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

:root {
    --blue: #2563EB;
    --blue-dark: #1D4ED8;
    --blue-light: #EFF6FF;
    --text: #111827;
    --text-secondary: #6B7280;
    --bg: #FFFFFF;
    --bg-alt: #F9FAFB;
    --border: #E5E7EB;
    --radius: 12px;
    --radius-sm: 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);
    --transition: 0.2s ease;
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.required { color: #EF4444; }

/* === Button === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--blue);
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    white-space: nowrap;
}
.btn:hover { background: var(--blue-dark); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--sm { padding: 8px 20px; font-size: 0.875rem; }
.btn--lg { padding: 16px 36px; font-size: 1.0625rem; }
.btn--white { background: #fff; color: var(--blue); }
.btn--white:hover { background: #F0F4FF; }

/* === Header === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    height: 72px;
}

.header__inner {
    display: flex;
    align-items: center;
    height: 72px;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo__text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

.header__nav {
    display: flex;
    gap: 28px;
    margin-left: auto;
}

.header__nav a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
}

.header__nav a:hover { color: var(--blue); }

.header .btn--sm { margin-left: 16px; }

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    margin-left: auto;
}

.burger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 99;
    padding: 24px;
}

.mobile-menu nav {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-menu a {
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--text);
}

.mobile-menu .btn { margin-top: 8px; text-align: center; }

.mobile-menu.is-open { display: block; }

/* === Hero === */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--blue-light) 0%, var(--bg) 100%);
}

.hero__content { max-width: 720px; margin: 0 auto; text-align: center; }

.hero__badge {
    display: inline-block;
    background: rgba(37,99,235,0.1);
    color: var(--blue);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 24px;
}

.hero__title {
    font-size: 3rem;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.hero__subtitle {
    font-size: 1.1875rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero__cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.hero__note {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero__trust {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* === Partners === */
.partners {
    padding: 48px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

.partners__label {
    text-align: center;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-weight: 500;
}

.partners__logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    opacity: 0.6;
}

/* === Benefits === */
.benefits {
    padding: 96px 0;
}

.benefits__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.benefit-card {
    padding: 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: box-shadow var(--transition), transform var(--transition);
}

.benefit-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.benefit-card__icon { margin-bottom: 16px; }

.benefit-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* === How It Works === */
.how-it-works {
    padding: 96px 0;
    background: var(--bg-alt);
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.step { text-align: center; }

.step__number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--blue);
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step h3 {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.step p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* === Calculator === */
.calculator {
    padding: 96px 0;
}

.calc-card {
    max-width: 680px;
    margin: 0 auto;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.calc-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

.calc-btn { grid-column: 1 / -1; }

.calc-field label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text);
}

.calc-field input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition);
}

.calc-field input:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.calc-results {
    display: grid;
    gap: 16px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s, transform 0.4s;
}

.calc-results.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.calc-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    background: var(--bg-alt);
}

.calc-result__label {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.calc-result__value {
    font-size: 1.25rem;
    font-weight: 700;
}

.calc-result--highlight {
    background: var(--blue-light);
    border: 1px solid rgba(37,99,235,0.15);
}

.calc-result--highlight .calc-result__value { color: var(--blue); }

.calc-result--gain { background: #ECFDF5; }
.calc-result--gain .calc-result__value { color: #059669; }

/* === Results === */
.results {
    padding: 96px 0;
    background: var(--bg-alt);
}

.results__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.result-card {
    padding: 32px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: box-shadow var(--transition);
}

.result-card:hover { box-shadow: var(--shadow-lg); }

.result-card__metric {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--blue);
    margin-bottom: 4px;
}

.result-card__label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.result-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.result-card__tag {
    display: inline-block;
    background: var(--blue-light);
    color: var(--blue);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 100px;
}

/* === FAQ === */
.faq {
    padding: 96px 0;
}

.faq__list {
    max-width: 720px;
    margin: 0 auto;
}

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

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

.faq-item__question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    background: none;
    border: none;
    font-size: 1.0625rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text);
    cursor: pointer;
    text-align: left;
    gap: 16px;
}

.faq-item__chevron {
    flex-shrink: 0;
    transition: transform 0.3s;
}

.faq-item.is-open .faq-item__chevron { transform: rotate(180deg); }

.faq-item__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item__answer p {
    padding-bottom: 20px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* === Contact / Lead Form === */
.contact {
    padding: 96px 0;
    background: var(--bg-alt);
}

.contact__inner {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.lead-form {
    text-align: left;
    margin-top: 32px;
}

.lead-form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.lead-form__field label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
}

.lead-form__field input,
.lead-form__field select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg);
    transition: border-color var(--transition);
    color: var(--text);
}

.lead-form__field input:focus,
.lead-form__field select:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.lead-form__field input.is-error,
.lead-form__field select.is-error {
    border-color: #EF4444;
    box-shadow: 0 0 0 3px rgba(239,68,68,0.1);
}

.lead-form__submit {
    width: 100%;
    margin-top: 8px;
}

.lead-form__note {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 12px;
}

.lead-form__success {
    padding: 40px 20px;
    text-align: center;
}

.lead-form__success svg { margin: 0 auto 16px; }

.lead-form__success h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.lead-form__success p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* === Final CTA === */
.final-cta {
    padding: 80px 0;
    background: var(--blue);
    color: #fff;
    text-align: center;
}

.final-cta h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.final-cta p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

/* === Footer === */
.footer {
    padding: 48px 0 24px;
    background: var(--text);
    color: #D1D5DB;
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}

.footer__brand { max-width: 320px; }

.footer__brand .logo__text { color: #fff; }

.footer__brand p {
    margin-top: 12px;
    font-size: 0.875rem;
    line-height: 1.6;
}

.footer__links { display: flex; flex-direction: column; gap: 10px; }

.footer__links h4 {
    color: #fff;
    font-size: 0.875rem;
    margin-bottom: 4px;
}

.footer__links a {
    font-size: 0.875rem;
    color: #9CA3AF;
    transition: color var(--transition);
}

.footer__links a:hover { color: #fff; }

.footer__bottom {
    border-top: 1px solid #374151;
    padding-top: 24px;
}

.footer__bottom p {
    font-size: 0.8125rem;
    color: #6B7280;
}

/* === Animations === */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 768px) {
    .header__nav,
    .header .btn--sm { display: none; }
    .burger { display: flex; }

    .hero { padding: 120px 0 60px; }
    .hero__title { font-size: 2rem; }
    .hero__subtitle { font-size: 1rem; }
    .hero__cta { flex-direction: column; }
    .hero__trust { flex-direction: column; align-items: center; gap: 12px; }

    .benefits__grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .results__grid { grid-template-columns: 1fr; }

    .calc-inputs { grid-template-columns: 1fr; }

    .lead-form__row { grid-template-columns: 1fr; }

    .section-title { font-size: 1.625rem; }
    .section-subtitle { font-size: 1rem; }

    .footer__inner { flex-direction: column; gap: 24px; }

    .partners__logos { gap: 20px; }
}

@media (max-width: 480px) {
    .hero__title { font-size: 1.75rem; }
    .steps { grid-template-columns: 1fr; }
    .result-card__metric { font-size: 2rem; }
    .final-cta h2 { font-size: 1.5rem; }
}