/* Base Styles */
:root {
    --primary: #4a6fa5;
    --secondary: #166088;
    --dark: #0a1128;
    --light: #f5f5f5;
    --success: #28a745;
    --error: #dc3545;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #0a1128, #1a2a4a);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--dark);
}

.container {
    width: 100%;
    max-width: 600px;
}

/* Title Styles */
.title {
    text-align: center;
    margin-bottom: 30px;
    color: var(--light);
    font-size: 2.5rem;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 5px #fff, 0 0 10px #fff, 0 0 15px #4a6fa5, 0 0 20px #4a6fa5;
    }
    to {
        text-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px #166088, 0 0 40px #166088;
    }
}

/* Card Styles */
.card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: all 0.3s;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
    outline: none;
}

/* Button Styles */
.btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:hover {
    background: linear-gradient(to right, var(--secondary), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Message Styles */
.message {
    margin: 20px 0;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.3s;
}

.message.success {
    background-color: rgba(40, 167, 69, 0.2);
    color: var(--success);
    opacity: 1;
}

.message.error {
    background-color: rgba(220, 53, 69, 0.2);
    color: var(--error);
    opacity: 1;
}

/* Result Styles */
.result {
    margin-top: 20px;
    text-align: center;
}

.result p {
    margin-bottom: 10px;
    font-weight: 600;
}

.short-url {
    display: inline-block;
    margin-top: 10px;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    word-break: break-all;
}

.short-url:hover {
    text-decoration: underline;
}

/* Redirect Page Styles */
#redirectMessage {
    text-align: center;
    font-size: 18px;
    margin-bottom: 20px;
}

.error-message {
    color: var(--error);
    text-align: center;
    font-weight: 600;
}

/* Animations */
.fade-in {
    animation: fadeIn 0.8s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .card {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.8rem;
    }
    
    body {
        padding: 10px;
    }
}