.fiu-anniversary-popup {
    --anniversary-primary: #6EABA5;
    --anniversary-secondary: #4A9B94;
    --anniversary-dark: #2d7a73;
    --anniversary-light: #e8f4f2;
}

.fiu-anniversary-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.33, 0.66, 0.66, 1);
}

.fiu-anniversary-overlay.fiu-show {
    opacity: 1;
    visibility: visible;
}

.fiu-anniversary-container {
    position: relative;
    width: 90%;
    max-width: 500px;
    background: linear-gradient(135deg, #ffffff 0%, var(--anniversary-light) 100%);
    border-radius: 20px;
    box-shadow:
        0 10px 40px rgba(110, 171, 165, 0.15),
        0 0 0 1px rgba(110, 171, 165, 0.1);
    padding: 40px 30px;
    animation: fiu-pop-in 0.5s cubic-bezier(0.33, 0.66, 0.66, 1);
}

@keyframes fiu-pop-in {
    0% {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.fiu-anniversary-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(110, 171, 165, 0.1);
    color: var(--anniversary-primary);
    font-size: 20px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 1;
}

.fiu-anniversary-close:hover {
    background: rgba(110, 171, 165, 0.2);
    transform: rotate(90deg);
}

.fiu-anniversary-content {
    text-align: center;
}

.fiu-anniversary-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
    animation: fiu-bounce 2s infinite;
}

@keyframes fiu-bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.fiu-anniversary-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--anniversary-dark);
    margin: 0 0 12px 0;
    line-height: 1.2;
}

.fiu-anniversary-subtitle {
    font-size: 16px;
    color: var(--anniversary-secondary);
    margin: 0 0 28px 0;
    font-weight: 500;
}

.fiu-anniversary-subtitle strong {
    color: var(--anniversary-primary);
    font-weight: 700;
}

.fiu-countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin: 28px 0;
    padding: 20px;
    background: rgba(110, 171, 165, 0.08);
    border-radius: 15px;
    border: 1px solid rgba(110, 171, 165, 0.15);
}

.fiu-countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 50px;
}

.fiu-countdown-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--anniversary-primary);
    line-height: 1;
}

.fiu-countdown-label {
    font-size: 11px;
    color: var(--anniversary-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.fiu-countdown-separator {
    font-size: 20px;
    font-weight: 700;
    color: var(--anniversary-primary);
    opacity: 0.5;
}

.fiu-anniversary-description {
    font-size: 14px;
    color: #555;
    margin: 0 0 24px 0;
    line-height: 1.6;
}

.fiu-anniversary-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.fiu-anniversary-btn-primary,
.fiu-anniversary-btn-secondary {
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.fiu-anniversary-btn-primary {
    background: linear-gradient(135deg, var(--anniversary-primary) 0%, var(--anniversary-secondary) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(110, 171, 165, 0.3);
}

.fiu-anniversary-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(110, 171, 165, 0.4);
}

.fiu-anniversary-btn-primary:active {
    transform: translateY(0);
}

.fiu-anniversary-btn-secondary {
    background: rgba(110, 171, 165, 0.1);
    color: var(--anniversary-primary);
    border: 1px solid rgba(110, 171, 165, 0.3);
}

.fiu-anniversary-btn-secondary:hover {
    background: rgba(110, 171, 165, 0.15);
    border-color: rgba(110, 171, 165, 0.5);
}

.fiu-anniversary-btn-secondary:active {
    background: rgba(110, 171, 165, 0.2);
}

@media (max-width: 640px) {
    .fiu-anniversary-container {
        max-width: 85%;
        padding: 32px 20px;
    }

    .fiu-anniversary-title {
        font-size: 24px;
    }

    .fiu-anniversary-subtitle {
        font-size: 14px;
    }

    .fiu-countdown {
        gap: 4px;
        padding: 16px;
    }

    .fiu-countdown-item {
        min-width: 40px;
    }

    .fiu-countdown-number {
        font-size: 20px;
    }

    .fiu-countdown-separator {
        font-size: 16px;
    }

    .fiu-anniversary-description {
        font-size: 13px;
        margin-bottom: 18px;
    }

    .fiu-anniversary-actions {
        gap: 10px;
    }

    .fiu-anniversary-btn-primary,
    .fiu-anniversary-btn-secondary {
        padding: 12px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .fiu-anniversary-container {
        max-width: calc(100% - 20px);
        padding: 24px 16px;
        border-radius: 16px;
    }

    .fiu-anniversary-close {
        width: 32px;
        height: 32px;
        font-size: 18px;
    }

    .fiu-anniversary-icon {
        font-size: 40px;
        margin-bottom: 16px;
    }

    .fiu-anniversary-title {
        font-size: 20px;
        margin-bottom: 8px;
    }

    .fiu-anniversary-subtitle {
        font-size: 12px;
        margin-bottom: 20px;
    }

    .fiu-countdown {
        gap: 2px;
        margin: 20px 0;
        padding: 12px;
    }

    .fiu-countdown-item {
        min-width: 35px;
    }

    .fiu-countdown-number {
        font-size: 18px;
    }

    .fiu-countdown-label {
        font-size: 9px;
    }

    .fiu-countdown-separator {
        font-size: 14px;
    }

    .fiu-anniversary-description {
        font-size: 12px;
        margin-bottom: 16px;
    }

    .fiu-anniversary-actions {
        gap: 8px;
    }

    .fiu-anniversary-btn-primary,
    .fiu-anniversary-btn-secondary {
        padding: 11px 16px;
        font-size: 13px;
    }
}