/* ==========================================================================
   Lexis Sophos — Design Tokens
   Palette: "Aegean ink & paper" — a cool marine-ink and bronze system,
   nodding to Greek lexicography without leaning on cliché cream/terracotta.
   ========================================================================== */

:root {
  /* --- Color: light theme ("paper") --- */
  --color-bg: #F4F6F5;              /* cool bone-grey paper */
  --color-bg-raised: #FFFFFF;
  --color-ink: #12313F;             /* marine ink — primary text */
  --color-ink-soft: #3F5762;        /* secondary text */
  --color-ink-faint: #7C8E95;       /* tertiary / meta text */
  --color-rule: #D8DEDC;            /* hairlines & borders */
  --color-accent: #A9782F;          /* aged bronze — signature accent */
  --color-accent-soft: #EFE3CC;     /* bronze tint for chips/backgrounds */
  --color-accent-ink: #7A5720;      /* accent text on light bg */
  --color-focus: #1C6E8C;           /* teal focus ring, distinct from accent */
  --color-error: #A6402F;
  --color-error-bg: #FBEAE6;

  /* --- Type --- */
  --font-display: "Newsreader", ui-serif, Georgia, serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  /* --- Layout --- */
  --content-width: 760px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --shadow-card: 0 1px 2px rgba(18, 49, 63, 0.06), 0 8px 24px -12px rgba(18, 49, 63, 0.18);

  --transition-fast: 140ms ease;
  --transition-med: 240ms cubic-bezier(0.22, 1, 0.36, 1);

  color-scheme: light;
}

:root[data-theme="dark"] {
  --color-bg: #0E1E26;               /* deep marine ink */
  --color-bg-raised: #142B35;
  --color-ink: #E9EEEC;
  --color-ink-soft: #B7C4C7;
  --color-ink-faint: #7C8E95;
  --color-rule: #24404B;
  --color-accent: #D3A75C;           /* brighter bronze for dark bg */
  --color-accent-soft: #2C3B2A;
  --color-accent-ink: #E7C583;
  --color-focus: #6FC3DE;
  --color-error: #E28A78;
  --color-error-bg: #3A1F1B;

  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Reset & base
   ========================================================================== */

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

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition-med), color var(--transition-med);
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; margin: 0; }

a { color: var(--color-accent-ink); text-decoration-color: var(--color-accent); text-underline-offset: 2px; }
a:hover { color: var(--color-accent); }

button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.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;
}
.visually-hidden-defs { position: absolute; }

kbd {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.05em 0.4em;
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-accent-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 2px;
  cursor: pointer;
  font: inherit;
}
.link-btn:hover { color: var(--color-accent); }

/* ==========================================================================
   Signature element: the Greek key (meander) rule
   Used sparingly — under the header and above the footer — as the one
   motif that ties the "Sophos" naming to the visual language.
   ========================================================================== */

.meander-rule {
  height: 16px;
  width: 100%;
  color: var(--color-accent);
  opacity: 0.55;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='16' viewBox='0 0 40 16'%3E%3Cpath d='M0 16 V4 H12 V0 H24 V12 H32 V4 H40' fill='none' stroke='%23A9782F' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-size: 40px 16px;
}
:root[data-theme="dark"] .meander-rule {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='16' viewBox='0 0 40 16'%3E%3Cpath d='M0 16 V4 H12 V0 H24 V12 H32 V4 H40' fill='none' stroke='%23D3A75C' stroke-width='2'/%3E%3C/svg%3E");
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header { position: sticky; top: 0; z-index: 10; background: var(--color-bg); }

.header-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 20px 24px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-ink);
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.9rem;
  line-height: 1;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-text { display: flex; flex-direction: column; }
.brand-name { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; letter-spacing: 0.01em; }
.brand-tagline { font-size: 0.72rem; color: var(--color-ink-faint); font-family: var(--font-mono); letter-spacing: 0.02em; }

.theme-toggle {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-rule);
  border-radius: 999px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--color-ink-soft);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.theme-toggle:hover { color: var(--color-accent); transform: translateY(-1px); }

.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: none; }
:root[data-theme="dark"] .icon-moon { display: block; }

/* ==========================================================================
   Search hero
   ========================================================================== */

.search-hero {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 56px 24px 32px;
  text-align: center;
  transition: padding var(--transition-med);
}

.search-hero.is-compact {
  padding-top: 28px;
  padding-bottom: 20px;
}
.search-hero.is-compact .hero-title { font-size: 1.6rem; }
.search-hero.is-compact .hero-sub { display: none; }
.search-hero.is-compact .search-hint { display: none; }

.hero-title {
  font-size: clamp(2rem, 5vw, 2.85rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: font-size var(--transition-med);
}

.hero-sub {
  margin: 14px auto 0;
  max-width: 46ch;
  color: var(--color-ink-soft);
  font-size: 1rem;
}

.search-form {
  margin: 28px auto 0;
  max-width: 520px;
  display: flex;
  align-items: center;
  background: var(--color-bg-raised);
  border: 1.5px solid var(--color-rule);
  border-radius: var(--radius-md);
  padding: 6px 6px 6px 20px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-fast);
}
.search-form:focus-within { border-color: var(--color-accent); }

#searchInput {
  flex: 1;
  border: none;
  background: transparent;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-ink);
  padding: 10px 8px;
  min-width: 0;
}
#searchInput::placeholder { color: var(--color-ink-faint); font-style: italic; }
#searchInput:focus { outline: none; }

.search-submit {
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.search-submit:hover { background: var(--color-accent-ink); transform: translateY(-1px); }
.search-submit .icon { stroke: #fff; }

.search-hint {
  margin: 14px 0 0;
  font-size: 0.85rem;
  color: var(--color-ink-faint);
}

.recent-words {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.recent-words:empty { margin-top: 0; }

.recent-word-chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--color-accent-soft);
  color: var(--color-accent-ink);
  border: none;
  border-radius: 999px;
  padding: 5px 12px;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.recent-word-chip:hover { background: var(--color-accent); color: #fff; }

/* ==========================================================================
   Results region — states: loading / error / entry
   ========================================================================== */

.results {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.state {
  text-align: center;
  padding: 48px 24px;
  color: var(--color-ink-soft);
}

.loader {
  width: 28px; height: 28px;
  margin: 0 auto 16px;
  border: 3px solid var(--color-rule);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.state-error {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-md);
  color: var(--color-ink);
}
.state-error-title { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; margin-bottom: 6px; color: var(--color-error); }
.state-error-body { color: var(--color-ink-soft); margin: 0; }

/* --- Entry card --- */

.entry {
  animation: entry-in var(--transition-med) both;
}
@keyframes entry-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.entry-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-rule);
  margin-bottom: 24px;
}

.entry-word {
  font-size: clamp(2.1rem, 6vw, 3rem);
  font-weight: 600;
  color: var(--color-ink);
}

.entry-phonetics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.phonetic-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-rule);
  border-radius: 999px;
  padding: 4px 10px 4px 6px;
}

.audio-btn {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: none;
  background: var(--color-accent-soft);
  color: var(--color-accent-ink);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.audio-btn:hover { background: var(--color-accent); color: #fff; }
.audio-btn.is-playing { background: var(--color-accent); color: #fff; }
.audio-btn .icon { width: 13px; height: 13px; }

.entry-origin {
  flex-basis: 100%;
  font-size: 0.9rem;
  color: var(--color-ink-faint);
  font-style: italic;
}

/* --- Meanings (grouped by part of speech) --- */

.meaning-block {
  margin-bottom: 30px;
}
.meaning-block:last-child { margin-bottom: 0; }

.meaning-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.part-of-speech {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--color-accent-ink);
}

.meaning-rule {
  flex: 1;
  height: 1px;
  background: var(--color-rule);
}

.definitions-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: def-counter;
}

.definition-item {
  counter-increment: def-counter;
  position: relative;
  padding-left: 34px;
  margin-bottom: 18px;
}
.definition-item:last-child { margin-bottom: 0; }

.definition-item::before {
  content: counter(def-counter);
  position: absolute;
  left: 0;
  top: 0.05em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  width: 22px; height: 22px;
  display: grid;
  place-items: center;
}

.definition-text { margin: 0; color: var(--color-ink); }

.definition-example {
  margin: 8px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--color-accent-soft);
  color: var(--color-ink-soft);
  font-style: italic;
}

.word-relations {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  align-items: center;
  font-size: 0.85rem;
}

.relation-label {
  color: var(--color-ink-faint);
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.relation-tag {
  background: none;
  border: 1px solid var(--color-rule);
  color: var(--color-ink-soft);
  border-radius: 999px;
  padding: 2px 10px;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.relation-tag:hover { border-color: var(--color-accent); color: var(--color-accent-ink); }
.relation-tag.antonym { border-style: dashed; }

/* --- Meaning-level synonyms/antonyms (outside individual definitions) --- */
.meaning-relations { margin-top: 12px; }

/* --- Source attribution --- */

.entry-sources {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--color-rule);
  font-size: 0.8rem;
  color: var(--color-ink-faint);
}
.entry-sources a { color: var(--color-ink-faint); text-decoration-color: var(--color-rule); }

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer { margin-top: 40px; }
.footer-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
  text-align: center;
  color: var(--color-ink-faint);
  font-size: 0.85rem;
}
.footer-inner p { margin: 0 0 6px; }
.footer-meta { font-family: var(--font-mono); font-size: 0.75rem; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 600px) {
  .header-inner { padding: 16px 18px 12px; }
  .brand-tagline { display: none; }
  .search-hero { padding: 36px 18px 24px; }
  .search-form { padding-left: 14px; }
  #searchInput { font-size: 1rem; }
  .results { padding: 0 18px 60px; }
  .entry-word { font-size: 2rem; }
  .definition-item { padding-left: 30px; }
}