/* =============================================
   Animated Marker Highlight — animated-marker.css
   ============================================= */

/* ベーススタイル */
mark.am-highlight {
    background: none;
    color: inherit;
    position: relative;
    display: inline;

    /* グラデーションで背景を描画するための準備 */
    background-repeat: no-repeat;
    background-position: left center;
    background-size: 0% 100%;   /* 初期幅 0 → アニメで 100% に */
    padding: 0 0.15em;
    border-radius: 2px;

    /* アニメーション定義（am-animate クラスが付いたとき発火） */
    transition: none;
}

/* スクロールで表示されたときに発火 */
mark.am-highlight.am-animate {
    animation: am-draw 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes am-draw {
    0%   { background-size: 0%   100%; }
    100% { background-size: 102% 100%; }
}

/* ===================== カラー ===================== */

/* イエロー（デフォルト）*/
mark.am-color-yellow {
    background-image: linear-gradient(
        104deg,
        rgba(255, 230, 0, 0)   0%,
        rgba(255, 230, 0, 0.85) 5%,
        rgba(255, 230, 0, 0.9)  45%,
        rgba(255, 235, 30, 0.7) 70%,
        rgba(255, 230, 0, 0.9)  85%,
        rgba(255, 230, 0, 0)   100%
    );
}

/* グリーン */
mark.am-color-green {
    background-image: linear-gradient(
        104deg,
        rgba(100, 220, 120, 0)   0%,
        rgba(100, 220, 120, 0.8) 5%,
        rgba(100, 220, 120, 0.85) 45%,
        rgba(130, 230, 140, 0.65) 70%,
        rgba(100, 220, 120, 0.85) 85%,
        rgba(100, 220, 120, 0)   100%
    );
}

/* ピンク */
mark.am-color-pink {
    background-image: linear-gradient(
        104deg,
        rgba(255, 150, 180, 0)   0%,
        rgba(255, 150, 180, 0.8) 5%,
        rgba(255, 150, 180, 0.85) 45%,
        rgba(255, 170, 195, 0.65) 70%,
        rgba(255, 150, 180, 0.85) 85%,
        rgba(255, 150, 180, 0)   100%
    );
}

/* ブルー */
mark.am-color-blue {
    background-image: linear-gradient(
        104deg,
        rgba(100, 180, 255, 0)    0%,
        rgba(100, 180, 255, 0.8)  5%,
        rgba(100, 180, 255, 0.85) 45%,
        rgba(130, 200, 255, 0.65) 70%,
        rgba(100, 180, 255, 0.85) 85%,
        rgba(100, 180, 255, 0)    100%
    );
}

/* オレンジ */
mark.am-color-orange {
    background-image: linear-gradient(
        104deg,
        rgba(255, 165, 50, 0)   0%,
        rgba(255, 165, 50, 0.8) 5%,
        rgba(255, 165, 50, 0.85) 45%,
        rgba(255, 185, 80, 0.65) 70%,
        rgba(255, 165, 50, 0.85) 85%,
        rgba(255, 165, 50, 0)   100%
    );
}

/* レッド */
mark.am-color-red {
    background-image: linear-gradient(
        104deg,
        rgba(255, 90, 90, 0)    0%,
        rgba(255, 90, 90, 0.75) 5%,
        rgba(255, 90, 90, 0.8)  45%,
        rgba(255, 110, 110, 0.6) 70%,
        rgba(255, 90, 90, 0.8)  85%,
        rgba(255, 90, 90, 0)    100%
    );
}

/* ===================== 太さ ===================== */

/* 細め */
mark.am-thick-thin {
    background-position: left 55%;
    padding-top: 0;
    padding-bottom: 0;
    line-height: 1.6;
    background-size: 0% 45%;
}
mark.am-thick-thin.am-animate {
    animation: am-draw-thin 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}
@keyframes am-draw-thin {
    0%   { background-size: 0%   45%; }
    100% { background-size: 102% 45%; }
}

/* 中（デフォルト） */
mark.am-thick-medium {
    background-position: left 50%;
    background-size: 0% 65%;
}
mark.am-thick-medium.am-animate {
    animation: am-draw-medium 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}
@keyframes am-draw-medium {
    0%   { background-size: 0%   65%; }
    100% { background-size: 102% 65%; }
}

/* 太め */
mark.am-thick-thick {
    background-position: left 50%;
    background-size: 0% 90%;
}
mark.am-thick-thick.am-animate {
    animation: am-draw-thick 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}
@keyframes am-draw-thick {
    0%   { background-size: 0%   90%; }
    100% { background-size: 102% 90%; }
}

/* ===================== ちょっとガタつき感を出す補助SVGフィルタ ===================== */
/* オプション：よりリアルな手書き感のためにSVGフィルタ適用 */
mark.am-highlight.am-handwritten {
    filter: url(#am-roughen);
}