:root {
  --bg: #0a0e14;
  --panel: #111824;
  --panel-2: #16202e;
  --border: #1f2c3d;
  --accent: #4dd2ff;
  --accent-2: #b48cff;
  --danger: #ff4d6d;
  --success: #7dff6a;
  --text: #dce6f2;
  --text-dim: #7d8ea3;
}

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

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  overflow: hidden;
  -webkit-user-select: none; user-select: none;
}

#app { width: 100%; height: 100%; }

.screen { display: none; width: 100%; height: 100%; position: absolute; inset: 0; }
.screen.active { display: block; }

/* 登录 */
#screen-login.active { display: flex; align-items: center; justify-content: center; }
.login-panel { width: 340px; max-width: 92vw; text-align: center; padding: 32px 26px; }

.logo {
  font-size: 40px; font-weight: 800; letter-spacing: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 20px rgba(77, 210, 255, 0.3);
}
.logo.small { font-size: 22px; }
.subtitle { color: var(--text-dim); font-size: 13px; margin: 6px 0 16px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}
.panel h2 { font-size: 16px; margin-bottom: 14px; color: var(--accent); }

.tabs { display: flex; margin-bottom: 14px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.tab { flex: 1; padding: 10px; background: transparent; color: var(--text-dim); border: none; cursor: pointer; font-size: 14px; }
.tab.active { background: var(--panel-2); color: var(--accent); }

.input {
  width: 100%; padding: 12px 14px; margin-bottom: 10px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); font-size: 15px; outline: none;
}
.input:focus { border-color: var(--accent); }
.select { appearance: none; }

.btn {
  display: inline-block; padding: 11px 18px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font-size: 14px; cursor: pointer;
  transition: all .15s; text-align: center;
}
.btn:hover { filter: brightness(1.15); }
.btn.primary { background: linear-gradient(90deg, #1c86d6, #18a0c9); border-color: transparent; }
.btn.success { background: linear-gradient(90deg, #2fa84f, #3fc15f); border-color: transparent; }
.btn.ghost { background: transparent; }
.btn.dev { background: linear-gradient(90deg, #7b2fd4, #b02fc4); border-color: transparent; }
.btn.small { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.error { color: var(--danger); font-size: 13px; min-height: 18px; margin-top: 8px; }
.hint { color: var(--text-dim); font-size: 12px; margin-top: 14px; line-height: 1.6; }

/* 大厅 */
#screen-lobby { padding: 16px; overflow-y: auto; }
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.user-chip { color: var(--text-dim); font-size: 13px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 20px; }
.user-chip .role-dev { color: var(--accent-2); }

.lobby-grid { display: grid; grid-template-columns: 340px 1fr; gap: 16px; max-width: 900px; margin: 0 auto; }
@media (max-width: 720px) { .lobby-grid { grid-template-columns: 1fr; } }

.row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.label { color: var(--text-dim); font-size: 13px; min-width: 34px; }
.seg { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg-btn { padding: 8px 16px; background: transparent; color: var(--text-dim); border: none; cursor: pointer; }
.seg-btn.active { background: var(--accent); color: #041018; }

.room-list { display: flex; flex-direction: column; gap: 10px; }
.room-item { padding: 12px 14px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.room-item .name { font-weight: 600; }
.room-item .meta { color: var(--text-dim); font-size: 12px; }
.room-empty { color: var(--text-dim); text-align: center; padding: 30px 0; }

/* 房间 */
#screen-room.active { display: flex; align-items: center; justify-content: center; }
.room-panel { width: 420px; max-width: 94vw; }
.room-players { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }
.room-player { padding: 12px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; display: flex; align-items: center; gap: 10px; }
.room-player .dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.room-player .pname { flex: 1; font-size: 14px; }
.room-player .ready-tag { font-size: 12px; color: var(--success); }
.room-player .ready-tag.no { color: var(--text-dim); }
.room-actions { display: flex; gap: 12px; }
.room-actions .btn { flex: 1; }

/* 游戏 */
#screen-game { position: absolute; inset: 0; background: #000; }
#game-canvas { display: block; width: 100%; height: 100%; }

.hud { position: absolute; top: 12px; left: 12px; right: 12px; pointer-events: none; }
.hud-objective { font-size: 14px; color: var(--accent); text-shadow: 0 0 8px rgba(0,0,0,0.8); }
.hud-health { font-size: 15px; margin-top: 4px; color: #fff; text-shadow: 0 0 8px rgba(0,0,0,0.8); }
.hud-health .hp-low { color: var(--danger); }
.hud-event { margin-top: 8px; font-size: 13px; color: var(--text); text-shadow: 0 0 8px rgba(0,0,0,0.8); opacity: 0; transition: opacity .3s; }
.hud-event.show { opacity: 1; }

.dev-toggle { position: absolute; bottom: 20px; right: 20px; z-index: 20; }
.dev-panel {
  position: absolute; bottom: 76px; right: 20px; z-index: 20; width: 240px;
  background: rgba(17,24,36,0.95); border: 1px solid var(--accent-2); border-radius: 12px; padding: 14px;
}
.dev-panel h3 { color: var(--accent-2); font-size: 14px; margin-bottom: 10px; }
.dev-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.dev-grid .btn { padding: 8px; font-size: 12px; }

.result {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.7); z-index: 30;
}
.result h2 { font-size: 48px; margin-bottom: 10px; }
.result .win { color: var(--success); text-shadow: 0 0 30px rgba(125,255,106,0.6); }
.result .lose { color: var(--danger); text-shadow: 0 0 30px rgba(255,77,109,0.6); }
.result p { color: var(--text-dim); }

/* 虚拟摇杆 */
#joystick { position: absolute; bottom: 40px; left: 40px; width: 120px; height: 120px; border-radius: 50%; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.15); z-index: 15; display: none; }
#joystick .knob { position: absolute; width: 48px; height: 48px; border-radius: 50%; background: rgba(255,255,255,0.25); left: 36px; top: 36px; }

/* 电影感后处理：暗角 / 胶片噪点 / 危险红边 / 准星 */
#vignette {
  position: absolute; inset: 0; z-index: 10; pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0) 42%, rgba(0,0,0,0.55) 100%);
}
#grade {
  position: absolute; inset: 0; z-index: 10; pointer-events: none;
  background:
    linear-gradient(180deg, rgba(12,22,28,0.4), rgba(16,26,24,0) 32%, rgba(6,10,9,0.3)),
    radial-gradient(ellipse at 50% 42%, rgba(96,124,112,0.13), rgba(8,14,18,0.22));
  mix-blend-mode: soft-light;
}
#grain {
  position: absolute; inset: -60px; z-index: 11; pointer-events: none;
  opacity: 0.07; background-repeat: repeat;
  mix-blend-mode: overlay; animation: grain-jitter 0.18s steps(2) infinite;
}
@keyframes grain-jitter {
  0% { transform: translate(0, 0); }
  25% { transform: translate(-18px, 12px); }
  50% { transform: translate(12px, -16px); }
  75% { transform: translate(-10px, -8px); }
  100% { transform: translate(16px, 10px); }
}
#danger-overlay {
  position: absolute; inset: 0; z-index: 12; pointer-events: none;
  opacity: 0; transition: opacity 0.25s;
  box-shadow: inset 0 0 160px 30px rgba(180,0,0,0.55);
}
#crosshair {
  position: absolute; left: 50%; top: 50%; z-index: 13; pointer-events: none;
  width: 5px; height: 5px; margin: -2.5px 0 0 -2.5px; border-radius: 50%;
  background: rgba(255,255,255,0.55); box-shadow: 0 0 4px rgba(0,0,0,0.9);
}

/* === 恐怖强化：色差扭曲滤镜（怪谈临近时启用） === */
/* 注意：filter 应用到 canvas 每帧重栅格化是性能杀手，故仅用便宜滤镜 */
#game-canvas.horror-distort {
  filter: contrast(1.12) saturate(0.82) brightness(0.9);
}

/* === 心跳脉冲：用 JS 驱动 dangerOverlay.opacity，避免 CSS 动画触发重绘 === */

/* === Jump Scare：怪谈全屏特写 === */
#jumpscare {
  position: absolute; inset: 0; z-index: 100; pointer-events: none;
  background-size: cover; background-position: center;
  opacity: 0; transition: opacity 0.04s;
  mix-blend-mode: normal;
}
#jumpscare.show {
  opacity: 1;
  animation: jumpscare-shake 0.06s steps(2) infinite;
}
@keyframes jumpscare-shake {
  0%   { transform: translate(0, 0) scale(1.05); }
  50%  { transform: translate(-8px, 6px) scale(1.12); }
  100% { transform: translate(6px, -4px) scale(1.05); }
}

/* === 蹲下提示 === */
#stance-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  z-index: 14; color: var(--text-dim); font-size: 12px; letter-spacing: 1px;
  pointer-events: none; opacity: 0; transition: opacity 0.2s;
  text-shadow: 0 0 8px rgba(0,0,0,0.9);
}
#stance-hint.show { opacity: 0.9; }

/* 弹层 */
.modal { position: absolute; inset: 0; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal-box { width: 520px; max-width: 94vw; max-height: 80vh; overflow-y: auto; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.dev-account-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.dev-account { display: flex; align-items: center; gap: 8px; padding: 10px; background: var(--panel-2); border-radius: 8px; flex-wrap: wrap; }
.dev-account .a-name { font-weight: 600; }
.dev-account .a-role { font-size: 11px; padding: 2px 8px; border-radius: 10px; background: var(--border); color: var(--text-dim); }
.dev-account .a-role.developer { background: rgba(180,140,255,0.2); color: var(--accent-2); }
.dev-account .a-stat { font-size: 11px; color: var(--text-dim); }

.hidden { display: none !important; }