/* Centered, spacious and animated opening screen. */
.opening {
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 48%, color-mix(in srgb, var(--primary) 88%, #ff7698) 0, color-mix(in srgb, var(--primary) 58%, #160a10) 34%, #10080d 76%);
    animation: opening-background 8s ease-in-out infinite alternate;
}

.opening::before,
.opening::after {
    content: "";
    position: absolute;
    width: min(68vw, 820px);
    aspect-ratio: 1;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(16px);
    opacity: .32;
}

.opening::before {
    left: -22%;
    top: -42%;
    background: radial-gradient(circle, color-mix(in srgb, var(--accent) 30%, transparent), transparent 66%);
    animation: opening-orbit 13s ease-in-out infinite alternate;
}

.opening::after {
    right: -25%;
    bottom: -48%;
    background: radial-gradient(circle, color-mix(in srgb, var(--primary) 64%, #fff 12%), transparent 67%);
    animation: opening-orbit 15s ease-in-out -4s infinite alternate-reverse;
}

.opening-card {
    position: relative;
    isolation: isolate;
    display: flex;
    width: min(520px, calc(100vw - 32px));
    min-height: min(480px, calc(100svh - 48px));
    padding: clamp(52px, 8vh, 78px) clamp(24px, 6vw, 52px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 28px;
    box-shadow: 0 30px 100px rgba(0,0,0,.48), 0 0 70px color-mix(in srgb, var(--primary) 28%, transparent), inset 0 0 45px rgba(255,255,255,.025);
    animation: opening-card-float 4.8s ease-in-out infinite;
}

.opening-card::before {
    content: "";
    position: absolute;
    inset: 12px;
    z-index: -1;
    border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
    border-radius: 20px;
    pointer-events: none;
    animation: opening-frame 3.2s ease-in-out infinite;
}

.opening-card > span {
    display: block;
    margin-bottom: 10px;
    animation: opening-star 2.2s ease-in-out infinite;
}

.opening-card p { margin: 0; }
.opening-card strong { margin: 24px auto 38px; }

.opening-card #openInvite {
    min-width: 190px;
    min-height: 54px;
    margin: 0 auto 22px;
    padding: 0 30px;
    text-align: center;
    line-height: 1.25;
    box-shadow: 0 14px 38px color-mix(in srgb, var(--primary) 55%, transparent), 0 0 0 0 color-mix(in srgb, var(--accent) 42%, transparent);
    animation: opening-button 2.4s ease-in-out infinite;
}

.opening-card small {
    margin: 0 auto;
    text-align: center;
}

body.invite-locked {
    position: fixed;
    inset: 0;
    width: 100%;
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: none;
}

@keyframes opening-background {
    to { filter: saturate(1.14) brightness(1.05); }
}

@keyframes opening-orbit {
    to { transform: translate3d(18%, 13%, 0) scale(1.18); opacity: .5; }
}

@keyframes opening-card-float {
    50% { transform: translateY(-9px); }
}

@keyframes opening-frame {
    50% { opacity: .48; box-shadow: inset 0 0 28px color-mix(in srgb, var(--accent) 12%, transparent); }
}

@keyframes opening-star {
    50% { transform: rotate(90deg) scale(1.25); filter: drop-shadow(0 0 14px var(--accent)); }
}

@keyframes opening-button {
    50% {
        transform: translateY(-3px) scale(1.035);
        box-shadow: 0 18px 46px color-mix(in srgb, var(--primary) 65%, transparent), 0 0 0 9px transparent;
    }
}

@media (max-width: 640px) {
    .opening-card {
        min-height: min(440px, calc(100svh - 32px));
        padding-block: 46px;
    }

    .opening-card strong { margin-bottom: 32px; }
}

@media (prefers-reduced-motion: reduce) {
    .opening,
    .opening::before,
    .opening::after,
    .opening-card,
    .opening-card::before,
    .opening-card > span,
    .opening-card #openInvite {
        animation: none !important;
    }
}

/* Khung thiệp mở đầu: thay thẻ nhỏ bằng một phong bì cưới trang trọng. */
.opening {
    padding: clamp(18px, 4vh, 42px) 18px;
    background:
        radial-gradient(circle at 50% 34%, color-mix(in srgb, var(--primary) 74%, #d88aa0) 0, transparent 38%),
        linear-gradient(135deg, #19070d 0%, color-mix(in srgb, var(--primary) 74%, #250913) 48%, #16060b 100%);
}

.opening-card {
    width: min(590px, calc(100vw - 36px));
    min-height: min(650px, calc(100svh - 46px));
    padding: clamp(64px, 10vh, 104px) clamp(34px, 8vw, 82px) clamp(54px, 8vh, 78px);
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--accent) 72%, transparent) !important;
    border-radius: 48% 48% 18px 18px !important;
    background:
        radial-gradient(circle at 50% 14%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 29%),
        linear-gradient(165deg, color-mix(in srgb, var(--primary) 55%, #280813) 0%, #240711 54%, #15040a 100%) !important;
    box-shadow:
        0 36px 110px rgba(0,0,0,.62),
        0 0 0 8px rgba(255,255,255,.025),
        inset 0 0 75px rgba(255,255,255,.025) !important;
}

.opening-card::before {
    inset: 12px !important;
    border: 1px solid color-mix(in srgb, var(--accent) 64%, transparent) !important;
    border-radius: 48% 48% 13px 13px !important;
    box-shadow: inset 0 0 0 7px color-mix(in srgb, var(--primary) 22%, transparent);
}

.opening-card::after {
    content: "❦";
    position: absolute;
    z-index: -1;
    right: 30px;
    bottom: 26px;
    color: color-mix(in srgb, var(--accent) 74%, transparent);
    font: 84px/1 "Great Vibes", cursive;
    opacity: .32;
    transform: rotate(-18deg);
}

.opening-card > span {
    margin-bottom: 16px;
    font-size: 36px;
    text-shadow: 0 0 18px color-mix(in srgb, var(--accent) 48%, transparent);
}

.opening-wedding-motif {
    min-height: 100px;
    margin: 0 0 12px;
}

.opening-card strong {
    max-width: 100%;
    margin: 25px auto 42px;
    color: var(--accent);
    text-shadow: 0 2px 0 rgba(255,255,255,.1), 0 0 25px color-mix(in srgb, var(--accent) 28%, transparent);
}

.opening-card #openInvite {
    min-width: 214px;
    border: 1px solid color-mix(in srgb, var(--accent) 78%, #fff) !important;
    background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 82%, #fff), var(--primary)) !important;
}

.opening-card small {
    max-width: 280px;
    color: color-mix(in srgb, var(--accent) 55%, #fff) !important;
}

@media (max-width: 640px) {
    .opening-card {
        width: min(430px, calc(100vw - 28px));
        min-height: min(570px, calc(100svh - 28px));
        padding: 64px 28px 50px;
        border-radius: 44% 44% 16px 16px !important;
    }

    .opening-card::before { border-radius: 44% 44% 12px 12px !important; }
    .opening-wedding-motif { min-height: 82px; }
    .opening-card strong { margin: 21px auto 34px; }
}

/* Tô Duyên: tấm thiệp giấy kem đặt trên nền rượu vang, thay vì chỉ là một khung tối. */
body.template-bordeaux .opening-card {
    width: min(680px, calc(100vw - 40px));
    min-height: min(590px, calc(100svh - 54px));
    border: 0 !important;
    border-radius: 8px !important;
    color: #65162b;
    background:
        radial-gradient(circle at 50% 0%, #fffdf3 0%, transparent 38%),
        linear-gradient(135deg, #fff8e9, #f9e8c9 52%, #f1d59f) !important;
    box-shadow: 0 38px 100px #080205a8, 10px 13px 0 #71142c55 !important;
}

body.template-bordeaux .opening-card::before {
    inset: 14px !important;
    border: 2px double #9b253f !important;
    border-radius: 4px !important;
    box-shadow: inset 0 0 0 7px #c8914d22 !important;
}

body.template-bordeaux .opening-card::after {
    content: "❦";
    z-index: 0;
    right: 26px;
    bottom: 22px;
    color: #9b253f;
    font-size: 100px;
    opacity: .14;
}

body.template-bordeaux .opening-card > * { position: relative; z-index: 1; }
body.template-bordeaux .opening-card > span { color: #a11f3d; }
body.template-bordeaux .opening-card p,
body.template-bordeaux .opening-card small { color: #762840 !important; }
body.template-bordeaux .opening-card strong {
    color: #861d37;
    text-shadow: 0 1px #fff8, 0 3px 0 #d6af6788;
}
body.template-bordeaux .opening-wedding-motif::after { color: #9b253f; }
body.template-bordeaux .opening-card #openInvite {
    color: #fff8e9;
    border-color: #f5d893 !important;
    background: linear-gradient(135deg, #77142e, #b93659) !important;
    box-shadow: 0 12px 24px #7a193a44 !important;
}

@media (max-width: 640px) {
    body.template-bordeaux .opening-card {
        width: min(420px, calc(100vw - 28px));
        min-height: min(540px, calc(100svh - 34px));
        padding: 58px 26px 48px;
    }
}
/* The opening transition stays compositor-only so it does not jolt the first scroll. */
.opening { will-change: opacity, transform; }
.opening-card { will-change: transform, opacity; }
.opening.is-open { opacity:0; transform:scale(1.012); pointer-events:none; transition:opacity .42s ease,transform .42s ease; }
.opening.is-open .opening-card { animation:none; transform:translateY(-10px) scale(.985); opacity:0; transition:opacity .34s ease,transform .42s cubic-bezier(.22,.75,.25,1); }
body.invite-open .template-cover { animation:none!important; }
@media(max-width:760px){.opening.is-open{transition-duration:.32s}.opening.is-open .opening-card{transition-duration:.27s,.32s}}
@media(prefers-reduced-motion:reduce){.opening.is-open,.opening.is-open .opening-card{transition:none}}