/* ==========================================================
   DESIGN TOKENS & BASE STYLES
   ========================================================== */

:root {
    --color-paper: #F4F1E9;
    --color-paper-alt: #ECE8DC;
    --color-white: #FFFDF9;
    --color-ink: #20241F;
    --color-ink-soft: #4B5049;
    --color-green: #263B29;
    --color-green-dark: #16211A;
    --color-letterhead: #59000A;
    --color-letterhead-dark: #3A0007;
    --color-brass: #A9812E;
    --color-brass-light: #C9A54C;
    --color-rule: #CFC9B8;

    --font-serif: 'Literata', Georgia, serif;
    --font-sans: 'IBM Plex Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    height: 100%;
}

body {
    margin: 0;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    font-family: var(--font-body);
    color: var(--color-ink);
    background: var(--color-paper);
    line-height: 1.6;
}

main {
    flex: 1 0 auto;
    padding: 64px 0 40px;
}

footer {
    flex-shrink: 0;
    background: var(--color-letterhead-dark);
    color: #A9A895;
    padding: 30px 0;
    margin-top: 40px;
}

a {
    color: inherit;
}

.wrap {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ---------------------------------------------------------
   LETTERHEAD / HEADER
   --------------------------------------------------------- */

.letterhead {
    background: var(--color-letterhead);
    color: var(--color-paper);
}

.letterhead-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 32px 22px;
    max-width: 1040px;
    margin: 0 auto;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.seal {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 1.5px solid var(--color-brass-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 17px;
    letter-spacing: 0.5px;
    color: var(--color-brass-light);
}

.brand-text .name {
    font-family: var(--font-display);
    font-size: 24px;
    letter-spacing: 0.5px;
    line-height: 1.1;
}

.brand-text .tagline {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-brass-light);
    margin-top: 4px;
}

.header-contact {
    font-family: var(--font-mono);
    font-size: 14px;
    text-align: right;
    color: #D8D6C7;
    line-height: 1.7;
}

.header-contact a {
    color: inherit;
}

/* LANGUAGE CHANGER */

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-btn {
    background: none;
    border: none;
    padding: 2px;
    cursor: pointer;
    display: flex;
    align-items: center;
    opacity: 0.5;
    transition: opacity 0.2s ease, transform 0.2s ease;
    border-radius: 2px;
}

.lang-btn * {
    pointer-events: none;
}

.lang-btn:hover {
    opacity: 0.85;
}

.lang-btn.active {
    opacity: 1;
    outline: 1.5px solid var(--color-brass-light);
    outline-offset: 2px;
}

.flag-icon {
    width: 22px;
    height: 15px;
    object-fit: cover;
    border-radius: 2px;
    display: block;
}

.lang-divider {
    color: rgba(216, 214, 199, 0.3);
    font-family: var(--font-mono);
    font-size: 12px;
}

/* ---- NAV / INDEX TABS ---- */

nav.site-nav {
    border-top: 1px solid rgba(201, 165, 76, 0.35);
    background: var(--color-letterhead-dark);
}

nav.site-nav ul {
    list-style: none;
    display: flex;
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 32px;
}

nav.site-nav a {
    display: block;
    padding: 14px 22px;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 12.5px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #C7C4B4;
    border-bottom: 2px solid transparent;
}

nav.site-nav a:hover {
    color: var(--color-paper);
}

nav.site-nav a.active {
    color: var(--color-brass-light);
    border-bottom: 2px solid var(--color-brass-light);
}

/* ---------------------------------------------------------
   ARTICLE STRUCTURE & BUTTONS (Shared across pages)
   --------------------------------------------------------- */

.article {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 8px 28px;
    margin-bottom: 64px;
}

.article-number {
    font-family: var(--font-mono);
    font-size: 12.5px;
    letter-spacing: 1px;
    color: var(--color-brass);
    padding-top: 6px;
    border-top: 1px solid var(--color-brass);
}

.article-number-v2 {
    font-family: var(--font-mono);
    font-size: 12.5px;
    letter-spacing: 1px;
    color: var(--color-brass);
    padding-top: 22px;
}

.article-content {
    border-top: 1px solid var(--color-rule);
    padding-top: 6px;
}

.article h1,
.article h2 {
    font-family: var(--font-display);
    font-weight: 500;
    color: var(--color-green);
    margin: 0 0 14px;
}

.article h1 {
    font-size: 34px;
}

.article h2 {
    font-size: 24px;
}

.article p {
    color: var(--color-ink-soft);
    margin: 0 0 14px;
    max-width: 640px;
}

.article ul {
    color: var(--color-ink-soft);
    padding-left: 20px;
    max-width: 640px;
}

.btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12.5px;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-decoration: none;
    padding: 13px 26px;
    background: var(--color-green);
    color: var(--color-paper);
    border: 1px solid var(--color-green);
}

.btn:hover {
    background: var(--color-green-dark);
}

.btn-outline {
    background: transparent;
    color: var(--color-green);
    border: 1px solid var(--color-green);
}

/* ---------------------------------------------------------
   FOOTER
   --------------------------------------------------------- */

footer .wrap {
    display: flex;
    padding-left: 0;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

footer a {
    color: #C9A54C;
    text-decoration: none;
}

/* ---------------------------------------------------------
   RESPONSIVE BASE MEDIA QUERIES
   --------------------------------------------------------- */

@media (max-width: 768px) {
    .letterhead-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 20px 16px;
    }

    .header-contact {
        text-align: left;
    }

    nav.site-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        padding: 8px 16px;
        gap: 4px 0;
    }

    nav.site-nav a {
        padding: 10px 14px;
        font-size: 12px;
        border-bottom: 2px solid transparent;
    }

    footer .wrap {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 12px;
        padding-top: 24px;
        padding-bottom: 24px;
    }

    footer .sep {
        display: none;
    }

    footer div {
        display: flex;
        flex-direction: column;
        gap: 6px;
    }
}

@media (max-width: 640px) {
    .article {
        grid-template-columns: 1fr;
    }

    .article-number {
        border-top: none;
        padding-top: 0;
    }
}

@media (max-width: 480px) {
    footer .wrap {
        padding: 0 16px;
    }
}