/* CLAUDE: Navigation Styles - Desktop und Mobile */
/* CLAUDE: Verwendet BEM-Namenskonvention (Block__Element--Modifier) */
/* CLAUDE: Anpassen: Farben über CSS Variables in base.css */

/* ==========================================================================
   CLAUDE: Site Header
   ========================================================================== */

.pvm-site-header {
    position: fixed;                           /* CLAUDE: Header bleibt beim Scrollen oben */
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;                             /* CLAUDE: Über allen anderen Elementen */
    background: var(--pvm-color-white);        /* CLAUDE: Weißer Hintergrund */
    box-shadow: var(--pvm-shadow-sm);          /* CLAUDE: Subtiler Schatten */
    transition: background var(--pvm-transition-base), box-shadow var(--pvm-transition-base);
}

.pvm-header-inner {
    display: flex;                             /* CLAUDE: Flexbox für horizontale Anordnung */
    align-items: center;                       /* CLAUDE: Vertikal zentriert */
    justify-content: space-between;            /* CLAUDE: Logo links, Nav rechts */
    max-width: var(--pvm-header-container-max, 1800px); /* CLAUDE: Breiterer Container - Logo näher am Rand */
    margin: 0 auto;                            /* CLAUDE: Zentriert */
    padding: 0 clamp(1.5rem, 3vw, 3rem);       /* CLAUDE: Konstantes Padding für Edge-Abstand */
    height: var(--pvm-header-height);          /* CLAUDE: Header-Höhe */
}

/* ==========================================================================
   CLAUDE: Logo
   ========================================================================== */

.pvm-site-logo {
    display: flex;                             /* CLAUDE: Flexbox für Zentrierung */
    align-items: center;
}

.pvm-site-logo img {
    height: 30px;                              /* CLAUDE: Logo-Höhe - minimal & dezent (30px) */
    width: auto;                               /* CLAUDE: Proportionen beibehalten */
}

/* ==========================================================================
   CLAUDE: Desktop Navigation
   ========================================================================== */

.pvm-nav-desktop {
    display: flex;                             /* CLAUDE: Flexbox */
    align-items: center;                       /* CLAUDE: Vertikal zentriert */
    gap: var(--pvm-spacing-lg);                /* CLAUDE: Abstand zwischen Menü und CTA */
}

.pvm-nav-menu {
    display: flex;                             /* CLAUDE: Horizontal */
    align-items: center;
    gap: 0.5rem;                               /* CLAUDE: Mehr Abstand zwischen Items für bessere Lesbarkeit */
    list-style: none;                          /* CLAUDE: Keine Bullets */
    margin: 0;
    padding: 0;
}

.pvm-nav-item > a {
    display: flex;                             /* CLAUDE: Flexbox für Icon-Ausrichtung */
    align-items: center;
    gap: 0.5rem;                               /* CLAUDE: Abstand zum Pfeil */
    padding: 1rem 1.25rem;                     /* CLAUDE: Größere Klickfläche für bessere UX */
    color: var(--pvm-color-dark);              /* CLAUDE: Dunkle Textfarbe */
    text-decoration: none;
    font-weight: 500;                          /* CLAUDE: Medium Weight */
    font-size: 1rem;                           /* CLAUDE: Größere Schrift für bessere Lesbarkeit */
    white-space: nowrap;                       /* CLAUDE: Verhindert Zeilenumbruch | Fix für "KI Entwicklung" */
    transition: color var(--pvm-transition-fast);
}

.pvm-nav-item > a:hover {
    color: var(--pvm-color-primary);           /* CLAUDE: Hover-Farbe (Blau) */
}

/* CLAUDE: Dropdown Pfeil Animation */
.pvm-dropdown-arrow {
    transition: transform 0.2s ease;           /* CLAUDE: Smooth Rotation */
}

.pvm-nav-item:hover .pvm-dropdown-arrow {
    transform: rotate(180deg);                 /* CLAUDE: Pfeil dreht bei Hover */
}

/* ==========================================================================
   CLAUDE: Dropdown Menu
   ========================================================================== */

.pvm-dropdown-menu {
    position: absolute;                        /* CLAUDE: Positioniert relativ zum Parent */
    top: 100%;                                 /* CLAUDE: Direkt unter dem Link */
    left: 0;
    min-width: 260px;                          /* CLAUDE: Mindestbreite */
    background: var(--pvm-color-white);        /* CLAUDE: Weißer Hintergrund */
    border-radius: var(--pvm-radius-lg);       /* CLAUDE: Abgerundete Ecken */
    box-shadow: var(--pvm-shadow-md);          /* CLAUDE: Schatten */
    padding: 0.75rem 0;
    opacity: 0;                                /* CLAUDE: Initial versteckt */
    visibility: hidden;
    transform: translateY(10px);               /* CLAUDE: Leicht versetzt */
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
    list-style: none;
    margin: 0;
}

.pvm-nav-item--has-dropdown {
    position: relative;                        /* CLAUDE: Ankerpunkt für Dropdown */
}

.pvm-nav-item--has-dropdown:hover .pvm-dropdown-menu {
    opacity: 1;                                /* CLAUDE: Sichtbar bei Hover */
    visibility: visible;
    transform: translateY(0);                  /* CLAUDE: In Position */
}

.pvm-dropdown-menu li a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: #555;                               /* CLAUDE: Leicht heller als Haupttext */
    text-decoration: none;
    font-size: 0.9rem;
    transition: background var(--pvm-transition-fast), color var(--pvm-transition-fast);
}

.pvm-dropdown-menu li a:hover {
    background: var(--pvm-color-light);        /* CLAUDE: Hover-Hintergrund */
    color: var(--pvm-color-primary);           /* CLAUDE: Hover-Farbe */
}

/* CLAUDE: Gruppiertes Dropdown (2 Spalten für Marketing) */
.pvm-dropdown-menu--grouped {
    min-width: 480px;                          /* CLAUDE: Breiter für 2 Spalten */
    display: grid;
    grid-template-columns: 1fr 1fr;            /* CLAUDE: Zwei gleiche Spalten */
    padding: 1.5rem;
    gap: 1.5rem;
}

.pvm-dropdown-group {
    list-style: none;
}

.pvm-dropdown-group ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.pvm-dropdown-group__label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;                 /* CLAUDE: Großbuchstaben */
    letter-spacing: 1px;                       /* CLAUDE: Erhöhter Buchstabenabstand */
    color: #999;                               /* CLAUDE: Grau */
    margin-bottom: 0.75rem;
}

.pvm-dropdown-group ul li a {
    padding: 0.5rem 0;                         /* CLAUDE: Weniger Padding in Gruppen */
    border-radius: var(--pvm-radius-sm);
}

/* ==========================================================================
   CLAUDE: CTA Button in Navigation
   ========================================================================== */

.pvm-nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 0.625rem 1.5rem;                  /* CLAUDE: Kompakteres Padding - harmonischer mit Header */
    background: var(--pvm-gradient);           /* CLAUDE: Gradient für mehr Aufmerksamkeit */
    color: var(--pvm-color-white);             /* CLAUDE: Weiße Schrift */
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;                         /* CLAUDE: Etwas kleinere Schrift für Balance */
    border-radius: var(--pvm-radius-full);     /* CLAUDE: Pill-Shape für modernen Look */
    box-shadow: var(--pvm-shadow-primary);     /* CLAUDE: Subtiler Glow-Effekt */
    transition: all var(--pvm-transition-fast);
}

.pvm-nav-cta:hover {
    background: var(--pvm-gradient-reverse);   /* CLAUDE: Umgekehrter Gradient bei Hover */
    color: var(--pvm-color-white);
    transform: translateY(-2px);               /* CLAUDE: Stärkerer Lift-Effekt */
    box-shadow: var(--pvm-shadow-lg);          /* CLAUDE: Größerer Schatten bei Hover */
}

/* ==========================================================================
   CLAUDE: Mobile Toggle (Hamburger)
   ========================================================================== */

.pvm-mobile-toggle {
    display: none;                             /* CLAUDE: Standard: versteckt */
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
}

.pvm-hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 24px;
}

.pvm-hamburger span {
    display: block;
    height: 2px;
    background: var(--pvm-color-dark);
    border-radius: 2px;
    transition: transform var(--pvm-transition-base), opacity var(--pvm-transition-base);
}

/* ==========================================================================
   CLAUDE: Mobile Navigation
   ========================================================================== */

.pvm-nav-overlay {
    position: fixed;
    inset: 0;                                  /* CLAUDE: Füllt gesamten Viewport */
    background: rgba(0,0,0,0.5);               /* CLAUDE: Halbtransparentes Schwarz */
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--pvm-transition-base), visibility var(--pvm-transition-base);
    z-index: 1001;
}

.pvm-nav-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

.pvm-nav-mobile {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 400px;                          /* CLAUDE: Maximale Breite */
    height: 100vh;
    height: 100dvh;                            /* CLAUDE: Dynamic Viewport Height für Mobile */
    background: var(--pvm-color-white);
    z-index: 1002;
    transform: translateX(100%);               /* CLAUDE: Initial außerhalb rechts */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.pvm-nav-mobile.is-active {
    transform: translateX(0);                  /* CLAUDE: Einsliden */
}

/* CLAUDE: Mobile Header */
.pvm-nav-mobile__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--pvm-color-border);
}

.pvm-nav-close {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--pvm-color-dark);
}

/* CLAUDE: Mobile Menu Items */
.pvm-nav-mobile__menu {
    flex: 1;
    list-style: none;
    margin: 0;
    padding: 1rem 0;
    overflow-y: auto;                          /* CLAUDE: Scrollbar bei langem Menü */
}

.pvm-nav-mobile__item {
    border-bottom: 1px solid #f0f0f0;
}

.pvm-nav-mobile__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pvm-nav-mobile__item > a,
.pvm-nav-mobile__row > a {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--pvm-color-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
}

/* CLAUDE: Accordion Toggle */
.pvm-accordion-toggle {
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    cursor: pointer;
    color: #666;
}

.pvm-icon-vertical {
    transition: opacity var(--pvm-transition-base);
}

.pvm-accordion-toggle[aria-expanded="true"] .pvm-icon-vertical {
    opacity: 0;                                /* CLAUDE: + wird zu - */
}

/* CLAUDE: Submenu (Accordion Content) */
.pvm-nav-mobile__submenu {
    max-height: 0;                             /* CLAUDE: Initial geschlossen */
    overflow: hidden;
    transition: max-height var(--pvm-transition-base);
    list-style: none;
    margin: 0;
    padding: 0;
    background: var(--pvm-color-light);
}

.pvm-nav-mobile__item.is-open .pvm-nav-mobile__submenu {
    max-height: 500px;                         /* CLAUDE: Geöffnet - genug Platz für Items */
}

.pvm-nav-mobile__submenu li a {
    display: block;
    padding: 0.75rem 1.5rem 0.75rem 2.5rem;    /* CLAUDE: Eingerückt */
    color: #666;
    text-decoration: none;
    font-size: 0.95rem;
    border-left: 3px solid transparent;
    transition: border-color var(--pvm-transition-fast), color var(--pvm-transition-fast);
}

.pvm-nav-mobile__submenu li a:hover {
    border-left-color: var(--pvm-color-primary);
    color: var(--pvm-color-primary);
}

/* CLAUDE: Mobile Footer */
.pvm-nav-mobile__footer {
    padding: 1.5rem;
    border-top: 1px solid var(--pvm-color-border);
}

/* ==========================================================================
   CLAUDE: Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
    .pvm-nav-desktop {
        display: none;                         /* CLAUDE: Desktop Nav verstecken */
    }

    .pvm-mobile-toggle {
        display: block;                        /* CLAUDE: Hamburger zeigen */
    }
}

/* CLAUDE: Body Scroll Lock bei offenem Mobile Menü */
body.pvm-nav-open {
    overflow: hidden;
}

/* ==========================================================================
   CLAUDE: Dark Mode Support
   CLAUDE: Dual-Selector Pattern - Manueller Toggle + System-Präferenz
   ========================================================================== */

/* CLAUDE: Manueller Toggle */
html[data-theme="dark"] .pvm-site-header {
    background: var(--pvm-dark-surface);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

html[data-theme="dark"] .pvm-nav-item > a {
    color: var(--pvm-dark-text);
}

html[data-theme="dark"] .pvm-nav-item > a:hover {
    color: var(--pvm-primary-light, #a855f7);
}

html[data-theme="dark"] .pvm-dropdown-menu {
    background: var(--pvm-dark-surface);
    border: 1px solid var(--pvm-dark-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

html[data-theme="dark"] .pvm-dropdown-menu li a {
    color: var(--pvm-dark-text-muted);
}

html[data-theme="dark"] .pvm-dropdown-menu li a:hover {
    background: var(--pvm-dark-bg);
    color: var(--pvm-primary-light, #a855f7);
}

html[data-theme="dark"] .pvm-dropdown-group__label {
    color: var(--pvm-dark-text-muted);
}

html[data-theme="dark"] .pvm-hamburger span {
    background: var(--pvm-dark-text);
}

html[data-theme="dark"] .pvm-nav-mobile {
    background: var(--pvm-dark-surface);
}

html[data-theme="dark"] .pvm-nav-mobile__header {
    border-bottom-color: var(--pvm-dark-border);
}

html[data-theme="dark"] .pvm-nav-close {
    color: var(--pvm-dark-text);
}

html[data-theme="dark"] .pvm-nav-mobile__item {
    border-bottom-color: var(--pvm-dark-border);
}

html[data-theme="dark"] .pvm-nav-mobile__item > a,
html[data-theme="dark"] .pvm-nav-mobile__row > a {
    color: var(--pvm-dark-text);
}

html[data-theme="dark"] .pvm-accordion-toggle {
    color: var(--pvm-dark-text-muted);
}

html[data-theme="dark"] .pvm-nav-mobile__submenu {
    background: var(--pvm-dark-bg);
}

html[data-theme="dark"] .pvm-nav-mobile__submenu li a {
    color: var(--pvm-dark-text-muted);
}

html[data-theme="dark"] .pvm-nav-mobile__submenu li a:hover {
    color: var(--pvm-primary-light, #a855f7);
}

html[data-theme="dark"] .pvm-nav-mobile__footer {
    border-top-color: var(--pvm-dark-border);
}

/* CLAUDE: System-Präferenz - Fallback */
@media (prefers-color-scheme: dark) {
    html:not([data-theme="light"]) .pvm-site-header {
        background: var(--pvm-dark-surface);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    }

    html:not([data-theme="light"]) .pvm-nav-item > a {
        color: var(--pvm-dark-text);
    }

    html:not([data-theme="light"]) .pvm-nav-item > a:hover {
        color: var(--pvm-primary-light, #a855f7);
    }

    html:not([data-theme="light"]) .pvm-dropdown-menu {
        background: var(--pvm-dark-surface);
        border: 1px solid var(--pvm-dark-border);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    }

    html:not([data-theme="light"]) .pvm-dropdown-menu li a {
        color: var(--pvm-dark-text-muted);
    }

    html:not([data-theme="light"]) .pvm-dropdown-menu li a:hover {
        background: var(--pvm-dark-bg);
        color: var(--pvm-primary-light, #a855f7);
    }

    html:not([data-theme="light"]) .pvm-dropdown-group__label {
        color: var(--pvm-dark-text-muted);
    }

    html:not([data-theme="light"]) .pvm-hamburger span {
        background: var(--pvm-dark-text);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile {
        background: var(--pvm-dark-surface);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile__header {
        border-bottom-color: var(--pvm-dark-border);
    }

    html:not([data-theme="light"]) .pvm-nav-close {
        color: var(--pvm-dark-text);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile__item {
        border-bottom-color: var(--pvm-dark-border);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile__item > a,
    html:not([data-theme="light"]) .pvm-nav-mobile__row > a {
        color: var(--pvm-dark-text);
    }

    html:not([data-theme="light"]) .pvm-accordion-toggle {
        color: var(--pvm-dark-text-muted);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile__submenu {
        background: var(--pvm-dark-bg);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile__submenu li a {
        color: var(--pvm-dark-text-muted);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile__submenu li a:hover {
        color: var(--pvm-primary-light, #a855f7);
    }

    html:not([data-theme="light"]) .pvm-nav-mobile__footer {
        border-top-color: var(--pvm-dark-border);
    }
}