/* ==========================================================================
   拼图滑块验证 / slider-captcha.css
   纯白底 + 墨绿按钮，与 front-theme.css 保持一致；类名带 am-slider 前缀。
   ========================================================================== */

.am-slider {
    position: relative;
    margin: 4px 0 18px;
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", sans-serif;
    user-select: none;
    -webkit-user-select: none;
}

.am-slider-image {
    position: relative;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid #E5EAE5;
    border-radius: 2px;
    background: #F5F7F5;
    line-height: 0;
}

.am-slider-bg { display: block; width: 100%; height: auto; }
.am-slider-piece {
    position: absolute;
    left: 0; top: 0;
    display: block;
    pointer-events: none;
    filter: drop-shadow(0 2px 4px rgba(22, 46, 38, .35));
    transition: left .3s cubic-bezier(.22, .68, 0, 1);
}

.am-slider-refresh {
    position: absolute;
    top: 8px; right: 8px;
    z-index: 4;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px; height: 26px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, .5);
    border-radius: 2px;
    background: rgba(22, 46, 38, .62);
    color: #fff;
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
    transition: transform .3s ease, background .25s ease;
}
.am-slider-refresh:hover { transform: rotate(90deg); background: rgba(31, 61, 52, .92); }

.am-slider-loading {
    position: absolute;
    inset: 0;
    z-index: 3;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: rgba(22, 46, 38, .82);
    color: rgba(255, 255, 255, .9);
    font-size: 12px;
    line-height: 1.7;
    text-align: center;
}
.am-slider.is-loading .am-slider-loading,
.am-slider.is-error .am-slider-loading { display: flex; }
.am-slider.is-error .am-slider-loading { cursor: pointer; color: #F0D9B8; }

.am-slider-track {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 42px;
    margin: 9px auto 0;
    border: 1px solid #E5EAE5;
    border-radius: 2px;
    background: #F7F9F7;
    overflow: hidden;
    transition: border-color .25s ease;
}
.am-slider-fill {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 0;
    background: rgba(62, 110, 91, .14);
    transition: width .3s cubic-bezier(.22, .68, 0, 1), background .25s ease;
}
.am-slider.is-done .am-slider-fill { background: rgba(63, 122, 82, .20); }
.am-slider.is-error .am-slider-fill { background: rgba(168, 68, 60, .14); }

.am-slider-tip { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; padding-left: 28px; color: #8C968E; font-size: 12px; pointer-events: none; }
.am-slider.is-done .am-slider-tip { color: var(--am-success, #3F7A52); }
.am-slider.is-verifying .am-slider-tip { color: #3E6E5B; }
.am-slider.is-dragging .am-slider-tip { opacity: .35; }

.am-slider-handle {
    position: absolute;
    left: 0; top: -1px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px; height: 42px;
    padding: 0;
    border: 1px solid #1F3D34;
    border-radius: 2px;
    background: #1F3D34;
    color: #fff;
    font-size: 16px;
    line-height: 1;
    cursor: grab;
    touch-action: none;
    transition: left .3s cubic-bezier(.22, .68, 0, 1), background .2s ease;
}
.am-slider-handle:hover { background: #2C5546; }
.am-slider.is-dragging .am-slider-handle { cursor: grabbing; }
.am-slider.is-done .am-slider-handle { background: #3F7A52; border-color: #3F7A52; }
.am-slider.is-error .am-slider-handle { background: #A8443C; border-color: #A8443C; }
.am-slider.is-loading .am-slider-handle { opacity: .5; cursor: not-allowed; }
.am-slider.is-verifying .am-slider-handle { opacity: .78; cursor: progress; }

/* 拖动时不做过渡，保证跟手；松手校验失败时由过渡把滑块带回起点 */
.am-slider.is-dragging .am-slider-handle,
.am-slider.is-dragging .am-slider-piece,
.am-slider.is-dragging .am-slider-fill { transition: none; }

@keyframes am-slider-shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-5px); }
    40% { transform: translateX(5px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(3px); }
}
.am-slider.is-wrong .am-slider-track { animation: am-slider-shake .4s ease; border-color: #A8443C; }
.am-slider.is-wrong .am-slider-fill { background: rgba(168, 68, 60, .18); }

.am-slider-status { min-height: 16px; margin-top: 6px; color: #8C968E; font-size: 11px; line-height: 1.6; text-align: center; }
.am-slider-status.is-ok { color: #3F7A52; }
.am-slider-status.is-error { color: #A8443C; }

@media (max-width: 680px) {
    .am-slider-track { height: 40px; }
    .am-slider-handle { width: 40px; height: 40px; }
}
@media (prefers-reduced-motion: reduce) {
    .am-slider-handle, .am-slider-piece, .am-slider-fill { transition: none; }
    .am-slider.is-wrong .am-slider-track { animation: none; }
}