/* =========================================================
   Two Rivers Corp. — "Confluence"
   Design tokens
   ========================================================= */
:root {
  /* Palette — two rivers on a clean, near-white ground */
  --paper:      #FBFCFD;   /* near-white ground */
  --paper-2:    #ECF1F3;   /* raised panel */
  --ink:        #12262E;   /* deep slate text */
  --deep:       #0D2C37;   /* deep-river dark sections */
  --deep-2:     #0A222B;   /* deepest river */
  --teal:       #009FD6;   /* cool current (blue) */
  --teal-deep:  #0072A3;   /* readable blue for labels/accents on light */
  --gold:       #403770;   /* warm current (deep violet) */
  --gold-soft:  #9D92D1;   /* light violet for use on dark sections */
  --muted:      #5A727A;   /* secondary text */
  --muted-dark: #9FBAC1;   /* secondary text on dark */
  --line:       rgba(18, 38, 46, 0.12);
  --line-dark:  rgba(255, 255, 255, 0.14);

  /* Type */
  --display: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --maxw: 1160px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* =========================================================
   Reset & base
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-weight: 500; line-height: 1.08; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }

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

.skip-link {
  position: absolute; left: 1rem; top: -3rem; z-index: 200;
  background: var(--ink); color: #fff; padding: 0.6rem 1rem; border-radius: 8px;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

/* Shared type helpers */
.eyebrow, .section-kicker {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal-deep);
}
.section-kicker.on-dark { color: var(--gold-soft); }

.section-title {
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: -0.02em;
}
.section-title.on-dark { color: var(--paper); }
.section-title em { font-style: italic; color: var(--teal-deep); }

.section-sub {
  color: var(--muted);
  font-size: 1.075rem;
  max-width: 52ch;
}
.section-sub.on-dark { color: var(--muted-dark); }

.section-head { max-width: 60ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-head .section-kicker { display: block; margin-bottom: 0.9rem; }
.section-head .section-title { margin-bottom: 1rem; }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: #fff;
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--sans); font-weight: 700; font-size: 0.98rem;
  padding: 0.85rem 1.5rem; border-radius: 100px;
  background: var(--btn-bg); color: var(--btn-fg);
  border: 1.5px solid var(--btn-bg);
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease), color 0.25s var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -12px rgba(13, 44, 55, 0.55); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }

.btn-ghost {
  --btn-bg: transparent; --btn-fg: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--teal); color: var(--teal-deep); box-shadow: none; }

.btn-header { padding: 0.7rem 1.3rem; font-size: 0.92rem; }
.btn-block { width: 100%; justify-content: center; padding: 1rem 1.5rem; }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
}
.header-inner {
  display: flex; align-items: center; gap: 1.5rem;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 0.6rem; margin-right: auto; }
.brand-mark { width: 34px; height: 34px; flex: none; object-fit: contain; border-radius: 6px; }
.brand-name {
  font-family: var(--display); font-size: 1.28rem; font-weight: 600;
  letter-spacing: -0.01em; line-height: 1;
}
.brand-corp {
  font-family: var(--sans); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); margin-left: 0.4rem; vertical-align: 0.15em;
}

.nav { display: flex; gap: 1.75rem; }
.nav a {
  font-weight: 600; font-size: 0.95rem; color: var(--muted);
  position: relative; padding: 0.3rem 0;
  transition: color 0.2s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--gold); transition: width 0.25s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; justify-content: center;
  width: 44px; height: 44px; background: none; border: none; cursor: pointer; padding: 0;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin-inline: auto; transition: transform 0.3s var(--ease), opacity 0.2s 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); }

.mobile-menu {
  display: flex; flex-direction: column; gap: 0.25rem;
  padding: 1rem var(--gutter) 1.75rem;
  border-top: 1px solid var(--line);
  background: var(--paper);
}
.mobile-menu[hidden] { display: none; }
.mobile-menu a { padding: 0.75rem 0; font-weight: 600; color: var(--ink); border-bottom: 1px solid var(--line); }
.mobile-menu a.btn { border: 1.5px solid var(--ink); margin-top: 0.75rem; }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative; overflow: hidden;
  padding-block: clamp(3.5rem, 9vw, 7rem) clamp(4rem, 9vw, 7.5rem);
  background: var(--paper)
    url('https://images.unsplash.com/photo-1683728315428-5e66f19adf4f?auto=format&fit=crop&w=2400&q=70')
    center right / cover no-repeat;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: linear-gradient(
    100deg,
    rgba(251, 252, 253, 0.95) 0%,
    rgba(251, 252, 253, 0.86) 42%,
    rgba(251, 252, 253, 0.5) 72%,
    rgba(251, 252, 253, 0.32) 100%
  );
}

.hero-inner { position: relative; z-index: 1; max-width: 40rem; }
.hero .eyebrow { margin-bottom: 1.5rem; }
.hero-title {
  font-family: var(--display);
  font-size: clamp(2.5rem, 6vw, 4.75rem);
  font-weight: 500; letter-spacing: -0.025em; line-height: 0.98;
  max-width: 38rem;
}
.hero-title em { font-style: italic; color: var(--teal-deep); white-space: nowrap; }
.hero-lead {
  margin-top: 1.75rem; font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--muted); max-width: 38rem; line-height: 1.55;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.25rem; }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: clamp(1.5rem, 5vw, 3.5rem);
  margin-top: clamp(3rem, 6vw, 4.5rem);
  padding-top: 2rem; border-top: 1px solid var(--line);
  max-width: 40ch;
}
.hero-stats dt {
  font-family: var(--display); font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 500; color: var(--ink); line-height: 1;
}
.hero-stats .reg { font-size: 0.5em; vertical-align: super; color: var(--gold); }
.hero-stats dd { margin: 0.4rem 0 0; font-size: 0.85rem; color: var(--muted); font-weight: 600; }

/* =========================================================
   Intro
   ========================================================= */
.intro { padding-block: clamp(3rem, 7vw, 5.5rem); border-top: 1px solid var(--line); }
.intro-grid {
  display: block; max-width: 70ch;
}
.intro-lead {
  font-family: var(--display); font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.28; letter-spacing: -0.01em; color: var(--ink);
}
.intro-body { margin-top: 1.5rem; color: var(--muted); font-size: 1.075rem; max-width: 60ch; }

/* =========================================================
   Services
   ========================================================= */
.services { padding-block: clamp(3.5rem, 8vw, 6.5rem); }

/* Change-management capability checklist */
.capability-list {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 0 clamp(1.5rem, 5vw, 4rem);
  border-top: 1px solid var(--line);
}
.capability-list li {
  display: grid; grid-template-columns: auto 1fr; gap: 0.9rem;
  align-items: baseline; align-content: start;
  padding-block: 1.05rem; border-bottom: 1px solid var(--line);
  font-family: var(--display); font-size: clamp(1.1rem, 1.9vw, 1.35rem); color: var(--ink);
}
.capability-list li::before {
  content: ""; width: 16px; height: 10px; align-self: center;
  background: linear-gradient(90deg, var(--teal), var(--gold));
  clip-path: polygon(0 45%, 40% 100%, 100% 0, 82% 0, 38% 62%, 12% 30%);
}

/* Secondary competencies */
.competency-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem;
  margin-top: clamp(2.5rem, 5vw, 4rem);
}
.competency {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2.25rem); background: var(--paper);
}
.competency h3 {
  font-family: var(--display); font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  font-weight: 500; margin-bottom: 0.6rem;
}
.competency > p { color: var(--muted); margin-bottom: 1.25rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag-row li {
  font-size: 0.82rem; font-weight: 600; color: var(--teal-deep);
  background: var(--paper-2); border: 1px solid var(--line);
  padding: 0.35rem 0.75rem; border-radius: 100px;
}

.industries {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.5rem; border-top: 1px solid var(--line);
  font-family: var(--display); font-size: clamp(1.05rem, 2vw, 1.4rem); color: var(--muted);
}
.industries-key {
  display: block; font-family: var(--sans); font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal-deep);
  margin-bottom: 0.5rem;
}

/* =========================================================
   Approach (dark)
   ========================================================= */
.approach {
  background: var(--deep);
  color: var(--paper);
  padding-block: clamp(4rem, 9vw, 7rem);
  position: relative; overflow: hidden;
}
.approach::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(47, 124, 140, 0.28), transparent 55%),
    radial-gradient(90% 80% at 100% 100%, rgba(210, 155, 74, 0.18), transparent 55%);
  pointer-events: none;
}
.approach-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
.approach-intro .section-kicker { display: block; margin-bottom: 1rem; }
.approach-intro .section-sub { margin-top: 1.25rem; }

.approach-steps { counter-reset: step; display: grid; gap: 0; }
.approach-steps li {
  counter-increment: step;
  display: grid; grid-template-columns: auto 1fr; gap: 1.25rem;
  padding-block: 1.5rem; align-items: start;
  border-top: 1px solid var(--line-dark);
}
.approach-steps li:first-child { border-top: none; padding-top: 0; }
.approach-steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--display); font-size: 1.1rem; color: var(--gold-soft);
  padding-top: 0.15rem;
}
.step-label {
  display: block; font-weight: 700; font-size: 1.15rem; color: var(--paper);
  margin-bottom: 0.3rem; letter-spacing: -0.01em;
}
.approach-steps p { color: var(--muted-dark); font-size: 1rem; }

/* =========================================================
   Success stories
   ========================================================= */
.stories { padding-block: clamp(3.5rem, 8vw, 6.5rem); background: var(--paper-2); }
.story-list {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem;
}
.story-card {
  position: relative; overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.75rem, 3.2vw, 2.5rem);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.story-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(var(--teal), var(--gold));
  transform: scaleY(0); transform-origin: top; transition: transform 0.45s var(--ease);
}
.story-card:hover {
  transform: translateY(-4px); border-color: transparent;
  box-shadow: 0 24px 48px -28px rgba(13, 44, 55, 0.45);
}
.story-card:hover::before { transform: scaleY(1); }
.story-metric {
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--teal-deep); margin-bottom: 0.85rem;
}
.story-card h3 {
  font-family: var(--display); font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 500; margin-bottom: 0.75rem; letter-spacing: -0.01em;
}
.story-body { color: var(--muted); font-size: 1rem; line-height: 1.6; }

/* =========================================================
   Credentials
   ========================================================= */
.credentials { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.cred-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.cred-grid li {
  display: flex; flex-direction: column; gap: 0.4rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  transition: background 0.25s var(--ease);
}
.cred-grid li:hover { background: var(--paper-2); }
.cred-title {
  font-family: var(--display); font-size: clamp(1.15rem, 2vw, 1.4rem);
  color: var(--ink); line-height: 1.25;
}
.cred-detail { font-size: 0.9rem; color: var(--muted); }

/* =========================================================
   About
   ========================================================= */
.about { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.about-grid {
  display: grid; grid-template-columns: 1.3fr 0.9fr; gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
.about-copy .section-kicker { display: block; margin-bottom: 1rem; }
.about-copy .section-title { margin-bottom: 1.5rem; }
.about-copy p { color: var(--muted); margin-bottom: 1.1rem; max-width: 56ch; }

.about-facts {
  border-top: 1px solid var(--line);
}
.about-facts li {
  display: flex; flex-direction: column; gap: 0.25rem;
  padding-block: 1.15rem; border-bottom: 1px solid var(--line);
}
.fact-key { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--teal-deep); }
.fact-val { font-family: var(--display); font-size: 1.2rem; color: var(--ink); }

/* =========================================================
   Contact (dark)
   ========================================================= */
.contact {
  background: var(--deep-2); color: var(--paper);
  padding-block: clamp(4rem, 9vw, 7rem);
  position: relative; overflow: hidden;
}
.contact::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(80% 120% at 100% 0%, rgba(210,155,74,0.16), transparent 50%),
              radial-gradient(80% 120% at 0% 100%, rgba(47,124,140,0.22), transparent 50%);
  pointer-events: none;
}
.contact-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 7vw, 5rem);
  align-items: start;
}
.contact-intro .section-kicker { display: block; margin-bottom: 1rem; }
.contact-intro .section-sub { margin-top: 1.25rem; }
.contact-info { margin-top: 2.5rem; display: grid; gap: 1.25rem; }
.contact-info li { display: flex; flex-direction: column; gap: 0.2rem; }
.info-key { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold-soft); }
.contact-info a, .contact-info span:not(.info-key) { color: var(--paper); font-size: 1.1rem; }
.contact-info a:hover { color: var(--gold-soft); text-decoration: underline; text-underline-offset: 3px; }

.contact-form {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  display: grid; gap: 1.15rem;
}
.field { display: grid; gap: 0.4rem; position: relative; }
.field label { font-size: 0.85rem; font-weight: 700; color: var(--paper); letter-spacing: 0.01em; }
.field .optional { color: var(--muted-dark); font-weight: 500; text-transform: none; letter-spacing: 0; }
.field input, .field textarea {
  font-family: var(--sans); font-size: 1rem; color: var(--paper);
  background: rgba(255,255,255,0.06);
  border: 1.5px solid var(--line-dark); border-radius: 10px;
  padding: 0.8rem 0.95rem; resize: vertical;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: rgba(159,186,193,0.7); }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--gold); background: rgba(255,255,255,0.09);
}
.field input:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--gold); outline-offset: 1px; }
.field.invalid input, .field.invalid textarea { border-color: #E48A7B; }
.error { color: #F0A99B; font-size: 0.8rem; min-height: 0; font-weight: 600; }
.counter { position: absolute; right: 2px; top: 2px; font-size: 0.72rem; color: var(--muted-dark); }
.form-success {
  color: var(--gold-soft); font-weight: 600; text-align: center;
  padding: 0.5rem; border: 1px solid var(--line-dark); border-radius: 10px;
  background: rgba(210,155,74,0.08);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--ink); color: var(--paper); padding-block: clamp(2.5rem, 5vw, 4rem) 1.5rem; }
.footer-inner {
  display: grid; grid-template-columns: auto 1fr auto; gap: 1.5rem 2.5rem;
  align-items: center; padding-bottom: 2rem; border-bottom: 1px solid var(--line-dark);
}
.footer-brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--display); font-size: 1.25rem; }
.footer-brand .brand-mark { width: 30px; height: 30px; }
.footer-tag { color: var(--muted-dark); font-size: 0.95rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.25rem; justify-content: flex-end; }
.footer-nav a { color: var(--muted-dark); font-weight: 600; font-size: 0.9rem; transition: color 0.2s var(--ease); }
.footer-nav a:hover { color: var(--gold-soft); }
.footer-base {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding-top: 1.5rem; font-size: 0.82rem; color: var(--muted-dark);
}

/* =========================================================
   Reveal animation
   ========================================================= */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
  .nav, .btn-header { display: none; }
  .nav-toggle { display: flex; }
  .approach-grid, .contact-grid, .about-grid { grid-template-columns: 1fr; }
  .capability-list { grid-template-columns: 1fr; }
  .competency-grid { grid-template-columns: 1fr; }
  .story-list { grid-template-columns: 1fr; }
  .cred-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-nav { justify-content: flex-start; }
  .hero::before {
    background: linear-gradient(
      160deg,
      rgba(251, 252, 253, 0.94) 0%,
      rgba(251, 252, 253, 0.88) 55%,
      rgba(251, 252, 253, 0.66) 100%
    );
  }
}
@media (max-width: 520px) {
  .hero-stats { gap: 1.5rem 2rem; }
  .footer-base { flex-direction: column; gap: 0.35rem; }
}