:root {
    --board-bg-1: #060b18;
    --board-bg-2: #0f1b33;
    --board-surface: rgba(15, 23, 42, 0.55);
    --board-border: rgba(148, 163, 184, 0.28);
    --board-text: #f1f5f9;
    --board-muted: #94a3b8;
    --board-accent: #818cf8;
    --board-accent-strong: #a5b4fc;
    --board-warning: #f87171;
}

html, body {
    height: 100%;
    margin: 0;
    overflow: hidden;
    background: radial-gradient(ellipse at top, var(--board-bg-2) 0%, var(--board-bg-1) 65%);
    color: var(--board-text);
    font-family: 'Segoe UI', Inter, system-ui, -apple-system, sans-serif;
}

#display-board {
    /* 100vh ostaje fallback za starije ekrane. Mobilni Safari racuna 100vh i
       iza svojih alatnih traka, pa poslednji red (info-traka) moze da zavrsi
       van vidljivog dela. 100dvh prati stvarnu, trenutno vidljivu visinu. */
    height: 100vh;
    height: 100dvh;
    width: 100vw;
    box-sizing: border-box;
    padding: clamp(0.6rem, 1.4vh, 1.6rem) clamp(0.9rem, 2vw, 2.2rem);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) minmax(0, 1.7fr) minmax(0, 1.1fr) auto;
    gap: clamp(0.4rem, 1vh, 1rem);
    transition: filter .3s ease;
}

#display-board.is-dimmed {
    filter: brightness(0.35) blur(1px);
}

.board-header {
    text-align: center;
}

.board-school-name {
    margin: 0;
    font-size: clamp(1.4rem, 3.6vh, 6rem);
    font-weight: 800;
    letter-spacing: .03em;
    color: var(--board-accent-strong);
    text-transform: uppercase;
}

.board-info-row {
    display: grid;
    grid-template-columns: 1.1fr 0.8fr 1.1fr;
    gap: clamp(0.5rem, 1.2vw, 1.5rem);
    min-height: 0;
}

.board-panel {
    background: var(--board-surface);
    border: 1px solid var(--board-border);
    border-radius: clamp(12px, 1.6vh, 22px);
    padding: clamp(0.6rem, 1.4vh, 1.2rem) clamp(0.8rem, 1.6vw, 1.5rem);
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 0;
    min-width: 0;
    overflow: hidden;
}

.board-clock-block { align-items: flex-start; text-align: left; }
.board-logo-block { align-items: center; text-align: center; }
.board-media-block { align-items: center; justify-content: center; text-align: center; }

.board-clock {
    font-variant-numeric: tabular-nums;
    font-size: clamp(2.2rem, 7vh, 11rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: .02em;
}

.board-date {
    margin-top: clamp(0.2rem, .8vh, .6rem);
    font-size: clamp(0.9rem, 2.2vh, 3rem);
    color: var(--board-muted);
}

.board-meta-line {
    margin-top: clamp(0.4rem, 1vh, .9rem);
    display: flex;
    gap: clamp(0.6rem, 1.2vw, 1.2rem);
    flex-wrap: wrap;
}

.board-pill {
    display: inline-flex;
    align-items: center;
    padding: .3em .85em;
    border-radius: 999px;
    background: rgba(129, 140, 248, 0.18);
    border: 1px solid rgba(165, 180, 252, 0.4);
    font-size: clamp(0.75rem, 1.7vh, 2rem);
    font-weight: 600;
    color: var(--board-accent-strong);
}

.board-logo-mark {
    width: clamp(3.2rem, 9vh, 12rem);
    height: clamp(3.2rem, 9vh, 12rem);
    border-radius: 28%;
    background: linear-gradient(135deg, #4338ca, #6366f1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(1.4rem, 4vh, 5rem);
    font-weight: 800;
    color: white;
    margin: 0 auto clamp(0.3rem, .8vh, .6rem);
}

.board-media-placeholder {
    color: var(--board-muted);
    font-size: clamp(0.8rem, 1.8vh, 2.2rem);
}

.board-status {
    background: var(--board-surface);
    border: 1px solid var(--board-border);
    border-radius: clamp(14px, 1.8vh, 26px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: clamp(0.3rem, 1vh, .8rem);
    min-height: 0;
    padding: clamp(0.5rem, 1vh, 1rem);
}

.board-status-mode {
    font-size: clamp(1.2rem, 3.4vh, 5rem);
    font-weight: 700;
    color: var(--board-text);
}

.board-countdown {
    font-variant-numeric: tabular-nums;
    font-size: clamp(3rem, 11vh, 16rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: .02em;
    color: var(--board-accent-strong);
    transition: color .3s ease;
}

.board-next {
    display: flex;
    gap: .6em;
    align-items: baseline;
    font-size: clamp(0.9rem, 2.4vh, 3.2rem);
    color: var(--board-muted);
}

.board-next-time {
    font-weight: 700;
    color: var(--board-text);
    font-variant-numeric: tabular-nums;
}

.board-classes {
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: clamp(0.4rem, 1vw, .8rem);
    min-height: 0;
    overflow: hidden;
}

.board-class-card {
    flex: 1 1 clamp(7rem, 16vw, 14rem);
    background: rgba(30, 41, 59, 0.65);
    border: 1px solid var(--board-border);
    border-radius: clamp(10px, 1.2vh, 16px);
    padding: clamp(0.4rem, 1vh, .9rem) clamp(0.6rem, 1.2vw, 1rem);
    display: flex;
    flex-direction: column;
    gap: .2em;
    min-width: 0;
}

.board-class-card strong {
    font-size: clamp(0.9rem, 2.2vh, 2.6rem);
    color: var(--board-accent-strong);
}

.board-class-card span {
    font-size: clamp(0.8rem, 1.9vh, 2.2rem);
    color: var(--board-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.board-class-card--empty {
    color: var(--board-muted);
    justify-content: center;
    align-items: center;
    text-align: center;
    flex: 1 1 100%;
}

.board-more-chip {
    justify-content: center;
    align-items: center;
    color: var(--board-muted);
    font-weight: 700;
}

.board-ticker {
    background: rgba(2, 6, 23, 0.7);
    border: 1px solid var(--board-border);
    border-radius: 999px;
    overflow: hidden;
    padding: clamp(0.35rem, .9vh, .7rem) 0;
    white-space: nowrap;
}

.board-ticker.is-empty {
    visibility: hidden;
}

.board-ticker-text {
    display: inline-block;
    font-size: 2.5vh;
    color: var(--board-muted);
    transform: translate3d(var(--ticker-start, 100vw), 0, 0);
    will-change: transform;
    backface-visibility: hidden;
    /* Trajanje računa renderer iz stvarne širine TV ekrana i teksta. */
    animation: board-ticker-scroll 44s linear infinite;
}

@keyframes board-ticker-scroll {
    0% { transform: translate3d(var(--ticker-start, 100vw), 0, 0); }
    100% { transform: translate3d(var(--ticker-end, -100%), 0, 0); }
}

#board-banner {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    text-align: center;
    padding: 2rem;
    z-index: 1500;
    background: rgba(2, 6, 23, 0.92);
    backdrop-filter: blur(2px);
}

#board-banner.is-active {
    display: flex;
}

#board-banner-title {
    font-size: clamp(1.8rem, 5vh, 7rem);
    font-weight: 800;
    color: #fecaca;
}

#board-banner-message {
    font-size: clamp(1rem, 2.6vh, 3.2rem);
    color: #fee2e2;
    max-width: 60ch;
}

@media (max-width: 640px) {
    #display-board {
        grid-template-rows: auto auto minmax(0, 0.9fr) minmax(0, 1.1fr) auto;
    }
    /* Na telefonu sat i logotip dele isti red — sat levo, logotip desno —
       a prostor za multimediju se sklanja jer ga nema dovoljno. */
    .board-info-row {
        grid-template-columns: minmax(0, 1fr) auto;
        grid-auto-rows: minmax(0, auto);
    }
    .board-media-block { display: none; }
    .board-logo-block {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        background: none;
        border: none;
        box-shadow: none;
        padding: 0;
    }
    .board-logo-img { max-height: 9vh; }
    .board-clock { font-size: 4vh; }
    .board-status {
        /* Mobilni Safari menja vidljivu visinu dok prikazuje alatne trake.
           Kompaktni, centrirani razmaci zadrzavaju najavu sledeceg dogadjaja
           unutar iste kartice sa statusom i odbrojavanjem. */
        justify-content: center;
        gap: clamp(.15rem, .6vh, .45rem);
        padding: clamp(.25rem, .7vh, .55rem) clamp(.5rem, 1.5vw, .8rem);
    }
    .board-next {
        max-width: 100%;
        justify-content: center;
        line-height: 1.15;
    }
    .board-classes {
        align-content: flex-start;
    }
}

/* Uspravni ekran (npr. TV okrenut vertikalno): sat i logotip i dalje dele red,
   jer bi logotip u zasebnom redu pojeo prostor koji treba rasporedu casova.
   Ranije je ovo pravilo vracalo jednu kolonu i ponistavalo mobilni raspored. */
@media (orientation: portrait) and (min-height: 700px) {
    .board-info-row {
        grid-template-columns: minmax(0, 1fr) auto;
    }
    .board-media-block {
        display: none;
    }
}

/* MASTER §23 — toggled-off elements are removed from the flow (layout
   reflows to fill the space), not just hidden with visibility. */
.is-toggled-off {
    display: none !important;
}

/* ---------- Multimedia panel (MASTER §21) ---------- */
.board-media-block {
    padding: clamp(0.4rem, 1vh, 0.8rem);
}
.board-equalizer {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: .3em;
    height: clamp(2.5rem, 7vh, 5rem);
}
.board-equalizer span {
    width: clamp(.3rem, .8vw, .6rem);
    background: var(--board-accent-strong);
    border-radius: 3px;
    animation: board-eq-bounce 1.1s ease-in-out infinite;
}
.board-equalizer span:nth-child(1) { animation-delay: 0s; }
.board-equalizer span:nth-child(2) { animation-delay: .15s; }
.board-equalizer span:nth-child(3) { animation-delay: .3s; }
.board-equalizer span:nth-child(4) { animation-delay: .45s; }
.board-equalizer span:nth-child(5) { animation-delay: .6s; }
@keyframes board-eq-bounce {
    0%, 100% { height: 20%; }
    50% { height: 100%; }
}
.board-media-title {
    margin-top: .5rem;
    font-size: clamp(0.75rem, 1.6vh, 1.1rem);
    color: var(--board-muted);
    text-align: center;
}
.board-media-frame {
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: var(--radius-md, 14px);
    min-height: 6rem;
}

/* Pozadinska slika teme (FAZA 17). Slika ide ispod zatamnjenja, koje admin
   podesava — bez njega tekst preko svetle fotografije postaje necitljiv. */
body.has-bg-image {
    background-image:
        linear-gradient(var(--board-image-dim, rgba(2, 6, 23, .45)), var(--board-image-dim, rgba(2, 6, 23, .45))),
        var(--board-image, none);
    background-size: auto, var(--board-image-size, cover);
    background-repeat: no-repeat, var(--board-image-repeat, no-repeat);
    background-position: center, center;
}
body { font-family: var(--board-font, 'Segoe UI', Inter, system-ui, -apple-system, sans-serif); }

.board-logo-img {
    max-width: 100%;
    max-height: clamp(70px, 15vh, 190px);
    object-fit: contain;
}
.board-logo-img:not([hidden]) ~ .board-logo-mark { display: none; }

/* Znak umesto logotipa: skolsko zvono, dok skola ne postavi svoj grb. */
.board-logo-mark svg { width: 1em; height: 1em; display: block; }
.board-logo-mark[hidden] { display: none !important; }

/* Rezim mirovanja: ekran se svodi na sam logotip skole. */
body.is-idle .board-header,
body.is-idle .board-status,
body.is-idle .board-classes,
body.is-idle .board-ticker,
body.is-idle .board-clock-block,
body.is-idle .board-media-block { visibility: hidden; }
body.is-idle .board-logo-block {
    position: fixed;
    inset: 0;
    z-index: 5;
    display: grid;
    place-items: center;
    background: none;
    border: none;
    box-shadow: none;
    padding: 6vh 6vw;
}
body.is-idle .board-logo-img { max-height: min(62vh, 62vw); max-width: min(62vh, 62vw); }
body.is-idle .board-logo-mark { font-size: clamp(4rem, 18vw, 14rem); }

/* Rotacija odeljenja: fade izmedju stranica + tackice koje pokazuju koliko
   stranica postoji i koja je na redu. */
.board-classes-wrap {
    min-height: 0;
    display: grid;
    grid-template-rows: minmax(0, 1fr) auto;
    gap: clamp(.25rem, .6vh, .5rem);
}
.board-classes { transition: opacity .6s ease; }
.board-classes.is-fading { opacity: 0; }

.board-classes-dots {
    display: flex;
    justify-content: center;
    gap: clamp(.35rem, .8vw, .6rem);
}
.board-page-dot {
    width: clamp(6px, .7vh, 11px);
    height: clamp(6px, .7vh, 11px);
    border-radius: 50%;
    background: var(--board-muted);
    opacity: .38;
    transition: opacity .3s ease, background .3s ease;
}
.board-page-dot.is-current { background: var(--board-accent-strong); opacity: 1; }

/* Kada multimedija nije podesena, prostor pokazuje napredak casa: zvonce trci
   ka skoli i stigne tacno kad zvoni. */
.media-lane {
    width: 100%;
    display: grid;
    gap: clamp(.4rem, 1.2vh, .9rem);
    align-content: center;
    padding: 0 clamp(.6rem, 1.4vw, 1.4rem);
    --lane-progress: 0%;
}
.media-lane-track {
    position: relative;
    height: clamp(8px, 1.1vh, 14px);
    border-radius: 999px;
    background: rgba(148, 163, 184, .22);
    margin: clamp(1.4rem, 3.4vh, 2.6rem) clamp(1.5rem, 3vw, 2.4rem) 0 0;
}
.media-lane-fill {
    position: absolute;
    inset: 0 auto 0 0;
    width: var(--lane-progress);
    border-radius: 999px;
    background: linear-gradient(90deg, var(--board-accent), var(--board-accent-strong));
    transition: width .9s linear;
}
.media-lane-runner {
    position: absolute;
    top: 50%;
    left: var(--lane-progress);
    width: clamp(20px, 2.9vh, 38px);
    height: clamp(20px, 2.9vh, 38px);
    margin-left: clamp(-10px, -1.45vh, -19px);
    transform: translateY(-50%);
    color: var(--board-accent-strong);
    transition: left .9s linear;
    animation: lane-hop 1.1s ease-in-out infinite;
}
.media-lane-runner svg,
.media-lane-goal svg { width: 100%; height: 100%; }
.media-lane-goal {
    position: absolute;
    top: 50%;
    left: 100%;
    width: clamp(18px, 2.4vh, 32px);
    height: clamp(18px, 2.4vh, 32px);
    margin-left: clamp(.35rem, .8vw, .7rem);
    transform: translateY(-50%);
    color: var(--board-muted);
}
.media-lane-label {
    text-align: center;
    font-size: clamp(.75rem, 1.7vh, 1.5rem);
    color: var(--board-muted);
}

/* Poslednji minut: zvonce se trese jace i sve pocrveni. */
.media-lane.is-warning .media-lane-fill { background: linear-gradient(90deg, #f97316, #ef4444); }
.media-lane.is-warning .media-lane-runner { color: #ef4444; animation-duration: .45s; }
.media-lane.is-warning .media-lane-label { color: #fca5a5; }

@keyframes lane-hop {
    0%, 100% { transform: translateY(-50%) rotate(-9deg); }
    50%      { transform: translateY(-72%) rotate(9deg); }
}
@media (prefers-reduced-motion: reduce) {
    .media-lane-runner { animation: none; }
}

/* Klasa sa display: inline-block nadjacava ugradjeno pravilo za [hidden], pa
   je sakriveni element ostajao vidljiv kao prazna pilula. */
[hidden] { display: none !important; }

/* Fotografija u multimedijalnom polju: uklapa se u prostor, ne iseca se. */
.board-media-photo {
    max-width: 100%;
    max-height: 78%;
    object-fit: contain;
    border-radius: .6vh;
}

/* ---- Фонт и величина по елементу -------------------------------------
   Тема бира фонт и размеру за сваки део табле посебно. Ако избора нема,
   променљива не постоји: фонт се наслеђује, а размера остаје 1.
   Основна величина остаје у vh јединицама, па табла и даље прати екран —
   размера је само множилац преко тога. */
.board-school-name {
    font-family: var(--font-school-name, inherit);
    font-size: calc(clamp(1.4rem, 3.6vh, 6rem) * var(--scale-school-name, 1));
}
.board-clock {
    font-family: var(--font-clock, inherit);
    font-size: calc(clamp(2.2rem, 7vh, 11rem) * var(--scale-clock, 1));
}
.board-date {
    font-family: var(--font-date, inherit);
    font-size: calc(clamp(0.9rem, 2.2vh, 3rem) * var(--scale-date, 1));
}
.board-countdown {
    font-family: var(--font-countdown, inherit);
    font-size: calc(clamp(3rem, 11vh, 16rem) * var(--scale-countdown, 1));
}
.board-classes { font-family: var(--font-classes, inherit); }
.board-class-card strong { font-size: calc(clamp(0.9rem, 2.2vh, 2.6rem) * var(--scale-classes, 1)); }
.board-class-card span   { font-size: calc(clamp(0.8rem, 1.9vh, 2.2rem) * var(--scale-classes, 1)); }
.board-ticker-text {
    font-family: var(--font-ticker, inherit);
    font-size: calc(2.5vh * var(--scale-ticker, 1));
}
.board-status { font-family: var(--font-status, inherit); }
.board-status-mode { font-size: calc(clamp(1.2rem, 3.4vh, 5rem) * var(--scale-status, 1)); }

/* Мултимедија се смењује утапањем, да прелаз не сече очи у полумрачном ходнику. */
.board-media-block > * { animation: media-fade-in .6s ease both; }
.board-media-block.is-fading-out > * { animation: media-fade-out .5s ease both; }
@keyframes media-fade-in  { from { opacity: 0; transform: scale(.985); } to { opacity: 1; transform: none; } }
@keyframes media-fade-out { from { opacity: 1; } to { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
    .board-media-block > *,
    .board-media-block.is-fading-out > * { animation: none; }
}