/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-700: #334155;
    --gray-500: #64748b;
    --gray-300: #cbd5e1;
    --gray-100: #f1f5f9;
    --white: #ffffff;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.08);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--gray-900);
    line-height: 1.6;
    background: var(--white);
}

a { color: var(--primary); text-decoration: none; }

ul { list-style: none; }

img { max-width: 100%; }

/* ── Layout ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.content-narrow { max-width: 700px; margin: 0 auto; }
.center { text-align: center; }

/* ── Navbar ── */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-100);
    z-index: 100;
    padding: 1rem 0;
}

.nav-container { display: flex; align-items: center; justify-content: space-between; }

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
}
.logo span { color: var(--primary); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-links a {
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

.btn-nav {
    background: var(--primary) !important;
    color: var(--white) !important;
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius);
    transition: background 0.2s;
}
.btn-nav:hover { background: var(--primary-dark) !important; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: 0.2s;
}

/* ── Hero ── */
.hero {
    padding: 6rem 0 5rem;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--white) 100%);
}
.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.15;
    color: var(--dark);
    margin-bottom: 1.25rem;
}
.accent { color: var(--primary); }
.hero-sub {
    font-size: 1.2rem;
    color: var(--gray-500);
    max-width: 560px;
    margin-bottom: 2rem;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ── Buttons ── */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    font-family: inherit;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { border: 2px solid var(--gray-300); color: var(--gray-700); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-full { width: 100%; }

/* ── Sections ── */
.section { padding: 5rem 0; }
.section-alt { background: var(--gray-100); }
.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--dark);
}

/* ── Page Header ── */
.page-header {
    padding: 4rem 0 2rem;
    background: var(--gray-100);
    text-align: center;
}
.page-header h1 { font-size: 2.5rem; color: var(--dark); margin-bottom: 0.5rem; }
.page-header p { color: var(--gray-500); font-size: 1.1rem; }

/* ── Cards ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

.card {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s;
}
.card:hover { box-shadow: var(--shadow-lg); }
.card-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.card h3 { margin-bottom: 0.5rem; color: var(--dark); }
.card p { color: var(--gray-500); font-size: 0.95rem; }

.service-card {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}
.service-card h3 { color: var(--dark); margin-bottom: 0.75rem; font-size: 1.25rem; }
.service-card p { color: var(--gray-500); margin-bottom: 1rem; font-size: 0.95rem; }
.service-card ul { list-style: disc; padding-left: 1.25rem; }
.service-card li { color: var(--gray-700); font-size: 0.9rem; margin-bottom: 0.35rem; }

/* ── Tech Tags ── */
.tech-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; }
.tag {
    background: var(--white);
    border: 1px solid var(--gray-300);
    padding: 0.4rem 1rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-700);
}

/* ── Steps ── */
.steps { display: flex; justify-content: center; gap: 3rem; margin-top: 2rem; flex-wrap: wrap; }
.step { text-align: center; max-width: 220px; }
.step-num {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}
.step h4 { margin-bottom: 0.4rem; color: var(--dark); }
.step p { color: var(--gray-500); font-size: 0.9rem; }

/* ── CTA Section ── */
.cta-section { padding: 4rem 0; }
.cta-section h2 { margin-bottom: 0.5rem; }
.cta-section p { color: var(--gray-500); margin-bottom: 1.5rem; }
.cta-inline { margin-top: 3rem; text-align: center; }
.cta-inline p { font-weight: 600; margin-bottom: 0.75rem; }

/* ── About ── */
.content-narrow p { margin-bottom: 1rem; }
.content-narrow h3 { margin-top: 2rem; margin-bottom: 0.75rem; color: var(--dark); }
.content-narrow ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1rem; }
.content-narrow li { margin-bottom: 0.4rem; }
.lead { font-size: 1.15rem; color: var(--gray-700); }

/* ── Contact Form ── */
.contact-form { margin-top: 1rem; }
.form-group { margin-bottom: 1.5rem; }
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--dark);
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border 0.2s;
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ── Alerts ── */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin: 1rem 0;
    font-size: 0.95rem;
}
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* ── Footer ── */
.footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--gray-100);
    color: var(--gray-500);
    font-size: 0.9rem;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 1.5rem;
        border-bottom: 1px solid var(--gray-100);
        box-shadow: var(--shadow-lg);
        gap: 1rem;
    }
    .nav-links.open { display: flex; }
    .hero h1 { font-size: 2rem; }
    .hero { padding: 4rem 0 3rem; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .steps { flex-direction: column; align-items: center; }
}