/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #0f1629;
    --bg-card: #141d2f;
    --bg-card-hover: #1a2540;
    --text-primary: #e0e8f0;
    --text-secondary: #8899aa;
    --text-muted: #556677;
    --neon-green: #00ff88;
    --neon-cyan: #00d4ff;
    --neon-purple: #7c3aed;
    --gradient: linear-gradient(135deg, #00ff88, #00d4ff, #7c3aed);
    --gradient-btn: linear-gradient(135deg, #00ff88 0%, #00d4ff 100%);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(0, 255, 136, 0.3);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-neon: 0 0 30px rgba(0, 255, 136, 0.15);
    --radius: 12px;
    --radius-lg: 20px;
    --font: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: var(--neon-cyan);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--neon-green);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Gradient Text ===== */
.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 15, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo img {
    height: 36px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-link.nav-cta {
    background: var(--gradient-btn);
    color: var(--bg-primary);
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
}

.nav-link.nav-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 24px 80px;
    max-width: 1200px;
    margin: 0 auto;
    gap: 60px;
    position: relative;
}

#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}

.hero-content {
    flex: 1;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 255, 136, 0.08);
    border: 1px solid rgba(0, 255, 136, 0.2);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--neon-green);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--neon-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

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

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text-primary);
    background: transparent;
}

.btn-outline:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--neon-green);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Hero Code Window */
.hero-visual {
    flex: 0.9;
    z-index: 1;
}

.code-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border);
}

.code-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28c840; }

.code-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.code-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--text-secondary);
    overflow-x: auto;
}

.code-body .kw { color: var(--neon-purple); }
.code-body .cls { color: var(--neon-green); }
.code-body .fn { color: var(--neon-cyan); }

/* ===== Sections ===== */
.section {
    padding: 100px 0;
}

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

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

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--neon-green);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
}

/* ===== About ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-text strong {
    color: var(--text-primary);
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.highlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all 0.3s ease;
}

.highlight-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-neon);
    transform: translateY(-2px);
}

.highlight-icon {
    font-size: 1.5rem;
    margin-bottom: 12px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.highlight-card h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.highlight-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Services ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all 0.3s ease;
}

.service-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-neon);
    transform: translateY(-4px);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 136, 0.08);
    border: 1px solid rgba(0, 255, 136, 0.15);
    border-radius: 12px;
    font-size: 1.4rem;
    color: var(--neon-green);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Tech Stack ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.tech-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}

.tech-category h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.tech-category h4 i {
    color: var(--neon-cyan);
    margin-right: 8px;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.82rem;
    color: var(--neon-cyan);
}

/* ===== Process ===== */
.process-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.process-step {
    text-align: center;
    padding: 32px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    position: relative;
}

.process-step:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.step-number {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}

.process-step h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.process-step p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== Contact ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-info .section-tag {
    text-align: left;
}

.contact-info h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
}

.contact-item i {
    color: var(--neon-green);
    width: 20px;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--neon-green);
}

.form-group select {
    appearance: none;
    cursor: pointer;
}

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

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    height: 32px;
    margin-bottom: 12px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 0.95rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.footer-links a:hover {
    color: var(--neon-green);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--gradient-btn);
    border: none;
    border-radius: 50%;
    color: var(--bg-primary);
    font-size: 1rem;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        padding-top: 100px;
    }
    .hero-visual {
        width: 100%;
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 80px 40px;
        gap: 24px;
        transition: right 0.3s ease;
        border-left: 1px solid var(--border);
    }
    .nav-menu.active {
        right: 0;
    }
    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }
    .about-grid {
        grid-template-columns: 1fr;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }
    .tech-grid {
        grid-template-columns: 1fr;
    }
    .process-grid {
        grid-template-columns: 1fr;
    }
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
}