/* =====================================================================
   CEPTRO — SHARED STYLESHEET
   =====================================================================
   Used by every page: index.html, about.html, how-it-works.html,
   contact.html. Edit once here and all pages update together.

   Design tokens (colours, fonts, spacing) live in the :root block below —
   change them once to re-theme the whole site.
   ===================================================================== */

/* =====================================================================
   DESIGN TOKENS — edit these to re-theme the entire site
   ===================================================================== */
:root {
  /* Palette */
  --bg:            #f7f6f2;   /* warm off-white page background        */
  --surface:       #ffffff;   /* cards, nav, elevated surfaces         */
  --surface-alt:   #f1efe9;   /* subtle alternating section background  */
  --text:          #1a1d23;   /* primary dark neutral for text          */
  --text-muted:    #5c626e;   /* secondary / supporting text            */
  --border:        #e6e3db;   /* hairline borders                       */

  --accent:        #3b5bdb;   /* modern techy blue — primary accent     */
  --accent-hover:  #2f49b8;   /* darker accent for hover states         */
  --accent-soft:   #eaeeff;   /* tinted accent background (chips/icons) */

  /* Secondary accent — warm coral. Used SPARINGLY (one service icon + the
     contact email chip), as a subtle complement to the blue. Don't overuse. */
  --accent-2:       #f0764c;  /* warm coral — secondary accent          */
  --accent-2-hover: #e0603a;  /* darker coral for hover states          */
  --accent-2-soft:  #fdece3;  /* tinted warm background                 */

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Spacing / layout */
  --max-width: 1120px;
  --radius:    16px;
  --radius-sm: 10px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(20, 22, 30, 0.04), 0 2px 6px rgba(20, 22, 30, 0.04);
  --shadow-md: 0 4px 12px rgba(20, 22, 30, 0.06), 0 12px 28px rgba(20, 22, 30, 0.06);
  --shadow-lg: 0 12px 40px rgba(20, 22, 30, 0.12);

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* =====================================================================
   BASE / RESET
   ===================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; /* offset for sticky nav */ }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0;
  font-weight: 800;
  font-style: normal; /* hardening: never let a fallback font apply italics */
}
p, a, button, input, textarea, label { font-style: normal; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* Scroll-reveal utility — elements fade/slide up into place as they enter the viewport (see JS) */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Shared layout container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 24px;
}

/* Section rhythm */
.section { padding-block: clamp(64px, 10vw, 120px); }
.section--alt { background: var(--surface-alt); }

/* Small eyebrow label above headings */
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section__title { font-size: clamp(2.1rem, 4.2vw, 3.1rem); max-width: 18ch; }
.section__lead  { color: var(--text-muted); font-size: 1.125rem; max-width: 56ch; margin-top: 20px; }

/* =====================================================================
   BUTTONS
   ===================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease),
              box-shadow 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 18px rgba(59, 91, 219, 0.28);
}
.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(59, 91, 219, 0.34);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
}

/* =====================================================================
   SECTION: NAVIGATION BAR
   ===================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
/* Adds a hairline + shadow once the user scrolls (toggled via JS) */
.nav.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding-left: 14px;  /* logo sits closer to the left edge   */
  padding-right: 8px;  /* hamburger sits tighter into the right corner (still comfortably clickable) */
}

/* Wordmark logo — replace with an <img> if you have a real logo */
.nav__logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.nav__logo .mark {
  display: inline-grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0;
}

/* Hamburger button — always visible, on every screen size. Clicking it
   opens the slide-out .nav__panel (see below), not an inline link list. */
.nav__toggle {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 46px; height: 46px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.nav__toggle:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  display: block;
  width: 20px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease), background 0.2s var(--ease);
}
.nav__toggle span { position: relative; }
.nav__toggle span::before { position: absolute; top: -6px; }
.nav__toggle span::after  { position: absolute; top:  6px; }
/* Animate hamburger → X when panel is open */
.nav.is-open .nav__toggle span { background: transparent; }
.nav.is-open .nav__toggle span::before { transform: translateY(6px) rotate(45deg); background: var(--accent); }
.nav.is-open .nav__toggle span::after  { transform: translateY(-6px) rotate(-45deg); background: var(--accent); }

/* --- Slide-out nav panel (used on ALL screen sizes, not just mobile) --- */
.nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 21, 0.42);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
  z-index: 150;
}
.nav__overlay.is-visible { opacity: 1; visibility: visible; }

.nav__panel {
  position: fixed;
  top: 0; right: 0;
  height: 100%;
  width: min(380px, 86vw);
  background: var(--surface);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  z-index: 160;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s var(--ease);
}
.nav__panel.is-open { transform: translateX(0); }

.nav__panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
}
.nav__panel-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.nav__panel-close {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 38px; height: 38px;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  color: var(--text);
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.nav__panel-close:hover { border-color: var(--accent); color: var(--accent); }
.nav__panel-close svg { width: 18px; height: 18px; }

.nav__panel-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.nav__panel-links li {
  border-bottom: 1px solid var(--border);
  /* Hidden until the panel opens; each item cascades in (see stagger delays below) */
  opacity: 0;
  transform: translateX(22px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}
.nav__panel-links li:first-child { border-top: 1px solid var(--border); }
.nav__panel.is-open .nav__panel-links li { opacity: 1; transform: translateX(0); }
/* Staggered cascade — each menu item enters ~0.1s after the one before it */
.nav__panel.is-open .nav__panel-links li:nth-child(1) { transition-delay: 0.14s; }
.nav__panel.is-open .nav__panel-links li:nth-child(2) { transition-delay: 0.24s; }
.nav__panel.is-open .nav__panel-links li:nth-child(3) { transition-delay: 0.34s; }
.nav__panel.is-open .nav__panel-links li:nth-child(4) { transition-delay: 0.44s; }

.nav__panel-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 4px;
  font-size: 1.85rem;      /* noticeably larger — a designed moment */
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  position: relative;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}
/* Subtle hover: whole link shifts right + arrow slides in and turns accent */
.nav__panel-links a:hover { color: var(--accent); transform: translateX(10px); }
.nav__panel-links a .arrow {
  font-size: 1.4rem;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
.nav__panel-links a:hover .arrow { opacity: 1; transform: translateX(0); }

/* --- Bottom "connect" block: fills the lower space with email + socials + CTA --- */
.nav__panel-connect {
  margin-top: auto;          /* sits toward the bottom of the panel */
  padding-top: 30px;
  /* cascades in just after the last link */
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.nav__panel.is-open .nav__panel-connect { opacity: 1; transform: translateY(0); transition-delay: 0.54s; }
.nav__panel-connect-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.nav__panel-connect .socials { margin-top: 4px; }

/* =====================================================================
   SECTION: HERO
   ===================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(72px, 12vw, 140px);
}
/* Soft decorative gradient glows behind the hero — pure CSS, no image */
.hero::before {
  content: "";
  position: absolute;
  top: -30%; right: -10%;
  width: 620px; height: 620px;
  background: radial-gradient(circle at center,
              rgba(59, 91, 219, 0.20), rgba(59, 91, 219, 0) 68%);
  pointer-events: none;
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -35%; left: -8%;
  width: 480px; height: 480px;
  background: radial-gradient(circle at center,
              rgba(59, 91, 219, 0.10), rgba(59, 91, 219, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

/* Reusable decorative blob for non-hero sections (adds visual richness / breaks up flat backgrounds) */
.section { position: relative; }
.section-glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(4px);
}
.section > .container { position: relative; z-index: 1; }
.hero__inner { position: relative; z-index: 1; max-width: 880px; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 26px;
}
.hero__badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.hero__title {
  font-size: clamp(2.7rem, 7vw, 4.9rem);
  font-weight: 800;
  letter-spacing: -0.042em;
  line-height: 1.04;
}
.hero__title .accent { color: var(--accent); }

.hero__subtext {
  margin-top: 28px;
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--text-muted);
  max-width: 54ch;
  line-height: 1.62;
}

.hero__actions {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* =====================================================================
   SECTION: ABOUT
   ===================================================================== */
.about__grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Value-prop cards — larger, with an icon chip for more visual presence */
.value-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 34px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), border-color 0.22s var(--ease);
}
.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}
.value-card__icon {
  display: inline-grid;
  place-items: center;
  width: 56px; height: 56px;
  border-radius: 15px;
  background: linear-gradient(135deg, var(--accent-soft), #dde4ff);
  color: var(--accent);
  margin-bottom: 24px;
  box-shadow: 0 4px 14px rgba(59, 91, 219, 0.12);
  transition: transform 0.25s var(--ease);
}
.value-card:hover .value-card__icon { transform: scale(1.06) rotate(-4deg); }
.value-card__icon svg { width: 27px; height: 27px; }
.value-card__title { font-size: 1.4rem; letter-spacing: -0.02em; }
.value-card__text { color: var(--text-muted); margin-top: 12px; font-size: 1.02rem; }

/* =====================================================================
   SECTION: SERVICES — DETAILED (one dedicated block per service)
   ===================================================================== */
/* Stacked, editorial layout — four distinct sections with generous spacing,
   calm and content-focused (no punchy hover lift like the compact cards). */
.svc-detail-grid {
  margin-top: 64px;
  display: flex;
  flex-direction: column;
  gap: 40px; /* significant breathing room so each reads as its own section */
}
.svc-detail {
  /* Per-service hue + tint are set by the modifier classes below */
  --hue:  var(--accent);
  --tint: var(--accent-soft);
  display: grid;
  grid-template-columns: minmax(0, 330px) minmax(0, 1fr);
  gap: 54px;
  align-items: start;
  background: var(--tint);
  border: 1px solid color-mix(in srgb, var(--hue) 16%, var(--border));
  border-radius: var(--radius);
  padding: 68px 64px;
  scroll-margin-top: 100px; /* lands below the sticky nav when scrolled to */
}
/* Left column: large icon + service name */
.svc-detail__icon {
  display: inline-grid;
  place-items: center;
  width: 94px; height: 94px;
  border-radius: 24px;
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--hue) 14%, #fff),
              color-mix(in srgb, var(--hue) 32%, #fff));
  color: var(--hue);
  box-shadow: 0 10px 26px color-mix(in srgb, var(--hue) 22%, transparent);
}
.svc-detail__icon svg { width: 46px; height: 46px; }
.svc-detail__title { font-size: 2.3rem; letter-spacing: -0.03em; margin-top: 26px; }
/* Right column: the expanded copy */
.svc-detail__body { padding-top: 8px; }
.svc-detail__text {
  color: var(--text-muted);
  font-size: 1.12rem;
  line-height: 1.72;
}
.svc-detail__text + .svc-detail__text { margin-top: 18px; }
/* Per-service hues — muted, all within the site palette */
.svc-detail--coral  { --hue: #f0764c; --tint: #fdf2ed; } /* AI Automation      */
.svc-detail--blue   { --hue: #3b5bdb; --tint: #eef1fd; } /* Data Research       */
.svc-detail--teal   { --hue: #12988d; --tint: #e8f5f3; } /* Workflow Design     */
.svc-detail--violet { --hue: #7657c6; --tint: #f2eefb; } /* Custom Integrations */

/* =====================================================================
   STICKY SIDE ICONS — four small service shortcuts pinned to the viewport
   edges (2 left, 2 right). Each scrolls to its detailed block.
   ===================================================================== */
.svc-rail {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90; /* below the nav (100) and slide-out panel/overlay */
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.svc-rail--left  { left: 20px; }
.svc-rail--right { right: 20px; }
.svc-dot {
  --hue: var(--accent);
  position: relative;
  display: grid;
  place-items: center;
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--hue);
  /* Soft ambient glow in the circle's own accent colour — a blurred haze
     extending slightly past the edge, plus a faint grounding shadow. */
  box-shadow:
    0 0 18px 2px color-mix(in srgb, var(--hue) 26%, transparent),
    0 4px 14px    color-mix(in srgb, var(--hue) 15%, transparent);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.svc-dot:hover {
  transform: scale(1.08);
  border-color: var(--hue);
  /* Intensify the haze on hover so it reads as a focal point */
  box-shadow:
    0 0 26px 4px color-mix(in srgb, var(--hue) 40%, transparent),
    0 6px 18px    color-mix(in srgb, var(--hue) 22%, transparent);
}
.svc-dot svg { width: 28px; height: 28px; }
/* Tooltip label that appears on hover */
.svc-dot__label {
  position: absolute;
  top: 50%;
  white-space: nowrap;
  font-size: 0.78rem;
  font-weight: 600;
  color: #fff;
  background: var(--text);
  padding: 5px 10px;
  border-radius: 8px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
}
.svc-rail--left  .svc-dot__label { left: calc(100% + 12px); transform: translateY(-50%) translateX(-6px); }
.svc-rail--right .svc-dot__label { right: calc(100% + 12px); transform: translateY(-50%) translateX(6px); }
.svc-rail--left  .svc-dot:hover .svc-dot__label { opacity: 1; transform: translateY(-50%) translateX(0); }
.svc-rail--right .svc-dot:hover .svc-dot__label { opacity: 1; transform: translateY(-50%) translateX(0); }
/* Per-service colour, matching the detailed blocks */
.svc-dot--coral  { --hue: #f0764c; }
.svc-dot--blue   { --hue: #3b5bdb; }
.svc-dot--teal   { --hue: #12988d; }
.svc-dot--violet { --hue: #7657c6; }

/* =====================================================================
   SECTION: PROCESS — numbered "how it works" steps
   ===================================================================== */
.process__grid {
  margin-top: 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
}
.process__step {
  padding: 34px 28px 34px 0;
  border-right: 1px solid var(--border);
  position: relative;
}
.process__step:last-child { border-right: none; }
.process__step:not(:first-child) { padding-left: 28px; }
/* Accent tick above each step */
.process__step::before {
  content: "";
  position: absolute;
  top: -1px; left: 0;
  width: 42px; height: 2px;
  background: var(--accent);
}
.process__step:not(:first-child)::before { left: 28px; }
.process__num {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.process__title { font-size: 1.22rem; margin-top: 16px; }
.process__text {
  color: var(--text-muted);
  margin-top: 10px;
  font-size: 0.97rem;
  line-height: 1.62;
}

/* =====================================================================
   SECTION: CLOSING CTA BAND — full-width dark panel before the footer
   ===================================================================== */
/* Stays in the white/blue palette — a soft blue-tinted panel, not a dark band */
.cta-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #f4f6ff, #eaeeff);
  border-top: 1px solid color-mix(in srgb, var(--accent) 14%, var(--border));
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 14%, var(--border));
  padding-block: clamp(64px, 9vw, 104px);
  text-align: center;
}
/* Soft accent glow so the panel isn't flat */
.cta-band::before {
  content: "";
  position: absolute;
  top: -45%; left: 50%;
  transform: translateX(-50%);
  width: 700px; height: 700px;
  background: radial-gradient(circle at center,
              rgba(59, 91, 219, 0.16), rgba(59, 91, 219, 0) 68%);
  pointer-events: none;
}
.cta-band__inner { position: relative; z-index: 1; }
.cta-band__title {
  font-size: clamp(2rem, 4.4vw, 3.1rem);
  letter-spacing: -0.03em;
  max-width: 22ch;
  margin-inline: auto;
}
.cta-band__text {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-top: 20px;
  max-width: 52ch;
  margin-inline: auto;
  line-height: 1.62;
}
.cta-band__actions { margin-top: 36px; }

/* =====================================================================
   SECTION: CONTACT
   ===================================================================== */
.contact__layout {
  margin-top: 52px;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: start;
}

/* Left column — heading + contact details + socials */
.contact__aside .contact__detail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  color: var(--text-muted);
  font-size: 0.98rem;
}
.contact__detail .icon {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 11px;
  background: var(--accent-2-soft);  /* subtle warm secondary accent */
  border: 1px solid #f6d9ca;
  color: var(--accent-2);
  flex-shrink: 0;
}
.contact__detail .icon svg { width: 18px; height: 18px; }

/* Social icon buttons (reused in footer) */
.socials { display: flex; gap: 12px; margin-top: 30px; }
.social-btn {
  display: inline-grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: transform 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.social-btn:hover {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
}
.social-btn svg { width: 19px; height: 19px; }

/* Right column — the form */
.contact__form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 38px);
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; }
.form-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.form-field input,
.form-field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 0.97rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease);
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: #a4a8b2; }
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  background: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.form-field textarea { resize: vertical; min-height: 130px; }

.form-submit { width: 100%; margin-top: 4px; }

/* =====================================================================
   SECTION: FOOTER
   ===================================================================== */
.footer {
  border-top: 1px solid var(--border);
  padding-block: 56px 40px;
  background: var(--surface-alt);
}
/* Upper area: brand blurb + link columns */
.footer__top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer__brand { font-weight: 800; font-size: 1.25rem; letter-spacing: -0.03em; }
.footer__blurb {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 12px;
  max-width: 34ch;
  line-height: 1.62;
}
.footer__col-title {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer__links { list-style: none; margin: 0; padding: 0; }
.footer__links li + li { margin-top: 11px; }
.footer__links a {
  font-size: 0.95rem;
  color: var(--text);
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease);
}
.footer__links a:hover { color: var(--accent); padding-left: 4px; }
/* Lower bar: copyright */
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 26px;
}
.footer__copy { color: var(--text-muted); font-size: 0.9rem; }

/* =====================================================================
   RESPONSIVE — tablet & mobile
   ===================================================================== */
/* Hide the sticky side icons when the viewport is too narrow to clear the
   main content (they'd otherwise crowd/overlap it). */
@media (max-width: 1200px) {
  .svc-rail { display: none; }
}

@media (max-width: 900px) {
  .about__grid    { grid-template-columns: 1fr 1fr; }
  .contact__layout { grid-template-columns: 1fr; gap: 36px; }
  /* Process steps: 4 across → 2x2 */
  .process__grid { grid-template-columns: 1fr 1fr; }
  .process__step { border-bottom: 1px solid var(--border); }
  .process__step:nth-child(2n) { border-right: none; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 720px) {
  /* Detailed service blocks stack their icon/title above the copy */
  .svc-detail { grid-template-columns: 1fr; gap: 28px; padding: 48px 40px; }
  .svc-detail__title { font-size: 2rem; }
}

@media (max-width: 560px) {
  .about__grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .nav__panel { width: 100vw; padding: 24px 22px; }
  .svc-detail { padding: 38px 28px; }
  .svc-detail__title { font-size: 1.8rem; }
  /* Process steps stack fully */
  .process__grid { grid-template-columns: 1fr; }
  .process__step,
  .process__step:not(:first-child) { border-right: none; padding-left: 0; }
  .process__step:not(:first-child)::before { left: 0; }
  .footer__top { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* =====================================================================
   SUBPAGE HERO — compact page header used on about / how-it-works / contact
   ===================================================================== */
.page-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(56px, 8vw, 96px) clamp(32px, 4vw, 48px);
}
.page-hero::before {
  content: "";
  position: absolute;
  top: -40%; right: -8%;
  width: 520px; height: 520px;
  background: radial-gradient(circle at center,
              rgba(59, 91, 219, 0.16), rgba(59, 91, 219, 0) 68%);
  pointer-events: none;
}
.page-hero__inner { position: relative; z-index: 1; max-width: 780px; }
.page-hero__title {
  font-size: clamp(2.3rem, 5.4vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.06;
}
.page-hero__lead {
  margin-top: 22px;
  font-size: clamp(1.08rem, 2.2vw, 1.3rem);
  color: var(--text-muted);
  max-width: 56ch;
  line-height: 1.62;
}

/* Long-form prose block (about page) */
.prose { max-width: 68ch; }
.prose p {
  color: var(--text-muted);
  font-size: 1.08rem;
  line-height: 1.75;
}
.prose p + p { margin-top: 20px; }
.prose h3 {
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin-top: 44px;
  color: var(--text);
}
.prose h3 + p { margin-top: 14px; }

/* =====================================================================
   STAGE LIST — vertical numbered stages (how-it-works page)
   ===================================================================== */
.stages { margin-top: 56px; display: flex; flex-direction: column; gap: 28px; }
.stage {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 36px;
  box-shadow: var(--shadow-sm);
}
.stage__num {
  display: grid;
  place-items: center;
  width: 60px; height: 60px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0;
}
.stage__title { font-size: 1.45rem; letter-spacing: -0.02em; }
.stage__text {
  color: var(--text-muted);
  margin-top: 12px;
  font-size: 1.04rem;
  line-height: 1.7;
}
.stage__text + .stage__text { margin-top: 14px; }

/* =====================================================================
   FORM STATUS — success / error message after a form submit
   ===================================================================== */
.form-status {
  margin-top: 18px;
  padding: 15px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.96rem;
  font-weight: 500;
  display: none;
}
.form-status.is-visible { display: block; }
.form-status--ok {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--accent-hover);
}
.form-status--error {
  background: #fdecec;
  border: 1px solid #f3c2c2;
  color: #b3261e;
}
/* Disabled submit state while sending */
.btn[disabled] { opacity: 0.65; cursor: not-allowed; transform: none; }

/* Honeypot field — kept out of sight and out of the tab order, but still
   present in the DOM so spam bots fill it in and give themselves away. */
.form-hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 560px) {
  .stage { grid-template-columns: 1fr; gap: 20px; padding: 30px 24px; }
  .stage__title { font-size: 1.3rem; }
}

/* Current-page marker in the slide-out menu */
.nav__panel-links a.is-active { color: var(--accent); }
.nav__panel-links a.is-active .arrow { opacity: 1; transform: translateX(0); }