/* SilvaGIS – Stylesheet
   Modern & schlicht, Mobile-first
   Farben aus Logo abgeleitet
*/

:root {
    --color-primary: #000000;
    --color-accent: #76923D;
    --color-accent-dark: #5d7530;
    --color-text: #1a1a1a;
    --color-text-muted: #666666;
    --color-bg: #ffffff;
    --color-bg-light: #f5f5f5;
    --color-bg-dark: #1a1a1a;
    --color-border: #e0e0e0;

    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    --container-max: 1200px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;

    --radius: 4px;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --transition: 0.2s ease-out;
}

/* Reset / Base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-dark); text-decoration: underline; }

h1, h2, h3 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin: 0 0 var(--space-sm);
    color: var(--color-primary);
    font-weight: 700;
    letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); margin-bottom: var(--space-md); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 var(--space-sm); }
.lead { font-size: 1.15rem; }

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-sm);
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm);
    gap: var(--space-sm);
}
.logo-link { display: flex; align-items: center; }
.logo {
    height: 36px;
    width: auto;
}

.primary-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--space-md);
}
.primary-nav a {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
}
.primary-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition);
}
.primary-nav a:hover {
    color: var(--color-accent);
    text-decoration: none;
}
.primary-nav a:hover::after { width: 100%; }

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: 0;
    cursor: pointer;
    padding: 0.5rem;
    width: 44px;
    height: 44px;
    flex-direction: column;
    justify-content: space-around;
}
.menu-toggle span {
    display: block;
    height: 2px;
    width: 24px;
    background: var(--color-primary);
    transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero – Video */
.hero {
    position: relative;
    padding: 0;
    background: var(--color-bg-dark);
    overflow: hidden;
    height: clamp(480px, 80vh, 760px);
}
.hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: 0;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(
        180deg,
        rgba(0,0,0,0.25) 0%,
        rgba(0,0,0,0.45) 50%,
        rgba(0,0,0,0.70) 100%
    );
}
.hero-content {
    position: absolute;
    z-index: 2;
    left: 6%;
    right: 6%;
    bottom: 12%;
    max-width: 720px;
    color: #fff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.55);
}
.hero-title {
    color: #fff;
    margin: 0 0 var(--space-sm);
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.15;
}
.hero-lead {
    font-size: clamp(1rem, 1.6vw, 1.25rem);
    color: #f0f0f0;
    margin: 0 0 var(--space-md);
    max-width: 640px;
    line-height: 1.55;
}

/* Cycling Captions ueber dem Video (synchron zur Szene) */
.hero-captions {
    position: absolute;
    z-index: 2;
    right: 6%;
    bottom: 12%;
    width: clamp(280px, 32vw, 420px);
    text-align: right;
    pointer-events: none;
}
.hero-caption {
    position: absolute;
    right: 0;
    bottom: 0;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    color: #fff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.6);
}
.hero-caption.is-active {
    opacity: 1;
    transform: translateY(0);
}
.hero-caption-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(0,0,0,0.5);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 0.5rem;
    text-shadow: none;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.hero-caption p {
    margin: 0;
    font-size: clamp(0.9rem, 1.2vw, 1.05rem);
    line-height: 1.45;
    color: #f5f5f5;
}

/* Mobile-Anpassungen Hero */
@media (max-width: 719px) {
    .hero { height: clamp(480px, 92vh, 760px); }
    .hero-content {
        left: 5%;
        right: 5%;
        bottom: auto;
        top: 8%;
    }
    .hero-captions {
        left: 5%;
        right: 5%;
        bottom: 8%;
        width: auto;
        text-align: left;
    }
    .hero-caption {
        right: auto;
        left: 0;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.85rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition);
    cursor: pointer;
    border: 0;
    text-decoration: none;
}
.btn-primary {
    background: var(--color-accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-accent-dark);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Sections */
.section {
    padding: var(--space-xl) 0;
}
.section-light { background: var(--color-bg-light); }
.section-dark {
    background: var(--color-bg-dark);
    color: #fff;
}
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark a { color: var(--color-accent); }
.section-dark a:hover { color: #a8c761; }
.section-intro {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 720px;
    margin-bottom: var(--space-md);
}
.section-dark .section-intro { color: #ccc; }

/* Grid 2-Spalten */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    align-items: start;
}

.owner-card {
    background: var(--color-bg);
    padding: var(--space-md);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border-left: 3px solid var(--color-accent);
}
.owner-name {
    font-size: 1.15rem;
    margin: 0 0 0.25rem;
    color: var(--color-primary);
}
.owner-role {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin: 0 0 var(--space-sm);
}
.owner-credentials-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin: var(--space-sm) 0 0.5rem;
}
.owner-credentials {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--color-text);
}
.owner-credentials li {
    padding: 0.15rem 0;
}
.owner-credentials li::before {
    content: "·";
    color: var(--color-accent);
    margin-right: 0.5rem;
    font-weight: 700;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}
.card {
    background: var(--color-bg);
    padding: var(--space-md);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}
.section-light .card {
    background: var(--color-bg);
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.card-icon {
    width: 56px;
    height: 56px;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}
.card-icon svg { width: 100%; height: 100%; }

.project-card .project-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

/* References — zweispaltiges Werkverzeichnis, ohne Box */
.references-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.reference {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem var(--space-lg);
    padding: var(--space-md) 0;
    border-bottom: 1px solid #e0e0e0;
}
.reference:last-child {
    border-bottom: none;
}
.reference h3 {
    margin: 0;
    font-size: 1.25rem;
}
.reference-meta {
    font-size: 0.8rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin: 0.25rem 0 0 0;
}
.reference-desc {
    margin: 0;
    color: var(--color-text-muted);
}
@media (min-width: 720px) {
    .reference {
        grid-template-columns: minmax(220px, 1fr) 2fr;
        align-items: baseline;
    }
    .reference-desc {
        grid-column: 2;
        grid-row: 1 / span 2;
    }
}

/* Planning List */
.planning-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.planning-list li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
}
.planning-list li:last-child { border-bottom: 0; }
.planning-list strong { color: var(--color-primary); }

/* Contact */
#kontakt { padding: var(--space-lg) 0; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}
.contact-item h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin: 0 0 0.25rem;
}
.contact-item a, .contact-item address {
    font-size: 1rem;
    font-style: normal;
    line-height: 1.4;
}

/* Impressum */
.impressum-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-top: var(--space-md);
}
.impressum-grid h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
    margin-top: 0;
}
.impressum-grid address,
.impressum-grid p {
    font-style: normal;
    margin: 0 0 var(--space-sm);
    line-height: 1.55;
}
.impressum-grid .impressum-full {
    grid-column: 1 / -1;
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border);
}
@media (min-width: 720px) {
    .impressum-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md) var(--space-lg);
    }
}

/* Footer */
.site-footer {
    background: var(--color-bg-dark);
    color: #999;
    padding: var(--space-md) 0;
    font-size: 0.9rem;
    border-top: 1px solid #333;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}
.footer-inner p { margin: 0; }
.footer-meta { color: #666; }
.brand-name {
    color: var(--color-accent);
    font-weight: 600;
}

/* Responsive — Tablet+ */
@media (min-width: 720px) {
    .grid-2 {
        grid-template-columns: 2fr 1fr;
        gap: var(--space-lg);
    }
    .cards { grid-template-columns: repeat(3, 1fr); }
    .contact-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Responsive — Mobile (Hamburger Menu) */
@media (max-width: 719px) {
    .menu-toggle { display: flex; }
    .primary-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }
    .primary-nav.open { max-height: 400px; }
    .primary-nav ul {
        flex-direction: column;
        gap: 0;
        padding: var(--space-sm);
    }
    .primary-nav li { border-bottom: 1px solid var(--color-border); }
    .primary-nav li:last-child { border-bottom: 0; }
    .primary-nav a {
        display: block;
        padding: var(--space-sm) 0;
    }
    .primary-nav a::after { display: none; }
    .logo { height: 28px; }
}

/* Reduce-Motion respektieren */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}