* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 450px;
    animation: fadeIn 0.6s ease-out;
}

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

.login-box {
    background: rgba(255, 255, 255, 0.98);
    border-radius: 20px;
    padding: 50px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.logo {
    text-align: center;
    margin-bottom: 40px;
}

.logo h1 {
    color: #0f4c75;
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

.logo p {
    color: #666;
    font-size: 1.1em;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    color: #333;
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus {
    outline: none;
    border-color: #3282b8;
    background: white;
    box-shadow: 0 0 0 4px rgba(50, 130, 184, 0.1);
}

button[type="submit"] {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #0f4c75 0%, #3282b8 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-top: 10px;
}

button[type="submit"]:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(50, 130, 184, 0.4);
}

button[type="submit"]:active:not(:disabled) {
    transform: translateY(0);
}

button[type="submit"]:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
    margin-left: 10px;
    vertical-align: middle;
}

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

.hidden {
    display: none !important;
}

.error-message {
    background: #ff4444;
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 14px;
    text-align: center;
    font-weight: 500;
}

.error-message.shake {
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

.footer {
    margin-top: 30px;
    text-align: center;
}

.footer p {
    color: #999;
    font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
    .login-box {
        padding: 40px 30px;
    }

    .logo h1 {
        font-size: 2em;
    }

    .logo p {
        font-size: 1em;
    }
}

@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }

    .logo h1 {
        font-size: 1.8em;
    }
}