/* ==========================================================================
   Preloader — Školící a výcvikové centrum ASKLÉPIOS
   Barevná paleta a font přebrány z hlavního stylu webu (styly/style.css):
   #07598C (modrá), #36383D (tmavá), #F8F8F8 (světlá), font 'Dosis'
   ========================================================================== */

html.has-preloader,
html.has-preloader body { overflow: hidden; height: 100%; }

#preloader {
    position: fixed;
    inset: 0;
    z-index: 100000;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Dosis', sans-serif;
}

/* Dva panely tvoří dohromady jeden souvislý přechod - při odchodu se
   rozjedou do stran jako opona */
.preloader-panel {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    background-image:
        linear-gradient(rgba(4,57,92,.35), rgba(4,57,92,.35)),
        url('../themes/wall.png'),
        linear-gradient(135deg, #0c7bb8 0%, #07598C 45%, #04395C 100%);
    background-repeat: no-repeat, repeat-y, no-repeat;
    background-position: center, top, center;
    background-size: 100% 100%, 200px auto, 200% 100%;
    transition: transform 1.15s cubic-bezier(.77,0,.18,1);
    will-change: transform;
}
.preloader-panel-left  { left: 0;  background-position: center, top, left center; }
.preloader-panel-right { right: 0; background-position: center, top, right center; }

/* Obsah preloaderu */
.preloader-content {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    display: flex;
    flex-flow: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #F8F8F8;
    opacity: 1;
    transform: scale(1) translateY(0);
    transition: opacity .5s ease, transform .6s ease;
}

/* Vodní kruhy šířící se od středu */
.preloader-ripples {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1px;
    height: 1px;
    pointer-events: none;
}
.preloader-ripples span {
    position: absolute;
    top: 0; left: 0;
    width: 160px;
    height: 160px;
    margin: -80px 0 0 -80px;
    border-radius: 50%;
    border: 1px solid rgba(248,248,248,.35);
    opacity: 0;
    animation: preloaderRipple 3.2s cubic-bezier(.2,.7,.4,1) infinite;
}
.preloader-ripples span:nth-child(2) { animation-delay: 1.05s; }
.preloader-ripples span:nth-child(3) { animation-delay: 2.1s; }

@keyframes preloaderRipple {
    0%   { transform: scale(.55); opacity: 0; }
    12%  { opacity: .55; }
    100% { transform: scale(2.6); opacity: 0; }
}

/* Kruhový progress + logo uprostřed */
.preloader-ring-wrap {
    position: relative;
    width: 168px;
    height: 168px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
}

.preloader-ring { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); overflow: visible; }
.preloader-ring-track {
    fill: none;
    stroke: rgba(248,248,248,.18);
    stroke-width: 2.5;
}
.preloader-ring-bar {
    fill: none;
    stroke: #F8F8F8;
    stroke-width: 2.5;
    stroke-linecap: round;
    filter: drop-shadow(0 0 6px rgba(248,248,248,.65));
    transition: stroke-dashoffset .25s linear;
}

/* Tečkovaný prstenec v pomalé neustálé rotaci - jen dekorace pro "akční" pocit */
.preloader-ring-spin {
    position: absolute;
    inset: -14px;
    border-radius: 50%;
    border: 1px dashed rgba(248,248,248,.3);
    animation: preloaderSpin 7s linear infinite;
}
@keyframes preloaderSpin { to { transform: rotate(360deg); } }

.preloader-logo {
    width: 92px;
    height: 62px;
    background: url('../themes/logo.white.png') center no-repeat;
    background-size: contain;
    filter: drop-shadow(0 0 10px rgba(248,248,248,.35));
    animation: preloaderFloat 3.4s ease-in-out infinite;
}
@keyframes preloaderFloat {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}

/* Titulek */
.preloader-text h2 {
    margin: 0;
    font-weight: 300;
    font-size: 1.5em;
    letter-spacing: .5px;
    color: #F8F8F8;
}
.preloader-text h2 span { font-weight: 800; }

.preloader-line {
    width: 0;
    height: 1px;
    margin: 14px auto;
    background: rgba(248,248,248,.5);
    position: relative;
    animation: preloaderLineGrow 1.6s ease .2s forwards;
}
.preloader-line::before,
.preloader-line::after {
    content: '';
    position: absolute;
    top: -2px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #F8F8F8;
}
.preloader-line::before { left: -2px; }
.preloader-line::after  { right: -2px; }
@keyframes preloaderLineGrow { to { width: 90px; } }

.preloader-caption {
    margin: 0;
    font-size: .8em;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: rgba(248,248,248,.75);
}
.preloader-caption .dots i {
    font-style: normal;
    opacity: 0;
    animation: preloaderDots 1.4s ease infinite;
}
.preloader-caption .dots i:nth-child(2) { animation-delay: .2s; }
.preloader-caption .dots i:nth-child(3) { animation-delay: .4s; }
@keyframes preloaderDots {
    0%, 100% { opacity: 0; }
    50%      { opacity: 1; }
}

/* Procenta */
.preloader-percent {
    margin-top: 22px;
    font-size: 2.4em;
    font-weight: 800;
    letter-spacing: 1px;
    font-variant-numeric: tabular-nums;
    color: #F8F8F8;
}
.preloader-percent span { display: inline-block; min-width: 1.6ch; text-align: right; }
.preloader-percent small { font-size: .5em; font-weight: 600; margin-left: 2px; opacity: .8; }

/* Krátký "záblesk" při dosažení 100 % */
.preloader-ring-wrap::after {
    content: '';
    position: absolute;
    inset: -14px;
    border-radius: 50%;
    border: 2px solid #F8F8F8;
    opacity: 0;
    transform: scale(.8);
}
#preloader.preloader--complete .preloader-ring-wrap::after {
    animation: preloaderBurst .6s ease-out;
}
@keyframes preloaderBurst {
    0%   { opacity: .9; transform: scale(.8); }
    100% { opacity: 0;  transform: scale(1.6); }
}

/* Odchod - opona se rozjede, obsah zmizí */
#preloader.preloader--exit .preloader-content {
    opacity: 0;
    transform: scale(1.08) translateY(-10px);
}
#preloader.preloader--exit .preloader-panel-left  { transform: translateX(-100%); }
#preloader.preloader--exit .preloader-panel-right { transform: translateX(100%); }

/* Malé obrazovky */
@media screen and (max-width: 479px) {
    .preloader-ring-wrap { width: 128px; height: 128px; margin-bottom: 20px; }
    .preloader-logo { width: 74px; height: 50px; }
    .preloader-text h2 { font-size: 20px; padding: 0 20px; }
    .preloader-percent { font-size: 2em; }
    .preloader-caption { font-size: 12px; letter-spacing: 2px; }
}

/* Skrytý text pro čtečky obrazovky */
.preloader-sr-only {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* Respekt k omezenému pohybu */
@media (prefers-reduced-motion: reduce) {
    .preloader-panel,
    .preloader-content,
    .preloader-ripples span,
    .preloader-ring-spin,
    .preloader-logo,
    .preloader-line,
    .preloader-caption .dots i {
        animation: none !important;
        transition: opacity .4s ease !important;
    }
    #preloader.preloader--exit .preloader-panel-left,
    #preloader.preloader--exit .preloader-panel-right { transform: none; opacity: 0; transition: opacity .5s ease; }
    .preloader-line { width: 90px; }
}