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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #0ea5e9;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* ===========================
   Navigation Bar
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
}

.nav-logo-icon {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
}

.nav-brand picture {
    display: flex;
}

.nav-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand-name {
    color: var(--primary-color);
    letter-spacing: 0.4px;
}

.brand-subtitle {
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--text-light);
    text-transform: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    margin-top: 70px;
    padding: 6rem 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-logo {
    width: 90px;
    height: 90px;
    margin: 0 auto 1.5rem auto;
    display: block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ===========================
   Sections
   =========================== */
.section {
    padding: 5rem 0;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* ===========================
   About Section
   =========================== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-content .highlight {
    background: #fef3c7;
    padding: 1.5rem;
    border-radius: 0.5rem;
    border-left: 4px solid #f59e0b;
    margin-top: 2rem;
    font-size: 1.1rem;
}

/* ===========================
   Services Grid
   =========================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===========================
   Demo Apps Section
   =========================== */
.demos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.demo-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.demo-card:hover {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.demo-placeholder {
    padding: 3rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.demo-placeholder h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.demo-placeholder p {
    color: var(--text-light);
}

/* Demo app card with actual content */
.demo-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 2rem;
    color: white;
}

.demo-header h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.demo-header p {
    opacity: 0.9;
    font-size: 0.95rem;
}

.demo-body {
    padding: 2rem;
}

.demo-body p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.demo-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.demo-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ===========================
   Technologies Grid
   =========================== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.tech-item {
    background: white;
    padding: 1.5rem;
    border-radius: 0.75rem;
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.tech-item:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

/* ===========================
   Contact Section
   =========================== */
.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-info {
    background: white;
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.contact-info h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.contact-detail {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 0.5rem;
}

.contact-detail strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-detail a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.1rem;
}

.contact-detail a:hover {
    text-decoration: underline;
}

.contact-cta {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #ecfdf5;
    border-radius: 0.5rem;
    border-left: 4px solid var(--success-color);
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 2.5rem 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.footer-logo {
    width: 48px;
    height: 48px;
    filter: brightness(0) invert(1);
}

.footer-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.footer-brand-name {
    font-weight: 700;
    letter-spacing: 0.4px;
}

.footer-brand-subtitle {
    color: #d1d5db;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.footer p {
    color: #9ca3af;
    margin: 0;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 0;
    }

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

    .nav-menu li {
        padding: 1rem 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-logo {
        width: 72px;
        height: 72px;
    }

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

    .contact-info {
        padding: 2rem;
    }

    .footer-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-brand {
        justify-content: center;
    }
}