/*
 * Vectrus Supply Chain - Stylesheet
 * Enterprise SaaS Design (Infios-inspired)
 * Clean, Modern, Professional
 */

/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
    /* Primary - Deep Blue/Purple */
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #eef2ff;
    --primary-glow: rgba(79, 70, 229, 0.1);
    
    /* Accent - Vibrant Teal */
    --accent: #14b8a6;
    --accent-dark: #0d9488;
    --accent-light: #ccfbf1;
    
    /* Secondary - Orange */
    --secondary: #f97316;
    
    /* Neutrals */
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    
    --white: #ffffff;
    --black: #000000;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --sp-1: 0.25rem;
    --sp-2: 0.5rem;
    --sp-3: 0.75rem;
    --sp-4: 1rem;
    --sp-5: 1.25rem;
    --sp-6: 1.5rem;
    --sp-8: 2rem;
    --sp-10: 2.5rem;
    --sp-12: 3rem;
    --sp-16: 4rem;
    --sp-20: 5rem;
    --sp-24: 6rem;
    --sp-32: 8rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 60px rgba(79, 70, 229, 0.15);
    
    /* Transitions */
    --trans: 0.2s ease;
    --trans-slow: 0.4s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--trans); }
a:hover { color: var(--primary-dark); }

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
}

h1 { font-size: 3.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2.5rem; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }

ul { list-style: none; }

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: var(--sp-3) var(--sp-6);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--trans);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    box-shadow: inset 0 0 0 2px var(--primary);
}

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

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

.btn-white:hover {
    background: var(--gray-100);
    color: var(--primary-dark);
}

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

.btn-accent:hover {
    background: var(--accent-dark);
    color: var(--white);
}

.btn-lg {
    padding: var(--sp-4) var(--sp-8);
    font-size: 1rem;
}

.btn-sm {
    padding: var(--sp-2) var(--sp-4);
    font-size: 0.875rem;
}

/* ============================================
   Header - Clean Top Bar
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--white);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 800;
    font-size: 1.25rem;
}

.logo-text {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.nav-main {
    display: flex;
    align-items: center;
    gap: var(--sp-8);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--sp-1);
}

.nav-link {
    color: var(--gray-600);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: var(--sp-2) var(--sp-4);
    border-radius: var(--radius-md);
    transition: var(--trans);
}

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

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

/* Dropdown */
.nav-dropdown { position: relative; }
.dropdown-arrow { 
    font-size: 0.6rem; 
    margin-left: var(--sp-1); 
    transition: var(--trans);
    opacity: 0.6;
}
.nav-dropdown:hover .dropdown-arrow { transform: rotate(180deg); }

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--sp-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--trans);
    border: 1px solid var(--gray-200);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-3) var(--sp-4);
    color: var(--gray-600);
    font-size: 0.9375rem;
    border-radius: var(--radius-md);
    transition: var(--trans);
}

.dropdown-menu a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.dropdown-menu a i {
    width: 20px;
    color: var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--sp-2);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: var(--trans);
}

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
}

/* ============================================
   Hero - Clean with Visual
   ============================================ */
.hero {
    padding: var(--sp-20) 0 var(--sp-24);
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-16);
    align-items: center;
}

.hero-content {
    max-width: 560px;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    padding: var(--sp-2) var(--sp-4);
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--sp-6);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: var(--sp-6);
}

.hero-title .gradient {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--sp-8);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--sp-4);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
}

.hero-visual img {
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-glow);
}

.hero-visual::before {
    content: '';
    position: absolute;
    top: -30px;
    right: -30px;
    width: 60%;
    height: 60%;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    border-radius: var(--radius-2xl);
    z-index: -1;
}

/* ============================================
   Stats Section
   ============================================ */
.stats-section {
    padding: var(--sp-16) 0;
    background: var(--gray-900);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-8);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: var(--sp-2);
}

.stat-label {
    color: var(--gray-400);
    font-size: 0.9375rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--sp-20) 0;
}

.section-gray {
    background: var(--gray-50);
}

.section-dark {
    background: var(--gray-900);
    color: var(--white);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
    color: var(--white);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--sp-12);
}

.section-eyebrow {
    display: inline-block;
    color: var(--primary);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--sp-4);
}

.section-title {
    margin-bottom: var(--sp-4);
}

.section-desc {
    color: var(--gray-500);
    font-size: 1.0625rem;
}

/* ============================================
   Solutions Cards
   ============================================ */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-6);
}

.solution-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--sp-8);
    transition: var(--trans);
    text-decoration: none;
    display: block;
}

.solution-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.solution-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: var(--sp-5);
}

.solution-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--sp-3);
    color: var(--gray-900);
}

.solution-card p {
    color: var(--gray-500);
    font-size: 0.9375rem;
    margin-bottom: var(--sp-4);
}

.solution-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
}

.solution-card:hover .solution-link {
    gap: var(--sp-3);
}

/* ============================================
   Features Split
   ============================================ */
.features-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-16);
    align-items: center;
}

.features-split.reverse {
    direction: rtl;
}

.features-split.reverse > * {
    direction: ltr;
}

.features-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.features-content {
    max-width: 520px;
}

.features-list {
    margin-top: var(--sp-8);
}

.feature-item {
    display: flex;
    gap: var(--sp-4);
    margin-bottom: var(--sp-6);
}

.feature-check {
    width: 24px;
    height: 24px;
    background: var(--accent-light);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-item h4 {
    margin-bottom: var(--sp-1);
}

.feature-item p {
    color: var(--gray-500);
    font-size: 0.9375rem;
}

/* ============================================
   Customers/Case Studies
   ============================================ */
.customers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-6);
}

.customer-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--sp-6);
    transition: var(--trans);
}

.customer-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.customer-logo {
    height: 40px;
    margin-bottom: var(--sp-4);
    display: flex;
    align-items: center;
}

.customer-logo img {
    max-height: 100%;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: var(--trans);
}

.customer-card:hover .customer-logo img {
    filter: grayscale(0%);
    opacity: 1;
}

.customer-card h4 {
    font-size: 1rem;
    margin-bottom: var(--sp-2);
}

.customer-card p {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ============================================
   News Cards
   ============================================ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-6);
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--trans);
    text-decoration: none;
    display: block;
}

.news-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.news-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-card-content {
    padding: var(--sp-6);
}

.news-tag {
    display: inline-block;
    padding: var(--sp-1) var(--sp-3);
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--sp-3);
}

.news-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--sp-2);
    color: var(--gray-900);
}

.news-card p {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    padding: var(--sp-20) 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    text-align: center;
    color: var(--white);
}

.cta-section h2 {
    color: var(--white);
    margin-bottom: var(--sp-4);
}

.cta-section p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--sp-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--sp-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Page Hero
   ============================================ */
.page-hero {
    padding: var(--sp-16) 0;
    background: var(--gray-50);
    text-align: center;
}

.page-hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--sp-4);
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--sp-2);
    color: var(--gray-500);
    font-size: 0.875rem;
}

.breadcrumb a { color: var(--primary); }

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: var(--sp-16) 0 var(--sp-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--sp-12);
    margin-bottom: var(--sp-12);
}

.footer-brand p {
    margin-top: var(--sp-4);
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
}

.footer-logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 800;
}

.footer-logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--white);
}

.footer h4 {
    color: var(--white);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--sp-5);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
}

.footer-links a {
    color: var(--gray-400);
    font-size: 0.9375rem;
    transition: var(--trans);
}

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

.footer-bottom {
    padding-top: var(--sp-8);
    border-top: 1px solid var(--gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: var(--sp-6);
}

.footer-legal a {
    color: var(--gray-400);
}

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

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: var(--sp-5);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--sp-2);
}

.form-label.required::after {
    content: '*';
    color: var(--secondary);
    margin-left: var(--sp-1);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--sp-3) var(--sp-4);
    font-size: 0.9375rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    background: var(--white);
    transition: var(--trans);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4);
}

.honeypot { display: none; }

.alert {
    padding: var(--sp-4) var(--sp-6);
    border-radius: var(--radius-md);
    margin-bottom: var(--sp-6);
}

.alert-success {
    background: var(--accent-light);
    color: var(--accent-dark);
    border: 1px solid var(--accent);
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .hero-grid,
    .features-split,
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--sp-10);
    }
    
    .solutions-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .customers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--sp-6);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
}

@media (max-width: 768px) {
    .nav-main {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: var(--sp-16) var(--sp-6);
        box-shadow: var(--shadow-xl);
        transition: right var(--trans-slow);
    }
    
    .nav-main.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: var(--sp-4);
        border-bottom: 1px solid var(--gray-200);
        border-radius: 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: var(--gray-50);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--trans-slow);
        padding: 0;
    }
    
    .nav-dropdown.open .dropdown-menu {
        max-height: 400px;
        padding: var(--sp-2);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-overlay.active {
        display: block;
    }
    
    .solutions-grid,
    .news-grid,
    .customers-grid,
    .stats-grid,
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--sp-4);
        text-align: center;
    }
}