/* ═══════════════════════════════════════════════════════════════
   image-decoder.css — OnlineMorseCode Image Decoder Page (FIXED)
   Key fixes vs original:
    • Mobile-only nav rules properly scoped (were leaking to desktop,
      hiding the main nav and collapsing the footer at all widths)
    • Closed broken @keyframes pulse{} block (was missing trailing })
    • Removed duplicated declaration blocks
    • Larger tap targets on view-toggle buttons (≥44px on mobile)
    • Range inputs no longer inherit padding from generic input rule
    • Added :focus-visible outlines for keyboard users
    • Reduced-motion support
═══════════════════════════════════════════════════════════════ */

/* ── DESIGN 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); }

/* Focus styles for keyboard nav */
:focus-visible {
  outline:2px solid var(--accent2);
  outline-offset:2px;
  border-radius:4px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration:.01ms !important; animation-duration:.01ms !important; scroll-behavior:auto !important; }
}

/* ── SKIP LINK ── */
.skip-link { position:absolute; top:-100px; left:12px; background:var(--accent); color:#000; padding:10px 18px; border-radius:0 0 8px 8px; font-weight:700; font-size:.9rem; z-index:9999; text-decoration:none; transition:top .15s; }
.skip-link:focus { top:0; }

/* ── LAYOUT ── */
.container { max-width:1140px; margin:0 auto; padding:0 24px; }
.section-title { font-size:clamp(1.6rem,3vw,2.4rem); font-weight:700; text-align:center; margin-bottom:.5rem; color:var(--text-main); }
.section-sub { text-align:center; color:var(--text-muted); max-width:600px; margin:0 auto 2.5rem; }

/* ── HEADER / NAV (DESKTOP) ── */
.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:14px 0; position:relative; }

.logo { display:flex; align-items:center; gap:8px; font-size:1.25rem; font-weight:700; color:var(--text-main); }
.logo-dots { font-family:var(--morse-font); color:var(--accent); font-size:1.4rem; letter-spacing:2px; }

.main-nav { display:flex; align-items:center; gap:2px; margin-left:auto; flex-wrap:nowrap; }
.main-nav > a, .nav-group-btn { font-size:.88rem; padding:7px 12px; border-radius:8px; transition:.18s; line-height:1; color:var(--text-muted); font-weight:500; white-space:nowrap; min-height:44px; display:inline-flex; align-items:center; }
.main-nav > a:hover, .nav-group-btn:hover { background:var(--bg-card); color:var(--text-main); opacity:1; }

.nav-group { position:relative; }
.nav-group-btn { border:none; background:transparent; cursor:pointer; display:flex; align-items:center; gap:5px; font-family:var(--body-font); }
.nav-arrow { font-size:.55rem; opacity:.5; display:inline-block; transition:transform .2s; }
.nav-group:hover .nav-arrow { transform:rotate(180deg); }

.nav-dropdown {
  visibility:hidden; opacity:0; pointer-events:none;
  position:absolute; top:calc(100% + 6px); right:0;
  background:var(--bg-card); border:1px solid var(--border); border-radius:12px;
  padding:6px; width:max-content; min-width:180px; max-width:240px;
  box-shadow:0 20px 60px rgba(0,0,0,.6); z-index:9999;
  transition:opacity .15s, visibility .15s, transform .15s;
  transform:translateY(-4px);
}
.nav-group:hover .nav-dropdown,
.nav-group:focus-within .nav-dropdown {
  visibility:visible; opacity:1; pointer-events:auto; transform:translateY(0);
}
.nav-dropdown a { display:block; padding:8px 12px; border-radius:7px; color:var(--text-muted); font-size:.84rem; font-weight:500; transition:.12s; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.nav-dropdown a:hover { background:var(--bg-panel); color:var(--text-main); opacity:1; }
.nav-divider { height:1px; background:var(--border); margin:5px 0; }
.nav-dropdown-label { font-size:.65rem; color:var(--text-dim); padding:5px 10px 2px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; }

.nav-toggle { display:none; background:transparent; border:1px solid var(--border); color:var(--text-main); font-size:1rem; margin-left:auto; padding:7px 12px; border-radius:8px; cursor:pointer; transition:.2s; }
.nav-toggle:hover { border-color:var(--accent); color:var(--accent); }

/* ── BREADCRUMB ── */
.bc-nav { background:var(--bg-card); padding:10px 0; border-bottom:1px solid var(--border); }
.bc-wrap { font-size:.8rem; font-family:var(--morse-font); color:var(--text-dim); }
.bc-a { color:var(--text-dim); }
.bc-a:hover { color:var(--accent); }
.bc-chevron { margin:0 8px; }
.bc-current-accent { color:var(--accent); }

/* ── HERO ── */
.decoder-hero { background:linear-gradient(135deg,#0a0c0f 0%,#0c1218 50%,#0a0c0f 100%); border-bottom:1px solid var(--border); padding:56px 0 40px; text-align:center; }
.decoder-hero .hero-eyebrow { font-family:var(--morse-font); color:var(--accent2); font-size:.85rem; letter-spacing:.2em; text-transform:uppercase; margin-bottom:12px; min-height:1.2em; }
.decoder-hero h1 { font-size:clamp(2rem,4vw,3rem); font-weight:700; line-height:1.15; margin-bottom:14px; }
.decoder-hero h1 span { color:var(--accent); }
.decoder-hero p { color:var(--text-muted); max-width:580px; margin:0 auto; }

/* ── DECODER WRAP ── */
.decoder-wrap { max-width:860px; margin:0 auto; padding:48px 24px 64px; }

/* ── UPLOAD ZONE ── */
.img-upload-zone {
  border:2px dashed var(--border-glow); border-radius:var(--radius-lg);
  padding:52px 24px; text-align:center; cursor:pointer;
  background:var(--bg-card); position:relative; overflow:hidden;
  min-height:220px; transition:border-color .25s, background .25s;
}
.img-upload-zone:hover, .img-upload-zone.drag-over, .img-upload-zone:focus-visible {
  border-color:var(--accent);
  background:rgba(232,184,75,.04);
}
.img-upload-zone input[type=file] { position:absolute; inset:0; opacity:0; cursor:pointer; width:100%; height:100%; }
.upload-icon { font-size:3rem; margin-bottom:14px; }
.img-upload-zone h3 { font-size:1.2rem; margin-bottom:8px; color:var(--text-main); }
.img-upload-zone p { color:var(--text-muted); font-size:.9rem; }
.file-types { margin-top:14px; display:flex; gap:8px; justify-content:center; flex-wrap:wrap; }
.file-badge { background:var(--bg-panel); border:1px solid var(--border); color:var(--text-dim); font-family:var(--morse-font); font-size:.75rem; padding:3px 10px; border-radius:20px; }

.camera-btn {
  display:inline-flex; align-items:center; gap:8px;
  margin:14px auto 0; padding:10px 22px;
  border:1px solid var(--border-glow); background:var(--bg-panel);
  color:var(--text-muted); border-radius:var(--radius);
  font-size:.9rem; cursor:pointer; transition:all .2s;
  position:relative; z-index:1; /* sit above the absolute file input */
}
.camera-btn:hover, .camera-btn:focus-visible { border-color:var(--accent2); color:var(--accent2); }

/* ── PREVIEW ── */
.img-preview-wrap { display:none; background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-lg); overflow:hidden; margin:20px 0; }
.img-preview-wrap.visible { display:block; }
.img-preview-header { padding:12px 18px; border-bottom:1px solid var(--border); display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; }
.img-preview-header span { font-size:.85rem; color:var(--text-muted); font-family:var(--morse-font); word-break:break-all; }
.img-change-btn { padding:6px 14px; border:1px solid var(--border); background:var(--bg-panel); color:var(--text-muted); border-radius:var(--radius); font-size:.8rem; cursor:pointer; transition:all .2s; }
.img-change-btn:hover, .img-change-btn:focus-visible { border-color:var(--accent2); color:var(--accent2); }
.img-canvas-wrap { padding:16px; position:relative; text-align:center; }
canvas#imgCanvas { max-width:100%; display:block; margin:0 auto; border-radius:var(--radius); background:#000; min-height:1px; }
canvas#processCanvas { display:none; }

/* ── VIEW TOGGLES ── */
.img-controls { display:flex; gap:8px; flex-wrap:wrap; padding:12px 16px; border-top:1px solid var(--border); background:var(--bg-panel); align-items:center; }
.img-ctrl-btn { padding:10px 16px; border:1px solid var(--border); background:var(--bg-card); color:var(--text-muted); border-radius:20px; font-size:.82rem; cursor:pointer; transition:all .2s; min-height:40px; }
.img-ctrl-btn:hover { border-color:var(--accent); color:var(--accent); }
.img-ctrl-btn.active { border-color:var(--accent2); color:var(--accent2); background:rgba(75,232,184,.08); }

/* ── SETTINGS ── */
.decoder-settings { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-lg); padding:22px 24px; margin:20px 0; }
.settings-title { font-size:.85rem; font-weight:700; color:var(--text-dim); text-transform:uppercase; letter-spacing:.12em; margin-bottom:16px; }
.settings-grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.setting-item label { display:block; font-size:.82rem; color:var(--text-muted); margin-bottom:6px; }
.setting-item select { width:100%; background:var(--bg-panel); border:1px solid var(--border); color:var(--text-main); border-radius:var(--radius); padding:10px 12px; font-size:.9rem; font-family:var(--body-font); }
.setting-item select:focus { outline:none; border-color:var(--accent); }
.setting-item input[type=range] { width:100%; -webkit-appearance:none; appearance:none; background:transparent; padding:8px 0; cursor:pointer; }
.setting-item input[type=range]::-webkit-slider-runnable-track { height:6px; background:var(--bg-panel); border:1px solid var(--border); border-radius:20px; }
.setting-item input[type=range]::-moz-range-track { height:6px; background:var(--bg-panel); border:1px solid var(--border); border-radius:20px; }
.setting-item input[type=range]::-webkit-slider-thumb { -webkit-appearance:none; appearance:none; width:18px; height:18px; border-radius:50%; background:var(--accent); border:2px solid var(--bg); margin-top:-7px; cursor:pointer; }
.setting-item input[type=range]::-moz-range-thumb { width:18px; height:18px; border-radius:50%; background:var(--accent); border:2px solid var(--bg); cursor:pointer; }
.setting-val { font-family:var(--morse-font); color:var(--accent); font-size:.8rem; text-align:right; margin-top:4px; }

/* ── DECODE BUTTON ── */
.decode-btn-wrap { text-align:center; margin:24px 0; }
.decode-btn { padding:16px 48px; background:var(--accent); color:#000; border:none; border-radius:var(--radius); font-size:1.05rem; font-weight:700; cursor:pointer; transition:all .2s; min-height:56px; }
.decode-btn:hover:not(:disabled) { background:#f5cc6a; transform:translateY(-1px); box-shadow:var(--glow); }
.decode-btn:disabled { opacity:.4; cursor:not-allowed; transform:none; }

/* ── PROGRESS ── */
.decode-progress { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius); padding:20px; margin:16px 0; display:none; }
.decode-progress.visible { display:block; }
.progress-label { font-size:.85rem; color:var(--text-muted); margin-bottom:10px; display:flex; justify-content:space-between; gap:8px; }
.progress-bar-bg { background:var(--bg-panel); border-radius:20px; height:8px; overflow:hidden; }
.progress-bar-fill { height:100%; background:linear-gradient(90deg,var(--accent2),var(--accent)); border-radius:20px; width:0%; transition:width .3s; }
.progress-steps { display:flex; gap:6px; margin-top:14px; flex-wrap:wrap; }
.prog-step { font-size:.75rem; padding:5px 10px; border-radius:20px; background:var(--bg-panel); border:1px solid var(--border); color:var(--text-dim); transition:all .3s; }
.prog-step.active { border-color:var(--accent2); color:var(--accent2); }
.prog-step.done { border-color:var(--accent); color:var(--accent); }

/* ── RESULTS ── */
.result-box { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-lg); padding:28px; margin:20px 0; display:none; }
.result-box.visible { display:block; }
.result-label { font-size:.8rem; color:var(--text-dim); text-transform:uppercase; letter-spacing:.12em; margin-bottom:10px; }
.result-morse { font-family:var(--morse-font); font-size:1.1rem; color:var(--accent); word-break:break-all; line-height:1.8; padding:14px; background:var(--bg-panel); border-radius:var(--radius); margin-bottom:16px; min-height:48px; letter-spacing:.08em; }
.result-text { font-size:1.5rem; font-weight:700; color:var(--text-main); font-family:var(--morse-font); letter-spacing:.1em; padding:16px; background:var(--bg-panel); border:1px solid var(--border-glow); border-radius:var(--radius); word-break:break-word; min-height:56px; }
.result-actions { display:flex; gap:10px; margin-top:16px; flex-wrap:wrap; }
.result-act-btn { padding:10px 18px; border-radius:var(--radius); border:1px solid var(--border); background:var(--bg-panel); color:var(--text-muted); font-size:.85rem; font-weight:600; cursor:pointer; transition:all .2s; min-height:42px; }
.result-act-btn:hover, .result-act-btn:focus-visible { border-color:var(--accent2); color:var(--accent2); }

/* ── DETECTED SYMBOL CHIPS ── */
.symbol-grid { display:flex; flex-wrap:wrap; gap:8px; margin:16px 0; }
.sym-chip { background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); padding:8px 12px; text-align:center; min-width:56px; }
.sym-chip .sc-morse { font-family:var(--morse-font); font-size:.75rem; color:var(--accent); display:block; }
.sym-chip .sc-letter { font-size:1.1rem; font-weight:700; color:var(--text-main); display:block; }

/* ── ERROR / TIP BOXES ── */
.error-box { background:rgba(232,83,75,.08); border:1px solid rgba(232,83,75,.3); border-radius:var(--radius); padding:14px 18px; color:#f08080; font-size:.9rem; margin:16px 0; display:none; }
.error-box.visible { display:block; }
.tip-box { background:rgba(75,232,184,.05); border:1px solid rgba(75,232,184,.2); border-radius:var(--radius); padding:14px 18px; color:var(--accent2); font-size:.88rem; margin:16px 0; }
.tip-box strong { color:var(--accent2); }
.tip-box code { background:rgba(0,0,0,.3); padding:1px 6px; border-radius:4px; }

/* ── EMPTY STATE ── */
.empty-state { text-align:center; padding:40px; color:var(--text-muted); }
.empty-state-icon { font-size:3rem; margin-bottom:12px; opacity:.5; }

/* ── HOW IT WORKS ── */
.how-section { background:var(--bg-panel); border-top:1px solid var(--border); padding:56px 0; }
.how-steps { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:24px; margin-top:32px; }
.how-step { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-lg); padding:28px 22px; text-align:center; }
.how-num { width:44px; height:44px; border-radius:50%; background:rgba(232,184,75,.12); border:1px solid var(--accent-dim); color:var(--accent); font-family:var(--morse-font); font-size:1.1rem; display:flex; align-items:center; justify-content:center; margin:0 auto 14px; }
.how-step h3 { font-size:1rem; margin-bottom:8px; }
.how-step p { color:var(--text-muted); font-size:.88rem; }

/* ── FORMATS ── */
.formats-section { padding:48px 0; }
.formats-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:20px; margin-top:28px; }
.format-card { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-lg); padding:22px; }
.format-icon { font-size:2rem; margin-bottom:10px; }
.format-card h3 { font-size:1rem; margin-bottom:6px; }
.format-card p { color:var(--text-muted); font-size:.85rem; }

/* ── TIPS GRID ── */
.tips-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:16px; }
.tip-card { background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); padding:18px; }
.tip-card-icon { font-size:1.4rem; margin-bottom:8px; }
.tip-card h3 { font-size:.95rem; font-weight:700; margin-bottom:6px; color:var(--text-main); }
.tip-card p { color:var(--text-muted); font-size:.85rem; line-height:1.6; }

/* ── ARTICLE ── */
.article-section { max-width:860px; margin:0 auto; padding:0 24px 40px; }
.article-h2 { font-size:1.25rem; font-weight:700; margin:32px 0 12px; padding-bottom:8px; border-bottom:1px solid var(--border); }
.article-p { color:var(--text-muted); line-height:1.85; margin-bottom:12px; }
.faq-item { border-bottom:1px solid var(--border); padding:14px 0; }
.faq-item:last-child { border-bottom:none; padding-bottom:0; }
.faq-q { font-size:.95rem; font-weight:600; color:var(--text-main); margin-bottom:6px; }
.faq-a { color:var(--text-muted); font-size:.88rem; line-height:1.7; }

/* ── FOOTER ── */
.site-footer { background:var(--bg-card); padding-top:48px; border-top:1px solid var(--border); }
.footer-inner { display:grid; grid-template-columns:2fr 1fr 1fr; gap:3rem; padding-bottom:40px; }
.footer-brand .logo-dots { color:var(--accent); 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 { text-align:center; padding:16px; font-size:.8rem; color:var(--text-dim); border-top:1px solid var(--border); }
.footer-bottom code { color:var(--accent); font-size:.75rem; font-family:var(--morse-font); }

/* ── ANIMATIONS ── */
@keyframes pulse {
  0%, 100% { opacity:.35; transform:scale(1); }
  50%      { opacity:1;   transform:scale(1.2); }
}
@keyframes blink { 50% { opacity:0; } }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════ */

@media (max-width:900px) {
  .nav-toggle { display:flex; align-items:center; }
  .main-nav { display:none; }
  .main-nav.open {
    display:flex; flex-direction:column;
    position:absolute; top:100%; left:0; right:0;
    background:var(--bg-card); border-bottom:1px solid var(--border);
    padding:6px 0; z-index:9999;
    box-shadow:0 8px 32px rgba(0,0,0,.5);
    max-height:85vh; overflow-y:auto;
  }
  .main-nav > a, .nav-group { width:100%; }
  .main-nav > a {
    padding:13px 24px; border-radius:0;
    font-size:.95rem; border-bottom:1px solid var(--border);
    white-space:normal;
  }
  .main-nav > a:last-of-type { border-bottom:none; }
  .nav-group { border-bottom:1px solid var(--border); }
  .nav-group-btn {
    width:100%; padding:13px 24px; border-radius:0;
    font-size:.95rem; justify-content:space-between;
  }
  /* Disable hover-open on touch; rely on .open class via JS */
  .nav-group:hover .nav-dropdown {
    visibility:hidden; opacity:0; pointer-events:none; transform:none;
  }
  .nav-group:hover .nav-arrow { transform:none; }
  .nav-group.open .nav-dropdown {
    display:block; visibility:visible; opacity:1;
    pointer-events:auto; transform:none;
    position:static; box-shadow:none; border:none; border-radius:0;
    background:var(--bg-panel); padding:4px 0;
    width:100%; max-width:100%; min-width:auto;
    transition:none;
  }
  .nav-group.open .nav-arrow { transform:rotate(180deg); }
  .nav-group.open .nav-group-btn { color:var(--accent); background:rgba(232,184,75,.08); }
  .nav-dropdown a {
    display:block; width:100%;
    padding:11px 48px; border-radius:0;
    font-size:.9rem; white-space:normal;
    overflow:visible; text-overflow:unset;
  }
  .nav-dropdown-label { padding:8px 48px 2px; }
  .nav-divider { margin:4px 24px; }

  .footer-inner { grid-template-columns:1fr 1fr; }
  .footer-brand { grid-column:1 / -1; }
}

@media (max-width:650px) {
  .footer-inner { grid-template-columns:1fr; }
}

@media (max-width:520px) {
  .settings-grid { grid-template-columns:1fr; }
  .decoder-wrap { padding:32px 16px 48px; }
  .img-upload-zone { padding:36px 16px; }
  .upload-icon { font-size:2.4rem; }
  .img-upload-zone h3 { font-size:1.05rem; }
  .result-text { font-size:1.2rem; }
  .container { padding:0 16px; }
}