/* saltco.co — Open-Source Computing & Capacity Building
   Self-contained, system fonts, no external dependencies. */

:root {
    --primary: #1a365d;
    --secondary: #2b6cb0;
    --accent: #319795;
    --dark: #2d3748;
    --light: #f7fafc;
    --white: #ffffff;
    --gray: #718096;
    --border: #e2e8f0;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.7;
}

a {
    color: var(--secondary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ---------- Navigation ---------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--primary);
    color: var(--white);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.navbar .brand {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.05em;
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.navbar .brand-name {
    display: flex;
    align-items: baseline;
}

.navbar .brand-name span {
    color: var(--accent);
}

.navbar .brand-tagline {
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--white);
    opacity: 0.85;
}

.navbar .brand .brand-tagline {
    color: var(--white);
}

.nav-links {
    display: flex;
    gap: 1.25rem;
    align-items: center;
}

.nav-links a {
    color: var(--white);
    font-size: 0.92rem;
    opacity: 0.9;
}

.nav-links a:hover {
    opacity: 1;
    text-decoration: none;
    color: #9ae6b4;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--primary);
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }
}

/* ---------- Hero ---------- */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    padding: 4.5rem 1.5rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.6rem;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.hero p {
    font-size: 1.15rem;
    max-width: 720px;
    margin: 0 auto 2rem;
    opacity: 0.92;
}

.hero .tagline {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.04em;
    margin-bottom: 0.5rem;
    opacity: 1;
}

.hero .cta {
    display: inline-block;
    background-color: var(--accent);
    color: var(--white);
    padding: 0.75rem 2rem;
    border-radius: 6px;
    font-weight: 600;
}

.hero .cta:hover {
    background-color: #2c7a7b;
    text-decoration: none;
}

/* ---------- Layout ---------- */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

.section-title {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0.5rem;
}

/* ---------- Cards ---------- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.card {
    background-color: var(--white);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.card h3 {
    color: var(--secondary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.card p {
    font-size: 0.95rem;
    color: var(--gray);
}

/* ---------- Track list ---------- */
.track {
    background-color: var(--white);
    border-left: 4px solid var(--accent);
    border-radius: 6px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.track h3 {
    color: var(--primary);
    margin-bottom: 0.4rem;
}

.track p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* ---------- Article list ---------- */
.article {
    background-color: var(--white);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
}

.article .date {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.article h3 {
    margin: 0.25rem 0 0.4rem;
    color: var(--primary);
}

.article p {
    font-size: 0.92rem;
    color: var(--gray);
}

.article h1 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.article h2 {
    font-size: 1.35rem;
    color: var(--secondary);
    margin: 1.5rem 0 0.5rem;
}

.article p em {
    color: var(--dark);
}

/* ---------- Newsletter ---------- */
.newsletter {
    background-color: var(--primary);
    color: var(--white);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    margin-top: 2.5rem;
}

.newsletter h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.newsletter p {
    opacity: 0.9;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.newsletter input[type="email"] {
    padding: 0.7rem 1rem;
    border: none;
    border-radius: 6px;
    width: 60%;
    max-width: 380px;
    margin-right: 0.5rem;
    font-size: 0.95rem;
}

.newsletter button {
    padding: 0.7rem 1.5rem;
    background-color: var(--accent);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.95rem;
}

.newsletter button:hover {
    background-color: #2c7a7b;
}

@media (max-width: 768px) {
    .newsletter input[type="email"] {
        width: 100%;
        margin: 0 0 0.75rem 0;
    }
}

/* ---------- Footer ---------- */
.footer {
    background-color: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 1.75rem 1.5rem;
    font-size: 0.85rem;
}

.footer a {
    color: #9ae6b4;
}

.footer .social {
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}