/* Fixed Glass Navigation für Die Rescue Trainer Website */
/* Starker Glaseffekt ohne Größenänderungen oder ovale Ecken */

/* Navigation Base Styles - Enhanced Glass */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px) saturate(150%);
    -webkit-backdrop-filter: blur(12px) saturate(150%);
    border-bottom: 1px solid rgba(59, 130, 246, 0.08);
    z-index: 1000;
    transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
    padding-top: var(--safe-area-inset-top, 0);
    padding-left: var(--safe-area-inset-left, 0);
    padding-right: var(--safe-area-inset-right, 0);
    width: 100%;
    border-radius: 0;
    margin: 0;
    transform: translateZ(0);
}

/* Intense Glass Effect on Scroll - Keeps Same Size */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.05) !important;
    backdrop-filter: blur(50px) saturate(300%) brightness(120%) !important;
    -webkit-backdrop-filter: blur(50px) saturate(300%) brightness(120%) !important;
    border-bottom: 1px solid rgba(59, 130, 246, 0.2) !important;
    box-shadow: 
        0 8px 40px rgba(0, 0, 0, 0.15),
        0 4px 20px rgba(59, 130, 246, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3) !important;
    /* NO border-radius changes, NO margin changes, NO transform scale */
}

/* Dark mode navbar */
[data-theme="dark"] .navbar {
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(17, 24, 39, 0.3) !important;
    backdrop-filter: blur(50px) saturate(300%) brightness(130%) !important;
    -webkit-backdrop-filter: blur(50px) saturate(300%) brightness(130%) !important;
    border-bottom: 1px solid rgba(59, 130, 246, 0.3) !important;
    box-shadow: 
        0 8px 40px rgba(0, 0, 0, 0.3),
        0 4px 20px rgba(59, 130, 246, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2) !important;
}

/* Navigation Container - Fixed Size */
.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    box-sizing: border-box;
    /* NO transition for size changes */
}

/* Logo - Fixed Size */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: transform 0.2s ease;
    transform: translateZ(0);
}

.logo:hover {
    transform: scale(1.02) translateY(-1px) translateZ(0);
}

.logo-img {
    width: 50px;
    height: 50px;
    /* NO size changes on scroll */
    transform: translateZ(0);
}

.logo h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: #333;
    margin: 0;
    /* NO size changes on scroll */
    transform: translateZ(0);
}

[data-theme="dark"] .logo h2 {
    color: #f1f5f9;
}

.logo-accent {
    color: #3b82f6;
    background: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation Links */
.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2rem;
    align-items: center;
}

.nav-menu li {
    position: relative;
    transform: translateZ(0);
}

.nav-menu a {
    position: relative;
    color: #333;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
    overflow: hidden;
    display: block;
    transform: translateZ(0);
}

[data-theme="dark"] .nav-menu a {
    color: #f1f5f9;
}

/* Navigation Hover Underline Animation */
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    transform: translateX(-50%);
    border-radius: 1px;
}

.nav-menu a:hover::after {
    width: 80%;
}

[data-theme="dark"] .nav-menu a::after {
    background: linear-gradient(90deg, #60a5fa, #93c5fd);
}

/* CTA Button - Fixed Size */
.cta-button {
    background: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 
        0 4px 20px rgba(59, 130, 246, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    transform: translateZ(0);
    /* NO size changes */
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-2px) scale(1.02) translateZ(0);
    box-shadow: 
        0 8px 30px rgba(59, 130, 246, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* Mobile Menu Button */
.hamburger {
    display: none;
    background: none;
    border: none;
    color: #333;
    cursor: pointer;
    padding: 8px;
    transition: transform 0.3s ease;
    position: relative;
    width: 32px;
    height: 32px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateZ(0);
}

[data-theme="dark"] .hamburger {
    color: #f1f5f9;
}

.hamburger:hover {
    transform: scale(1.05) translateZ(0);
}

.hamburger span {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: #333;
    border-radius: 2px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg) translateZ(0);
    transition: all 0.3s ease;
}

[data-theme="dark"] .hamburger span {
    background: #f1f5f9;
}

.hamburger span:nth-child(1) {
    top: 8px;
}

.hamburger span:nth-child(2) {
    top: 15px;
}

.hamburger span:nth-child(3) {
    top: 22px;
}

/* Hamburger Active State */
.hamburger.active span:nth-child(1) {
    top: 15px;
    transform: rotate(135deg) translateZ(0);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    left: -60px;
}

.hamburger.active span:nth-child(3) {
    top: 15px;
    transform: rotate(-135deg) translateZ(0);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .nav-container {
        padding: 1rem 1.5rem;
    }
    
    .nav-menu {
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-container {
        padding: 1rem;
    }
    
    .cta-button {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .logo h2 {
        font-size: 1.3rem;
    }
    
    .logo-img {
        width: 45px;
        height: 45px;
    }
    
    .nav-container {
        padding: 0.75rem;
        height: 75px;
    }
}

/* Performance Optimizations */
.navbar {
    will-change: background, backdrop-filter, box-shadow;
    transform: translateZ(0);
}

/* Smooth Body Adjustment */
body {
    padding-top: 80px;
}

@media (max-width: 480px) {
    body {
        padding-top: 75px;
    }
}

/* Hardware Acceleration for animated elements */
.navbar *,
.nav-menu *,
.cta-button * {
    transform: translateZ(0);
}

/* Enhanced Focus States */
.nav-menu a:focus,
.cta-button:focus,
.hamburger:focus {
    outline: 2px solid rgba(59, 130, 246, 0.5);
    outline-offset: 2px;
    transition: outline 0.2s ease;
}