:root {
    --bg-color: #f8f9fa; /* Color de fondo claro similar a canvas de excalidraw */
    --text-color: #1a1a1a;
    --border-color: #1e1e1e;
    --accent-color: #e0f2fe; /* Azul clarito */
    --accent-color-hover: #bae6fd;
    --card-bg: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.15);
}

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

*:focus-visible {
    outline: 3px dashed var(--border-color);
    outline-offset: 4px;
    border-radius: 8px;
}

body {
    background-color: var(--bg-color);
    background-image: radial-gradient(#d1d5db 2px, transparent 2px);
    background-size: 24px 24px;
    color: var(--text-color);
    font-family: 'Kalam', cursive, 'Comic Sans MS', sans-serif;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.container {
    max-width: 800px;
    width: 100%;
}

/* Efecto dibujado a mano para bordes */
.sketch-border {
    border: 3px solid var(--border-color);
    border-radius: 255px 15px 225px 15px/15px 225px 15px 255px;
}

/* Encabezado */
.header {
    margin-bottom: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    font-size: 1.8rem;
    background-color: var(--card-bg);
}

.subtitle {
    font-size: 1.3rem;
    color: #4a4a4a;
}

/* Tarjetas (Cards) */
.content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .content {
        grid-template-columns: repeat(2, 1fr);
    }
}

.card {
    background-color: var(--card-bg);
    padding: 2rem;
    border: 3px solid var(--border-color);
    /* Borde irregular para simular trazo de marcador */
    border-radius: 255px 15px 225px 15px/15px 225px 15px 255px;
    /* Sombra dura estilo diseño brutalista/sketch */
    box-shadow: 6px 6px 0px var(--border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0px var(--border-color);
}

.card h2 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.card p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.info-box {
    grid-column: 1 / -1;
    background-color: #fef08a;
    padding: 1rem;
    border: 3px solid var(--border-color);
    border-radius: 15px 225px 15px 255px/255px 15px 225px 15px;
    box-shadow: 4px 4px 0px var(--border-color);
    text-align: center;
}

.info-box p {
    font-size: 1.2rem;
    margin: 0;
}

/* Botones */
.button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    font-size: 1.2rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--text-color);
    border: 3px solid var(--border-color);
    border-radius: 15px 225px 15px 255px/255px 15px 225px 15px;
    background-color: var(--accent-color);
    transition: all 0.2s;
    cursor: pointer;
    box-shadow: 3px 3px 0px var(--border-color);
}

.button:hover {
    background-color: var(--accent-color-hover);
    transform: translate(-1px, -1px) rotate(2deg);
    box-shadow: 4px 4px 0px var(--border-color);
}

.button:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--border-color);
}

.button-secondary {
    background-color: #a7f3d0; /* Verde clarito */
}

.button-secondary:hover {
    background-color: #6ee7b7;
    transform: translate(-1px, -1px) rotate(-2deg);
}

/* Pie de página */
.footer {
    margin-top: 4rem;
    text-align: center;
    font-size: 1.3rem;
}

.author-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: bold;
    border-bottom: 2px solid var(--border-color);
    transition: color 0.2s;
}

.author-link:hover {
    color: #2563eb;
    border-bottom-color: #2563eb;
}

.heart {
    color: #ef4444;
}

/* Responsividad para móviles */
@media (max-width: 600px) {
    body {
        padding: 1rem;
    }
    .card {
        padding: 1.5rem;
    }
    .title {
        font-size: 1.8rem;
        flex-direction: column;
        text-align: center;
    }
}