:root {
  color-scheme: light;
  --bg: #eeeae2;
  --surface-solid: #fbfaf6;
  --surface-soft: #f1eee7;
  --surface-raised: #fffefa;
  --text: #26322f;
  --muted: #68736f;
  --border: #d7d8d0;
  --primary: #47765d;
  --primary-hover: #37634c;
  --primary-soft: #deebe2;
  --danger: #9b4747;
  --danger-soft: #f5e7e5;
  --amber: #c28b28;
  --shadow: 0 20px 60px rgba(42, 50, 46, 0.11);
  font-family: Inter, ui-rounded, "Segoe UI", system-ui, sans-serif;
}
body.dark-theme {
  color-scheme: dark;
  --bg: #171c1b;
  --surface-solid: #222a28;
  --surface-soft: #2a3431;
  --surface-raised: #252e2c;
  --text: #f2f2eb;
  --muted: #abb5b0;
  --border: #3c4945;
  --primary: #78b18e;
  --primary-hover: #91c4a3;
  --primary-soft: #294536;
  --danger: #e29a99;
  --danger-soft: #4b302f;
  --ink: #f2f2eb;
  --paper: #171c1b;
  --surface: color-mix(in srgb, #222a28 92%, transparent);
  --line: color-mix(in srgb, #3c4945 82%, transparent);
  --green: #78b18e;
  --green-dark: #78b18e;
  --green-soft: #294536;
  --shadow: 0 20px 60px rgb(0 0 0 / 24%);
}
body.pastel-theme {
  color-scheme: light;
  --bg: #efdfb9;
  --surface-solid: #fbefd4;
  --surface-soft: #efdfce;
  --surface-raised: #fff3da;
  --text: #463b43;
  --muted: #756970;
  --border: #ddc9b2;
  --primary: #7b628f;
  --primary-hover: #674f7b;
  --primary-soft: #eaddec;
  --danger: #a65262;
  --danger-soft: #f3d9dc;
  --ink: #463b43;
  --paper: #efdfb9;
  --surface: color-mix(in srgb, #fbefd4 92%, transparent);
  --line: color-mix(in srgb, #ddc9b2 82%, transparent);
  --green: #7b628f;
  --green-dark: #7b628f;
  --green-soft: #eaddec;
}

* { box-sizing: border-box; }
body {
  --ink: var(--text);
  --paper: var(--bg);
  --surface: color-mix(in srgb, var(--surface-solid) 92%, transparent);
  --line: color-mix(in srgb, var(--border) 82%, transparent);
  --green: var(--primary);
  --green-dark: var(--primary);
  --green-soft: var(--primary-soft);
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 5%, color-mix(in srgb, var(--amber) 16%, transparent), transparent 29rem),
    radial-gradient(circle at 93% 15%, color-mix(in srgb, var(--primary) 14%, transparent), transparent 32rem),
    var(--paper);
  min-height: 100vh;
  transition: color .2s ease, background-color .2s ease;
}
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }

.site-header {
  min-height: 86px;
  padding: 12px clamp(20px, 5vw, 72px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(18px);
}
.brand img { width: 170px; height: auto; display: block; }
.header-actions, .site-header nav, footer nav { display: flex; gap: 10px; align-items: center; }
.site-header nav a, footer nav a {
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  color: var(--muted);
}
.appearance-picker { position: relative; }
.appearance-picker summary {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
  background: var(--surface-raised);
  font-size: .8rem;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}
.appearance-picker summary::-webkit-details-marker { display: none; }
.appearance-menu {
  position: absolute;
  z-index: 10;
  top: calc(100% + 8px);
  right: 0;
  width: 148px;
  display: grid;
  gap: 4px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-raised);
  box-shadow: var(--shadow);
}
.appearance-menu button {
  min-height: 39px;
  border: 0;
  border-radius: 9px;
  padding: 8px 10px;
  color: var(--text);
  background: transparent;
  font-weight: 750;
  text-align: left;
  cursor: pointer;
}
.appearance-menu button:hover, .appearance-menu button.selected { color: var(--primary); background: var(--primary-soft); }
.site-header nav a:hover, .site-header nav a:focus-visible, .site-header nav a[aria-current] {
  background: var(--green-soft);
  color: var(--green-dark);
}

main { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 68px 0 72px; }
.intro { max-width: 760px; margin-bottom: 36px; }
.eyebrow {
  margin: 0 0 8px;
  color: var(--green);
  font-size: .75rem;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
}
h1 { margin: 0; max-width: 720px; font-size: clamp(2.3rem, 6vw, 4.7rem); line-height: .98; letter-spacing: -.055em; }
.intro > p:last-child { max-width: 680px; margin: 22px 0 0; color: var(--muted); font-size: 1.06rem; line-height: 1.65; }
h2 { margin: 0; font-size: clamp(1.45rem, 3vw, 2rem); letter-spacing: -.03em; }

.workspace { display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; margin-top: 22px; align-items: start; }
.maker-panel, .guide-panel, .library {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.maker-panel { padding: clamp(22px, 4vw, 38px); }
.guide-panel { padding: 0; overflow: hidden; }
.guide-panel summary {
  display: flex;
  min-height: 84px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 28px;
  cursor: pointer;
  list-style: none;
}
.guide-panel summary::-webkit-details-marker { display: none; }
.guide-panel summary strong { display: block; font-size: clamp(1.25rem, 2.5vw, 1.7rem); letter-spacing: -.03em; }
.guide-panel summary .eyebrow { display: block; }
.guide-toggle {
  flex: 0 0 auto;
  min-width: 70px;
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 8px 12px;
  background: var(--surface-raised);
  color: var(--green-dark);
  font-size: .78rem;
  font-weight: 850;
  text-align: center;
}
.guide-panel:not([open]) .guide-toggle::before { content: "Show"; font-size: .78rem; }
.guide-panel:not([open]) .guide-toggle { font-size: 0; }
.guide-content { padding: 0 28px 27px; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.section-heading p { margin: 8px 0 0; color: var(--muted); }
.size-switch { display: flex; gap: 4px; padding: 4px; border-radius: 14px; background: var(--surface-soft); }
.size-option {
  min-width: 62px;
  border: 0;
  border-radius: 10px;
  padding: 9px 12px;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
  cursor: pointer;
}
.size-option.selected { background: var(--surface-raised); color: var(--green-dark); box-shadow: 0 2px 8px rgba(30, 40, 35, .12); }

form { margin-top: 30px; }
.field { display: grid; gap: 8px; }
.field > span, legend { font-weight: 800; }
.field small, fieldset > p { color: var(--muted); line-height: 1.45; }
input {
  width: 100%;
  min-height: 50px;
  border: 1px solid color-mix(in srgb, var(--border) 78%, var(--text));
  border-radius: 13px;
  padding: 11px 14px;
  color: var(--ink);
  background: var(--surface-raised);
  outline: none;
}
input:focus { border-color: var(--green); box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent); }
input.invalid { border-color: var(--danger); }
fieldset { margin: 28px 0 0; padding: 0; border: 0; }
fieldset > p { margin: 6px 0 14px; font-size: .9rem; }
.word-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.word-input { position: relative; }
.word-input label { position: absolute; top: 50%; left: 14px; transform: translateY(-50%); color: var(--muted); font-size: .76rem; font-weight: 800; }
.word-input input { padding-left: 82px; text-transform: uppercase; font-weight: 800; letter-spacing: .08em; }
.form-status { min-height: 25px; margin-top: 14px; color: var(--danger); font-size: .9rem; }

.primary-action, .quiet-button, .text-button {
  border: 0;
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
}
.primary-action {
  display: flex;
  width: 100%;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  padding: 12px 20px;
  color: white;
  background: linear-gradient(145deg, color-mix(in srgb, var(--primary) 86%, white), var(--green-dark));
  box-shadow: 0 9px 20px color-mix(in srgb, var(--primary) 24%, transparent);
  transition: transform .16s ease, box-shadow .16s ease;
}
.primary-action:hover { transform: translateY(-1px); box-shadow: 0 12px 25px color-mix(in srgb, var(--primary) 29%, transparent); }
.primary-action:active { transform: translateY(1px) scale(.99); }
.primary-action:disabled { opacity: .6; cursor: wait; }
.primary-action.compact { width: auto; min-width: 170px; }
.quiet-button { min-height: 42px; border: 1px solid var(--line); border-radius: 12px; padding: 9px 15px; background: var(--surface-raised); color: var(--ink); }
.text-button { padding: 10px; background: transparent; color: var(--green-dark); }

.guide-panel ol { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; margin: 25px 0; padding: 0; list-style: none; counter-reset: step; }
.guide-panel li { display: grid; grid-template-columns: 34px 1fr; gap: 3px 12px; counter-increment: step; }
.guide-panel li::before {
  content: counter(step);
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-weight: 900;
}
.guide-panel li strong { line-height: 1.4; }
.guide-panel li span { color: var(--muted); font-size: .9rem; line-height: 1.5; }
.privacy-note { padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px; background: color-mix(in srgb, var(--surface-soft) 65%, transparent); }
.privacy-note p { margin: 7px 0 0; color: var(--muted); font-size: .86rem; line-height: 1.55; }

.library { margin-top: 22px; padding: clamp(22px, 4vw, 34px); }
.library-status { padding: 32px 0 10px; color: var(--muted); text-align: center; }
.puzzle-library { display: grid; gap: 22px; margin-top: 24px; }
.library-group { overflow: hidden; border: 1px solid var(--line); border-radius: 20px; }
.library-group-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
}
.library-group-heading h3 { margin: 0; font-size: 1rem; }
.library-group-heading span { color: var(--muted); font-size: .75rem; font-weight: 750; }
.size-4-group .library-group-heading { background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--green-dark); }
.size-5-group .library-group-heading { background: color-mix(in srgb, #6576b4 14%, transparent); color: color-mix(in srgb, #6576b4 75%, var(--text)); }
.puzzle-library-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 14px; }
.puzzle-card { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: 16px; padding: 19px; background: color-mix(in srgb, var(--surface-raised) 72%, transparent); }
.puzzle-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; }
.puzzle-card.size-4::before { background: var(--green); }
.puzzle-card.size-5::before { background: #5268a9; }
.puzzle-card.size-5 .size-tag { background: color-mix(in srgb, #6576b4 18%, var(--surface-soft)); color: color-mix(in srgb, #6576b4 72%, var(--text)); }
.puzzle-card.unpublished { opacity: .68; }
.card-top, .card-actions { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.size-tag, .status-tag { display: inline-flex; border-radius: 999px; padding: 5px 9px; font-size: .72rem; font-weight: 850; }
.size-tag { background: var(--green-soft); color: var(--green-dark); }
.status-tag { background: var(--surface-soft); color: var(--muted); }
.puzzle-card h3 { margin: 17px 0 6px; font-size: 1.2rem; }
.words { min-height: 38px; margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.45; }
.card-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 18px 0; }
.card-stats div { text-align: center; padding: 9px 4px; border-radius: 10px; background: var(--surface-soft); }
.card-stats strong, .card-stats span { display: block; }
.card-stats strong { font-size: 1.03rem; }
.card-stats span { margin-top: 2px; color: var(--muted); font-size: .68rem; text-transform: uppercase; letter-spacing: .06em; }
.card-actions { justify-content: flex-start; flex-wrap: wrap; }
.card-actions a, .card-actions button {
  border: 0;
  border-radius: 10px;
  padding: 8px 10px;
  background: var(--green-soft);
  color: var(--green-dark);
  font: inherit;
  font-size: .78rem;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}
.card-actions .danger { background: var(--danger-soft); color: var(--danger); }
.card-actions .delete { border: 1px solid color-mix(in srgb, var(--danger) 28%, transparent); background: transparent; color: var(--danger); }
.expiry { margin: 14px 0 0; color: var(--muted); font-size: .72rem; }

dialog { width: min(520px, calc(100% - 28px)); border: 1px solid var(--line); border-radius: 24px; padding: 0; color: var(--ink); background: var(--surface-raised); box-shadow: 0 30px 90px rgba(20,28,24,.3); }
dialog::backdrop { background: rgba(25, 33, 29, .54); backdrop-filter: blur(4px); }
.dialog-card { padding: clamp(24px, 5vw, 38px); }
.dialog-card > p { color: var(--muted); line-height: 1.55; }
.review-category { margin: 22px 0 12px; font-size: 1.2rem; font-weight: 850; }
.review-words { display: flex; flex-wrap: wrap; gap: 8px; }
.review-words span { border-radius: 9px; padding: 7px 9px; background: var(--green-soft); color: var(--green-dark); font-weight: 850; letter-spacing: .04em; }
.dialog-note { font-size: .82rem; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 24px; }
#success-dialog .text-button { display: block; margin: 10px auto 0; }
.destructive-action {
  min-height: 42px;
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
  border-radius: 12px;
  padding: 9px 15px;
  color: white;
  background: var(--danger);
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}
.destructive-action:disabled { opacity: .6; cursor: wait; }

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  padding: 22px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: color-mix(in srgb, var(--surface-solid) 76%, transparent);
}
.footer-brand { display: flex; align-items: center; color: var(--ink); text-decoration: none; }
.footer-brand img { display: block; width: auto; height: 25px; object-fit: contain; }
footer p { margin: 0; text-align: center; font-size: .82rem; }
footer nav { justify-content: flex-end; }

@media (max-width: 780px) {
  .site-header { min-height: 72px; padding: 10px 16px; }
  .brand img { width: 126px; }
  .site-header nav a { padding: 9px; font-size: .84rem; }
  .appearance-picker summary { width: 42px; padding: 0; justify-content: center; font-size: 0; }
  .appearance-picker summary::before { content: "Aa"; font-size: .78rem; }
  main { padding-top: 42px; }
  .workspace { grid-template-columns: 1fr; }
  .guide-panel ol { grid-template-columns: 1fr; }
  .word-fields, .puzzle-library-grid { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr auto; }
  footer p { display: none; }
}

@media (max-width: 480px) {
  .section-heading { align-items: stretch; flex-direction: column; }
  .guide-panel summary { min-height: 76px; padding: 17px 19px; }
  .guide-content { padding: 0 19px 20px; }
  .size-switch { align-self: stretch; }
  .size-option { flex: 1; }
  .dialog-actions { flex-direction: column-reverse; }
  .dialog-actions > * { width: 100% !important; }
  .site-header nav a:first-child { display: none; }
}

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