:root {
    --primary-color: #FFE600;
    --secondary-color: #2E2E38;
    --hover-color: #FFF04B;
    --background: #121212;
    --surface: #212121;
    --text: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --error: #ff4444;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    max-width: 400px;
    width: 90%;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 2rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input {
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: var(--text);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(255, 230, 0, 0.2);
}

.error-message {
    color: var(--error);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: none;
}

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

.login-btn {
    padding: 0.8rem;
    background: var(--primary-color);
    color: #000;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.login-btn:hover {
    background: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 230, 0, 0.3);
}

.login-btn:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    transform: none;
}

.login-btn .spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.3);
    border-top-color: #000;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.login-btn.loading .spinner {
    display: block;
}

.login-btn.loading span {
    visibility: hidden;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@media (max-width: 480px) {
    .login-container {
        width: 95%;
        padding: 1.5rem;
    }

    .login-header h1 {
        font-size: 1.75rem;
    }
}