/*
 * BTR Consult | style.css
 * btrconsult.net
 */

/* =================================================
   VARIABLES
   ================================================= */
:root {
  --color-obsidian: #0B1222;
  --color-ochre: #C5A059;
  --color-slate: #94A3B8;
  --color-blue: #0062FF;
  --color-cloud: #F8FAFC;

  --color-bg-primary: var(--color-cloud);
  --color-bg-dark: var(--color-obsidian);
  --color-text-primary: var(--color-obsidian);
  --color-text-inverse: var(--color-cloud);
  --color-text-secondary: var(--color-slate);
  --color-heading-accent: var(--color-ochre);
  --color-cta: var(--color-blue);
  --color-divider: rgba(148, 163, 184, 0.2);

  --font-display: 'Plus Jakarta Sans', Arial, Helvetica, sans-serif;
  --font-body: 'Inter', Arial, Helvetica, sans-serif;
  --font-accent: 'Instrument Serif', Georgia, serif;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;
  --space-2xl: 120px;

  --max-width: 1200px;
  --nav-height: 72px;
  --border-radius: 4px;
}

/* =================================================
   RESET & BASE
   ================================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

a {
  color: inherit;
}

/* =================================================
   SKIP TO CONTENT
   ================================================= */
.skip-to-content {
  position: absolute;
  top: -200px;
  left: var(--space-sm);
  background: var(--color-blue);
  color: var(--color-cloud);
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  z-index: 9999;
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: top 200ms ease;
}

.skip-to-content:focus {
  top: var(--space-sm);
}

/* =================================================
   CONTAINER
   ================================================= */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 769px) {
  .container { padding: 0 48px; }
}

@media (min-width: 1025px) {
  .container { padding: 0 64px; }
}

/* =================================================
   NAVIGATION
   ================================================= */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-cloud);
  border-bottom: 1px solid var(--color-divider);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 769px) { nav { padding: 0 48px; } }
@media (min-width: 1025px) { nav { padding: 0 64px; } }

/* Logo — dark-background PNG sits in a navy container */
.nav-logo a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-obsidian);
  border-radius: var(--border-radius);
  padding: 4px 10px;
  height: 48px;
  text-decoration: none;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

/* Desktop nav links */
.nav-links {
  display: none;
  align-items: center;
  gap: 40px;
}

.nav-links li a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 16px;
  color: var(--color-obsidian);
  text-decoration: none;
  position: relative;
  padding-bottom: 4px;
}

.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-ochre);
  transition: width 200ms ease;
}

.nav-links li a:hover::after,
.nav-links li a.active::after {
  width: 100%;
}

.nav-links li a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-obsidian);
  border-radius: 1px;
  transition: transform 200ms ease, opacity 200ms ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Mobile drawer */
.nav-drawer {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-cloud);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-md) 24px var(--space-lg);
  z-index: 99;
  display: none;
}

.nav-drawer.open { display: block; }

.nav-drawer ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.nav-drawer ul a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 18px;
  color: var(--color-obsidian);
  text-decoration: none;
  transition: color 200ms ease;
}

.nav-drawer ul a:hover,
.nav-drawer ul a.active {
  color: var(--color-ochre);
}

.nav-drawer ul a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

@media (min-width: 769px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
  .nav-drawer { display: none !important; }
}

/* =================================================
   BUTTONS & LINKS
   ================================================= */
.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border: none;
  cursor: pointer;
  border-radius: var(--border-radius);
  transition: background 200ms ease, transform 200ms ease;
}

.btn-primary {
  background: var(--color-blue);
  color: var(--color-cloud);
  padding: 14px 28px;
  font-size: 16px;
}

.btn-primary:hover {
  background: #004FCC;
  transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0); }

.btn-primary:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 18px;
}

.link-secondary {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  color: rgba(148, 163, 184, 0.85);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 200ms ease;
}

.link-secondary:hover { color: var(--color-cloud); }

.link-secondary:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

.link-arrow {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 16px;
  color: var(--color-blue);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 200ms ease;
}

.link-arrow:hover { gap: 10px; }

.link-arrow:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

/* =================================================
   HERO
   ================================================= */
.hero {
  background: var(--color-obsidian);
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 64px;
}

.hero--home {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: 100px;
}

.hero__content { max-width: 680px; }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--color-cloud);
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.7;
  color: rgba(248, 250, 252, 0.80);
  margin-bottom: var(--space-lg);
  max-width: 520px;
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: flex-start;
}

/* =================================================
   SECTIONS
   ================================================= */
.section {
  padding: var(--space-xl) 0;
}

@media (min-width: 1025px) {
  .section { padding: 100px 0; }
}

.section--dark { background: var(--color-obsidian); }
.section--border-top { border-top: 1px solid var(--color-divider); }
.section--compact { padding: var(--space-lg) 0; }

.section__header { margin-bottom: var(--space-lg); }
.section__header--center { text-align: center; }

/* =================================================
   TYPOGRAPHY
   ================================================= */
h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(28px, 3.5vw, 40px);
  line-height: 1.2;
  color: var(--color-ochre);
}

h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(20px, 2.5vw, 26px);
  line-height: 1.3;
  color: var(--color-obsidian);
}

.section--dark h3 { color: var(--color-cloud); }

p { margin-bottom: var(--space-sm); }
p:last-child { margin-bottom: 0; }

.text-slate { color: var(--color-slate); }
.text-cloud { color: var(--color-cloud); }
.text-ochre { color: var(--color-ochre); }

/* Pull quote — Instrument Serif, max one per page */
.pull-quote {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.55;
  color: var(--color-obsidian);
  border-left: 3px solid var(--color-ochre);
  padding-left: var(--space-md);
  margin: var(--space-lg) 0;
  max-width: 620px;
}

/* =================================================
   PROBLEM SECTION
   ================================================= */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 769px) {
  .problem-grid { grid-template-columns: 1fr 1fr; }
}

.problem-card {
  border: 1px solid var(--color-divider);
  border-left: 3px solid var(--color-slate);
  padding: var(--space-md);
  border-radius: var(--border-radius);
  background: var(--color-cloud);
}

.problem-card__statement {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 17px;
  line-height: 1.45;
  color: var(--color-obsidian);
  margin-bottom: 10px;
}

.problem-card__support {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-slate);
  margin-bottom: 0;
}

/* =================================================
   PROOF METRICS
   ================================================= */
.proof-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 769px) {
  .proof-grid { grid-template-columns: repeat(3, 1fr); }
}

.proof-card {
  text-align: center;
  padding: var(--space-md) var(--space-sm);
}

.proof-metric {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 6vw, 56px);
  line-height: 1;
  color: var(--color-ochre);
  margin-bottom: 14px;
}

.proof-label {
  display: block;
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-cloud);
  margin-bottom: 8px;
}

.proof-case {
  display: block;
  font-size: 13px;
  color: var(--color-slate);
  line-height: 1.4;
}

/* =================================================
   FOUNDRY TIER CARDS (homepage overview)
   ================================================= */
.tier-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 769px) {
  .tier-grid { grid-template-columns: repeat(3, 1fr); }
}

.tier-card {
  background: var(--color-cloud);
  border: 1px solid var(--color-divider);
  border-radius: var(--border-radius);
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
}

.tier-card--featured {
  border-top: 4px solid var(--color-ochre);
  box-shadow: 0 4px 24px rgba(11, 18, 34, 0.10), 0 1px 4px rgba(11, 18, 34, 0.05);
}

.tier-card h3 { font-size: 22px; margin-bottom: var(--space-sm); }

.tier-card__problem {
  font-weight: 500;
  font-size: 17px;
  color: var(--color-obsidian);
  margin-bottom: var(--space-sm);
}

.tier-card__outcome {
  font-size: 15px;
  color: var(--color-slate);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.tier-card__price {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  color: var(--color-ochre);
  margin-bottom: 4px;
}

.tier-card__price-note {
  font-size: 13px;
  color: var(--color-slate);
  margin-bottom: var(--space-md);
}

.tier-card__cta { margin-top: auto; }

/* =================================================
   HOW IT WORKS STEPS
   ================================================= */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 1025px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
}

.step {
  background: var(--color-cloud);
  border: 1px solid var(--color-divider);
  border-radius: var(--border-radius);
  padding: var(--space-md);
}

.step__number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ochre);
  margin-bottom: var(--space-xs);
}

.step h3 { font-size: 18px; margin-bottom: var(--space-xs); }

.step p {
  font-size: 15px;
  color: var(--color-slate);
  line-height: 1.55;
  margin-bottom: 0;
}

/* =================================================
   CREDIBILITY ANCHOR
   ================================================= */
.credibility {
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.credibility p {
  font-size: 18px;
  line-height: 1.65;
  color: var(--color-obsidian);
  max-width: 720px;
}

/* =================================================
   CTA BAND
   ================================================= */
.cta-band {
  background: var(--color-obsidian);
  padding: var(--space-xl) 0;
  text-align: center;
}

.cta-band h2 {
  color: var(--color-cloud);
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: var(--space-sm);
}

.cta-band p {
  color: rgba(248, 250, 252, 0.72);
  font-size: 18px;
  margin-bottom: var(--space-lg);
}

/* =================================================
   FOUNDRY DETAIL PAGE
   ================================================= */
.tier-section { border-bottom: 1px solid var(--color-divider); }
.tier-section:last-of-type { border-bottom: none; }

.tier-detail { max-width: 760px; }

.tier-detail__problem {
  font-size: 18px;
  color: var(--color-obsidian);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.tier-detail__pricing { margin: var(--space-md) 0; }

.tier-detail__price-main {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 28px;
  color: var(--color-ochre);
  margin-bottom: 6px;
}

.tier-detail__price-note {
  display: block;
  font-size: 15px;
  color: var(--color-slate);
}

.deliverables {
  margin: var(--space-md) 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.deliverables li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 16px;
  color: var(--color-obsidian);
  line-height: 1.5;
}

.deliverables li::before {
  content: '—';
  color: var(--color-ochre);
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 1px;
}

.tier-proof-callout {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: rgba(11, 18, 34, 0.04);
  border-left: 3px solid var(--color-ochre);
  padding: var(--space-sm) var(--space-md);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  margin: var(--space-md) 0;
}

.tier-proof-callout .metric {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 36px;
  color: var(--color-ochre);
  line-height: 1;
  flex-shrink: 0;
}

.tier-proof-callout .metric-body { flex: 1; }

.tier-proof-callout .metric-label {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-obsidian);
  line-height: 1.4;
  display: block;
}

.tier-proof-callout .metric-case {
  font-size: 13px;
  color: var(--color-slate);
  display: block;
  margin-top: 4px;
}

/* =================================================
   FAQ ACCORDION
   ================================================= */
.faq { max-width: 800px; }

.faq details {
  border-bottom: 1px solid var(--color-divider);
}

.faq details:first-child {
  border-top: 1px solid var(--color-divider);
}

.faq summary {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  color: var(--color-obsidian);
  padding: var(--space-md) 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  transition: color 200ms ease;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: '+';
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--color-ochre);
  flex-shrink: 0;
  transition: transform 200ms ease;
}

.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { color: var(--color-ochre); }

.faq summary:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

.faq-answer {
  font-size: 16px;
  color: var(--color-slate);
  line-height: 1.7;
  padding-bottom: var(--space-md);
  max-width: 680px;
}

/* =================================================
   ABOUT PAGE
   ================================================= */
.beliefs-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: 720px;
}

.belief p {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-obsidian);
}

.how-we-work { max-width: 720px; }

.how-we-work p {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-obsidian);
}

.bio-layout {
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-lg);
  align-items: flex-start;
}

@media (min-width: 769px) {
  .bio-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-xl);
  }

  .bio-content { flex: 1; }

  .bio-image { flex-shrink: 0; }
}

.bio-image img {
  width: 200px;
  height: 250px;
  object-fit: cover;
  object-position: top center;
  border-radius: 8px;
}

@media (min-width: 769px) {
  .bio-image img {
    width: 240px;
    height: 300px;
  }
}

.bio-content h3 { margin-bottom: var(--space-sm); }

.bio-content p {
  font-size: 17px;
  color: var(--color-obsidian);
  line-height: 1.7;
}

.bio-meta {
  margin-bottom: var(--space-md);
}

.bio-meta span {
  font-size: 14px;
  color: var(--color-slate);
}

/* =================================================
   CONTACT PAGE
   ================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 769px) {
  .contact-grid { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
}

.contact-col h3 { margin-bottom: var(--space-sm); }

.contact-col > p {
  font-size: 16px;
  color: var(--color-slate);
  margin-bottom: var(--space-md);
  line-height: 1.65;
}

/* Form */
.form-group { margin-bottom: var(--space-md); }

.form-group label {
  display: block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-obsidian);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-obsidian);
  background: var(--color-cloud);
  border: 1px solid var(--color-slate);
  border-radius: var(--border-radius);
  padding: 12px var(--space-sm);
  transition: border-color 200ms ease, box-shadow 200ms ease;
  -webkit-appearance: none;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(0, 98, 255, 0.12);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(148, 163, 184, 0.65);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
  line-height: 1.55;
}

.direct-contact { margin-top: var(--space-xl); }

.direct-contact h3 { font-size: 22px; margin-bottom: var(--space-md); }

.direct-contact address { font-style: normal; }

.direct-contact a {
  display: block;
  font-size: 16px;
  color: var(--color-blue);
  text-decoration: none;
  margin-bottom: 12px;
  transition: color 200ms ease;
}

.direct-contact a:hover { color: #004FCC; }

.direct-contact a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

/* =================================================
   FOOTER
   ================================================= */
footer {
  background: var(--color-obsidian);
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-bottom: var(--space-lg);
}

@media (min-width: 769px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-lg);
  }
}

/* Logo in footer: screen blend mode makes dark bg transparent on navy */
.footer-logo img {
  height: 36px;
  width: auto;
  mix-blend-mode: screen;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-nav a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-cloud);
  text-decoration: none;
  transition: color 200ms ease;
}

.footer-nav a:hover { color: var(--color-ochre); }

.footer-nav a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact a {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-slate);
  text-decoration: none;
  transition: color 200ms ease;
}

.footer-contact a:hover { color: var(--color-cloud); }

.footer-contact a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding-top: var(--space-md);
}

.footer-bottom p {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--color-slate);
  margin-bottom: 0;
}

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

/* =================================================
   SCROLL REVEAL ANIMATIONS
   ================================================= */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 400ms ease-out, transform 400ms ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}