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

/* Variables de tema oscuro (por defecto) */
:root,
[data-theme="dark"] {
    --bg-color: #0a0a0a;
    --text-color: #f5f5f5;
    --text-muted: #666;
    --card-bg: #111;
    --card-border: #1a1a1a;
    --card-hover: #1a1a1a;
    --card-hover-border: #333;
    --icon-color: #888;
    --avatar-border: #222;
}

/* Variables de tema claro */
[data-theme="light"] {
    --bg-color: #f5f5f5;
    --text-color: #1a1a1a;
    --text-muted: #666;
    --card-bg: #fff;
    --card-border: #e0e0e0;
    --card-hover: #f0f0f0;
    --card-hover-border: #ccc;
    --icon-color: #555;
    --avatar-border: #ddd;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--card-hover);
    border-color: var(--card-hover-border);
    transform: scale(1.05);
}

.theme-toggle i {
    font-size: 1.1rem;
    color: var(--icon-color);
    transition: color 0.2s ease;
}

.theme-toggle:hover i {
    color: var(--text-color);
}

.container {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
}

.profile {
    text-align: center;
    margin-bottom: 2.5rem;
}

.avatar {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    border: 2px solid var(--avatar-border);
    margin: 0 auto 1.5rem;
    object-fit: cover;
    transition: border-color 0.3s ease;
}

h1 {
    font-size: 1.75rem;
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 300;
}

.links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.link-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.2s ease;
}

.link-item:hover {
    background-color: var(--card-hover);
    border-color: var(--card-hover-border);
    transform: translateY(-2px);
}

.link-item i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
    color: var(--icon-color);
    transition: color 0.2s ease;
}

.link-item:hover i {
    color: var(--text-color);
}

.link-item span {
    font-size: 0.95rem;
    font-weight: 400;
}

/* Colores de marca al hover */
.link-item:hover .fa-linkedin { color: #0a66c2; }
.link-item:hover .fa-youtube { color: #ff0000; }

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

    h1 {
        font-size: 1.5rem;
    }

    .avatar {
        width: 110px;
        height: 110px;
    }

    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }
}