/* =====================================================
 * slither.css — Slither 게임 스타일 v2
 * ===================================================== */

:root {
    --bg:      #0d1117;
    --surface: rgba(255,255,255,0.04);
    --border:  rgba(255,255,255,0.10);
    --text:    #e6edf3;
    --muted:   rgba(255,255,255,0.45);
    --accent:  #00ffcc;
    --gold:    #ffd700;
    --danger:  #ff4444;
    --pink:    #ff6699;
}

* { margin:0; padding:0; box-sizing:border-box; }
html, body { width:100%; height:100%; overflow:hidden; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Segoe UI', system-ui, sans-serif;
    user-select: none;
}

/* ══ 화면 전환 ══ */
.screen { display:none; width:100vw; height:100vh; flex-direction:column; align-items:center; justify-content:center; }
.screen.active { display:flex; }

/* ══ 로비 화면 ══ */
#screen-lobby {
    background: radial-gradient(ellipse at 50% 30%, #0d2018, #0d1117 70%);
    padding: 1.5rem;
    overflow-y: auto;
}

.lobby-box {
    background: linear-gradient(160deg, rgba(0,40,30,.95), rgba(13,17,23,.98));
    border: 2px solid var(--accent);
    border-radius: 16px;
    padding: 2rem 1.8rem;
    max-width: 440px;
    width: 100%;
    text-align: center;
}

.lobby-logo {
    font-size: 3rem;
    margin-bottom: .4rem;
    animation: float 3s ease-in-out infinite;
}
@keyframes float {
    0%,100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}

.lobby-title {
    color: var(--accent);
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: .25em;
    margin-bottom: .3rem;
    text-shadow: 0 0 30px rgba(0,255,204,.4);
}

.lobby-sub {
    color: var(--muted);
    font-size: .78rem;
    letter-spacing: .1em;
    margin-bottom: 1.5rem;
}

/* XE 로그인 상태 */
.xe-check {
    background: rgba(0,0,0,.35);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .7rem 1rem;
    margin-bottom: 1rem;
}
#lobby-user-name   { color: var(--accent); font-size: .9rem; }
#lobby-user-status { color: var(--muted);  font-size: .72rem; margin-top: 2px; }

/* 비로그인 섹션 */
#lobby-guest-section { padding: .8rem 0; }
#lobby-guest-section p { color: var(--muted); font-size: .82rem; line-height: 1.8; margin-bottom: 1rem; }

/* 로그인 섹션 */
#lobby-member-section { display:none; }

/* 서버 현황 */
.server-status {
    background: rgba(0,0,0,.3);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1.2rem;
}

.status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: .6rem;
    margin-bottom: .8rem;
}

.stat-box {
    background: rgba(255,255,255,.04);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .6rem .4rem;
    text-align: center;
}

.stat-num {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.stat-num.bot  { color: var(--pink); }
.stat-num.total { color: var(--gold); }

.stat-label {
    font-size: .65rem;
    color: var(--muted);
    margin-top: .2rem;
    letter-spacing: .05em;
}

/* 접속자 바 */
.bar-track {
    height: 6px;
    background: rgba(255,255,255,.08);
    border-radius: 3px;
    overflow: hidden;
}
.bar-fill {
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent), #00cc99);
    transition: width .6s ease;
}
.bar-fill.warn { background: linear-gradient(90deg, var(--gold), #cc9900); }
.bar-fill.full { background: linear-gradient(90deg, var(--danger), #cc0000); }

.bar-label {
    display: flex;
    justify-content: space-between;
    font-size: .65rem;
    color: var(--muted);
    margin-top: .3rem;
}

/* ── 스킨 선택 ── */
.skin-section {
    margin: 12px 0;
    width: 100%;
}
.skin-title {
    font-size: .8rem;
    color: var(--accent);
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: .05em;
    text-align: left;
}
.skin-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    max-height: 220px;
    overflow-y: auto;
    padding: 4px 2px;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
}
.skin-item {
    background: rgba(255,255,255,.05);
    border: 2px solid rgba(255,255,255,.1);
    border-radius: 8px;
    cursor: pointer;
    padding: 4px;
    text-align: center;
    transition: all .2s;
}
.skin-item:hover {
    border-color: rgba(0,255,204,.5);
    background: rgba(0,255,204,.08);
    transform: translateY(-1px);
}
.skin-item.selected {
    border-color: var(--accent);
    background: rgba(0,255,204,.15);
    box-shadow: 0 0 10px rgba(0,255,204,.3);
}
.skin-item canvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}
.skin-label {
    font-size: .6rem;
    color: rgba(255,255,255,.7);
    margin-top: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.skin-item.selected .skin-label { color: var(--accent); }

/* 게임 참가 버튼 */
.btn-join {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent), #00cc99);
    color: #000;
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: .08em;
    cursor: pointer;
    transition: all .2s;
    margin-bottom: .8rem;
    box-shadow: 0 4px 20px rgba(0,255,204,.3);
}
.btn-join:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(0,255,204,.45); }
.btn-join:active { transform: scale(.97); }
.btn-join:disabled { opacity:.4; cursor:default; transform:none; }

/* 참가자 목록 */
.player-list-wrap {
    background: rgba(0,0,0,.25);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .7rem;
    margin-bottom: 1rem;
    max-height: 120px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
    text-align: left;
}
.player-list-title {
    font-size: .68rem;
    color: var(--muted);
    letter-spacing: .08em;
    margin-bottom: .4rem;
}
.player-row {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .78rem;
    padding: 2px 0;
}
.player-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* 조작법 */
.controls-info {
    font-size: .72rem;
    color: var(--muted);
    line-height: 1.8;
    background: rgba(0,0,0,.2);
    border-radius: 8px;
    padding: .6rem .8rem;
    margin-bottom: 1rem;
    text-align: left;
}
.controls-info span { color: var(--accent); }

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    padding: .4rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: .78rem;
    transition: all .2s;
    text-decoration: none;
    display: inline-block;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-lob-red {
    background: linear-gradient(135deg,#2a0a0a,#150606);
    border: 1px solid var(--danger);
    color: var(--text);
    padding: .5rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: .82rem;
    transition: all .2s;
}
.btn-lob-red:hover { border-color: #ff6666; color: #ff6666; }

/* ══ 게임 화면 ══ */
#screen-game {
    background: #0d1117;
    position: relative;
}
#gameCanvas {
    display: block;
    cursor: crosshair;
    position: absolute;
    top:0; left:0;
    width:100%; height:100%;
}

/* HUD */
#hud {
    position: absolute;
    top:0; left:0; right:0; bottom:0;
    pointer-events: none;
    z-index: 10;
}
#scoreboard {
    position: absolute;
    top: 12px; right: 12px;
    background: rgba(0,0,0,.72);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    font-size: .76rem;
    min-width: 170px;
    max-height: 65vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
}
.score-title {
    font-size: .65rem;
    color: rgba(255,255,255,.3);
    letter-spacing: 1px;
    margin-bottom: 6px;
}
.score-row {
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 3px 0;
    font-size: .78rem;
}
.sdot { width:9px; height:9px; border-radius:50%; flex-shrink:0; }
.sdot.dead { opacity:.25; }
.sdot.bot  { border: 1px solid rgba(255,255,255,.3); }

#my-info {
    position: absolute;
    bottom: 12px; left: 12px;
    background: rgba(0,0,0,.68);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 7px 13px;
    font-size: .8rem;
}
.server-info-hud {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(0,0,0,.65);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: .72rem;
    color: var(--muted);
}
#controls-hint {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,.5);
    border-radius: 8px;
    padding: 5px 14px;
    font-size: .7rem;
    color: var(--muted);
    white-space: nowrap;
}
#exit-btn {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(0,0,0,.65);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    padding: 6px 14px;
    font-size: .76rem;
    cursor: pointer;
    pointer-events: all;
    transition: all .15s;
}
#exit-btn:hover { border-color: var(--accent); color: var(--accent); }

/* 게임 오버 오버레이 */
#go-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.82);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    display: none;
    z-index: 20;
}
#go-overlay.show  { display: flex; }
#go-overlay h2    { font-size: 2rem; color: var(--danger); margin-bottom: 8px; }
#go-overlay .rank { font-size: 1rem; color: var(--gold); margin-bottom: 6px; }
#go-overlay p     { color: var(--muted); margin-bottom: 22px; font-size: .9rem; }

.btn-restart {
    background: linear-gradient(135deg, var(--accent), #00cc99);
    color: #000;
    border: none;
    border-radius: 10px;
    padding: .8rem 2rem;
    font-size: .95rem;
    font-weight: 700;
    cursor: pointer;
    pointer-events: all;
    transition: all .2s;
}
.btn-restart:hover { transform: translateY(-2px); }

/* 토스트 */
.toast {
    position: fixed;
    top: 52px;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background: rgba(10,20,15,.96);
    border: 1.5px solid var(--accent);
    color: var(--accent);
    padding: .4rem 1.3rem;
    border-radius: 30px;
    font-size: .8rem;
    z-index: 700;
    opacity: 0;
    transition: all .25s;
    pointer-events: none;
    white-space: nowrap;
}
.toast.show { opacity:1; transform:translateX(-50%) translateY(0); }