/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #212529;
    background-color: #F8F9FA;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Color Variables */
:root {
    --primary-50: #E6F3FF;
    --primary-500: #0066CC;
    --primary-700: #0052A3;
    --primary-900: #003D7A;
    --neutral-0: #FFFFFF;
    --neutral-50: #F8F9FA;
    --neutral-100: #F1F3F4;
    --neutral-400: #6C757D;
    --neutral-900: #212529;
    --success: #28A745;
    --warning: #FFC107;
    --error: #DC3545;
    --accent: #0066CC;
    --accent-light: #1A75D6;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}

h1 {
    font-size: 2.5rem; /* 40px */
    line-height: 1.2;
}

h2 {
    font-size: 2rem; /* 32px */
    line-height: 1.3;
}

h3 {
    font-size: 1.25rem; /* 20px */
    font-weight: 600;
    line-height: 1.4;
}

p {
    margin-bottom: 16px;
    color: var(--neutral-400);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 52px;
    padding: 0 24px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 250ms ease-out;
    outline: none;
    min-width: 160px;
}

.btn-primary {
    background-color: var(--primary-500);
    color: var(--neutral-0);
}

.btn-primary:hover {
    background-color: var(--primary-700);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: scale(0.98);
}

/* Header */
.header {
    background-color: var(--neutral-0);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.nav {
    display: flex;
    gap: 24px;
}

.nav-link {
    color: var(--neutral-900);
    text-decoration: none;
    font-weight: 500;
    transition: color 200ms ease-out;
}

.nav-link:hover {
    color: var(--primary-500);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-50) 0%, #ffffff 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(33, 67, 166, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(33, 67, 166, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(33, 67, 166, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-eyebrow {
    color: var(--primary-500);
    font-size: 0.875rem; /* 14px */
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.hero-title {
    margin-bottom: 24px;
    color: var(--neutral-900);
}

.hero-subtitle {
    font-size: 1.125rem; /* 18px */
    color: var(--neutral-400);
    margin-bottom: 32px;
    line-height: 1.6;
}

/* Section Styles */
.case-studies {
    padding: 96px 0;
}

.appointment {
    background-color: var(--neutral-0);
    padding: 96px 0;
}

.cta-section {
    background-color: var(--primary-500);
    padding: 96px 0;
    text-align: center;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Filters */
.filters {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 48px;
    padding: 24px;
    background-color: var(--neutral-0);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-label {
    font-weight: 500;
    color: var(--neutral-900);
    font-size: 14px;
}

.filter-select {
    height: 44px;
    padding: 12px 16px;
    border: 1px solid #DEE2E6;
    border-radius: 8px;
    background-color: var(--neutral-0);
    color: var(--neutral-900);
    font-size: 16px;
    cursor: pointer;
    outline: none;
    transition: border-color 200ms ease-out;
}

.filter-select:focus {
    border-color: var(--primary-500);
}

/* Case Studies Grid */
.case-studies-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.case-study-card {
    background-color: var(--neutral-0);
    border-radius: 12px;
    padding: 32px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    transition: all 300ms cubic-bezier(0.25, 0.8, 0.25, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.case-study-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-light));
    transform: scaleX(0);
    transition: transform 300ms ease-out;
    transform-origin: left;
}

.case-study-card:hover {
    transform: translateY(-6px);
    border-color: rgba(33, 67, 166, 0.15);
    box-shadow: 0 12px 32px rgba(33, 67, 166, 0.15);
}

.case-study-card:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.industry-tag {
    background-color: var(--primary-50);
    color: var(--primary-500);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.client-name {
    color: var(--neutral-400);
    font-size: 14px;
    font-weight: 500;
}

.card-title {
    margin-bottom: 16px;
    color: var(--neutral-900);
    line-height: 1.4;
}

.card-description {
    color: var(--neutral-400);
    margin-bottom: 24px;
    line-height: 1.6;
}

.metrics {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.metric {
    text-align: left;
}

.metric-value {
    font-size: 1.5rem; /* 24px */
    font-weight: 700;
    color: var(--primary-500);
    line-height: 1;
}

.metric-label {
    font-size: 0.875rem; /* 14px */
    color: var(--neutral-400);
    margin-top: 4px;
}

.technologies {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tech-tag {
    background-color: var(--neutral-50);
    color: var(--neutral-900);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.card-cta {
    color: var(--primary-500);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color 200ms ease-out;
}

.card-cta:hover {
    color: var(--primary-700);
}

.results-count {
    text-align: center;
    color: var(--neutral-400);
    font-size: 14px;
}

/* Appointment Section */
.appointment-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: start;
}

.appointment-title {
    margin-bottom: 16px;
}

.appointment-description {
    font-size: 1.125rem;
    margin-bottom: 32px;
    line-height: 1.6;
}

.appointment-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.detail-item {
    color: var(--neutral-900);
}

.detail-item strong {
    color: var(--neutral-900);
}

.appointment-form-container {
    background-color: var(--neutral-0);
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.appointment-form-container iframe {
    border-radius: 8px;
    min-height: 500px;
    transition: box-shadow 200ms ease-out;
}

.appointment-form-container iframe:hover {
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.15);
}

.form-placeholder {
    text-align: center;
    padding: 48px 24px;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--neutral-50) 100%);
    border-radius: 8px;
    border: 2px dashed var(--primary-500);
}

.placeholder-content h3 {
    color: var(--primary-500);
    margin-bottom: 16px;
}

.placeholder-content p {
    margin-bottom: 16px;
    color: var(--neutral-900);
}

.placeholder-content ul {
    text-align: left;
    max-width: 400px;
    margin: 0 auto;
    color: var(--neutral-400);
}

.placeholder-content li {
    margin-bottom: 8px;
}



/* CTA Section */
.cta-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    color: var(--neutral-0);
    margin-bottom: 16px;
}

.cta-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: 32px;
}

.cta-section .btn-primary {
    background-color: var(--neutral-0);
    color: var(--primary-500);
}

.cta-section .btn-primary:hover {
    background-color: var(--neutral-50);
    color: var(--primary-700);
}

/* Footer */
.footer {
    background-color: var(--neutral-900);
    color: var(--neutral-0);
    padding: 64px 0 32px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.footer-logo .logo-img {
    height: 32px;
    margin-bottom: 16px;
}

.contact-info h4 {
    color: var(--neutral-0);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-item {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
    line-height: 1.5;
}

.contact-item strong {
    color: var(--neutral-0);
    font-weight: 600;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal-link {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color 200ms ease-out;
}

.footer-legal-link:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* Responsive Design */

/* Tablet (768px and up) */
@media (min-width: 768px) {
    .container {
        padding: 0 32px;
    }
    
    .hero {
        padding: 120px 0;
    }
    
    .hero-title {
        font-size: 3rem; /* 48px */
    }
    
    .filters {
        flex-direction: row;
        gap: 24px;
    }
    
    .filter-group {
        flex: 1;
    }
    
    .case-studies-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .metrics {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .appointment-content {
        grid-template-columns: 1fr 1fr;
        gap: 64px;
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        gap: 64px;
    }
    
    .footer-info {
        flex-direction: row;
        gap: 64px;
        align-items: flex-start;
    }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
    .case-studies-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .metrics {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .appointment-content {
        grid-template-columns: 1fr 1fr;
        gap: 80px;
    }
}

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {
    .hero-title {
        font-size: 3.5rem; /* 56px */
    }
}

/* Smooth Animations */
@media (prefers-reduced-motion: no-preference) {
    .case-study-card {
        animation: fadeInUp 0.6s ease-out;
    }
    
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* Focus States for Accessibility */
.btn:focus,
.nav-link:focus,
.filter-select:focus,
.card-cta:focus,
.footer-link:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .appointment,
    .cta-section {
        display: none;
    }
    
    .case-studies {
        padding: 0;
    }
    
    .case-study-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
        margin-bottom: 20px;
    }
}

/* Additional Visual Enhancements */

/* Hero Section Decorative Elements */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--primary-500), transparent);
    border-radius: 2px;
}

/* Section Dividers */
.section-header::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-light));
    margin: 24px auto 0;
    border-radius: 2px;
}

/* Enhanced Button Styles */
.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

/* Loading Animation for Cards */
.case-study-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.case-study-card:nth-child(1) { animation-delay: 0.1s; }
.case-study-card:nth-child(2) { animation-delay: 0.2s; }
.case-study-card:nth-child(3) { animation-delay: 0.3s; }
.case-study-card:nth-child(4) { animation-delay: 0.4s; }
.case-study-card:nth-child(5) { animation-delay: 0.5s; }
.case-study-card:nth-child(6) { animation-delay: 0.6s; }
.case-study-card:nth-child(7) { animation-delay: 0.7s; }
.case-study-card:nth-child(8) { animation-delay: 0.8s; }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Enhanced Hover Effects for Metrics */
.metric {
    transition: transform 0.2s ease;
}

.metric:hover {
    transform: scale(1.05);
}

.metric-value {
    transition: color 0.2s ease;
}

/* Background Pattern for Case Studies Section */
.case-studies {
    position: relative;
}

.case-studies::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(33, 67, 166, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(33, 67, 166, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

/* Enhanced Tech Tags */
.tech-tag {
    position: relative;
    transition: all 0.2s ease;
}

.tech-tag:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(33, 67, 166, 0.2);
}

/* Improved Results Count Styling */
.results-count {
    position: relative;
    font-weight: 500;
    color: var(--primary-500);
}

.results-count::before {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--primary-500);
    border-radius: 1px;
}

/* Enhanced Footer */
.footer {
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}