/* ==========================================================================
   Helionis Group LLC — Stylesheet
   Clean, professional, compliance-ready corporate design
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Colors */
    --color-bg: #fafaf8;
    --color-bg-alt: #f4f3ef;
    --color-bg-dark: #1a1a2e;
    --color-bg-card: #ffffff;
    
    --color-text-primary: #1a1a2e;
    --color-text-secondary: #4a4a5e;
    --color-text-muted: #8a8a9e;
    --color-text-light: #c0c0ce;
    --color-text-on-dark: #f0efe9;
    
    --color-accent: #c9a96e;
    --color-accent-dark: #a88b50;
    --color-accent-light: #dfc9a0;
    --color-accent-subtle: rgba(201, 169, 110, 0.08);
    
    --color-border: #e8e6de;
    --color-border-light: #f0eee6;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    
    /* Sizing */
    --max-width: 1200px;
    --nav-height: 72px;
    
    /* Borders */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.04), 0 1px 2px rgba(26, 26, 46, 0.02);
    --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.06), 0 2px 4px rgba(26, 26, 46, 0.03);
    --shadow-lg: 0 12px 40px rgba(26, 26, 46, 0.08), 0 4px 12px rgba(26, 26, 46, 0.04);
    --shadow-accent: 0 4px 20px rgba(201, 169, 110, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-text-primary);
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }
h4 { font-size: 1rem; font-weight: 500; }

p {
    color: var(--color-text-secondary);
    line-height: 1.75;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-bg);
    border-color: var(--color-text-primary);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-text-primary);
}

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

.btn-secondary:hover {
    border-color: var(--color-text-primary);
    background: var(--color-accent-subtle);
}

/* ---------- Header & Navigation ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(250, 250, 248, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.site-header.scrolled {
    border-bottom-color: var(--color-border-light);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 450;
    color: var(--color-text-secondary);
    position: relative;
    padding: var(--space-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 22px;
    height: 1.5px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-xl) var(--space-4xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(201, 169, 110, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(201, 169, 110, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    border: 1px solid rgba(201, 169, 110, 0.15);
    padding: 0.35rem 0.9rem;
    border-radius: 100px;
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.hero-title .llc {
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: 0.6em;
    vertical-align: super;
    margin-left: 0.1em;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    font-weight: 400;
    color: var(--color-accent-dark);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-visual {
    position: absolute;
    right: -2%;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    max-width: 550px;
    opacity: 0.7;
    z-index: 0;
}

.hero-illustration {
    width: 100%;
    height: auto;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ---------- Section Commons ---------- */
.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-5xl) var(--space-xl);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-divider {
    width: 48px;
    height: 2px;
    background: var(--color-accent);
    margin: 0 auto var(--space-lg);
    border-radius: 2px;
}

.section-subtitle {
    max-width: 560px;
    margin: 0 auto;
    font-size: 1.05rem;
    color: var(--color-text-muted);
}

/* ---------- About Section ---------- */
.about {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-lead {
    font-size: 1.1rem;
    font-weight: 450;
    color: var(--color-text-primary);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.about-text p {
    margin-bottom: var(--space-lg);
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border-light);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.95rem;
    font-weight: 450;
    color: var(--color-text-primary);
}

.highlight-item svg {
    width: 22px;
    height: 22px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-illustration {
    width: 100%;
    max-width: 420px;
    height: auto;
}

.about-image {
    width: 100%;
    max-width: 460px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Hero background image */
.hero-bg-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.35;
    z-index: 0;
}

.hero-grid {
    z-index: 1;
}

/* ---------- Services Section ---------- */
.services {
    background: var(--color-bg-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-accent-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    color: var(--color-accent-dark);
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    background: var(--color-accent);
    color: white;
}

.service-icon svg {
    width: 26px;
    height: 26px;
}

.service-title {
    font-size: 1.15rem;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.service-description {
    font-size: 0.925rem;
    line-height: 1.75;
    color: var(--color-text-secondary);
}

/* ---------- Contact Section ---------- */
.contact {
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-3xl);
    align-items: flex-start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.contact-card:hover {
    border-color: var(--color-accent-light);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    border-radius: var(--radius-sm);
    color: var(--color-accent-dark);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 20px;
    height: 20px;
}

.contact-detail h4 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.contact-detail a,
.contact-detail p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.contact-detail a:hover {
    color: var(--color-accent-dark);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text-primary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    outline: none;
}

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

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    padding: 0.85rem;
    font-size: 0.95rem;
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--color-bg-dark);
    color: var(--color-text-on-dark);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-4xl) var(--space-xl) var(--space-xl);
}

.footer-main {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-on-dark);
    margin-bottom: var(--space-lg);
}

.footer-logo .logo-icon {
    color: var(--color-accent);
}

.footer-description {
    font-size: 0.9rem;
    color: rgba(240, 239, 233, 0.6);
    max-width: 320px;
    line-height: 1.7;
}

.footer-links-group {
    display: flex;
    gap: var(--space-2xl);
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(240, 239, 233, 0.5);
    margin-bottom: var(--space-lg);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-col a {
    font-size: 0.9rem;
    color: rgba(240, 239, 233, 0.7);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(240, 239, 233, 0.35);
}

/* ---------- Animations ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger delay for service cards */
.service-card:nth-child(2) { transition-delay: 80ms; }
.service-card:nth-child(3) { transition-delay: 160ms; }
.service-card:nth-child(4) { transition-delay: 240ms; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .hero-visual {
        width: 40%;
        opacity: 0.4;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .about-visual {
        order: -1;
    }
    
    .about-illustration {
        max-width: 320px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(250, 250, 248, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-lg);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }
    
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        min-height: auto;
        padding-top: calc(var(--nav-height) + var(--space-3xl));
        padding-bottom: var(--space-3xl);
    }
    
    .hero-visual {
        display: none;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        flex-direction: column;
        gap: var(--space-2xl);
    }
    
    .footer-links-group {
        gap: var(--space-2xl);
    }
    
    .section-container {
        padding: var(--space-3xl) var(--space-lg);
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .footer-links-group {
        flex-direction: column;
        gap: var(--space-xl);
    }
}