:root {
  --size: 480px;
  --border: 10px;
}

h1{ margin:8px 0 0; font-size:22px; font-weight:800; letter-spacing:.2px;    text-align: center;}
.wrap{ position:relative; width:var(--size); height:var(--size); margin:22px auto 8px; }
#wheel{
  width:100%; height:100%; display:block; border-radius:50%;
  box-shadow: 0 12px 30px rgba(0,0,0,.18), inset 0 0 0 var(--border) #111;
  cursor:pointer; background:#fff;
}
/* Mũi tên hướng xuống */
.pointer{
  position:absolute; left:50%; top:-14px; transform:translateX(-50%);
  width:0; height:0;
  border-left: 22px solid transparent;
  border-right:22px solid transparent;
  border-top: 44px solid #e11d48; /* đỏ, hướng xuống */
  filter: drop-shadow(0 6px 6px rgba(0,0,0,.25));
  z-index:5;
}
.hint{ font-size:14px; opacity:.8; margin:6px 0 0 }
.result{
  margin-top:10px; font-size:20px; font-weight:800; color:#0ea5e9;
  text-shadow: 0 1px 0 #fff;
}
.bar{
  width:min(560px, 92vw); height:10px; border-radius:999px; background:#e5e7eb; overflow:hidden; margin-top:10px;
}
.fill{ height:100%; width:0%; background:linear-gradient(90deg,#34d399,#22c55e); transition:width .1s; }

.tths{
	font-size: 14px;

		
}
button {
  pointer-events: auto !important;
  z-index: 9999;
}
#lopname{
	background-color:aqua;
	padding: 3px;
	color: black;
	border-radius: 6px;
}
#reset_games{
	background-color: red;
}
.thongtinhocsinh {
  position: fixed;      /* cố định bên trái */
  top: 10px;
  left: 6px;
  width: 220px;
  max-height: 40px;
  background: #fff;
  padding: 12px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,.1);
  overflow: hidden;
}
.button-with-icon {
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #0f988e;
  font-family: "Istok Web", sans-serif;
  letter-spacing: 1px;
  padding: 0 12px;
  text-align: center;
  min-width: 120px;
  white-space: nowrap;
  height: 40px;
  font-size: 14px;
  text-transform: uppercase;
  font-weight: normal;
  border-radius: 3px;
  outline: none;
  user-select: none;
  cursor: pointer;
  transform: translateY(0px);
  position: relative;
  box-shadow:
    inset 0 30px 30px -15px rgba(255, 255, 255, 0.1),
    inset 0 0 0 1px rgba(255, 255, 255, 0.3),
    inset 0 1px 20px rgba(0, 0, 0, 0),
    0 3px 0 #0f988e,
    0 3px 2px rgba(0, 0, 0, 0.2),
    0 5px 10px rgba(0, 0, 0, 0.1),
    0 10px 20px rgba(0, 0, 0, 0.1);
  background: #15ccbe;
  color: white;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.3);
  transition: 150ms all ease-in-out;
}
.button-with-icon.skip {
    border: 1px solid #cecece;
    box-shadow: inset 0 30px 30px -15px rgba(255, 255, 255, 0.1), inset 0 0 0 1px rgba(255, 255, 255, 0.3), inset 0 1px 20px rgba(0, 0, 0, 0), 0 3px 0 #9e9e9e, 0 3px 2px rgba(0, 0, 0, 0.2), 0 5px 10px rgba(0, 0, 0, 0.1), 0 10px 20px rgba(0, 0, 0, 0.1);
    background: #eee;
    color: #484848;
}
.button-with-icon .icon {
  margin-right: 8px;
  width: 24px;
  height: 24px;
  transition: all 0.5s ease-in-out;
}

.button-with-icon:active {
  transform: translateY(3px);
  box-shadow:
    inset 0 16px 2px -15px rgba(0, 0, 0, 0),
    inset 0 0 0 1px rgba(255, 255, 255, 0.15),
    inset 0 1px 20px rgba(0, 0, 0, 0.1),
    0 0 0 #0f988e,
    0 0 0 2px rgba(255, 255, 255, 0.5),
    0 0 0 rgba(0, 0, 0, 0),
    0 0 0 rgba(0, 0, 0, 0);
}

.button-with-icon:hover .text {
  transform: translateX(80px);
}
.button-with-icon:hover .icon {
  transform: translate(23px);
}

.text {
  transition: all 0.5s ease-in-out;
}


.trang_ti{
	 width: 200px;
  height: 300px;
	 position: fixed;
	left: 20px;
	top: 120px;
}

/* Thanh level */
.level-bar {
  position: fixed;
  top: 160px;
  left: 80px;
  width: 30px;
  height: 500px;
  background: linear-gradient(to top, #eee, #ddd);
  border: 3px solid #aaa;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.level-track {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 10px;
  height: 100%;
  background: #ccc;
  transform: translateX(-50%);
  border-radius: 5px;
}

.level-monkey {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 160px;
  height: 160px;
  transform: translateX(-50%);
  transition: bottom 0.8s ease;
}

.level-label {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 18px;
  font-weight: bold;
}
/* Màn hình chào m?ng */
#welcomeScreen {
  position: fixed;
  top:0; left:0; right:0; bottom:0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #74ebd5, #ACB6E5);
  font-family: "Poppins", sans-serif;
  text-align: center;
  color: #fff;
  transition: opacity 1s ease;
  z-index: 1000;
  overflow: hidden;
}

#lang_switch input {
  display: none;
}
#lang_switch input + svg {
  width: 50px;
  border: 1px solid #fff;
  cursor: pointer;
  height: auto;
}

    /* Logo góc trên ph?i */
  #welcomeScreen .logo {
    position: absolute;
    top: 15px;
    right: 25px;
    flex-direction: column; /* thêm dòng này d? xu?ng dòng */
    align-items: flex-end;  /* can ph?i */
    align-items: center;
    gap: 10px;
    animation: slideInRight 1.2s ease;
  }

  #welcomeScreen .logo img {
    width: 50px;
    height: 50px;
  }

  #welcomeScreen .logo span {
    font-size: 1.4em;
    font-weight: bold;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
  }

  /* Tiêu d? */
  #welcomeScreen .title {
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 30px;
    animation: slideDown 1.2s ease;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.4);
  }

  /* Nút b?t d?u */
  #welcomeScreen button {
    padding: 15px 40px;
    font-size: 1.2em;
    font-weight: bold;
    border: none;
    border-radius: 50px;
    background: #ff9800;
    color: #fff;
    cursor: pointer;
    box-shadow: 0 6px 15px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    animation: fadeIn 2s ease;
  }

  #welcomeScreen button:hover {
    background: #ffb84d;
    transform: scale(1.05);
    box-shadow: 0 8px 18px rgba(0,0,0,0.4);
  }

  /* Hi?u ?ng khi bi?n m?t */
  #welcomeScreen.fadeOut {
    opacity: 0;
    pointer-events: none;
  }

  /* Keyframes */
  @keyframes slideDown {
    from {transform: translateY(-100px); opacity: 0;}
    to {transform: translateY(0); opacity: 1;}
  }

  @keyframes slideInRight {
    from {transform: translateX(100px); opacity: 0;}
    to {transform: translateX(0); opacity: 1;}
  }

  @keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
  }
  /* Gradient d?ng cho welcome screen */
  #welcomeScreen {
    background: linear-gradient(135deg, #74ebd5, #ACB6E5, #fbc2eb, #a6c1ee);
    background-size: 400% 400%;
    animation: gradientMove 10s ease infinite;
  }

  /* Hi?u ?ng gradient ch?y */
  @keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

  /* Tiêu d? ánh sáng ch?y qua */
  #welcomeScreen .title {
    position: relative;
    overflow: hidden;
  }
  #welcomeScreen .title::after {
    content: "";
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.8), transparent);
    animation: shine 3s infinite;
  }
  @keyframes shine {
    0% { left: -100%; }
    50% { left: 100%; }
    100% { left: 100%; }
  }

  /* Nút Start rung nh? */
  #welcomeScreen button {
    animation: bounce 2s infinite;
  }
  @keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-6px); }
    60% { transform: translateY(-3px); }
  }

  /* Khi bi?n m?t: zoom out + fade */
  #welcomeScreen.fadeOut {
    opacity: 0;
    transform: scale(1.2);
    transition: opacity 1s ease, transform 1s ease;
  }



  .score {position:fixed; top:20px; left:160px; font-size:180px; font-weight:bold; color:#28a745; display:flex; align-items:center;}
  .monkey {width:120px; height:120px; margin-left:10px;}
  .timer {position:fixed; top:20px; right:40px; font-size:180px; font-weight:bold; color:#e63946; display:flex; align-items:center;}
  .timer span {display:inline-block; transition:transform 0.3s ease;}
  .pulse {animation:pulseAnim 0.6s ease;}
  @keyframes pulseAnim {0%{transform:scale(1);}50%{transform:scale(1.6);}100%{transform:scale(1);} }
  .timer-chicken {width:120px; height:auto; margin-left:20px;} /* gà cạnh đồng hồ */
  .chicken-box {position:fixed; top:340px; right:140px; text-align:center;}
  .chicken-reaction {width:260px; height:auto;}
  .container {max-width:700px; margin:120px auto; background:#fff; padding:20px; border-radius:12px; box-shadow:0 4px 12px rgba(0,0,0,0.2); text-align:center;}
  .question {font-size:26px; margin-bottom:0px;}
  .options button {display:block; width:100%; text-align:left; padding:14px; margin:12px 0; font-size:22px; border:2px solid #ccc; border-radius:8px; cursor:pointer; background:#f7f7f7; transition:background 0.3s;}
  .options button:hover:not(:disabled){background:#eee;}
  .options button.correct {background:#c8f7c5; border-color:green;}
  .options button.wrong {background:#f7c5c5; border-color:red;}
  .options button.disabled {background:#ddd!important; color:#777; cursor:not-allowed;}
  .controls {margin-top:20px;}
  .controls button {padding:14px 28px; font-size:20px; border:none; border-radius:8px; cursor:pointer; background:#007bff; color:#fff;}
  .config {margin:20px auto; text-align:center;}
  .config label {font-size:18px; margin-right:10px;}
  .config input {width:60px; padding:5px; font-size:18px; text-align:center; margin-right:20px;}



  /*VONG QUAY__________________________*/
  body {
    margin: 0;
    font-family: system-ui, Arial, sans-serif;
    color:#1f2937;
    background: radial-gradient(circle at 50% 20%, #fff, #e6f0ff 60%, #d9e8ff);
    display: flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap: 30px;
    min-height: 100vh;
    overflow:hidden;
  }

  h1{ margin:8px 0 0; font-size:22px; font-weight:800; letter-spacing:.2px}
  .wrap{ position:relative; width:var(--size); height:var(--size); margin:22px auto 8px; }
  #wheel{
    width:100%; height:100%; display:block; border-radius:50%;
    box-shadow: 0 12px 30px rgba(0,0,0,.18), inset 0 0 0 var(--border) #111;
    cursor:pointer; background:#fff;
  }
  /* Mũi tên hướng xuống */
  .pointer{
    position:absolute; left:50%; top:-14px; transform:translateX(-50%);
    width:0; height:0;
    border-left: 22px solid transparent;
    border-right:22px solid transparent;
    border-top: 44px solid #e11d48; /* đỏ, hướng xuống */
    filter: drop-shadow(0 6px 6px rgba(0,0,0,.25));
    z-index:5;
  }
  .hint{ font-size:14px; opacity:.8; margin:6px 0 0 }
  .result{
    margin-top:10px; font-size:20px; font-weight:800; color:#0ea5e9;
    text-shadow: 0 1px 0 #fff;
  }
  .bar{
    width:min(560px, 92vw); height:10px; border-radius:999px; background:#e5e7eb; overflow:hidden; margin-top:10px;
  }
  .fill{ height:100%; width:0%; background:linear-gradient(90deg,#34d399,#22c55e); transition:width .1s; }


  .btn_r {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 8px;
    border: none;
    background: #0f988e;
    color: #fff;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0,0,0,.2);
    transition: all .3s;
  }
  .btn_r:hover {
    background: #15ccbe;
    transform: scale(1.05);
  }
  .chon_chedo {
    margin-bottom: 12px;
    font-size: 16px;
  }
  .chon_chedo label {
    margin-right: 16px;
  }


  /* Danh sách bên trái */
  .left {
    position: fixed;      /* cố định bên trái */
    top: 10px;
    left: 6px;
    width: 220px;
    max-height: 100vh;
    background: #fff;
    padding: 12px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
    overflow: hidden;
  }
  .right {
    position: fixed;      /* cố định bên trái */
    top: 10px;
    right: 10px;
    width: 220px;
    max-height: 400px;
    background: #fff;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 34px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
    overflow: hidden;
  }
  .right_down {
    position: fixed;      /* cố định bên trái */
    bottom: 10px;
    right: 10px;
    width: 220px;
    max-height: 400px;
    background: #fff;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 34px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
    overflow: hidden;
  }
  .left h3 {
    margin-top: 0;
    font-size: 18px;
    text-align: center;
  }

  .left ul {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 600px;
    overflow-y: auto;
    scrollbar-width: thin;
  }

  .left li {
    background: #e0f2fe;
    margin: 4px 0;
    padding: 6px 10px;
    border-radius: 5px;
    font-weight: bold;
    color: #0369a1;
  }

  /* Vòng quay */
  .wheel-area {
    flex: none;
    display: flex;
    flex-direction: column;
    align-items: center;
  }