/* ==========================================================================
   BKS Accounting & Advisory — design tokens
   ========================================================================== */

:root {
  /* Color */
  --brand: #002060;
  --brand-2: #0B3A8C;
  --ink: #0B1E3B;
  --paper: #F5F7FA;
  --paper-alt: #ECF0F6;
  --white: #FFFFFF;
  --emerald: #2F6F5E;
  --emerald-tint: #E7F1EC;
  --brass: #B08D57;
  --brass-tint: #F4EBDC;
  --line: #DBE1EC;
  --line-invert: rgba(255, 255, 255, 0.16);
  --text-muted: #59637A;
  --ice: #C3CEE3;

  /* Type */
  --font-display: "Fraunces", ui-serif, Georgia, serif;
  --font-body: "Public Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Spacing scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;
  --space-8: 8rem;

  /* Layout */
  --container: 1240px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 200ms;
  --dur-med: 500ms;
  --dur-slow: 800ms;
}

/* ==========================================================================
   Reset
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@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;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); font-weight: 600; line-height: 1.15; color: var(--brand); }
p { margin: 0 0 var(--space-2); }
button { font: inherit; cursor: pointer; }
input, textarea { font: inherit; }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--white);
  color: var(--brand);
  padding: var(--space-1) var(--space-2);
  z-index: 999;
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

:focus-visible {
  outline: 2.5px solid var(--brass);
  outline-offset: 3px;
}

/* ==========================================================================
   Type helpers
   ========================================================================== */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--emerald);
  margin: 0 0 var(--space-2);
  position: relative;
  padding-bottom: var(--space-2);
}
.eyebrow::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 56px; height: 2px;
  background: var(--brass);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-slow) var(--ease-out);
}
.reveal.is-visible .eyebrow::after,
.eyebrow.is-visible::after { transform: scaleX(1); }

.eyebrow-invert { color: var(--brass); }

.section-head { max-width: 640px; margin: 0 0 var(--space-6); }
.section-head h2 { font-size: clamp(1.9rem, 2.6vw + 1rem, 2.5rem); margin-bottom: var(--space-2); }
.section-sub { color: var(--text-muted); font-size: 1.0625rem; max-width: 52ch; }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary { background: var(--brand); color: var(--white); }
.btn-primary:hover { background: var(--brand-2); }

.btn-accent { background: var(--brass); color: var(--brand); }
.btn-accent:hover { background: #c19d69; }

.btn-outline { background: transparent; color: var(--brand); border-color: var(--line); }
.btn-outline:hover { border-color: var(--brand); }

.btn-ghost-invert { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.4); }
.btn-ghost-invert:hover { border-color: var(--white); }

.btn-sm { padding: 0.6rem 1.1rem; font-size: 0.875rem; }
.btn-block { width: 100%; }

/* ==========================================================================
   Header / nav
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.site-header.is-scrolled {
  border-color: var(--line);
  box-shadow: 0 8px 24px rgba(11, 30, 59, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
  gap: var(--space-4);
}

.brand-logo { height: 100px; width: auto; }

.main-nav ul { display: flex; gap: var(--space-5); }
.main-nav a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  position: relative;
  padding-bottom: 4px;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--brass);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out);
}
.main-nav a:hover::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: var(--space-3); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--brand);
  margin: 0 auto;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.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-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-3) var(--space-5);
  background: var(--white);
  border-top: 1px solid var(--line);
}
.mobile-nav ul { display: flex; flex-direction: column; gap: var(--space-3); }
.mobile-nav ul a { font-weight: 600; font-size: 1.05rem; color: var(--brand); }
.mobile-nav.is-open { display: flex; }

@media (max-width: 860px) {
  .main-nav, .header-actions .btn-primary { display: none; }
  .nav-toggle { display: flex; }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  background: var(--brand);
  overflow: hidden;
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.hero-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.055) 0px,
    rgba(255,255,255,0.055) 1px,
    transparent 1px,
    transparent 48px
  );
  mask-image: linear-gradient(to bottom, transparent, black 12%, black 88%, transparent);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-6);
  align-items: center;
}

.hero-title {
  display: block;
  color: var(--white);
  font-size: clamp(2.6rem, 4vw + 1.2rem, 4.1rem);
  margin-bottom: var(--space-3);
}
.hero-title span { display: block; }

.hero-sub {
  color: var(--ice);
  font-size: 1.15rem;
  max-width: 46ch;
  margin-bottom: var(--space-4);
}

.hero-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.hero-photo-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3.1;
  box-shadow: 0 30px 60px -20px rgba(0, 8, 24, 0.55);
}
.hero-photo-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--brand);
  mix-blend-mode: color;
  opacity: 0.78;
}
.hero-photo-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, transparent 40%, rgba(0,8,24,0.5));
  z-index: 2;
}
.hero-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.5) contrast(1.08) brightness(1.05);
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .hero-photo-frame { aspect-ratio: 16 / 10; }
}

/* ==========================================================================
   Value strip
   ========================================================================== */

.value-strip {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}
.value-item h3 {
  font-size: 1.15rem;
  margin-bottom: var(--space-1);
}
.value-item p { color: var(--text-muted); margin: 0; }

@media (max-width: 760px) {
  .value-grid { grid-template-columns: 1fr; gap: var(--space-4); padding-top: var(--space-5); padding-bottom: var(--space-5); }
}

/* ==========================================================================
   Generic section
   ========================================================================== */

.section { padding: var(--space-7) 0; }
#services, #pricing, #about, #contact { scroll-margin-top: 100px; }
.section-alt { background: var(--paper); }

/* ==========================================================================
   Services
   ========================================================================== */

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.service-card {
  background: var(--white);
  padding: var(--space-4);
  transition: background var(--dur-fast) var(--ease-out);
}
.service-card:hover { background: var(--paper); }

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--emerald-tint);
  color: var(--emerald);
  margin-bottom: var(--space-3);
}
.service-icon svg { width: 22px; height: 22px; }

.service-card h3 { font-size: 1.05rem; margin-bottom: var(--space-1); }
.service-card p { color: var(--text-muted); font-size: 0.95rem; margin: 0; }

@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .services-grid { grid-template-columns: 1fr; }
  #services.section { padding: var(--space-4) 0; }
  #services .section-head { margin-bottom: var(--space-3); }
  #services .service-card { padding: var(--space-3); }
  #services .service-icon { width: 36px; height: 36px; margin-bottom: var(--space-2); }
  #services .service-icon svg { width: 18px; height: 18px; }
}

/* ==========================================================================
   About
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--space-6);
  align-items: center;
}

.about-photo-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  box-shadow: 0 24px 48px -20px rgba(11, 30, 59, 0.25);
}
.about-photo-frame::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--brand);
  mix-blend-mode: color;
  opacity: 0.7;
}
.about-photo-frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.4) contrast(1.05);
}

.about-copy h2 { margin-bottom: var(--space-3); }
.about-copy p { color: var(--ink); }
.about-copy > p:not(.eyebrow):not(.section-sub) { color: var(--text-muted); }

.founder-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}
.founder-photo {
  width: 64px; height: 64px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.founder-name { font-weight: 700; margin: 0; color: var(--brand); }
.founder-title { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-media { max-width: 360px; }
}

/* ==========================================================================
   Pricing
   ========================================================================== */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  align-items: stretch;
}

.price-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
}

.price-card-featured {
  border-color: var(--brass);
  box-shadow: 0 24px 48px -24px rgba(176, 141, 87, 0.45);
  transform: translateY(-8px);
}

.price-badge {
  position: absolute;
  top: -13px; left: var(--space-4);
  background: var(--brass);
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
}

.price-card-head h3 { font-size: 1.4rem; margin-bottom: var(--space-1); }
.price-card-head p { color: var(--text-muted); font-size: 0.92rem; min-height: 3.4em; }

.price-tag {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--emerald);
  font-weight: 600;
  padding: var(--space-2) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--space-3);
}

.ledger-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-4);
}
.ledger-list li {
  position: relative;
  padding: 0.6rem 0 0.6rem 1.7rem;
  border-bottom: 1px dashed var(--line);
  font-size: 0.94rem;
}
.ledger-list li:last-child { border-bottom: none; }
.ledger-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 1rem;
  width: 14px; height: 8px;
  border-left: 2px solid var(--emerald);
  border-bottom: 2px solid var(--emerald);
  transform: rotate(-45deg);
}

@media (max-width: 900px) {
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .price-card-featured { transform: none; }
}

/* ==========================================================================
   CTA band
   ========================================================================== */

.cta-band {
  background: var(--brand);
  background-image:
    repeating-linear-gradient(to bottom, rgba(255,255,255,0.05) 0px, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 48px);
}
.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  flex-wrap: wrap;
}
.cta-band-inner h2 {
  color: var(--white);
  font-size: clamp(1.6rem, 2.4vw + 1rem, 2.2rem);
  max-width: 32ch;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-6);
}

.contact-details { margin-top: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); }
.contact-details li { display: flex; align-items: center; gap: var(--space-2); }
.contact-details a { font-weight: 600; font-size: 1.05rem; }
.contact-details a:hover { color: var(--emerald); }
.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--brass-tint);
  color: var(--brass);
  flex-shrink: 0;
}
.contact-icon svg { width: 18px; height: 18px; }

.contact-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.form-row { margin-bottom: var(--space-3); }
.form-row-split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.form-row label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
}
.form-row input, .form-row textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--ink);
  resize: vertical;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.form-row input:focus, .form-row textarea:focus {
  border-color: var(--brand);
  outline: none;
}
.form-status {
  margin: var(--space-2) 0 0;
  font-size: 0.9rem;
  text-align: center;
}
.form-status:empty { display: none; }
.form-status.is-success { color: var(--emerald); font-weight: 600; }
.form-status.is-error { color: #A6321F; font-weight: 600; }
.contact-form button[disabled] { opacity: 0.6; cursor: wait; transform: none; }

@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-row-split { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--brand);
  color: var(--ice);
  padding-top: var(--space-6);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--line-invert);
}
.footer-logo-chip {
  display: inline-flex;
  align-items: center;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 0.7rem 1.1rem;
  box-shadow: 0 12px 28px rgba(0, 8, 24, 0.35);
  margin-bottom: var(--space-3);
}
.footer-logo { height: 34px; width: auto; }
.footer-brand p { max-width: 32ch; color: var(--ice); }
.footer-nav ul { display: flex; flex-direction: column; gap: 0.7rem; }
.footer-nav a:hover { color: var(--brass); }
.footer-contact { display: flex; flex-direction: column; gap: 0.7rem; align-items: flex-start; }
.footer-contact a:hover { color: var(--brass); }

.footer-bottom {
  padding-top: var(--space-3);
  padding-bottom: var(--space-4);
  font-size: 0.85rem;
  color: rgba(195, 206, 227, 0.65);
}

@media (max-width: 760px) {
  .footer-inner { grid-template-columns: 1fr; gap: var(--space-4); }
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
  transition-delay: calc(var(--reveal-delay, 0) * 90ms);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}