/* ==========================================================================
   M2 Cybersec – base.css
   Zentrales Stylesheet: Design-Tokens, Fonts, Navbar, Footer, Buttons.
   Seitenspezifisches CSS bleibt inline in der jeweiligen Seite.
   ========================================================================== */

/* --- Fonts (Brand: Nekst für Display, Helvetica Now für Fließtext) ------- */
/* Lizenzhinweis: kommerzielle Fonts – Fallback-Stack muss immer sauber
   funktionieren, damit die Fonts notfalls entfernbar sind. */

@font-face {
    font-family: 'Nekst';
    src: url('/assets/fonts/nekst-medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Nekst';
    src: url('/assets/fonts/nekst-semibold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Nekst';
    src: url('/assets/fonts/nekst-bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Helvetica Now';
    src: url('/assets/fonts/helvetica-now-var.woff2') format('woff2-variations');
    font-weight: 300 700;
    font-style: normal;
    font-display: swap;
}

/* --- Design-Tokens -------------------------------------------------------- */

:root {
    /* Markenfarben */
    --primary-dark: #191819;
    --primary-cyan: #00fcf6;
    --primary-white: #ffffff;
    --secondary-gray: #515151;          /* nur für Flächen/Borders – nicht für Text auf dunklem Grund */
    --secondary-light-cyan: #5cfff3;
    --secondary-light-gray: #CECECE;

    /* Korrigierte Grautöne (WCAG-konform auf #191819) */
    --text-muted: #9a9a9a;              /* Metatexte, Labels – ersetzt #515151 als Textfarbe */

    /* Typografie */
    --font-display: 'Nekst', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-body: 'Helvetica Now', 'Helvetica Neue', Helvetica, Arial, sans-serif;

    /* Radius-Skala (Pille nur für Buttons/Badges) */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-pill: 50px;

    /* Schatten-Skala */
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);
    --shadow-cyan: 0 8px 28px rgba(0, 252, 246, 0.25);

    /* Bewegung */
    --transition-fast: 150ms ease;
    --transition-base: 220ms ease;

    /* Abstände (Sektionen) */
    --section-pad: 6rem 5%;
}

/* --- Reset & Grundlagen --------------------------------------------------- */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--primary-dark);
    color: var(--primary-white);
    line-height: 1.6;
}

/* --- Typografie-Hierarchie -------------------------------------------------
   Nekst für Display/Überschriften, Helvetica Now für Fließtext.
   Cyan-Diät: Überschriften sind weiß; Cyan bleibt Interaktion + 1 Akzent
   pro Sektion (z. B. das Eyebrow-Label). */

h1, h2, h3 {
    font-family: var(--font-display);
    color: var(--primary-white);
    line-height: 1.15;
}

h1 { font-weight: 700; letter-spacing: -0.01em; }
h2 { font-weight: 700; letter-spacing: -0.005em; }
h3 { font-weight: 600; }

/* Eyebrow-Label über Sektionstiteln */
.eyebrow {
    display: block;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--primary-cyan);
    margin-bottom: 0.9rem;
}

.eyebrow-center {
    text-align: center;
}

/* --- Icons ------------------------------------------------------------------
   Inline-SVG-Set (Stroke-Stil, 24×24, stroke="currentColor", 1.5px).
   Größe kommt vom font-size des Containers, Farbe vom color des Containers
   (Icon-Container der Seiten setzen i. d. R. var(--primary-cyan)). */

.icon {
    width: 1em;
    height: 1em;
    display: inline-block;
    vertical-align: -0.125em;
    flex-shrink: 0;
}

/* Icon als Präfix vor Überschriften/Textzeilen – der eine Cyan-Akzent */
.icon-lead {
    color: var(--primary-cyan);
    width: 0.9em;
    height: 0.9em;
    margin-right: 0.35rem;
    vertical-align: -0.08em;
}

/* --- Accessibility -------------------------------------------------------- */

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-cyan);
    color: var(--primary-dark);
    padding: 8px;
    text-decoration: none;
    z-index: 1100;
}

.skip-link:focus {
    top: 0;
}

:focus-visible {
    outline: 2px solid var(--primary-cyan);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* --- Navbar ---------------------------------------------------------------- */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(25, 24, 25, 0.98);
    backdrop-filter: blur(10px);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    border-bottom: 2px solid var(--primary-cyan);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-cyan);
    letter-spacing: 1px;
    text-decoration: none;
}

.logo-image {
    height: 45px;
    width: auto;
    transition: transform var(--transition-base);
}

.logo:hover .logo-image {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--primary-white);
    text-decoration: none;
    transition: color var(--transition-base);
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-cyan);
    transition: width var(--transition-base);
}

.nav-links a:hover::after {
    width: 100%;
}

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

/* Hamburger-Toggle (nur mobil sichtbar, JS in /assets/js/nav.js) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--primary-white);
    border-radius: 1px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Buttons ---------------------------------------------------------------
   Ein System: .btn + .btn-primary / .btn-secondary / .btn-ghost
   (Seiten können Modifier ergänzen, z. B. .btn-nrw auf der Homepage) */

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition-base), box-shadow var(--transition-base),
        background var(--transition-base), color var(--transition-base);
    border: 2px solid var(--primary-cyan);
}

.btn-primary {
    background: var(--primary-cyan);
    color: var(--primary-dark);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-cyan);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-cyan);
}

.btn-secondary:hover {
    background: var(--primary-cyan);
    color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-cyan);
}

.btn-ghost {
    background: transparent;
    color: var(--secondary-light-gray);
    border-color: rgba(255, 255, 255, 0.25);
}

.btn-ghost:hover {
    color: var(--primary-white);
    border-color: var(--primary-white);
}

/* --- Footer ----------------------------------------------------------------
   Standard: schlanker, zentrierter Footer mit Impressum/Datenschutz.
   Homepage nutzt zusätzlich .footer-content (Spalten-Grid). */

footer {
    background: var(--primary-dark);
    padding: 3rem 5%;
    border-top: 2px solid var(--primary-cyan);
    text-align: center;
    color: var(--secondary-light-gray);
    font-size: 0.95rem;
}

footer a {
    color: var(--secondary-light-gray);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-legal {
    margin-top: 0.7rem;
    font-size: 0.9rem;
}

.footer-legal a {
    margin: 0 0.5rem;
}

/* Homepage-Footer (Spalten) */
.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    text-align: left;
}

.footer-section h4 {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--primary-white);
    margin-bottom: 1.5rem;
    font-size: 1.15rem;
}

.footer-section p,
.footer-section a {
    color: var(--secondary-light-gray);
    text-decoration: none;
    display: block;
    margin-bottom: 0.8rem;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--secondary-gray);
    text-align: center;
    color: var(--secondary-light-gray);
}

/* --- Responsive ------------------------------------------------------------ */

@media (max-width: 768px) {
    .navbar {
        padding: 0.8rem 5%;
    }

    .nav-toggle {
        display: inline-flex;
    }

    /* Nav-Links als ausklappbares Panel unter der Navbar */
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(25, 24, 25, 0.98);
        backdrop-filter: blur(10px);
        border-bottom: 2px solid var(--primary-cyan);
        padding: 0.4rem 5% 1rem;
        box-shadow: var(--shadow-md);
    }

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

    .nav-links a {
        display: block;
        padding: 0.9rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }

    .nav-links a::after {
        display: none;
    }
}

@media (max-width: 420px) {
    .btn {
        padding: 0.9rem 1.8rem;
        font-size: 0.95rem;
    }
}