/* ===== CSS Custom Properties ===== */
:root {
    /* Backgrounds – DESIGN.md §2 */
    --bg-darkest:   #171a21;
    --bg-primary:   #1b2838;
    --bg-secondary: #2a475e;
    --bg-tertiary:  #1e3a4c;
    --bg-input:     #32465a;
    --bg-modal:     #171d25;

    /* Accents – DESIGN.md §2 */
    --accent:           #66c0f4;
    --accent-hover:     #67c1f5;
    --accent-light:     #a5d7f7;
    --accent-dark:      #417a9b;
    --accent-glow:      rgba(102, 192, 244, 0.3);
    --purchase-green:       #5c7e10;
    --purchase-green-hover: #6d8f1a;
    --wishlist-blue:    #4c6b8a;

    /* Text – DESIGN.md §2 */
    --text-primary:   #c7d5e0;
    --text-secondary: #8f98a0;
    --text-muted:     #6b7785;
    --text-bright:    #ffffff;
    --text-link:      #66c0f4;
    --text-link-hover: #ffffff;
    --text-price:     #acdbf5;
    --text-discount:  #a4d007;

    /* Borders */
    --border: #0e1a26;
    --border-input: #233c4d;

    /* Radius */
    --radius-sm: 3px;
    --radius-md: 3px;
    --radius-lg: 3px;

    /* Font – DESIGN.md §3 */
    --font: "Motiva Sans", "Inter", Arial, Helvetica, sans-serif;
    --font-mono: Consolas, Monaco, "Courier New", monospace;

    --header-height: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--text-link-hover);
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
    color: var(--text-bright);
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }

/* ===== Utilities ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
}

.section-heading {
    margin-bottom: 16px;
}

.section-description {
    max-width: 600px;
    margin-bottom: 48px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 400;
    cursor: pointer;
    transition: all 0.15s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(to bottom, #6fa720 5%, #588a1b 95%);
    color: #d2e885;
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(to bottom, #8ed629 5%, #6aa621 95%);
    color: var(--text-bright);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.4);
    transform: none;
}

.btn-outline {
    background: rgba(103, 193, 245, 0.2);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-outline:hover {
    background: rgba(103, 193, 245, 0.4);
    color: var(--text-bright);
    transform: none;
}

.btn-arrow {
    transition: transform 0.2s;
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background: var(--bg-darkest);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: var(--bg-darkest);
    border-bottom-color: var(--border);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-bright);
    text-decoration: none;
}

.logo span {
    color: var(--accent);
}

.logo .logo-sub {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text-bright);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ===== Mobile Navigation ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-darkest);
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
    }

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

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(to bottom, var(--bg-primary) 0%, var(--bg-darkest) 100%);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(102, 192, 244, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 192, 244, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero h1 .highlight {
    color: var(--accent);
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 560px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== Services Section ===== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    transition: all 0.15s ease;
}

.service-card:hover {
    transform: scale(1.02);
    border-color: var(--accent-dark);
    box-shadow: 0 0 15px var(--accent-glow);
}

.service-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
    color: var(--accent);
}

.service-card h3 {
    margin-bottom: 12px;
}

.service-card p {
    margin-bottom: 24px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--accent);
}

.service-link:hover .btn-arrow {
    transform: translateX(4px);
}

.service-link .btn-arrow {
    transition: transform 0.2s;
}

/* ===== Training Section ===== */
.training-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: start;
}

@media (min-width: 768px) {
    .training-grid {
        grid-template-columns: 1fr 1fr;
        gap: 64px;
    }
}

.training-info h2 {
    margin-bottom: 20px;
}

.training-info > p {
    margin-bottom: 32px;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.feature-check {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(102, 192, 244, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-check svg {
    width: 12px;
    height: 12px;
    color: var(--accent);
}

/* ===== Form ===== */
.form-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.form-card h3 {
    margin-bottom: 28px;
    font-size: 1.35rem;
    color: var(--text-bright);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.9rem;
    transition: border-color 0.2s, background 0.2s;
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    background: #3d5166;
    box-shadow: none;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238f98a0' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

.form-group select option {
    background: var(--bg-input);
    color: var(--text-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 480px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: 1rem;
    font-weight: 400;
    margin-top: 8px;
}

/* Form Success Message */
.form-success {
    display: none;
    text-align: center;
    padding: 48px 24px;
}

.form-success.show {
    display: block;
}

.form-success-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: rgba(102, 192, 244, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-success-icon svg {
    width: 32px;
    height: 32px;
    color: var(--accent);
}

.form-success h3 {
    margin-bottom: 12px;
    color: var(--text-bright);
}

.form-success p {
    color: var(--text-secondary);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-darkest);
    border-top: 1px solid var(--border);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    padding-bottom: 48px;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.9rem;
    max-width: 320px;
    color: var(--text-secondary);
}

.footer h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--text-bright);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 0.9rem;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact-item svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--accent);
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--text-muted);
}

.footer-legal a:hover {
    color: var(--text-secondary);
}

/* ===== PC Konfigurator Section ===== */
.konfigurator-wrapper {
    position: relative;
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-darkest);
    min-height: 600px;
}

.konfigurator-wrapper iframe {
    display: block;
    width: 100%;
    height: 800px;
    border: none;
}

@media (max-width: 768px) {
    .konfigurator-wrapper iframe {
        height: 600px;
    }
}

/* Form Error Message */
.form-error {
    margin-top: 12px;
    padding: 12px 16px;
    background: rgba(195, 60, 60, 0.12);
    border: 1px solid rgba(195, 60, 60, 0.4);
    border-radius: var(--radius-sm);
    color: #f18b8b;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ===== About / Über uns Section ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: all 0.15s ease;
}

.stat-card:hover {
    border-color: var(--accent-dark);
    box-shadow: 0 0 15px var(--accent-glow);
}

.stat-number {
    display: block;
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-plus {
    font-size: 0.7em;
    vertical-align: super;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.about-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    transition: all 0.15s ease;
}

.about-card:hover {
    border-color: var(--accent-dark);
    box-shadow: 0 0 15px var(--accent-glow);
}

.about-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 16px;
    color: var(--accent);
}

.about-card h3 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.about-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ===== Kontakt Section ===== */
.kontakt-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: start;
}

@media (min-width: 768px) {
    .kontakt-grid {
        grid-template-columns: 1fr 1.6fr;
        gap: 64px;
    }
}

.kontakt-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.kontakt-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.kontakt-info-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(102, 192, 244, 0.1);
    border: 1px solid rgba(102, 192, 244, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.kontakt-info-icon svg {
    width: 18px;
    height: 18px;
    color: var(--accent);
}

.kontakt-info-item div {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.kontakt-info-item strong {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.kontakt-info-item span,
.kontakt-info-item a {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.kontakt-info-item a:hover {
    color: var(--text-bright);
}

/* ===== Scroll Animations ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }