/* ================================================
   MorseGen — style.css
   Aesthetic: Dark industrial / telegraph terminal
   ================================================ */

/* ── TOKENS ──────────────────────────────────────── */
:root {
  --bg:           #0a0c0f;
  --bg-card:      #111318;
  --bg-panel:     #161a22;
  --border:       #1e2530;
  --border-glow:  #2a3a55;
  --accent:       #e8b84b;
  --accent-dim:   #9a7a2e;
  --accent2:      #4be8b8;
  --text-main:    #e2e8f0;
  --text-muted:   #7a8899;
  --text-dim:     #4a5568;
  --morse-font:   'Share Tech Mono', monospace;
  --body-font:    'Barlow', sans-serif;
  --radius:       8px;
  --radius-lg:    16px;
  --shadow:       0 4px 24px rgba(0,0,0,0.5);
  --glow:         0 0 20px rgba(232,184,75,0.15);
}

/* ── RESET ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--body-font);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: opacity .2s; }
a:hover { opacity: .75; }
button { cursor: pointer; font-family: var(--body-font); }

/* ── CONTAINER ───────────────────────────────────── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── TYPOGRAPHY HELPERS ──────────────────────────── */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--text-main);
  text-align: center;
  margin-bottom: .5rem;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

/* ── BUTTONS ─────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .95rem;
  border: 2px solid transparent;
  transition: all .2s;
}
.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.btn-primary:hover { background: #f5cc6a; opacity: 1; }
.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover { background: var(--accent); color: #000; opacity: 1; }
.btn-outline-dark {
  background: transparent;
  color: var(--text-main);
  border-color: var(--border-glow);
}
.btn-outline-dark:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }

.btn-small {
  background: var(--bg-panel);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 6px;
  font-size: .82rem;
  transition: all .2s;
}
.btn-small:hover { border-color: var(--accent); color: var(--accent); }

/* ── HEADER ──────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,12,15,.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 14px;
  padding-bottom: 14px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
}
.logo-dots {
  font-family: var(--morse-font);
  color: var(--accent);
  font-size: 1.4rem;
  letter-spacing: 2px;
}
.main-nav {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
}
.main-nav a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: .9rem;
  letter-spacing: .02em;
}
.main-nav a:hover { color: var(--accent); opacity: 1; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.4rem;
  margin-left: auto;
}

/* ── HERO ────────────────────────────────────────── */
.hero {
  padding: 80px 0 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(232,184,75,.08), transparent);
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding-bottom: 60px;
}
.hero-eyebrow {
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .75rem;
  font-family: var(--morse-font);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.hero h1 span { color: var(--accent); }
.hero-sub {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  max-width: 500px;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Hero signal visual */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.signal-display {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  box-shadow: var(--glow);
}
.signal-display span {
  font-family: var(--morse-font);
  font-size: 1.6rem;
  color: var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
.signal-display span:nth-child(2) { animation-delay: .3s; }
.signal-display span:nth-child(3) { animation-delay: .6s; }
.signal-display span:nth-child(4) { animation-delay: .9s; }
.signal-display span:nth-child(5) { animation-delay: 1.2s; }
.signal-display span:nth-child(6) { animation-delay: 1.5s; }
@keyframes pulse {
  0%, 100% { opacity: .35; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.2); }
}
.signal-label {
  font-family: var(--morse-font);
  font-size: .9rem;
  color: var(--text-dim);
  letter-spacing: 4px;
}

/* Ticker */
.hero-ticker {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 10px 0;
  font-family: var(--morse-font);
  font-size: 1.1rem;
  color: var(--accent-dim);
  letter-spacing: 6px;
  white-space: nowrap;
  overflow: hidden;
  position: relative;
}
.hero-ticker::before,
.hero-ticker::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 80px;
  z-index: 2;
}
.hero-ticker::before { left: 0; background: linear-gradient(to right, var(--bg-card), transparent); }
.hero-ticker::after  { right: 0; background: linear-gradient(to left, var(--bg-card), transparent); }

/* ── AI BANNER ───────────────────────────────────── */
.ai-banner { padding: 32px 24px; }
.ai-badge {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: linear-gradient(135deg, rgba(75,232,184,.06), rgba(232,184,75,.06));
  border: 1px solid rgba(75,232,184,.25);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}
.ai-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  margin-top: 2px;
}
.ai-badge p { color: var(--text-muted); font-size: .95rem; }
.ai-badge strong { color: var(--accent2); }

/* ── TRANSLATOR SECTION ──────────────────────────── */
.translator-section {
  padding: 70px 0;
}
.translator-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
}

/* Mode tabs */
.mode-tabs {
  display: flex;
  gap: 0;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 4px;
  width: fit-content;
  margin-bottom: 24px;
  border: 1px solid var(--border);
}
.tab {
  padding: 8px 24px;
  border: none;
  background: none;
  color: var(--text-muted);
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 600;
  transition: all .2s;
}
.tab.active {
  background: var(--accent);
  color: #000;
}

/* Translator grid */
.translator-grid {
  display: grid;
  grid-template-columns: 1fr 48px 1fr;
  gap: 0;
  align-items: stretch;
}
.panel { display: flex; flex-direction: column; gap: 8px; }
.panel label {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  font-weight: 600;
}
#inputText {
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-main);
  font-family: var(--body-font);
  font-size: .95rem;
  padding: 14px;
  border-radius: var(--radius);
  resize: vertical;
  transition: border-color .2s;
  line-height: 1.6;
}
#inputText:focus {
  outline: none;
  border-color: var(--accent);
}
.output-box {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  font-family: var(--morse-font);
  font-size: 1.05rem;
  color: var(--accent);
  min-height: 150px;
  word-break: break-all;
  line-height: 2;
  transition: all .2s;
}
.output-box .placeholder-text {
  color: var(--text-dim);
  font-family: var(--body-font);
  font-size: .9rem;
}
.panel-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
#charCount { font-size: .8rem; color: var(--text-dim); margin-right: auto; }

/* Arrow col */
.arrow-col {
  display: flex;
  align-items: center;
  justify-content: center;
}
.swap-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1.3rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
}
.swap-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Blink display */
.blink-display {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
}
.blink-light {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--text-dim);
  border: 2px solid var(--border-glow);
  transition: background .05s, box-shadow .05s;
  flex-shrink: 0;
}
.blink-light.on {
  background: #ffe066;
  box-shadow: 0 0 24px 8px rgba(255,224,102,.5);
}
#blinkStatus { color: var(--text-muted); font-size: .9rem; flex: 1; font-family: var(--morse-font); }

/* Speed controls */
.controls-row {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: .85rem;
  color: var(--text-muted);
}
input[type="range"] {
  accent-color: var(--accent);
  width: 140px;
}

/* ── QUICK PHRASES ───────────────────────────────── */
.quick-section { padding: 70px 0; background: var(--bg-panel); }
.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.quick-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 16px;
  text-align: left;
  transition: all .22s;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.quick-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--glow);
}
.quick-morse {
  font-family: var(--morse-font);
  font-size: .8rem;
  color: var(--accent);
  word-break: break-all;
  line-height: 1.6;
}
.quick-label {
  font-weight: 600;
  font-size: .9rem;
  color: var(--text-main);
}

/* ── ALPHABET CHART ──────────────────────────────── */
.chart-section { padding: 70px 0; }
.chart-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 28px;
}
.chart-tab {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 22px;
  border-radius: 20px;
  font-size: .88rem;
  font-weight: 600;
  transition: all .2s;
}
.chart-tab.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 10px;
}
.chart-cell {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 10px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
}
.chart-cell:hover {
  border-color: var(--accent);
  background: rgba(232,184,75,.06);
}
.chart-char {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
  line-height: 1;
  margin-bottom: 6px;
}
.chart-morse {
  font-family: var(--morse-font);
  font-size: .78rem;
  color: var(--accent);
  word-break: break-all;
}

/* ── LEARN SECTION ───────────────────────────────── */
.learn-section { padding: 70px 0; background: var(--bg-panel); }
.learn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.learn-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: border-color .2s;
}
.learn-card:hover { border-color: var(--border-glow); }
.learn-num {
  font-family: var(--morse-font);
  font-size: 3rem;
  color: var(--border-glow);
  line-height: 1;
  margin-bottom: 12px;
}
.learn-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}
.learn-card p { color: var(--text-muted); font-size: .9rem; }

/* ── HISTORY SECTION ─────────────────────────────── */
.history-section { padding: 80px 0; }
.history-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.history-text h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 1rem;
}
.history-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: .95rem;
}
.history-text cite { font-style: normal; color: var(--accent2); }

/* Telegraph card */
.telegraph-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  box-shadow: var(--glow);
  margin-bottom: 24px;
}
.telegraph-card > div {
  display: inline-block;
  background: var(--accent);
  border-radius: 99px;
  margin: 4px;
  vertical-align: middle;
}
.tele-dot  { width: 14px; height: 14px; }
.tele-dash { width: 36px; height: 14px; }
.tele-line { width: 8px;  height: 14px; background: transparent !important; }
.tele-caption {
  font-family: var(--morse-font);
  font-size: 1.1rem;
  color: var(--accent);
  margin-top: 14px;
  letter-spacing: 6px;
}
.tele-sub { color: var(--text-dim); font-size: .8rem; margin-top: 4px; }

.stat-row { display: flex; gap: 16px; }
.stat {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
}
.stat strong { display: block; font-size: 1.4rem; color: var(--accent); }
.stat span { font-size: .78rem; color: var(--text-muted); }

/* ── FAQ ─────────────────────────────────────────── */
.faq-section { padding: 70px 0; background: var(--bg-panel); }
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .2s;
}
.faq-item:has(.faq-a[open]) { border-color: var(--border-glow); }
.faq-q {
  width: 100%;
  padding: 18px 20px;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: .95rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-q::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform .2s;
}
.faq-q[aria-expanded="true"]::after { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: 0 20px 18px;
}
.faq-a.open { display: block; }
.faq-a p { color: var(--text-muted); font-size: .9rem; }
.faq-a code {
  font-family: var(--morse-font);
  background: var(--bg);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: .88rem;
}

/* ── SITE FOOTER ─────────────────────────────────── */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding-top: 48px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 40px;
}
.footer-brand .logo-dots { color: var(--accent); font-family: var(--morse-font); font-size: 1.2rem; }
.footer-brand p { color: var(--text-muted); font-size: .87rem; margin-top: 8px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links h4 {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.footer-links a { color: var(--text-muted); font-size: .88rem; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 16px;
  font-size: .8rem;
  color: var(--text-dim);
}

/* ── COPY TOAST ──────────────────────────────────── */
.copy-toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--accent);
  color: #000;
  padding: 10px 24px;
  border-radius: 99px;
  font-weight: 700;
  font-size: .9rem;
  opacity: 0;
  transition: all .3s;
  pointer-events: none;
  z-index: 999;
}
.copy-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── RESPONSIVE ──────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .history-grid { grid-template-columns: 1fr; }
  .translator-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }
  .arrow-col { transform: rotate(90deg); height: 48px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 650px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px; left: 0; right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
  }
  .nav-toggle { display: block; }
  .hero { padding-top: 48px; }
  .translator-card { padding: 16px; }
  .footer-inner { grid-template-columns: 1fr; }
  .chart-grid { grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); }
  .stat-row { flex-direction: column; }
}

/* ── BREADCRUMB ─────────────────────────────────── */
.breadcrumb-nav { padding: 12px 24px; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  list-style: none;
  font-size: .82rem;
  color: var(--text-dim);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb [aria-current="page"] { color: var(--accent); }

/* ── VISUALLY HIDDEN (SEO text) ─────────────────── */
.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;
}

/* ── MORSE TREE ─────────────────────────────────── */
.morse-tree-box {
  margin-top: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.morse-tree-box h3 {
  font-size: 1.05rem;
  color: var(--accent);
  margin-bottom: 8px;
}
.morse-tree-box > p {
  color: var(--text-muted);
  font-size: .9rem;
  margin-bottom: 20px;
}
.tree-visual {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}
.tree-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.tree-node {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  font-family: var(--morse-font);
  font-size: .9rem;
  color: var(--text-main);
  min-width: 56px;
  text-align: center;
}
.tree-node.root {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  font-weight: 700;
}
.tree-node.sm {
  padding: 6px 10px;
  font-size: .8rem;
  min-width: 44px;
}
.tree-row-sm { gap: 6px; }
.tree-hint {
  font-size: .78rem;
  color: var(--text-dim);
  margin-top: 8px;
  font-family: var(--morse-font);
}

/* ── LEARNING TABLE ─────────────────────────────── */
.tips-table-wrap {
  margin-top: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  overflow-x: auto;
}
.tips-table-wrap h3 {
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 16px;
}
.tips-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.tips-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--bg-panel);
  color: var(--accent);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  border-bottom: 1px solid var(--border);
}
.tips-table td {
  padding: 10px 14px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.tips-table tr:last-child td { border-bottom: none; }
.tips-table tr:hover td { background: rgba(232,184,75,.04); color: var(--text-main); }

/* ── TELE GAP ────────────────────────────────────── */
.tele-gap { width: 20px; height: 14px; display: inline-block; background: transparent !important; }

/* ── FOOTER CODE ─────────────────────────────────── */
.footer-bottom code {
  font-family: var(--morse-font);
  color: var(--accent);
  font-size: .75rem;
}