:root {
  color-scheme: light dark;
  --canvas: #f2f6f4;
  --surface: #ffffff;
  --surface-subtle: #f8faf9;
  --ink: #17201c;
  --muted: #68726d;
  --quiet: #89928e;
  --line: rgba(23, 32, 28, .1);
  --line-strong: rgba(23, 32, 28, .17);
  --accent: #087f91;
  --green: #2f8f67;
  --red: #c64444;
  --radius: 15px;
  --radius-small: 10px;
  --page-gutter: clamp(20px, 3.5vw, 64px);
  --shadow: 0 1px 2px rgba(18, 42, 31, .03), 0 14px 34px rgba(18, 42, 31, .045);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #090d0b;
    --surface: #171c19;
    --surface-subtle: #111613;
    --ink: #f1f5f3;
    --muted: #a4ada8;
    --quiet: #87908b;
    --line: rgba(255, 255, 255, .11);
    --line-strong: rgba(255, 255, 255, .19);
    --accent: #4fc2d3;
    --green: #70c796;
    --red: #ff7671;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body { min-height: 100vh; margin: 0; background: var(--canvas); color: var(--ink); font: 15px/1.45 var(--font); -webkit-font-smoothing: antialiased; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-header, .page-shell, footer { width: 100%; padding-inline: var(--page-gutter); }
.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 64px; border-bottom: 1px solid var(--line); }
.wordmark { font-size: .95rem; font-weight: 720; letter-spacing: -.02em; }
.top-navigation { display: flex; align-items: center; gap: 20px; color: var(--muted); font-size: .8rem; }
.sync-status { display: flex; align-items: center; gap: 7px; }
.sync-status i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 14%, transparent); }
.sync-status.is-syncing i { background: var(--quiet); box-shadow: none; animation: pulse 900ms infinite alternate; }
.sync-status.is-error i { background: var(--red); box-shadow: none; }
.text-button, .close-button { padding: 0; border: 0; background: none; color: var(--muted); cursor: pointer; }
.text-button:hover, .close-button:hover { color: var(--ink); }
.page-shell { min-height: calc(100vh - 125px); }
section { padding: 32px 0 36px; border-bottom: 1px solid var(--line); }
.section-label { margin: 0 0 7px; color: var(--green); font-size: .68rem; font-weight: 760; letter-spacing: .09em; text-transform: uppercase; }
.muted-label { color: var(--quiet); }

.login-panel { width: min(520px, 100%); margin: 0 auto; padding: clamp(64px, 12vh, 116px) 0; border: 0; }
.login-form { display: grid; gap: 12px; }
.login-panel h1 { margin: 0; font-size: clamp(2.7rem, 6vw, 4.5rem); letter-spacing: -.058em; line-height: .96; }
.login-copy { margin: 1px 0 9px; color: var(--muted); }
.remember-toggle { display: flex; align-items: center; justify-content: space-between; margin-top: 2px; color: var(--muted); cursor: pointer; font-size: .78rem; }
.remember-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.remember-toggle i { position: relative; width: 34px; height: 20px; border-radius: 20px; background: var(--line-strong); transition: background 140ms; }
.remember-toggle i::after { position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: var(--surface); box-shadow: 0 1px 3px rgba(0, 0, 0, .24); content: ""; transition: transform 140ms; }
.remember-toggle input:checked + i { background: var(--green); }
.remember-toggle input:checked + i::after { transform: translateX(14px); }

input[type="password"], input[type="text"], input[type="date"], select, textarea { width: 100%; border: 1px solid var(--line-strong); border-radius: var(--radius-small); background: var(--surface); color: var(--ink); }
input[type="password"], input[type="text"], input[type="date"], select { height: 46px; padding: 0 13px; }
input[type="password"].invalid { border-color: var(--red); }
textarea { display: block; min-height: 80px; padding: 11px 13px; line-height: 1.5; resize: vertical; }
::placeholder { color: color-mix(in srgb, var(--quiet) 72%, transparent); }
.composer label > span, .dialog-form label > span, .task-fields label > span, .colour-field > span { color: var(--muted); font-size: .72rem; font-weight: 680; }
.primary-button { min-height: 43px; padding: 10px 17px; border: 0; border-radius: var(--radius-small); background: var(--ink); color: var(--canvas); font-weight: 700; cursor: pointer; }
.primary-button:hover { opacity: .88; }
.primary-button:disabled { cursor: wait; opacity: .5; }
.danger-button { padding: 9px 0; border: 0; background: none; color: var(--red); font-weight: 650; cursor: pointer; }
.form-message { min-height: 18px; margin: 8px 0 0; color: var(--red); font-size: .78rem; }

.hero-section { padding-top: 36px; }
.hero-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; }
.hero-heading h1 { margin: 0; font-size: clamp(3.1rem, 6.5vw, 5.8rem); font-weight: 730; letter-spacing: -.064em; line-height: .9; }
.hero-count { margin: 0 0 4px; color: var(--muted); font-size: .8rem; }
.group-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; margin-top: 26px; }
.group-card { --group-accent: var(--green); display: flex; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.group-filter-button { display: grid; grid-template-columns: 9px minmax(0, 1fr); align-items: center; gap: 11px; flex: 1; min-width: 0; padding: 14px; border: 0; background: none; color: inherit; text-align: left; cursor: pointer; }
.group-filter-button:hover { background: var(--surface-subtle); }
.group-filter-button i { width: 9px; height: 32px; border-radius: 8px; background: var(--group-accent); }
.group-filter-button span { display: grid; min-width: 0; }
.group-filter-button strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .9rem; }
.group-filter-button small { color: var(--quiet); font-size: .7rem; }
.group-edit-button { align-self: stretch; width: 38px; border: 0; border-left: 1px solid var(--line); background: none; color: var(--quiet); cursor: pointer; }
.group-edit-button:hover { background: var(--surface-subtle); color: var(--ink); }
.add-group-button { display: flex; align-items: center; gap: 10px; min-height: 62px; padding: 13px 15px; border: 1px dashed var(--line-strong); border-radius: var(--radius); background: transparent; color: var(--muted); cursor: pointer; }
.add-group-button:hover { border-color: var(--green); color: var(--ink); }
.add-group-button span { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: color-mix(in srgb, var(--green) 12%, transparent); color: var(--green); font-size: 1.2rem; }

.planner-section { padding-top: 30px; }
.inline-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.inline-heading h2 { margin: 0; font-size: clamp(1.6rem, 2.4vw, 2.2rem); letter-spacing: -.042em; line-height: 1.05; }
.compact-heading { margin-bottom: 15px; }
.composer { display: grid; gap: 13px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.composer-title, .composer-grid > label, .notes-field { display: grid; gap: 6px; }
.composer-title input { height: 52px; font-size: 1.02rem; font-weight: 600; }
.composer-grid { display: grid; grid-template-columns: 1.2fr 1fr .8fr 1fr; gap: 10px; }
.composer-actions { display: flex; align-items: end; justify-content: space-between; gap: 18px; }
.colour-field { display: flex; align-items: center; gap: 9px; }
.colour-field input[type="color"] { width: 38px; height: 30px; padding: 2px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface); }

.list-section { padding-top: 30px; }
.filters { display: flex; gap: 8px; }
.filters select { width: auto; min-width: 132px; height: 38px; padding-inline: 10px 30px; font-size: .76rem; }
.task-list { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.task-row { --task-accent: var(--green); position: relative; display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; gap: 12px; min-height: 92px; padding: 15px; border-bottom: 1px solid var(--line); background: var(--surface); transition: background 120ms, opacity 120ms; }
.task-row::before { position: absolute; inset: 0 auto 0 0; width: 6px; background: var(--task-accent); content: ""; }
.task-row:last-child { border-bottom: 0; }
.task-row:hover { background: var(--surface-subtle); }
.task-row.dragging { opacity: .42; }
.task-row.drag-over { box-shadow: inset 0 2px 0 var(--accent); }
.task-row.is-overdue::before { background: var(--red); }
.completion-button { display: grid; place-items: center; width: 25px; height: 25px; margin-top: 1px; padding: 0; border: 1.5px solid var(--line-strong); border-radius: 50%; background: transparent; cursor: pointer; }
.completion-button:hover { border-color: var(--task-accent); }
.completion-button span { width: 8px; height: 4px; border-bottom: 1.5px solid transparent; border-left: 1.5px solid transparent; transform: rotate(-45deg); }
.task-content { min-width: 0; }
.task-heading { display: flex; align-items: baseline; gap: 9px; }
.task-heading h3 { min-width: 0; margin: 0; overflow-wrap: anywhere; font-size: 1rem; letter-spacing: -.018em; }
.editable-text { cursor: text; outline: 0; }
.editable-text:focus { border-radius: 4px; background: color-mix(in srgb, var(--task-accent) 8%, transparent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--task-accent) 8%, transparent); }
.editable-text:empty::before { color: var(--quiet); content: attr(data-placeholder); opacity: .7; }
.priority-badge { color: var(--quiet); font-size: .62rem; font-weight: 760; letter-spacing: .06em; text-transform: uppercase; }
.priority-badge.high, .priority-badge.urgent { color: var(--task-accent); }
.task-notes { min-height: 18px; margin: 4px 0 0; color: var(--muted); white-space: pre-wrap; overflow-wrap: anywhere; font-size: .82rem; }
.task-fields { display: flex; gap: 7px; margin-top: 10px; }
.task-fields label { display: flex; align-items: center; gap: 5px; }
.task-fields input, .task-fields select { width: auto; max-width: 150px; height: 31px; padding: 0 8px; border-color: var(--line); background: var(--surface-subtle); font-size: .7rem; }
.task-fields label > span { display: none; }
.task-meta { display: flex; gap: 10px; margin-top: 7px; color: var(--quiet); font-size: .69rem; }
.date-state { color: var(--muted); font-weight: 650; }
.is-overdue .date-state { color: var(--red); }
.task-author { display: inline-block; min-width: 28px; }
.task-actions { display: flex; align-items: flex-start; gap: 3px; }
.icon-button { min-height: 28px; padding: 5px 7px; border: 0; border-radius: 7px; background: transparent; color: var(--quiet); font-size: .72rem; cursor: pointer; }
.icon-button:hover { background: var(--line); color: var(--ink); }
.icon-button:disabled { opacity: .25; cursor: default; }
.delete-button:hover { background: color-mix(in srgb, var(--red) 10%, transparent); color: var(--red); }
.drag-handle { padding: 2px 2px 0 5px; color: var(--quiet); cursor: grab; font-size: 1.15rem; line-height: 24px; }
.empty-state { display: grid; place-items: center; min-height: 116px; padding: 22px; color: var(--muted); text-align: center; }
.empty-state strong { color: var(--ink); }
.completed-section { border-bottom: 0; }
.completed-list .task-row { opacity: .66; }
.completed-list .task-heading h3 { text-decoration: line-through; text-decoration-color: var(--quiet); }
.completed-list .completion-button { border-color: var(--task-accent); background: var(--task-accent); }
.completed-list .completion-button span { border-color: #000; }
.completed-list .task-fields, .completed-list .move-up, .completed-list .move-down, .completed-list .drag-handle { display: none; }

dialog { width: min(440px, calc(100% - 32px)); padding: 0; border: 1px solid var(--line-strong); border-radius: 18px; background: var(--surface); color: var(--ink); box-shadow: 0 24px 90px rgba(0, 0, 0, .28); }
dialog::backdrop { background: rgba(4, 10, 7, .45); backdrop-filter: blur(3px); }
.dialog-form { display: grid; gap: 14px; padding: 22px; }
.dialog-form > label:not(.colour-field) { display: grid; gap: 6px; }
.dialog-heading, .dialog-actions { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.dialog-heading h2 { margin: 0; font-size: 1.7rem; letter-spacing: -.04em; }
.close-button { font-size: 1.8rem; line-height: 1; }
.dialog-actions { margin-top: 2px; }

footer { display: flex; justify-content: space-between; padding-block: 20px 28px; border-top: 1px solid var(--line); color: var(--quiet); font-size: .7rem; }
@keyframes pulse { to { opacity: .28; } }

@media (max-width: 860px) {
  .composer-grid { grid-template-columns: 1fr 1fr; }
  .inline-heading { align-items: flex-start; flex-direction: column; }
  .filters { width: 100%; }
  .filters select { flex: 1; min-width: 0; }
  .task-row { grid-template-columns: 30px minmax(0, 1fr); }
  .task-actions { grid-column: 2; }
  .drag-handle { margin-left: auto; }
}

@media (max-width: 600px) {
  :root { --page-gutter: 16px; }
  .site-header { min-height: 58px; }
  .sync-status span { display: none; }
  .hero-heading { align-items: flex-start; flex-direction: column; gap: 12px; }
  .hero-heading h1 { font-size: clamp(3.4rem, 17vw, 5rem); }
  .group-strip { grid-template-columns: 1fr; }
  .composer { padding: 14px; }
  .composer-grid { grid-template-columns: 1fr; }
  .composer-actions { align-items: stretch; flex-direction: column; }
  .composer-actions .primary-button { width: 100%; }
  .filters { display: grid; grid-template-columns: 1fr 1fr; }
  .filters select:last-child { grid-column: 1 / -1; }
  .task-row { gap: 8px; padding: 13px 10px 13px 14px; }
  .task-fields { display: grid; grid-template-columns: 1fr 1fr; }
  .task-fields select, .task-fields input { width: 100%; max-width: none; }
  .task-priority { grid-column: 1 / -1; }
  .move-up, .move-down { display: none; }
}

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation: none !important; } }