/* /// CSS VARIABLES (DARK THEME) /// */
:root {
    --color-primary: #10b981; /* A vibrant green accent */
    --color-primary-dark: #059669;
    --color-text: #d1d5db; /* Light gray for text */
    --color-text-strong: #f9fafb; /* Near-white for headings */
    --color-background: #111827; /* Very dark blue/gray */
    --color-surface: #1f2937; /* Slightly lighter surface for cards/header */
    --color-border: #374151;
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --max-width: 896px;
}

/* /// RESET & BASE STYLES /// */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family-base);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
    line-height: 1.3;
    font-weight: 800; /* Bolder headings */
    margin-bottom: 1.5rem;
    color: var(--color-text-strong);
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2.25rem; }
p { margin-bottom: 1.5rem; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary-dark); text-decoration: underline; }
ul { list-style-position: inside; margin-bottom: 1.5rem; padding-left: 1rem; }
li { margin-bottom: 0.75rem; }
strong { color: var(--color-text-strong); }
blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: 1.5rem;
    margin: 2.5rem 0;
    font-style: italic;
    font-size: 1.125rem;
    color: var(--color-text);
}
cite { display: block; margin-top: 1rem; font-style: normal; font-weight: 600; }

/* /// LAYOUT & CONTAINER /// */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
}

/* /// HEADER & NAVIGATION /// */
.header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 20;
}
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    padding-bottom: 1rem;
}
.logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-text-strong);
}
.logo:hover { text-decoration: none; }
.desktop-nav { display: none; }
.nav-link { margin-left: 1.5rem; font-weight: 500; color: var(--color-text); }
.nav-link:hover { color: var(--color-text-strong); text-decoration: none; }
.hamburger { background: none; border: none; cursor: pointer; color: var(--color-text); }
.mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
}
.mobile-menu.is-active {
    max-height: 200px;
}
.mobile-nav-link {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--color-text);
}
.mobile-nav-link:hover {
    background-color: var(--color-background);
    color: var(--color-text-strong);
    text-decoration: none;
}

/* /// ARTICLE STYLES /// */
.article-content { padding: 2.5rem 0; }
.article-header .category { color: var(--color-primary); font-weight: 600; text-transform: uppercase; font-size: 0.875rem; }
.article-header h1 { margin-top: 0.5rem; }
.article-header .meta { color: var(--color-text); font-size: 1.125rem; }
.article-figure { margin: 2.5rem 0; }
.article-image {
    width: 100%;
    height: auto;
    border-radius: 0.5rem;
    border: 1px solid var(--color-border);
}
.article-figure figcaption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text);
    margin-top: 0.75rem;
}

/* /// BUTTONS /// */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.75rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}
.button:hover { transform: translateY(-2px); }
.button-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}
.button-primary:hover { background-color: var(--color-primary-dark); text-decoration: none; }
.button-secondary {
    width: 100%;
    background-color: var(--color-border);
    color: var(--color-text-strong);
}
.button-secondary:hover { background-color: #4b5563; text-decoration: none; }
.share-button-wrapper { text-align: center; margin-top: 3rem; }
.button .icon { width: 1.25rem; height: 1.25rem; margin-right: 0.5rem; }

/* /// MODAL STYLES /// */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 40;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out;
}
.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    padding: 1.5rem;
    width: 90%;
    max-width: 448px;
    z-index: 50;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
}
.modal-overlay.is-active, .modal.is-active {
    opacity: 1;
    visibility: visible;
}
.modal.is-active { transform: translate(-50%, -50%) scale(1); }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; color: var(--color-text-strong); }
.modal-close-button { background: none; border: none; font-size: 1.75rem; cursor: pointer; color: var(--color-text); }
.modal-close-button:hover { color: var(--color-text-strong); }
.modal-body { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.social-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
    color: #fff;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: opacity 0.3s;
}
.social-button:hover { opacity: 0.85; text-decoration: none; }
.facebook { background-color: #1877f2; }
.twitter { background-color: #1da1f2; }
.linkedin { background-color: #0a66c2; }
.whatsapp { background-color: #25d366; }
.modal-footer { margin-top: 1.5rem; }

/* /// MESSAGE BOX /// */
.message-box {
    position: fixed;
    bottom: 1.25rem;
    right: 1.25rem;
    background-color: var(--color-surface);
    color: var(--color-text-strong);
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    z-index: 50;
    opacity: 0;
    transform: translateY(0.5rem);
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
}
.message-box.is-active {
    opacity: 1;
    transform: translateY(0);
}
.message-box.is-error { background-color: #991b1b; color: #fecaca; }

/* /// RESPONSIVE STYLES /// */
@media (min-width: 768px) {
    .desktop-nav { display: flex; align-items: center; }
    .mobile-menu-button { display: none; }
    .mobile-menu { display: none; }
    h1 { font-size: 3.25rem; }
}