/* =====================================================
   Helicon Solutions LLC - Landing Page Styles
   ===================================================== */

/* CSS Variables */
:root {
    /* Brand Colors */
    --navy: #1a2332;
    --navy-deep: #0f1521;
    --charcoal: #2d3748;
    --charcoal-light: #4a5568;
    --white: #ffffff;
    --off-white: #f7f8fa;
    --accent-blue: #3b82f6;
    --accent-blue-light: #60a5fa;
    --accent-blue-dark: #2563eb;
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 50%, #1e3a5f 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-dark) 100%);
    
    /* Typography */
    --font-heading: 'Sora', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --section-padding: clamp(80px, 12vw, 140px);
    --container-max: 1200px;
    --container-padding: clamp(20px, 5vw, 40px);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
}

/* 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: 1.6;
    color: var(--charcoal);
    background: var(--white);
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

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

p {
    max-width: 65ch;
}

/* Section Base */
.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: clamp(48px, 8vw, 72px);
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-blue);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    color: var(--navy);
}

/* =====================================================
   Navigation
   ===================================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(26, 35, 50, 0.95);
    backdrop-filter: blur(12px);
    padding: 12px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--white);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 18px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--accent-blue);
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    background: var(--gradient-accent);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--navy-deep);
    padding: 24px;
    flex-direction: column;
    gap: 16px;
    z-index: 999;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: all var(--transition-base);
}

.mobile-menu.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.mobile-menu a {
    color: var(--white);
    font-size: 16px;
    font-weight: 500;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* =====================================================
   Hero Section
   ===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}

.hero-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.4;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
}

.hero-pattern::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%233b82f6' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    background: linear-gradient(to top, var(--navy-deep), transparent);
}

.hero-content {
    position: relative;
    text-align: center;
    padding: 120px 0 80px;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50px;
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    backdrop-filter: blur(8px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    color: var(--white);
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 2px;
    animation: scrollBounce 1.5s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(8px); opacity: 0.3; }
}

/* Animate In */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    animation: animateIn 0.8s ease forwards;
}

.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.2s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.4s; }

@keyframes animateIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =====================================================
   About Section
   ===================================================== */
.about {
    background: var(--off-white);
}

.about-grid {
    display: grid;
    gap: 60px;
}

.about-intro {
    text-align: center;
}

.large-text {
    font-size: clamp(18px, 2.5vw, 24px);
    line-height: 1.7;
    color: var(--charcoal);
    max-width: 800px;
    margin: 0 auto;
}

.value-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.value-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all var(--transition-base);
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.value-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.value-icon svg {
    width: 24px;
    height: 24px;
    color: var(--accent-blue);
}

.value-card h3 {
    font-size: 18px;
    color: var(--navy);
    margin-bottom: 12px;
}

.value-card p {
    font-size: 15px;
    color: var(--charcoal-light);
    line-height: 1.6;
}

/* =====================================================
   Services Section
   ===================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.service-card {
    background: linear-gradient(180deg, var(--off-white) 0%, var(--white) 100%);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-lg);
    padding: 40px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.1);
}

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

.service-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: 20px;
    opacity: 0.8;
}

.service-card h3 {
    font-size: 22px;
    color: var(--navy);
    margin-bottom: 16px;
}

.service-card p {
    color: var(--charcoal-light);
    margin-bottom: 24px;
    line-height: 1.7;
}

.service-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-features li {
    font-size: 13px;
    font-weight: 500;
    color: var(--charcoal);
    background: rgba(59, 130, 246, 0.08);
    padding: 6px 12px;
    border-radius: 50px;
}

/* =====================================================
   Portfolio Section
   ===================================================== */
.portfolio {
    background: var(--navy);
    color: var(--white);
}

.portfolio .section-tag {
    color: var(--accent-blue-light);
}

.portfolio .section-title {
    color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 48px;
}

.portfolio-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.portfolio-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
}

.portfolio-image {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0.02) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-visual {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-visual svg {
    width: 100%;
    height: 100%;
    color: rgba(255, 255, 255, 0.2);
}

.portfolio-content {
    padding: 28px;
}

.portfolio-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.portfolio-content p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 15px;
    margin-bottom: 20px;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tags span {
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-blue-light);
    background: rgba(59, 130, 246, 0.15);
    padding: 5px 12px;
    border-radius: 50px;
}

.portfolio-note {
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    font-style: italic;
}

/* =====================================================
   Approach Section
   ===================================================== */
.approach {
    background: var(--off-white);
}

.approach-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.principles {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.principle-group h3 {
    font-size: 18px;
    color: var(--navy);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.principle-group h3::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.principle-group ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.principle-group li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--charcoal);
}

.principle-group li svg {
    color: var(--accent-blue);
    flex-shrink: 0;
}

.tech-stack {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.tech-stack h3 {
    font-size: 18px;
    color: var(--navy);
    margin-bottom: 28px;
    text-align: center;
}

.tech-icons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.tech-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    background: var(--off-white);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.tech-item:hover {
    background: rgba(59, 130, 246, 0.08);
    transform: translateY(-2px);
}

.tech-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--charcoal);
}

/* =====================================================
   Trust Section
   ===================================================== */
.trust {
    background: var(--white);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.trust-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 28px 36px;
    background: var(--off-white);
    border-radius: var(--radius-md);
    min-width: 180px;
    text-align: center;
    transition: all var(--transition-base);
}

.trust-badge:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.trust-badge svg {
    width: 32px;
    height: 32px;
    color: var(--accent-blue);
}

.trust-badge span {
    font-size: 14px;
    font-weight: 600;
    color: var(--navy);
}

.trust-badge small {
    font-size: 12px;
    color: var(--charcoal-light);
    margin-top: -8px;
}

/* =====================================================
   Contact Section
   ===================================================== */
.contact {
    background: linear-gradient(180deg, var(--off-white) 0%, var(--white) 100%);
}

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

.contact-info .section-tag {
    text-align: left;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.contact-info > p {
    color: var(--charcoal-light);
    margin-bottom: 32px;
    line-height: 1.7;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 15px;
    color: var(--charcoal);
    transition: color var(--transition-fast);
}

.contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--accent-blue);
    flex-shrink: 0;
}

a.contact-item:hover {
    color: var(--accent-blue);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.06);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--navy);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--charcoal);
    background: var(--off-white);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    resize: vertical;
}

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: var(--white);
}

/* =====================================================
   Footer
   ===================================================== */
.footer {
    background: var(--navy-deep);
    padding: 80px 0 40px;
    color: var(--white);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 15px;
    max-width: 320px;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.9);
}

.footer-column a {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--white);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-location {
    font-size: 12px;
}

/* =====================================================
   Scroll Animations
   ===================================================== */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* =====================================================
   Responsive Design
   ===================================================== */
@media (max-width: 1024px) {
    .approach-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .mobile-menu {
        display: flex;
    }
    
    .hero-scroll {
        display: none;
    }
    
    .hero-content {
        padding: 140px 0 80px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .trust-badges {
        flex-direction: column;
        align-items: stretch;
    }
    
    .trust-badge {
        min-width: unset;
    }
    
    .tech-icons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-links {
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-ctas .btn {
        width: 100%;
        justify-content: center;
    }
    
    .value-cards {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 28px;
    }
}