:root {
    --primary: #007bff;
    --success: #28a745;
    --warning: #f1c40f;
    --danger: #dc3545;
    --bg: #0d0d0d;
    --board-white: #f0d9b5;
    --board-black: #b58863;
}

body { 
    background: radial-gradient(circle at center, #1a1a1a 0%, #050505 100%);
    color: white; font-family: 'Segoe UI', Roboto, sans-serif; 
    margin: 0; display: flex; justify-content: center; align-items: center; min-height: 100vh;
}

.game-container { display: flex; gap: 30px; padding: 20px; max-width: 1300px; width: 100%; }

#chess-board { 
    display: grid; grid-template-columns: repeat(8, 65px); grid-template-rows: repeat(8, 65px); 
    border: 10px solid #222; border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.8), 0 0 20px rgba(0, 123, 255, 0.1);
    transition: transform 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.flipped { transform: rotate(180deg); }
.flipped .square img { transform: rotate(180deg); }

.square { 
    width: 65px; height: 65px; display: flex; justify-content: center; 
    align-items: center; cursor: pointer; position: relative; 
}

.white-sq { background-color: var(--board-white); }
.black-sq { background-color: var(--board-black); }

.move-dot {
    width: 18px;
    height: 18px;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 50%;
    position: absolute;
    z-index: 1;
}

.selected { background-color: rgba(255, 255, 0, 0.5) !important; box-shadow: inset 0 0 15px rgba(255, 255, 0, 0.8); }
.in-check { background-color: rgba(255, 0, 0, 0.6) !important; animation: pulse-red 1s infinite; }

@keyframes pulse-red { 0% { opacity: 1; } 50% { opacity: 0.5; } 100% { opacity: 1; } }

.sidebar { width: 420px; display: flex; flex-direction: column; gap: 15px; }
.glass-panel { 
    background: rgba(255, 255, 255, 0.03); backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 15px; padding: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

#chat-container { 
    height: 380px; background: rgba(0,0,0,0.4); border-radius: 15px; border: 1px solid rgba(255,255,255,0.1);
    display: flex; flex-direction: column; overflow: hidden;
}

#chat-messages { flex-grow: 1; overflow-y: auto; padding: 15px; display: flex; flex-direction: column; gap: 8px; scroll-behavior: smooth; }

.msg { padding: 8px 14px; border-radius: 12px; font-size: 0.9em; max-width: 85%; animation: fadeIn 0.3s ease; }
.my-msg { align-self: flex-end; background: var(--primary); color: white; }
.other-msg { align-self: flex-start; background: #333; }
.system-msg { align-self: center; background: rgba(241, 196, 15, 0.1); color: var(--warning); border: 1px solid var(--warning); width: 90%; text-align: center; font-size: 0.8em; }

input, select, button { 
    background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.2); 
    color: white; padding: 10px; border-radius: 8px; transition: 0.2s;
}
input[type="color"] { padding: 2px; height: 35px; width: 50px; cursor: pointer; }
button { cursor: pointer; font-weight: bold; border: none; }
button:hover { background: rgba(255,255,255,0.15); transform: translateY(-1px); }
#send-chat { background: var(--success); }
.control-row { display: flex; gap: 10px; margin-top: 15px; }
.control-row button { flex: 1; }
#resignBtn { background: var(--danger); }

/* --- NEUE ADMIN & SYSTEM STYLES --- */
.msg-admin {
    align-self: center;
    background: rgba(220, 53, 69, 0.15);
    color: #ff4d4d;
    border: 2px solid var(--danger);
    font-weight: bold;
    text-transform: uppercase;
    width: 95%;
    text-align: center;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(220, 53, 69, 0.3);
    animation: flash-admin 2s infinite;
}

@keyframes flash-admin {
    0% { border-color: var(--danger); }
    50% { border-color: #ff8080; }
    100% { border-color: var(--danger); }
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }