@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;600;700&family=Syne:wght@400;600;700;800&display=swap');

    /* ── Reset ── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
        --bg:       #0a0a0f;
        --surface:  #111118;
        --panel:    #16161f;
        --border:   #1e1e2e;
        --muted:    #3a3a52;
        --text:     #e8e8f0;
        --subtle:   #6b6b8a;
        --accent:   #4f8ef7;
        --danger:   #f74f6a;
        --success:  #4ff7a8;
        --warn:     #f7c74f;
        --radius:   10px;
        --mono:     'JetBrains Mono', monospace;
        --display:  'Syne', sans-serif;
        --sidebar:  220px;
    }

    html, body {
        height: 100%;
        overflow: hidden;
        background: var(--bg);
        color: var(--text);
        font-family: var(--mono);
        font-size: 14px;
        -webkit-font-smoothing: antialiased;
    }

    /* ────────────────────────────────
    SCREEN SYSTEM
    ──────────────────────────────── */
    .screen {
        display: none;
        height: 100vh;
        width: 100%;
        overflow: auto;
    }
    .screen.active {
        display: flex;
    }

    /* ────────────────────────────────
    LOBBY SCREEN
    ──────────────────────────────── */
    #lobby-screen {
        flex-direction: row;
        align-items: stretch;
    }

    .lobby-container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        width: 100%;
        height: 100%;
        gap: 0;
    }

    .lobby-rules-panel {
        background: linear-gradient(135deg, var(--panel) 0%, var(--surface) 100%);
        padding: 48px 40px;
        overflow-y: auto;
        border-right: 1px solid var(--border);
        display: flex;
        flex-direction: column;
        gap: 32px;
    }

    .lobby-rules-panel::-webkit-scrollbar { width: 4px; }
    .lobby-rules-panel::-webkit-scrollbar-thumb { background: var(--muted); border-radius: 2px; }

    .rules-header {
        text-align: left;
    }

    .rules-header h1 {
        font-family: var(--display);
        font-size: 2.5rem;
        font-weight: 800;
        letter-spacing: -0.03em;
        color: var(--text);
        margin-bottom: 6px;
    }

    .tagline {
        font-size: 0.95rem;
        color: var(--subtle);
        letter-spacing: 0.08em;
        text-transform: uppercase;
    }

    .creator {
        font-size: 0.85rem;
        color: var(--subtle);
        margin-top: 4px;
        margin-left: 0px;
        letter-spacing: 0.05em;
        text-transform: uppercase;
    }

    .smiley {
        font-size: 1rem; 
        color: var(--accent);
        text-transform:none;
    }

    .rules-content {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .rules-content h2 {
        font-family: var(--display);
        font-size: 1.2rem;
        font-weight: 700;
        color: var(--accent);
        margin-bottom: 8px;
    }

    .rule-item {
        padding: 14px 0;
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .rule-item:last-child {
        border-bottom: none;
    }

    .rule-item h3 {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--text);
        margin-bottom: 6px;
    }

    .rule-item p {
        font-size: 0.82rem;
        line-height: 1.5;
        color: var(--subtle);
    }

    .highlight-green { color: var(--success); font-weight: 600; }
    .highlight-blue { color: var(--accent); font-weight: 600; }
    .highlight-gold { color: var(--warn); font-weight: 600; }
    .highlight-red { color: var(--danger); font-weight: 600; }

    .lobby-form-panel {
        background: var(--bg);
        padding: 48px 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow-y: auto;
    }

    .lobby-form-panel::-webkit-scrollbar { width: 4px; }
    .lobby-form-panel::-webkit-scrollbar-thumb { background: var(--muted); border-radius: 2px; }

    .join-form {
        width: 100%;
        max-width: 340px;
        display: flex;
        flex-direction: column;
        gap: 18px;
    }

    .form-section {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .form-section label {
        font-size: 0.82rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: var(--subtle);
    }

    input.input {
        width: 100%;
        padding: 0.75em 12px;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 8px;
        color: var(--text);
        font-family: var(--display);
        font-size: 0.95rem;
        transition: border-color 0.2s, box-shadow 0.2s;
    }

    input.input::placeholder { color: var(--muted); }
    input.input:focus { 
        border-color: var(--accent); 
        box-shadow: 0 0 8px rgba(79,142,247,0.25); 
        outline: none;
    }

    button.btn {
        cursor: pointer;
        outline: none;
        border: none;
        padding: 0.75em 1.2em;
        font-size: 0.95rem;
        font-weight: 600;
        border-radius: 8px;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        letter-spacing: 0.03em;
        font-family: var(--display);
    }

    .btn-icon {
        font-size: 1.1em;
    }

    button.btn-primary {
        background: var(--accent);
        color: #fff;
        box-shadow: 0 4px 12px rgba(79,142,247,0.3);
    }

    button.btn-primary:hover {
        background: #3d7fe8;
        box-shadow: 0 6px 16px rgba(79,142,247,0.4);
    }

    button.btn-primary:active { transform: scale(0.96); }

    button.btn-secondary {
        background: var(--surface);
        color: var(--text);
        border: 1px solid var(--border);
        box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    }

    button.btn-secondary:hover {
        border-color: var(--accent);
        background: rgba(79,142,247,0.08);
    }

    button.btn-secondary:active { transform: scale(0.96); }

    .form-divider {
        text-align: center;
        color: var(--subtle);
        font-size: 0.82rem;
        position: relative;
        margin: 8px 0;
    }

    .form-divider::before,
    .form-divider::after {
        content: '';
        position: absolute;
        top: 50%;
        width: 30%;
        height: 1px;
        background: var(--border);
    }

    .form-divider::before { left: 0; }
    .form-divider::after { right: 0; }

    .error-message {
        color: var(--danger);
        font-size: 0.82rem;
        text-align: center;
        min-height: 1.2em;
        margin-top: 8px;
    }

    /* Mobile: stack layout */
    @media (max-width: 768px) {
        .lobby-container {
            grid-template-columns: 1fr;
        }

        .lobby-rules-panel {
            border-right: none;
            border-bottom: 1px solid var(--border);
            padding: 32px 24px;
        }

        .rules-header h1 { font-size: 1.8rem; }

        .lobby-form-panel {
            padding: 32px 24px;
        }
    }

    /* ────────────────────────────────
    WAITING SCREEN
    ──────────────────────────────── */
    #waiting-screen {
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 16px;
        background: var(--bg);
        position: relative;
        overflow: hidden;
    }
    #waiting-screen::before {
        content: '';
        position: absolute;
        width: 600px; height: 600px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(79,142,247,0.06) 0%, transparent 70%);
        top: 50%; left: 50%;
        transform: translate(-50%,-50%);
        animation: bg-pulse 3s ease-in-out infinite;
        pointer-events: none;
    }
    @keyframes bg-pulse {
        0%,100% { transform: translate(-50%,-50%) scale(1);    opacity:.5; }
        50%     { transform: translate(-50%,-50%) scale(1.15); opacity:1;  }
    }
    #waiting-screen h2 {
        font-family: var(--display);
        font-size: 1.6rem; font-weight: 700;
        letter-spacing: -0.02em;
        color: var(--text);
        position: relative; z-index: 1;
    }
    #waiting-screen h1 {
        position: relative; z-index: 1;
    }
    #start-game-btn {
        margin-top: 16px;
    }
    #waiting-error {
        position: relative; z-index: 1;
    }
    .waiting-dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--accent);
        box-shadow: 0 0 12px var(--accent);
        animation: dot-pulse 1.4s ease-in-out infinite;
        position: relative; z-index: 1;
    }
    @keyframes dot-pulse {
        0%,100% { opacity:1; transform: scale(1); }
        50%     { opacity:.3; transform: scale(.5); }
    }
    #waiting-screen h1 {
        position: relative; z-index: 1;
    }

    /* ────────────────────────────────
    GAME SHELL
    ──────────────────────────────── */
    .game-container {
        flex-direction: column;
        background: var(--bg);
    }

    /* ── Header ── */
    header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 20px;
        height: 52px;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        flex-shrink: 0;
    }
    .timer-room {
        display: flex;
        align-items: center;
        gap: 24px;
    }
    .timer-room h2 {
        font-family: var(--display);
        font-size: 1.3rem; font-weight: 800;
        letter-spacing: -0.03em;
        color: var(--accent);
        min-width: 48px;
    }
    .timer-room h1 {
        font-size: 0.72rem; font-weight: 400;
        color: var(--subtle);
        letter-spacing: 0.08em;
        text-transform: uppercase;
    }
    .timer-room h1 span { color: var(--text); font-weight: 600; }

    .header-tag {
        font-size: 0.68rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--muted);
        padding: 4px 12px;
        border: 1px solid var(--border);
        border-radius: 20px;
    }

    /* ── 3-column content area ── */
    .content {
        flex: 1;
        display: grid;
        grid-template-columns: var(--sidebar) 1fr var(--sidebar);
        gap: 12px;
        padding: 12px;
        overflow: hidden;
        min-height: 0;
    }

    /* ────────────────────────────────
    LEFT SIDEBAR — PLAYERS
    ──────────────────────────────── */
    #players-panel {
        display: flex;
        flex-direction: column;
        background: var(--panel);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        min-height: 0;
    }

    .panel-header {
        padding: 9px 12px;
        border-bottom: 1px solid var(--border);
        font-size: 0.62rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--subtle);
        flex-shrink: 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .panel-header .player-count {
        background: var(--border);
        color: var(--subtle);
        font-size: 0.6rem;
        padding: 2px 7px;
        border-radius: 10px;
    }

    #player-list {
        flex: 1;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 8px;
        display: flex;
        flex-direction: column;
        gap: 6px;
        scrollbar-width: thin;
        scrollbar-color: var(--muted) transparent;
        min-height: 0;
    }
    #player-list::-webkit-scrollbar { width: 3px; }
    #player-list::-webkit-scrollbar-thumb { background: var(--muted); border-radius: 2px; }

    /* Individual player card */
    .player-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 9px 10px;
        display: flex;
        flex-direction: column;
        gap: 6px;
        transition: border-color 0.2s;
    }
    .player-card.is-infected {
        border-color: rgba(247,79,106,0.35);
        background: rgba(247,79,106,0.04);
    }

    .player-card-top {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .player-info {
        flex: 1;
        min-width: 0;
    }
    .player-name {
        font-size: 0.78rem;
        font-weight: 600;
        color: var(--text);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1;
        margin-bottom: 2px;
    }
    .player-score {
        font-size: 0.62rem;
        color: var(--subtle);
    }
    .player-score span { color: var(--warn); font-weight: 600; }



    /* ────────────────────────────────
    CENTER — GRID
    ──────────────────────────────── */
    #grid-wrapper {
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--panel);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 12px;
        min-width: 0;
        min-height: 0;
    }

    #grid {
        /* Fit a perfect square inside the wrapper */
        width: 100%;
        height: 100%;
        aspect-ratio: 1;
        display: grid;
        grid-template-columns: repeat(15, 1fr);
        grid-template-rows:    repeat(15, 1fr);
        gap: 2px;
    }

    .cell {
        border-radius: 3px;
        background: var(--surface);
        border: 1px solid var(--border);
        transition: background 0.2s ease, box-shadow 0.2s ease;
        position: relative;
    }
    @keyframes player-idle {
    0% {
        box-shadow: 0 0 4px rgba(255, 255, 255, 0.12);
    }
    50% {
        box-shadow: 0 0 8px rgba(255, 255, 255, 0.22);
    }
    100% {
        box-shadow: 0 0 4px rgba(255, 255, 255, 0.12);
    }
}

.cell.player:not(.infected):not(.shielded):not(.frozen) {
    animation: player-idle 2.2s infinite ease-in-out;
}
    .cell.player {
    text-align: center;
    background: rgba(255, 255, 255, 0.04);
    border: 2px solid rgba(255, 255, 255, 0.55);
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.15);
    position: relative;
}
    @keyframes infected-pulse {
        0% {
            box-shadow: 0 0 4px rgba(247,79,106,0.4),
                        0 0 8px rgba(247,79,106,0.2);
        }
        50% {
            box-shadow: 0 0 10px rgba(247,79,106,0.85),
                        0 0 16px rgba(247,79,106,0.45);
        }
        100% {
            box-shadow: 0 0 4px rgba(247,79,106,0.4),
                        0 0 8px rgba(247,79,106,0.2);
        }
    }
    .cell.infected {
    background-color: rgba(247,79,106,0.15);
    border: 2px solid rgba(247,79,106,0.6);
    animation: infected-pulse 1.2s infinite ease-in-out;
    }
    .cell.shield {
    background: rgba(79, 247, 168, 0.18);
    border: 2px solid rgba(79, 247, 168, 0.5);
    box-shadow: 0 0 8px rgba(79, 247, 168, 0.4);
    position: relative;
}
    @keyframes shield-pulse {
    0% {
        box-shadow: 0 0 4px rgba(79, 247, 168, 0.4),
                    0 0 8px rgba(79, 247, 168, 0.2);
    }
    50% {
        box-shadow: 0 0 10px rgba(79, 247, 168, 0.85),
                    0 0 16px rgba(79, 247, 168, 0.45);
    }
    100% {
        box-shadow: 0 0 4px rgba(79, 247, 168, 0.4),
                    0 0 8px rgba(79, 247, 168, 0.2);
    }
}
    /* visual indicator when a player has active shield */
    /* Shield activated players */
    .cell.shielded {
    background-color: rgba(79, 247, 168, 0.15);
    border: 2px solid rgba(79, 247, 168, 0.5);
    animation: shield-pulse 1.2s infinite ease-in-out;
}  
@keyframes freeze-pulse {
    0% {
        box-shadow: 0 0 4px rgba(79, 166, 247, 0.35),
                    0 0 8px rgba(79, 166, 247, 0.2);
    }
    50% {
        box-shadow: 0 0 10px rgba(79, 166, 247, 0.85),
                    0 0 16px rgba(79, 166, 247, 0.45);
    }
    100% {
        box-shadow: 0 0 4px rgba(79, 166, 247, 0.35),
                    0 0 8px rgba(79, 166, 247, 0.2);
    }
} 
    /* when infected players are frozen */
    .cell.frozen {
    background-color: rgba(79, 166, 247, 0.15);
    border: 2px solid rgba(79, 166, 247, 0.7);
    filter: saturate(0.9) brightness(1.05);
    animation: freeze-pulse 1.2s infinite ease-in-out;
}
    .cell.shield::before {
        content: '✦';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        font-size: 16px;
        color: #4ff7a8; /* green shield symbol */
    }
    .cell.freeze {
    background: rgba(79, 166, 247, 0.18);
    border: 2px solid rgba(79, 166, 247, 0.75);
    box-shadow: 0 0 8px rgba(79, 166, 247, 0.4);
    position: relative;
}
    .cell.freeze::before {
        content: '❄';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        font-size: 16px;
        color: #4faef7; /* blue freeze symbol */
    }
   /* ── Score Booster collectible ── */
.cell.score_booster {
    background: transparent;
    border: 2px solid rgba(247, 199, 79, 0.6);   /* golden border */
    box-shadow: 0 0 6px rgba(247, 199, 79, 0.4); /* soft glow */
    position: relative;
}

.cell.score_booster::before {
    content: "★";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 16px;
    color: #f7c74f; /* same as --warn */
}

    /* ────────────────────────────────
    RIGHT SIDEBAR — CHAT
    ──────────────────────────────── */
    #chat-container {
        display: flex;
        flex-direction: column;
        background: var(--panel);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        min-height: 0;
    }

    .chat-header {
        padding: 9px 12px;
        border-bottom: 1px solid var(--border);
        font-size: 0.62rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--subtle);
        flex-shrink: 0;
    }

    #chat-log {
        flex: 1;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 10px;
        display: flex;
        flex-direction: column;
        gap: 5px;
        scrollbar-width: thin;
        scrollbar-color: var(--muted) transparent;
        min-height: 0;
    }
    #chat-log::-webkit-scrollbar { width: 3px; }
    #chat-log::-webkit-scrollbar-thumb { background: var(--muted); border-radius: 2px; }

    #chat-log .message {
        padding: 6px 9px;
        border-radius: 6px;
        font-size: 0.78rem;
        line-height: 1.45;
        word-break: break-word;
        background: var(--surface);
        border: 1px solid var(--border);
        color: var(--subtle);
    }
    #chat-log .message.player {
        background: rgba(79,142,247,0.08);
        border-color: rgba(79,142,247,0.2);
        color: var(--text);
    }
    #chat-log .message.infected {
        background: rgba(247,79,106,0.08);
        border-color: rgba(247,79,106,0.2);
        color: var(--text);
    }

    #chat-input {
        display: flex;
        gap: 6px;
        padding: 8px;
        border-top: 1px solid var(--border);
        background: var(--surface);
        flex-shrink: 0;
    }
    #chat-input input {
        flex: 1;
        padding: 7px 10px;
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: 6px;
        color: var(--text);
        font-family: var(--mono);
        font-size: 0.78rem;
        outline: none;
        transition: border-color 0.2s;
        min-width: 0;
    }
    #chat-input input::placeholder { color: var(--muted); }
    #chat-input input:focus { border-color: var(--accent); }

    #chat-input button {
        padding: 7px 12px;
        background: var(--accent);
        border: none;
        border-radius: 6px;
        color: #fff;
        font-family: var(--mono);
        font-size: 0.72rem;
        font-weight: 600;
        letter-spacing: 0.04em;
        cursor: pointer;
        transition: opacity 0.2s, transform 0.1s;
        flex-shrink: 0;
    }
    #chat-input button:hover  { opacity: 0.85; }
    #chat-input button:active { transform: scale(0.97); }

    /* ────────────────────────────────
    RESULT SCREEN
    ──────────────────────────────── */
    #result-screen {
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 20px;
        background: var(--bg);
        position: relative;
        overflow: hidden;
    }
    #result-screen::before {
        content: '';
        position: absolute;
        width: 500px; height: 500px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(247,79,106,0.07) 0%, transparent 70%);
        top: 50%; left: 50%;
        transform: translate(-50%,-50%);
    }
    #result-screen h2 {
        font-family: var(--display);
        font-size: 2.8rem; font-weight: 800;
        letter-spacing: -0.03em;
        color: var(--success);
        position: relative; z-index: 1;
        margin-bottom: 20px;
    }
    #result-data {
        position: relative;
        z-index: 1;
        background: var(--panel);
        border: none;
        border-radius: var(--radius);
        padding: 24px 32px;
        font-family: var(--mono);
        font-size: 0.85rem;
        color: var(--subtle);
        line-height: 1.8;
        max-width: 480px;
        width: 90%;
        overflow-x: auto;
        box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }

    /* Lobby buttons container */
    #lobby-buttons {
        /* styles now in .join-form */
    }

    #game-screen {
        /* game screen now uses .screen system */
    }

    .content {
        flex: 1;
        display: grid;
        grid-template-columns: var(--sidebar) 1fr var(--sidebar);
        gap: 12px;
        padding: 12px;
        overflow: hidden;
        min-height: 0;
    }


/* ────────────────────────────────
NOTIFICATIONS
──────────────────────────────── */
.notification {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px 30px;
    border-radius: 8px;
    font-weight: bold;
    z-index: 1000;
    animation: notification-pop 0.3s ease-out;
}

@keyframes notification-pop {
    0% { transform: translate(-50%, -50%) scale(0.8); opacity: 0; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

.notification.round-start {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 0 20px rgba(79, 142, 247, 0.6);
}

.notification.no-players-found {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 0 20px rgba(79, 142, 247, 0.6);
}

/* ── Top-of-screen toast base (overrides centered .notification) ── */
.notification.freeze-activated,
.notification.shield-activated,
.notification.proximity-infected,
.notification.red-wall-infected {
    top: 10%;
    left: 50%;
    transform: translate(-50%, 0);
    padding: 10px 18px;
    font-size: 14px;
    border-radius: 6px;
    animation: notification-slide-down 0.3s ease-out;
}

@keyframes notification-slide-down {
    from { transform: translate(-50%, -16px); opacity: 0; }
    to   { transform: translate(-50%, 0);     opacity: 1; }
}

.notification.freeze-activated {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 0 20px rgba(79, 142, 247, 0.6);
}

/* Shield — only shown to the player who collected it */
.notification.shield-activated {
    background: var(--success);
    color: var(--bg);
    box-shadow: 0 0 20px rgba(79, 247, 168, 0.6);
}

/* Proximity infection — only shown to the player who got infected */
.notification.proximity-infected {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 0 20px rgba(247, 79, 106, 0.7);
}

/* Red wall — shown to all players */
.notification.red-wall-infected {
    background: #8b0000;
    color: #fff;
    box-shadow: 0 0 20px rgba(139, 0, 0, 0.7);
}

/* ── Healthy player with active shield ── */
.cell.player.shielded {
    background-color: rgba(79, 247, 168, 0.2); /* green transparent overlay */
    border: 2px solid rgba(79, 247, 168, 0.8); /* optional bright border */
    box-shadow: 0 0 6px rgba(79, 247, 168, 0.5);
}

/* ── Player frozen ── */
.cell.player.frozen {
    background-color: rgba(79, 166, 247, 0.2); /* blue transparent overlay */
    border: 2px solid rgba(79, 166, 247, 0.6);
    box-shadow: 0 0 6px rgba(79, 166, 247, 0.4);
}

/* Pulsing green glow around the player */
@keyframes shield-glow {
    0%   { box-shadow: 0 0 5px 2px rgba(79, 247, 168, 0.5); }
    100% { box-shadow: 0 0 15px 6px rgba(79, 247, 168, 0.8); }
}

/* Red wall collectible */
.cell.red_wall {
    background-color: #b3000083;
    box-shadow: inset 0 0 10px #ff0000;
}

.cell.red_wall::after {
    content: "⚠︎";
    color: white;
    font-size: 18px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.cell.player {
    text-align: center;
}
#result-screen::before {
    z-index: 0;               /* behind content */
    pointer-events: none;     /* allows clicks to pass through */
}
#result-screen > * {
    position: relative;       /* ensure content is above the pseudo-element */
    z-index: 1;
}
/* ── Notification toasts ── */
.notification.shield-activated,
.notification.proximity-infected,
.notification.red-wall-infected {
    top: 8%;
    left: 50%;
    transform: translate(-50%, 0);
    padding: 10px 20px;
    font-size: 14px;
    font-weight: bold;
    border-radius: 6px;
    animation: toast-slide-in 0.3s ease-out;
}
@keyframes toast-slide-in {
    from { opacity: 0; transform: translate(-50%, -12px); }
    to   { opacity: 1; transform: translate(-50%, 0); }
}
.notification.shield-activated {
    background: var(--success);
    color: var(--bg);
    box-shadow: 0 0 18px rgba(79, 247, 168, 0.6);
}
.notification.proximity-infected {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 0 18px rgba(247, 79, 106, 0.7);
}
.notification.red-wall-infected {
    background: #8b0000;
    color: #fff;
    box-shadow: 0 0 18px rgba(180, 0, 0, 0.7);
}