:root {
  --forest: #183f34;
  --forest-deep: #0e2d25;
  --leaf: #4d755a;
  --moss: #a8c49d;
  --cream: #f5f0df;
  --paper: #fffdf6;
  --sun: #f2c94c;
  --coral: #ef765f;
  --sky: #b9d9d1;
  --ink: #172620;
  --line: rgba(23,38,32,.22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 17px/1.6 "DM Sans", system-ui, sans-serif; }
body::selection { color: var(--forest); background: var(--sun); }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3, h4 { font-family: "Fraunces", Georgia, serif; }
a { color: inherit; }
button { font: inherit; }
.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 10px 16px; transform: translateY(-160%); border-radius: 999px; color: white; background: var(--forest-deep); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 4px; }

.site-header { display: flex; justify-content: space-between; align-items: center; min-height: 80px; padding: 14px max(24px, 6vw); border-bottom: 1px solid rgba(255,255,255,.2); color: white; background: var(--forest); }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 40px; aspect-ratio: 1; border: 2px solid white; border-radius: 50% 50% 50% 8px; color: var(--forest); background: var(--sun); font: 700 1.2rem "Fraunces", Georgia, serif; }
.brand small { display: block; margin-top: -4px; color: rgba(255,255,255,.65); font-size: .63rem; font-weight: 500; letter-spacing: .08em; }
.site-header nav { display: flex; gap: 28px; }
.site-header nav a { font-size: .8rem; font-weight: 700; text-decoration: none; }
.site-header nav a:hover { color: var(--sun); }
.eyebrow { margin-bottom: 14px; color: var(--leaf); font-size: .72rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }

.deck-hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(40px, 8vw, 130px); align-items: end; min-height: 570px; padding: clamp(80px, 11vw, 150px) max(24px, 7vw); color: white; background: radial-gradient(circle at 83% 22%, var(--sun) 0 100px, transparent 101px), var(--forest); }
.deck-hero .eyebrow { color: var(--moss); }
.deck-hero h1 { margin: 0; font-size: clamp(4.5rem, 9vw, 9rem); line-height: .82; letter-spacing: -.06em; }
.deck-hero h1 em { color: var(--sun); }
.hero-copy { max-width: 560px; padding-bottom: 12px; }
.hero-copy p { color: rgba(255,255,255,.77); font-size: 1.15rem; }
.primary-button, .print-deck { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 50px; padding: 11px 20px; border: 0; border-radius: 999px; color: var(--forest); background: var(--sun); font-size: .84rem; font-weight: 700; text-decoration: none; cursor: pointer; }
.primary-button:hover, .print-deck:hover { background: white; }

.cost-key, .deck-picker, .print-help, .sources { padding: clamp(70px, 9vw, 120px) max(24px, 7vw); }
.cost-key { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(40px, 8vw, 120px); background: var(--cream); }
.key-intro h2, .picker-heading h2, .print-help h2, .sources h2 { margin: 0; font-size: clamp(2.7rem, 5vw, 4.8rem); line-height: .98; letter-spacing: -.04em; }
.key-intro > p:not(.eyebrow) { margin-top: 28px; color: #4a5d56; }
.key-intro .score-reminder { margin-top: 18px; padding: 14px 16px; border-left: 5px solid var(--coral); color: var(--forest); background: var(--paper); font-size: .78rem; }
.key-scale { display: grid; grid-template-columns: repeat(5, 1fr); overflow: hidden; align-self: start; border: 2px solid var(--forest); border-radius: 20px; background: var(--paper); box-shadow: 8px 8px 0 rgba(24,63,52,.12); }
.key-scale > div { display: flex; flex-direction: column; min-height: 190px; padding: 18px; border-right: 1px solid var(--line); }
.key-scale > div:last-child { border: 0; }
.key-scale span { min-height: 40px; font-size: .68rem; font-weight: 700; text-transform: uppercase; }
.key-scale strong { margin-top: auto; font: 700 3.2rem/1 "Fraunces", Georgia, serif; }
.key-scale small { color: var(--leaf); font-size: .65rem; text-transform: uppercase; }
.key-5 { border-top: 10px solid var(--forest); }
.key-4 { border-top: 10px solid var(--leaf); }
.key-3 { border-top: 10px solid #86a86d; }
.key-2 { border-top: 10px solid var(--sun); }
.key-1 { border-top: 10px solid var(--coral); }
.teacher-note { grid-column: 2; display: grid; grid-template-columns: 48px 1fr; gap: 16px; padding-top: 24px; border-top: 1px solid var(--line); }
.teacher-note > span { display: grid; place-items: center; width: 44px; aspect-ratio: 1; border-radius: 50%; color: white; background: var(--forest); font-weight: 700; }
.teacher-note p { margin: 0; color: #4a5d56; font-size: .82rem; }
.teacher-note strong { display: block; color: var(--coral); font-size: .68rem; text-transform: uppercase; }

.deck-picker { background: var(--paper); }
.picker-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; max-width: 1300px; margin: 0 auto 60px; }
.deck-tabs { display: inline-flex; padding: 5px; border: 1px solid var(--line); border-radius: 999px; background: var(--cream); }
.deck-tabs button { min-height: 48px; padding: 8px 18px; border: 0; border-radius: 999px; color: var(--forest); background: transparent; cursor: pointer; font-size: .78rem; font-weight: 700; }
.deck-tabs button[aria-selected="true"] { color: white; background: var(--forest); }
.deck-tabs span { margin-right: 7px; }
.deck-panel { max-width: 1300px; margin: 0 auto; }
.deck-titlebar { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 28px; padding: 30px; border-radius: 20px; color: white; background: var(--forest); }
.deck-titlebar span { color: var(--sun); font-size: .67rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.deck-titlebar h3 { margin: 3px 0 2px; font-size: 2.2rem; line-height: 1.1; }
.deck-titlebar p { max-width: 700px; margin: 0; color: rgba(255,255,255,.68); font-size: .78rem; }
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.bird-card { position: relative; display: flex; flex-direction: column; min-height: 405px; overflow: hidden; border: 2px solid var(--forest); border-radius: 18px; background: var(--paper); box-shadow: 5px 5px 0 rgba(24,63,52,.12); }
.bird-card::before { content: ""; height: 10px; background: var(--tier-color); }
.cost-5 { --tier-color: var(--forest); }
.cost-4 { --tier-color: var(--leaf); }
.cost-3 { --tier-color: #86a86d; }
.cost-2 { --tier-color: var(--sun); }
.cost-1 { --tier-color: var(--coral); }
.card-topline { display: flex; justify-content: space-between; padding: 10px 15px; border-bottom: 1px solid var(--line); color: var(--leaf); font-size: .62rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.card-title { display: grid; grid-template-columns: 52px 1fr; gap: 12px; align-items: center; padding: 17px 15px 12px; }
.cost-number { display: grid; place-items: center; width: 48px; aspect-ratio: 1; border-radius: 50%; color: white; background: var(--tier-color); font: 700 1.7rem/1 "Fraunces", Georgia, serif; }
.card-title h4 { margin: 0; font-size: 1.25rem; line-height: 1.1; }
.card-title i { color: var(--leaf); font-family: Georgia, serif; font-size: .69rem; }
.birdseed { display: flex; justify-content: space-between; align-items: center; min-height: 40px; padding: 7px 15px; color: var(--forest); background: var(--cream); }
.birdseed > span { font-size: .73rem; letter-spacing: -.18em; }
.birdseed strong { font-size: .62rem; text-transform: uppercase; }
.bird-card dl { display: grid; gap: 14px; margin: 0; padding: 17px 15px; }
.bird-card dl div + div { padding-top: 13px; border-top: 1px solid var(--line); }
.bird-card dt { margin-bottom: 3px; color: var(--coral); font-size: .59rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.bird-card dd { margin: 0; color: #3f534c; font-size: .76rem; line-height: 1.45; }
.card-footer { margin: auto 15px 0; padding: 10px 0 12px; border-top: 1px solid var(--line); color: var(--leaf); font-size: .57rem; font-weight: 700; text-transform: uppercase; }

.print-help { display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(40px, 8vw, 120px); color: white; background: var(--leaf); }
.print-help .eyebrow { color: var(--sun); }
.print-help ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 0; padding: 0; list-style: none; }
.print-help li { padding: 22px; border: 1px solid rgba(255,255,255,.38); border-radius: 16px; background: rgba(255,255,255,.08); }
.print-help li > span { display: grid; place-items: center; width: 36px; aspect-ratio: 1; border-radius: 50%; color: var(--forest); background: var(--sun); font-weight: 700; }
.print-help li p { margin: 25px 0 0; color: rgba(255,255,255,.74); font-size: .8rem; }
.print-help strong { display: block; color: white; font-family: "Fraunces", Georgia, serif; font-size: 1rem; }

.sources { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(40px, 8vw, 120px); background: var(--cream); }
.sources > div:last-child > p { color: #4a5d56; }
.sources ul { margin: 30px 0 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.sources li { border-bottom: 1px solid var(--line); }
.sources a { display: block; padding: 15px 0; color: var(--forest); font-size: .83rem; font-weight: 700; text-underline-offset: 4px; }

footer { display: flex; justify-content: space-between; gap: 30px; padding: 28px max(24px, 7vw); color: rgba(255,255,255,.65); background: var(--forest-deep); font-size: .76rem; }
footer p { margin: 0; }
footer div { display: flex; gap: 26px; }
footer a { color: white; text-underline-offset: 4px; }

@media (max-width: 1000px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .key-scale { grid-template-columns: repeat(5, minmax(100px, 1fr)); overflow-x: auto; }
  .print-help { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .site-header nav { display: none; }
  .deck-hero, .cost-key, .sources { grid-template-columns: 1fr; }
  .deck-hero { min-height: 650px; align-content: center; }
  .deck-hero h1 { font-size: clamp(4rem, 18vw, 7rem); }
  .teacher-note { grid-column: auto; }
  .picker-heading, .deck-titlebar { align-items: stretch; flex-direction: column; }
  .deck-tabs { width: 100%; border-radius: 18px; }
  .deck-tabs button { flex: 1; border-radius: 14px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .print-help ol { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .brand { font-size: .88rem; }
  .deck-tabs { flex-direction: column; }
  .card-grid { grid-template-columns: 1fr; }
  .bird-card { min-height: 0; }
  .deck-titlebar { padding: 22px; }
  footer, footer div { flex-direction: column; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

@media print {
  @page { size: letter portrait; margin: .35in; }
  body { color: #000; background: #fff; font-size: 9pt; }
  .site-header, .deck-hero, .cost-key, .picker-heading, .deck-titlebar, .print-help, .sources, footer { display: none !important; }
  .deck-picker { padding: 0; }
  .deck-panel[hidden] { display: none !important; }
  .card-grid { display: grid; grid-template-columns: repeat(2, 3.75in); gap: .12in; justify-content: center; }
  .bird-card { min-height: 2.46in; height: 2.46in; break-inside: avoid; border: 1.5px solid #000; border-radius: 9px; box-shadow: none; }
  .bird-card::before { height: 6px; background: #777; }
  .card-topline { padding: 4px 9px; font-size: 5.5pt; }
  .card-title { grid-template-columns: 36px 1fr; gap: 7px; padding: 7px 9px 5px; }
  .cost-number { width: 32px; color: #fff; background: #000; font-size: 15pt; }
  .card-title h4 { font-size: 12pt; }
  .card-title i { font-size: 6.5pt; }
  .birdseed { min-height: 24px; padding: 3px 9px; }
  .birdseed > span { font-size: 6.5pt; }
  .birdseed strong { font-size: 5.5pt; }
  .bird-card dl { grid-template-columns: 1.2fr .8fr; gap: 8px; padding: 7px 9px; }
  .bird-card dl div + div { padding-top: 0; padding-left: 8px; border-top: 0; border-left: 1px solid #aaa; }
  .bird-card dt { font-size: 5pt; }
  .bird-card dd { color: #000; font-size: 6.4pt; line-height: 1.25; }
  .card-footer { margin: auto 9px 0; padding: 3px 0 5px; font-size: 4.8pt; }
}