/* ============================================
   itlion-kontur.ru — Контур.Экстерн
   Prefix: ext_
   Colors: #FC7630 (orange), #661429 (burgundy)
   ============================================ */

:root {
    --ext-orange: #FC7630;
    --ext-burgundy: #661429;
    --ext-burgundy-light: #7a1f35;
    --ext-orange-light: #FFF4ED;
    --ext-orange-hover: #e5691f;
    --ext-dark: #1a1a2e;
    --ext-text: #2c2c3a;
    --ext-text-secondary: #5a5a6e;
    --ext-bg: #ffffff;
    --ext-bg-alt: #f8f6f4;
    --ext-bg-warm: #fdf9f6;
    --ext-border: #e8e4e0;
    --ext-radius: 12px;
    --ext-radius-sm: 8px;
    --ext-radius-lg: 20px;
    --ext-shadow: 0 2px 12px rgba(26, 26, 46, 0.06);
    --ext-shadow-md: 0 4px 24px rgba(26, 26, 46, 0.08);
    --ext-shadow-lg: 0 8px 40px rgba(26, 26, 46, 0.12);
    --ext-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --ext-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --ext-font-display: 'Unbounded', sans-serif;
}

/* ---- Reset & base ---- */
.ext_page {
    font-family: var(--ext-font);
    color: var(--ext-text);
    line-height: 1.65;
    font-size: 16px;
    background: var(--ext-bg);
    -webkit-font-smoothing: antialiased;
}

.ext_page *,
.ext_page *::before,
.ext_page *::after {
    box-sizing: border-box;
}

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

.ext_section {
    padding: 80px 0;
}

.ext_section:nth-child(even) {
    background: var(--ext-bg-alt);
}

/* ---- Typography ---- */
.ext_h1 {
    font-family: var(--ext-font-display);
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 600;
    line-height: 1.2;
    color: var(--ext-dark);
    margin: 0 0 16px;
}

.ext_h2 {
    font-family: var(--ext-font-display);
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 500;
    line-height: 1.25;
    color: var(--ext-dark);
    margin: 0 0 16px;
}

.ext_h3 {
    font-family: var(--ext-font-display);
    font-size: clamp(17px, 2vw, 20px);
    font-weight: 500;
    line-height: 1.3;
    color: var(--ext-dark);
    margin: 0 0 10px;
}

.ext_subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--ext-text-secondary);
    line-height: 1.55;
    margin: 0 0 32px;
    max-width: 640px;
}

.ext_section-header {
    text-align: center;
    margin-bottom: 48px;
}

.ext_section-header .ext_subtitle {
    margin-left: auto;
    margin-right: auto;
}

.ext_label {
    display: inline-block;
    font-family: var(--ext-font-display);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ext-orange);
    margin-bottom: 12px;
}

/* ---- Buttons ---- */
.ext_btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--ext-font);
    font-size: 15px;
    font-weight: 500;
    border: none;
    border-radius: var(--ext-radius-sm);
    cursor: pointer;
    transition: all var(--ext-transition);
    padding: 14px 28px;
    text-decoration: none;
    white-space: nowrap;
}

.ext_btn--primary {
    background: var(--ext-orange);
    color: #fff;
}

.ext_btn--primary:hover {
    background: var(--ext-orange-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(252, 118, 48, 0.35);
}

.ext_btn--secondary {
    background: transparent;
    color: var(--ext-orange);
    border: 1.5px solid var(--ext-orange);
}

.ext_btn--secondary:hover {
    background: var(--ext-orange-light);
}

.ext_btn--dark {
    background: var(--ext-burgundy);
    color: #fff;
}

.ext_btn--dark:hover {
    background: var(--ext-burgundy-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(102, 20, 41, 0.3);
}

.ext_btn--ghost {
    background: transparent;
    color: var(--ext-text);
    padding: 14px 20px;
}

.ext_btn--ghost:hover {
    color: var(--ext-orange);
}

.ext_btn--sm {
    font-size: 13px;
    padding: 10px 20px;
}

.ext_btn-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ---- Hero section ---- */
.ext_hero {
    padding: 100px 0 80px;
    background: linear-gradient(165deg, #fff 0%, var(--ext-orange-light) 50%, #fff 100%);
    position: relative;
    overflow: hidden;
}

.ext_hero::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -80px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(252, 118, 48, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.ext_hero-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 48px;
    align-items: start;
}

.ext_hero-content {
    padding-top: 16px;
}

.ext_hero-badges {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.ext_hero-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ext-text-secondary);
    background: rgba(255, 255, 255, 0.7);
    padding: 6px 14px;
    border-radius: 50px;
    border: 1px solid var(--ext-border);
}

.ext_hero-badge svg {
    width: 16px;
    height: 16px;
    color: var(--ext-orange);
    flex-shrink: 0;
}

.ext_hero .ext_h1 {
    margin-bottom: 20px;
}

.ext_hero .ext_subtitle {
    margin-bottom: 28px;
    max-width: 540px;
}

/* ---- Hero form ---- */
.ext_hero-form-wrap {
    background: #fff;
    border-radius: var(--ext-radius-lg);
    padding: 32px;
    box-shadow: var(--ext-shadow-lg);
    border: 1px solid var(--ext-border);
    position: sticky;
    top: 100px;
}

.ext_hero-form-title {
    font-family: var(--ext-font-display);
    font-size: 18px;
    font-weight: 500;
    color: var(--ext-dark);
    margin: 0 0 20px;
}

.ext_form-group {
    margin-bottom: 14px;
}

.ext_form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--ext-text-secondary);
    margin-bottom: 5px;
}

.ext_form-input,
.ext_form-select,
.ext_form-textarea {
    width: 100%;
    font-family: var(--ext-font);
    font-size: 14px;
    padding: 11px 14px;
    border: 1px solid var(--ext-border);
    border-radius: var(--ext-radius-sm);
    background: var(--ext-bg-warm);
    color: var(--ext-text);
    transition: border-color var(--ext-transition);
    outline: none;
}

.ext_form-input:focus,
.ext_form-select:focus,
.ext_form-textarea:focus {
    border-color: var(--ext-orange);
    box-shadow: 0 0 0 3px rgba(252, 118, 48, 0.1);
}

.ext_form-textarea {
    resize: vertical;
    min-height: 70px;
}

.ext_form-hint {
    font-size: 12px;
    color: var(--ext-text-secondary);
    margin-top: 10px;
    line-height: 1.5;
}

.ext_form-btn {
    width: 100%;
    margin-top: 6px;
}

/* ---- Cards grid ---- */
.ext_cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.ext_card {
    background: #fff;
    border-radius: var(--ext-radius);
    padding: 28px;
    border: 1px solid var(--ext-border);
    transition: all var(--ext-transition);
    display: flex;
    flex-direction: column;
}

.ext_card:hover {
    border-color: rgba(252, 118, 48, 0.3);
    box-shadow: var(--ext-shadow-md);
    transform: translateY(-2px);
}

.ext_card-icon {
    width: 44px;
    height: 44px;
    background: var(--ext-orange-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    color: var(--ext-orange);
    flex-shrink: 0;
}

.ext_card-icon svg {
    width: 22px;
    height: 22px;
}

.ext_card p {
    font-size: 14px;
    color: var(--ext-text-secondary);
    line-height: 1.6;
    margin: 0 0 auto;
    padding-bottom: 16px;
}

.ext_card .ext_btn--sm {
    align-self: flex-start;
}

/* ---- Segments / Tabs ---- */
.ext_segments {
    background: var(--ext-bg-alt);
}

.ext_tabs-nav {
    display: flex;
    gap: 4px;
    background: #fff;
    border-radius: var(--ext-radius);
    padding: 4px;
    border: 1px solid var(--ext-border);
    margin-bottom: 32px;
    overflow-x: auto;
}

.ext_tab-btn {
    flex: 1;
    font-family: var(--ext-font);
    font-size: 14px;
    font-weight: 500;
    padding: 12px 16px;
    border: none;
    background: transparent;
    color: var(--ext-text-secondary);
    border-radius: var(--ext-radius-sm);
    cursor: pointer;
    transition: all var(--ext-transition);
    white-space: nowrap;
}

.ext_tab-btn:hover {
    color: var(--ext-text);
}

.ext_tab-btn.active {
    background: var(--ext-orange);
    color: #fff;
}

.ext_tab-panel {
    display: none;
    animation: ext_fadeIn 0.3s ease;
}

.ext_tab-panel.active {
    display: block;
}

@keyframes ext_fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.ext_segment-card {
    background: #fff;
    border-radius: var(--ext-radius);
    padding: 36px;
    border: 1px solid var(--ext-border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
}

.ext_segment-situation {
    font-size: 15px;
    color: var(--ext-text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    padding-left: 16px;
    border-left: 3px solid var(--ext-orange);
}

.ext_segment-list {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
}

.ext_segment-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--ext-text);
    line-height: 1.55;
}

.ext_segment-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--ext-orange);
    opacity: 0.6;
}

.ext_segment-partner {
    padding: 24px;
    background: var(--ext-orange-light);
    border-radius: var(--ext-radius);
}

.ext_segment-partner-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--ext-dark);
    margin-bottom: 10px;
}

/* ---- Why partner ---- */
.ext_why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.ext_why-item {
    display: flex;
    gap: 14px;
    padding: 20px;
    background: #fff;
    border-radius: var(--ext-radius);
    border: 1px solid var(--ext-border);
    transition: all var(--ext-transition);
}

.ext_why-item:hover {
    border-color: rgba(252, 118, 48, 0.25);
}

.ext_why-icon {
    width: 36px;
    height: 36px;
    background: var(--ext-orange-light);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--ext-orange);
}

.ext_why-icon svg {
    width: 18px;
    height: 18px;
}

.ext_why-text h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--ext-dark);
    margin: 0 0 4px;
}

.ext_why-text p {
    font-size: 13px;
    color: var(--ext-text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* ---- Steps ---- */
.ext_steps-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    position: relative;
    max-width: 720px;
    margin: 0 auto;
}

.ext_step {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 20px;
    padding-bottom: 36px;
    position: relative;
}

.ext_step:last-child {
    padding-bottom: 0;
}

.ext_step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 27px;
    top: 56px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--ext-orange), var(--ext-border));
}

.ext_step-num {
    width: 56px;
    height: 56px;
    background: var(--ext-orange);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--ext-font-display);
    font-size: 18px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.ext_step-content h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--ext-dark);
    margin: 0 0 6px;
    padding-top: 4px;
}

.ext_step-content p {
    font-size: 14px;
    color: var(--ext-text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* ---- Features ---- */
.ext_features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.ext_feature {
    padding: 24px;
    background: #fff;
    border-radius: var(--ext-radius);
    border: 1px solid var(--ext-border);
    transition: all var(--ext-transition);
}

.ext_feature:hover {
    box-shadow: var(--ext-shadow);
}

.ext_feature h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--ext-dark);
    margin: 0 0 8px;
}

.ext_feature p {
    font-size: 14px;
    color: var(--ext-text-secondary);
    margin: 0 0 8px;
    line-height: 1.55;
}

.ext_feature-audience {
    font-size: 12px;
    color: var(--ext-orange);
    font-weight: 500;
}

/* ---- Scenarios ---- */
.ext_scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.ext_scenario {
    padding: 24px;
    border-radius: var(--ext-radius);
    border: 1px solid var(--ext-border);
    background: #fff;
    transition: all var(--ext-transition);
}

.ext_scenario:hover {
    border-color: rgba(252, 118, 48, 0.3);
    box-shadow: var(--ext-shadow);
}

.ext_scenario p {
    font-size: 14px;
    color: var(--ext-text-secondary);
    margin: 0;
    line-height: 1.55;
}

.ext_scenario strong {
    color: var(--ext-dark);
    font-weight: 600;
}

/* ---- Problems / Accordion ---- */
.ext_problems-list {
    max-width: 800px;
    margin: 0 auto;
}

.ext_problem {
    border-bottom: 1px solid var(--ext-border);
}

.ext_problem:first-child {
    border-top: 1px solid var(--ext-border);
}

.ext_problem-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0;
    font-family: var(--ext-font);
    font-size: 15px;
    font-weight: 500;
    color: var(--ext-dark);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: color var(--ext-transition);
}

.ext_problem-q:hover {
    color: var(--ext-orange);
}

.ext_problem-q svg {
    width: 20px;
    height: 20px;
    color: var(--ext-text-secondary);
    transition: transform var(--ext-transition);
    flex-shrink: 0;
}

.ext_problem.open .ext_problem-q svg {
    transform: rotate(45deg);
    color: var(--ext-orange);
}

.ext_problem-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.ext_problem.open .ext_problem-a {
    max-height: 500px;
    padding-bottom: 18px;
}

.ext_problem-a p {
    font-size: 14px;
    color: var(--ext-text-secondary);
    line-height: 1.65;
    margin: 0;
}

/* ---- Pricing ---- */
.ext_pricing {
    background: var(--ext-bg-warm);
}

.ext_pricing-card {
    background: #fff;
    border-radius: var(--ext-radius-lg);
    padding: 40px;
    border: 1px solid var(--ext-border);
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}

.ext_pricing-factors {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    text-align: left;
    margin: 28px 0 32px;
}

.ext_pricing-factor {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--ext-text);
    line-height: 1.5;
}

.ext_pricing-factor svg {
    width: 18px;
    height: 18px;
    color: var(--ext-orange);
    flex-shrink: 0;
    margin-top: 2px;
}

/* ---- Trust ---- */
.ext_trust-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.ext_trust-item {
    text-align: center;
    padding: 24px 16px;
    background: #fff;
    border-radius: var(--ext-radius);
    border: 1px solid var(--ext-border);
}

.ext_trust-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    background: var(--ext-orange-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ext-orange);
}

.ext_trust-icon svg {
    width: 24px;
    height: 24px;
}

.ext_trust-item p {
    font-size: 14px;
    color: var(--ext-text);
    margin: 0;
    line-height: 1.5;
}

.ext_trust-placeholders {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.ext_trust-placeholder {
    border: 2px dashed var(--ext-border);
    border-radius: var(--ext-radius);
    padding: 40px 24px;
    text-align: center;
    color: var(--ext-text-secondary);
    font-size: 14px;
}

/* ---- FAQ ---- */
.ext_faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.ext_faq-item {
    border-bottom: 1px solid var(--ext-border);
}

.ext_faq-item:first-child {
    border-top: 1px solid var(--ext-border);
}

.ext_faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 0;
    font-family: var(--ext-font);
    font-size: 15px;
    font-weight: 500;
    color: var(--ext-dark);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: color var(--ext-transition);
}

.ext_faq-q:hover {
    color: var(--ext-orange);
}

.ext_faq-q svg {
    width: 20px;
    height: 20px;
    color: var(--ext-text-secondary);
    transition: transform var(--ext-transition);
    flex-shrink: 0;
}

.ext_faq-item.open .ext_faq-q svg {
    transform: rotate(45deg);
    color: var(--ext-orange);
}

.ext_faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.ext_faq-item.open .ext_faq-a {
    max-height: 600px;
    padding-bottom: 20px;
}

.ext_faq-a p {
    font-size: 14px;
    color: var(--ext-text-secondary);
    line-height: 1.65;
    margin: 0;
}

/* ---- CTA final ---- */
.ext_cta-final {
    background: var(--ext-burgundy);
    padding: 80px 0;
}

.ext_cta-final-inner {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 48px;
    align-items: start;
}

.ext_cta-final .ext_h2 {
    color: #fff;
}

.ext_cta-final .ext_subtitle {
    color: rgba(255, 255, 255, 0.75);
}

.ext_cta-final-form {
    background: #fff;
    border-radius: var(--ext-radius-lg);
    padding: 32px;
}

.ext_cta-final-form .ext_hero-form-title {
    margin-bottom: 18px;
}

.ext_checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.ext_checkbox-label {
    font-size: 13px;
    padding: 7px 14px;
    border: 1px solid var(--ext-border);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--ext-transition);
    color: var(--ext-text-secondary);
    user-select: none;
}

.ext_checkbox-label:has(input:checked) {
    background: var(--ext-orange);
    border-color: var(--ext-orange);
    color: #fff;
}

.ext_checkbox-label input {
    display: none;
}

/* ---- Sticky mobile CTA ---- */
.ext_sticky-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: #fff;
    border-top: 1px solid var(--ext-border);
    padding: 12px 16px;
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
}

.ext_sticky-cta .ext_btn {
    width: 100%;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .ext_hero-grid {
        grid-template-columns: 1fr;
    }

    .ext_hero-form-wrap {
        position: static;
        max-width: 480px;
    }

    .ext_cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .ext_segment-card {
        grid-template-columns: 1fr;
    }

    .ext_features-grid {
        grid-template-columns: 1fr;
    }

    .ext_cta-final-inner {
        grid-template-columns: 1fr;
    }

    .ext_cta-final-form {
        max-width: 480px;
    }

    .ext_trust-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .ext_section {
        padding: 56px 0;
    }

    .ext_hero {
        padding: 72px 0 56px;
    }

    .ext_cards-grid {
        grid-template-columns: 1fr;
    }

    .ext_scenarios-grid {
        grid-template-columns: 1fr;
    }

    .ext_why-grid {
        grid-template-columns: 1fr;
    }

    .ext_pricing-factors {
        grid-template-columns: 1fr;
    }

    .ext_tabs-nav {
        gap: 2px;
        padding: 3px;
    }

    .ext_tab-btn {
        font-size: 12px;
        padding: 10px 10px;
    }

    .ext_trust-grid {
        grid-template-columns: 1fr 1fr;
    }

    .ext_trust-placeholders {
        grid-template-columns: 1fr;
    }

    .ext_sticky-cta {
        display: block;
    }

    .ext_hero-form-wrap {
        display: none;
    }

    .ext_hero .ext_btn-group {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .ext_container {
        padding: 0 16px;
    }

    .ext_hero-badges {
        flex-direction: column;
        gap: 8px;
    }

    .ext_hero-badge {
        width: fit-content;
    }

    .ext_trust-grid {
        grid-template-columns: 1fr;
    }
}