/* Modal Popup */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(17, 17, 17, 0.45);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--c-white);
    border: 1px solid var(--c-mint);
    border-top: 4px solid var(--c-emerald);
    padding: 3rem;
    border-radius: 24px;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 40px rgba(13, 122, 95, 0.12);
    position: relative;
    transform: scale(0.95) translateY(10px);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.btn-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--c-gray-mid);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--t-slow);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-close:hover {
    background: var(--c-gray-light);
    color: var(--c-black);
}

.modal-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.modal-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--c-black);
    margin-bottom: 0.5rem;
}

.modal-subtitle {
    font-size: 0.95rem;
    color: var(--c-gray-mid);
}

/* Form Controls */
.form-group {
    position: relative;
    margin-bottom: 1.8rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--c-emerald-deep);
}

.form-input {
    width: 100%;
    background: var(--c-gray-light);
    border: 1px solid transparent;
    padding: 0.9rem 1.2rem;
    border-radius: 12px;
    color: var(--c-black);
    font-size: 1rem;
    outline: none;
    transition: var(--t-slow);
}

.form-input:focus {
    border-color: var(--c-emerald);
    box-shadow: 0 0 10px rgba(13, 122, 95, 0.15);
    background: var(--c-white);
}

/* Submit Button */
.btn-submit {
    width: 100%;
    background: var(--c-emerald);
    color: var(--c-white);
    border: none;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--t-slow);
    box-shadow: 0 4px 12px rgba(13, 122, 95, 0.2);
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.btn-submit:hover {
    background: var(--c-emerald-deep);
    box-shadow: 0 6px 20px rgba(13, 122, 95, 0.35);
    transform: translateY(-2px);
}

.btn-submit:active {
    transform: translateY(0);
}

/* Alert Notification */
.alert {
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    display: none;
    animation: slideDown 0.3s ease-out;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #ef4444;
    display: block;
}

/* Loader Animation */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--c-white);
    animation: spin 0.8s linear infinite;
    display: none;
}

.btn-submit.loading .spinner {
    display: inline-block;
}
.btn-submit.loading .btn-text {
    display: none;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

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