* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

:root {
    --primary-color: #35D0F2;
    --primary-dark: #20b8d9;
    --primary-light: #5cdaf5;
    --primary-very-light: #e5f9fd;
    --text-color: #333;
    --text-secondary: #666;
    --background: #f8fdfe;
    --card-background: #ffffff;
    --error-color: #ff4d4f;
    --success-color: #52c41a;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(53, 208, 242, 0.15);
    --transition: all 0.2s ease;
}

body {
    background-color: var(--background);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 400px;
    transition: var(--transition);
}

.card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 40px 30px;
    width: 100%;
    transition: var(--transition);
}

.logo {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 24px;
}

.logo.small {
    width: 36px;
    height: 36px;
    font-size: 16px;
    margin: 0;
}

h1 {
    color: var(--text-color);
    margin-bottom: 12px;
    font-size: 24px;
    font-weight: 600;
    text-align: center;
}

p {
    margin-bottom: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 400;
}

.input-group {
    margin-bottom: 24px;
}

input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #eaeaea;
    border-radius: var(--border-radius);
    font-size: 15px;
    transition: var(--transition);
    background-color: #f9f9f9;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: white;
    box-shadow: 0 0 0 3px rgba(53, 208, 242, 0.2);
}

input::placeholder {
    color: #aaa;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(53, 208, 242, 0.3);
}

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

.error-message {
    color: var(--error-color);
    margin-top: 16px;
    text-align: center;
    min-height: 20px;
    font-size: 14px;
}

.hidden {
    display: none;
    opacity: 0;
    transform: translateY(10px);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.btn-logout {
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-logout:hover {
    background-color: var(--primary-very-light);
    color: var(--primary-color);
}

.balance-container {
    background-color: var(--primary-very-light);
    border-radius: var(--border-radius);
    padding: 30px;
    margin: 30px 0;
    text-align: center;
    transition: var(--transition);
}

.balance {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.balance-label {
    margin-bottom: 0;
    font-size: 14px;
}

.info-container {
    border-top: 1px solid #f0f0f0;
    padding-top: 20px;
    font-size: 14px;
}

.info-container p {
    text-align: left;
    color: var(--text-secondary);
    margin-bottom: 0;
}

@media (max-width: 480px) {
    .card {
        padding: 30px 20px;
    }
    
    .balance {
        font-size: 32px;
    }
    
    .balance-container {
        padding: 24px;
    }
}

/* Animaciones */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container:not(.hidden) {
    animation: fadeIn 0.3s ease forwards;
}