/* =====================================================================
   Plant Sciences Alumni Association (PSAA) — Shared Stylesheet
   Aesthetic: refined botanical / organic editorial
   ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..700;1,9..144,400..600&family=Hanken+Grotesk:wght@400;500;600;700&display=swap');

:root {
  /* Palette pulled from the proposal's olive / cream botanical theme */
  --green-900: #2f3a1c;
  --green-800: #3c4a24;
  --green-700: #4a5a2c;
  --green-600: #5c6b3a;
  --green-500: #6f7e46;
  --green-400: #8a9760;
  --green-300: #aab382;
  --moss:      #6b7440;
  --cream:     #f3f2e9;
  --cream-2:   #eceadd;
  --sand:      #e3e0cf;
  --ink:       #2a2d22;
  --ink-soft:  #545744;
  --gold:      #c8a14a;
  --white:     #ffffff;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Hanken Grotesk', system-ui, sans-serif;

  --maxw: 1180px;
  --radius: 18px;
  --radius-lg: 28px;
  --shadow-sm: 0 2px 10px rgba(47,58,28,.06);
  --shadow-md: 0 14px 40px rgba(47,58,28,.12);
  --shadow-lg: 0 30px 70px rgba(47,58,28,.20);
  --ease: cubic-bezier(.22,.61,.36,1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 .4em;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: .22em;
  font-size: .72rem;
  font-weight: 600;
  color: var(--moss);
  display: inline-flex;
  align-items: center;
  gap: .6rem;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--moss);
  display: inline-block;
}

/* ------------------------- Buttons ------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .98rem;
  padding: .85rem 1.7rem;
  border-radius: 100px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .35s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease), color .3s var(--ease);
  text-align: center;
}
.btn-primary { background: var(--green-700); color: var(--cream); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--green-800); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--green-800); border-color: var(--green-600); }
.btn-ghost:hover { background: var(--green-700); color: var(--cream); transform: translateY(-3px); }
.btn-gold { background: var(--gold); color: #3a2e0c; }
.btn-gold:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

/* ------------------------- Header / Nav ------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(243,242,233,.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(74,90,44,.12);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 14px 24px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: .75rem; }
.brand .mark { width: 44px; height: 44px; flex: none; }
.brand .brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand .brand-text strong { font-family: var(--font-display); font-size: 1.12rem; color: var(--green-800); font-weight: 600; }
.brand .brand-text span { font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }

.nav-links { display: flex; align-items: center; gap: .35rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  font-weight: 500;
  font-size: .96rem;
  padding: .5rem .85rem;
  border-radius: 100px;
  color: var(--ink);
  transition: background .25s var(--ease), color .25s var(--ease);
}
.nav-links a:hover { background: rgba(74,90,44,.1); color: var(--green-800); }
.nav-links a.active { color: var(--green-800); background: rgba(74,90,44,.14); }
.nav-cta { margin-left: .4rem; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px; height: 44px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0;
}
.nav-toggle span { display: block; height: 2px; width: 24px; margin: 0 auto; background: var(--green-800); transition: transform .3s var(--ease), opacity .3s var(--ease); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: .2rem;
    background: var(--cream);
    padding: 16px 24px 24px;
    border-bottom: 1px solid rgba(74,90,44,.12);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform .3s var(--ease), opacity .3s var(--ease);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: .8rem 1rem; }
  .nav-cta { margin-left: 0; margin-top: .4rem; }
}

/* ------------------------- Hero ------------------------- */
.hero {
  position: relative;
  background: linear-gradient(160deg, var(--green-800), var(--green-600) 70%, var(--green-700));
  color: var(--cream);
  overflow: hidden;
}
.hero .container { position: relative; z-index: 2; padding-top: 100px; padding-bottom: 110px; }
.hero-leaf {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: .16;
  pointer-events: none;
}
.hero-leaf svg { position: absolute; right: -60px; top: -40px; width: 620px; height: auto; color: var(--cream); }
.hero h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); max-width: 16ch; }
.hero .eyebrow { color: var(--green-300); }
.hero .eyebrow::before { background: var(--green-300); }
.hero p.lead { font-size: 1.18rem; max-width: 52ch; color: rgba(243,242,233,.9); margin: 1.2rem 0 2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; }

/* ------------------------- Section primitives ------------------------- */
.section { padding: 88px 0; position: relative; }
.section.tight { padding: 60px 0; }
.section-head { max-width: 620px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(2rem, 4vw, 2.9rem); color: var(--green-800); margin-top: .5rem; }
.section-head p { color: var(--ink-soft); font-size: 1.08rem; }
.bg-cream2 { background: var(--cream-2); }
.bg-sand { background: var(--sand); }
.bg-green { background: var(--green-800); color: var(--cream); }
.bg-green .section-head h2, .bg-green h2, .bg-green h3 { color: var(--cream); }
.bg-green .section-head p { color: rgba(243,242,233,.82); }

/* ------------------------- Cards / grids ------------------------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(74,90,44,.08);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card .ico {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--cream-2);
  color: var(--green-700);
  margin-bottom: 18px;
}
.card h3 { font-size: 1.3rem; color: var(--green-800); }
.card p { color: var(--ink-soft); margin: 0; }

/* ------------------------- Stats ------------------------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { text-align: center; padding: 18px; }
.stat .num { font-family: var(--font-display); font-size: clamp(2.2rem, 5vw, 3.2rem); color: var(--green-700); line-height: 1; }
.bg-green .stat .num { color: var(--green-300); }
.stat .label { font-size: .9rem; letter-spacing: .04em; color: var(--ink-soft); text-transform: uppercase; }
.bg-green .stat .label { color: rgba(243,242,233,.8); }

/* ------------------------- Footer ------------------------- */
.site-footer { background: var(--green-900); color: rgba(243,242,233,.85); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
.site-footer h4 { color: var(--cream); font-family: var(--font-body); font-weight: 700; font-size: .95rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 1rem; }
.site-footer a:hover { color: var(--green-300); }
.site-footer .brand .brand-text strong { color: var(--cream); }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; }
.footer-bottom { margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(243,242,233,.16); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: .85rem; color: rgba(243,242,233,.6); }

/* ------------------------- Reveal animation ------------------------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ------------------------- Page header (interior pages) ------------------------- */
.page-hero {
  background: linear-gradient(160deg, var(--green-800), var(--green-700));
  color: var(--cream);
  padding: 80px 0 70px;
  position: relative;
  overflow: hidden;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(2.3rem, 5vw, 3.6rem); }
.page-hero p { color: rgba(243,242,233,.9); max-width: 56ch; font-size: 1.1rem; }
.page-hero .leaf-bg { position: absolute; right: -40px; bottom: -80px; width: 460px; opacity: .14; color: var(--cream); z-index: 1; }

.breadcrumb { font-size: .82rem; letter-spacing: .04em; color: var(--green-300); margin-bottom: 1rem; }
.breadcrumb a:hover { color: var(--cream); }

/* ------------------------- Lists with leaf bullets ------------------------- */
.leaf-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .8rem; }
.leaf-list li { position: relative; padding-left: 1.9rem; color: var(--ink-soft); }
.leaf-list li::before {
  content: "";
  position: absolute; left: 0; top: .35em;
  width: 14px; height: 14px;
  background: var(--green-500);
  border-radius: 0 100% 0 100%;
  transform: rotate(45deg);
}

/* ------------------------- Prose ------------------------- */
.prose { max-width: 70ch; }
.prose p { color: var(--ink-soft); margin: 0 0 1.2rem; font-size: 1.06rem; }
.prose h3 { color: var(--green-800); margin-top: 2rem; font-size: 1.5rem; }

/* ------------------------- Event / ticket specifics ------------------------- */
.event-meta { display: flex; flex-wrap: wrap; gap: 14px; margin: 1.6rem 0 2rem; }
.meta-chip {
  display: inline-flex; align-items: center; gap: .55rem;
  background: rgba(243,242,233,.14);
  border: 1px solid rgba(243,242,233,.25);
  padding: .55rem 1rem; border-radius: 100px;
  font-size: .95rem; font-weight: 500;
}

.ticket-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid rgba(74,90,44,.1);
}
.ticket-top { background: var(--green-700); color: var(--cream); padding: 28px 32px; display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 12px; }
.ticket-top .price { font-family: var(--font-display); font-size: 2.6rem; line-height: 1; }
.ticket-top .price small { font-size: .9rem; font-family: var(--font-body); opacity: .8; }
.ticket-body { padding: 30px 32px; }

.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .35rem; color: var(--green-800); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: .8rem 1rem;
  border: 1.5px solid var(--sand);
  border-radius: 12px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--cream);
  color: var(--ink);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: 0 0 0 4px rgba(111,126,70,.15);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 520px) { .field-row { grid-template-columns: 1fr; } }

.bank-box {
  background: var(--cream-2);
  border: 1px dashed var(--green-500);
  border-radius: 16px;
  padding: 22px 24px;
}
.bank-box dl { display: grid; grid-template-columns: auto 1fr; gap: .5rem 1.4rem; margin: 0; }
.bank-box dt { font-weight: 600; color: var(--green-800); }
.bank-box dd { margin: 0; color: var(--ink); }
.note { font-size: .88rem; color: var(--ink-soft); }
.placeholder-tag { color: #9a5b2b; font-weight: 600; }

.total-bar {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--green-800); color: var(--cream);
  padding: 16px 22px; border-radius: 14px; margin: 18px 0;
}
.total-bar .amount { font-family: var(--font-display); font-size: 1.7rem; }

/* ------------------------- Sponsorship tiers ------------------------- */
.tier {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 34px 28px 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(74,90,44,.1);
  display: flex; flex-direction: column;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.tier:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.tier.featured { border: 2px solid var(--gold); }
.tier .badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--gold); color: #3a2e0c; font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; padding: .35rem 1rem; border-radius: 100px; white-space: nowrap; }
.tier .tier-name { font-family: var(--font-display); font-size: 1.55rem; color: var(--green-800); }
.tier .tier-price { font-family: var(--font-display); font-size: 2.1rem; color: var(--green-700); margin: .2rem 0 .1rem; }
.tier .tier-price small { font-size: .85rem; font-family: var(--font-body); color: var(--ink-soft); }
.tier .tier-sub { color: var(--ink-soft); font-size: .95rem; min-height: 3em; margin-bottom: 1rem; }
.tier ul { list-style: none; margin: 0 0 1.4rem; padding: 0; display: grid; gap: .7rem; flex: 1; }
.tier ul li { position: relative; padding-left: 1.6rem; font-size: .95rem; color: var(--ink); }
.tier ul li::before { content: "✓"; position: absolute; left: 0; color: var(--green-600); font-weight: 700; }
.tier .btn { width: 100%; justify-content: center; }

/* ------------------------- Contact ------------------------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; }
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card { background: var(--white); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); border: 1px solid rgba(74,90,44,.08); }
.contact-card h3 { color: var(--green-800); font-size: 1.2rem; }
.people-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
@media (max-width: 520px) { .people-grid { grid-template-columns: 1fr; } }
.person { background: var(--cream-2); border-radius: 14px; padding: 16px 18px; }
.person .role { font-size: .75rem; text-transform: uppercase; letter-spacing: .1em; color: var(--moss); font-weight: 600; }
.person .name { font-weight: 600; color: var(--green-800); }
.person .ph { font-size: .9rem; color: var(--ink-soft); }
.map-embed { border: 0; width: 100%; height: 320px; border-radius: var(--radius); box-shadow: var(--shadow-sm); }

/* ------------------------- CTA band ------------------------- */
.cta-band { background: linear-gradient(135deg, var(--green-800), var(--green-600)); color: var(--cream); border-radius: var(--radius-lg); padding: 54px 48px; text-align: center; position: relative; overflow: hidden; }
.cta-band h2 { color: var(--cream); font-size: clamp(1.8rem, 4vw, 2.6rem); }
.cta-band p { color: rgba(243,242,233,.9); max-width: 50ch; margin: 0 auto 1.8rem; }

/* ------------------------- Toast ------------------------- */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--green-800); color: var(--cream); padding: 14px 22px; border-radius: 100px; box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transition: opacity .3s var(--ease), transform .3s var(--ease); z-index: 200; font-weight: 500; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }