/*
 * Estilos globales para el portafolio personal de Christian González.
 * Enfoque mobile-first con variables CSS para mantener una paleta consistente.
 */

:root {
    --color-primary: #1f5eff;
    --color-primary-dark: #123fad;
    --color-secondary: #0f172a;
    --color-background: #f4f7fb;
    --color-surface: #ffffff;
    --color-muted: #64748b;
    --color-accent: #38bdf8;
    --color-border: rgba(15, 23, 42, 0.1);
    --font-family: 'Poppins', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1100px;
    --transition-base: 200ms ease-in-out;
}

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

body {
    font-family: var(--font-family);
    color: var(--color-secondary);
    background-color: var(--color-background);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover,
a:focus {
    color: var(--color-primary);
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(244, 247, 251, 0.8);
    border-bottom: 1px solid var(--color-border);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.logo {
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
}

.nav-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 0.3rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.nav-toggle__line {
    width: 1.5rem;
    height: 2px;
    background-color: var(--color-secondary);
    transition: transform var(--transition-base);
}

.navigation {
    position: absolute;
    top: 100%;
    right: 1rem;
    background-color: var(--color-surface);
    border-radius: 0.75rem;
    border: 1px solid var(--color-border);
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.12);
    padding: 1rem 1.25rem;
    transform-origin: top right;
    transform: scale(0.9);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.navigation.is-open {
    transform: scale(1);
    opacity: 1;
    visibility: visible;
}

.navigation__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-weight: 500;
}

.navigation__list a {
    padding: 0.35rem 0.5rem;
    border-radius: 0.5rem;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.navigation__list a:focus-visible,
.navigation__list a:hover {
    background-color: rgba(31, 94, 255, 0.08);
    color: var(--color-primary);
}

.hero {
    display: grid;
    gap: 2rem;
    align-items: center;
    padding: 5rem 1.5rem 3rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.hero__content {
    display: grid;
    gap: 1rem;
}

.hero__greeting {
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.85rem;
}

.hero__title {
    font-size: clamp(2.2rem, 6vw, 3.2rem);
    line-height: 1.1;
}

.hero__subtitle {
    font-size: clamp(1.1rem, 4vw, 1.6rem);
    font-weight: 500;
    color: var(--color-muted);
}

.hero__description {
    color: var(--color-secondary);
    max-width: 40ch;
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero__figure {
    display: flex;
    justify-content: center;
}

.hero__image {
    width: min(320px, 70vw);
    border-radius: 1.5rem;
    border: 4px solid rgba(56, 189, 248, 0.4);
    box-shadow: 0 25px 45px rgba(31, 94, 255, 0.15);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border: none;
    cursor: pointer;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.button:hover,
.button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(31, 94, 255, 0.2);
}

.button--secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid rgba(31, 94, 255, 0.4);
}

.section {
    padding: 4rem 1.5rem;
}

.section--alternate {
    background-color: rgba(31, 94, 255, 0.05);
}

.section__header {
    text-align: center;
    display: grid;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.section__header h2 {
    font-size: clamp(1.8rem, 5vw, 2.4rem);
}

.about {
    display: grid;
    gap: 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.card {
    background-color: var(--color-surface);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
    border: 1px solid rgba(15, 23, 42, 0.05);
    display: grid;
    gap: 0.75rem;
}

.card--highlight {
    border-left: 4px solid var(--color-primary);
}

.tag-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-list li {
    background-color: rgba(31, 94, 255, 0.1);
    color: var(--color-primary);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.9rem;
}

.projects-grid {
    display: grid;
    gap: 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.project-card {
    background: var(--color-surface);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid rgba(15, 23, 42, 0.05);
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
    display: grid;
    gap: 0.75rem;
}

.project-card__link {
    font-weight: 500;
    color: var(--color-primary);
}

.project-card__link::after {
    content: ' →';
    transition: transform var(--transition-base);
}

.project-card__link:hover::after {
    transform: translateX(3px);
}

.blog-placeholder {
    max-width: var(--max-width);
    margin: 0 auto;
    background-color: var(--color-surface);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    border: 1px dashed rgba(15, 23, 42, 0.2);
    color: var(--color-muted);
    font-weight: 500;
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--color-surface);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
    border: 1px solid rgba(15, 23, 42, 0.05);
    display: grid;
    gap: 1.25rem;
}

.form-group {
    display: grid;
    gap: 0.5rem;
}

label {
    font-weight: 500;
}

input,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--color-border);
    background-color: rgba(255, 255, 255, 0.9);
    font-family: inherit;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(31, 94, 255, 0.15);
}

.form-error {
    color: #ef4444;
    font-size: 0.85rem;
    min-height: 1.1rem;
}

.form-success {
    color: #16a34a;
    font-weight: 500;
    min-height: 1.1rem;
}

.footer {
    background-color: var(--color-secondary);
    color: rgba(255, 255, 255, 0.85);
    padding: 2rem 1.5rem;
}

.footer__content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    text-align: center;
}

.social-list {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.social-list a {
    color: rgba(255, 255, 255, 0.85);
    transition: color var(--transition-base);
}

.social-list a:hover,
.social-list a:focus {
    color: var(--color-accent);
}

/*
 * Responsividad: Escalamos gradualmente la maquetación a pantallas mayores.
 */

@media (min-width: 768px) {
    .navigation {
        position: static;
        background: transparent;
        box-shadow: none;
        border: none;
        padding: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .navigation__list {
        flex-direction: row;
        gap: 1.5rem;
    }

    .nav-toggle {
        display: none;
    }

    .hero {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding-top: 6rem;
    }

    .hero__content {
        order: 0;
    }

    .hero__figure {
        justify-content: flex-end;
    }

    .about {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .projects-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .footer__content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}