/*
    Single-version palette.
    Separate game versions should define their own :root values.
*/
:root {
    --body-bg: #000;
    --panel-bg: #000;
    --accent: #990000;
    --text-primary: #e6fffb;
    --text-secondary: #9cc9c4;
    --tile-color: #990000;
    --tile-accent: #990000;
    --control-bg: #990000;
    --control-hover: #444;
    --message-bg: #160000;
    --main-title: rgb(200, 13, 30);
    --warning: #f4c95d;
    --error: #ef6a6a;
    --game-background-image: none;
}

#difficultySelect:focus,
#newBoardBtn:focus,
#shuffleBtn:focus,
.tile:focus {
    outline: none;
}

#difficultySelect:focus-visible,
#newBoardBtn:focus-visible,
#shuffleBtn:focus-visible,
.tile:focus-visible {
    outline: 1px solid var(--accent);
}
html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: var(--body-bg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

html {
    font-size: 18px;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--body-bg);
    background-image: var(--game-background-image);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    color: var(--text-primary);
    font-family: Arial, Helvetica, sans-serif;
}

#masterContainer {
    position: absolute;
    inset: 0px;
    min-width: 0;
    min-height: 0;
    //background-color: var(--panel-bg);
    background-color: transparent;
    border: 0px solid var(--accent);
    border-radius: 0px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* HEADER */
#gameHeader {
    width: 100%;
    box-sizing: border-box;
    flex-shrink: 0;
    flex: 0 0 auto;
    min-height: 60px;
    border-bottom: 1px solid var(--accent);
    font-size: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
}

/* PLAY AREA */
#playArea {
    flex: 1;
    background-image: var(--game-background-image);
    background-position: center top;
    background-size: cover;
    background-repeat: no-repeat;
    min-height: 400px;
    min-width: 0;
    padding: 8px;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* FOOTER */
#gameFooter {
    width: 100%;
    box-sizing: border-box;
    flex-shrink: 0;
    flex: 0 0 auto;
    min-height: 60px;
    border-top: 1px solid var(--accent);
    font-size: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 0 12px;
}

#gameHeader,
#gameFooter {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--message-bg);
    backdrop-filter: blur(2px);
}
.title {
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    color: var(--accent);
    // color: var(--text-primary);
}
.title.red { color: var(--main-title);} 
.title.white { color: var(--text-primary);} 

#difficultySelect,
#newBoardBtn,
#shuffleBtn {
    height: 32px;
    border: 0px solid var(--accent);
    border-radius: 5px;
    background: var(--control-bg);
    color: var(--text-primary);
    padding: 0 10px;
    font: inherit;
    cursor: pointer;
}

#newBoardBtn:hover,
#shuffleBtn:hover,
#difficultySelect:hover {
    background: var(--control-hover);
}

/* CENTERED MESSAGE OVERLAY
   Expected structure:
   #messageOverlay
     #messageContainer
       #messagePortrait
         img (optional later)
       #messageBox
*/
#messageOverlay {
    position: absolute;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    background: rgba(0, 0, 0, 0.0);
    backdrop-filter: blur(0.5px);
    -webkit-backdrop-filter: blur(0.5px);
    transition:
        opacity 0.2s ease,
        backdrop-filter 0.8s ease,
        -webkit-backdrop-filter 0.8s ease;
}

#messageOverlay.message-visible {
    visibility: visible;
    opacity: 1;
}

#messageContainer {
    position: relative;
    width: min(90vw, 720px);
    padding-top: 74px; /* room for the overlapping portrait */
    box-sizing: border-box;
    opacity: 0;
    transform: translateY(12px) scale(0.96);
}

/* Main variable-message panel. Height grows with the text. */
#messageBox {
    width: 100%;
    min-height: 160px;
    padding-top: 75px;
    padding-right: 36px;
    padding-bottom: 30px;
    padding-left: 36px;
    box-sizing: border-box;
    border: 1px solid var(--accent);
    border-radius: 40px;
    background: var(--message-bg);
    color: var(--text-primary);
    box-shadow: 0 0 0 6px var(--message-bg);
    font-size:1.1rem;
    line-height: 1.4;
    text-align: center;
    overflow-wrap: anywhere;
    white-space: pre-line;
}

/* Portrait overlaps the top edge of the message box. */
#messagePortrait {
    position: absolute;
    z-index: 2;
    top: -30px;
    left: 50%;
    width: 160px;
    aspect-ratio: 1;
    transform: translateX(-50%);
    box-sizing: border-box;
    overflow: hidden;
    border: 1px solid var(--accent);
    border-radius: 50%;
    background-color:var(--message-bg);
    box-shadow: 0 0 0 6px var(--message-bg);
}

/* Placeholder label until portrait image selection is wired in. */
#messagePortrait::after {
    content: "PORTRAIT";
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.7rem;
    font-weight: bold;
    letter-spacing: 0.08em;
}

/* Ready for a real portrait later: put an <img> inside #messagePortrait. */
#messagePortrait img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

#messagePortrait:has(img)::after {
    content: none;
}

#messageOverlay.message-visible #messageContainer {
    animation: messageAppear 250ms ease-out forwards;
}

#messageOverlay.message-fading #messageContainer {
    animation: messageFade 250ms ease-in forwards;
}

@keyframes messageAppear {
    from { opacity: 0; transform: translateY(12px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes messageFade {
    from { opacity: 1; transform: translateY(0) scale(1); }
    to { opacity: 0; transform: translateY(-8px) scale(0.98); }
}

@media (max-width: 520px) {
    #messageContainer {
        width: min(94vw, 720px);
        padding-top: 60px;
    }

    #messagePortrait {
        width: 120px;
    }

    #messageBox {
        min-height: 150px;
        padding: 58px 22px 28px;
        border-radius: 38px;
    }
}

@media (prefers-reduced-motion: reduce) {
    #messageOverlay.message-visible #messageContainer,
    #messageOverlay.message-fading #messageContainer {
        animation-duration: 1ms;
    }
}

/* Mobile-first viewport and safe-area handling. */
html, body { height: 100%; height: 100dvh; }
#gameHeader { padding-left: max(8px, env(safe-area-inset-left)); padding-right: max(8px, env(safe-area-inset-right)); padding-top: env(safe-area-inset-top); }
#gameFooter { padding-bottom: max(4px, env(safe-area-inset-bottom)); padding-left: max(8px, env(safe-area-inset-left)); padding-right: max(8px, env(safe-area-inset-right)); }
#difficultySelect, #newBoardBtn, #shuffleBtn { font-size: 14px; min-width: 0; }
#gameHeader { font-size: 14px; gap: 6px; }
@media (max-width: 380px) { #gameHeader { padding-left: 6px; padding-right: 6px; } #difficultySelect { max-width: 68vw; } }