/* ==========================================
   PAUL BUSINESS SOLUTIONS (PBS)
   Master Design System & Stylesheet v3.0 (Desktop & Mobile Refined)
========================================== */

:root {
    /* BRAND COLOR PALETTE */
    --primary: #0F172A;         /* Dark Slate Navy */
    --primary-light: #1E293B;   /* Slate Light Navy */
    --secondary: #2563EB;       /* Royal Blue */
    --secondary-hover: #1D4ED8; /* Darker Royal Blue */
    --accent: #14B8A6;          /* Teal Accent */
    --accent-light: #F0FDF4;    /* Soft Teal Highlight */
    --dark: #0F172A;            /* Dark Charcoal Text */
    --text: #334155;            /* Slate Body Text */
    --text-muted: #64748B;      /* Muted Slate Text */
    --bg-main: #F8FAFC;         /* Soft Off-White Background */
    --bg-white: #FFFFFF;        /* Pure White */
    --card-bg: #FFFFFF;        /* Card Background */
    --card-border: #E2E8F0;     /* Card Border */
    --card-hover-border: #93C5FD;/* Card Hover Border */
    
    /* SHADOW SYSTEM */
    --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.03);
    --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.08);
    --shadow-card: 0 12px 32px rgba(15, 23, 42, 0.07);
    --shadow-hover: 0 20px 40px rgba(37, 99, 235, 0.12);

    /* LAYOUT & RADII */
    --container: 1240px;
    --radius-sm: 10px;
    --radius: 18px;
    --radius-lg: 24px;
    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-main);
    color: var(--dark);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
    list-style: none;
}

/* CONTAINER */
.container {
    width: min(92%, var(--container));
    margin: 0 auto;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
    color: var(--primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    font-weight: 800;
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(2rem, 3.5vw, 2.6rem);
}

h3 {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
}

p {
    color: var(--text);
    font-size: 1.05rem;
}

.lead {
    font-size: 1.15rem;
    color: var(--text);
    line-height: 1.7;
}

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

.section-tag {
    display: inline-block;
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    background: #EFF6FF;
    padding: 4px 14px;
    border-radius: 999px;
}

.section-subtitle {
    max-width: 680px;
    margin: 16px auto 48px;
    color: var(--text-muted);
    font-size: 1.1rem;
    text-align: center;
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: var(--secondary);
    color: var(--bg-white);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
    background: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: #F1F5F9;
    border-color: #CBD5E1;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--secondary);
    border: 1px solid var(--secondary);
}

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

/* SECTIONS */
section {
    padding: 90px 0;
}

.section-light {
    background: var(--bg-white);
}

.section-dark {
    background: var(--primary);
    color: var(--bg-white);
}

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

.section-dark .section-subtitle {
    color: #94A3B8;
}

/* HEADER & NAVBAR */
header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar {
    height: 84px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 48px;
    width: auto;
}

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

.nav-link {
    font-weight: 500;
    font-size: 0.98rem;
    color: var(--text);
    position: relative;
    padding: 8px 4px;
}

.nav-link:hover, .nav-link.active {
    color: var(--secondary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--secondary);
    border-radius: 2px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary);
    cursor: pointer;
    padding: 8px;
}

/* MOBILE NAV DRAWER */
.mobile-nav {
    position: fixed;
    top: 84px;
    left: 0;
    width: 100%;
    height: calc(100vh - 84px);
    background: var(--bg-white);
    padding: 30px 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    z-index: 999;
    overflow-y: auto;
    border-top: 1px solid var(--card-border);
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav .nav-link {
    font-size: 1.2rem;
    font-weight: 600;
    padding: 12px 0;
    border-bottom: 1px solid var(--card-border);
}

/* HERO SECTION */
.hero {
    padding: 80px 0 100px;
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
    border-bottom: 1px solid var(--card-border);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    background: var(--accent-light);
    color: #0D9488;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 24px;
    border: 1px solid #CCFBF1;
}

.hero h1 {
    margin-bottom: 20px;
}

.hero p.lead {
    margin-bottom: 36px;
    max-width: 620px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* HERO DASHBOARD WIDGET (HIGH-CONTRAST VISIBLE CARD) */
.hero-widget {
    background: var(--bg-white);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow-card);
    position: relative;
}

.widget-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--card-border);
    margin-bottom: 24px;
}

.widget-title {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.live-dot {
    width: 10px;
    height: 10px;
    background: #22C55E;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 10px #22C55E;
}

.widget-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.widget-stat-card {
    background: var(--bg-main);
    border: 1px solid var(--card-border);
    padding: 20px 16px;
    border-radius: var(--radius-sm);
    text-align: left;
}

.widget-stat-card span {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.widget-stat-card strong {
    font-size: 1.75rem;
    color: var(--secondary);
    font-weight: 800;
}

.widget-activity {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.activity-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-main);
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
    font-size: 0.88rem;
    font-weight: 500;
}

.activity-item span.status {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
}

.status-success { background: #DCFCE7; color: #166534; }
.status-info { background: #DBEAFE; color: #1E40AF; }

/* TRUST SECTION GRID */
.trust-section {
    padding: 80px 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--card-border);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.trust-card {
    background: var(--bg-white);
    border: 1px solid var(--card-border);
    padding: 32px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.trust-card:hover {
    transform: translateY(-4px);
    border-color: var(--secondary);
    box-shadow: var(--shadow-card);
}

.trust-card i {
    font-size: 2.2rem;
    color: var(--secondary);
    margin-bottom: 16px;
    display: inline-block;
}

.trust-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.trust-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
}

/* INDUSTRIES SECTION GRID */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.industry-card {
    background: var(--bg-white);
    border: 1px solid var(--card-border);
    padding: 36px 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.industry-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--secondary);
}

.industry-icon {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    background: #EFF6FF;
    color: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 24px;
}

.industry-card h3 {
    margin-bottom: 12px;
}

.industry-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 24px;
    flex-grow: 1;
}

.industry-link {
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.industry-link:hover {
    gap: 10px;
}

/* SERVICES GRID */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-white);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--secondary);
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--primary);
    color: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 24px;
}

.service-card h3 {
    margin-bottom: 14px;
}

.service-card p {
    color: var(--text);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.service-deliverables {
    margin: 16px 0 24px;
    padding-top: 16px;
    border-top: 1px solid var(--card-border);
}

.service-deliverables li {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.service-deliverables i {
    color: var(--accent);
}

/* CASE STUDY CARD ENGINE */
.case-study-hero {
    background: var(--primary);
    color: var(--bg-white);
    padding: 90px 0;
}

.case-study-card {
    background: var(--bg-white);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    margin-bottom: 60px;
}

.case-study-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.case-study-content {
    padding: 48px;
}

.case-study-media {
    background: var(--bg-main);
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-left: 1px solid var(--card-border);
}

.meta-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.meta-tag {
    padding: 4px 14px;
    border-radius: 999px;
    background: #EFF6FF;
    color: var(--secondary);
    font-size: 0.8rem;
    font-weight: 700;
}

.case-results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 28px 0;
    text-align: center;
}

.case-result-item {
    background: var(--bg-white);
    padding: 18px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
}

.case-result-item strong {
    font-size: 1.5rem;
    color: var(--secondary);
    display: block;
}

.case-result-item span {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* TESTIMONIALS SECTION */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.testimonial-card {
    background: var(--bg-white);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 36px 30px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.testimonial-stars {
    color: #F59E0B;
    font-size: 1.1rem;
    margin-bottom: 16px;
}

.testimonial-text {
    font-style: italic;
    color: var(--text);
    margin-bottom: 24px;
    font-size: 0.95rem;
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.avatar-placeholder {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.author-info h4 {
    font-size: 0.95rem;
}

.author-info p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* TIMELINE */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0;
    padding-left: 30px;
    border-left: 2px solid var(--card-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -37px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--secondary);
    border: 2px solid var(--bg-white);
}

.timeline-year {
    font-weight: 700;
    color: var(--secondary);
    font-size: 0.9rem;
}

/* CONTACT PAGE GRID */
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
}

.contact-card {
    background: var(--bg-white);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow-card);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 8px;
    color: var(--primary);
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    background: var(--bg-main);
    color: var(--dark);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    background: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-info-item i {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: #EFF6FF;
    color: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* ACCORDION */
.accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    background: var(--bg-white);
    overflow: hidden;
}

.accordion-header {
    padding: 20px 24px;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.accordion-body {
    padding: 0 24px 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
    display: none;
}

.accordion-item.active .accordion-body {
    display: block;
}

.accordion-item.active .accordion-header i {
    transform: rotate(180deg);
}

/* FOOTER */
.footer {
    background: var(--primary);
    color: #94A3B8;
    padding: 80px 0 0;
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    height: 44px;
    width: auto;
    margin-bottom: 20px;
}

.footer h4 {
    color: var(--bg-white);
    margin-bottom: 20px;
    font-size: 1rem;
}

.footer ul li {
    margin-bottom: 12px;
}

.footer a {
    color: #94A3B8;
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
}

/* RESPONSIVE BREAKPOINTS (DESKTOP & MOBILE FINE-TUNING) */
@media (max-width: 1200px) {
    .trust-grid, .industries-grid, .services-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .hero-grid, .case-study-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .nav-menu {
        gap: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

    .trust-grid, .industries-grid, .services-grid, .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: 50px 0;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .case-study-media {
        border-left: none;
        border-top: 1px solid var(--card-border);
    }

    .case-results-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}