Popup / 20 インフォメーション

デザイン見本

システム通知やTips表示に適した、清潔感のあるデザインです。左側のアクセントカラーと脈動するアイコン（animation: pulse）が、ユーザーの注意を自然に惹きつけます。

実装コード

HTML

<div id="popup-container-20">
                        <button id="popup-btn-20">Information</button>
                    </div>
                    <div id="popup-20" class="popup-20">
                        <div class="popup-content-20">
                            <p>Information Popup</p>
                            <p>情報表示に適したクリーンなポップアップウィンドウです。</p>
                        </div>
                    </div>

CSS

#popup-btn-20 {
    cursor: pointer;
    border: none;
    padding: 12px 24px;
    border-radius: 16px;
    font-weight: 600;
    display: block;
    margin: 0 auto;
    width: 180px;
    color: #fff; background-color: #17a2b8;
}
#popup-btn-20:hover {
    opacity: 0.5;
}
.popup-20 {
    position: fixed;
    bottom: -100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    max-width: 90%;
    max-height: 90%;
}
.popup-20.active {
    opacity: 1;
    visibility: visible;
    bottom: 20px;
    transform: translateX(-50%);
    animation: popupShowHide20 3.4s ease forwards;
}
@keyframes popupShowHide20 {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(100%) scale(0.9);
    }
    20% {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1.1);
    }
    30% {
        transform: translateX(-50%) translateY(0) scale(1);
    }
    80% {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(100%) scale(0.9);
    }
}
.popup-content-20 {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 40px;
    border-radius: 12px;
    text-align: left;
    position: relative;
    min-width: 320px;
    border-left: 6px solid #007bff;
    box-shadow: 
        0 4px 12px rgba(0,123,255,0.15),
        0 2px 4px rgba(0,0,0,0.1);
    animation: infoSlide 0.6s ease-out;
    overflow: hidden;
}
.popup-content-20::before {
    content: 'ℹ';
    position: absolute;
    top: 52px;
    left: 20px;
    font-size: 32px;
    color: #007bff;
    background: rgba(0,123,255,0.1);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: infoIcon 2s ease-in-out infinite;
    font-weight: bold;
    line-height: 1;
}
@keyframes infoSlide {
    0% {
        opacity: 0;
        transform: translateX(-50px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}
@keyframes infoIcon {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
}
.popup-content-20 p:first-child {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
    color: #007bff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    position: relative;
    z-index: 1;
    padding-left: 90px;
}
.popup-content-20 p:last-of-type {
    font-size: 16px;
    color: #495057;
    margin-bottom: 0;
    line-height: 1.6;
    font-weight: 400;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    position: relative;
    z-index: 1;
    padding-left: 90px;
}

var btn = document.getElementById('popup-btn-20');
var popup = document.getElementById('popup-20');

if (btn && popup) {
  btn.addEventListener('click', function () {
    popup.classList.add('active');
  });

  popup.addEventListener('animationend', function (e) {
    if (e.animationName.startsWith('popupShowHide')) {
      popup.classList.remove('active');
    }
  });
}