost-light:hover { border-color: var(--text); }
.btn-signin {
  background: rgba(166,116,30,0.10);
  border-color: rgba(166,116,30,0.4);
  color: var(--brass);
}
.btn-signin:hover { background: rgba(166,116,30,0.18); border-color: var(--brass); transform: translateY(-2px); }
.nav-signin-mobile { display: none; }
@media (max-width: 900px) {
  .nav-cta .btn-signin { display: none; }
  .nav-signin-mobile { display: block; }
}

/* Signal dot / status pill */
.pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px 4px 8px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--surface-border);
  color: var(--text-dim);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; }
.pill-live { color: #0F7A50; border-color: rgba(31,157,108,0.4); background: rgba(31,157,108,0.10); }
.pill-live .dot { background: var(--signal-green); animation: pulse-dot 2s ease-in-out infinite; }

@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(31,157,108,0.45); }
  70%  { box-shadow: 0 0 0 8px rgba(31,157,108,0); }
  100% { box-shadow: 0 0 0 0 rgba(31,157,108,0); }
}

/* Glass panel — the recurring structural surface */
.panel {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
}

/* Gradient mesh background, used behind hero-type sections */
.mesh-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.mesh-bg::before, .mesh-bg::after {
  content: "";
  position: absolute;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.28;
}
.mesh-bg::before {
  background: radial-gradient(circle, var(--accent-indigo), transparent 70%);
  top: -20%;
  right: -10%;
}
.mesh-bg::after {
  background: radial-gradient(circle, var(--signal-red), transparent 70%);
  bottom: -30%;
  left: -15%;
  opacity: 0.14;
}

/* Scroll reveal — progressive enhancement only. Content is visible by
   default; JS opts elements into the hidden-then-reveal treatment so a
   slow/failed script, or a full-page capture, never hides real content. */
.reveal { opacity: 1; transform: none; transition: opacity 0.6s ease, transform 0.6s ease; }
html.js-reveal .reveal { opacity: 0; transform: translateY(18px); }
html.js-reveal .reveal.in { opacity: 1; transform: translateY(0); }

@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}