/* ==========================================================================
   Preloader — Projekčný ateliér KockanDesign
   Vizuálne nadväzuje na hlavný dizajn webu (styly/style.css):
   farby #E20000 / #8f1717 / #000 / #f6f6f6, font Ubuntu, kruhové akcenty,
   tenké deliace linky a jemné 0.35s prechody.
   ========================================================================== */

html.preloader-active,
html.preloader-active body {
    overflow: hidden !important;
    height: 100%;
}

#preloader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0a0a0a;
    font-family: 'Ubuntu', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* Curtain panel — wipes away to one side on exit, no centre seam */
.preloader-panel {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, #171717 0%, #060606 100%);
    box-shadow: 3px 0 12px rgba(226,0,0,.35);
    transform: translateX(0);
    transition: transform 0.9s cubic-bezier(.77,0,.18,1);
    will-change: transform;
}

#preloader.is-leaving .preloader-panel { transform: translateX(-101%); }

/* Faint watermark, mirrors .header-navigace-popisek treatment */
.preloader-watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(60px, 14vw, 180px);
    font-weight: 700;
    letter-spacing: 4px;
    color: rgba(245,245,245,.035);
    white-space: nowrap;
    pointer-events: none;
    user-select: none;
}

/* Slow rotating blueprint-style ring behind the logo */
.preloader-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    width: clamp(220px, 32vw, 420px);
    height: clamp(220px, 32vw, 420px);
    transform: translate(-50%, -50%);
    border: 1px dashed rgba(226,0,0,.25);
    border-radius: 50%;
    animation: preloader-spin 26s linear infinite;
    pointer-events: none;
}
.preloader-ring::before {
    content: "";
    position: absolute;
    inset: 22px;
    border: 1px solid rgba(245,245,245,.06);
    border-radius: 50%;
}
@keyframes preloader-spin {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.preloader-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60vmax;
    height: 60vmax;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(226,0,0,.16) 0%, rgba(226,0,0,0) 60%);
    animation: preloader-breathe 3.6s ease-in-out infinite;
    pointer-events: none;
}
@keyframes preloader-breathe {
    0%, 100% { opacity: .55; transform: translate(-50%, -50%) scale(.92); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
}

.preloader-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: opacity 0.5s ease, transform 0.5s ease;
}
#preloader.is-leaving .preloader-content {
    opacity: 0;
    transform: scale(.94);
}

/* Logo mark */
.preloader-logo {
    width: 68px;
    height: 74px;
    margin: 0 0 22px 0;
    opacity: 0;
    transform: scale(.8);
    animation: preloader-logo-in .6s cubic-bezier(.34,1.56,.64,1) .1s forwards;
}
@keyframes preloader-logo-in {
    to { opacity: 1; transform: scale(1); }
}
.preloader-logo svg { width: 100%; height: 100%; overflow: visible; }
#preloader-logo-path {
    stroke: #E20000;
    stroke-width: 2.4;
    fill: url(#preloaderPinGradient);
    fill-opacity: 0;
    transition: stroke-dashoffset 1.15s cubic-bezier(.65,0,.35,1) .15s,
                fill-opacity .6s ease .95s,
                stroke-opacity .6s ease 1.5s;
}
#preloader.is-drawing #preloader-logo-path {
    stroke-dashoffset: 0 !important;
    fill-opacity: 1;
    stroke-opacity: .55;
}

/* Wordmark */
.preloader-word {
    display: flex;
    align-items: center;
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 700;
    letter-spacing: 1px;
    color: #f6f6f6;
}
.preloader-word .ch {
    display: inline-block;
    opacity: 0;
    transform: translateY(14px);
    animation: preloader-ch-in .55s cubic-bezier(.2,.8,.2,1) forwards;
}
.preloader-word-a .ch:nth-child(1) { animation-delay: .55s; }
.preloader-word-a .ch:nth-child(2) { animation-delay: .60s; }
.preloader-word-a .ch:nth-child(3) { animation-delay: .65s; }
.preloader-word-a .ch:nth-child(4) { animation-delay: .70s; }
.preloader-word-a .ch:nth-child(5) { animation-delay: .75s; }
.preloader-word-a .ch:nth-child(6) { animation-delay: .80s; }
.preloader-word-bar {
    display: inline-block;
    width: 1px;
    height: .8em;
    margin: 0 12px;
    background: #E20000;
    opacity: 0;
    animation: preloader-fade-in .4s ease .86s forwards;
}
.preloader-word-b .ch:nth-child(1) { animation-delay: .90s; }
.preloader-word-b .ch:nth-child(2) { animation-delay: .95s; }
.preloader-word-b .ch:nth-child(3) { animation-delay: 1.00s; }
.preloader-word-b .ch:nth-child(4) { animation-delay: 1.05s; }
.preloader-word-b .ch:nth-child(5) { animation-delay: 1.10s; }
.preloader-word-b .ch:nth-child(6) { animation-delay: 1.15s; }
@keyframes preloader-ch-in {
    to { opacity: 1; transform: translateY(0); }
}
@keyframes preloader-fade-in {
    to { opacity: 1; }
}

/* Tagline */
.preloader-tagline {
    margin: 12px 0 0 0;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 3px;
    color: rgba(245,245,245,.55);
    opacity: 0;
    animation: preloader-fade-in .6s ease 1.35s forwards;
}
.preloader-tagline .dot { color: #E20000; margin: 0 8px; }

/* Progress */
.preloader-progress {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 34px 0 0 0;
    opacity: 0;
    animation: preloader-fade-in .6s ease 1.5s forwards;
}
.preloader-progress-track {
    width: clamp(140px, 22vw, 220px);
    height: 2px;
    background: rgba(245,245,245,.12);
    position: relative;
    overflow: hidden;
}
.preloader-progress-bar {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 0%;
    background: linear-gradient(90deg, #8f1717, #E20000);
    transition: width .2s linear;
}
.preloader-progress-num {
    min-width: 3.2em;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    color: rgba(245,245,245,.65);
    font-variant-numeric: tabular-nums;
}

.preloader-sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

@media (prefers-reduced-motion: reduce) {
    .preloader-ring { animation: none; }
    .preloader-glow { animation: none; opacity: .7; }
    .preloader-logo,
    .preloader-word .ch,
    .preloader-word-bar,
    .preloader-tagline,
    .preloader-progress {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
    #preloader-logo-path { transition: none; fill-opacity: 1; stroke-opacity: .55; }
    .preloader-panel, .preloader-content { transition-duration: .25s; }
}

@media screen and (max-width: 479px) {
    .preloader-word { font-size: 22px; }
    .preloader-tagline { font-size: 10px; letter-spacing: 2px; }
}