:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #0f0f0f;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    --accent-blue: #3b82f6;
    --accent-blue-dark: #1d4ed8;
    --accent-green: #10b981;
    --accent-glow: rgba(59, 130, 246, 0.4);
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.03);
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --accent-blue: #2563eb;
    --accent-blue-dark: #1d4ed8;
    --accent-green: #059669;
    --accent-glow: rgba(37, 99, 235, 0.2);
    --border-color: rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.8);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .logo { font-family: 'Outfit', sans-serif; font-weight: 700; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

section { padding: 5rem 0; }
.section-title { font-size: 2.5rem; text-align: center; margin-bottom: 1rem; color: var(--text-primary); }
.section-sub { text-align: center; color: var(--text-secondary); font-size: 1.15rem; margin-bottom: 3rem; }

/* Navigation */
nav {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
    padding: 1.5rem 0; transition: all 0.3s ease;
    background: rgba(10,10,10,0.85); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}
[data-theme="light"] nav { background: rgba(255,255,255,0.85); }
nav.scrolled { padding: 0.75rem 0; box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
nav .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.8rem; color: var(--text-primary); }
.logo span { color: var(--accent-blue); }
.nav-links { display: flex; list-style: none; gap: 2rem; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-weight: 500; transition: color 0.2s; font-size: 0.95rem; }
.nav-links a:hover { color: var(--accent-blue); }
.theme-toggle { background: none; border: 1px solid var(--border-color); color: var(--text-secondary); padding: 0.5rem 0.6rem; border-radius: 8px; cursor: pointer; transition: all 0.2s; }
.theme-toggle:hover { color: var(--accent-blue); border-color: var(--accent-blue); }

/* Hero */
.hero { padding: 10rem 0 0 0; min-height: 100vh; display: flex; flex-direction: column; justify-content: center; }
.hero-content { display: flex; align-items: center; }
.hero-text { max-width: 750px; }
.hero-text h1 { font-size: 3rem; line-height: 1.2; margin-bottom: 1.5rem; background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 2.5rem; line-height: 1.6; }
.hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; }
.cta-button {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: var(--accent-blue); color: #fff; padding: 0.85rem 2rem;
    border-radius: 12px; text-decoration: none; font-weight: 600;
    font-size: 1.05rem; transition: all 0.3s; box-shadow: 0 4px 20px var(--accent-glow);
}
.cta-button:hover { background: var(--accent-blue-dark); transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); }
.secondary-button {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: transparent; color: var(--text-primary); padding: 0.85rem 2rem;
    border-radius: 12px; text-decoration: none; font-weight: 600; font-size: 1.05rem;
    border: 1px solid var(--border-color); transition: all 0.3s;
}
.secondary-button:hover { border-color: var(--accent-blue); color: var(--accent-blue); }

/* Hero Stats Bar */
.hero-stats { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 2.5rem 0; margin-top: 4rem; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; text-align: center; }
.stat-item { color: var(--text-secondary); font-size: 0.95rem; }
.stat-number { display: block; font-family: 'Outfit', sans-serif; font-size: 2.2rem; font-weight: 700; color: var(--accent-blue); margin-bottom: 0.25rem; }

/* Problems I Solve */
.problems-section { background: var(--bg-secondary); }
.problems-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.problem-card {
    background: var(--bg-tertiary); border: 1px solid var(--border-color);
    border-radius: 16px; padding: 2rem; transition: all 0.3s;
}
.problem-card:hover { border-color: var(--accent-blue); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.3); }
.problem-icon { font-size: 2rem; color: var(--accent-blue); margin-bottom: 1rem; }
.problem-card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.problem-card p { color: var(--text-secondary); margin-bottom: 1rem; font-size: 0.95rem; }
.solution-tag {
    display: inline-flex; align-items: center; gap: 0.4rem;
    background: rgba(16, 185, 129, 0.1); color: var(--accent-green);
    padding: 0.4rem 0.8rem; border-radius: 8px; font-size: 0.85rem; font-weight: 500;
}

/* Services */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.service-card {
    background: var(--bg-tertiary); border: 1px solid var(--border-color);
    border-radius: 16px; padding: 2rem; transition: all 0.3s;
}
.service-card:hover { border-color: var(--accent-blue); transform: translateY(-4px); }
.service-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem; }
.service-header i { font-size: 1.5rem; color: var(--accent-blue); }
.service-header h3 { font-size: 1.2rem; }
.service-list { list-style: none; }
.service-list li { color: var(--text-secondary); padding: 0.5rem 0; border-bottom: 1px solid var(--border-color); font-size: 0.95rem; }
.service-list li:last-child { border-bottom: none; }
.service-list li::before { content: "▸ "; color: var(--accent-blue); }

/* Case Studies */
.case-studies { background: var(--bg-secondary); }
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.case-card {
    background: var(--bg-tertiary); border: 1px solid var(--border-color);
    border-radius: 16px; padding: 2rem; transition: all 0.3s;
}
.case-card:hover { border-color: var(--accent-blue); }
.case-tag {
    display: inline-block; background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue); padding: 0.3rem 0.8rem; border-radius: 6px;
    font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 1rem;
}
.case-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.case-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; margin-bottom: 1rem; }
.case-tech { color: var(--text-tertiary); font-size: 0.85rem; font-family: monospace; }

/* Process */
.process-steps { display: flex; align-items: flex-start; justify-content: center; gap: 0; margin: 3rem 0; flex-wrap: wrap; }
.process-step {
    background: var(--bg-tertiary); border: 1px solid var(--border-color);
    border-radius: 16px; padding: 2rem 1.5rem; text-align: center; flex: 0 0 220px;
    transition: all 0.3s;
}
.process-step:hover { border-color: var(--accent-blue); transform: translateY(-4px); }
.step-number {
    width: 48px; height: 48px; background: var(--accent-blue); color: #fff;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem; font-weight: 700; margin: 0 auto 1rem;
}
.process-step h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.process-step p { color: var(--text-secondary); font-size: 0.9rem; }
.process-arrow { display: flex; align-items: center; padding: 0 0.75rem; color: var(--accent-blue); font-size: 1.5rem; margin-top: 3rem; }
.process-quote { text-align: center; margin-top: 4rem; padding: 2rem; background: var(--bg-tertiary); border-radius: 16px; border: 1px solid var(--border-color); }
.process-quote p { font-size: 1.4rem; font-weight: 300; color: var(--text-secondary); line-height: 1.6; }
.process-quote p span { color: var(--accent-blue); font-weight: 600; }
.quote-sub { font-size: 1rem !important; margin-top: 1rem; color: var(--text-tertiary) !important; }

/* Tech Stack */
.stack-section { background: var(--bg-secondary); }
.stack-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 3rem; }
.stack-category { background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: 16px; padding: 1.5rem; }
.stack-category h4 { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; color: var(--accent-blue); font-size: 0.95rem; }
.stack-category span {
    display: inline-block; background: var(--bg-secondary); color: var(--text-secondary);
    padding: 0.3rem 0.7rem; border-radius: 6px; margin: 0.25rem; font-size: 0.85rem;
    border: 1px solid var(--border-color);
}
.trading-edge {
    background: linear-gradient(135deg, rgba(59,130,246,0.05) 0%, rgba(16,185,129,0.05) 100%);
    border: 1px solid rgba(59,130,246,0.2); border-radius: 16px; padding: 2rem; text-align: center;
}
.trading-edge h3 { font-size: 1.2rem; margin-bottom: 0.75rem; color: var(--accent-blue); }
.trading-edge h3 i { margin-right: 0.5rem; }
.trading-edge p { color: var(--text-secondary); max-width: 700px; margin: 0 auto; font-size: 0.95rem; }

/* Contact */
.contact-section { background: var(--bg-primary); }
.contact-wrapper { max-width: 650px; margin: 0 auto; }
.contact-info p { color: var(--text-secondary); margin-bottom: 2rem; font-size: 1.05rem; line-height: 1.7; }
.contact-links { display: flex; flex-direction: column; gap: 0.75rem; }
.contact-item {
    display: flex; align-items: center; gap: 1rem;
    background: var(--bg-tertiary); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 1rem 1.5rem; text-decoration: none;
    color: var(--text-primary); transition: all 0.2s; font-size: 0.95rem;
}
.contact-item:hover { border-color: var(--accent-blue); background: rgba(59,130,246,0.05); }
.contact-item i { color: var(--accent-blue); font-size: 1.2rem; width: 24px; text-align: center; }
.cta-contact { background: var(--accent-blue); color: #fff !important; border-color: var(--accent-blue); font-weight: 600; }
.cta-contact i { color: #fff; }
.cta-contact:hover { background: var(--accent-blue-dark); border-color: var(--accent-blue-dark); }

/* Footer */
footer { background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 3rem 0; }
.footer-content { text-align: center; }
.footer-logo { font-size: 2rem; font-family: 'Outfit', sans-serif; font-weight: 700; margin-bottom: 0.75rem; }
.footer-logo span { color: var(--accent-blue); }
.footer-content p { color: var(--text-tertiary); font-size: 0.9rem; margin-bottom: 1rem; }
.footer-content p a { color: var(--accent-blue); text-decoration: none; }
.social-icons { display: flex; justify-content: center; gap: 1rem; margin-top: 1rem; }
.social-icons a { color: var(--text-tertiary); font-size: 1.2rem; transition: color 0.2s; }
.social-icons a:hover { color: var(--accent-blue); }

/* Mobile CTA */
.mobile-cta { display: none; position: fixed; bottom: 0; left: 0; width: 100%; z-index: 999; padding: 0.75rem; background: var(--bg-primary); border-top: 1px solid var(--border-color); }
.mobile-cta a {
    display: flex; align-items: center; justify-content: center; gap: 0.5rem;
    background: var(--accent-blue); color: #fff; padding: 0.85rem; border-radius: 12px;
    text-decoration: none; font-weight: 600; font-size: 1.05rem;
}

/* Responsive */
@media (max-width: 900px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .problems-grid, .cases-grid, .service-grid { grid-template-columns: 1fr; }
    .stack-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { flex-direction: column; align-items: stretch; }
    .process-step { flex: none; }
    .process-arrow { transform: rotate(90deg); margin: 0; justify-content: center; padding: 0.5rem 0; }
    .hero-text h1 { font-size: 2rem; }
    .section-title { font-size: 1.8rem; }
    .nav-links { display: none; }
    .mobile-cta { display: block; }
    footer { padding-bottom: 5rem; }
}

@media (max-width: 600px) {
    .container { padding: 0 1.25rem; }
    .hero { padding-top: 7rem; }
    .hero-text h1 { font-size: 1.7rem; }
    .hero-sub { font-size: 1rem; }
    .hero-btns { flex-direction: column; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .stat-number { font-size: 1.6rem; }
    section { padding: 3rem 0; }
}