@import url('fonts.css');

/* SECURE RELAY
   Gestaltungsprinzip: Instrumentenpult, kein Neon-Schaufenster.
   Alles auf dem Schirm ist eine gemessene Tatsache, keine Dekoration. */

:root {
  --void: #05070f;
  --panel: #0a0e1e;
  --panel-2: #0d1226;
  --line: #1b2340;
  --line-bright: #2b3766;
  --dim: #5c6a94;
  --text: #c6d2ee;
  --text-bright: #e8eeff;

  --signal: #3de0d5;   /* gesichert */
  --pulse: #ff3d7f;    /* blockiert */
  --amber: #ffae3d;    /* Warnung */

  --rail: 46px;
  --gap: clamp(20px, 4vw, 40px);
  --mono: 'IBM Plex Mono', ui-monospace, 'Cascadia Mono', Menlo, Consolas, monospace;
  --display: 'Chakra Petch', var(--mono);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--void);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  font-variant-ligatures: none;
  overflow-x: hidden;
}

/* Eine einzige Overlay-Schicht: feines Raster + Scanlines. Mehr nicht. */
body::before {
  content: '';
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;   /* Langform fuer aeltere Safari-Versionen */
  inset: 0;
  pointer-events: none;
  z-index: 100;
  background:
    repeating-linear-gradient(0deg, rgba(61, 224, 213, .022) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, rgba(5, 7, 15, 0) 60%, rgba(5, 7, 15, .55) 100%);
}

::selection { background: var(--signal); color: var(--void); }

/* ---------------------------------------------------------------- Statusleiste */

.rail {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  height: var(--rail);
  padding: 0 var(--gap);
  background: rgba(5, 7, 15, .92);
  -webkit-backdrop-filter: blur(8px);   /* Safari braucht das Praefix */
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.rail__mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .14em;
  color: var(--text-bright);
}

.rail__mark::before {
  content: '';
  width: 3px;
  height: 17px;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
}

.rail__state {
  display: flex;
  align-items: center;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--dim);
}

/* Haarlinien statt Mittelpunkt-Ketten als Trenner. */
.rail__state > * + * {
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.rail__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--signal);
  white-space: nowrap;
}

.rail__link::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
  animation: breathe 2.6s ease-in-out infinite;
}

.rail__link[data-state='pending'] { color: var(--dim); }
.rail__link[data-state='broken'] { color: var(--pulse); }

.rail__clock { font-variant-numeric: tabular-nums; }
.rail__clock:not([data-live]) { display: none; }

@keyframes breathe { 50% { opacity: .35; } }

/* ---------------------------------------------------------------- Rahmen */

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: clamp(32px, 6vw, 68px) var(--gap) 80px;
}

.head {
  margin-bottom: clamp(32px, 5vw, 52px);
  transition: margin-bottom .3s ease;
}

/* Sobald entsperrt ist, tritt die Einleitung zurueck. Das Formular gehoert nach oben. */
body[data-unlocked] .head { margin-bottom: clamp(20px, 3vw, 30px); }
body[data-unlocked] .head h1 { font-size: clamp(24px, 4vw, 34px); }
body[data-unlocked] .head p { display: none; }
body[data-unlocked] .handshake { padding-block: 12px; }

.head h1 {
  margin: 0 0 14px;
  transition: font-size .3s ease;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 62px);
  line-height: .96;
  letter-spacing: -.01em;
  color: var(--text-bright);
}

.head p {
  margin: 0;
  max-width: 54ch;
  color: var(--dim);
}

/* ---------------------------------------------------------------- Handshake */

.handshake {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel) 0%, rgba(10, 14, 30, .4) 100%);
  padding: 20px var(--gap);
  margin-bottom: clamp(28px, 4vw, 44px);
}

.handshake__list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.handshake__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 4px 0;
  color: var(--dim);
  opacity: 0;
  transform: translateX(-6px);
}

.handshake__list li[data-done] {
  opacity: 1;
  transform: none;
  transition: opacity .3s ease, transform .3s ease;
}

.handshake__list li::before {
  content: '·';
  color: var(--line-bright);
  width: 1ch;
  flex: none;
}

.handshake__list li[data-done]::before {
  content: '✓';
  color: var(--signal);
}

.handshake__list li[data-done='fail']::before {
  content: '✕';
  color: var(--pulse);
}

.handshake__list li[data-done='fail'] { color: var(--pulse); }

.handshake__fact {
  margin-left: auto;
  color: var(--text);
  font-size: 12px;
  word-break: break-all;
  text-align: right;
}

/* ---------------------------------------------------------------- Abschnitte */

.stage[hidden] { display: none !important; }

.section__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: .02em;
}

.section__note {
  margin: 0 0 22px;
  color: var(--dim);
  max-width: 60ch;
}

/* ---------------------------------------------------------------- Code-Eingabe */

.code {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.4vw, 10px);
  max-width: 660px;
  margin-bottom: 22px;
}

.code__sep {
  color: var(--line-bright);
  flex: none;
  user-select: none;
}

.code input {
  flex: 1 1 0;
  min-width: 0;
  padding: clamp(12px, 2.4vw, 18px) 2px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text-bright);
  font-family: var(--mono);
  font-size: clamp(13px, 3.1vw, 20px);
  font-weight: 500;
  letter-spacing: .12em;
  text-align: center;
  text-transform: uppercase;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}

.code input::placeholder { color: var(--line-bright); letter-spacing: .12em; }

.code input:hover:not(:disabled) { border-color: var(--line-bright); }

.code input:focus {
  outline: none;
  border-color: var(--signal);
  background: var(--panel-2);
  box-shadow: 0 0 0 1px var(--signal), 0 0 22px -6px var(--signal);
}

.code input:disabled { opacity: .45; cursor: not-allowed; }

.code[data-invalid] input {
  border-color: var(--pulse);
  animation: shudder .32s ease;
}

@keyframes shudder {
  20% { transform: translateX(-4px); }
  60% { transform: translateX(3px); }
}

/* ---------------------------------------------------------------- Schaltflächen */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border: 1px solid var(--signal);
  border-radius: 2px;
  background: transparent;
  color: var(--signal);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color .16s ease, color .16s ease, box-shadow .16s ease;
}

.button:hover:not(:disabled) {
  background: var(--signal);
  color: var(--void);
  box-shadow: 0 0 28px -8px var(--signal);
}

.button:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.button:disabled {
  border-color: var(--line);
  color: var(--dim);
  cursor: not-allowed;
}

.button--ghost { border-color: var(--line-bright); color: var(--dim); }
.button--ghost:hover:not(:disabled) { background: var(--line); color: var(--text); box-shadow: none; }

/* ---------------------------------------------------------------- Meldungen */

.message {
  min-height: 22px;
  font-size: 13px;
  color: var(--dim);
}

.message[data-tone='error'] { color: var(--pulse); }
.message[data-tone='warn'] { color: var(--amber); }
.message[data-tone='good'] { color: var(--signal); }

/* ---------------------------------------------------------------- Verfassen */

.compose {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.compose__side {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  min-width: 0;
}

.compose__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--dim);
}

.compose__count { font-variant-numeric: tabular-nums; }
.compose__count[data-tone='warn'] { color: var(--amber); }

textarea {
  flex: 1;
  min-height: 300px;
  padding: 18px 16px;
  border: 0;
  background: transparent;
  color: var(--text-bright);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  resize: vertical;
}

textarea:focus { outline: none; background: var(--panel-2); }
textarea::placeholder { color: var(--line-bright); }

.cipher {
  flex: 1;
  min-height: 300px;
  margin: 0;
  padding: 18px 16px;
  overflow: hidden;
  color: var(--signal);
  font-size: 11.5px;
  line-height: 1.75;
  word-break: break-all;
  white-space: pre-wrap;
  opacity: .78;
}

.cipher[data-idle] { color: var(--line-bright); opacity: 1; }

.compose__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 22px;
}

/* ---------------------------------------------------------------- Bestätigung */

.receipt {
  border: 1px solid var(--signal);
  background: linear-gradient(180deg, rgba(61, 224, 213, .07), transparent);
  padding: clamp(24px, 4vw, 38px);
}

.receipt h2 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 26px;
  color: var(--text-bright);
}

.receipt p { margin: 0 0 8px; color: var(--dim); max-width: 58ch; }

.receipt__id {
  display: block;
  margin: 18px 0 24px;
  color: var(--signal);
  font-size: 12px;
  word-break: break-all;
}

/* ---------------------------------------------------------------- Fußzeile */

.foot {
  max-width: 1080px;
  margin: 0 auto;
  padding: 26px var(--gap) 60px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  font-size: 11.5px;
  color: var(--dim);
}

.foot span { display: inline-flex; gap: 8px; }
.foot b { font-weight: 500; color: var(--text); }

/* ---------------------------------------------------------------- Schmale Schirme */

@media (max-width: 720px) {
  .compose { grid-template-columns: 1fr; }
  .cipher { min-height: 150px; }
  textarea { min-height: 220px; }
  .rail__state span:not(.rail__link):not(.rail__clock) { display: none; }
  .handshake__list li { flex-wrap: wrap; }
  .handshake__fact {
    flex-basis: 100%;
    margin-left: 0;
    padding-left: calc(1ch + 12px);
    text-align: left;
  }
}

@media (max-width: 420px) {
  .rail { padding: 0 16px; }
  .code { gap: 3px; }
  .code__sep { font-size: 11px; }
  .button { width: 100%; }
  .compose__foot { flex-direction: column; align-items: stretch; }
}

/* ---------------------------------------------------------------- Zurückhaltung */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  body::before { background: none; }
}