:root {
    --highlight-color: #ffff00;
    --highlight-bg-mode: #ffffff;
    --highlight-text-mode: #333333;
    --highlight-box-shadow: 0 0 1.5vh var(--highlight-color), inset 0 0 1vh rgba(255, 255, 255, 0.5);
}

body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #ff4b1f, #ff9068); /* Default Theme */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
    user-select: none;
    color: white;
    transition: background 0.5s;
}

#game-container {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#header {
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 15px;
    background-color: rgba(0,0,0,0.3);
    color: white;
    font-size: 28px;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    backdrop-filter: blur(5px);
    position: absolute;
    top: 0;
    z-index: 10;
}

#main-content {
    flex-grow: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-bottom: 20px;
}

/* Menu Styles */
.menu-title {
    font-family: 'Arial Black', sans-serif;
    font-size: 8vmin; /* Fluid font size */
    color: white;
    margin-bottom: 4vh;
    text-align: center;
    text-shadow: 4px 4px 8px rgba(0,0,0,0.4);
    letter-spacing: 2px;
}

.menu-button {
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    font-size: 4vmin; /* Fluid font size */
    padding: 2vh 6vw; /* Fluid padding */
    border: 0.5vmin solid transparent;
    border-radius: 50px;
    margin: 1.5vh;
    cursor: pointer;
    box-shadow: 0 0.6vh 1vh rgba(0,0,0,0.2);
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
    font-weight: bold;
    width: 80vw; /* Wider for safety */
    max-width: 800px; /* Increased from 500px */
    text-align: center;
    white-space: normal !important; /* Force wrap */
    overflow: visible !important;
    text-overflow: clip !important; /* Never ellipsis */
    height: auto;
    min-height: 2em;
    display: block; /* Ensure block model */
}

.menu-button:hover {
    transform: translateY(-0.3vh);
    box-shadow: 0 0.8vh 1.5vh rgba(0,0,0,0.3);
    background: white;
}

.menu-button:active {
    transform: translateY(0.1vh);
    box-shadow: 0 0.4vh 0.6vh rgba(0,0,0,0.2);
}

/* Scanning Highlight Class */
.highlight {
    border-color: var(--highlight-color) !important;
    background-color: var(--highlight-bg-mode) !important;
    transform: scale(1.05);
    box-shadow: var(--highlight-box-shadow) !important;
    z-index: 5;
    color: var(--highlight-text-mode) !important;
}

/* Color Swatch in Settings */
.color-swatch {
    display: inline-block;
    width: 3vmin;
    height: 3vmin;
    border: 0.3vmin solid #666;
    vertical-align: middle;
    margin-left: 1vw;
    box-shadow: 0 0.2vh 0.5vh rgba(0,0,0,0.3);
}

/* Full Cell Highlight Variant (Optional - handled via JS var now, but keeping for reference or explicit usage) */
.highlight-full {
    background-color: var(--highlight-color) !important;
    color: black !important;
    box-shadow: 0 0 2vh var(--highlight-color);
}

/* Game Styles */
.word-container {
    display: flex;
    gap: 1.5vmin;
    margin-bottom: 2vh;
    min-height: 8vh;
    justify-content: center;
}

.sentence-display {
    font-size: 6vmin;
    margin-bottom: 3vh;
    text-align: center;
    max-width: 90%;
    line-height: 1.4;
    text-shadow: 0.2vh 0.2vh 0.4vh rgba(0,0,0,0.4);
    min-height: 5vh;
    padding: 0 10px;
}

.letter-slot {
    width: 10vmin;
    height: 12vmin;
    border-bottom: 0.5vmin solid white;
    border: 0.5vmin solid transparent; /* Prepare for border highlight */
    border-bottom-color: white; 
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8vmin;
    font-weight: bold;
    text-shadow: 0.2vh 0.2vh 0.4vh rgba(0,0,0,0.3);
    transition: all 0.2s;
}

.letter-slot.highlight {
    border: 0.5vmin solid var(--highlight-color);
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
}

.letters-pool {
    display: flex;
    flex-wrap: wrap;
    gap: 2vmin;
    justify-content: center;
    max-width: 90vw;
    margin-bottom: 2vh;
}

.letter-tile {
    width: 10vmin;
    height: 10vmin;
    background: white;
    color: #333;
    border: 0.5vmin solid transparent;
    border-radius: 1vmin;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 7vmin;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 0.4vh 0.8vh rgba(0,0,0,0.2);
    transition: transform 0.2s, background-color 0.2s;
}

.letter-tile:hover {
    transform: scale(1.1);
}

.letter-tile.highlight {
    border-color: var(--highlight-color);
    transform: scale(1.15);
}

.letter-tile.used {
    background: rgba(255, 255, 255, 0.3);
    color: rgba(0, 0, 0, 0.3);
    cursor: default;
    transform: none;
    border-color: transparent;
}

.letter-tile.used.highlight {
    border-color: rgba(255, 255, 0, 0.5);
    background: rgba(255, 255, 255, 0.4);
}

.result-message {
    font-size: 4vmin;
    margin-top: 1vh;
    font-weight: bold;
    min-height: 5vh;
    text-shadow: 0.2vh 0.2vh 0.4vh rgba(0,0,0,0.4);
    text-align: center;
}

.game-controls {
    margin-top: 3vh;
    display: flex;
    gap: 2vmin;
    flex-wrap: wrap;
    justify-content: center;
}

.control-btn {
    background: rgba(0, 0, 0, 0.3);
    color: white;
    border: 0.5vmin solid white;
    padding: 1.5vmin 4vmin;
    border-radius: 4vmin;
    font-size: 3vmin;
    cursor: pointer;
    transition: background-color 0.2s;
}

.control-btn:hover {
    background: rgba(0, 0, 0, 0.5);
}

.control-btn.highlight {
    background: rgba(0, 0, 0, 0.6);
    border-color: var(--highlight-color);
}

/* Pause Overlay */
.pause-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.pause-title {
    font-family: 'Arial Black', sans-serif;
    font-size: 8vmin;
    color: white;
    margin-bottom: 3vh;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

/* HP Bar Styles (Matchy Match Style) */
.hp-container {
    width: 60vw;
    max-width: 600px;
    height: 3vh;
    min-height: 20px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 2vh;
    margin: 1vh 0 2vh 0;
    overflow: hidden;
    border: 0.3vmin solid rgba(255, 255, 255, 0.3);
    position: relative;
    box-shadow: 0 0.4vh 1vh rgba(0,0,0,0.3);
}

.hp-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff3333, #ffcc00, #33ff33);
    width: 100%;
    transition: width 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 0 0 1vmin rgba(255, 255, 255, 0.5);
}

.hp-text {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2vmin;
    font-weight: bold;
    text-shadow: 1px 1px 2px black;
    color: white;
}

/* Ensure game fits in view without scrolling if possible */
#main-content {
    max-height: 100vh;
    overflow-y: auto;
    scrollbar-width: none; /* Firefox */
}
#main-content::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

/* Pause Button (Matchy Match Style) */
#pause-button {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    cursor: pointer;
    z-index: 1000;
    user-select: none;
    border: 2px solid rgba(255,255,255,0.5);
    backdrop-filter: blur(4px);
    transition: all 0.2s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

#pause-button.highlight {
    background: var(--highlight-color);
    color: black;
    border-color: white;
    transform: scale(1.1);
    box-shadow: 0 0 20px var(--highlight-color);
}

/* Word Image Style */
.word-image {
    background-color: transparent;
    max-width: 60vw;
    max-height: 30vh;
    display: block;
    margin: 0 auto 2vh auto;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    object-fit: contain;
}

/* Sentence Highlight */
.sentence-display.highlight {
    background-color: rgba(255,255,255,0.2);
    border-radius: 10px;
    box-shadow: 0 0 15px var(--highlight-color);
    border: 2px solid var(--highlight-color);
    cursor: pointer;
}
.word-image

 max-width: 40vw; max-height: 25vh; margin-bottom: 2vh; border-radius: 10px; 

box-shadow: 0 4px 8px rgba(0,0,0,0.3); object-fit: contain;