:root {
    --bg: #07070a;
    --bg2: #0c0c12;
    --bg3: #10101a;
    --border: #18182a;
    --border2: #222238;
    --text: #7a7a96;
    --text2: #4e4e66;
    --bright: #c8c8dd;
    --accent: #4e7fff;
    --accent2: rgba(78, 127, 255, 0.08);
    --accent3: rgba(78, 127, 255, 0.18);
    --accent4: rgba(78, 127, 255, 0.35);
    --red: #d94452;
    --red2: rgba(217, 68, 82, 0.08);
    --yellow: #c9a830;
    --yellow2: rgba(201, 168, 48, 0.08);
    --teal: #38b2a0;
    --teal2: rgba(56, 178, 160, 0.08);
    --mono: 'IBM Plex Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
::selection { background: var(--accent); color: #fff; }
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); }

body {
    font-family: var(--mono);
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    min-height: 100vh;
    font-size: 13px;
    line-height: 1.5;
}

.scanlines {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9000;
    background: repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(0,0,0,0.01) 3px, rgba(0,0,0,0.01) 6px);
}

.boot {
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    transition: opacity 0.5s, visibility 0.5s;
}
.boot.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.boot-inner { max-width: 380px; width: 100%; }
.boot-log {
    font-size: 0.72rem;
    color: var(--text2);
    min-height: 60px;
    margin-bottom: 1rem;
}
.boot-log .line { opacity: 0; animation: li 0.15s forwards; margin-bottom: 2px; }
.boot-log .hi { color: var(--accent); }
@keyframes li { to { opacity: 1; } }
.boot-bar { width: 100%; height: 1px; background: var(--border); overflow: hidden; }
.boot-fill { height: 100%; width: 0%; background: var(--accent); transition: width 0.15s; }

.app {
    position: relative;
    z-index: 1;
    opacity: 0;
    transition: opacity 0.5s;
    min-height: 100vh;
}
.app.visible { opacity: 1; }

.nav {
    position: fixed;
    top: 0; left: 0; width: 100%;
    height: 42px;
    background: rgba(7,7,10,0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    z-index: 100;
}
.nav-brand { font-size: 0.78rem; color: var(--bright); font-weight: 500; }
.nav-links { display: flex; gap: 1.25rem; }
.nav-link {
    font-size: 0.72rem;
    color: var(--text2);
    cursor: pointer;
    transition: color 0.15s;
    user-select: none;
}
.nav-link:hover, .nav-link.active { color: var(--accent); }

.view { display: none; padding: 58px 1.25rem 2rem; }
.view.active { display: block; animation: fi 0.3s ease; }
@keyframes fi { from { opacity: 0; } to { opacity: 1; } }

.lobby { max-width: 520px; margin: 0 auto; }
.lobby-hint { font-size: 0.7rem; color: var(--text2); margin-bottom: 1.25rem; }

.game-list { display: flex; flex-direction: column; gap: 1px; }

.game-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1rem;
    background: var(--bg2);
    border-left: 2px solid transparent;
    cursor: pointer;
    transition: all 0.15s;
}
.game-card:hover {
    background: var(--bg3);
    border-left-color: var(--accent);
}
.card-left { min-width: 0; }
.card-name { font-size: 0.8rem; font-weight: 500; color: var(--bright); margin-bottom: 2px; }
.card-desc { font-size: 0.66rem; color: var(--text2); line-height: 1.45; }
.card-btn {
    background: transparent;
    border: 1px solid var(--border2);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.68rem;
    padding: 0.3rem 0.9rem;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
    margin-left: 1rem;
}
.card-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

.game-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
}
.back-btn {
    background: none; border: none; color: var(--text2);
    font-family: var(--mono); font-size: 0.7rem; cursor: pointer; padding: 0;
    transition: color 0.15s;
}
.back-btn:hover { color: var(--accent); }
.game-label { font-size: 0.75rem; color: var(--bright); font-weight: 500; }
.game-stats { display: flex; gap: 1.25rem; font-size: 0.7rem; color: var(--text2); }
.gstat span { color: var(--accent); font-weight: 500; }
#gameTimer { color: var(--yellow); }

.tutorial, .gameover, .win-overlay {
    position: fixed; inset: 0;
    background: rgba(7,7,10,0.92);
    backdrop-filter: blur(4px);
    z-index: 50;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
}
.tutorial.show, .gameover.show, .win-overlay.show { display: flex; }

.tut-inner, .go-inner { max-width: 400px; width: 100%; }
.tut-title { font-size: 1rem; font-weight: 500; color: var(--bright); margin-bottom: 1.25rem; }
.tut-steps { margin-bottom: 1.25rem; }
.t-step { display: flex; gap: 0.6rem; margin-bottom: 0.6rem; }
.t-n { font-size: 0.65rem; color: var(--accent); font-weight: 500; min-width: 16px; padding-top: 1px; }
.t-t { font-size: 0.73rem; color: var(--text); line-height: 1.5; }
.t-t strong { color: var(--accent); font-weight: 500; }

.btn-go {
    padding: 0.5rem 1.5rem;
    background: var(--accent);
    color: #fff;
    font-family: var(--mono);
    font-size: 0.73rem;
    font-weight: 500;
    border: none;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.15s;
}
.btn-go:hover { filter: brightness(1.15); }
.btn-sec {
    padding: 0.5rem 1.5rem;
    background: transparent;
    color: var(--text2);
    font-family: var(--mono);
    font-size: 0.73rem;
    border: 1px solid var(--border2);
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.15s;
}
.btn-sec:hover { border-color: var(--accent); color: var(--accent); }

.go-label { font-size: 0.68rem; color: var(--text2); margin-bottom: 0.4rem; }
.go-score { font-size: 1.1rem; color: var(--bright); margin-bottom: 0.2rem; }
.go-score span { color: var(--accent); font-weight: 600; }
.go-level { font-size: 0.75rem; color: var(--text2); margin-bottom: 1.25rem; }
.go-level span { color: var(--accent); }
.go-btns { display: flex; gap: 0.6rem; }
.win-label { font-size: 0.9rem; color: var(--accent); margin-bottom: 0.5rem; font-weight: 500; }

.score-block {
    margin-bottom: 0.75rem;
    background: var(--bg2);
    overflow: hidden;
}
.score-hd {
    padding: 0.6rem 0.9rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--bright);
    font-weight: 500;
}
.score-row {
    display: grid;
    grid-template-columns: 30px 1fr 50px 70px;
    padding: 0.4rem 0.9rem;
    font-size: 0.7rem;
    border-bottom: 1px solid var(--border);
    align-items: center;
}
.score-row:last-child { border-bottom: none; }
.s-rank { color: var(--text2); }
.s-date { color: var(--text2); font-size: 0.64rem; }
.s-lv { color: var(--accent); text-align: center; font-size: 0.68rem; }
.s-val { color: var(--accent); text-align: right; font-weight: 500; }
.score-empty { padding: 0.8rem 0.9rem; font-size: 0.7rem; color: var(--text2); }

.arena { max-width: 640px; margin: 0 auto; min-height: 300px; }

.mem-grid { display: grid; gap: 5px; max-width: 400px; margin: 0 auto; }
.mem-cell {
    aspect-ratio: 1;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
    color: var(--text2);
}
.mem-cell.revealed { background: var(--accent2); border-color: var(--accent3); color: var(--accent); }
.mem-cell.matched { background: var(--accent2); border-color: var(--accent3); color: var(--accent); opacity: 0.35; pointer-events: none; }
.mem-cell.wrong { background: var(--red2); border-color: rgba(217,68,82,0.3); color: var(--red); animation: shk 0.3s; }
@keyframes shk { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

.pkt-area {
    position: relative;
    width: 100%; max-width: 480px;
    height: 400px;
    margin: 0 auto;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 2px;
    overflow: hidden;
}
.pkt {
    position: absolute;
    width: 28px; height: 28px;
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    font-weight: 500;
}
.pkt.safe { background: var(--accent2); border: 1px solid var(--accent3); color: var(--accent); }
.pkt.mal { background: var(--red2); border: 1px solid rgba(217,68,82,0.25); color: var(--red); }
.pkt.bonus { background: var(--yellow2); border: 1px solid rgba(201,168,48,0.25); color: var(--yellow); }
.pkt-recv {
    position: absolute;
    bottom: 6px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    box-shadow: 0 0 8px var(--accent4);
    transition: left 0.03s linear;
}
.pkt-lives { position: absolute; top: 6px; right: 8px; font-size: 0.7rem; color: var(--red); }

.cb-wrap { max-width: 340px; margin: 0 auto; }
.cb-slots { display: flex; gap: 8px; justify-content: center; margin-bottom: 1.25rem; }
.cb-slot {
    width: 42px; height: 50px;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--bright);
}
.cb-nums { display: flex; gap: 4px; justify-content: center; margin-bottom: 0.6rem; flex-wrap: wrap; }
.cb-n {
    width: 32px; height: 32px;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--bright);
    font-family: var(--mono);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.12s;
    display: flex; align-items: center; justify-content: center;
}
.cb-n:hover { border-color: var(--accent); color: var(--accent); }
.cb-acts { display: flex; gap: 0.4rem; justify-content: center; margin-bottom: 1.25rem; }
.cb-sub {
    padding: 0.4rem 1.2rem;
    background: var(--accent); color: #fff;
    border: none; font-family: var(--mono); font-size: 0.72rem; font-weight: 500;
    border-radius: 2px; cursor: pointer; transition: all 0.15s;
}
.cb-sub:hover { filter: brightness(1.15); }
.cb-clr {
    padding: 0.4rem 0.9rem;
    background: transparent; color: var(--text2);
    border: 1px solid var(--border); font-family: var(--mono); font-size: 0.72rem;
    border-radius: 2px; cursor: pointer; transition: all 0.12s;
}
.cb-clr:hover { border-color: var(--red); color: var(--red); }
.cb-hist { max-height: 200px; overflow-y: auto; }
.cb-row { display: flex; align-items: center; justify-content: center; gap: 0.6rem; padding: 0.4rem; border-bottom: 1px solid var(--border); }
.cb-digs { display: flex; gap: 4px; }
.cb-d {
    width: 26px; height: 26px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 2px; font-size: 0.78rem; font-weight: 500;
}
.cb-d.exact { background: var(--accent2); border: 1px solid var(--accent3); color: var(--accent); }
.cb-d.partial { background: var(--yellow2); border: 1px solid rgba(201,168,48,0.25); color: var(--yellow); }
.cb-d.miss { background: var(--bg); border: 1px solid var(--border); color: var(--text2); }
.cb-hint { color: var(--text2); font-size: 0.62rem; }

.sig-grid { display: grid; gap: 8px; margin: 0 auto; }
.sig-node {
    aspect-ratio: 1;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.6rem; color: var(--text2);
    cursor: pointer; transition: all 0.2s; user-select: none;
}
.sig-node.lit { background: var(--accent2); border-color: var(--accent); color: var(--accent); box-shadow: 0 0 12px var(--accent4); }
.sig-node.bad { background: var(--red2); border-color: var(--red); color: var(--red); box-shadow: 0 0 12px rgba(217,68,82,0.3); }
.sig-node.ok { background: var(--accent2); border-color: var(--accent3); color: var(--accent); }
.sig-msg { text-align: center; font-size: 0.72rem; color: var(--text2); margin-top: 1rem; }
.sig-msg.go { color: var(--accent); }

.bit-wrap { max-width: 400px; margin: 0 auto; text-align: center; }
.bit-target { font-size: 1.6rem; font-weight: 600; color: var(--yellow); margin-bottom: 0.2rem; }
.bit-lbl { font-size: 0.62rem; color: var(--text2); margin-bottom: 1.25rem; }
.bit-row { display: flex; gap: 4px; justify-content: center; margin-bottom: 0.3rem; }
.bit-cell {
    width: 42px; height: 48px;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 2px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; font-weight: 500; color: var(--bright);
    cursor: pointer; transition: all 0.12s; user-select: none;
}
.bit-cell.on { background: var(--accent2); border-color: var(--accent3); color: var(--accent); }
.bit-wts { display: flex; gap: 4px; justify-content: center; margin-bottom: 1.25rem; }
.bit-wt { width: 42px; font-size: 0.52rem; color: var(--text2); text-align: center; }
.bit-cur { font-size: 1rem; font-weight: 500; color: var(--bright); }
.bit-cur.ok { color: var(--accent); }
.bit-cur-lbl { font-size: 0.62rem; color: var(--text2); }

.rx-wrap { max-width: 400px; margin: 0 auto; text-align: center; }
.rx-prompt { font-size: 0.9rem; color: var(--bright); margin-bottom: 0.3rem; font-weight: 500; }
.rx-hint { font-size: 0.65rem; color: var(--text2); margin-bottom: 1.5rem; }
.rx-input {
    width: 100%; padding: 0.6rem 0.8rem;
    background: var(--bg2); border: 1px solid var(--border);
    border-radius: 2px; color: var(--bright);
    font-family: var(--mono); font-size: 0.85rem;
    outline: none; transition: border-color 0.15s;
    margin-bottom: 0.6rem;
    text-align: center;
}
.rx-input:focus { border-color: var(--accent); }
.rx-result { font-size: 0.78rem; min-height: 1.2em; margin-bottom: 1rem; }
.rx-result.correct { color: var(--accent); }
.rx-result.wrong { color: var(--red); }
.rx-score-info { font-size: 0.68rem; color: var(--text2); }

.wrd-wrap { max-width: 440px; margin: 0 auto; text-align: center; }
.wrd-letters { display: flex; gap: 5px; justify-content: center; margin-bottom: 1.25rem; flex-wrap: wrap; }
.wrd-l {
    width: 36px; height: 42px;
    background: var(--bg2); border: 1px solid var(--border); border-radius: 2px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; font-weight: 500; color: var(--bright);
    text-transform: lowercase;
}
.wrd-l.found { background: var(--accent2); border-color: var(--accent3); color: var(--accent); }
.wrd-l.blank { color: var(--text2); }
.wrd-input {
    width: 100%; max-width: 280px; padding: 0.5rem 0.8rem;
    background: var(--bg2); border: 1px solid var(--border); border-radius: 2px;
    color: var(--bright); font-family: var(--mono); font-size: 0.85rem;
    outline: none; text-align: center; margin-bottom: 0.5rem;
}
.wrd-input:focus { border-color: var(--accent); }
.wrd-hint { font-size: 0.68rem; color: var(--text2); margin-bottom: 0.5rem; }
.wrd-wrong { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 1rem; }
.wrd-w { font-size: 0.72rem; color: var(--red); }
.wrd-lives { font-size: 0.72rem; color: var(--text2); margin-bottom: 0.5rem; }
.wrd-lives span { color: var(--red); }

.aim-area {
    position: relative;
    width: 100%; max-width: 500px;
    height: 380px;
    margin: 0 auto;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 2px;
    overflow: hidden;
    cursor: crosshair;
}
.aim-target {
    position: absolute;
    border-radius: 50%;
    background: var(--accent2);
    border: 1px solid var(--accent3);
    transition: none;
    cursor: crosshair;
}
.aim-target.decoy {
    background: var(--red2);
    border-color: rgba(217,68,82,0.25);
}
.aim-info {
    text-align: center;
    font-size: 0.72rem;
    color: var(--text2);
    margin-top: 0.75rem;
}

.math-wrap { max-width: 380px; margin: 0 auto; text-align: center; }
.math-problem { font-size: 1.5rem; color: var(--bright); font-weight: 500; margin-bottom: 1rem; }
.math-input {
    width: 140px; padding: 0.5rem;
    background: var(--bg2); border: 1px solid var(--border); border-radius: 2px;
    color: var(--bright); font-family: var(--mono); font-size: 1rem;
    outline: none; text-align: center; margin-bottom: 0.75rem;
}
.math-input:focus { border-color: var(--accent); }
.math-fb { font-size: 0.78rem; min-height: 1.2em; margin-bottom: 0.5rem; }
.math-fb.ok { color: var(--accent); }
.math-fb.no { color: var(--red); }
.math-streak { font-size: 0.68rem; color: var(--text2); }

@media (max-width: 600px) {
    .nav { padding: 0 0.75rem; }
    .view { padding: 50px 0.75rem 1rem; }
    .game-stats { gap: 0.7rem; font-size: 0.65rem; }
    .game-bar { flex-wrap: wrap; gap: 0.4rem; }
    .pkt-area { height: 320px; }
    .bit-cell { width: 36px; height: 42px; font-size: 0.95rem; }
    .bit-wt { width: 36px; }
    .card-desc { font-size: 0.6rem; }
    .aim-area { height: 300px; }
}