/* ============================================================================
   GuardrailsERP – Premium Corporate Website
   Dark navy, muted accents, enterprise consulting aesthetic
   ============================================================================ */

/* CSS Custom Properties */
:root {
    /* Colors */
    --color-navy: #1a2332;
    --color-graphite: #2c3e50;
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-grey-light: #e8eaed;
    --color-grey-medium: #b0b7c3;
    --color-grey-dark: #6b7684;
    --color-cyan-muted: #4a9ead;
    --color-cyan-light: #7bb8cc;
    --color-green-muted: #5a8f6f;
    --color-green-light: #7ba88e;
    --color-accent: #4a9ead;

    /* Typography */
    --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    --font-family-serif: 'Georgia', 'Garamond', serif;
    
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    --line-height-base: 1.6;
    --line-height-tight: 1.4;
    --line-height-relaxed: 1.8;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-3xl: 64px;

    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-normal: 300ms ease-out;
    --transition-slow: 500ms ease-out;

    /* Breakpoints */
    --bp-mobile: 480px;
    --bp-tablet: 768px;
    --bp-desktop: 1024px;
    --bp-wide: 1200px;
}

/* ============================================================================
   Reset and Base Styles
   ============================================================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-graphite);
    background-color: var(--color-white);
}

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

a:hover,
a:focus {
    color: var(--color-cyan-light);
}

button {
    font-family: inherit;
    cursor: pointer;
}

/* ============================================================================
   Container and Layout
   ============================================================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================================================
   Header and Navigation
   ============================================================================ */

.header {
    background-color: var(--color-navy);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.logo {
    flex-shrink: 0;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    flex: 1;
    margin-left: var(--spacing-3xl);
}

.nav-link {
    color: var(--color-white);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-cyan-light);
    outline: none;
}

.cta-button-header {
    margin-left: auto;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    color: var(--color-white);
    width: 24px;
    height: 20px;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    display: block;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-normal);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
        margin-left: var(--spacing-md);
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .nav-menu {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: var(--spacing-md);
        background-color: rgba(26, 35, 50, 0.98);
        padding: var(--spacing-lg);
        margin-left: 0;
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .cta-button-header {
        display: none;
    }

    .nav-link {
        font-size: 16px;
    }
}

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

.cta-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    text-align: center;
    cursor: pointer;
}

.cta-button-primary {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.cta-button-primary:hover,
.cta-button-primary:focus {
    background-color: var(--color-cyan-light);
    box-shadow: 0 4px 16px rgba(74, 158, 173, 0.25);
    outline: none;
}

.cta-button-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.cta-button-secondary:hover,
.cta-button-secondary:focus {
    background-color: var(--color-accent);
    color: var(--color-white);
    outline: none;
}

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

.hero {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-graphite) 100%);
    color: var(--color-white);
    padding: var(--spacing-3xl) var(--spacing-lg);
    text-align: center;
}

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

.hero-headline {
    font-size: 48px;
    font-weight: 700;
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}

.hero-tagline {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-cyan-light);
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.5px;
}

.hero-description {
    font-size: 18px;
    line-height: var(--line-height-relaxed);
    color: var(--color-grey-light);
    margin-bottom: var(--spacing-xl);
}

.hero-trust-statement {
    background-color: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--color-cyan-light);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border-radius: 2px;
}

.hero-trust-statement p {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-grey-light);
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .hero-headline {
        font-size: 32px;
    }

    .hero-tagline {
        font-size: 18px;
    }

    .hero-description {
        font-size: 16px;
    }

    .hero-ctas {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .cta-button {
        width: 100%;
    }
}

/* ============================================================================
   Credibility Strip
   ============================================================================ */

.credibility-strip {
    background-color: var(--color-off-white);
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.credibility-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.credibility-item h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.credibility-item p {
    font-size: 14px;
    line-height: var(--line-height-relaxed);
    color: var(--color-grey-dark);
}

@media (max-width: 768px) {
    .credibility-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* ============================================================================
   Section Base Styles
   ============================================================================ */

main section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xxl);
    text-align: center;
    letter-spacing: -0.5px;
}

@media (max-width: 768px) {
    main section {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .section-title {
        font-size: 28px;
        margin-bottom: var(--spacing-xl);
    }
}

/* ============================================================================
   Why GuardrailsERP Section
   ============================================================================ */

.section-why {
    background-color: var(--color-white);
}

.why-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
}

.why-intro {
    font-size: 16px;
    line-height: var(--line-height-relaxed);
    color: var(--color-graphite);
    margin-bottom: var(--spacing-lg);
}

.why-list {
    list-style: none;
    padding-left: 0;
}

.why-list li {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    position: relative;
    font-size: 15px;
    line-height: var(--line-height-relaxed);
    color: var(--color-grey-dark);
}

.why-list li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.why-value {
    font-size: 16px;
    line-height: var(--line-height-relaxed);
    color: var(--color-graphite);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
}

.why-value:last-child {
    padding-bottom: 0;
}

@media (max-width: 768px) {
    .why-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* ============================================================================
   Services Section
   ============================================================================ */

.section-services {
    background-color: var(--color-off-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 6px;
    border-left: 4px solid var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: all var(--transition-normal);
}

.service-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.service-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
}

.service-card p {
    font-size: 15px;
    line-height: var(--line-height-relaxed);
    color: var(--color-grey-dark);
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   When to Engage Section
   ============================================================================ */

.section-when {
    background-color: var(--color-white);
}

.when-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.when-item {
    padding: var(--spacing-lg);
    background-color: var(--color-off-white);
    border-radius: 4px;
    border-top: 3px solid var(--color-green-muted);
}

.when-item h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.when-item p {
    font-size: 14px;
    line-height: var(--line-height-relaxed);
    color: var(--color-grey-dark);
}

@media (max-width: 768px) {
    .when-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   Experience Section
   ============================================================================ */

.section-experience {
    background-color: var(--color-off-white);
}

.experience-intro {
    font-size: 16px;
    line-height: var(--line-height-relaxed);
    color: var(--color-graphite);
    max-width: 800px;
    margin: 0 auto var(--spacing-xxl);
    text-align: center;
}

.experience-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.highlight-block {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.highlight-block h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.highlight-block p {
    font-size: 14px;
    line-height: var(--line-height-relaxed);
    color: var(--color-grey-dark);
}

.experience-summary {
    font-size: 16px;
    line-height: var(--line-height-relaxed);
    color: var(--color-graphite);
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-xl);
    background-color: rgba(74, 158, 173, 0.05);
    border-left: 3px solid var(--color-accent);
    border-radius: 2px;
}

@media (max-width: 768px) {
    .experience-highlights {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   Client-First Section
   ============================================================================ */

.section-client-first {
    background: linear-gradient(135deg, rgba(74, 158, 173, 0.08) 0%, rgba(90, 143, 111, 0.08) 100%);
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.client-first-content {
    max-width: 700px;
    margin: 0 auto;
}

.client-first-message {
    font-size: 18px;
    line-height: var(--line-height-relaxed);
    color: var(--color-graphite);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.client-first-message:last-child {
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .client-first-message {
        font-size: 16px;
    }
}

/* ============================================================================
   Register Interest Section
   ============================================================================ */

.section-register {
    background-color: var(--color-white);
}

.register-content {
    max-width: 600px;
    margin: 0 auto;
}

.register-intro {
    font-size: 16px;
    line-height: var(--line-height-relaxed);
    color: var(--color-graphite);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.register-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

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

.form-group label span {
    color: var(--color-accent);
    margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 1px solid var(--color-grey-light);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    transition: all var(--transition-normal);
    background-color: var(--color-white);
    color: var(--color-graphite);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(74, 158, 173, 0.1);
}

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

.form-message {
    padding: var(--spacing-lg);
    background-color: var(--color-off-white);
    border-left: 4px solid var(--color-green-muted);
    border-radius: 2px;
    text-align: center;
    font-size: 15px;
    line-height: var(--line-height-relaxed);
    color: var(--color-graphite);
    animation: slideIn var(--transition-normal);
}

.form-message.hidden {
    display: none;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.footer {
    background-color: var(--color-navy);
    color: var(--color-white);
    padding: var(--spacing-xxl) var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
    align-items: start;
}

.footer-brand h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-cyan-light);
    letter-spacing: 0.5px;
}

.footer-contact a {
    color: var(--color-cyan-light);
}

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

.footer-copyright {
    font-size: 12px;
    color: var(--color-grey-medium);
    text-align: right;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-copyright {
        text-align: left;
    }
}

/* ============================================================================
   Print Styles
   ============================================================================ */

@media print {
    .header,
    .mobile-menu-toggle,
    .section-register {
        display: none;
    }
}