/* ============================================================
   HAPP Sub — neon signal theme
   dark base · electric-cyan/blue neon · gradient field · glass
   ============================================================ */
:root {
  --bg-0: #05070f;
  --bg-1: #0a0f1e;
  --surface: rgba(17, 25, 45, 0.62);
  --surface-2: rgba(30, 43, 72, 0.55);
  --surface-solid: #0d1424;
  --line: rgba(96, 150, 255, 0.16);
  --line-strong: rgba(96, 165, 255, 0.34);
  --text: #e9f1ff;
  --muted: #8ca2cb;
  --faint: #5d6f93;
  --accent: #38e1ff;     /* neon cyan */
  --accent-2: #5b8cff;   /* electric blue */
  --accent-3: #9b6bff;   /* violet, used sparingly */
  --accent-dim: rgba(56, 225, 255, 0.5);
  --glow: rgba(56, 225, 255, 0.5);
  --danger: #ff6b8a;
  --notice: #ffd166;
  --ok: #58ffc9;

  /* surfaces that flip per theme */
  --inset: var(--inset);   /* inputs, code & editor boxes */
  --code-text: var(--code-text);             /* text inside code/url boxes */
  --control: var(--control); /* secondary buttons, banners, logout */
  --track: var(--track);  /* unchecked switch track */

  --display: 'Space Grotesk', system-ui, sans-serif;
  --body: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  --radius: 14px;
}

/* the hidden attribute must always win over component display rules */
[hidden] { display: none !important; }

/* ============================================================
   LIGHT THEME — same neon accents on a bright, airy base
   ============================================================ */
html[data-theme="light"] {
  --bg-0: #eef2fb;
  --bg-1: #e7edf8;
  --surface: rgba(255, 255, 255, 0.74);
  --surface-2: rgba(255, 255, 255, 0.58);
  --surface-solid: #ffffff;
  --line: rgba(40, 90, 180, 0.18);
  --line-strong: rgba(40, 90, 180, 0.34);
  --text: #0c1730;
  --muted: #44557c;
  --faint: #7686a8;
  --accent: #0bb0d4;
  --accent-2: #3a6df0;
  --accent-3: #7b4fe0;
  --accent-dim: rgba(11, 176, 212, 0.55);
  --glow: rgba(58, 109, 240, 0.28);
  --danger: #d6395e;
  --notice: #b9791a;
  --ok: #0f9a68;
  --inset: #eef3fb;
  --code-text: #0e3a6b;
  --control: rgba(255, 255, 255, 0.62);
  --track: rgba(120, 140, 180, 0.45);
}
html[data-theme="light"] body::before {
  background:
    radial-gradient(1100px 760px at 10% -12%, rgba(11, 176, 212, 0.16), transparent 60%),
    radial-gradient(1000px 720px at 102% -4%, rgba(58, 109, 240, 0.16), transparent 56%),
    radial-gradient(900px 900px at 52% 118%, rgba(123, 79, 224, 0.10), transparent 55%),
    linear-gradient(180deg, #f2f6fd 0%, #e7edf8 100%);
}
html[data-theme="light"] body::after {
  background-image:
    linear-gradient(rgba(40, 90, 180, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(40, 90, 180, 0.06) 1px, transparent 1px);
}
html[data-theme="light"] .panel { box-shadow: 0 18px 50px rgba(30, 60, 120, 0.13), inset 0 1px 0 rgba(255, 255, 255, 0.6); }
html[data-theme="light"] .modal { box-shadow: 0 30px 80px rgba(30, 60, 120, 0.20), 0 0 40px rgba(11, 176, 212, 0.08); }
html[data-theme="light"] .modal-backdrop { background: rgba(22, 42, 84, 0.34); }
html[data-theme="light"] .slider::before { background: #ffffff; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-0);
  padding: 44px 20px 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  -webkit-font-smoothing: antialiased;
}

/* layered neon gradient field */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1100px 760px at 10% -12%, rgba(56, 225, 255, 0.16), transparent 60%),
    radial-gradient(1000px 720px at 102% -4%, rgba(91, 140, 255, 0.20), transparent 56%),
    radial-gradient(900px 900px at 52% 118%, rgba(155, 107, 255, 0.12), transparent 55%),
    linear-gradient(180deg, #070c18 0%, #05070f 100%);
}
/* faint neon grid, fading toward the edges */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(96, 150, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 150, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(circle at 50% 16%, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at 50% 16%, #000 0%, transparent 72%);
}

.shell { width: 100%; max-width: 640px; }
.center-wrap { width: 100%; max-width: 440px; }

/* ===== masthead / signal beacon ===== */
.masthead { display: flex; align-items: center; gap: 11px; margin-bottom: 12px; }
.beacon {
  width: 11px; height: 11px; border-radius: 50%; flex: none;
  background: var(--accent);
  box-shadow: 0 0 10px var(--glow), 0 0 22px var(--glow);
  position: relative;
}
.beacon::after {
  content: ''; position: absolute; inset: -6px; border-radius: 50%;
  border: 1px solid var(--accent-dim);
  animation: ping 2.4s ease-out infinite;
}
@keyframes ping { 0% { transform: scale(.55); opacity: .9; } 100% { transform: scale(2.4); opacity: 0; } }

.wordmark {
  margin: 0;
  font-family: var(--display);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--muted);
}
.wordmark b {
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.12em;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lede, .login-sub {
  color: var(--muted);
  font-size: 14.5px;
  margin: 0 0 22px;
  max-width: 52ch;
}

/* ===== head row (page title + logout) ===== */
.head-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.logout {
  appearance: none; border: 1px solid var(--line); background: var(--control);
  color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase; border-radius: 9px; padding: 7px 12px; cursor: pointer;
  transition: color .15s, border-color .15s, box-shadow .2s;
}
.logout:hover { color: var(--danger); border-color: rgba(255, 107, 138, 0.5); box-shadow: 0 0 16px rgba(255, 107, 138, 0.2); }

/* ===== panel (glass) ===== */
.panel {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  backdrop-filter: blur(16px) saturate(125%);
  -webkit-backdrop-filter: blur(16px) saturate(125%);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: hidden;
}
.panel::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  opacity: 0.85;
}

/* ===== fields ===== */
.field { margin-bottom: 16px; }
label {
  display: block; margin-bottom: 7px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
  opacity: 0.85;
}
input[type="text"], input[type="password"], textarea {
  width: 100%;
  font-family: var(--body); font-size: 14px;
  color: var(--text);
  background: var(--inset);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 13px;
  transition: border-color .15s, box-shadow .2s, background .2s;
}
input::placeholder, textarea::placeholder { color: var(--faint); }
input[type="text"]:focus, input[type="password"]:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px rgba(56, 225, 255, 0.15), 0 0 20px rgba(56, 225, 255, 0.16);
  background: var(--inset);
}
textarea { resize: vertical; min-height: 92px; line-height: 1.5; }

.hint { color: var(--faint); font-size: 12px; margin: 7px 0 0; }
.hint.bad { color: var(--danger); }

.input-row { display: flex; gap: 8px; }
.input-row input { flex: 1; }

/* ===== buttons ===== */
.go {
  font-family: var(--display); font-weight: 600; font-size: 15px; letter-spacing: 0.01em;
  color: #04121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none; border-radius: 11px;
  padding: 13px 18px; width: 100%; cursor: pointer;
  box-shadow: 0 8px 26px rgba(56, 225, 255, 0.3), inset 0 0 0 1px rgba(255, 255, 255, 0.18);
  transition: transform .12s ease, box-shadow .2s ease, filter .2s;
}
.go:hover { filter: brightness(1.07); box-shadow: 0 10px 32px rgba(56, 225, 255, 0.48); transform: translateY(-1px); }
.go:active { transform: translateY(0); }
.go:disabled { opacity: .55; cursor: default; filter: grayscale(.35); box-shadow: none; }

.login-row { display: flex; gap: 8px; }
.login-row input { flex: 1; }
.login-go { width: auto; white-space: nowrap; padding: 0 20px; }

.btn-ghost {
  appearance: none; white-space: nowrap;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.03em;
  color: var(--accent);
  background: rgba(56, 225, 255, 0.08);
  border: 1px solid var(--accent-dim);
  border-radius: 10px; padding: 0 14px; cursor: pointer;
  transition: background .15s, box-shadow .2s;
}
.btn-ghost:hover { background: rgba(56, 225, 255, 0.16); box-shadow: 0 0 16px rgba(56, 225, 255, 0.25); }

.btn-secondary {
  appearance: none; font-family: var(--mono); font-size: 12.5px;
  color: var(--text); background: var(--control);
  border: 1px solid var(--line); border-radius: 9px; padding: 10px 16px; cursor: pointer;
  transition: border-color .15s, color .15s, box-shadow .2s;
}
.btn-secondary:hover { border-color: var(--accent-dim); color: var(--accent); box-shadow: 0 0 14px rgba(56, 225, 255, 0.18); }

.danger-btn {
  appearance: none; font-family: var(--mono); font-size: 12.5px;
  color: var(--danger); background: rgba(255, 107, 138, 0.1);
  border: 1px solid rgba(255, 107, 138, 0.5); border-radius: 9px; padding: 10px 16px; cursor: pointer;
  transition: background .15s, box-shadow .2s;
}
.danger-btn:hover { background: rgba(255, 107, 138, 0.2); box-shadow: 0 0 16px rgba(255, 107, 138, 0.25); }

.link {
  appearance: none; border: none; background: none; padding: 0; cursor: pointer;
  color: var(--accent); font: inherit;
  border-bottom: 1px solid var(--accent-dim);
}
.link:hover { color: var(--accent-2); }

/* ===== banners ===== */
.banner {
  display: flex; align-items: baseline; gap: 9px;
  border-radius: 11px; padding: 11px 13px; margin-bottom: 16px; font-size: 13.5px;
  border: 1px solid var(--line);
  background: var(--control);
}
.banner .b-tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 2px 8px; border-radius: 999px; flex: none;
}
.banner.danger { border-color: rgba(255, 107, 138, 0.45); background: rgba(255, 107, 138, 0.08); }
.banner.danger .b-tag { background: rgba(255, 107, 138, 0.18); color: var(--danger); }
.banner.notice { border-color: rgba(255, 209, 102, 0.4); background: rgba(255, 209, 102, 0.07); }
.banner.notice .b-tag { background: rgba(255, 209, 102, 0.18); color: var(--notice); }

/* ===== results / link cards ===== */
.results { margin-top: 22px; }
.callsign { font-family: var(--mono); font-size: 13px; color: var(--muted); margin: 0 0 14px; }
.callsign b { color: var(--accent); }

.linkcard {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 15px; margin-bottom: 11px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.linkcard::before {
  content: ''; position: absolute; left: 0; top: 12px; bottom: 12px; width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 10px var(--glow);
}
.lc-head { margin-bottom: 9px; padding-left: 8px; display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.lc-title { font-family: var(--display); font-size: 13.5px; font-weight: 600; letter-spacing: 0.02em; color: var(--text); }
.lc-badge {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.04em;
  color: var(--muted); background: var(--inset);
  border: 1px solid var(--line); border-radius: 999px; padding: 1px 9px;
}
/* subtle variant for the decrypted-link card (informational, not a client link) */
.linkcard.subtle::before { background: linear-gradient(180deg, var(--muted), var(--line)); box-shadow: none; opacity: .6; }
.linkcard.subtle .lc-badge { color: var(--accent); border-color: var(--accent-dim); }
.lc-url { display: flex; gap: 8px; align-items: stretch; padding-left: 8px; }
.lc-url code {
  flex: 1; min-width: 0;
  font-family: var(--mono); font-size: 12px; color: var(--code-text);
  background: var(--inset); border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 11px;
  overflow-x: auto; white-space: nowrap;
}
.copy {
  flex: none; cursor: pointer;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.04em;
  color: var(--accent); background: rgba(56, 225, 255, 0.08);
  border: 1px solid var(--accent-dim); border-radius: 8px; padding: 0 14px;
  transition: background .15s, color .15s, box-shadow .2s;
}
.copy:hover { background: rgba(56, 225, 255, 0.16); box-shadow: 0 0 14px rgba(56, 225, 255, 0.25); }
.copy.done { color: var(--ok); border-color: rgba(88, 255, 201, 0.5); background: rgba(88, 255, 201, 0.12); }
.lc-tip { color: var(--faint); font-size: 12px; margin: 9px 0 0; padding-left: 8px; }

/* ===== toggles ===== */
.toggle-row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: var(--surface);
  border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; margin-bottom: 10px;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.toggle-title { font-family: var(--display); font-weight: 600; font-size: 14.5px; color: var(--text); }
.toggle-sub { color: var(--faint); font-size: 12px; margin-top: 3px; max-width: 46ch; }

.switch { position: relative; display: inline-block; width: 48px; height: 27px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; inset: 0; cursor: pointer;
  background: var(--track); border: 1px solid var(--line);
  border-radius: 999px; transition: .22s;
}
.slider::before {
  content: ''; position: absolute; height: 19px; width: 19px; left: 3px; top: 3px;
  background: #cfe0ff; border-radius: 50%; transition: .22s; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
}
.switch input:checked + .slider {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; box-shadow: 0 0 18px rgba(56, 225, 255, 0.45);
}
.switch input:checked + .slider::before { transform: translateX(21px); background: #04121a; }
.switch input:focus-visible + .slider { box-shadow: 0 0 0 3px rgba(56, 225, 255, 0.3); }

/* ===== section titles ===== */
.section-title {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--faint); margin: 26px 0 12px;
  display: flex; align-items: center; gap: 10px;
}
.section-title::after { content: ''; flex: 1; height: 1px; background: var(--line); }

/* ===== subscription formats (admin, read-only reference) ===== */
.fmt-list { list-style: none; margin: 0; padding: 0; }
.fmt-item {
  display: grid; grid-template-columns: 130px 1fr; gap: 12px; align-items: baseline;
  padding: 9px 0; border-bottom: 1px solid var(--line);
}
.fmt-item:last-child { border-bottom: none; }
.fmt-name {
  font-family: var(--display); font-size: 13.5px; font-weight: 600; color: var(--accent);
}
.fmt-desc { font-size: 13px; line-height: 1.5; color: var(--muted); }
.fmt-note { font-size: 12px; color: var(--faint); margin: 10px 0 0; }
@media (max-width: 460px) {
  .fmt-item { grid-template-columns: 1fr; gap: 2px; }
}

/* ===== device / config rows ===== */
.dev-list { display: flex; flex-direction: column; gap: 9px; }
.dev-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 11px;
  padding: 14px 16px; cursor: pointer; text-align: left; width: 100%;
  font: inherit; color: var(--text);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: border-color .15s, box-shadow .2s, transform .12s;
}
.dev-row:hover { border-color: var(--accent-dim); box-shadow: 0 0 22px rgba(56, 225, 255, 0.14); transform: translateY(-1px); }
.dev-row .dn { font-family: var(--display); font-weight: 600; font-size: 14.5px; letter-spacing: 0.01em; }
.dev-row .meta { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.dev-empty { color: var(--faint); font-size: 14px; padding: 8px 2px; }

.badge-custom {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent-dim); border-radius: 999px;
  padding: 2px 8px; margin-right: 6px;
  box-shadow: 0 0 12px rgba(56, 225, 255, 0.2);
}

/* ===== modals ===== */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(4, 7, 15, 0.72);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 44px 16px; overflow-y: auto;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  position: relative; width: 100%; max-width: 580px;
  background: var(--surface-solid);
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 40px rgba(56, 225, 255, 0.1);
}
.modal::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
}
.modal h3 { margin: 0 0 16px; font-family: var(--display); font-size: 16px; font-weight: 600; letter-spacing: 0.01em; }
.modal h3 .x {
  float: right; cursor: pointer; color: var(--muted); border: none; background: none;
  font-size: 20px; line-height: 1; padding: 0 2px;
}
.modal h3 .x:hover { color: var(--danger); }

.kv { margin-bottom: 13px; }
.kv .k {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--faint); margin-bottom: 5px;
}
.kv .v {
  font-family: var(--mono); font-size: 12.5px; color: var(--code-text);
  background: var(--inset); border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 11px; overflow-x: auto; white-space: nowrap;
}
.modal-actions { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; }

/* ===== template / extra editor ===== */
.editor-note { color: var(--faint); font-size: 12.5px; margin: 0 0 12px; line-height: 1.55; }
.editor textarea {
  width: 100%; min-height: 340px; resize: vertical;
  font-family: var(--mono); font-size: 12.5px; line-height: 1.55;
  background: var(--inset); color: var(--code-text);
  border: 1px solid var(--line); border-radius: 10px; padding: 13px;
  white-space: pre; overflow-wrap: normal; overflow-x: auto;
}
.editor textarea:focus { outline: none; border-color: var(--accent-dim); box-shadow: 0 0 0 3px rgba(56, 225, 255, 0.15); }
.editor-actions { display: flex; gap: 8px; margin-top: 12px; align-items: center; flex-wrap: wrap; }
.editor-status { font-size: 12.5px; color: var(--faint); margin-left: auto; font-family: var(--mono); }
.editor-status.ok { color: var(--ok); }
.editor-status.bad { color: var(--danger); }

/* ===== footer ===== */
.foot {
  margin-top: 26px; color: var(--faint); font-size: 11.5px; text-align: center;
  font-family: var(--mono); letter-spacing: 0.05em;
}

/* ===== responsive ===== */
@media (max-width: 480px) {
  body { padding: 26px 14px 48px; }
  .lc-url { flex-direction: column; }
  .copy { padding: 9px; }
  .input-row { flex-direction: column; }
  .btn-ghost { padding: 10px; }
  .toggle-row { gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .beacon::after { animation: none; }
  * { transition: none !important; }
}

/* ===== theme toggle ===== */
.head-actions { display: flex; align-items: center; gap: 8px; }
.theme-toggle {
  appearance: none; flex: none;
  width: 38px; height: 38px; border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--line);
  color: var(--accent); cursor: pointer;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: border-color .15s, box-shadow .2s, transform .12s, color .15s;
}
.theme-toggle:hover { border-color: var(--accent-dim); box-shadow: 0 0 18px var(--glow); transform: translateY(-1px); }
.theme-toggle svg { width: 18px; height: 18px; display: block; }
.theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun { display: block; }
html[data-theme="light"] .theme-toggle .icon-moon { display: block; }
html[data-theme="light"] .theme-toggle .icon-sun { display: none; }