/* =============================================
   ATX Software Labs — Stylesheet
   Clean, minimal, black & white
   ============================================= */

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

:root {
    --bg: #ffffff;
    --bg-light: #f8f8f8;
    --text: #111111;
    --text-secondary: #555555;
    --text-muted: #999999;
    --border: #e5e5e5;
    --border-dark: #d0d0d0;
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 16px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: 0.25s ease;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.nav.scrolled {
    border-bottom-color: var(--border);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 64px;
}

.hero-content {
    max-width: 800px;
    padding: 80px 24px 120px;
}

.hero-title {
    font-size: clamp(2.5rem, 5.5vw, 4.2rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 28px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto 44px;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    justify-content: center;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 100px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font);
    text-decoration: none;
}

.btn-primary {
    background: var(--text);
    color: var(--bg);
    padding: 14px 36px;
}

.btn-primary:hover {
    background: #333333;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-full {
    width: 100%;
}

/* --- Sections --- */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    color: var(--text);
}

/* --- Contact --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 36px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

.contact-link svg {
    flex-shrink: 0;
    color: var(--text-muted);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

.form-group input,
.form-group textarea {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: 0.95rem;
    color: var(--text);
    font-family: var(--font);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--text);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.06);
}

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

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- Animations --- */
.animate-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Legal Pages (Privacy, Terms) --- */
.legal-page.main, .legal-page main, .legal-page .container.section, .container.legal-page {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 32px;
    padding-right: 32px;
}
.legal-page h2, .legal-page h1 {
    margin-top: 48px;
    margin-bottom: 18px;
}
.legal-page h1 {
    margin-top: 32px;
}
.legal-page p, .legal-page ul, .legal-page ol {
    margin-bottom: 28px;
}
@media (max-width: 600px) {
    .legal-page.main, .legal-page main, .legal-page .container.section, .container.legal-page {
        padding-left: 12px;
        padding-right: 12px;
    }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        padding: 60px 0 80px;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .section {
        padding: 72px 0;
    }

    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}