/*===== плавную прокрутку ===== */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* чтобы sticky-navbar не закрывал заголовок */
}

body {
            background: #f5f7fb;
            font-family: 'Segoe UI', Tahoma, sans-serif;
            color: #1a1d29;
        }

        /* ===== Navbar ===== */
        .navbar {
            background: rgba(255, 255, 255, 0.97) !important;
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            background: linear-gradient(135deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar .nav-link {
            color: #555 !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            border-radius: 8px;
            transition: all 0.3s ease;
            margin: 0 2px;
        }
        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #fff !important;
            background: linear-gradient(135deg, #667eea, #764ba2);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }
        .dropdown-menu {
            border: none;
            border-radius: 12px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
            padding: 8px;
            margin-top: 8px;
            animation: dropdownFade 0.25s ease;
        }
        @keyframes dropdownFade {
            from { opacity: 0; transform: translateY(-8px); }
            to   { opacity: 1; transform: translateY(0); }
        }
        .dropdown-item {
            border-radius: 8px;
            padding: 10px 14px;
            color: #555;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .dropdown-item:hover,
        .dropdown-item.active {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff !important;
        }
        .dropdown-item i { width: 20px; }
        .nav-link.dropdown-toggle::after { transition: transform 0.3s ease; }
        .nav-link.dropdown-toggle[aria-expanded="true"]::after { transform: rotate(180deg); }
        .navbar .nav-link.active-parent {
            color: #667eea !important;
            background: rgba(102, 126, 234, 0.1);
        }

        /* ===== Hero ===== */
        .hero-crypto {
            background: linear-gradient(135deg, #1a1d29 0%, #2d1b4e 100%);
            color: #fff;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-crypto::before {
            content: '';
            position: absolute;
            top: -50%; right: -10%;
            width: 500px; height: 500px;
            background: radial-gradient(circle, rgba(102, 126, 234, 0.35), transparent 70%);
            border-radius: 50%;
        }
        .hero-crypto::after {
            content: '';
            position: absolute;
            bottom: -30%; left: -10%;
            width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(247, 147, 26, 0.2), transparent 70%);
            border-radius: 50%;
        }
        .hero-crypto .container { position: relative; z-index: 1; }
        .hero-crypto h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
        }
        .hero-crypto .highlight {
            background: linear-gradient(135deg, #f7931a, #ffb84d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* ===== Секции ===== */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            color: #6b7280;
            margin-bottom: 2.5rem;
        }

        /* ===== Карточки ===== */
        .feature-card {
            background: #fff;
            border: none;
            border-radius: 16px;
            padding: 32px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
        }
        .feature-card .icon {
            width: 56px; height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff;
            margin-bottom: 20px;
        }
        .feature-card .icon.gold {
            background: linear-gradient(135deg, #f7931a, #ffb84d);
        }

        /* ===== Статистика ===== */
        .stats-block {
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 20px;
            color: #fff;
            padding: 50px 30px;
        }
        .stat-item h3 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 0.25rem;
        }
        .stat-item p {
            margin: 0;
            opacity: 0.85;
        }

        /* ===== Калькулятор ===== */
        .calc-box {
            background: #fff;
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
        }
        .calc-result {
            background: linear-gradient(135deg, #f5f7fb, #eef1f8);
            border-radius: 14px;
            padding: 24px;
        }
        .calc-result .value {
            font-size: 2rem;
            font-weight: 800;
            color: #667eea;
        }
        .form-control, .form-select {
            border-radius: 10px;

            padding: 12px 16px;
            border: 2px solid #e5e7eb;
        }
        .form-control:focus, .form-select:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.15);
        }

        .btn-gradient {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff;
            border: none;
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
            transition: all 0.3s ease;
        }
        .btn-gradient:hover {
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(102, 126, 234, 0.6);
        }
        .btn-outline-light-custom {
            border: 2px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }

        /* ===== FAQ / Accordion ===== */
        .accordion-item {
            border: none;
            border-radius: 14px !important;
            margin-bottom: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            overflow: hidden;
        }
        .accordion-button {
            font-weight: 600;
            padding: 20px 24px;
            border-radius: 14px !important;
        }
        .accordion-button:not(.collapsed) {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff;
        }
        .accordion-button:not(.collapsed)::after {
            filter: brightness(0) invert(1);
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #1a1d29, #2d1b4e);
            border-radius: 20px;
            color: #fff;
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -50%; right: -10%;
            width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(247, 147, 26, 0.25), transparent 70%);
            border-radius: 50%;
        }
        .cta-block > * { position: relative; z-index: 1; }

        footer {
            background: #1a1d29;
            color: rgba(255, 255, 255, 0.7);
            padding: 40px 0 20px;
        }
        footer a { color: rgba(255, 255, 255, 0.7); text-decoration: none; transition: color 0.2s; }
        footer a:hover { color: #f7931a; }
        footer .social a {
            display: inline-flex;
            width: 40px; height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            margin-right: 8px;
            transition: all 0.3s ease;
        }
        footer .social a:hover {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: #fff;
            transform: translateY(-3px);
        }

        @media (max-width: 991px) {
            .navbar .nav-link { margin: 4px 0; }
            .hero-crypto h1 { font-size: 2rem; }
            .hero-crypto { padding: 50px 0; }
            .stat-item h3 { font-size: 2rem; }
        }

/* ===== Диапазон LTV ползунок ===== */
.form-range::-webkit-slider-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.5);
}
.form-range::-moz-range-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 50%;
}
.form-range::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, #667eea var(--range-progress, 50%), #e5e7eb var(--range-progress, 50%));
}