/* ========================================
   global.css — Swiss Design System
   Bruns & Bruns e.K.
   ======================================== */

/* --- Design Tokens --- */
:root {
    --black: #000000;
    --white: #ffffff;
    --brand-orange: #C87137;
    --gray-light: #f5f5f5;
    --gray-medium: #cccccc;
    --gray-dark: #666666;

    /* Backward-compatible aliases (legacy Variante A) */
    --ink-black: var(--black);
    --ink-grey: var(--gray-dark);
    --bg-paper: var(--white);
    --bg-section: var(--gray-light);
    --line-color: var(--gray-medium);
    --font-headline: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-label: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* --- Base --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: var(--white);
    color: var(--black);
    line-height: 1.5;
    font-size: 16px;
    margin: 0;
    padding: 0;
}

/* --- Grid --- */
.swiss-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-weight: 400;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 5rem);
    margin-bottom: 1.5rem;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.75rem);
    margin-bottom: 1.5rem;
    border-left: 5px solid var(--brand-orange);
    padding-left: 1rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

h4 {
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--brand-orange);
}

p {
    font-size: 1.125rem;
    line-height: 1.75;
    margin-bottom: 1.5rem;
    max-width: 70ch;
}

/* --- Layout Utilities --- */
.col-meta {
    grid-column: 1 / 3;
}

.col-content {
    grid-column: 4 / 12;
}

.bg-grey {
    background-color: var(--gray-light);
}

/* --- Section Labels --- */
.section-number {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--brand-orange);
    font-weight: 700;
    margin-bottom: 1rem;
}

.index-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-weight: 600;
    color: var(--black);
    display: block;
    border-top: 1px solid var(--black);
    padding-top: 0.5rem;
    margin-bottom: 1rem;
}

.label-look {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-weight: 600;
    color: var(--black);
    text-decoration: none;
}

/* --- Hero --- */
.accent-bar {
    width: 80px;
    height: 6px;
    background-color: var(--brand-orange);
    margin-bottom: 2rem;
}

.hero-lead {
    font-size: 1.8rem;
    line-height: 1.4;
    color: var(--black);
    border-left: 1px solid var(--black);
    padding-left: 2rem;
    margin-bottom: 2rem;
}

/* --- Sections --- */
section {
    padding: 5rem 0;
}

/* --- Inline Links --- */
a.inline-link {
    color: var(--black);
    text-decoration: none;
    border-bottom: 2px solid var(--brand-orange);
    transition: color 0.2s, border-bottom-color 0.2s;
}

a.inline-link:hover {
    color: var(--brand-orange);
}

/* --- Definition Block --- */
.definition-block {
    background-color: var(--gray-light);
    border-left: 1px solid var(--black);
    padding: 2.5rem;
    margin-bottom: 2rem;
}

/* --- Header --- */
header {
    border-bottom: 2px solid var(--black);
    background-color: var(--white);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav#desktopNav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-weight: 500;
    color: var(--black);
    text-decoration: none;
    transition: color 0.2s;
    padding: 0.5rem 0;
    white-space: nowrap;
}

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

nav a.active {
    color: var(--brand-orange);
    font-weight: 700;
}

/* --- Footer --- */
footer {
    border-top: 2px solid var(--black);
    background-color: var(--gray-light);
    margin-top: 6rem;
}

footer a {
    color: var(--black);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.9rem;
}

footer a:hover {
    color: var(--brand-orange);
}

/* --- Mobile Menu --- */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: 2px solid var(--black);
    cursor: pointer;
    padding: 0.5rem;
    width: 44px;
    height: 44px;
    position: relative;
    z-index: 101;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--black);
    margin: 5px auto;
    transition: transform 0.3s, opacity 0.3s;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.mobile-nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100dvh;
    background-color: var(--white);
    z-index: 100;
    padding: 6rem 2rem 2rem;
    overflow-y: auto;
}

.mobile-nav-overlay.active {
    display: block;
}

.mobile-nav-overlay nav {
    display: flex !important;
    flex-direction: column;
    gap: 0 !important;
}

.mobile-nav-overlay nav a {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--gray-medium);
    font-size: 1rem;
}

/* --- Responsive (768px) --- */
@media (max-width: 768px) {
    .swiss-grid {
        gap: 1.5rem;
        padding: 0 1.5rem;
    }

    main .swiss-grid {
        display: block;
    }

    footer .swiss-grid {
        display: block;
    }

    .col-meta {
        margin-bottom: 1rem;
        color: var(--brand-orange);
    }

    header .swiss-grid {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 1.5rem;
    }

    header nav {
        display: none !important;
    }

    .mobile-menu-toggle {
        display: block;
    }

    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero-lead {
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--black);
        padding-top: 1rem;
    }
}

/* --- Focus Styles (Accessibility) --- */
:focus-visible {
    outline: 3px solid var(--brand-orange);
    outline-offset: 3px;
}

/* --- Persistenter CTA --- */
.sticky-cta {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 900;
    background: var(--ink-black);
    color: var(--white);
    text-decoration: none;
    font-family: var(--font-label);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: 0.85rem 1.5rem;
    border: 1px solid var(--ink-black);
    display: inline-block;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s ease, transform 0.4s ease, background-color 0.2s, color 0.2s;
    pointer-events: none;
}
.sticky-cta.visible {
    opacity: 1;
    transform: none;
    pointer-events: auto;
}
.sticky-cta:hover {
    background: var(--brand-orange);
    border-color: var(--brand-orange);
    color: var(--white);
}
@media (max-width: 640px) {
    .sticky-cta {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        text-align: center;
    }
}