/* ============================================================================
   Modern Styles - ScreenTech 2026
   Cloud Engineering & DevOps Solutions
   ============================================================================ */

/* CSS Variables - Design System */
:root {
    /* Colors - ScreenTech Blue Theme */
    --primary-color: #1E90FF;
    --primary-dark: #0066CC;
    --secondary-color: #4DA6FF;
    --accent-color: #87CEEB;

    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #718096;

    --bg-primary: #ffffff;
    --bg-secondary: #f0f8ff;
    --bg-dark: #003366;

    --success: #48bb78;
    --warning: #ed8936;
    --error: #f56565;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-heading: "Montserrat", "Segoe UI", "Helvetica Neue", Arial, sans-serif;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 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);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

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

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

html {
    font-size: 62.5%; /* 1rem = 10px */
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 1.6rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}

h1 { font-size: 4.8rem; font-weight: 900; }
h2 { font-size: 3.6rem; font-weight: 800; }
h3 { font-size: 2.4rem; font-weight: 700; }
h4 { font-size: 2rem; font-weight: 700; }

p {
    margin-bottom: var(--spacing-md);
}

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

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

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

/* ============================================================================
   Container & Layout
   ============================================================================ */

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

.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

/* ============================================================================
   Navigation
   ============================================================================ */

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.nav-brand h2 {
    font-size: 2.4rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.nav-brand .brand-text {
    font-size: 3.2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -1px;
    display: block;
}

.nav-brand img {
    height: 50px;
    width: auto;
    display: block;
}

.nav-brand a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    background-color: rgba(102, 126, 234, 0.1);
}

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

.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1E90FF 0%, #0066CC 100%);
    color: white;
    overflow: hidden;
}

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 5.6rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    line-height: 1.5;
}

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

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

.btn {
    display: inline-block;
    padding: 1.2rem 3rem;
    font-size: 1.6rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    color: var(--primary-color);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-primary-large {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.6rem 4rem;
    font-size: 1.8rem;
    box-shadow: var(--shadow-xl);
}

.btn-primary-large:hover {
    transform: translateY(-3px);
    box-shadow: 0 25px 35px -5px rgba(0, 0, 0, 0.2);
    color: white;
}

/* ============================================================================
   Technology Grid
   ============================================================================ */

.technologies {
    background-color: var(--bg-secondary);
}

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

.tech-card {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    box-shadow: var(--shadow-md);
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.tech-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 2rem;
}

.tech-card p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 1.4rem;
}

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

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

.service-card {
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.service-card:hover {
    transform: translateX(8px);
    background-color: white;
    box-shadow: var(--shadow-lg);
}

.service-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 1.5rem;
    line-height: 1.7;
    flex-grow: 1;
}

.service-card ul {
    flex-grow: 1;
    margin-bottom: var(--spacing-md);
}

.link-arrow {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.5rem;
    display: inline-block;
    margin-top: auto;
    padding-top: var(--spacing-sm);
}

.link-arrow:hover {
    transform: translateX(4px);
    display: inline-block;
}

/* ============================================================================
   CTA Section
   ============================================================================ */

.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.8rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-xl);
}

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

.footer {
    background-color: var(--bg-dark);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
    font-size: 1.4rem;
}

/* ============================================================================
   WhatsApp Float Button
   ============================================================================ */

.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: white;
    border-radius: 50%;
    text-align: center;
    font-size: 3.2rem;
    box-shadow: var(--shadow-xl);
    z-index: 999;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 25px 35px -5px rgba(37, 211, 102, 0.5);
    background-color: #20ba5a;
    color: white;
}

.whatsapp-float i {
    margin: 0;
}

/* ============================================================================
   Page Content (for About, Services, Contact pages)
   ============================================================================ */

.page-content {
    padding: var(--spacing-3xl) 0;
    max-width: 900px;
    margin: 0 auto;
}

.page-content h1 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-content h2 {
    color: var(--text-primary);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.page-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.7rem;
}

.page-content ul {
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.page-content li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
    html {
        font-size: 56.25%; /* 9px */
    }

    .hero-title {
        font-size: 4rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .navbar .container {
        flex-direction: column;
        text-align: center;
    }

    .tech-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: 60vh;
    }

    .section {
        padding: var(--spacing-xl) 0;
    }

    .whatsapp-float {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
        font-size: 2.6rem;
    }
}

/* ============================================================================
   Certifications
   ============================================================================ */

.certifications {
    background-color: var(--bg-secondary);
}

.badges-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    max-width: 900px;
    margin: 0 auto;
}

.cert-badge-simple {
    display: inline-block;
    padding: 1.2rem 2.4rem;
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    font-size: 1.4rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.cert-badge-simple:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }