:root {
    --color-bg: #ffffff;
    --color-text: #1a202c;
    --color-text-muted: #4a5568;
    --color-primary: #1a202c;
    --color-accent: #3182ce;
    --color-border: #e2e8f0;
    --color-surface: #f7fafc;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius: 4px;
    --spacing-unit: 1rem;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    margin: 0;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
header {
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    z-index: 100;
}

.nav-brand {
    font-weight: 800;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Sections */
section {
    padding: 4rem 0;
    border-bottom: 1px solid var(--color-border);
}

section:last-of-type {
    border-bottom: none;
}

.section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 2rem;
    display: block;
}

/* Cards & Components */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.news-card {
    border: 1px solid var(--color-border);
    padding: 1.5rem;
    border-radius: var(--radius);
    transition: border-color 0.2s;
}

.news-card:hover {
    border-color: var(--color-accent);
}

.news-date {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.news-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

/* Editorial / Our View */
.editorial {
    max-width: 700px;
}

.editorial-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.editorial-content {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--color-text);
}

/* Activities */
.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.activity-icon {
    width: 48px;
    height: 48px;
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    flex-shrink: 0;
    border: 1px solid var(--color-border);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

input[type="email"], input[type="text"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-family);
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
    transition: background 0.2s;
}

.btn:hover {
    background: #000;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
}

footer {
    padding: 4rem 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    .card-grid { grid-template-columns: 1fr; }
}

/* Toast/Notification */
#notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius);
    display: none;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}