*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #F8FAFC;
    --surface: #FFFFFF;
    --surface-2: #F1F5F9;
    --border: #E2E8F0;
    --border-2: #CBD5E1;
    --text-1: #0F172A;
    --text-2: #475569;
    --text-3: #94A3B8;
    --blue: #2563EB;
    --blue-dark: #1D4ED8;
    --blue-light: #EFF6FF;
    --blue-mid: #BFDBFE;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text-2);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1060px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── NAV ── */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(248, 250, 252, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1060px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 9px;
    text-decoration: none;
}

.logo-mark {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: var(--blue-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-text {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-1);
    letter-spacing: -0.4px;
}

.nav-cta {
    padding: 7px 16px;
    background: var(--blue-dark);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 13.5px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.15s;
}

.nav-cta:hover {
    background: #1e40af;
}

/* ── HERO ── */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: var(--bg);
}

.badge {
    display: inline-block;
    padding: 5px 14px;
    background: var(--blue-light);
    border: 1px solid var(--blue-mid);
    border-radius: 100px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--blue);
    letter-spacing: 0.3px;
    margin-bottom: 28px;
}

.headline {
    font-size: clamp(36px, 6vw, 62px);
    font-weight: 800;
    color: var(--text-1);
    letter-spacing: -1.5px;
    line-height: 1.1;
    margin-bottom: 22px;
}

.headline-accent {
    color: var(--blue);
}

.subheadline {
    font-size: clamp(16px, 2vw, 19px);
    color: var(--text-2);
    max-width: 580px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

/* ── FORM ── */
.signup-form {
    max-width: 520px;
    margin: 0 auto;
}

.form {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.email-input {
    flex: 1;
    padding: 13px 16px;
    background: var(--surface);
    border: 1.5px solid var(--border-2);
    border-radius: var(--radius-sm);
    color: var(--text-1);
    font-family: inherit;
    font-size: 15px;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.email-input::placeholder {
    color: var(--text-3);
}

.email-input:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.submit-btn {
    padding: 13px 22px;
    background: var(--blue-dark);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s;
}

.submit-btn:hover {
    background: #1e40af;
}

.form-note {
    font-size: 12.5px;
    color: var(--text-3);
    text-align: center;
}

/* ── SOCIAL PROOF ── */
.social-proof {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 28px;
}

.proof-avatars {
    display: flex;
}

.avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    margin-left: -8px;
}

.proof-avatars .avatar:first-child {
    margin-left: 0;
}

.proof-text {
    font-size: 13.5px;
    color: var(--text-2);
}

.proof-text strong {
    color: var(--text-1);
    font-weight: 600;
}

/* ── PREVIEW ── */
.preview {
    padding: 0 0 100px;
}

.preview-label {
    text-align: center;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--text-3);
    letter-spacing: 0.8px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.preview-frame {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.1), 0 4px 16px rgba(15, 23, 42, 0.06);
}

.preview-desktop {
    width: 100%;
    display: block;
    border-radius: var(--radius-lg);
}

.preview-mobile {
    display: none;
}

/* ── PROBLEM ── */
.problem {
    padding: 100px 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-title {
    font-size: clamp(26px, 4vw, 38px);
    font-weight: 800;
    color: var(--text-1);
    letter-spacing: -0.8px;
    text-align: center;
    margin-bottom: 16px;
}

.section-sub {
    text-align: center;
    font-size: 17px;
    color: var(--text-2);
    max-width: 540px;
    margin: 0 auto 52px;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.problem-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
}

.problem-icon {
    font-size: 24px;
    margin-bottom: 14px;
}

.problem-card p {
    font-size: 15px;
    color: var(--text-2);
    line-height: 1.6;
    font-style: italic;
}

.problem-stat {
    background: #FEF2F2;
    border: 1px solid #FECACA;
    border-radius: var(--radius-md);
    padding: 20px 24px;
    font-size: 15px;
    color: #991B1B;
    text-align: center;
    line-height: 1.6;
    max-width: 680px;
    margin: 0 auto;
}

/* ── FEATURES ── */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 52px;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: box-shadow 0.15s, border-color 0.15s;
}

.feature-card:hover {
    border-color: var(--border-2);
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
}

.feature-icon-wrap {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 8px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.6;
}

/* ── PRICING ── */
.pricing {
    padding: 100px 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.pricing-card {
    max-width: 480px;
    margin: 52px auto 0;
    background: var(--bg);
    border: 1.5px solid var(--blue-mid);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: left;
    box-shadow: 0 4px 24px rgba(37, 99, 235, 0.08);
}

.pricing-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 20px;
}

.pricing-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 4px;
}

.pricing-desc {
    font-size: 13.5px;
    color: var(--text-2);
}

.pricing-amount {
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.price {
    font-size: 38px;
    font-weight: 800;
    color: var(--text-1);
    letter-spacing: -1px;
}

.price-period {
    font-size: 15px;
    color: var(--text-2);
}

.pricing-divider {
    height: 1px;
    background: var(--border);
    margin-bottom: 20px;
}

.pricing-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.pricing-features li {
    font-size: 14.5px;
    color: var(--text-2);
    padding-left: 22px;
    position: relative;
}

.pricing-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #16A34A;
    font-weight: 700;
}

.pricing-note {
    font-size: 12.5px;
    color: var(--blue);
    font-weight: 500;
}

/* ── DIFFERENTIATOR ── */
.differentiator {
    padding: 60px 0;
    background: var(--bg);
}

.diff-card {
    max-width: 680px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--blue);
    border-radius: var(--radius-md);
    padding: 28px 32px;
}

.diff-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: 0.8px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.diff-text {
    font-size: 15.5px;
    color: var(--text-2);
    line-height: 1.7;
}

/* ── FAQ ── */
.faq {
    padding: 100px 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.faq-list {
    max-width: 720px;
    margin: 52px auto 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.faq-item {
    padding: 22px 0;
    border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-q {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 10px;
    line-height: 1.4;
}

.faq-a {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.7;
}

/* ── BOTTOM CTA ── */
.bottom-cta {
    padding: 100px 0;
    background: var(--blue-dark);
    text-align: center;
}

.bottom-cta .headline-accent {
    color: #93C5FD;
}

.cta-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    color: #fff;
    letter-spacing: -1px;
    line-height: 1.2;
    margin-bottom: 40px;
}

.bottom-cta .email-input {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.bottom-cta .email-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.bottom-cta .email-input:focus {
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.bottom-cta .submit-btn {
    background: #fff;
    color: var(--blue-dark);
}

.bottom-cta .submit-btn:hover {
    background: #F1F5F9;
}

.bottom-cta .form-note {
    color: rgba(255, 255, 255, 0.5);
}

/* ── FOOTER ── */
.footer {
    padding: 32px 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-note {
    font-size: 13px;
    color: var(--text-3);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .hero {
        padding: 70px 0 60px;
    }

    .form {
        flex-direction: column;
    }

    .submit-btn {
        width: 100%;
    }

    .preview-desktop {
        display: none;
    }

    .preview-mobile {
        display: block;
        width: 100%;
        border-radius: var(--radius-lg);
    }

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

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

    .footer-inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .pricing-card {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .headline {
        letter-spacing: -0.8px;
    }

    .social-proof {
        flex-direction: column;
        gap: 8px;
    }
}