:root {
    --weezer-blue: #00A3E0;        
    --weezer-green: #14B76C;       
    --weezer-yellow: #F4D03F; 
    --weezer-red: #E74C3C;         
    
    --bg-color: #0b0c10;
    --surface-color: #161b22; /* Slightly deepened surface */
    --border-color: #4e5d6c;  /* Softened from stark white to a muted steel blue */
    --text-main: #e2e8f0;     /* Off-white to reduce eye strain */
    --text-muted: #8a99a8;    /* Balanced secondary text */
    --tile-bg: #0f1319;
    
    --correct: var(--weezer-green);
    --partial: var(--weezer-yellow);
    --wrong: #2c3a47;
    
    --bg-pattern-opacity: 0.04;
}

[data-theme="light"] {
    --bg-color: #00A3E0; 
    --surface-color: #ffffff;
    --border-color: #2c3e50;  /* Softened dark border instead of harsh pure black */
    --text-main: #2c3e50;     /* Deep slate text instead of pure black */
    --text-muted: #627284;
    --tile-bg: #f4f7fa;
    --wrong: #8a95a5;
    
    --bg-pattern-opacity: 0.12;
}

/* Base Setup & Sharp Typography */
body {
    font-family: "Courier New", Courier, monospace, system-ui; 
    background-color: var(--bg-color);
    color: var(--text-main);
    text-align: center;
    margin: 0;
    padding: 20px;
    position: relative;
    min-height: 100vh;
    box-sizing: border-box;
    overflow-x: hidden;
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Animated Background Pattern */
body::before {
    content: "";
    position: fixed;
    top: -50%;
    left: -50%;
    right: -50%;
    bottom: -50%;
    width: 200%;
    height: 200%;
    z-index: -1;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='60' viewBox='0 0 160 60'%3E%3Ctext x='10' y='40' font-family='sans-serif' font-weight='900' font-size='22' fill='%2300A3E0' fill-opacity='1'%3E=W=%3C/text%3E%3C/svg%3E");
    opacity: var(--bg-pattern-opacity);
    transform: rotate(-10deg);
    animation: moveBackground 15s linear infinite;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

@keyframes moveBackground {
    0% { transform: translate(0, 0) rotate(-10deg); }
    100% { transform: translate(160px, 60px) rotate(-10deg); }
}

.container {
    max-width: 650px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Sharp Header with Comic Book Split */
header {
    border-bottom: 4px dashed var(--border-color); /* Softened wireframe divider */
    padding-bottom: 20px;
    margin-bottom: 30px;
    position: relative;
    background: transparent;
}

h1 {
    color: #ffffff;
    font-size: 3.2rem;
    letter-spacing: 6px;
    margin: 0;
    font-weight: 900;
    text-transform: uppercase;
    text-shadow: 3px 3px 0px var(--weezer-blue), 6px 6px 0px rgba(0, 95, 133, 0.6);
    cursor: pointer;
    transition: transform 0.1s ease;
}

h1:hover {
    transform: scale(1.03) skewX(-3deg);
}

p.subtitle {
    margin: 10px 0 0 0;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Sharp Toggle Button */
.theme-toggle-btn {
    position: absolute;
    right: 0;
    top: 10px;
    background: var(--surface-color);
    border: 3px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 14px;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 0px; 
    font-weight: 900;
    box-shadow: 3px 3px 0px var(--border-color);
    transition: transform 0.1s, box-shadow 0.1s;
}

.theme-toggle-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0px var(--border-color);
}

/* Menu Panel Dashboard Styles */
#menu-screen {
    display: block;
    animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.menu-section {
    background: var(--surface-color);
    border: 4px solid var(--border-color); /* Tone-matched sharp panel border */
    border-radius: 0px; 
    padding: 24px;
    margin-bottom: 25px;
    box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    text-align: left;
}

.menu-section h2 {
    margin-top: 0;
    font-size: 1.6rem;
    font-weight: 900;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-bottom: 3px solid var(--border-color);
    padding-bottom: 5px;
}

.menu-section h2.daily-header { color: var(--weezer-yellow); text-shadow: 1px 1px 0px rgba(0,0,0,0.5); }
.menu-section h2.endless-header { color: var(--weezer-blue); text-shadow: 1px 1px 0px rgba(0,0,0,0.5); }

.menu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 14px;
    margin-top: 20px;
}

/* Arcade Style Keyboard Key Buttons */
.menu-btn {
    background: var(--tile-bg);
    border: 3px solid var(--border-color);
    color: var(--text-main);
    padding: 18px 10px;
    border-radius: 0px;
    font-weight: 900;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 4px 4px 0px var(--border-color);
    transition: transform 0.1s, box-shadow 0.1s;
}

.menu-btn:hover {
    border-color: var(--weezer-blue);
    background: var(--surface-color);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--weezer-blue);
}

.menu-btn:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px transparent;
}

/* Main Game Arena Container */
#game-screen {
    display: none;
    background: var(--surface-color);
    border: 4px solid var(--border-color);
    border-radius: 0px;
    padding: 25px;
    box-shadow: 8px 8px 0px rgba(0, 0, 0, 0.4);
    animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.mode-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 0px;
    font-size: 0.85rem;
    font-weight: 900;
    text-transform: uppercase;
    margin-bottom: 20px;
    background: var(--border-color);
    color: var(--bg-color);
    border: 2px solid var(--border-color);
    box-shadow: 2px 2px 0px rgba(0,0,0,0.3);
}

/* High Contrast Input Row */
.input-area {
    display: flex;
    gap: 12px;
    margin-bottom: 25px;
}

.game-input {
    flex: 1;
    padding: 16px;
    background: var(--tile-bg);
    color: var(--text-main);
    border: 3px solid var(--border-color);
    border-radius: 0px;
    font-size: 1.1rem;
    font-family: inherit;
    font-weight: bold;
    outline: none;
    box-shadow: inset 3px 3px 0px rgba(0,0,0,0.3);
    transition: border-color 0.2s ease;
}

.game-input:focus {
    border-color: var(--weezer-blue);
    background: var(--bg-color);
}

/* Sharp Action Buttons */
button.guess-btn, button.skip-btn, .action-btn {
    color: #ffffff;
    border: 3px solid var(--border-color);
    padding: 16px 28px;
    font-size: 1.05rem;
    cursor: pointer;
    border-radius: 0px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: transform 0.05s, box-shadow 0.05s;
}

button.guess-btn {
    background-color: var(--weezer-blue);
    box-shadow: 4px 4px 0px var(--border-color);
}

button.skip-btn {
    background-color: #4a525a;
    box-shadow: 4px 4px 0px var(--border-color);
}

button.guess-btn:hover:not(:disabled), button.skip-btn:hover:not(:disabled) {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
}

button.guess-btn:active:not(:disabled), button.skip-btn:active:not(:disabled), .action-btn:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px transparent !important;
}

button.guess-btn:disabled, button.skip-btn:disabled {
    background-color: #1a222d;
    border-color: #2e3b4e;
    box-shadow: none;
    cursor: not-allowed;
    color: var(--text-muted);
}

.action-btn {
    background-color: var(--weezer-green);
    box-shadow: 4px 4px 0px var(--border-color);
    padding: 12px 28px;
    margin: 15px 6px 0 6px;
}

.action-btn.retry {
    background-color: var(--weezer-blue);
}

/* Comic Book Dialogue Style Hint Box */
#hint-box {
    background: var(--tile-bg);
    border: 3px dashed var(--weezer-yellow);
    color: var(--text-main);
    border-radius: 0px;
    padding: 16px;
    margin-bottom: 20px;
    font-weight: bold;
    font-size: 1rem;
    display: none;
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    line-height: 1.5;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.15);
}

/* Sharp Matrix Rows */
.grid {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.row {
    display: grid;
    grid-template-columns: 2.2fr 1.8fr 1fr 1fr 1fr;
    gap: 8px;
}

.header-row {
    font-weight: 900;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 3px solid var(--border-color);
    padding-bottom: 8px;
    margin-bottom: 6px;
}

/* Chunky Grid Tiles */
.tile {
    background-color: var(--tile-bg);
    border: 3px solid var(--border-color); /* Changed from pure white line to theme variable */
    min-height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 900;
    padding: 8px;
    border-radius: 0px; 
    word-break: break-word;
    box-sizing: border-box;
    box-shadow: 3px 3px 0px rgba(0,0,0,0.2);
    transform: rotateX(-90deg);
    animation: flipInSharp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.tile.correct { 
    background-color: var(--correct) !important; 
    border-color: var(--border-color) !important; 
    color: #ffffff !important;
    text-shadow: 1px 1px 0px rgba(0,0,0,0.4);
}

.tile.partial {
    background-color: var(--partial) !important;
    border-color: var(--border-color) !important;
    color: #111111 !important;
}

.tile.wrong { 
    background-color: var(--wrong) !important; 
    border-color: var(--border-color) !important; 
    color: var(--text-muted) !important;
}

/* Internal Value Up/Down Indicators */
.tile .arrow-indicator {
    font-size: 0.75rem;
    margin-top: 6px;
    font-weight: 900;
    letter-spacing: 0.5px;
    background: var(--tile-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 2px 8px;
    border-radius: 0px;
    display: inline-block;
}

#message {
    margin-top: 25px;
    font-size: 1.4rem;
    font-weight: 900;
    min-height: 35px;
    line-height: 1.5;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#streak-display {
    font-weight: 900;
    margin-bottom: 12px;
    color: var(--weezer-green);
    text-transform: uppercase;
    font-size: 1.1rem;
}

.fallback-btn {
    display: inline-block;
    margin-top: 10px;
    background-color: var(--weezer-red);
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 0px;
    font-size: 0.9rem;
    font-weight: 900;
    border: 3px solid var(--border-color);
    box-shadow: 4px 4px 0px rgba(0,0,0,0.3);
    transition: all 0.1s;
}

.fallback-btn:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px transparent;
}

/* Snappy, Distinct Animations */
@keyframes flipInSharp {
    0% { transform: rotateX(-90deg); opacity: 0; filter: brightness(1.4); }
    100% { transform: rotateX(0deg); opacity: 1; filter: brightness(1); }
}

@keyframes popIn {
    0% { opacity: 0; transform: scale(0.92) translateY(10px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}