/* ============================================================
   RailTime Auth-Seiten (Login/Register)
   Einspaltig: animiertes Logo oben, Formular-Karte darunter.
   Logo + Animation uebernommen aus der Website (Layout 3 /
   Signal Atlas): 3D-Logo mit Orbits, Radar-Scan, Puls-Kern und
   Fade/Scale-Reveal. Farben: Signalrot #e4002b, Anthrazit #080b10.
   ============================================================ */

:root {
    --rt-red: #e4002b;
    --rt-black: #080b10;
    --rt-ink: #151b24;
    --rt-panel: #10161e;
    --rt-paper: #f3f1ec;
    --rt-line: rgba(255, 255, 255, .16);
    --rt-ease: cubic-bezier(.18, .72, .2, 1);
}

/* ---------- Seitenaufbau: eine zentrierte Spalte ---------- */
.rt-auth {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    min-height: 100svh;
    padding: clamp(24px, 4vh, 48px) 16px 48px;
    background:
        radial-gradient(circle at 50% 18%, rgba(228, 0, 43, .16), transparent 52%),
        linear-gradient(160deg, #0b0f15, var(--rt-black) 55%, #05070a);
}

.rt-auth__brand {
    display: grid;
    justify-items: center;
    gap: clamp(2px, .6vw, 8px);
}

.rt-auth__card {
    width: 100%;
    max-width: 440px;
    margin-top: clamp(18px, 3vh, 32px);
}

.rt-auth__status {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 28px;
    color: rgba(255, 255, 255, .75);
    font: 700 .58rem/1 "Space Mono", ui-monospace, monospace;
    letter-spacing: .14em;
}

.rt-auth__status i {
    width: 34px;
    height: 1px;
    background: rgba(255, 255, 255, .35);
}

/* Reveal wie im Layout-3-Hero: Fade + Scale nach kurzem Delay */
.rt-auth-brand__logo {
    display: grid;
    justify-items: center;
    gap: clamp(2px, .6vw, 8px);
    opacity: 0;
    transform: scale(.86);
    transition: opacity 1.15s ease, transform 1.45s cubic-bezier(.16, 1, .3, 1);
}

.rt-auth-brand__logo.is-visible {
    opacity: 1;
    transform: scale(1);
}

/* ---------- Logo-Buehne (aus Signal Atlas / Layout 3) ---------- */
.rt-logo-stage {
    position: relative;
    display: grid;
    width: clamp(190px, 26vw, 260px);
    aspect-ratio: 1;
    place-items: center;
    isolation: isolate;
}

.rt-logo-stage::before,
.rt-logo-stage::after {
    position: absolute;
    z-index: -2;
    border-radius: 50%;
    content: "";
}

/* Pulsierender roter Kern */
.rt-logo-stage::before {
    inset: 20%;
    background: rgba(228, 0, 43, .22);
    box-shadow: 0 0 90px 34px rgba(228, 0, 43, .18);
    animation: rtLogoCore 2.8s ease-in-out infinite;
}

/* Rotierende Skalen-Scheibe */
.rt-logo-stage::after {
    inset: 7%;
    border: 1px solid rgba(255, 255, 255, .1);
    background: repeating-conic-gradient(from 0deg, rgba(255, 255, 255, .24) 0 1deg, transparent 1deg 18deg);
    -webkit-mask: radial-gradient(circle, transparent 67%, #000 68% 70%, transparent 71%);
    mask: radial-gradient(circle, transparent 67%, #000 68% 70%, transparent 71%);
    animation: rtLogoDial 18s linear infinite;
}

.rt-logo-orbit {
    position: absolute;
    z-index: 1;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 50%;
    transform: rotateX(68deg) rotateZ(10deg);
}

.rt-logo-orbit::before {
    position: absolute;
    top: 50%;
    left: -5px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 0 18px 5px rgba(228, 0, 43, .8);
    content: "";
}

.rt-logo-orbit--outer {
    inset: 8%;
    animation: rtLogoOrbit 7s linear infinite;
}

.rt-logo-orbit--inner {
    inset: 19%;
    border-color: rgba(228, 0, 43, .55);
    transform: rotateX(72deg) rotateZ(-28deg);
    animation: rtLogoOrbitReverse 5.5s linear infinite;
}

.rt-logo-scan {
    position: absolute;
    z-index: 5;
    top: 14%;
    bottom: 14%;
    left: 14%;
    width: 1px;
    pointer-events: none;
    background: linear-gradient(transparent, #fff 34%, #e4002b 50%, #fff 66%, transparent);
    box-shadow: 0 0 25px 5px rgba(228, 0, 43, .42);
    opacity: .7;
    animation: rtLogoScan 3.8s cubic-bezier(.65, 0, .35, 1) infinite;
}

/* ---------- 3D-Logo (three.js) mit SVG-Fallback ---------- */
.rt-logo-3d {
    position: relative;
    z-index: 3;
    width: 68%;
    aspect-ratio: 1;
    pointer-events: auto;
    filter: drop-shadow(0 26px 42px rgba(0, 0, 0, .68));
}

.rt-logo-3d::before {
    position: absolute;
    z-index: -1;
    inset: 18%;
    content: '';
    border-radius: 50%;
    background: radial-gradient(circle, rgba(228, 0, 43, .3), rgba(228, 0, 43, 0) 70%);
    filter: blur(18px);
    transform: scale(.88);
    opacity: .62;
    transition: opacity .7s ease, transform .9s cubic-bezier(.16, 1, .3, 1);
}

.rt-logo-3d canvas,
.rt-logo-3d__fallback {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
}

.rt-logo-3d canvas {
    z-index: 2;
    opacity: 0;
    transition: opacity .45s ease;
}

.rt-logo-3d__fallback {
    z-index: 1;
    object-fit: contain;
    opacity: 1;
    transition: opacity .35s ease;
}

.rt-logo-3d.is-ready canvas { opacity: 1; }
.rt-logo-3d.is-ready .rt-logo-3d__fallback { opacity: 0; }

/* ---------- Wortmarke ---------- */
.rt-logo-wordmark {
    position: relative;
    z-index: 3;
    display: block;
    width: clamp(210px, 28vw, 280px);
    max-width: 100%;
    height: auto;
    margin-top: clamp(-26px, -2vw, -14px);
    filter: drop-shadow(0 15px 28px rgba(0, 0, 0, .72));
}

/* ---------- Keyframes ---------- */
@keyframes rtLogoCore {
    50% { opacity: .65; transform: scale(1.18); }
}

@keyframes rtLogoDial {
    to { transform: rotate(360deg); }
}

@keyframes rtLogoOrbit {
    to { transform: rotateX(68deg) rotateZ(370deg); }
}

@keyframes rtLogoOrbitReverse {
    to { transform: rotateX(72deg) rotateZ(-388deg); }
}

@keyframes rtLogoScan {
    0%, 100% { left: 14%; opacity: 0; transform: scaleY(.65); }
    15%, 85% { opacity: .75; }
    50% { left: 86%; opacity: 1; transform: scaleY(1); }
}

/* ============================================================
   Light-Modus: helle Buehne (Standard oben = dunkel).
   Greift, wenn <html> KEINE .dark-Klasse traegt (Theme-Store).
   ============================================================ */
html:not(.dark) .rt-auth {
    background:
        radial-gradient(circle at 50% 16%, rgba(228, 0, 43, .12), transparent 54%),
        linear-gradient(160deg, #f7f9fc, #eef2f7 55%, #e6ebf2);
}

html:not(.dark) .rt-auth__status {
    color: rgba(15, 23, 42, .6);
}

html:not(.dark) .rt-auth__status i {
    background: rgba(15, 23, 42, .22);
}

/* Weisse Wortmarke im Light-Modus einfaerben, damit sie lesbar bleibt */
html:not(.dark) .rt-logo-wordmark {
    filter: brightness(0.12) drop-shadow(0 10px 20px rgba(15, 23, 42, .18));
}

/* Dezente weisse Zierringe/Skala im Light-Modus abdunkeln */
html:not(.dark) .rt-logo-orbit {
    border-color: rgba(15, 23, 42, .18);
}

html:not(.dark) .rt-logo-orbit--inner {
    border-color: rgba(228, 0, 43, .5);
}

html:not(.dark) .rt-logo-stage::after {
    border-color: rgba(15, 23, 42, .12);
    background: repeating-conic-gradient(from 0deg, rgba(15, 23, 42, .14) 0 1deg, transparent 1deg 18deg);
}

html:not(.dark) .rt-logo-3d {
    filter: drop-shadow(0 24px 40px rgba(15, 23, 42, .28));
}

/* ---------- Reduzierte Bewegung ---------- */
@media (prefers-reduced-motion: reduce) {
    .rt-auth-brand__logo { transition: none; opacity: 1; transform: none; }
    .rt-logo-stage::before,
    .rt-logo-stage::after,
    .rt-logo-orbit,
    .rt-logo-scan { animation: none; }
    .rt-logo-scan { display: none; }
}