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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.login-container {
    position: relative;
    width: 100%;
    max-width: 450px;
    padding: 20px;
    z-index: 1;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    padding: 50px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    position: relative;
    overflow: hidden;
    animation: cardEntrance 1s ease-out;
    backdrop-filter: blur(10px);
}

@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-title {
    font-size: 2.5em;
    color: #667eea;
    margin-bottom: 10px;
    animation: bounce 2s infinite;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.login-subtitle {
    font-size: 1.1em;
    color: #666;
    margin-bottom: 30px;
}

.login-form {
    margin-top: 30px;
}

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

.password-input {
    width: 100%;
    padding: 15px 20px;
    font-size: 1.1em;
    border: 2px solid #e0e0e0;
    border-radius: 15px;
    outline: none;
    transition: all 0.3s ease;
    background: #fff;
}

.password-input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-button {
    width: 100%;
    padding: 15px;
    font-size: 1.2em;
    font-weight: bold;
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

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

.error-message {
    margin-top: 20px;
    padding: 12px;
    background: #fee;
    color: #c33;
    border-radius: 10px;
    font-size: 0.95em;
    display: none;
    animation: shake 0.5s ease;
}

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

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

.stars, .stars2, .stars3 {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.stars {
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #fff, transparent),
        radial-gradient(2px 2px at 60px 70px, #fff, transparent),
        radial-gradient(1px 1px at 50px 50px, #fff, transparent),
        radial-gradient(1px 1px at 80px 10px, #fff, transparent),
        radial-gradient(2px 2px at 90px 40px, #fff, transparent),
        radial-gradient(1px 1px at 33px 60px, #fff, transparent),
        radial-gradient(2px 2px at 10px 80px, #fff, transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: sparkle 3s linear infinite;
    opacity: 0.6;
}

.stars2 {
    background-image: 
        radial-gradient(1px 1px at 15px 25px, #fff, transparent),
        radial-gradient(1px 1px at 55px 65px, #fff, transparent),
        radial-gradient(2px 2px at 45px 45px, #fff, transparent),
        radial-gradient(1px 1px at 75px 5px, #fff, transparent),
        radial-gradient(1px 1px at 85px 35px, #fff, transparent);
    background-repeat: repeat;
    background-size: 150px 80px;
    animation: sparkle 4s linear infinite reverse;
    opacity: 0.4;
}

.stars3 {
    background-image: 
        radial-gradient(2px 2px at 25px 35px, #fff, transparent),
        radial-gradient(1px 1px at 65px 75px, #fff, transparent),
        radial-gradient(1px 1px at 55px 55px, #fff, transparent);
    background-repeat: repeat;
    background-size: 180px 90px;
    animation: sparkle 5s linear infinite;
    opacity: 0.5;
}

@keyframes sparkle {
    from { transform: translateY(0); }
    to { transform: translateY(-100px); }
}

@media (max-width: 768px) {
    .login-container {
        padding: 15px;
        max-width: 100%;
    }
    
    .login-card {
        padding: 35px 25px;
        border-radius: 25px;
    }
    
    .login-title {
        font-size: 1.8em;
        margin-bottom: 8px;
    }
    
    .login-subtitle {
        font-size: 1em;
        margin-bottom: 25px;
    }
    
    .password-input {
        padding: 12px 18px;
        font-size: 1em;
    }
    
    .login-button {
        padding: 12px;
        font-size: 1.1em;
    }
    
    .error-message {
        font-size: 0.9em;
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 10px;
    }
    
    .login-card {
        padding: 30px 20px;
        border-radius: 20px;
    }
    
    .login-title {
        font-size: 1.5em;
    }
    
    .login-subtitle {
        font-size: 0.95em;
        margin-bottom: 20px;
    }
    
    .password-input {
        padding: 12px 15px;
        font-size: 0.95em;
    }
    
    .login-button {
        padding: 12px;
        font-size: 1em;
    }
}