@media (max-width: 480px) {
  .dm {
    width: 90%;
    padding: 20px;
    border-radius: 15px;
  }

  .txt1 {
    font-size: 18px;
  }

  .txt2 {
    font-size: 13px;
  }

  .d3 input[type="btn"] {
    width: 40px;
    height: 40px;
  }

  .d-img {
    width: 80px;
    height: 80px;
  }
}
/* فونت  */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #1f1c2c, #928dab);
    color: #fff;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* قاب موزیک‌ پلیر */
.dm {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 30px;
    border-radius: 20px;
    width: 350px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(15px);
}

/* توضیحات */
.d1 {
    text-align: center;
    margin-bottom: 15px;
}
.txt1 {
    font-size: 20px;
    font-weight: 600;
}
.txt2 {
    font-size: 14px;
    opacity: 0.8;
}

/* نوار زمان */
#len {
    width: 100%;
    margin: 15px 0;
    accent-color: #f88736;
}

/* دکمه‌های کنترل */
.d3 {
    display: flex;
    justify-content: space-between;
}
.d3 button {
    width: 45px;
    height: 45px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(145deg, #ff6a00, #ffb347);
    box-shadow: 0 4px 12px rgba(255, 106, 0, 0.3);
    cursor: pointer;
    transition: transform 0.2s ease;
}
.d3 button:hover {
    transform: scale(1.1);
}

/* تصویر موسیقی */
.d-img {
    width: 100px;
    height: 100px;
    margin: 10px auto;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #fff;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

/* پلی و استپ */
.svg-stop {
  display: none;
}

.playing .svg-stop {
  display: inline;
}

.playing .svg3 {
  display: none;
}

/* قلب */
.svg1 {
  cursor: pointer;
  color: transparent;
  stroke: black;
  stroke-width: 2;
  transition: all 0.3s ease;
}

/*حالت فعال*/
.svg1.active {
  color: red;
  animation: beat 0.6s ;
}

/* انیمیشن ضربان قلب */
@keyframes beat {
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.2);
  }
  50% {
    transform: scale(0.95);
  }
  75% {
    transform: scale(1.1);
  }
}