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

/* CSS Variables for Theme System */
:root {
  --bg-primary: #fff;
  --bg-secondary: #f0f4f8;
  --bg-tertiary: #283c64;
  --bg-footer: #283c64;
  --bg-contact: linear-gradient(135deg, var(--bg-tertiary) 0%, #3b4d6b 100%);
  --bg-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --bg-services: #fff;
  --bg-service-card: #fdfdfe;

  --text-primary: #242830;
  --text-secondary: #6b7280;
  --text-light: #f9fafb;
  --text-accent: #2563eb;
  --text-service-card: #242830;

  --color-primary: #1f2937;
  --color-secondary: #2563eb;
  --color-accent: #1d4ed8;
  --color-error: #dc2626;

  --border-color: rgba(0,0,0,0.08);
  --shadow-color: rgba(0,0,0,0.08);

  --transition: all 0.3s ease;
}

/* Dark Theme Overrides */
.dark-theme {
  --bg-primary: #1a1a1a;
  --bg-secondary: #242424;
  --bg-tertiary: #0f0f0f;
  --bg-footer: #0f0f0f;
  --bg-contact: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
  --bg-hero: linear-gradient(135deg, #1a0f00 0%, #2c1810 100%);
  --bg-services: #1a1a1a;
  --bg-service-card: #2a2a2a;

  --text-primary: #f5f5f5;
  --text-secondary: #cccccc;
  --text-light: #f8f8f8;
  --text-accent: #6ec5ff;
  --text-service-card: #f5f5f5;

  --color-primary: #f5f5f5;
  --color-secondary: #6ec5ff;
  --color-accent: #6ec5ff;
  --color-error: #ff6b6b;

  --border-color: rgba(255,255,255,0.1);
  --shadow-color: rgba(0,0,0,0.2);
}

/* Apply variables */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    scroll-behavior: smooth;
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--color-primary);
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Navigation */
#navbar {
    position: fixed;
    width: 100%;
    background: var(--bg-primary);
    box-shadow: 0 2px 10px var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: rgba(0, 0, 0, 0.1);
}

.dark-theme .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.nav-logo h2 {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover {
    color: var(--color-secondary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    background: var(--color-secondary);
    transition: all 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
    left: 0;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: var(--bg-hero);
    color: #fff;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background: #fff;
    color: #667eea;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

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

.tech-icon {
    font-size: 8rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* About Section */
.about {
    background: var(--bg-secondary);
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.stat {
    text-align: center;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--border-color);
    transition: var(--transition);
}

.stat:hover {
    transform: translateY(-5px);
}

.stat h3 {
    font-size: 2rem;
    color: var(--color-secondary);
    margin-bottom: 10px;
}

/* Services Section */
.services {
    padding: 100px 0;
    background: var(--bg-services);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.service-card {
    background: var(--bg-service-card);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--border-color);
}

.service-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--color-secondary);
}

.service-card h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-service-card);
}

.service-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-card ul {
    list-style: none;
    text-align: left;
    padding-left: 0;
}

.service-card li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.service-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

/* Contact Section */
.contact {
    background: var(--bg-contact);
    color: var(--text-light);
    padding: 100px 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-form {
    background: rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.dark-theme .contact-form {
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(15px);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
}

.dark-theme .form-group input,
.dark-theme .form-group textarea {
    background: rgba(255,255,255,0.1);
    color: var(--text-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-button {
    width: 100%;
    padding: 15px;
    background: var(--color-secondary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-button:hover {
    background: var(--color-accent);
}

.contact-info {
    padding: 40px 0;
}

.info-item {
    margin-bottom: 30px;
}

.info-item h4 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--color-secondary);
}

.info-item p {
    font-size: 1rem;
    line-height: 1.6;
}

/* Footer */
footer {
    background: var(--bg-footer);
    color: var(--text-light);
    padding: 60px 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    color: var(--color-secondary);
    margin-bottom: 20px;
}

.footer-section h4 {
    margin-bottom: 20px;
    color: var(--text-light);
}

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

.footer-section li {
    margin-bottom: 10px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--color-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 50px;
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

    .tech-icon {
        font-size: 5rem;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }

    .about {
        padding: 60px 0;
    }

    .services,
    .contact {
        padding: 60px 0;
    }

    footer {
        padding: 40px 0;
    }

    .footer-bottom {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .section-header h2 {
        font-size: 1.8rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    body {
        font-size: 14px;
    }

    .container {
        padding: 0 15px;
    }

    .section {
        padding: 40px 0;
    }
}

/* Scroll Animations */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero > * {
    animation: slideUp 1s ease-out;
}

.about > * {
    animation: slideUp 1s ease-out 0.2s both;
}

.services > * {
    animation: slideUp 1s ease-out 0.4s both;
}

.contact > * {
    animation: slideUp 1s ease-out 0.6s both;
}