/* ==========================================================
   INVARO GmbH – Stylesheet
   ----------------------------------------------------------
   Farbwelt:
   - Navy:        #0F2A3A  (Headlines, dunkle Sektionen)
   - Salbei Grün: #7A9E85  (Akzente, Buttons, Linien)
   - Hellgrau:    #F5F7F6  (Ruhige Hintergründe)
   - Dunkelgrau:  #4A5A63  (Fließtext)
   - Weiß:        #FFFFFF  (Grundfläche)
   ========================================================== */


/* ==========================================================
   1. ROOT VARIABLEN – Hier kannst du Farben global anpassen
   ========================================================== */
:root {
    --color-navy: #0F2A3A;
    --color-sage: #7A9E85;
    --color-light-gray: #F5F7F6;
    --color-dark-gray: #4A5A63;
    --color-white: #FFFFFF;
    --color-line: #E4E8E9;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

    --max-width: 1280px;
    --max-width-narrow: 820px;
    --content-padding: clamp(1.5rem, 4vw, 3rem);

    --section-spacing: clamp(5rem, 10vw, 9rem);
    --radius-sm: 4px;
    --radius-md: 8px;

    --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}


/* ==========================================================
   2. RESET & GRUNDLAGEN
   ========================================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.65;
    color: var(--color-dark-gray);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-sage);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

h1, h2, h3, h4 {
    color: var(--color-navy);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin: 0 0 1rem;
}

p {
    margin: 0 0 1rem;
}


/* ==========================================================
   3. LAYOUT-CONTAINER
   ========================================================== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

.container-narrow {
    max-width: var(--max-width-narrow);
}

.section {
    padding: var(--section-spacing) 0;
}


/* ==========================================================
   4. NAVIGATION
   ========================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.site-header.scrolled {
    border-bottom-color: var(--color-line);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem var(--content-padding);
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo {
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.18em;
    color: var(--color-navy);
    display: inline-flex;
    align-items: center;
    line-height: 0;
}

.logo-img {
    height: 42px;
    width: auto;
    max-height: 42px;
    max-width: 240px;
    display: block;
    transition: opacity var(--transition);
}

.logo:hover .logo-img {
    opacity: 0.75;
}

@media (max-width: 768px) {
    .logo-img {
        height: 34px;
        max-height: 34px;
        max-width: 180px;
    }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.25rem;
}

.nav-menu a {
    font-size: 0.95rem;
    color: var(--color-navy);
    font-weight: 500;
    position: relative;
}

.nav-menu a:not(.btn)::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -4px;
    height: 1px;
    background: var(--color-sage);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.nav-menu a:not(.btn):hover::after {
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 1.5px;
    background-color: var(--color-navy);
    transition: transform var(--transition), opacity var(--transition);
}


/* ==========================================================
   5. BUTTONS
   ========================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-navy);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-sage);
    color: var(--color-white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-navy);
    border-color: var(--color-navy);
}

.btn-secondary:hover {
    background-color: var(--color-navy);
    color: var(--color-white);
}

.btn-nav {
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
}

.btn-full {
    width: 100%;
}


/* ==========================================================
   6. HERO SECTION
   ========================================================== */
.hero {
    padding-top: clamp(7rem, 14vw, 10rem);
    padding-bottom: var(--section-spacing);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: center;
}

.hero-headline {
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    line-height: 1.08;
    font-weight: 600;
    letter-spacing: -0.025em;
    margin-bottom: 1.75rem;
}

.hero-subheadline {
    font-size: clamp(1.05rem, 1.3vw, 1.18rem);
    line-height: 1.65;
    color: var(--color-dark-gray);
    max-width: 540px;
    margin-bottom: 2.25rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-visual {
    height: 100%;
    min-height: 480px;
}

.hero-image {
    width: 100%;
    height: 100%;
    min-height: 480px;
    max-height: 640px;
    object-fit: cover;
    object-position: center;
    border-radius: var(--radius-md);
    display: block;
}


/* ==========================================================
   7. IMAGE PLACEHOLDERS
   Diese werden ausgetauscht, sobald echte Bilder vorliegen.
   ========================================================== */
.image-placeholder {
    width: 100%;
    height: 100%;
    min-height: 480px;
    background: linear-gradient(135deg, var(--color-light-gray) 0%, #E8ECEC 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(122, 158, 133, 0.08), transparent 60%);
}

.placeholder-label {
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-dark-gray);
    opacity: 0.5;
    position: relative;
    z-index: 1;
}

.image-placeholder-portrait {
    min-height: 540px;
    aspect-ratio: 4 / 5;
    margin-left: auto;
    max-width: 480px;
}

.portrait-image {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    object-position: center top;
    border-radius: var(--radius-md);
    margin-left: auto;
    display: block;
}

.photo-credit {
    max-width: 480px;
    margin: 0.75rem 0 0 auto;
    text-align: right;
    font-size: 0.75rem;
    color: var(--color-dark-gray);
    opacity: 0.6;
    letter-spacing: 0.02em;
}

.photo-credit a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), color var(--transition);
}

.photo-credit a:hover {
    color: var(--color-sage);
    border-bottom-color: var(--color-sage);
}

@media (max-width: 1024px) {
    .photo-credit {
        margin: 0.75rem auto 0;
        text-align: center;
    }
}


/* ==========================================================
   8. SECTION-ALLGEMEIN
   ========================================================== */
.section-headline {
    font-size: clamp(1.85rem, 3.5vw, 2.75rem);
    margin-bottom: 1.5rem;
    line-height: 1.18;
}

.section-headline .accent {
    color: var(--color-sage);
}

.section-intro {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 4rem;
}

.section-lead {
    font-size: 1.1rem;
    color: var(--color-dark-gray);
    line-height: 1.7;
}


/* ==========================================================
   9. KLARHEIT SECTION
   ========================================================== */
.section-klarheit {
    text-align: center;
}

.section-klarheit .section-headline {
    margin-bottom: 2.5rem;
}

.editorial-text {
    text-align: left;
    font-size: 1.1rem;
    line-height: 1.75;
}

.editorial-text p {
    margin-bottom: 1.5rem;
}

.statement {
    margin: 4rem auto 0;
    padding: 2rem 0;
    border-top: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
    font-size: clamp(1.25rem, 2.2vw, 1.65rem);
    font-style: normal;
    font-weight: 500;
    line-height: 1.4;
    color: var(--color-navy);
    max-width: 640px;
    letter-spacing: -0.01em;
}

.statement-centered {
    text-align: center;
    margin-top: 5rem;
}


/* ==========================================================
   10. LEISTUNGEN SECTION
   ========================================================== */
.section-leistungen {
    background-color: var(--color-light-gray);
}

.leistungen-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.leistung-card {
    background-color: var(--color-white);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-line);
    transition: transform var(--transition), border-color var(--transition);
    display: flex;
    flex-direction: column;
}

.leistung-card:hover {
    transform: translateY(-3px);
    border-color: var(--color-sage);
}

.leistung-number {
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    color: var(--color-sage);
    font-weight: 500;
    margin-bottom: 1.25rem;
}

.leistung-title {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.leistung-text {
    color: var(--color-dark-gray);
    margin-bottom: 1.5rem;
}

.leistung-list {
    margin: 0 0 1.5rem;
}

.leistung-list li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.6rem;
    color: var(--color-dark-gray);
    font-size: 0.97rem;
    line-height: 1.55;
}

.leistung-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7rem;
    width: 6px;
    height: 1px;
    background-color: var(--color-sage);
}

.leistung-note {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-line);
    font-size: 0.9rem;
    color: var(--color-dark-gray);
    font-style: italic;
    line-height: 1.55;
}


/* ==========================================================
   11. ANSATZ SECTION
   ========================================================== */
.ansatz-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.5rem;
    position: relative;
}

.ansatz-grid::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 12.5%;
    right: 12.5%;
    height: 1px;
    background-color: var(--color-line);
    z-index: 0;
}

.ansatz-step {
    position: relative;
    z-index: 1;
    background-color: var(--color-white);
    padding-right: 1rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-sage);
    border-radius: 50%;
    color: var(--color-sage);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    background-color: var(--color-white);
}

.step-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.step-text {
    color: var(--color-dark-gray);
    font-size: 0.97rem;
    line-height: 1.6;
}


/* ==========================================================
   12. ERFAHRUNG / SPLIT LAYOUT
   ========================================================== */
.split-layout {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: clamp(3rem, 6vw, 5rem);
    align-items: center;
}

.split-text p {
    color: var(--color-dark-gray);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}


/* ==========================================================
   13. ZUKUNFT SECTION
   ========================================================== */
.section-zukunft {
    background-color: var(--color-light-gray);
}


/* ==========================================================
   14. PROJEKTE / WEITERE TÄTIGKEITSFELDER
   ========================================================== */
.labels {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 2.5rem;
}

.label {
    padding: 0.6rem 1.25rem;
    border: 1px solid var(--color-line);
    border-radius: 999px;
    font-size: 0.92rem;
    color: var(--color-navy);
    letter-spacing: 0.01em;
}


/* ==========================================================
   14b. FAQ SECTION
   ========================================================== */
.section-faq {
    background-color: var(--color-white);
}

.faq-list {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--color-line);
}

.faq-item {
    border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 1.75rem 0;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-navy);
    position: relative;
    padding-right: 2.5rem;
    transition: color var(--transition);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '';
    position: absolute;
    right: 4px;
    top: 50%;
    width: 14px;
    height: 14px;
    border-right: 1.5px solid var(--color-sage);
    border-bottom: 1.5px solid var(--color-sage);
    transform: translateY(-70%) rotate(45deg);
    transition: transform var(--transition);
}

.faq-item[open] summary::after {
    transform: translateY(-30%) rotate(-135deg);
}

.faq-item summary:hover {
    color: var(--color-sage);
}

.faq-answer {
    padding: 0 0 1.75rem;
    color: var(--color-dark-gray);
    line-height: 1.7;
    max-width: 720px;
}

.faq-answer p {
    margin: 0;
}


/* ==========================================================
   15. KONTAKT SECTION
   ========================================================== */
.kontakt-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(3rem, 6vw, 5rem);
    align-items: start;
}

.kontakt-text p {
    color: var(--color-dark-gray);
    line-height: 1.7;
    font-size: 1.05rem;
}

.kontakt-info {
    margin-top: 2.5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--color-line);
}

.kontakt-mail a {
    font-size: 1.15rem;
    color: var(--color-navy);
    font-weight: 500;
    letter-spacing: -0.01em;
}

.kontakt-mail a:hover {
    color: var(--color-sage);
}


/* Formular */
.kontakt-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.85rem;
    color: var(--color-navy);
    margin-bottom: 0.5rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea {
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-navy);
    background-color: var(--color-white);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    transition: border-color var(--transition);
    width: 100%;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-sage);
}

.form-consent {
    flex-direction: row;
    align-items: flex-start;
    gap: 0.75rem;
}

.form-consent input {
    width: auto;
    margin-top: 4px;
    flex-shrink: 0;
    accent-color: var(--color-sage);
}

.form-consent label {
    font-size: 0.85rem;
    color: var(--color-dark-gray);
    line-height: 1.55;
    font-weight: 400;
    margin: 0;
}

.form-consent label a {
    color: var(--color-navy);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-message {
    font-size: 0.95rem;
    padding: 0;
    min-height: 1.5rem;
}

.form-message.success {
    color: var(--color-sage);
}

.form-message.error {
    color: #B14444;
}


/* ==========================================================
   16. FOOTER
   ========================================================== */
.site-footer {
    background-color: var(--color-navy);
    color: rgba(255, 255, 255, 0.75);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
}

.footer-nav ul,
.footer-legal ul {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-nav a,
.footer-legal a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.92rem;
    transition: color var(--transition);
}

.footer-nav a:hover,
.footer-legal a:hover {
    color: var(--color-sage);
}

.footer-bottom {
    padding-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}


/* ==========================================================
   17. ANIMATIONS – Reveal on Scroll
   ========================================================== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    html { scroll-behavior: auto; }
}


/* ==========================================================
   18. RESPONSIVE – Tablet
   ========================================================== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        order: -1;
        min-height: 340px;
    }

    .leistungen-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .ansatz-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2.5rem;
    }

    .ansatz-grid::before {
        display: none;
    }

    .split-layout {
        grid-template-columns: 1fr;
    }

    .image-placeholder-portrait,
    .portrait-image {
        margin: 0 auto;
        max-width: 100%;
    }

    .kontakt-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}


/* ==========================================================
   19. RESPONSIVE – Mobile
   ========================================================== */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: 2rem var(--content-padding);
        gap: 1.5rem;
        align-items: flex-start;
        transform: translateY(-150%);
        transition: transform var(--transition);
        border-bottom: 1px solid var(--color-line);
    }

    .nav-menu.is-open {
        transform: translateY(0);
    }

    .nav-menu a {
        font-size: 1.05rem;
    }

    .btn-nav {
        width: 100%;
    }

    .ansatz-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-buttons .btn {
        flex: 1;
        min-width: 0;
    }

    .leistung-card {
        padding: 2rem 1.5rem;
    }

    .statement {
        font-size: 1.15rem;
    }
}