/* ============================================
   CSS Reset & Base Styles
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - Premium palette */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;

    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e2e8f0;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing - 8px grid */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --space-12: 96px;

    /* Layout */
    --container-max: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Transitions */
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
}

p {
    margin-bottom: var(--space-2);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ============================================
   Layout
   ============================================ */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-3);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
}

section {
    padding: var(--space-8) 0;
}

@media (min-width: 768px) {
    section {
        padding: var(--space-10) 0;
    }
}

@media (min-width: 1024px) {
    section {
        padding: var(--space-12) 0;
    }
}

/* Alternating backgrounds */
.services,
.inventory,
.faq {
    background: var(--color-bg-alt);
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow var(--transition-base);
}

.header.scrolled {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) 0;
    gap: var(--space-3);
}

.logo a {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    width: auto;
    display: block;
}

.logo a:hover {
    color: var(--color-primary);
    opacity: 0.8;
}

.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-1);
    z-index: 101;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-base);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.nav-links {
    display: none;
    list-style: none;
}

.nav-links li {
    margin-left: var(--space-3);
}

.nav-links a {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color var(--transition-base);
}

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

.nav .btn-primary {
    display: none;
}

/* Mobile menu */
@media (max-width: 1023px) {
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-3);
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active li {
        margin: 0;
        margin-bottom: var(--space-2);
    }
}

/* Desktop menu */
@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }

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

    .nav .btn-primary {
        display: inline-block;
    }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    white-space: nowrap;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    padding: var(--space-8) 0;
    text-align: center;
}

@media (min-width: 768px) {
    .hero {
        padding: var(--space-12) 0;
    }
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    margin-bottom: var(--space-3);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-light);
    margin-bottom: var(--space-4);
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    align-items: center;
}

@media (min-width: 640px) {
    .hero-cta {
        flex-direction: row;
        justify-content: center;
    }
}

.trust-line {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin: 0;
}

/* ============================================
   Services Grid
   ============================================ */

.services h2,
.inventory h2,
.process h2,
.compliance h2,
.about h2,
.faq h2,
.contact h2 {
    text-align: center;
    margin-bottom: var(--space-6);
}

.services-grid {
    display: grid;
    gap: var(--space-3);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-4);
    }
}

.service-card {
    background: var(--color-bg);
    padding: var(--space-4);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-slow);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--color-primary-light);
}

.service-icon {
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.service-card h3 {
    margin-bottom: var(--space-2);
}

.service-card p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    margin: 0;
    line-height: 1.5;
}

/* ============================================
   Process Timeline
   ============================================ */

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline-item {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    position: relative;
}

.timeline-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 23px;
    top: 56px;
    width: 2px;
    height: calc(100% + var(--space-3));
    background: var(--color-border);
}

.timeline-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.125rem;
}

.timeline-content h3 {
    margin-bottom: var(--space-1);
}

.timeline-content p {
    color: var(--color-text-light);
    margin: 0;
}

/* ============================================
   Inventory
   ============================================ */

.inventory-content {
    max-width: 800px;
    margin: 0 auto var(--space-4);
}

.inventory-group {
    margin-bottom: var(--space-4);
}

.inventory-group h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-2);
    text-align: center;
}

.chip-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
}

.chip {
    display: inline-block;
    padding: 8px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    transition: all var(--transition-base);
}

.chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.inventory-disclaimer {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.875rem;
    font-style: italic;
    margin: 0;
}

/* ============================================
   Compliance
   ============================================ */

.compliance-grid {
    display: grid;
    gap: var(--space-3);
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 640px) {
    .compliance-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .compliance-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.compliance-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--color-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.compliance-item svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.compliance-item span {
    font-size: 0.9375rem;
    color: var(--color-text);
}

/* ============================================
   About
   ============================================ */

.about-intro {
    max-width: 700px;
    margin: 0 auto var(--space-6);
    text-align: center;
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-text-light);
}

.why-choose {
    max-width: 800px;
    margin: 0 auto;
}

.why-choose h3 {
    text-align: center;
    margin-bottom: var(--space-4);
}

.benefits-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.benefits-list li {
    display: flex;
    gap: var(--space-2);
    align-items: flex-start;
}

.benefits-list svg {
    flex-shrink: 0;
    color: var(--color-primary);
    margin-top: 2px;
}

.benefits-list span {
    color: var(--color-text-light);
    line-height: 1.6;
}

.benefits-list strong {
    color: var(--color-text);
}

/* ============================================
   FAQ
   ============================================ */

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--space-2);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    transition: background var(--transition-base);
}

.faq-question:hover {
    background: var(--color-bg-alt);
}

.faq-question svg {
    flex-shrink: 0;
    transition: transform var(--transition-base);
    color: var(--color-text-light);
}

.faq-question[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-answer p {
    padding: 0 var(--space-3) var(--space-3);
    color: var(--color-text-light);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   Contact Form
   ============================================ */

.contact-intro {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--space-6);
}

.contact-wrapper {
    display: grid;
    gap: var(--space-6);
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .contact-wrapper {
        grid-template-columns: 2fr 1fr;
    }
}

.contact-form {
    background: var(--color-bg-alt);
    padding: var(--space-4);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: var(--space-3);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-1);
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

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

.checkbox-group {
    margin-bottom: var(--space-4);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    font-weight: 400;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-top: 2px;
    cursor: pointer;
}

.form-message {
    margin-top: var(--space-3);
    padding: var(--space-2);
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    display: none;
}

.form-message.success {
    display: block;
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.form-message.error {
    display: block;
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.contact-info h3 {
    margin-bottom: var(--space-3);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.contact-item a {
    word-break: break-all;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--color-text);
    color: var(--color-bg-alt);
    padding: var(--space-6) 0 var(--space-4);
}

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

.footer-about {
    margin-bottom: var(--space-4);
}

.footer-about h4 {
    font-size: 1rem;
    margin-bottom: var(--space-2);
    color: var(--color-bg);
}

.footer-about p {
    font-size: 0.9375rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-bg-alt);
    font-size: 0.9375rem;
    transition: opacity var(--transition-base);
}

.footer-links a:hover {
    opacity: 0.8;
    color: var(--color-bg);
}

.copyright {
    font-size: 0.875rem;
    margin-bottom: var(--space-2);
    opacity: 0.8;
}

.disclaimer {
    font-size: 0.8125rem;
    opacity: 0.6;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Utility Classes
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   Focus States (Accessibility)
   ============================================ */

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}
/* ============================================
   Additional Corporate Site Styles
   ============================================ */

/* Business Lines Section */
.business-lines {
    background: var(--color-bg);
}

.business-lines h2 {
    text-align: center;
    margin-bottom: var(--space-8);
}

.business-grid {
    display: grid;
    gap: var(--space-6);
    max-width: 900px;
    margin: 0 auto;
}

.business-card {
    background: var(--color-bg-alt);
    padding: var(--space-5);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    scroll-margin-top: 100px;
}

.business-icon {
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.business-card h3 {
    margin-bottom: var(--space-2);
    font-size: 1.5rem;
}

.business-intro {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.business-capabilities {
    margin-bottom: var(--space-4);
}

.business-capabilities h4,
.business-usecase h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.business-capabilities ul {
    list-style: none;
    padding: 0;
}

.business-capabilities li {
    padding-left: var(--space-3);
    margin-bottom: var(--space-1);
    position: relative;
    color: var(--color-text-light);
    line-height: 1.6;
}

.business-capabilities li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.business-usecase {
    margin-bottom: var(--space-4);
}

.business-usecase p {
    color: var(--color-text-light);
    font-style: italic;
    line-height: 1.6;
    padding: var(--space-3);
    background: var(--color-bg);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--border-radius);
    margin: 0;
}

.business-cta {
    margin-top: var(--space-4);
}

/* Trust Section */
.trust-section {
    margin-top: var(--space-6);
    margin-bottom: var(--space-6);
}

.trust-section h3 {
    text-align: center;
    margin-bottom: var(--space-4);
}

.trust-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .trust-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.trust-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
}

.trust-item svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.trust-item h4 {
    font-size: 1.125rem;
    margin: 0;
}

.trust-item p {
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.6;
}

/* Company Info */
.company-info {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.company-info h3 {
    text-align: center;
    margin-bottom: var(--space-4);
}

.info-grid {
    display: grid;
    gap: var(--space-3);
    grid-template-columns: 1fr;
    max-width: 700px;
    margin: 0 auto;
}

@media (min-width: 640px) {
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.info-item {
    padding: var(--space-3);
    background: var(--color-bg-alt);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    font-size: 0.9375rem;
}

.info-item strong {
    display: block;
    color: var(--color-text);
    margin-bottom: var(--space-1);
    font-weight: 600;
}

/* Responsive adjustments for business cards */
@media (max-width: 767px) {
    .business-card {
        padding: var(--space-4);
    }

    .business-card h3 {
        font-size: 1.25rem;
    }
}