/*
 * ═══════════════════════════════════════════════════════════════════════════
 * PSCA & CO. — GLOBAL COMPONENTS  v1.0
 * ───────────────────────────────────────────────────────────────────────────
 * Covers: Navigation · Running Banner · Footer · Disclaimer Popup
 * Requires: tokens.css loaded before this file
 * ═══════════════════════════════════════════════════════════════════════════
 */

/* ── Trajan Pro — local font (matches letterhead & stationery) ── */
@font-face {
  font-family: 'Trajan Pro';
  src: url('../fonts/TrajanPro-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Trajan Pro';
  src: url('../fonts/TrajanPro-Bold.otf') format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ───────────────────────────────────────────────────────────────────────────
   SKIP LINK — WCAG 2.4.1 (keyboard bypass)
─────────────────────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: var(--space-2);
  z-index: calc(var(--z-modal) + 1);
  background: var(--color-navy);
  color: var(--color-gold);
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--text-body-sm-size);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: var(--radius-sm);
  /* Hidden off-screen until focused */
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
  width: 1px;
  height: 1px;
}

.skip-link:focus {
  clip: auto;
  clip-path: none;
  overflow: visible;
  width: auto;
  height: auto;
}


/* ───────────────────────────────────────────────────────────────────────────
   BASE RESET & BODY
─────────────────────────────────────────────────────────────────────────── */
body {
  font-family: var(--font-sans);
  background: var(--color-surface-page);
  color: var(--color-text-primary);
  overflow-x: hidden;
  margin: 0;                        /* remove browser default 8px margin */
  padding-top: var(--nav-height);   /* offset for fixed nav */
}


/* ═══════════════════════════════════════════════════════════════════════════
   COMPONENT 1 — NAVIGATION
═══════════════════════════════════════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-sticky);
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: var(--nav-backdrop);
  -webkit-backdrop-filter: var(--nav-backdrop);
  border-bottom: 1px solid var(--color-rule-gold);
  display: flex;
  align-items: center;
  padding: 0 var(--space-10);
  transition: background var(--transition-base);
}

.nav--scrolled {
  background: rgba(21, 32, 56, 0.98);
}

/* Logo — stacked lockup matching letterhead (Trajan Pro) */
.nav__logo {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  text-decoration: none;
  flex-shrink: 0;
}

/* PSCA row: rule — PSCA — rule */
.nav__logo-psca-row {
  display: flex;
  align-items: center;
}

.nav__logo-psca-rule {
  flex: 1;
  height: 1px;
  background: var(--color-on-dark-ghost); /* [P3] was rgba raw; token (exact match 0.45) */
  min-width: 8px;
}

.nav__logo-psca-text {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-weight: 400;
  font-style: normal;
  font-size: 1.55rem;
  letter-spacing: 0.2em;
  line-height: 1;
  color: var(--color-text-inverse);
  padding: 0 6px;
  flex-shrink: 0;
}

/* & Co — italic, sized to ~85% of PSCA (matching letterhead proportions) */
.nav__logo-co {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-weight: 400;
  font-style: italic;
  font-size: 1.33rem;
  letter-spacing: 0.18em;
  line-height: 1.1;
  color: var(--color-gold);
  text-align: center;
  padding-top: 1px;
}

.nav__logo-amp {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-style: italic;
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* Horizontal rule between & Co and Chartered Accountants */
.nav__logo-rule {
  display: block;
  height: 1px;
  background: var(--color-on-dark-ghost); /* [P3] was rgba raw; token */
  margin-top: 3px;
}

/* CHARTERED ACCOUNTANTS tagline */
.nav__logo-tagline {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-weight: 400;
  font-style: normal;
  font-size: 0.42rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  text-align: center;
  line-height: 1;
  color: var(--color-on-dark-caption); /* [P3] was rgba raw; token (0.62 nearest) */
  padding-top: 3px;
}

/* Centre links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.nav__links a {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--nav-text);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-gold-hover);
}

/* CTA button */
.nav__cta {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primitive-navy-900);
  background: var(--color-gold);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-sm);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background var(--transition-fast), transform 120ms ease-out;
}

.nav__cta:hover {
  background: var(--color-gold-hover);
}

.nav__cta:active {
  transform: scale(0.97);
}

/* LinkedIn follow button — ghost outline variant */
.nav__follow {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-sm);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: var(--space-2);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.nav__follow:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* Hamburger (mobile) — 44×44 touch target per WCAG 2.5.5; visual bars remain 28px */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text-inverse);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav__hamburger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile overlay — visibility approach preserves CSS transitions */
.nav__overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-sticky) - 1);
  background: var(--color-navy-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  /* Hidden state */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  /* Delay visibility:hidden until fade finishes */
  transition: opacity 250ms cubic-bezier(0.23, 1, 0.32, 1),
              transform 250ms cubic-bezier(0.23, 1, 0.32, 1),
              visibility 0s linear 250ms;
}

.nav__overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  /* Visibility: visible fires immediately on open */
  transition: opacity 250ms cubic-bezier(0.23, 1, 0.32, 1),
              transform 250ms cubic-bezier(0.23, 1, 0.32, 1),
              visibility 0s linear 0s;
}

.nav__overlay .nav__links {
  flex-direction: column;
  gap: var(--space-8);
  margin: 0;
  padding: 0;
  text-align: center;
}

.nav__overlay .nav__links a {
  font-size: 1rem;
  letter-spacing: 0.15em;
}

.nav__overlay .nav__cta {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-8);
  font-size: 0.8rem;
}

.nav__overlay .nav__follow {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-left: 0;
  margin-top: 0;
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.nav__overlay .nav__follow:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* Services dropdown hint — for future use */
.nav__links li { position: relative; }

/* Responsive — tighten at medium widths to accommodate 8 nav items */
@media (max-width: 1440px) {
  .nav { padding: 0 var(--space-6); }
  .nav__links { gap: var(--space-5); }
}

/* Condense further at smaller desktops — shorter gap + slightly smaller font */
@media (max-width: 1320px) {
  .nav__links { gap: var(--space-3); }
  .nav__links a { font-size: 0.70rem; }
}

/* Collapse to hamburger — below 1200px the 8 items no longer fit */
@media (max-width: 1200px) {
  .nav__links,
  .nav__cta,
  .nav__follow { display: none; }
  .nav__hamburger { display: flex; }
}


/* ═══════════════════════════════════════════════════════════════════════════
   COMPONENT 2 — RUNNING BANNER / TICKER
═══════════════════════════════════════════════════════════════════════════ */

.ticker {
  width: 100%;
  height: var(--banner-height);
  background: var(--banner-bg);
  overflow: hidden;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-gold-a15);
}

.ticker__track {
  display: flex;
  align-items: center;
  white-space: nowrap;
  animation: ticker-scroll var(--banner-speed) linear infinite;
  will-change: transform;
}

.ticker:hover .ticker__track {
  animation-play-state: paused;
}

.ticker__item {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--banner-text); /* [P3] was rgba raw; component token (0.85) */
  padding: 0 var(--space-6);
  flex-shrink: 0;
}

.ticker__sep {
  color: var(--color-gold);
  font-size: 0.5rem;
  flex-shrink: 0;
}

@keyframes ticker-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}


/* ═══════════════════════════════════════════════════════════════════════════
   COMPONENT 3 — FOOTER
═══════════════════════════════════════════════════════════════════════════ */

.footer {
  background: var(--color-surface-darker);
  border-top: 1px solid var(--color-gold-a20);
  padding-top: var(--space-16);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
}

/* Column 1 — Brand */
.footer__brand {}

/* Footer logo — full Trajan Pro stacked lockup */
.footer__logo {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  margin-bottom: var(--space-5);
}

.footer__logo-psca-row {
  display: flex;
  align-items: center;
}

.footer__logo-psca-rule {
  flex: 1;
  height: 1px;
  background: var(--color-on-dark-ghost); /* [P3] was rgba raw; token (exact match 0.45) */
  min-width: 12px;
}

.footer__logo-psca-text {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-weight: 400;
  font-style: normal;
  font-size: 1.75rem;
  letter-spacing: 0.2em;
  line-height: 1;
  color: var(--color-text-inverse);
  padding: 0 8px;
  flex-shrink: 0;
}

/* & Co — italic, ~85% of PSCA size (2.4/2.8 ratio from letterhead) */
.footer__logo-co {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-weight: 400;
  font-style: italic;
  font-size: 1.5rem;
  letter-spacing: 0.18em;
  line-height: 1.1;
  color: var(--color-gold);
  text-align: center;
  padding-top: 2px;
}

.footer__logo-amp {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-style: italic;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.footer__logo-divider {
  display: block;
  height: 1px;
  background: var(--color-gold-a45);
  margin-top: var(--space-2);
}

.footer__logo-tagline {
  font-family: 'Trajan Pro', 'Cormorant Garamond', Georgia, serif;
  font-weight: 400;
  font-style: normal;
  font-size: 0.52rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-on-dark-ghost); /* [P3] was rgba raw; token (exact match 0.45) */
  line-height: 1;
  padding-top: 3px;
}

.footer__tagline {
  font-family: var(--font-sans);
  font-size: var(--text-body-sm-size);
  color: var(--color-on-dark-muted); /* [P1] was rgba(0.45) ~3.9:1 fail; 0.55 gives ~5.1:1 AA pass */
  line-height: 1.6;
  margin-bottom: var(--space-5);
  max-width: 220px;
}

/* CA India Logo — actual ICAI logo image */
.footer__ca-logo-img {
  display: block;
  height: 52px;
  width: auto;
  margin-top: var(--space-4);
  opacity: 0.88;
}

/* Columns 2 & 3 — Links */
.footer__col-title {
  font-family: var(--font-sans);
  font-size: var(--text-label-size);
  font-weight: var(--text-label-weight);
  letter-spacing: var(--text-label-ls);
  text-transform: var(--text-label-transform);
  color: var(--color-gold);
  margin-bottom: var(--space-5);
  display: block;
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-family: var(--font-sans);
  font-size: var(--text-body-sm-size);
  color: var(--color-on-dark-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-gold-hover);
}

/* Column 4 — Contact */
.footer__contact-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

/* [P1] Was rgba(255,255,255,0.35) → ~3.5:1 fail; 0.55 gives ~5.1:1 AA pass */
.footer__contact-label {
  font-family: var(--font-sans);
  font-size: var(--text-caption-size);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-on-dark-muted);
}

.footer__contact-value {
  font-family: var(--font-sans);
  font-size: var(--text-body-sm-size);
  color: var(--color-on-dark-body); /* [P2] was rgba(0.7) raw; token (0.78 nearest, ~11:1) */
  text-decoration: none;
  line-height: 1.5;
  transition: color var(--transition-fast);
}

a.footer__contact-value:hover {
  color: var(--color-gold-hover);
}

/* LinkedIn */
.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--color-rule-light);
  border-radius: var(--radius-sm);
  color: var(--color-on-dark-muted);
  text-decoration: none;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.footer__social-link:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.footer__social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* Bottom strip */
.footer__bottom {
  border-top: 1px solid var(--color-on-dark-floor);
  padding: var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* [P2] Was rgba(255,255,255,0.28) → ~2.8:1 fail on legal text; 0.55 gives ~5.1:1 AA pass */
.footer__disclaimer {
  font-family: var(--font-sans);
  font-size: var(--text-caption-size);
  color: var(--color-on-dark-muted);
  line-height: 1.6;
  letter-spacing: 0.02em;
}

.footer__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* [P2] Was rgba(255,255,255,0.28) — same fix as disclaimer above */
.footer__meta-left,
.footer__meta-right {
  font-family: var(--font-sans);
  font-size: var(--text-caption-size);
  color: var(--color-on-dark-muted);
  letter-spacing: 0.04em;
}

/* Footer responsive */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }
}

@media (max-width: 600px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .footer__meta {
    flex-direction: column;
    align-items: flex-start;
  }
}


/* ═══════════════════════════════════════════════════════════════════════════
   COMPONENT 4 — ICAI DISCLAIMER POPUP
═══════════════════════════════════════════════════════════════════════════ */

.popup-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: var(--popup-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  animation: popup-fade-in 0.4s ease forwards;
}

.popup-overlay.is-hidden {
  display: none;
}

.popup-card {
  background: var(--popup-bg);
  border-top: var(--popup-border-top);
  border-radius: var(--popup-radius);
  max-width: var(--popup-max-width);
  width: 100%;
  padding: var(--popup-padding);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  animation: popup-scale-in 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.popup__overline {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-label-size);
  font-weight: var(--text-label-weight);
  letter-spacing: var(--text-label-ls);
  text-transform: var(--text-label-transform);
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.popup__heading {
  font-family: var(--font-serif);
  font-size: var(--text-h2-size);
  font-weight: var(--text-h2-weight);
  line-height: var(--text-h2-lh);
  color: var(--color-navy);
  margin-bottom: var(--space-4);
}

.popup__rule {
  display: block;
  width: 48px;
  height: 2px;
  background: var(--color-gold);
  margin-bottom: var(--space-6);
}

.popup__body {
  font-family: var(--font-sans);
  font-size: var(--text-body-size);
  line-height: var(--text-body-lh);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.popup__btn {
  display: block;
  width: 100%;
  padding: var(--space-4) var(--space-6);
  background: var(--color-gold);
  color: var(--primitive-navy-900);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast), transform 120ms ease-out;
  text-align: center;
}

.popup__btn:hover {
  background: var(--color-gold-hover);
}

.popup__btn:active {
  transform: scale(0.97);
}

@keyframes popup-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes popup-scale-in {
  from { transform: scale(0.94); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}


/* ═══════════════════════════════════════════════════════════════════════════
   REDUCED MOTION — Respect user's system preference
   Disables non-essential animation for users who have requested it.
═══════════════════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  /* Pause the ticker */
  .ticker__track {
    animation-play-state: paused;
  }

  /* Kill popup keyframe animations — just appear instantly */
  .popup-overlay {
    animation: none;
    opacity: 1;
  }
  .popup-card {
    animation: none;
    transform: none;
  }

  /* Nav overlay — no slide-in motion */
  .nav__overlay,
  .nav__overlay.is-open {
    transform: none;
    transition: opacity 150ms linear, visibility 0s linear 150ms;
  }
  .nav__overlay.is-open {
    transition: opacity 150ms linear, visibility 0s linear 0s;
  }
}