:root {
    --color-primary: #0066CC;
    --color-primary-dark: #004BA0;
    --color-primary-light: #E6F0FF;
    --color-text: #1A1A1A;
    --color-text-light: #666666;
    --color-bg: #FFFFFF;
    --color-bg-light: #F8F9FA;
    --color-border: #E0E0E0;
    --color-success: #10B981;
    --color-error: #EF4444;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
    --transition: all 0.3s ease;
}

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

html, body {
    width: 100%;
    height: 100%;
}

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

.container {
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-primary) 0%, #0052A3 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Botones */
.btn {
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
    box-shadow: var(--shadow-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0052A3 100%);
    color: white;
    margin-bottom: 2rem;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #003D7A 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

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

/* Estado */
.status {
    margin-top: 2rem;
    padding: 1rem;
    border-radius: 8px;
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
}

.status-text {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin: 0;
}

.status-text.success {
    color: var(--color-success);
    font-weight: 600;
}

.status-text.error {
    color: var(--color-error);
    font-weight: 600;
}

/* Responsive */
@media (max-width: 640px) {
    .title {
        font-size: 2.5rem;
        margin-bottom: 2rem;
    }

    .btn {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}