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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

/* Background slideshow container */
.bg-slideshow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.bg-slideshow::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

/* Individual background slides */
.bg-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    animation: slideshow 18s infinite;
}

.bg-slide:nth-child(1) {
    background-image: url('assets/login-bg-1.jpg');
    animation-delay: 0s;
}

.bg-slide:nth-child(2) {
    background-image: url('assets/login-bg-2.jpg');
    animation-delay: 6s;
}

.bg-slide:nth-child(3) {
    background-image: url('assets/login-bg-3.jpg');
    animation-delay: 12s;
}

.bg-slide:nth-child(4) {
    background-image: url('assets/login-bg-4.jpg');
    animation-delay: 18s;
}

@keyframes slideshow {
    0% {
        opacity: 0;
        transform: scale(1);
    }
    5% {
        opacity: 1;
    }
    33% {
        opacity: 1;
    }
    38% {
        opacity: 0;
        transform: scale(1.05);
    }
    100% {
        opacity: 0;
        transform: scale(1);
    }
}

.login-container {
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    max-width: 450px;
    width: 100%;
    animation: slideUp 0.5s ease-out;
    position: relative;
    z-index: 2;
}

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

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 40px 30px;
    text-align: center;
    color: white;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.login-header p {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 300;
}

.login-body {
    padding: 40px 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f8f9fa;
    color: #333;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder {
    color: #999;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
    margin-top: 10px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

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

.error-message {
    background: #fee;
    color: #c33;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    border-left: 4px solid #c33;
    display: none;
}

.error-message.show {
    display: block;
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.success-message {
    background: #efe;
    color: #3c3;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    border-left: 4px solid #3c3;
    display: none;
}

.success-message.show {
    display: block;
}

.login-footer {
    text-align: center;
    padding: 20px 30px;
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
    font-size: 13px;
    color: #666;
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-container {
        border-radius: 15px;
    }
    
    .login-header {
        padding: 30px 20px;
    }
    
    .login-header h1 {
        font-size: 24px;
    }
    
    .login-body {
        padding: 30px 20px;
    }
}