/* ============================================================
   PhoneticAlphabet.org — Styles
   Aesthetic: Aviation instrument panel meets field manual
   Palette: Deep slate/navy + amber signal + warm paper whites
   ============================================================ */

/* --- VARIABLES ------------------------------------------- */
:root {
  /* Core palette */
  --c-bg:         #0e1117;
  --c-bg-raised:  #161b22;
  --c-bg-card:    #1c2129;
  --c-surface:    #222830;
  --c-border:     #2d333b;
  --c-border-lt:  #3d444d;

  /* Text */
  --c-text:       #e6edf3;
  --c-text-mid:   #9eabb8;
  --c-text-dim:   #6e7a88;

  /* Accent: Amber Signal */
  --c-amber:      #f0a500;
  --c-amber-dim:  #c48800;
  --c-amber-glow: rgba(240, 165, 0, .12);

  /* Accent: Teal utility */
  --c-teal:       #3fb8af;
  --c-teal-dim:   rgba(63,184,175,.15);

  /* Accent: Coral history */
  --c-coral:      #e0604e;
  --c-coral-dim:  rgba(224,96,78,.12);

  /* Accent: Purple IPA */
  --c-violet:     #a78bfa;
  --c-violet-dim: rgba(167,139,250,.12);

  /* Typography */
  --f-display:    'Instrument Serif', Georgia, serif;
  --f-body:       'DM Sans', system-ui, sans-serif;
  --f-mono:       'DM Mono', 'Menlo', monospace;

  /* Spacing */
  --sp-xs: .25rem;
  --sp-sm: .5rem;
  --sp-md: 1rem;
  --sp-lg: 1.5rem;
  --sp-xl: 2.5rem;
  --sp-2xl: 4rem;

  /* Radius */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;

  /* Transitions */
  --ease: cubic-bezier(.4,0,.2,1);
  --dur: .2s;

  /* Layout */
  --max-w: 1140px;
}

/* --- RESET ----------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--c-amber); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: #ffc44d; }
ul, ol { list-style: none; }
button { cursor: pointer; font: inherit; border: none; background: none; color: inherit; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; }

/* --- UTILITY --------------------------------------------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--sp-lg); }
.skip-link {
  position: absolute; top: -100%; left: var(--sp-md); z-index: 9999;
  padding: var(--sp-sm) var(--sp-md); background: var(--c-amber); color: var(--c-bg); border-radius: var(--r-sm);
  font-weight: 600; font-size: .875rem;
}
.skip-link:focus { top: var(--sp-md); }

/* --- HEADER ---------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(14,17,23,.92);
  backdrop-filter: blur(14px) saturate(1.6);
  -webkit-backdrop-filter: blur(14px) saturate(1.6);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-md) var(--sp-lg);
}
.logo { display: flex; align-items: center; gap: .5rem; text-decoration: none; color: var(--c-text); }
.logo-icon { font-size: 1.15rem; color: var(--c-amber); line-height: 1; }
.logo-text { font-family: var(--f-body); font-size: 1.05rem; font-weight: 400; letter-spacing: -.01em; }
.logo-text strong { font-weight: 700; }
.logo-ext { color: var(--c-text-dim); font-weight: 400; }
.logo--footer .logo-ext { color: var(--c-text-dim); }

/* Nav */
.nav-list { display: flex; align-items: center; gap: var(--sp-xs); }
.nav-link {
  display: inline-flex; align-items: center; gap: .25rem;
  padding: .45rem .75rem; border-radius: var(--r-sm);
  font-size: .875rem; font-weight: 500; color: var(--c-text-mid);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--c-text); background: var(--c-surface); }
.nav-link-cta {
  background: var(--c-amber); color: var(--c-bg) !important; font-weight: 600;
  border-radius: var(--r-sm);
}
.nav-link-cta:hover { background: #ffc44d; color: var(--c-bg) !important; }
.caret { font-size: .65rem; }

/* Dropdown */
.nav-dropdown { position: relative; }
.dropdown-menu {
  display: none; position: absolute; top: calc(100% + .35rem); left: 0;
  min-width: 220px; padding: var(--sp-sm) 0;
  background: var(--c-bg-card); border: 1px solid var(--c-border);
  border-radius: var(--r-md); box-shadow: 0 12px 40px rgba(0,0,0,.45);
}
.dropdown-menu a {
  display: block; padding: .5rem 1rem; font-size: .875rem; color: var(--c-text-mid);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.dropdown-menu a:hover { background: var(--c-surface); color: var(--c-text); }
.nav-dropdown.open .dropdown-menu { display: block; }

/* Mobile nav toggle */
.nav-toggle { display: none; flex-direction: column; gap: 4px; padding: .5rem; }
.nav-toggle-bar { width: 20px; height: 2px; background: var(--c-text-mid); border-radius: 2px; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .primary-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--c-bg-raised); border-bottom: 1px solid var(--c-border);
    padding: var(--sp-md) var(--sp-lg);
  }
  .primary-nav.open { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-link { padding: .65rem 0; }
  .dropdown-menu { position: static; box-shadow: none; border: none; background: transparent; padding-left: var(--sp-md); }
  .nav-dropdown.open .dropdown-menu { display: block; }
}

/* --- HERO ------------------------------------------------ */
.hero {
  padding: var(--sp-2xl) 0 var(--sp-xl);
  background:
    radial-gradient(ellipse 70% 50% at 20% 30%, rgba(240,165,0,.06), transparent),
    radial-gradient(ellipse 60% 60% at 80% 70%, rgba(63,184,175,.04), transparent);
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-2xl); align-items: center;
}
@media (max-width: 768px) {
  .hero { padding: var(--sp-xl) 0; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--sp-lg); }
}
.hero-content h1 {
  font-family: var(--f-display); font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 400; line-height: 1.12; letter-spacing: -.02em;
  color: var(--c-text);
}
.hero-sub {
  margin-top: var(--sp-sm); font-size: 1.05rem; color: var(--c-text-mid);
  max-width: 420px;
}

/* Converter Card */
.converter-card {
  background: var(--c-bg-card); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: var(--sp-lg);
}
.converter-label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: var(--sp-sm); color: var(--c-text); }
.converter-input-wrap { position: relative; }
.converter-input {
  width: 100%; padding: .7rem 2.5rem .7rem .85rem;
  font-family: var(--f-mono); font-size: 1.05rem;
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--r-md);
  color: var(--c-text); outline: none;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.converter-input::placeholder { color: var(--c-text-dim); }
.converter-input:focus { border-color: var(--c-amber); box-shadow: 0 0 0 3px var(--c-amber-glow); }
.converter-clear {
  position: absolute; right: .6rem; top: 50%; transform: translateY(-50%);
  font-size: 1.2rem; color: var(--c-text-dim); padding: .2rem;
}
.converter-clear:hover { color: var(--c-text); }
.converter-hint { font-size: .8rem; color: var(--c-text-dim); margin-top: var(--sp-xs); }
.converter-output {
  margin-top: var(--sp-md); font-family: var(--f-mono); font-size: 1rem;
  color: var(--c-amber); line-height: 1.75; min-height: 1.5em;
  word-break: break-word;
}
.converter-output:empty { display: none; }
.converter-output .phonetic-word {
  display: inline-block; background: var(--c-amber-glow);
  padding: .15rem .5rem; border-radius: var(--r-sm); margin: .15rem .15rem;
}
.converter-output .phonetic-word .letter-highlight {
  font-weight: 700; text-decoration: underline; text-underline-offset: 2px;
}
.converter-output .phonetic-space { display: inline-block; width: 1.5rem; }

/* --- BUTTONS --------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .5rem 1rem; border-radius: var(--r-sm);
  font-size: .8rem; font-weight: 600; letter-spacing: .01em;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform .1s;
}
.btn:active { transform: scale(.97); }
.btn-ghost { border: 1px solid var(--c-border); color: var(--c-text-mid); }
.btn-ghost:hover { background: var(--c-surface); color: var(--c-text); border-color: var(--c-border-lt); }
.btn-sm { padding: .35rem .7rem; font-size: .75rem; }
.btn-copy { background: var(--c-amber); color: var(--c-bg); margin-top: var(--sp-sm); }
.btn-copy:hover { background: #ffc44d; }
.btn-copy.copied { background: var(--c-teal); }
.btn-copy-icon { font-size: .95rem; }

/* --- TABLE SECTION --------------------------------------- */
.table-section { padding: var(--sp-xl) 0; }
.table-section--numbers { padding-top: 0; }
.section-header { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-sm); margin-bottom: var(--sp-lg); }
.section-header h2 { font-family: var(--f-display); font-size: 1.65rem; font-weight: 400; }
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Table */
.alpha-table { font-size: .925rem; }
.alpha-table thead th {
  padding: .65rem .75rem; font-size: .72rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--c-text-dim); border-bottom: 2px solid var(--c-border);
}
.alpha-table tbody tr {
  border-bottom: 1px solid var(--c-border);
  transition: background var(--dur) var(--ease);
}
.alpha-table tbody tr:hover { background: var(--c-amber-glow); }
.alpha-table td { padding: .6rem .75rem; vertical-align: middle; }
.alpha-table .cell-letter {
  font-family: var(--f-mono); font-weight: 500; font-size: 1.05rem;
  color: var(--c-amber); width: 3.5rem;
}
.alpha-table .cell-word { font-weight: 600; color: var(--c-text); font-size: .95rem; }
.alpha-table .cell-pron { color: var(--c-text-mid); font-family: var(--f-mono); font-size: .85rem; }
.alpha-table .cell-morse { font-family: var(--f-mono); color: var(--c-text-dim); font-size: .9rem; letter-spacing: .15em; }
.col-action { width: 3rem; text-align: center; }
.row-copy-btn {
  padding: .25rem .45rem; font-size: .7rem; font-weight: 600;
  color: var(--c-text-dim); border: 1px solid var(--c-border); border-radius: var(--r-sm);
  transition: all var(--dur) var(--ease);
}
.row-copy-btn:hover { color: var(--c-amber); border-color: var(--c-amber); background: var(--c-amber-glow); }
.row-copy-btn.copied { color: var(--c-teal); border-color: var(--c-teal); }

/* Compact table for numbers */
.alpha-table--compact { max-width: 420px; }
.alpha-table--compact .cell-letter { color: var(--c-teal); }

/* --- EXPLORE CARDS --------------------------------------- */
.explore { padding: var(--sp-2xl) 0; }
.explore h2 { font-family: var(--f-display); font-size: 1.65rem; font-weight: 400; margin-bottom: var(--sp-lg); }
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-md);
}
.card {
  background: var(--c-bg-card); border: 1px solid var(--c-border);
  border-radius: var(--r-md); padding: var(--sp-lg);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card:hover { border-color: var(--c-border-lt); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,.25); }
.card-tag {
  display: inline-block; font-size: .65rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .1em; padding: .15rem .5rem; border-radius: 3px;
  margin-bottom: var(--sp-sm);
}
.card--pro .card-tag   { background: var(--c-amber-glow); color: var(--c-amber); }
.card--ipa .card-tag   { background: var(--c-violet-dim); color: var(--c-violet); }
.card--tool .card-tag  { background: var(--c-teal-dim); color: var(--c-teal); }
.card--history .card-tag { background: var(--c-coral-dim); color: var(--c-coral); }
.card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: var(--sp-xs); line-height: 1.35; }
.card h3 a { color: var(--c-text); }
.card h3 a:hover { color: var(--c-amber); }
.card p { font-size: .85rem; color: var(--c-text-mid); line-height: 1.55; }

/* --- FAQ ------------------------------------------------- */
.faq { padding: var(--sp-2xl) 0; }
.faq h2 { font-family: var(--f-display); font-size: 1.65rem; font-weight: 400; margin-bottom: var(--sp-lg); }
.faq-list { max-width: 760px; }
.faq-item {
  border-bottom: 1px solid var(--c-border); padding: var(--sp-md) 0;
}
.faq-item summary {
  cursor: pointer; font-weight: 600; font-size: .95rem; color: var(--c-text);
  list-style: none; display: flex; align-items: center; gap: var(--sp-sm);
  transition: color var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: '+'; display: inline-flex; align-items: center; justify-content: center;
  width: 1.4rem; height: 1.4rem; flex-shrink: 0;
  font-family: var(--f-mono); font-size: .85rem; font-weight: 500;
  border: 1px solid var(--c-border); border-radius: var(--r-sm); color: var(--c-text-dim);
  transition: all var(--dur) var(--ease);
}
.faq-item[open] summary::before { content: '−'; color: var(--c-amber); border-color: var(--c-amber); background: var(--c-amber-glow); }
.faq-item summary:hover { color: var(--c-amber); }
.faq-body { padding: var(--sp-sm) 0 0 2.15rem; }
.faq-body p { font-size: .9rem; color: var(--c-text-mid); line-height: 1.65; }
.faq-body a { text-decoration: underline; text-underline-offset: 2px; }

/* --- FOOTER ---------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--c-border);
  padding: var(--sp-2xl) 0 var(--sp-xl); font-size: .85rem; color: var(--c-text-dim);
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--sp-xl);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-lg); }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-tagline { margin-top: var(--sp-sm); max-width: 280px; line-height: 1.5; }
.footer-nav h4 { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--c-text-dim); margin-bottom: var(--sp-sm); font-weight: 600; }
.footer-nav ul { display: flex; flex-direction: column; gap: var(--sp-xs); }
.footer-nav a { color: var(--c-text-mid); font-size: .85rem; }
.footer-nav a:hover { color: var(--c-amber); }
.footer-bottom { margin-top: var(--sp-xl); padding-top: var(--sp-lg); border-top: 1px solid var(--c-border); font-size: .78rem; color: var(--c-text-dim); }
.footer-bottom a { color: var(--c-text-mid); text-decoration: underline; text-underline-offset: 2px; }

/* --- ENTRANCE ANIMATIONS --------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.hero-content   { animation: fadeIn .5s var(--ease) both; }
.converter-card { animation: fadeIn .5s .1s var(--ease) both; }
/* Remove table row animations to prevent layout shift */
/* .alpha-table tbody tr { animation: fadeUp .3s var(--ease) both; } */

/* --- PRINT STYLESHEET ------------------------------------ */
@media print {
  *, *::before, *::after { background: transparent !important; color: #000 !important; box-shadow: none !important; }
  body { font-size: 11pt; line-height: 1.45; }
  .site-header, .hero, .converter-card, .explore, .faq, .site-footer,
  .col-action, .table-actions, .btn, .nav-toggle { display: none !important; }
  .table-section { padding: 0; }
  .table-section--numbers { page-break-before: avoid; }
  .container { max-width: 100%; padding: 0; }

  /* Show a print header */
  .table-section::before {
    content: 'NATO / ICAO Phonetic Alphabet — phoneticalphabet.org';
    display: block; font-size: 16pt; font-weight: 700; margin-bottom: 10pt;
    border-bottom: 2pt solid #000; padding-bottom: 6pt;
  }
  .section-header h2 { font-size: 13pt; margin-bottom: 6pt; }
  .alpha-table { font-size: 10pt; }
  .alpha-table thead th { border-bottom: 1.5pt solid #000; font-size: 8pt; }
  .alpha-table tbody tr { border-bottom: .5pt solid #999; }
  .alpha-table td { padding: 3pt 6pt; }
  .alpha-table .cell-letter { font-weight: 700; }

  @page { margin: 1.5cm; }
}

/* --- TOAST NOTIFICATION ---------------------------------- */
.toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%) translateY(120%);
  background: var(--c-bg-card); color: var(--c-text); border: 1px solid var(--c-border);
  padding: .55rem 1.1rem; border-radius: var(--r-md);
  font-size: .82rem; font-weight: 500; z-index: 9999;
  box-shadow: 0 10px 40px rgba(0,0,0,.5);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
  opacity: 0; pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; pointer-events: auto; }