:root {
    --bg-color: #0d1117;
    --text-color: #e6edf3;
    --primary: #58a6ff;
    --primary-hover: #3182ce;
    --secondary: #21262d;
    --glass-bg: rgba(22, 27, 34, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --correct: #2ea043;
    --present: #d29922;
    --absent: #30363d;
    --tile-empty: #21262d;

    --font-main: 'Poppins', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

/* Animations for atmosphere removed for maximum performance */
.danger-bg {
    animation: dangerPulse 2s infinite alternate;
}

@keyframes dangerPulse {
    0% { background-color: var(--bg-color); }
    100% { background-color: #2a0a0a; } /* Dark red tint */
}

/* Base UI Components */
.hidden { display: none !important; }

.container {
    width: 100%;
    max-width: 1200px;
    padding: 20px;
    z-index: 1;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

h1.logo {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.logo .highlight { color: var(--primary); }

.version-badge {
    font-size: 0.9rem;
    background: rgba(88, 166, 255, 0.2);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 12px;
    vertical-align: super;
    font-weight: 600;
    border: 1px solid rgba(88, 166, 255, 0.4);
}

.version-badge-small {
    font-size: 0.7rem;
    background: rgba(88, 166, 255, 0.2);
    color: var(--primary);
    padding: 1px 6px;
    border-radius: 8px;
    vertical-align: super;
    font-weight: 600;
}

.logo-small {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.main-logo-img {
    max-width: 80px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.header-logo-img {
    max-height: 40px;
    width: auto;
    border-radius: 8px;
}

input[type="text"] {
    width: 100%;
    padding: 15px 20px;
    margin: 20px 0;
    background: rgba(0,0,0,0.4);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: #ffffff;
    font-size: 1.1rem;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}
input[type="text"]::placeholder {
    color: rgba(255, 255, 255, 0.6);
}
input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}
input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn {
    padding: 12px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
    font-family: inherit;
    width: 100%;
}
.primary-btn {
    background-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(88, 166, 255, 0.3);
}
.primary-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}
.secondary-btn {
    background-color: var(--secondary);
    color: white;
    border: 1px solid var(--glass-border);
}
.secondary-btn:hover {
    background-color: #30363d;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Join Screen Specifics */
#join-screen {
    max-width: 450px;
    margin: 0 auto;
    animation: fadeUp 0.6s ease-out forwards;
}

/* Game Screen Layout */
#game-screen {
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: fadeUp 0.6s ease-out forwards;
}

.glass-header {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.round-info {
    font-weight: 600;
    font-size: 1.2rem;
    background: rgba(255,255,255,0.1);
    padding: 5px 15px;
    border-radius: 20px;
}

.timer-box {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.main-layout {
    display: grid;
    grid-template-columns: 250px 1fr 300px;
    gap: 20px;
    align-items: flex-start;
}

@media (max-width: 900px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
}

/* Sidebar styles */
.sidebar {
    padding: 20px;
    text-align: left;
}
.sidebar h3 {
    margin-bottom: 15px;
    font-size: 1.1rem;
    color: #8b949e;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Leaderboard */
#leaderboard {
    list-style: none;
}
#leaderboard li {
    padding: 10px;
    margin-bottom: 8px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    transition: background 0.3s;
}
#leaderboard li.active-turn {
    background: rgba(88, 166, 255, 0.2);
    border-left: 4px solid var(--primary);
}

/* Board Area */
.board-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.turn-banner {
    background: rgba(46, 160, 67, 0.2);
    color: #4ade80;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.2rem;
    border: 1px solid rgba(46, 160, 67, 0.4);
    box-shadow: 0 0 15px rgba(46, 160, 67, 0.1);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
}
.turn-banner.wait {
    background: rgba(210, 153, 34, 0.2);
    color: #fbbf24;
    border-color: rgba(210, 153, 34, 0.4);
    box-shadow: 0 0 15px rgba(210, 153, 34, 0.1);
}
.turn-banner.error {
    background: rgba(248, 81, 73, 0.2);
    color: #f87171;
    border-color: rgba(248, 81, 73, 0.4);
    box-shadow: 0 0 15px rgba(248, 81, 73, 0.1);
}

/* Game Board & Tiles */
.game-board {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.word-row {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.tile {
    width: 60px;
    height: 60px;
    background-color: var(--tile-empty);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    font-weight: 800;
    text-transform: uppercase;
    user-select: none;
    transition: transform 0.3s, background-color 0.3s, border-color 0.3s;
}

@media (max-width: 600px) {
    .tile { width: 45px; height: 45px; font-size: 1.5rem; }
}

.tile[data-state='correct'] {
    background-color: var(--correct);
    border-color: var(--correct);
    color: white;
    animation: popIn 0.4s ease forwards;
}
.tile[data-state='present'] {
    background-color: var(--present);
    border-color: var(--present);
    color: white;
    animation: popIn 0.4s ease forwards;
}
.tile[data-state='absent'] {
    background-color: var(--absent);
    border-color: transparent;
    color: white;
    animation: popIn 0.4s ease forwards;
}

.tile.filled {
    border-color: #8b949e;
    animation: bounce 0.2s ease-in-out;
}

.message-text {
    margin-top: 15px;
    font-weight: 600;
    min-height: 24px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
}

/* Animations */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    40% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}