/* ===== CSS Variables ===== */
:root {
    --orange-500: #f97316;
    --orange-600: #ea580c;
    --orange-700: #c2410c;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--orange-500), var(--orange-700));
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
    background: var(--white);
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Navbar ===== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200); padding: 16px 0;
}
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; }
.nav-logo { height: 32px; width: auto; }
.nav-menu { display: flex; gap: 32px; align-items: center; }
.nav-menu a { font-weight: 500; color: var(--gray-600); transition: color 0.2s; }
.nav-menu a:hover { color: var(--orange-500); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--gray-700); transition: 0.3s; border-radius: 2px; }
.nav-toggle:hover span { background: var(--orange-500); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Buttons ===== */
.btn {
    display: inline-block; padding: 12px 24px; border-radius: 8px;
    font-weight: 600; font-size: 14px; transition: all 0.2s; cursor: pointer; border: none;
}
.btn-primary { background: var(--gradient); color: var(--white); box-shadow: 0 4px 14px rgba(249,115,22,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(249,115,22,0.4); }
.btn-secondary { background: var(--gray-100); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-200); }
.btn-nav { padding: 10px 20px; }
.btn-large { padding: 16px 32px; font-size: 16px; }

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gray-900);
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(249,115,22,0.12) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 20%, rgba(251,191,36,0.08) 0%, transparent 50%),
        linear-gradient(180deg, var(--gray-900) 0%, #1a1f2e 50%, var(--gray-800) 100%);
    pointer-events: none;
}
.hero-gradient {
    position: absolute;
    top: 10%;
    right: -10%;
    width: 50%;
    height: 80%;
    background: radial-gradient(ellipse at center, rgba(249,115,22,0.08) 0%, transparent 70%);
    pointer-events: none;
    filter: blur(40px);
}
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-badge {
    display: inline-block; background: rgba(249,115,22,0.2); color: var(--orange-500);
    padding: 8px 16px; border-radius: 50px; font-size: 14px; font-weight: 500; margin-bottom: 24px;
}
.hero h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; color: var(--white); line-height: 1.1; margin-bottom: 24px; }
.highlight { color: var(--orange-500); }
.hero-subtitle { font-size: 1.25rem; color: var(--gray-400); margin-bottom: 32px; max-width: 600px; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 48px; }
.stat { display: flex; flex-direction: column; }
.stat-number { font-size: 1.5rem; font-weight: 700; color: var(--white); }
.stat-label { font-size: 0.875rem; color: var(--gray-500); }

/* ===== USP Banner ===== */
.usp-banner { background: var(--orange-500); padding: 24px 0; }
.usp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.usp-item {
    display: flex; align-items: center; justify-content: center; gap: 12px;
    color: var(--white); font-weight: 500; font-size: 14px;
}
.usp-icon { font-size: 20px; }

/* ===== Sections ===== */
.section { padding: 100px 0; }
.section-dark { background: var(--gray-50); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 2.5rem; font-weight: 700; color: var(--gray-800); margin-bottom: 16px; }
.section-header p { font-size: 1.125rem; color: var(--gray-500); }

/* ===== Services Grid ===== */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.service-card {
    background: var(--white); border: 1px solid var(--gray-200); border-radius: 16px;
    padding: 32px; transition: all 0.3s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.08); border-color: var(--orange-500); }
.service-icon { font-size: 40px; margin-bottom: 20px; }
.service-card h3 { font-size: 1.25rem; color: var(--gray-800); margin-bottom: 12px; }
.service-card p { color: var(--gray-600); margin-bottom: 16px; font-size: 0.95rem; }
.service-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.service-tags li {
    background: var(--gray-100); color: var(--gray-600); padding: 4px 12px;
    border-radius: 20px; font-size: 12px; font-weight: 500;
}

/* ===== Tech Categories ===== */
.tech-categories { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 32px; }
.tech-category h4 { color: var(--gray-800); margin-bottom: 16px; font-size: 1rem; }
.tech-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tech-tag {
    background: var(--white); border: 1px solid var(--gray-200); color: var(--gray-700);
    padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 500; transition: all 0.2s;
}
.tech-tag:hover { border-color: var(--orange-500); color: var(--orange-500); }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-content h2 { font-size: 2.5rem; font-weight: 700; color: var(--gray-800); margin-bottom: 24px; }
.about-lead { font-size: 1.125rem; color: var(--gray-700); margin-bottom: 16px; font-weight: 500; }
.about-content p { margin-bottom: 16px; color: var(--gray-600); }
.about-content .btn { margin-top: 16px; }
.about-image { display: flex; justify-content: center; }
.about-logo {
    width: 280px;
    height: 280px;
}

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info { display: flex; flex-direction: column; gap: 32px; }
.contact-item { display: flex; gap: 20px; align-items: flex-start; }
.contact-icon { font-size: 28px; }
.contact-item h4 { color: var(--gray-800); margin-bottom: 4px; }
.contact-item a, .contact-item p { color: var(--gray-600); font-size: 1rem; }
.contact-item a:hover { color: var(--orange-500); }
.cta-card {
    background: var(--white); border-radius: 16px; padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08); text-align: center;
}
.cta-card h3 { font-size: 1.5rem; color: var(--gray-800); margin-bottom: 16px; }
.cta-card p { color: var(--gray-600); margin-bottom: 24px; }

/* ===== Footer ===== */
.footer { background: var(--gray-900); color: var(--gray-400); padding: 48px 0 24px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; padding-bottom: 24px; border-bottom: 1px solid var(--gray-700); }
.footer-brand { display: flex; align-items: center; }
.footer-logo { height: 40px; width: auto; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: var(--orange-500); }
.footer-bottom { padding-top: 24px; text-align: center; font-size: 14px; }

/* ===== Modal ===== */
.modal {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6); z-index: 2000; align-items: center; justify-content: center;
}
.modal.active { display: flex; }
.modal-content {
    background: var(--white); border-radius: 16px; padding: 40px; max-width: 500px;
    width: 90%; max-height: 80vh; overflow-y: auto; position: relative;
}
.modal-close {
    position: absolute; top: 16px; right: 20px; font-size: 28px;
    background: none; border: none; cursor: pointer; color: var(--gray-500);
}
.modal-content h2 { color: var(--gray-800); margin-bottom: 24px; }
.modal-content h3 { color: var(--gray-700); font-size: 1rem; margin: 20px 0 8px; }
.modal-content p { color: var(--gray-600); }

/* ===== Responsive - Tablet ===== */
@media (max-width: 1024px) {
    .container { padding: 0 20px; }
    .hero h1 { font-size: 2.8rem; }
    .section { padding: 80px 0; }
    .section-header h2 { font-size: 2rem; }
    .about-grid { gap: 40px; }
    .tech-categories { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; }
}

/* ===== Responsive - Mobile ===== */
@media (max-width: 768px) {
    /* Navigation */
    .nav-toggle { display: flex; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    }
    .nav-menu.active { display: flex; }
    .nav-menu a { font-size: 16px; }
    .btn-nav { text-align: center; }

    /* Hero */
    .hero { padding: 100px 0 60px; min-height: auto; }
    .hero h1 { font-size: 2rem; line-height: 1.2; }
    .hero-subtitle { font-size: 1rem; }
    .hero-badge { font-size: 12px; padding: 6px 12px; }
    .hero-buttons { flex-direction: column; gap: 12px; }
    .hero-buttons .btn { width: 100%; text-align: center; }
    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 24px;
        justify-content: flex-start;
    }
    .stat { min-width: 80px; }
    .stat-number { font-size: 1.25rem; }

    /* USP Banner */
    .usp-banner { padding: 20px 0; }
    .usp-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .usp-item {
        font-size: 12px;
        flex-direction: column;
        text-align: center;
        gap: 6px;
    }
    .usp-icon { font-size: 24px; }

    /* Sections */
    .section { padding: 60px 0; }
    .section-header { margin-bottom: 40px; }
    .section-header h2 { font-size: 1.75rem; }
    .section-header p { font-size: 1rem; }

    /* Services */
    .services-grid { grid-template-columns: 1fr; gap: 16px; }
    .service-card { padding: 24px; }
    .service-icon { font-size: 32px; margin-bottom: 16px; }
    .service-card h3 { font-size: 1.1rem; }

    /* Tech */
    .tech-categories { grid-template-columns: 1fr 1fr; gap: 20px; }
    .tech-category h4 { font-size: 0.9rem; margin-bottom: 12px; }
    .tech-tag { padding: 6px 12px; font-size: 12px; }

    /* About */
    .about-grid { grid-template-columns: 1fr; gap: 32px; }
    .about-image { order: -1; }
    .about-logo { width: 200px; height: 200px; }
    .about-content h2 { font-size: 1.75rem; }
    .about-lead { font-size: 1rem; }

    /* Contact */
    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .contact-info { gap: 24px; }
    .contact-item { gap: 16px; }
    .contact-icon { font-size: 24px; }
    .cta-card { padding: 32px 24px; }
    .cta-card h3 { font-size: 1.25rem; }

    /* Footer */
    .footer { padding: 40px 0 20px; }
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    .footer-links { justify-content: center; }

    /* Modal */
    .modal-content { padding: 32px 24px; margin: 20px; }
}

/* ===== Responsive - Small Mobile ===== */
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 1.75rem; }
    .hero-stats { gap: 16px; }
    .usp-grid { grid-template-columns: 1fr; gap: 12px; }
    .usp-item { flex-direction: row; justify-content: center; }
    .tech-categories { grid-template-columns: 1fr; }
    .tech-tags { justify-content: flex-start; }
    .about-logo { width: 160px; height: 160px; }
}