/* ==========================================================
   PIYAVARA — component styles
   ========================================================== */

/* ---------- Info strip (mandatory top bar) ---------- */
.info-strip {
  background: var(--color-info-bg);
  border-bottom: 1px solid var(--color-info-border);
  color: var(--color-info-text);
  font-size: var(--text-xs);
  line-height: 1.6;
  padding: var(--space-3) var(--space-4);
}
.info-strip__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.info-strip__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-warning);
  margin-top: 2px;
}
.info-strip__text { flex: 1; max-width: none; }
.info-strip__text strong { font-weight: 600; }
.info-strip__text a {
  color: var(--color-info-text);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: 500;
}
.info-strip__text a:hover { color: var(--color-warning); }

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
}
.header__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}
.brand:hover { text-decoration: none; color: var(--color-text); }
.brand__mark { width: 44px; height: 40px; color: var(--color-primary); flex-shrink: 0; }
.brand__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.brand__name[data-lang="si"] {
  font-family: "Noto Sans Sinhala", var(--font-body);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0;
}
.brand__name[data-lang="ta"] {
  font-family: "Noto Sans Tamil", var(--font-body);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0;
}
.brand__tag { display: none !important; }

.nav {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}
.nav__link {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
}
.nav__link:hover, .nav__link.is-active {
  color: var(--color-text);
  text-decoration: none;
}
.nav__link.is-active {
  color: var(--color-primary);
}

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

/* Language switcher */
.lang-switch {
  display: flex;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 2px;
  background: var(--color-surface);
}
.lang-switch button {
  padding: 6px 12px;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.lang-switch button[lang="si"] {
  font-family: "Noto Sans Sinhala", var(--font-body);
  letter-spacing: 0;
}
.lang-switch button[lang="ta"] {
  font-family: "Noto Sans Tamil", var(--font-body);
  letter-spacing: 0;
}
.lang-switch button.is-active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.lang-switch button:not(.is-active):hover {
  color: var(--color-text);
}

/* Theme toggle */
.theme-toggle {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-primary); }
.theme-toggle svg { width: 18px; height: 18px; }

/* Mobile menu */
.menu-toggle { display: none; }

/* ---------- Layout containers ---------- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
section + section { border-top: 1px solid var(--color-divider); }

/* ---------- Hero ---------- */
.hero {
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
  position: relative;
  overflow: hidden;
}
/* Constrain the hero content inside the container and center it so wide
   viewports feel balanced rather than left-anchored. Sized to accommodate
   Tamil's natural width (widest of the three scripts) with breathing room:
   Tamil hero title measures ~870px, so we allow up to 1000px. */
.hero > .container {
  max-width: 1000px;
}
/* Sri Lanka national flag inline with the eyebrow. Sized to render the lion
   emblem legibly (≈56px wide) without dominating the eyebrow. Displayed at
   full opacity because the flag code requires accurate, undamaged depiction. */
.lk-mark {
  display: inline-block;
  vertical-align: -8px;
  width: 56px;
  height: 28px;
  margin-inline-start: var(--space-3);
  border-radius: 1px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}
.hero__title {
  font-size: var(--text-hero);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-8);
  max-width: 20ch;
}
.hero__title em {
  font-style: italic;
  color: var(--color-primary);
}
.hero__lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 55ch;
  margin-bottom: var(--space-10);
  line-height: 1.5;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-4); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--secondary:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
  text-decoration: none;
  border-color: var(--color-text);
}
.btn--large { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }
.btn svg { width: 16px; height: 16px; }

/* ---------- Section headings ---------- */
.section-head {
  margin-bottom: var(--space-12);
  max-width: 60ch;
}
.section-head__eyebrow {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.section-head__title {
  font-size: var(--text-2xl);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-4);
}
.section-head__lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ---------- Framework steps grid ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
}
.step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: relative;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.step:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.step__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-4);
}
.step__title {
  font-size: var(--text-lg);
  font-weight: 400;
  margin-bottom: var(--space-3);
  font-family: var(--font-display);
}
.step__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.step a { color: var(--color-primary); font-weight: 500; }

/* ---------- Feature blocks (2-column) ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: start;
}
@media (min-width: 768px) {
  .feature-row { grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
  .feature-row--reverse .feature-row__visual { order: 2; }
}
.feature-row + .feature-row { margin-top: var(--space-24); }
.feature-row__body { max-width: 55ch; }
.feature-row__eyebrow {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.feature-row__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  font-family: var(--font-display);
}
.feature-row__lead {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.feature-row__body ul {
  padding-left: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-base);
}
.feature-row__body li { margin-bottom: var(--space-2); }
.feature-row__body li::marker { color: var(--color-primary); }

.feature-row__visual {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Download card ---------- */
.download-block {
  background: linear-gradient(135deg,
    color-mix(in oklab, var(--color-primary) 8%, var(--color-surface)),
    var(--color-surface));
  border: 1px solid var(--color-primary-highlight);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 5vw, var(--space-16));
  text-align: center;
}
.download-block__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}
.download-block__lead {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 60ch;
  margin: 0 auto var(--space-8);
}
.download-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-6);
}

/* ---------- Comparison table ---------- */
.rate-table {
  margin-top: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}
.rate-table table { font-size: var(--text-sm); }
.rate-table th, .rate-table td {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  border-bottom: 1px solid var(--color-divider);
}
.rate-table th {
  background: var(--color-surface-offset);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}
.rate-table td:nth-child(2), .rate-table th:nth-child(2) {
  text-align: right;
  font-variant-numeric: tabular-nums;
  width: 130px;
}
.rate-table tbody tr:last-child td { border-bottom: none; }
.rate-table tbody tr:hover { background: var(--color-surface-offset); }

/* ---------- Help / directory cards ---------- */
.directory {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}
.dir-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.dir-card__type {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  font-weight: 500;
}
.dir-card__title {
  font-size: var(--text-lg);
  font-family: var(--font-display);
  color: var(--color-text);
}
.dir-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex: 1;
}
.dir-card__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  margin-top: auto;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-24);
}
.footer__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}
@media (min-width: 768px) {
  .footer__inner { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
.footer__col h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.footer__col ul { list-style: none; }
.footer__col li { margin-bottom: var(--space-2); }
.footer__col a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.footer__col a:hover { color: var(--color-text); text-decoration: none; }
.footer__brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 40ch;
}
.footer__legal {
  max-width: var(--content-wide);
  margin: var(--space-12) auto 0;
  padding: var(--space-6) var(--space-4) 0;
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* ---------- Prose (content pages) ---------- */
.prose {
  font-size: var(--text-base);
  line-height: 1.7;
}
.prose h1 { font-size: var(--text-2xl); margin-bottom: var(--space-6); }
.prose h2 {
  font-size: var(--text-xl);
  margin-top: var(--space-16);
  margin-bottom: var(--space-5);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.prose h3 {
  font-size: var(--text-lg);
  margin-top: var(--space-10);
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
  font-weight: 600;
}
.prose p, .prose ul, .prose ol { margin-bottom: var(--space-5); }
.prose ul, .prose ol { padding-left: var(--space-6); }
.prose li { margin-bottom: var(--space-2); }
.prose li::marker { color: var(--color-primary); }
.prose blockquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-2) var(--space-6);
  margin: var(--space-8) 0;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  background: var(--color-surface);
}
.prose .callout {
  background: var(--color-info-bg);
  border: 1px solid var(--color-info-border);
  color: var(--color-info-text);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
}
.prose .callout strong { font-weight: 600; }
.prose table {
  margin: var(--space-8) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: var(--text-sm);
}
.prose th, .prose td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  text-align: left;
}
.prose th {
  background: var(--color-surface-offset);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}
.prose tbody tr:last-child td { border-bottom: none; }
.prose a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Utility ---------- */
.text-muted { color: var(--color-text-muted); }
.hidden { display: none !important; }

/* ---------- Language-panel visibility ---------- */
[data-lang="en"] { display: block; }
[data-lang="si"], [data-lang="ta"] { display: none; }
html[data-active-lang="si"] [data-lang="en"] { display: none; }
html[data-active-lang="si"] [data-lang="si"] { display: block; }
html[data-active-lang="ta"] [data-lang="en"] { display: none; }
html[data-active-lang="ta"] [data-lang="ta"] { display: block; }

/* Inline text variants — default all data-lang spans off, then
   show the active language. Use unset so parents that need block
   (e.g. big-label) can override via their own rule. */
span[data-lang="en"], span[data-lang="si"], span[data-lang="ta"] { display: none; }
html:not([data-active-lang]) span[data-lang="en"],
html[data-active-lang="en"] span[data-lang="en"] { display: inline; }
html[data-active-lang="si"] span[data-lang="si"] { display: inline; }
html[data-active-lang="ta"] span[data-lang="ta"] { display: inline; }

/* Block-style language spans — opt-in for labels/hints that should
   stand alone rather than flow inline. */
span.big-label[data-lang], span.hint[data-lang] { display: none; }
html:not([data-active-lang]) span.big-label[data-lang="en"],
html[data-active-lang="en"] span.big-label[data-lang="en"],
html[data-active-lang="si"] span.big-label[data-lang="si"],
html[data-active-lang="ta"] span.big-label[data-lang="ta"] { display: block; }

/* ---------- Vernacular typography ----------
   Tamil and Sinhala have no italic and no serif variants of the display
   font. Instrument Serif also lacks Tamil/Sinhala glyphs entirely, so it
   silently falls back to the browser default and mixes fonts mid-heading.
   Below we force the correct Noto Sans script for headings, remove italic
   (fake obliques look wrong on these scripts), and give combining marks
   the vertical breathing room they need. */

html[data-active-lang="si"] :is(.hero__title, .section__title, .card__title, h1, h2, h3),
html[data-active-lang="si"] :is(.brand__name, .stat__value) {
  font-family: "Noto Sans Sinhala", "Iowan Old Style", var(--font-body);
  letter-spacing: 0;
}
html[data-active-lang="ta"] :is(.hero__title, .section__title, .card__title, h1, h2, h3),
html[data-active-lang="ta"] :is(.brand__name, .stat__value) {
  font-family: "Noto Sans Tamil", "Iowan Old Style", var(--font-body);
  letter-spacing: 0;
}

/* No italic on Tamil/Sinhala — use weight + color for emphasis instead. */
html[data-active-lang="si"] em,
html[data-active-lang="ta"] em {
  font-style: normal;
  font-weight: 600;
}

/* Hero heading — Tamil/Sinhala need more line-height for combining marks
   below the baseline. Keep the display size close to English so the hero
   doesn't feel visually shrunken at wide viewports. */
html[data-active-lang="si"] .hero__title,
html[data-active-lang="ta"] .hero__title {
  line-height: 1.3;
  letter-spacing: 0;
  font-weight: 600;
  font-size: calc(var(--text-hero) * 0.9);
}
html[data-active-lang="si"] .hero__title { max-width: 22ch; }
/* Tamil characters are wider than Sinhala and take more horizontal room per
   syllable (base + combining vowel signs on both sides). Give it more room
   so the title doesn't cram against the container edge. */
html[data-active-lang="ta"] .hero__title { max-width: 26ch; }

/* Body copy in Tamil/Sinhala — same reason. Small bump to line-height. */
html[data-active-lang="si"] :is(.hero__lead, p, li),
html[data-active-lang="ta"] :is(.hero__lead, p, li) {
  line-height: 1.75;
}

/* Section titles used elsewhere on the page. */
html[data-active-lang="si"] :is(.section__title, .card__title, h2, h3),
html[data-active-lang="ta"] :is(.section__title, .card__title, h2, h3) {
  line-height: 1.3;
  font-weight: 600;
}

/* ---------- Mobile nav toggle ---------- */
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-direction: column;
  width: 40px;
  height: 40px;
}
.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 200ms ease, opacity 200ms ease;
}
.nav-toggle--open .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle--open .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle--open .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .brand__tag { display: none !important; }
}
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; order: 3; }
  .header-actions { order: 2; gap: var(--space-2); }
  .header__inner {
    padding: var(--space-3) var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
  }
  .brand { flex: 1 1 auto; min-width: 0; }
  .nav {
    order: 4;
    flex-basis: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: var(--space-2);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-3);
  }
  .nav.nav--open { display: flex; }
  .nav__link {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-base);
  }
  .nav__link:last-child { border-bottom: 0; }
  .hero { padding-block: var(--space-16); }
  .feature-row { gap: var(--space-8); }
  .feature-row + .feature-row { margin-top: var(--space-16); }
  .lang-switch { padding: 2px; }
  .lang-switch button { padding: 4px 8px; font-size: var(--text-xs); }
}