/* ============================================
   Helvetic AI Solutions GmbH — Main Stylesheet
   ============================================ */

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

:root {
    --bg-primary: #07080d;
    --bg-secondary: #0d0f17;
    --bg-card: #111827;
    --bg-card-hover: #1a2237;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #1e293b;
    --border-light: #334155;
    --gradient-hero: linear-gradient(135deg, #07080d 0%, #0f172a 50%, #07080d 100%);
    --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 70ch;
}

/* --- Ambient Background Canvas --- */
.bg-ambient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

body > *:not(.bg-ambient) {
    position: relative;
    z-index: 1;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(7, 8, 13, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

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

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

.nav-links a {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: var(--accent-glow);
}

/* Mobile menu toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 6px 0;
    border-radius: 2px;
    transition: all var(--transition);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: var(--accent-glow);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-light);
    margin-bottom: 1.5rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.hero h1 {
    margin-bottom: 1.5rem;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--accent-light), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: var(--accent-light);
    color: #fff;
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.45);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
}

.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* --- Cards --- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    transition: all var(--transition);
}

.card:hover {
    border-color: var(--border-light);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: 12px;
    margin-bottom: 1.25rem;
    font-size: 1.4rem;
}

.card h3 {
    margin-bottom: 0.75rem;
}

.card p {
    font-size: 0.95rem;
}

/* --- Grid Layouts --- */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

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

/* --- Section Headers --- */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header .section-label {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

.section-header h2 {
    margin-bottom: 1rem;
}

.section-header p {
    margin: 0 auto;
    font-size: 1.05rem;
}

/* --- Stats Row --- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin: 4rem 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-number .accent {
    color: var(--accent-light);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- Team Section --- */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.team-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition);
}

.team-card:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.team-card-image {
    width: 100%;
    aspect-ratio: 3 / 4;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.team-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}

.team-card-image .placeholder-icon {
    font-size: 4rem;
    color: var(--border-light);
}

.team-card-info {
    padding: 1.5rem;
}

.team-card-info h3 {
    font-size: 1.15rem;
    margin-bottom: 0.25rem;
}

.team-card-info .role {
    font-size: 0.88rem;
    color: var(--accent-light);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.team-card-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* --- Philosophy Page --- */
.philosophy-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 6rem;
}

.philosophy-block:nth-child(even) {
    direction: rtl;
}

.philosophy-block:nth-child(even) > * {
    direction: ltr;
}

.philosophy-image {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card));
    border-radius: 16px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.philosophy-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
}

.philosophy-image .placeholder-icon {
    font-size: 3rem;
    color: var(--border-light);
}

.philosophy-text h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.philosophy-text p {
    margin-bottom: 1rem;
}

/* Goals / Timeline */
.goals-list {
    max-width: 700px;
    margin: 0 auto;
}

.goal-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
}

.goal-item:last-child {
    border-bottom: none;
}

.goal-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
    font-weight: 700;
    color: var(--accent-light);
    font-size: 1.1rem;
}

.goal-content h4 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.goal-content p {
    font-size: 0.95rem;
}

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition);
}

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

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-info-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
}

.contact-info-block h3 {
    margin-bottom: 1.5rem;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-detail-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: 10px;
    font-size: 1.1rem;
}

.contact-detail h4 {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.contact-detail p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* --- Footer --- */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 3rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.footer-brand h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    font-size: 0.88rem;
    color: var(--text-muted);
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 3rem;
}

.footer-links-col h5 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

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

.footer-links-col li {
    margin-bottom: 0.5rem;
}

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

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    color: var(--text-muted);
}

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

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

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

/* --- Legal Pages (Impressum / Datenschutz) --- */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
    padding-top: 120px;
    padding-bottom: 4rem;
}

.legal-content h1 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
}

.legal-content h2 {
    font-size: 1.4rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.legal-content h3 {
    font-size: 1.15rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

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

.legal-content ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.legal-content li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}

/* --- Page Header (inner pages) --- */
.page-header {
    padding-top: calc(72px + 5rem);
    padding-bottom: 4rem;
    background: var(--gradient-hero);
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.page-header .section-label {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

.page-header h1 {
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.1rem;
    max-width: 600px;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .philosophy-block:nth-child(even) {
        direction: ltr;
    }
}

@media (max-width: 768px) {
    section {
        padding: 4rem 0;
    }

    .container {
        padding: 0 1.25rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(7, 8, 13, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border);
    }

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

    .nav-toggle {
        display: block;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

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

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

    .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-links {
        gap: 2rem;
        flex-wrap: wrap;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .hero {
        min-height: auto;
        padding-top: calc(72px + 3rem);
        padding-bottom: 3rem;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        justify-content: center;
    }
}

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

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