body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background-color: #f3f4f6; /* gray-100 */
            color: #0f172a;           /* slate-900 */
        }
        
        .navbar {
            position: sticky;
            top: 0;
            z-index: 50;
            background: radial-gradient(circle at top left, #020617, #020617);
            border-bottom: 1px solid rgba(15,23,42,0.9);
            box-shadow: 0 18px 40px rgba(15,23,42,0.75);
            backdrop-filter: blur(14px);
        }
        .navbar-brand span {
            font-weight: 600;
            letter-spacing: .03em;
            color: #e5e7eb;
        }
        .nav-link {
            color: #e5e7eb;
            font-size: .92rem;
            padding: .38rem .95rem;
            border-radius: 999px;
            margin: 0 .18rem;
            font-weight: 500;
            border: 1px solid rgba(148,163,184,0.45);
            background: radial-gradient(circle at top left, rgba(15,23,42,0.85), rgba(15,23,42,0.6));
            box-shadow: 0 8px 18px rgba(15,23,42,0.55);
            transition: background .18s ease-out, color .18s ease-out, box-shadow .18s ease-out, transform .18s ease-out;
        }
        .nav-link:hover,
        .nav-link:focus {
            color: #ecfeff;
            background: linear-gradient(135deg, #0ea5e9, #22d3ee);
            box-shadow: 0 12px 26px rgba(15,23,42,0.75);
            transform: translateY(-1px);
            text-decoration: none;
            border-color: transparent;
        }
.marquee {
            background: linear-gradient(to right, #0f172a, #1f2937);
            color: #e5e7eb;
            overflow: hidden;
            white-space: nowrap;
            border-bottom: 1px solid rgba(31,41,55,0.6);
        }
        .marquee-track {
            display: inline-block;
            padding: .4rem 0;
            animation: marquee-x 18s linear infinite;
        }
        .marquee-item {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            font-size: .82rem;
            text-transform: uppercase;
            letter-spacing: .08em;
            opacity: .9;
        }
        .marquee-item i {
            font-size: .85rem;
        }
        .marquee-sep {
            display: inline-block;
            width: 2rem;
        }
        @keyframes marquee-x {
            0%   { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        .hero {
            padding: 3.5rem 0 3rem;
            background: radial-gradient(circle at top left, rgba(56,189,248,0.18), #eff6ff);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            padding: .3rem .9rem;
            border-radius: 999px;
            background: rgba(15,23,42,0.04);
            border: 1px solid rgba(148,163,184,0.7);
            font-size: .75rem;
            text-transform: uppercase;
            letter-spacing: .08em;
            color: #0f172a;
        }
        .hero-title {
            font-size: clamp(2.1rem, 3.7vw, 3rem);
            font-weight: 800;
            letter-spacing: -.03em;
            color: #020617;
        }
        .hero-highlight {
            color: #0ea5e9;
        }
        .hero-lead {
            font-size: 1.02rem;
            color: #4b5563;
        }
        .hero-mini {
            font-size: .88rem;
            color: #6b7280;
        }

        .hero-card {
            background-color: #ffffff;
            border-radius: 1.5rem;
            border: 1px solid #e5e7eb;
            box-shadow: 0 24px 50px rgba(15,23,42,0.12);
            padding: 1.6rem 1.6rem 1.4rem;
        }

        .hero-screenshot {
            border-radius: 1.1rem;
            border: 1px solid #e5e7eb;
            background: radial-gradient(circle at top, rgba(56,189,248,0.18), #eff6ff);
        }

        .hero-screenshot-row {
            background-color: #ffffffcc;
            border-radius: .75rem;
            padding: .55rem .7rem;
            border: 1px solid rgba(148,163,184,0.45);
        }

        .hero-screenshot-row + .hero-screenshot-row {
            margin-top: .35rem;
        }

        .hero-screenshot-row .small {
            color: #6b7280;
        }

        .section {
            padding: 3.2rem 0;
        }
        .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: .2rem;
            color: #111827;
        }
        .section-sub {
            font-size: .96rem;
            color: #6b7280;
        }

        .feature-card {
            background: #ffffff;
            border-radius: 1rem;
            border: 1px solid #e5e7eb;
            padding: 1.3rem 1.2rem;
            height: 100%;
            box-shadow: 0 10px 25px rgba(15,23,42,0.04);
        }
        .feature-icon {
            width: 40px;
            height: 40px;
            border-radius: .9rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(56,189,248,0.12), rgba(37,99,235,0.18));
            margin-bottom: .8rem;
            font-size: 1.35rem;
            color: #0ea5e9;
        }
        .feature-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: #111827;
        }
        .feature-text {
            font-size: .9rem;
            color: #4b5563;
        }

        .step-card {
            background: #ffffff;
            border-radius: 1rem;
            border: 1px dashed #d1d5db;
            padding: 1.1rem 1.2rem;
            height: 100%;
        }
        .step-number {
            width: 30px;
            height: 30px;
            border-radius: 999px;
            background: #0ea5e9;
            color: #ecfeff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: .9rem;
            margin-bottom: .6rem;
        }

        .usecase-card {
            background: #ffffff;
            border-radius: 1rem;
            border: 1px solid #bbf7d0;
            padding: 1.2rem 1.2rem;
            height: 100%;
            box-shadow: 0 12px 30px rgba(22,163,74,0.06);
        }
        .usecase-badge {
            font-size: .75rem;
            text-transform: uppercase;
            letter-spacing: .08em;
            color: #15803d;
        }

        /* Basit görsel bloklar (resim alanı gibi) */
        .mock-image {
            width: 100%;
            border-radius: 1rem;
            border: 1px solid #e5e7eb;
            background: linear-gradient(135deg, #eff6ff, #e0f2fe);
            position: relative;
            overflow: hidden;
        }
        .mock-image::before {
            content: "";
            position: absolute;
            inset: 18%;
            border-radius: .8rem;
            background: radial-gradient(circle at top left, rgba(56,189,248,0.3), rgba(15,23,42,0.05));
        }

        .cta {
            background: linear-gradient(135deg, #eff6ff, #e0f2fe);
            border-radius: 1.4rem;
            border: 1px solid #d1d5db;
            padding: 1.8rem 1.6rem;
        }
        .cta-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: #111827;
        }

        .contact-card {
            background: #ffffff;
            border-radius: 1rem;
            border: 1px solid #e5e7eb;
            padding: 1.4rem 1.4rem 1.2rem;
            box-shadow: 0 12px 28px rgba(15,23,42,0.06);
        }
        .contact-label {
            font-size: .8rem;
            text-transform: uppercase;
            color: #9ca3af;
            letter-spacing: .08em;
        }
        .contact-value a {
            color: #111827;
            text-decoration: none;
        }
        .contact-value a:hover {
            color: #0ea5e9;
        }

        footer {
            border-top: 1px solid #e5e7eb;
            background: #ffffff;
            color: #6b7280;
        }
/* Scrollbar (tema uyumlu) */
*::-webkit-scrollbar{width:12px;height:12px}
*::-webkit-scrollbar-track{background:rgba(15,23,42,.08)}
*::-webkit-scrollbar-thumb{background:rgba(15,23,42,.28);border-radius:999px;border:3px solid rgba(15,23,42,.08)}
*::-webkit-scrollbar-thumb:hover{background:rgba(15,23,42,.40)}
*{scrollbar-color:rgba(15,23,42,.35) rgba(15,23,42,.10);scrollbar-width:thin}