:root {
    --success-green: #4f8a55;
    --success-green-dark: #3f7245;
    --success-gold: #b89b5e;
    --success-ink: #14222b;
    --success-muted: #687078;
}

#customAlert {
    position: fixed;
    inset: 0;
    z-index: 2147483647;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(8, 17, 24, 0.66);
    -webkit-backdrop-filter: blur(7px);
    backdrop-filter: blur(7px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
}

#customAlert.is-visible {
    opacity: 1;
    visibility: visible;
}

.success-modal {
    position: relative;
    width: min(100%, 580px);
    padding: 42px 42px 34px;
    overflow: hidden;
    text-align: center;
    background: rgba(255, 255, 255, .98);
    border: 1px solid rgba(255, 255, 255, .85);
    border-radius: 24px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, .28);
    transform: translateY(20px) scale(.94);
    transition: transform .34s cubic-bezier(.2, .8, .2, 1);
}

#customAlert.is-visible .success-modal {
    transform: translateY(0) scale(1);
}

.success-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    color: #62686d;
    background: transparent;
    font-size: 30px;
    line-height: 1;
    cursor: pointer;
    transition: background .2s ease, transform .2s ease;
}

.success-close:hover,
.success-close:focus-visible {
    background: #f0f2f2;
    transform: rotate(4deg);
    outline: none;
}

.success-icon-wrap {
    position: relative;
    display: grid;
    place-items: center;
    width: 122px;
    height: 122px;
    margin: 0 auto 26px;
}

.success-icon-glow {
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    background: rgba(83, 187, 88, .14);
    filter: blur(9px);
    animation: successPulse 2.2s ease-in-out infinite;
}

.success-icon {
    position: relative;
    width: 92px;
    height: 92px;
    border: 3px solid #5bc451;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 10px 30px rgba(80, 170, 75, .18);
}

.success-icon svg {
    width: 100%;
    height: 100%;
    padding: 22px;
    overflow: visible;
}

.success-check {
    fill: none;
    stroke: #58bd4f;
    stroke-width: 7;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 62;
    stroke-dashoffset: 62;
}

#customAlert.is-visible .success-check {
    animation: drawSuccessCheck .58s .18s ease forwards;
}

.success-spark {
    position: absolute;
    width: 6px;
    height: 6px;
    border: 2px solid #68cf6a;
    opacity: 0;
    transform: rotate(45deg) scale(.2);
}

.success-spark:nth-child(1) { top: 9px; left: 22px; }
.success-spark:nth-child(2) { top: 24px; right: 5px; border-radius: 50%; }
.success-spark:nth-child(3) { bottom: 12px; right: 20px; }
.success-spark:nth-child(4) { bottom: 22px; left: 4px; border-radius: 50%; }

#customAlert.is-visible .success-spark {
    animation: successSpark .7s .38s ease forwards;
}

.success-title {
    margin: 0 0 14px;
    color: var(--success-ink);
    font-size: clamp(28px, 4.6vw, 35px);
    font-weight: 650;
    line-height: 1.2;
}

.success-message {
    max-width: 440px;
    margin: 0 auto;
    color: var(--success-muted);
    font-size: 18px;
    line-height: 1.65;
}

.success-divider {
    width: 76%;
    height: 1px;
    margin: 30px auto 26px;
    background: linear-gradient(90deg, transparent, #dde1e2, transparent);
}

.success-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 54px;
    padding: 13px 25px;
    border: 0;
    border-radius: 11px;
    color: #fff;
    background: linear-gradient(135deg, var(--success-green), var(--success-green-dark));
    box-shadow: 0 9px 22px rgba(63, 114, 69, .25);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .035em;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease;
}

.success-action:hover,
.success-action:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(63, 114, 69, .32);
    outline: none;
}

.success-subaction {
    display: block;
    margin: 18px auto 0;
    padding: 5px 10px;
    border: 0;
    color: #70767a;
    background: transparent;
    font-size: 14px;
    cursor: pointer;
}

body.success-popup-open {
    overflow: hidden;
}

@keyframes drawSuccessCheck { to { stroke-dashoffset: 0; } }
@keyframes successPulse { 50% { transform: scale(1.13); opacity: .55; } }
@keyframes successSpark {
    55% { opacity: 1; transform: rotate(45deg) scale(1.1); }
    100% { opacity: .7; transform: rotate(45deg) scale(1); }
}

@media (max-width: 600px) {
    #customAlert { padding: 15px; }
    .success-modal { padding: 38px 22px 27px; border-radius: 20px; }
    .success-icon-wrap { margin-bottom: 20px; transform: scale(.9); }
    .success-message { font-size: 16px; }
    .success-divider { margin: 24px auto 21px; }
    .success-action { width: 100%; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
    #customAlert, .success-modal, .success-check, .success-spark, .success-icon-glow {
        animation: none !important;
        transition: none !important;
    }
    #customAlert.is-visible .success-check { stroke-dashoffset: 0; }
}