:root {
            --green:   #39ff14;
            --amber:   #ffb000;
            --red:     #ff3c3c;
            --cyan:    #00eeff;
            --dim:     #1a2a1a;
            --bg:      #040a04;
            --gold:    #ffd700;
            --purple:  #cc44ff;
        }

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

        body {
            background: var(--bg);
            color: var(--green);
            font-family: 'Share Tech Mono', 'Courier New', monospace;
            font-size: 14px;
            height: 100dvh;
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        /* ── CRT effects ── */
        body::before {
            content: '';
            position: fixed; inset: 0;
            background: repeating-linear-gradient(
                0deg,
                transparent,
                transparent 2px,
                rgba(0,0,0,.07) 2px,
                rgba(0,0,0,.07) 4px
            );
            pointer-events: none;
            z-index: 9000;
        }
        body::after {
            content: '';
            position: fixed; inset: 0;
            background: radial-gradient(ellipse at center,
                transparent 60%, rgba(0,0,0,.65) 100%);
            pointer-events: none;
            z-index: 9001;
        }

        /* ── Header ── */
        #bbs-header {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: .5rem 1rem;
            border-bottom: 1px solid var(--green);
            background: rgba(0,20,0,.8);
            flex-shrink: 0;
        }
        #bbs-logo {
            font-family: 'VT323', monospace;
            font-size: 1.6rem;
            color: var(--green);
            letter-spacing: 2px;
            text-shadow: 0 0 8px var(--green);
        }
        #bbs-sub {
            font-size: .75rem;
            color: #336633;
            flex: 1;
        }
        #bbs-online {
            font-size: .8rem;
            color: var(--amber);
        }
        #bbs-back {
            font-family: 'VT323', monospace;
            font-size: 1rem;
            background: none;
            border: 1px solid #336633;
            color: #336633;
            padding: .2rem .6rem;
            cursor: pointer;
            text-decoration: none;
        }
        #bbs-back:hover { color: var(--green); border-color: var(--green); }

        #bbs-username {
            font-size: .8rem;
            color: var(--cyan);
            padding: .2rem .6rem;
            border: 1px solid #005566;
        }

        /* ── Messages area ── */
        #chat-log {
            flex: 1;
            overflow-y: auto;
            padding: .75rem 1rem;
            display: flex;
            flex-direction: column;
            gap: .25rem;
            scroll-behavior: smooth;
        }

        #chat-log::-webkit-scrollbar { width: 6px; }
        #chat-log::-webkit-scrollbar-track { background: var(--dim); }
        #chat-log::-webkit-scrollbar-thumb { background: #336633; }

        .msg {
            line-height: 1.5;
            word-break: break-word;
            animation: fadeIn .2s ease;
        }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; } }

        .msg-ts {
            color: #2a5a2a;
            font-size: .75rem;
            margin-right: .4rem;
        }
        .msg-user {
            color: var(--cyan);
            margin-right: .3rem;
        }
        .msg-user.me { color: var(--gold); }
        .msg-text { color: #c8e8c8; }

        /* system messages */
        .msg.system { color: #336633; font-size: .8rem; font-style: italic; }

        /* logro messages */
        .msg.logro .msg-text {
            color: var(--gold);
        }
        .msg.logro::before {
            content: '🏆 ';
        }
        .msg.logro .msg-game {
            color: #886622;
            font-size: .75rem;
            margin-left: .4rem;
        }

        /* history separator */
        .history-sep {
            text-align: center;
            color: #224422;
            font-size: .75rem;
            border-top: 1px solid #1a3a1a;
            padding-top: .4rem;
            margin: .25rem 0;
        }

        /* ── Input row ── */
        #chat-input-row {
            display: flex;
            align-items: center;
            gap: .5rem;
            padding: .5rem 1rem;
            border-top: 1px solid #1a3a1a;
            background: rgba(0,20,0,.8);
            flex-shrink: 0;
        }
        #chat-prompt {
            color: var(--green);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        #chat-input {
            flex: 1;
            background: none;
            border: none;
            border-bottom: 1px solid #336633;
            color: var(--green);
            font-family: inherit;
            font-size: 14px;
            outline: none;
            padding: .2rem 0;
        }
        #chat-input::placeholder { color: #2a5a2a; }
        #chat-input:focus { border-color: var(--green); }
        #chat-send {
            font-family: 'VT323', monospace;
            font-size: 1.1rem;
            background: none;
            border: 1px solid #336633;
            color: var(--green);
            padding: .2rem .8rem;
            cursor: pointer;
        }
        #chat-send:hover { background: rgba(57,255,20,.08); }

        /* ── Status bar ── */
        #status-bar {
            padding: .2rem 1rem;
            font-size: .7rem;
            color: #224422;
            border-top: 1px solid #112211;
            flex-shrink: 0;
        }

        /* ── Auth modal ── */
        #auth-overlay {
            position: fixed; inset: 0;
            background: rgba(0,0,0,.75);
            display: flex; align-items: center; justify-content: center;
            z-index: 8000;
        }
        #auth-overlay.hidden { display: none; }
        #auth-box {
            background: #060e06;
            border: 1px solid var(--green);
            padding: 1.5rem 2rem;
            width: min(90vw, 360px);
            box-shadow: 0 0 30px rgba(57,255,20,.15);
        }
        #auth-box h2 {
            font-family: 'VT323', monospace;
            font-size: 1.4rem;
            color: var(--green);
            margin-bottom: 1rem;
        }
        .auth-label {
            display: block;
            font-size: .7rem;
            color: #336633;
            margin: .6rem 0 .2rem;
        }
        .auth-input {
            width: 100%;
            background: rgba(57,255,20,.05);
            border: 1px solid #336633;
            color: var(--green);
            font-family: inherit;
            font-size: 13px;
            padding: .4rem .6rem;
            outline: none;
        }
        .auth-input:focus { border-color: var(--green); }
        #auth-submit {
            margin-top: 1rem;
            width: 100%;
            font-family: 'VT323', monospace;
            font-size: 1.1rem;
            background: none;
            border: 1px solid var(--green);
            color: var(--green);
            padding: .4rem;
            cursor: pointer;
        }
        #auth-submit:hover { background: rgba(57,255,20,.08); }
        #auth-skip {
            display: block;
            text-align: center;
            margin-top: .7rem;
            font-size: .75rem;
            color: #336633;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
        }
        #auth-skip:hover { color: var(--green); }
        #auth-err {
            color: var(--red);
            font-size: .75rem;
            margin-top: .5rem;
            min-height: 1rem;
        }

        /* responsive */
        @media (max-width: 480px) {
            #bbs-sub { display: none; }
            body { font-size: 13px; }
        }