.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.popup-overlay.is-open {
    display: flex;
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.popup-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: clamp(20px, 4vh, 45px) clamp(20px, 4vw, 40px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 480px;
    border-radius: 20px;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.popup-overlay.is-open .popup-content {
    animation: slideIn 0.4s ease-out;
}

.popup-content h2 {
    margin-bottom: clamp(12px, 2.5vh, 25px);
    font-size: clamp(20px, 3.5vh, 28px);
    color: #333;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.form-group {
    margin-bottom: clamp(10px, 2vh, 20px);
    width: 100%;
    text-align: left;
}

.popup-content .form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.popup-content .form-group input,
.popup-content .form-group textarea {
    width: 100%;
    padding: clamp(10px, 1.5vh, 14px) 16px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
    background: #fafafa;
}

.popup-content .form-group input:focus,
.popup-content .form-group textarea:focus {
    outline: none;
    border-color: #5cb85c;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(92, 184, 92, 0.1);
    transform: translateY(-2px);
}

.popup-content .form-group textarea {
    resize: vertical;
    min-height: clamp(70px, 12vh, 120px);
    line-height: 1.6;
}

.popup-content .form-group input[type="submit"] {
    background: linear-gradient(135deg, #5cb85c 0%, #4cae4c 100%);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    width: 100%;
    margin-top: clamp(4px, 1vh, 10px);
    padding: clamp(12px, 1.8vh, 16px);
    border-radius: 12px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(92, 184, 92, 0.3);
}

.popup-content .form-group input[type="submit"]:hover {
    background: linear-gradient(135deg, #4cae4c 0%, #449d44 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(92, 184, 92, 0.4);
}

.popup-content .form-group input[type="submit"]:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(92, 184, 92, 0.3);
}

button.popup-close {
    position: absolute;
    top: 20px;
    right: 20px;
    cursor: pointer;
    font-size: 28px;
    color: #999;
    transition: all 0.3s ease;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    padding: 0;
    line-height: 1;
}

button.popup-close:hover {
    color: #333;
    background: rgba(0, 0, 0, 0.1);
    transform: rotate(90deg);
}

/* Dark mode styles */
html.dark-mode .popup-overlay {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
}

html.dark-mode .popup-content {
    background: rgba(36, 39, 58, 0.9);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    color: #cad3f5;
    border: 1px solid rgba(138, 173, 244, 0.3);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.6);
}

html.dark-mode .popup-content h2 {
    color: #cad3f5;
    text-shadow: 0 2px 10px rgba(138, 173, 244, 0.3);
}

html.dark-mode .popup-content .form-group label {
    color: #b8c0e0;
}

html.dark-mode .popup-content .form-group input,
html.dark-mode .popup-content .form-group textarea {
    background: #1e2130;
    color: #cad3f5;
    border: 2px solid #363a4f;
}

html.dark-mode .popup-content .form-group input:focus,
html.dark-mode .popup-content .form-group textarea:focus {
    border-color: #8aadf4;
    background: #24273a;
    box-shadow: 0 0 0 3px rgba(138, 173, 244, 0.15);
}

html.dark-mode .popup-content .form-group input::placeholder,
html.dark-mode .popup-content .form-group textarea::placeholder {
    color: #6e738d;
}

html.dark-mode .popup-content .form-group input[type="submit"] {
    background: linear-gradient(135deg, #8aadf4 0%, #7096d6 100%);
    color: #24273a;
    box-shadow: 0 4px 15px rgba(138, 173, 244, 0.4);
}

html.dark-mode .popup-content .form-group input[type="submit"]:hover {
    background: linear-gradient(135deg, #7096d6 0%, #5e82c0 100%);
    box-shadow: 0 6px 20px rgba(138, 173, 244, 0.5);
}

html.dark-mode button.popup-close {
    color: #b8c0e0;
    background: rgba(138, 173, 244, 0.1);
}

html.dark-mode button.popup-close:hover {
    color: #cad3f5;
    background: rgba(138, 173, 244, 0.2);
}