#video-birthday {
    position: fixed;
    inset: 0;
    z-index: 60;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.65s ease, visibility 0.65s ease;
}

#video-birthday.is-active {
    z-index: 100;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

#video-birthday .video-birthday__main {
    height: 100%;
    height: 100dvh;
    padding-bottom: calc(4.5rem + env(safe-area-inset-bottom, 0px));
}

/* Nút tiếp tục — kiểu pill giống textBirthday2 */
#video-birthday .video-actions {
    position: absolute;
    left: 50%;
    bottom: calc(1.1rem + env(safe-area-inset-bottom, 0px));
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: center;
    width: max-content;
    padding: clamp(0.35rem, 1.2vw, 0.55rem) clamp(0.7rem, 2.4vw, 1.1rem);
    border: 2px solid #f9a8d4;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.65) inset,
        0 0 16px rgba(244, 114, 182, 0.45),
        0 0 32px rgba(251, 113, 133, 0.28),
        0 8px 22px rgba(244, 114, 182, 0.18);
    transform: translateX(-50%);
    opacity: 0;
    pointer-events: none;
    cursor: pointer;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    animation: video-actions-glow 2.4s ease-in-out infinite;
    transition: opacity 0.35s ease, transform 0.25s ease;
}

#video-birthday .video-actions.is-visible {
    opacity: 1;
    pointer-events: auto;
}

#video-birthday .video-actions:hover {
    transform: translateX(-50%) scale(1.04);
}

#video-birthday .video-actions:active {
    transform: translateX(-50%) scale(0.97);
}

@keyframes video-actions-glow {
    0%, 100% {
        border-color: #f9a8d4;
        box-shadow:
            0 0 0 1px rgba(255, 255, 255, 0.65) inset,
            0 0 14px rgba(244, 114, 182, 0.4),
            0 0 28px rgba(251, 113, 133, 0.22),
            0 8px 22px rgba(244, 114, 182, 0.16);
    }
    50% {
        border-color: #fb7185;
        box-shadow:
            0 0 0 1px rgba(255, 255, 255, 0.8) inset,
            0 0 22px rgba(244, 114, 182, 0.7),
            0 0 42px rgba(251, 113, 133, 0.42),
            0 10px 26px rgba(244, 114, 182, 0.24);
    }
}

#video-birthday .video-action-icon-wrap {
    display: block;
    opacity: 0;
    transform: translateY(18px) scale(0.86);
}

#video-birthday .video-action-icon {
    display: block;
    width: clamp(1.75rem, 5.8vw, 2.5rem);
    height: auto;
    filter: drop-shadow(0 4px 8px rgba(244, 114, 182, 0.2));
    pointer-events: none;
    user-select: none;
}

@media (hover: none) {
    #video-birthday .video-actions:hover {
        transform: translateX(-50%);
    }
}

.pink-glow {
    box-shadow: 0 0 40px -10px rgba(255, 143, 177, 0.55);
}

@keyframes border-rotate {
    100% { transform: rotate(360deg); }
}

@keyframes spin-soft {
    to { transform: rotate(360deg); }
}

.gradient-border-wrapper {
    position: relative;
    background: rgba(255, 255, 255, 0.3);
    padding: 5px;
    border-radius: 20px;
    overflow: hidden;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gradient-border-wrapper::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        from 180deg,
        #FFD6E7 0%,
        #FF8FB1 25%,
        #FFFFFF 50%,
        #FF8FB1 75%,
        #FFD6E7 100%
    );
    animation: border-rotate 8s linear infinite;
    z-index: 0;
}

.gradient-border-inner {
    position: relative;
    z-index: 5;
    background: #FFF0F5;
    border-radius: 16px;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.video-shell {
    width: min(94vw, calc((100dvh - 4.25rem) * 16 / 9), 920px);
    aspect-ratio: 16 / 9;
    max-height: calc(100dvh - 4.25rem);
    transition: width 0.25s ease, aspect-ratio 0.25s ease;
}

.video-shell.is-portrait {
    width: min(72vw, calc((100dvh - 4.25rem) * 9 / 16), 420px);
    aspect-ratio: 9 / 16;
}

@media (max-height: 500px) {
    .video-shell {
        width: min(94vw, calc((100dvh - 2.75rem) * 16 / 9), 920px);
        max-height: calc(100dvh - 2.75rem);
    }

    .video-shell.is-portrait {
        width: min(40vw, calc((100dvh - 2.75rem) * 9 / 16), 280px);
    }
}

.loader-ring {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255, 214, 231, 0.25);
    border-top-color: #FF8FB1;
    border-radius: 50%;
    animation: spin-soft 0.8s linear infinite;
}

#video-birthday input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 12px;
    width: 12px;
    border-radius: 50%;
    background: #FF8FB1;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(255, 143, 177, 0.8);
}

#fsRoot:fullscreen,
#fsRoot:-webkit-full-screen {
    width: 100%;
    height: 100%;
    border-radius: 0 !important;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

#fsRoot:fullscreen .fs-stage,
#fsRoot:-webkit-full-screen .fs-stage {
    position: relative;
    width: 100%;
    height: 100%;
    background: #000;
}

#fsRoot:fullscreen video,
#fsRoot:-webkit-full-screen video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 0;
}

#fsRoot:fullscreen.fs-rotate-landscape .fs-stage,
#fsRoot:-webkit-full-screen.fs-rotate-landscape .fs-stage {
    position: absolute;
    width: 100dvh;
    height: 100dvw;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(90deg);
    transform-origin: center center;
}

#fsRoot:fullscreen.fs-rotate-landscape,
#fsRoot:-webkit-full-screen.fs-rotate-landscape {
    overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
    #video-birthday {
        transition: none;
    }

    #video-birthday .video-actions {
        transition: none;
        animation: none;
    }

    .gradient-border-wrapper::before,
    .loader-ring {
        animation: none;
    }
}