:root{color-scheme:light;--ink:#233027;--muted:#5a6a60;--paper:#fffaf1;--panel:#ffffff;--field:#f7f1e4;--line:#ddd1bb;--moss:#3f6b4f;--moss-dark:#254532;--sky:#d6e8eb;--danger:#a33d2f;--danger-bg:#a33d2f;--danger-text:#a33d2f;--body-background:radial-gradient(circle at top left,rgba(214,232,235,0.9),transparent 35rem),linear-gradient(135deg,#fffaf1,#efe5cf 55%,#d9e3d1);--nav-background:#fffaf1;--nav-border:rgba(63,107,79,0.22);--nav-shadow:0 16px 36px rgba(35,48,39,0.12);--surface-background:#ffffff;--surface-border:rgba(63,107,79,0.2);--surface-shadow:0 20px 50px rgba(35,48,39,0.1);--elevated-shadow:0 14px 30px rgba(35,48,39,0.18);--sticky-shadow:0 18px 28px rgba(35,48,39,0.1);--sticky-shadow-stuck:0 22px 36px rgba(35,48,39,0.16);--section-toggle-background:linear-gradient(135deg,rgba(214,232,235,0.72),rgba(247,241,228,0.95));--sticky-gap:16px;--nav-sticky-height:84px}:root[data-theme=system]{color-scheme:light dark}:root[data-theme=dark]{color-scheme:dark;--ink:#e8efe6;--muted:#9fb3a6;--paper:#1a241d;--panel:#202b23;--field:#2a382f;--line:#3d4f42;--moss:#4a7d5c;--moss-dark:#2f5a40;--sky:#2a3b3d;--danger:#b94a3a;--danger-bg:#b94a3a;--danger-text:#ff9a8a;--body-background:radial-gradient(circle at top left,rgba(42,59,61,0.9),transparent 35rem),linear-gradient(135deg,#1a241d,#202b23 55%,#1f2a22);--nav-background:#202b23;--nav-border:rgba(111,160,126,0.28);--nav-shadow:0 16px 36px rgba(0,0,0,0.4);--surface-background:#202b23;--surface-border:rgba(111,160,126,0.28);--surface-shadow:0 20px 50px rgba(0,0,0,0.4);--elevated-shadow:0 14px 30px rgba(0,0,0,0.4);--sticky-shadow:0 18px 28px rgba(0,0,0,0.4);--sticky-shadow-stuck:0 22px 36px rgba(0,0,0,0.45);--section-toggle-background:linear-gradient(135deg,rgba(42,59,61,0.72),rgba(42,56,47,0.95))}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--ink:#e8efe6;--muted:#9fb3a6;--paper:#1a241d;--panel:#202b23;--field:#2a382f;--line:#3d4f42;--moss:#4a7d5c;--moss-dark:#2f5a40;--sky:#2a3b3d;--danger:#b94a3a;--danger-bg:#b94a3a;--danger-text:#ff9a8a;--body-background:radial-gradient(circle at top left,rgba(42,59,61,0.9),transparent 35rem),linear-gradient(135deg,#1a241d,#202b23 55%,#1f2a22);--nav-background:#202b23;--nav-border:rgba(111,160,126,0.28);--nav-shadow:0 16px 36px rgba(0,0,0,0.4);--surface-background:#202b23;--surface-border:rgba(111,160,126,0.28);--surface-shadow:0 20px 50px rgba(0,0,0,0.4);--elevated-shadow:0 14px 30px rgba(0,0,0,0.4);--sticky-shadow:0 18px 28px rgba(0,0,0,0.4),0 10px 0 var(--paper);--sticky-shadow-stuck:0 22px 36px rgba(0,0,0,0.45),0 10px 0 var(--paper);--section-toggle-background:linear-gradient(135deg,rgba(42,59,61,0.72),rgba(42,56,47,0.95))}}*{box-sizing:border-box}html{scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}body{margin:0;min-height:100vh;background:var(--body-background);color:var(--ink);font-family:Georgia,Times New Roman,serif}a{color:inherit}.skip-link{position:absolute;top:8px;left:-9999px;z-index:100;background:var(--panel);color:var(--ink);padding:10px 16px;border:1px solid var(--line);border-radius:10px;font-weight:700;text-decoration:none;box-shadow:var(--elevated-shadow)}.skip-link:focus,.skip-link:focus-visible{left:16px}#main{scroll-margin-top:calc(var(--nav-sticky-height) + var(--sticky-gap) + 16px)}.shell{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:32px 0}.nav{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:36px;position:sticky;top:var(--sticky-gap);z-index:40;padding:16px 20px;background:var(--nav-background);border:1px solid var(--nav-border);border-radius:22px;box-shadow:var(--nav-shadow);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand{font-size:1.35rem;font-weight:700;letter-spacing:-.03em;text-decoration:none}.nav-links{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.nav .button,.nav button{font-size:.9rem;min-height:36px;padding:8px 14px}.card,.hero,.panel{background:var(--surface-background);border:1px solid var(--surface-border);border-radius:24px;box-shadow:var(--surface-shadow)}.hero{padding:clamp(32px,7vw,78px)}.hero h1{font-size:clamp(2.2rem,6vw,5rem)}.hero h1,.page-title{margin:0 0 12px;line-height:.95;letter-spacing:-.06em}.page-title{font-size:clamp(1.75rem,5vw,3rem)}.subtitle{margin:0;max-width:720px;color:var(--muted);font-size:1.15rem;line-height:1.55}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.card,.panel{padding:22px}.stack{display:grid;gap:16px}.row{display:flex;align-items:center;justify-content:space-between;gap:16px}.button,button{border:0;border-radius:999px;background:var(--moss);color:white;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-family:inherit;font-weight:700;min-height:42px;padding:10px 18px;text-decoration:none}.button.secondary,button.secondary{background:var(--field);color:var(--ink)}.button.danger,button.danger{background:var(--danger-bg)}button:disabled{cursor:not-allowed;opacity:.55}:focus-visible{outline:2px solid var(--moss-dark);outline-offset:3px;box-shadow:0 0 0 4px color-mix(in srgb,var(--moss) 35%,transparent)}.button:focus-visible,.jump-bar-letter:focus-visible,.toast-close:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--moss-dark);outline-offset:3px;border-radius:8px;box-shadow:0 0 0 4px color-mix(in srgb,var(--moss) 35%,transparent)}.bird-section-toggle:focus-visible,.checklist-controls .button:focus-visible,.nav .button:focus-visible{outline-offset:4px}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:var(--field);color:var(--ink);font:inherit;padding:12px 14px}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.theme-select{display:flex;align-items:center;gap:8px;min-height:36px;padding:8px 12px;background:var(--field);border:1px solid var(--line);border-radius:999px;color:var(--muted);cursor:pointer;font:inherit;font-weight:700}.theme-select:hover{color:var(--ink)}.theme-select svg{width:18px;height:18px;display:block}.theme-select span{white-space:nowrap}label{gap:7px;font-weight:700}.form,label{display:grid}.form{gap:14px}.small{color:var(--muted);font-size:.95rem}.table{width:100%;border-collapse:collapse}.table td,.table th{border-bottom:1px solid var(--line);padding:12px 8px;text-align:left;vertical-align:top}.bird-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px}.bird-section{gap:18px;padding:18px}.bird-section-toggle{width:100%;border-radius:18px;background:var(--section-toggle-background);color:var(--ink);justify-content:space-between;padding:16px 18px;text-align:left}.bird-section-toggle span:first-child{display:grid;gap:4px}.bird-section-meta{display:block}.bird-section-chevron{font-size:1.5rem;line-height:1}.sticky-list-header{position:sticky;top:0;z-index:30;background:var(--panel);-webkit-backdrop-filter:none;backdrop-filter:none;box-shadow:var(--sticky-shadow);isolation:isolate;display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"meta controls" "jump jump";gap:16px 20px;align-items:start}.sticky-list-header .page-title{font-size:clamp(1.25rem,3.5vw,1.875rem)}.checklist-header-copy{display:contents}.checklist-header-meta{grid-area:meta;min-width:0}.bird-row{align-items:start;background:var(--panel);border:1px solid var(--line);border-radius:18px;display:grid;gap:10px;padding:16px;scroll-margin-top:calc(var(--nav-sticky-height) + 160px)}.bird-row:has(.bird-check input:checked){background:color-mix(in srgb,var(--moss) 12%,var(--panel));border-color:color-mix(in srgb,var(--moss) 45%,var(--line));box-shadow:inset 4px 0 0 var(--moss)}.bird-check{align-items:center;display:flex;gap:10px;font-weight:700}.bird-check input{accent-color:var(--moss);height:22px;width:22px}.back-to-top{position:fixed;right:16px;bottom:16px;z-index:20;box-shadow:var(--elevated-shadow)}.error{color:var(--danger-text);font-weight:700}@media (max-width:640px){:root{--nav-sticky-height:176px}.nav,.row{align-items:stretch;flex-direction:column}.sticky-list-header{grid-template-columns:minmax(0,1fr);grid-template-areas:"meta" "controls" "jump"}.checklist-controls{min-width:0}.table{font-size:.9rem}.bird-section-toggle{align-items:flex-start}.jump-bar{gap:2px;padding:8px 10px}.jump-bar-letter{height:24px;font-size:.7rem;border-radius:7px}}.checklist-progress{margin:6px 0 0}.checklist-progress-bar{margin-top:10px;width:100%;height:8px;border-radius:999px;background:var(--field);overflow:hidden;border:1px solid var(--line);appearance:none;accent-color:var(--moss)}.checklist-progress-bar::-webkit-progress-bar{background:transparent;border-radius:999px}.checklist-progress-bar::-webkit-progress-value{background:linear-gradient(90deg,var(--moss),var(--moss-dark));border-radius:999px;-webkit-transition:width .2s ease;transition:width .2s ease}.checklist-progress-bar::-moz-progress-bar{background:linear-gradient(90deg,var(--moss),var(--moss-dark));border-radius:999px}.checklist-controls{display:flex;flex-wrap:wrap;align-items:flex-end;gap:10px;min-width:min(320px,100%);grid-area:controls}.checklist-controls label{display:grid;gap:4px;font-weight:600;min-width:0}.checklist-search{flex:1 1 200px}.checklist-sort{flex:0 0 160px}.button.is-active,button.is-active{background:var(--moss-dark);color:white}.button.small-button,button.small-button{min-height:32px;padding:6px 12px;font-size:.9rem}.export-menu{position:relative;display:inline-flex;align-self:flex-end}.export-menu>summary{list-style:none}.export-menu>summary::-webkit-details-marker{display:none}.export-menu-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:25;display:none;gap:6px;min-width:220px;padding:8px;background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--elevated-shadow)}.export-menu[open] .export-menu-panel{display:grid}.export-menu-item{display:grid;justify-items:center;gap:2px;width:100%;padding:10px 12px;text-align:center;border:1px solid transparent;border-radius:12px;background:var(--field);color:var(--ink);cursor:pointer}.export-menu-item:hover:not(:disabled){background:var(--panel);border-color:var(--line)}.export-menu-item.is-disabled,.export-menu-item:disabled{opacity:.55;cursor:not-allowed}.export-menu-label{font-weight:700}@media (max-width:720px){.export-menu-panel{left:0;right:auto;min-width:min(240px,calc(100vw - 32px))}}.jump-bar{display:grid;grid-template-columns:repeat(26,minmax(0,1fr));gap:clamp(4px,.65vw,10px);width:100%;padding:10px 16px;background:var(--panel);border:1px solid var(--line);border-radius:18px;align-self:start;grid-area:jump}.jump-bar-letter{width:100%;min-width:0;height:30px;border-radius:8px;border:1px solid transparent;background:transparent;color:var(--ink);font-weight:700;font-size:.82rem;letter-spacing:.04em;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;padding:0;min-height:0}.jump-bar-letter:hover:not(.is-disabled):not(.is-active){background:var(--field);border-color:var(--line)}.jump-bar-letter.is-active{background:var(--moss);color:white;border-color:var(--moss-dark)}.jump-bar-letter.is-disabled{opacity:.5;cursor:not-allowed;text-decoration:line-through;text-decoration-thickness:2px}.bird-section-header{display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between}.bird-section-bulk{display:flex;gap:6px}.bird-row-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.bird-row-meta{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center}.bird-meta-field{display:inline-flex;align-items:center;gap:6px;font-weight:600}.bird-meta-field input[type=checkbox]{height:18px;width:18px;accent-color:var(--moss)}.bird-count{align-items:center;gap:6px}.bird-count input{width:70px;padding:6px 8px;border-radius:8px;min-height:32px}.bird-seen-at{margin-left:auto}.bird-row-actions{display:flex;align-items:center;justify-content:space-between;gap:10px}.bird-notes{resize:vertical;min-height:60px;font-family:inherit}.bird-row-compact{padding:10px 12px;gap:6px}.bird-row-compact .bird-row-head strong{font-size:1rem}.bird-row-compact .bird-row-head p{margin:0}.bird-row-compact .bird-row-meta{gap:6px 12px}.bird-row-compact .bird-check input{height:26px;width:26px}.toast-stack{position:fixed;right:16px;bottom:72px;display:flex;flex-direction:column;gap:8px;z-index:50;pointer-events:none}.toast{pointer-events:auto;background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:14px;box-shadow:var(--elevated-shadow);padding:10px 12px 10px 14px;display:flex;align-items:center;gap:10px;max-width:min(360px,90vw);font-weight:600}.toast-error{border-color:var(--danger-text);color:var(--danger-text)}.toast-close{background:transparent;color:inherit;border:0;cursor:pointer;font-size:1.2rem;line-height:1;padding:0 4px;min-height:0;font-weight:700}.sticky-list-header.is-stuck{box-shadow:var(--sticky-shadow-stuck)}@media (max-width:720px){.sticky-list-header{grid-template-columns:1fr}.checklist-controls{width:100%}.checklist-sort{flex:1 1 120px}.bird-row{scroll-margin-top:calc(var(--nav-sticky-height) + 160px)}}