/* ============================================
   Felix Trautwein Engineering — Custom Styles
   Modern, Unique, Technically Impressive
   ============================================ */

/* CSS Custom Properties */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-gradient: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 50%, #16213e 100%);
    --glow-primary: rgba(102, 126, 234, 0.4);
    --glow-secondary: rgba(240, 147, 251, 0.4);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.18);
    --text-gradient: linear-gradient(90deg, #667eea, #764ba2, #f093fb, #667eea);
    --font-primary: 'Inter', 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ============ TYPOGRAPHY ============ */
body {
    font-family: var(--font-primary);
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 { font-weight: 800; }
h2 { font-weight: 700; }

.lead {
    font-weight: 400;
    letter-spacing: -0.01em;
}

/* ============ LEGAL CONTENT ============ */
.legal-content {
    line-height: 1.75;
    word-break: normal;
    overflow-wrap: anywhere;
    hyphens: auto;
}

.legal-content h3,
.legal-content h4,
.legal-content h5 {
    line-height: 1.3;
}

.legal-content h3 {
    margin-top: 2.25rem;
    margin-bottom: 1rem;
}

.legal-content h4 {
    margin-top: 1.6rem;
    margin-bottom: 0.8rem;
}

.legal-content h5 {
    margin-top: 1.1rem;
    margin-bottom: 0.65rem;
}

.legal-content p,
.legal-content ul {
    margin-bottom: 1rem;
}

.legal-content ul {
    padding-left: 1.15rem;
}

.legal-content li + li {
    margin-top: 0.5rem;
}

@media (max-width: 767.98px) {
    .legal-content {
        line-height: 1.65;
        font-size: 0.96rem;
    }

    .legal-content h3 {
        font-size: 1.35rem;
        margin-top: 1.8rem;
    }

    .legal-content h4 {
        font-size: 1.12rem;
        margin-top: 1.35rem;
    }

    .legal-content h5 {
        font-size: 1rem;
        margin-top: 0.95rem;
    }
}

/* ============ UTILITY CLASSES ============ */
.top-buffer-lg { margin-top: 70px; }
.top-buffer-md { margin-top: 50px; }
.top-buffer-sm { margin-top: 20px; }

.language-select {
    border: 1px solid rgba(102, 126, 234, 0.25);
    background-color: transparent;
    cursor: pointer;
    border-radius: 999px;
    padding: 0.2rem 0.45rem;
    line-height: 1;
    transition: transform 0.3s ease;
}
.language-select:hover { transform: scale(1.1); }

/* ============ ANIMATED GRADIENT TEXT ============ */
.text-gradient-animate {
    background: var(--text-gradient) !important;
    background-size: 300% 300% !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    color: transparent !important;
    animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ============ GLASSMORPHISM NAVIGATION ============ */
.navbar.blur {
    background: rgba(255, 255, 255, 0.75) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.blur:hover {
    background: rgba(255, 255, 255, 0.9) !important;
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.15);
}

.brand-controls {
    min-height: 48px;
}

.nav-utility-controls {
    min-height: 48px;
    gap: 0.35rem;
}

.language-form {
    margin: 0;
}

@media (max-width: 991.98px) {
    .nav-utility-controls .language-form {
        order: 1;
    }

    .nav-utility-controls .navbar-toggler {
        order: 2;
    }
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    margin-bottom: 0;
}

.brand-mark img {
    display: block;
    width: 52px;
    height: 52px;
    object-fit: contain;
}

.navbar-nav .nav-link {
    font-weight: 600;
    font-size: 1.05rem;
    position: relative;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: all 0.3s ease;
    transform: translateX(-50%);
    border-radius: 2px;
}

.navbar-nav .nav-link:hover::after {
    width: 80%;
}

.navbar-nav .nav-link p {
    margin: 0;
    font-weight: 600;
}

/* ============ ENHANCED LINK STYLES ============ */
a:hover, a:focus {
    color: #667eea;
    text-shadow: 0 0 20px var(--glow-primary);
}

/* Keep small CTA labels sharp on hover/focus. */
.btn:hover,
.btn:focus {
    text-shadow: none !important;
}

/* ============ PARALLAX HEADER ENHANCEMENT ============ */
.page-header {
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--dark-gradient);
    opacity: 0.7;
    z-index: 1;
}

.page-header .container {
    position: relative;
    z-index: 2;
}

.agb .page-header,
.impressum .page-header,
.privacy .page-header {
    padding-top: clamp(6rem, 12vh, 8.5rem);
}

/* Animated floating particles in header */
.page-header .floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    overflow: hidden;
    z-index: 1;
    pointer-events: none;
}

.floating-shapes .shape {
    position: absolute;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.35), rgba(240, 147, 251, 0.2));
    border-radius: 50%;
    animation: float 15s infinite ease-in-out;
    box-shadow: 0 0 40px rgba(102, 126, 234, 0.3);
}

.floating-shapes .shape:nth-child(1) { width: 100px; height: 100px; top: 10%; left: 10%; animation-delay: 0s; }
.floating-shapes .shape:nth-child(2) { width: 150px; height: 150px; top: 70%; left: 80%; animation-delay: -5s; }
.floating-shapes .shape:nth-child(3) { width: 80px; height: 80px; top: 40%; left: 60%; animation-delay: -10s; }
.floating-shapes .shape:nth-child(4) { width: 120px; height: 120px; top: 80%; left: 20%; animation-delay: -15s; }
.floating-shapes .shape:nth-child(5) { width: 70px; height: 70px; top: 20%; left: 75%; animation-delay: -7s; }
.floating-shapes .shape:nth-child(6) { width: 110px; height: 110px; top: 60%; left: 40%; animation-delay: -12s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); opacity: 0.7; }
    25% { transform: translate(40px, -40px) rotate(90deg) scale(1.15); opacity: 0.9; }
    50% { transform: translate(0, -80px) rotate(180deg) scale(1); opacity: 0.7; }
    75% { transform: translate(-40px, -40px) rotate(270deg) scale(0.85); opacity: 0.9; }
}

/* ============ HERO TITLE EFFECTS ============ */
.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    animation: titleReveal 1s ease-out forwards;
}

.hero-subtitle {
    animation: subtitleReveal 1s ease-out 0.3s forwards;
    opacity: 0;
}

@keyframes titleReveal {
    from { transform: translateY(30px); opacity: 0; filter: blur(10px); }
    to { transform: translateY(0); opacity: 1; filter: blur(0); }
}

@keyframes subtitleReveal {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ============ ENHANCED WAVE ANIMATION ============ */
.waves {
    height: 100px;
}

.moving-waves > use {
    animation: waveMotion 25s cubic-bezier(.55,.5,.45,.5) infinite;
}

.moving-waves > use:nth-child(1) { animation-delay: -2s; animation-duration: 7s; }
.moving-waves > use:nth-child(2) { animation-delay: -3s; animation-duration: 10s; }
.moving-waves > use:nth-child(3) { animation-delay: -4s; animation-duration: 13s; }
.moving-waves > use:nth-child(4) { animation-delay: -5s; animation-duration: 20s; }
.moving-waves > use:nth-child(5) { animation-delay: -6s; animation-duration: 17s; }
.moving-waves > use:nth-child(6) { animation-delay: -7s; animation-duration: 25s; }

@keyframes waveMotion {
    0% { transform: translate3d(-90px, 0, 0); }
    100% { transform: translate3d(85px, 0, 0); }
}

/* ============ CARD EFFECTS ============ */
.card {
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    border: none;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    transition: all 0.6s ease;
    z-index: 1;
}

.card:hover::before {
    left: 100%;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow:
        0 15px 35px rgba(102, 126, 234, 0.25),
        0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Card Glow Effect */
.card.glow-effect {
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.card.glow-effect:hover {
    border-color: rgba(102, 126, 234, 0.3);
}

/* Sign-in / sign-up plain card: keep edge visible at rest */
.sign-in-illustration .card.card-plain,
.sign-up-illustration .card.card-plain {
    background-color: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.sign-in-illustration .card.card-plain:hover,
.sign-up-illustration .card.card-plain:hover {
    border-color: rgba(102, 126, 234, 0.3);
}

/* ============ ANIMATED ICON CONTAINERS ============ */
.icon-shape {
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.icon-shape::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: inherit;
    opacity: 0;
    filter: blur(10px);
    transition: opacity 0.4s ease;
    z-index: -1;
}

.card:hover .icon-shape {
    transform: scale(1.15) rotate(5deg);
}

.card:hover .icon-shape::before {
    opacity: 0.6;
}

/* Icon bounce animation */
.icon-shape i {
    transition: transform 0.3s ease;
}

.probefahrt-logo-icon {
    overflow: hidden;
    display: flex !important;
    align-items: center;
    justify-content: center;
}

.probefahrt-favicon {
    width: 90%;
    height: 90%;
    object-fit: contain;
}

.card:hover .icon-shape i {
    animation: iconBounce 0.6s ease;
}

@keyframes iconBounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ============ BUTTON ENHANCEMENTS ============ */
.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    z-index: -1;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow:
        0 10px 30px rgba(0, 0, 0, 0.2),
        0 0 40px var(--glow-primary);
}

.btn:active {
    transform: translateY(-1px);
}

/* Magnetic button effect handled by JS */
.btn-magnetic {
    transition: transform 0.2s ease-out;
}

/* ============ SECTION TRANSITIONS ============ */
section {
    position: relative;
}

.section-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children animation */
.stagger-reveal > * {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger-reveal.revealed > *:nth-child(1) { transition-delay: 0s; }
.stagger-reveal.revealed > *:nth-child(2) { transition-delay: 0.15s; }
.stagger-reveal.revealed > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-reveal.revealed > *:nth-child(4) { transition-delay: 0.45s; }
.stagger-reveal.revealed > *:nth-child(5) { transition-delay: 0.6s; }
.stagger-reveal.revealed > *:nth-child(6) { transition-delay: 0.75s; }

.stagger-reveal.revealed > * {
    opacity: 1;
    transform: translateY(0);
}

/* ============ PROFILE CARD SPECIAL ============ */
.card-profile {
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.card-profile:hover {
    border-color: rgba(102, 126, 234, 0.3);
}

.card-profile img {
    transition: all 0.5s ease;
    filter: grayscale(20%);
}

.card-profile:hover img {
    filter: grayscale(0%);
    transform: scale(1.03);
}

/* ============ GRADIENT BACKGROUNDS ============ */
.bg-gradient-dark {
    background: var(--dark-gradient) !important;
    position: relative;
}

/* Animated gradient mesh background */
.gradient-mesh {
    position: relative;
    overflow: hidden;
}

.gradient-mesh::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(240, 147, 251, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(79, 172, 254, 0.2) 0%, transparent 40%);
    animation: meshMove 20s ease-in-out infinite;
    z-index: 0;
}

@keyframes meshMove {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

/* ============ ANIMATED DIVIDERS ============ */
.animated-divider {
    height: 4px;
    background: var(--primary-gradient);
    background-size: 200% 100%;
    animation: dividerSlide 3s ease infinite;
    border-radius: 2px;
}

@keyframes dividerSlide {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ============ FOOTER ENHANCEMENT ============ */
footer {
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.5), transparent);
}

footer .social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    margin-right: 0.5rem;
}

footer .social-icon:hover {
    transform: translateY(-5px) scale(1.1);
    background: var(--primary-gradient);
    box-shadow: 0 10px 30px var(--glow-primary);
}

footer .social-icon:hover i {
    color: white !important;
}

footer .footer-legal-block {
    width: 200px;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

@media (min-width: 768px) {
    footer .footer-legal-block {
        position: static;
    }
}

footer .footer-legal-block .nav {
    align-items: center;
}

footer .footer-legal-block .nav-link {
    padding-left: 0;
    padding-right: 0;
}

/* ============ SMOOTH SCROLL ============ */
html {
    scroll-behavior: smooth;
}

/* ============ SELECTION STYLING ============ */
::selection {
    background: rgba(102, 126, 234, 0.3);
    color: inherit;
}

/* ============ CURSOR GLOW EFFECT ============ */
.cursor-glow {
    position: fixed;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.2) 0%, rgba(240, 147, 251, 0.1) 40%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

body:hover .cursor-glow {
    opacity: 1;
}

/* ============ LOADING ANIMATION ============ */
.page-loader {
    position: fixed;
    inset: 0;
    background: var(--dark-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid transparent;
    border-top-color: #667eea;
    border-right-color: #764ba2;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============ RESPONSIVE ADJUSTMENTS ============ */
@media (max-width: 768px) {
    .floating-shapes .shape {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .brand-mark img {
        width: 42px;
        height: 42px;
    }

    .language-select {
        padding: 0.15rem 0.35rem;
    }

    .cursor-glow {
        display: none;
    }
}

/* ============ LEARN MORE ARROW LINK ============ */
.learn-more-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: #667eea;
    position: relative;
    padding-bottom: 2px;
}

.learn-more-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--primary-gradient);
    transition: width 0.35s ease;
    border-radius: 1px;
}

.learn-more-link:hover {
    color: #764ba2;
    -webkit-text-fill-color: transparent;
    text-shadow: none;
}

.learn-more-link:hover::before {
    width: 100%;
}

/* ============ BADGE STYLES ============ */
.badge-outline {
    background-color: transparent !important;
    border: 1.5px solid;
    padding: 0.4rem 0.9rem;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.03em;
    color: #667eea;
    border-color: #667eea;
    transition: all 0.3s ease;
    display: inline-block;
}

.badge-outline:hover {
    background-color: rgba(102, 126, 234, 0.08);
    border-color: #764ba2;
    color: #764ba2;
}

/* ============ REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .cursor-glow { display: none; }
}