/* ===================================
   Responsive Styles — v2.0
   =================================== */

/* Header & Navigation */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.header.sticky {
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: 2px solid var(--color-border);
    cursor: pointer;
    padding: 10px;
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    align-items: center;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.nav-toggle:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.nav-toggle span {
    width: 22px;
    height: 2.5px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.nav-link {
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-image: url('../images/hero/solar-hero.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #fff;
    padding-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        160deg,
        rgba(13, 33, 55, 0.85) 0%,
        rgba(21, 101, 192, 0.6) 50%,
        rgba(255, 140, 0, 0.3) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    padding: 0 var(--spacing-md);
}

.hero-logo {
    width: 320px;
    max-width: 80%;
    margin: 0 auto var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    margin-bottom: var(--spacing-sm);
    color: #fff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-cta .btn-secondary {
    border-color: rgba(255, 255, 255, 0.7);
    color: #fff;
}

.hero-cta .btn-secondary:hover {
    background-color: #fff;
    color: var(--color-accent);
    border-color: #fff;
}

/* Scroll indicator — subtle pulse instead of bounce */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    animation: pulse-fade 2.5s ease-in-out infinite;
}

@keyframes pulse-fade {
    0%, 100% { opacity: 0.4; transform: translateX(-50%) translateY(0); }
    50% { opacity: 1; transform: translateX(-50%) translateY(6px); }
}

/* ===================================
   Stats Section
   =================================== */
.stat-card {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    opacity: 0.85;
}

.stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-unit {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

/* ===================================
   Company Cards
   =================================== */
.company-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.company-logo {
    width: 240px;
    max-width: 100%;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-sm);
}

.company-card h3 {
    margin-bottom: 0.5rem;
}

.company-card p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

/* ===================================
   CTA Section
   =================================== */
.cta {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

/* Gradient transition before footer */
.cta::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

.cta h2 {
    margin-bottom: var(--spacing-sm);
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-light);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: linear-gradient(180deg, var(--color-accent) 0%, #081624 100%);
    color: rgba(255, 255, 255, 0.85);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer h4 {
    color: #fff;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
    font-size: 0.9rem;
}

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

.footer-col p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
}

.footer-col i {
    color: var(--color-primary);
    margin-right: 0.4rem;
    width: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
}

/* ===================================
   Page Hero (internal pages)
   =================================== */
.page-hero {
    background-image: url('../images/hero/projekte-hero.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 140px 0 80px;
    text-align: center;
    position: relative;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(
        160deg,
        rgba(13, 33, 55, 0.88) 0%,
        rgba(21, 101, 192, 0.65) 100%
    );
}

.page-hero .container {
    position: relative;
    z-index: 1;
}

.page-hero-logo {
    width: 280px;
    max-width: 70%;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.page-hero h1 {
    color: #fff;
    margin-bottom: var(--spacing-xs);
}

.page-hero p {
    font-size: 1.1rem;
    opacity: 0.85;
}

/* ===================================
   Projekt Info
   =================================== */
.projekt-info {
    padding: var(--spacing-xl) 0;
}

.projekt-info ul {
    list-style: none;
    padding-left: 0;
}

.projekt-info ul li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.projekt-info ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

/* Tech Data */
.tech-data {
    padding: var(--spacing-xl) 0;
}

.tech-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.tech-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.tech-card h3 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

/* Performance */
.performance {
    padding: var(--spacing-xl) 0;
}

.performance-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.performance-icon {
    font-size: 2rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

/* Company Data */
.company-data {
    padding: var(--spacing-xl) 0;
}

.company-info-box {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.company-info-box p {
    margin-bottom: var(--spacing-sm);
}

.company-info-box i {
    color: var(--color-primary);
    margin-right: var(--spacing-xs);
}

/* ===================================
   Kontakt Page
   =================================== */
.kontakt-info {
    padding: var(--spacing-xl) 0;
}

.kontakt-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.kontakt-logo {
    width: 200px;
    max-width: 60%;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-sm);
}

.kontakt-details {
    text-align: left;
}

.kontakt-details p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
    font-size: 0.95rem;
}

.kontakt-details i {
    color: var(--color-primary);
    margin-right: 0.5rem;
    width: 1.2rem;
    text-align: center;
}

.kontakt-details a {
    color: var(--color-primary);
}

/* Kontakt Form */
.kontakt-form-section {
    padding: var(--spacing-xl) 0;
}

.kontakt-form {
    max-width: 720px;
    margin: var(--spacing-lg) auto 0;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    background: var(--color-bg);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-group textarea {
    resize: vertical;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-weight: normal;
    font-size: 0.9rem;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-top: 3px;
    accent-color: var(--color-primary);
}

.form-actions {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-align: center;
    display: none;
    font-size: 0.9rem;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

/* Map */
.map-section {
    padding: var(--spacing-xl) 0;
}

.map-container {
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.map-container iframe {
    display: block;
    width: 100%;
    height: 400px;
}

@media (max-width: 768px) {
    .map-container iframe {
        height: 280px;
    }
}

/* ===================================
   Über uns Page
   =================================== */
.geschichte {
    padding: var(--spacing-xl) 0;
}

.intro-text {
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.1rem;
    color: var(--color-text-light);
    text-align: center;
}

/* Timeline */
.timeline {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: 72px;
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary), #E67E00);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.25rem;
    box-shadow: var(--shadow-glow);
}

.timeline-content {
    padding: var(--spacing-md);
}

.timeline-content h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

/* Unternehmen Cards (Über uns) */
.unternehmen {
    padding: var(--spacing-xl) 0;
}

.unternehmen-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.unternehmen-logo {
    width: 240px;
    max-width: 100%;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-sm);
}

.unternehmen-subtitle {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.unternehmen-details {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: var(--color-bg-light);
    border-radius: var(--radius-sm);
    text-align: left;
}

.unternehmen-details p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.unternehmen-card h4 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.unternehmen-card ul {
    list-style: none;
    padding: 0;
    text-align: center;
    max-width: 300px;
    margin: 0 auto;
}

.unternehmen-card ul li {
    padding: var(--spacing-xs) 0;
}

/* Mission & Vision */
.mission-vision {
    padding: var(--spacing-xl) 0;
}

.mission-card,
.vision-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.mission-icon,
.vision-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

/* Standort */
.standort {
    padding: var(--spacing-xl) 0;
}

.standort-content {
    max-width: 700px;
    margin: 0 auto;
}

.standort-info ul {
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0;
}

.standort-info ul li {
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.standort-info ul li i {
    color: var(--color-success);
}

/* ===================================
   Media Queries
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
    .hero-logo {
        width: 260px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav {
        justify-content: space-between;
    }

    .nav-toggle {
        display: flex;
        position: relative;
        z-index: 1001;
    }

    .nav-toggle span {
        width: 24px;
        height: 3px;
        background-color: var(--color-accent);
        border-radius: 3px;
    }

    .nav-toggle::after {
        content: 'Menü';
        font-size: 0.7rem;
        font-weight: 600;
        color: var(--color-text);
        margin-top: 3px;
        letter-spacing: 0.03em;
    }

    .nav-toggle.active span {
        opacity: 0;
    }

    .nav-toggle.active::after {
        content: '✕  Schließen';
        font-size: 0.8rem;
        color: var(--color-primary);
        margin-top: 0;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        height: 100vh;
        background-color: #ffffff;
        flex-direction: column;
        padding: 100px var(--spacing-md) var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        z-index: 999;
        align-items: center;
        justify-content: flex-start;
        gap: var(--spacing-sm);
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu .nav-link {
        font-size: 1.2rem;
        padding: 0.75rem 2rem;
        color: var(--color-text);
    }

    body.nav-open {
        overflow: hidden;
    }

    .hero-logo {
        width: 180px;
    }

    .hero {
        padding-top: 100px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
    }

    .stat-card {
        padding: var(--spacing-md);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }

    .page-hero {
        padding: 110px 0 60px;
    }

    .page-hero-logo {
        width: 180px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .kontakt-details {
        text-align: center;
    }

    .timeline::before {
        left: 18px;
    }

    .timeline-item {
        padding-left: 56px;
    }

    .timeline-marker {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .btn {
        padding: 0.7rem 1.25rem;
        font-size: 0.85rem;
    }

    .hero-logo {
        width: 150px;
    }
}