/* Main Layout and Container Improvements */
.registration-container {
    max-width: 600px;
    margin: 5rem auto;
    padding: 2rem;
}

/* Panel Improvements */
.panel {
    background: rgba(26, 26, 26, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #007AFF, #5AC8FA);
    opacity: 0.8;
}

.panel:hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 4px;
    background: linear-gradient(to right, #5AC8FA, #007AFF);
    opacity: 0.8;
    animation: borderExpand 0.5s forwards;
}

@keyframes borderExpand {
    0% {
        width: 0;
    }
    100% {
        width: 100%;
    }
}

.panel-body {
    padding: 2.5rem;
}

.panel-body h2 {
    font-size: 2.5rem;
    color: #fff;
    margin-bottom: 1.8rem;
    text-align: center;
    background: linear-gradient(to right, #007AFF, #5AC8FA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

/* Form Elements Improvements */
.form-group {
    margin-bottom: 1.8rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 1rem;
}

.form-control {
    width: 100%;
    padding: 1.2rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: rgba(0, 122, 255, 0.5);
    background-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

/* Button Improvements */
.btn {
    padding: 1rem 0;
    width: 100%;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    line-height: 1.5;
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
}

/* Using the .nav-links a hover effect */
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.4s ease-in-out;
}

.btn:hover::before {
    left: 100%;
}

.btn i {
    margin-right: 1.2rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(to right, #007AFF, #5AC8FA);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(to right, #0062CC, #4BA8F5);
}

/* Link Styling */
.form-group p {
    margin-top: 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    text-align: center;
}

.form-group p a {
    color: #007AFF;
    text-decoration: none;
    transition: color 0.3s ease;
    position: relative;
    font-weight: 500;
}

.form-group p a:hover {
    color: #5AC8FA;
}

.form-group p a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: linear-gradient(to right, #007AFF, #5AC8FA);
    transition: width 0.3s ease;
}

.form-group p a:hover::after {
    width: 100%;
}

/* Alert Messages */
.message {
    position: fixed;
    top: 30px;
    right: 30px;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    z-index: 1000;
    max-width: 400px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    font-weight: 500;
    border-left: 5px solid;
    animation: messageAnimation 5s forwards;
}

@keyframes messageAnimation {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }
    10% {
        opacity: 1;
        transform: translateY(0);
    }
    90% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-20px);
    }
}

.success-message {
    background: rgba(40, 167, 69, 0.9);
    border-left-color: #1d8036;
    color: white;
    backdrop-filter: blur(10px);
}

.error-message {
    background: rgba(220, 53, 69, 0.9);
    border-left-color: #a71d2a;
    color: white;
    backdrop-filter: blur(10px);
}

.success-icon, .error-icon {
    margin-right: 1.2rem;
    font-size: 1.3rem;
}

/* Optional: Animation for the login panel */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.panel {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .registration-container {
        padding: 1.5rem;
        margin: 3rem auto;
    }
    
    .panel-body {
        padding: 1.8rem;
    }
    
    .panel-body h2 {
        font-size: 2rem;
    }
    
    .message {
        left: 15px;
        right: 15px;
        width: auto;
    }
}

@media (max-width: 480px) {
    .registration-container {
        padding: 1rem;
        margin: 2rem auto;
    }
    
    .panel-body {
        padding: 1.2rem;
    }
    
    .panel-body h2 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 0.9rem 0;
        font-size: 1rem;
    }
}

/* Custom scrollbar for better UX */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 122, 255, 0.5);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 122, 255, 0.7);
}