/* =========================================================================
   Library and Information Centre, Kakching — Global Stylesheet
   -------------------------------------------------------------------------
   Structure of this file:
     1.  CSS Variables (theme palette, spacing, typography) — edit here
     2.  Base / reset
     3.  Layout helpers (container, section, grid)
     4.  Navbar + mobile hamburger
     5.  Buttons
     6.  Hero
     7.  Cards / grids (donors, programmes)
     8.  Timeline component
     9.  Accordion (finance)
     10. Tables / stats
     11. Forms (contact)
     12. Footer
     13. Scroll-reveal animation states
     14. Responsive breakpoints
   Change the values in section 1 to re-theme the whole site.
   ========================================================================= */

/* =========================================================================
   1. CSS VARIABLES — single source of truth for the theme
   ========================================================================= */
:root {
  /* --- Earthy community-library palette --- */
  --color-primary: #7a2e26;         /* deep terracotta / maroon */
  --color-primary-dark: #5a1f19;    /* darker maroon for hovers */
  --color-primary-light: #a24a3f;   /* lighter accent */
  --color-secondary: #2f5d43;       /* forest green accent */
  --color-secondary-dark: #21432f;
  --color-accent: #c9822f;          /* warm ochre / gold highlight */

  --color-cream: #faf6ef;           /* main page background */
  --color-cream-dark: #f0e9dd;      /* alternating section background */
  --color-surface: #ffffff;         /* card surface */
  --color-ink: #2b2420;             /* primary text (warm near-black) */
  --color-ink-soft: #5c534b;        /* secondary text */
  --color-border: #e2d8c8;          /* subtle borders */

  /* --- Typography --- */
  --font-heading: Georgia, "Times New Roman", "Noto Serif", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* --- Spacing scale --- */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3.5rem;
  --space-xl: 6rem;

  /* --- Misc --- */
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 6px 20px rgba(43, 36, 32, 0.08);
  --shadow-lg: 0 14px 40px rgba(43, 36, 32, 0.14);
  --max-width: 1180px;
  --transition: 0.25s ease;
}

/* =========================================================================
   2. BASE / RESET
   ========================================================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background-color: var(--color-cream);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  color: var(--color-primary-dark);
  margin: 0 0 var(--space-sm);
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-dark); }

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

ul { margin: 0 0 var(--space-sm); padding-left: 1.2rem; }

/* Accessible focus outline for keyboard users */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip link — jumps keyboard users straight to main content */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-xs) var(--space-sm);
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
  color: #fff;
}

/* =========================================================================
   3. LAYOUT HELPERS
   ========================================================================= */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
}

.section {
  padding-block: var(--space-lg);
}
.section--alt {
  background-color: var(--color-cream-dark);
}

.section-head {
  max-width: 720px;
  margin-bottom: var(--space-md);
}
.section-head.center {
  margin-inline: auto;
  text-align: center;
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}
.lead { font-size: 1.15rem; color: var(--color-ink-soft); }

/* Generic responsive auto-fit grid */
.grid {
  display: grid;
  gap: var(--space-md);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* =========================================================================
   4. NAVBAR + MOBILE HAMBURGER
   ========================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-cream);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 10px rgba(43, 36, 32, 0.04);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block: 0.75rem;
}

/* Brand / logo lockup */
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-primary-dark);
}
.brand:hover { color: var(--color-primary-dark); }
.brand__mark {
  flex: 0 0 auto;
  width: 90px;
  height: 90px;
  object-fit: contain;
  color: var(--color-primary);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
}
.brand__sub {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

/* Nav links */
.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__links a {
  display: block;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-weight: 600;
  font-size: 0.95rem;
}
.nav__links a:hover { background: var(--color-cream-dark); color: var(--color-primary-dark); }
/* Active page indicator (set aria-current="page" in HTML) */
.nav__links a[aria-current="page"] {
  color: var(--color-primary-dark);
  background: var(--color-cream-dark);
}

/* Hamburger toggle button — hidden on desktop */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin-inline: auto;
  background: var(--color-primary-dark);
  transition: transform var(--transition), opacity var(--transition);
}
/* Animate hamburger into an X when open */
.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); }

/* =========================================================================
   5. BUTTONS
   ========================================================================= */
.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.15); color: #fff; }
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover { background: var(--color-primary); color: #fff; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* =========================================================================
   6. HERO
   ========================================================================= */
.hero {
  position: relative;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(90, 31, 25, 0.92), rgba(47, 93, 67, 0.88));
  overflow: hidden;
}
/* Decorative book-spine texture using repeating gradient (no images needed) */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.04) 0 2px,
    transparent 2px 22px
  );
  opacity: 0.5;
  pointer-events: none;
}
.hero__inner {
  position: relative;
  max-width: 780px;
  padding-block: var(--space-xl);
}
.hero h1 { color: #fff; }
.hero__motto {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.hero__intro {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: var(--space-md);
}

/* Compact hero used on interior pages */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
  color: #fff;
  padding-block: var(--space-lg);
}
.page-hero h1 { color: #fff; margin-bottom: var(--space-xs); }
.page-hero p { color: rgba(255, 255, 255, 0.9); max-width: 640px; margin: 0; }
.page-hero .eyebrow { color: var(--color-accent); }

/* =========================================================================
   7. CARDS / GRIDS
   ========================================================================= */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}
.card h3 { margin-bottom: 0.4rem; }
.card p { color: var(--color-ink-soft); margin-bottom: 0; }

/* Small tag/pill (e.g. schedule labels) */
.pill {
  display: inline-block;
  background: var(--color-cream-dark);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  padding: 0.25rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0.2rem 0.2rem 0 0;
}

/* Feature row (icon + text) used on home + about */
.feature {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
}
.feature__icon {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  color: var(--color-secondary);
}

/* =========================================================================
   8. TIMELINE COMPONENT (alternating on desktop, single column on mobile)
   ========================================================================= */
.timeline {
  position: relative;
  max-width: 960px;
  margin-inline: auto;
  padding: var(--space-md) 0;
}
/* The central vertical spine */
.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  background: linear-gradient(var(--color-primary), var(--color-secondary));
  transform: translateX(-50%);
}
.timeline__item {
  position: relative;
  width: 50%;
  padding: 0 var(--space-md) var(--space-md);
}
/* Odd items on the left, even items on the right */
.timeline__item:nth-child(odd) { left: 0; text-align: right; }
.timeline__item:nth-child(even) { left: 50%; text-align: left; }

/* The dot on the spine */
.timeline__item::after {
  content: "";
  position: absolute;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  border: 3px solid var(--color-cream);
  border-radius: 50%;
  z-index: 1;
}
.timeline__item:nth-child(odd)::after { right: -8px; }
.timeline__item:nth-child(even)::after { left: -8px; }

.timeline__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-sm) var(--space-md);
  box-shadow: var(--shadow);
}
.timeline__year {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 0.2rem;
}
.timeline__card p { margin: 0; color: var(--color-ink-soft); }

/* =========================================================================
   9. ACCORDION (finance page)
   ========================================================================= */
.accordion { max-width: 900px; margin-inline: auto; }
.accordion__item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: var(--space-sm);
  overflow: hidden;
}
.accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}
.accordion__trigger:hover { background: var(--color-cream-dark); }
.accordion__icon {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  transition: transform var(--transition);
}
.accordion__trigger[aria-expanded="true"] .accordion__icon { transform: rotate(45deg); }
/* Panel is collapsed via max-height; JS toggles the .is-open class */
.accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.accordion__panel-inner {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-ink-soft);
}

/* =========================================================================
   10. TABLES / STATS
   ========================================================================= */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
}
.stat {
  text-align: center;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat__num {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}
.stat__label {
  display: block;
  margin-top: 0.4rem;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}

/* Simple horizontal-bar "chart" for the finance overview (pure CSS) */
.bars { max-width: 760px; margin-inline: auto; }
.bar { margin-bottom: var(--space-md); }
.bar__head {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.bar__track {
  height: 22px;
  background: var(--color-cream-dark);
  border-radius: 50px;
  overflow: hidden;
}
.bar__fill {
  height: 100%;
  width: 0;                      /* animated to target width by JS */
  border-radius: 50px;
  transition: width 1.1s ease;
}
.bar__fill--a { background: var(--color-primary); }
.bar__fill--b { background: var(--color-secondary); }
.bar__fill--c { background: var(--color-accent); }

/* Data table */
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
table.data th,
table.data td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
table.data th {
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-heading);
}
table.data tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover { background: var(--color-cream-dark); }

/* =========================================================================
   11. FORMS (contact)
   ========================================================================= */
.form { max-width: 620px; }
.form__group { margin-bottom: var(--space-sm); }
.form__group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.form__group input,
.form__group textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  font: inherit;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(122, 46, 38, 0.15);
}
/* Inline validation error text */
.form__error {
  display: block;
  color: var(--color-primary);
  font-size: 0.85rem;
  margin-top: 0.3rem;
  min-height: 1.1em;
}
.form__group.invalid input,
.form__group.invalid textarea { border-color: var(--color-primary); }

/* Honeypot spam-trap field — visually hidden but still in the DOM so bots
   fill it in and humans never see it. Kept out of the tab order + a11y tree. */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

/* Success / info notice */
.notice {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--color-secondary);
  background: #eef4ef;
  color: var(--color-secondary-dark);
  margin-bottom: var(--space-md);
}
.notice--muted {
  border-left-color: var(--color-accent);
  background: #fbf3e6;
  color: #7a5316;
}
.form__status {
  margin-top: var(--space-sm);
  font-weight: 600;
  min-height: 1.4em;
}
.form__status.ok { color: var(--color-secondary-dark); }

/* Two-column contact layout */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin-bottom: var(--space-sm);
}
.info-list svg { flex: 0 0 auto; width: 24px; height: 24px; color: var(--color-primary); }

/* =========================================================================
   12. FOOTER
   ========================================================================= */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  padding-block: var(--space-lg) var(--space-md);
  margin-top: var(--space-xl);
}
.site-footer h4 { color: #fff; margin-bottom: var(--space-sm); }
.footer__logo {
  width: 120px;
  height: auto;
  display: block;
  margin-bottom: var(--space-sm);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-lg);
}
.site-footer a { color: rgba(255, 255, 255, 0.85); }
.site-footer a:hover { color: #fff; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 0.5rem; }
.footer__motto {
  font-family: var(--font-heading);
  font-style: italic;
  color: var(--color-accent);
  font-size: 1.15rem;
}
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  font-size: 0.85rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* =========================================================================
   13. SCROLL-REVEAL ANIMATION STATES (driven by IntersectionObserver)
   ========================================================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
/* Respect users who prefer reduced motion — show everything immediately */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .bar__fill { transition: none; }
}

/* =========================================================================
   14. RESPONSIVE BREAKPOINTS
   ========================================================================= */

/* --- Tablet & below: collapse nav into hamburger menu --- */
@media (max-width: 860px) {
  .nav__toggle { display: flex; }

  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-cream);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
    padding: var(--space-xs);
    /* Hidden by default; JS toggles .is-open */
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: 0.8rem 1rem; }

  .contact-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-md); }
}

/* --- Timeline collapses to a single left-aligned column on mobile --- */
@media (max-width: 720px) {
  .timeline::before { left: 8px; }
  .timeline__item,
  .timeline__item:nth-child(even) {
    width: 100%;
    left: 0;
    text-align: left;
    padding-left: 2.2rem;
    padding-right: 0;
  }
  .timeline__item:nth-child(odd) { text-align: left; }
  .timeline__item:nth-child(odd)::after,
  .timeline__item:nth-child(even)::after { left: 1px; right: auto; }
}