:root {
    --primary-color: #6B46C1;
    --secondary-color: #805AD5;
    --bg-color: #FFFFFF;
    --text-color: #1A202C;
    --code-bg: #F7FAFC;
    --border-color: #E2E8F0;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1A202C;
        --text-color: #F7FAFC;
        --code-bg: #2D3748;
        --border-color: #4A5568;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 60px 0;
    text-align: center;
}

header .logo {
    width: 120px;
    height: auto;
    margin-bottom: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header .tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 20px;
}

header .badges img {
    margin: 0 5px;
}

nav {
    background-color: var(--code-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav .container {
    display: flex;
    gap: 20px;
    padding: 15px 20px;
    overflow-x: auto;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    white-space: nowrap;
}

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

main {
    padding: 40px 0;
}

section {
    margin-bottom: 60px;
}

h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

h3 {
    color: var(--secondary-color);
    margin: 30px 0 15px;
}

pre {
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    margin: 15px 0;
}

code {
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 0.9rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--code-bg);
    font-weight: 600;
}

ul {
    margin: 15px 0;
    padding-left: 25px;
}

li {
    margin: 8px 0;
}

footer {
    background-color: var(--code-bg);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    text-align: center;
}

footer a {
    color: var(--primary-color);
}

/* simple_eif_phone additions */
nav .container { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: center; }
table { border-collapse: collapse; width: 100%; margin: 12px 0 20px; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--border-color); padding: 6px 10px; text-align: left; vertical-align: top; }
pre { overflow-x: auto; max-width: 100%; }
.feature { border-top: 1px solid var(--border-color); padding: 12px 0; }
.feature h4 { font-family: Consolas, Menlo, monospace; font-size: 0.98rem; font-weight: 600; word-break: break-word; }
.feature p { margin: 4px 0; }
.clause { font-family: Consolas, Menlo, monospace; font-size: 0.86rem; white-space: pre-wrap; word-break: break-word; }
.note { border-left: 4px solid var(--secondary-color); padding: 8px 14px; margin: 14px 0; background: var(--code-bg); }
h3 { margin-top: 20px; }
main ul, main ol { margin: 8px 0 14px 24px; }
main p { margin: 8px 0; }
main a { color: var(--primary-color); }
@media (prefers-color-scheme: dark) {
    main a { color: #90CDF4; }
    main h2, main h3, section h2 { color: #C4B5FD; border-color: #805AD5; }
}