:root {
    --cyan: #a8d8d5;
    --cyan-dark: #6fa9a6;
    --cyan-soft: #e4f1ef;

    --cream: #f6f6f1;
    --white: #ffffff;

    --ink: #1e2928;
    --muted: #697573;
    --border: #dce5e2;

    --dark: #182321;

    --radius: 18px;
    --container: 1160px;
}


/* RESET */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "DM Sans", sans-serif;
    color: var(--ink);
    background: var(--cream);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}


/* NAVBAR */

.navbar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 20;
}

.nav-container {
    max-width: var(--container);
    margin: auto;
    padding: 26px 24px;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

    font-family: "Manrope", sans-serif;
    font-weight: 800;
    font-size: 18px;
    letter-spacing: 2px;
}

.logo-mark {
    width: 34px;
    height: 34px;

    display: grid;
    place-items: center;

    background: var(--ink);
    color: var(--cyan);

    border-radius: 9px;

    font-size: 16px;
}

.nav-button {
    padding: 10px 18px;

    border: 1px solid rgba(30, 41, 40, 0.2);
    border-radius: 100px;

    font-size: 13px;
    font-weight: 600;

    transition: 0.2s ease;
}

.nav-button:hover {
    background: var(--ink);
    color: white;
}


/* HERO */

.hero {
    min-height: 760px;

    display: flex;
    align-items: center;

    background:
        radial-gradient(
            circle at 75% 45%,
            rgba(168, 216, 213, 0.45),
            transparent 34%
        ),
        var(--cream);

    position: relative;
}

.hero-container {
    max-width: var(--container);
    width: 100%;

    margin: auto;
    padding: 130px 24px 80px;

    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 70px;
}

.hero-content {
    max-width: 650px;
}

.eyebrow,
.section-label,
.cta-label {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 2px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;

    margin-bottom: 22px;

    color: var(--cyan-dark);
}

.dot {
    width: 7px;
    height: 7px;

    background: var(--cyan-dark);
    border-radius: 50%;
}

h1,
h2,
h3 {
    font-family: "Manrope", sans-serif;
}

h1 {
    font-size: clamp(42px, 5.2vw, 72px);
    line-height: 1.02;
    letter-spacing: -3px;
    font-weight: 800;
}

h1 span,
h2 span {
    color: var(--cyan-dark);
}

.hero-description {
    max-width: 590px;

    margin-top: 27px;

    font-size: 17px;
    color: var(--muted);
    line-height: 1.75;
}


/* BUTTONS */

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;

    margin-top: 34px;
}

.primary-button,
.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 15px;

    min-height: 52px;
    padding: 0 22px;

    border-radius: 11px;

    font-size: 14px;
    font-weight: 700;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        background 0.2s ease;
}

.primary-button {
    background: var(--ink);
    color: white;

    box-shadow: 0 10px 30px rgba(30, 41, 40, 0.12);
}

.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 35px rgba(30, 41, 40, 0.18);
}

.primary-button span {
    font-size: 18px;
}

.secondary-button {
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.5);
}

.secondary-button:hover {
    background: white;
}


/* TRUST */

.trust-row {
    display: flex;
    align-items: center;
    gap: 20px;

    margin-top: 48px;
}

.trust-row div:not(.divider) {
    display: flex;
    flex-direction: column;
}

.trust-row strong {
    font-family: "Manrope", sans-serif;
    font-size: 21px;
}

.trust-row span {
    font-size: 11px;
    color: var(--muted);
}

.divider {
    width: 1px;
    height: 32px;
    background: var(--border);
}


/* PRODUCT MOCKUP */

.hero-product {
    position: relative;

    display: flex;
    justify-content: center;
    align-items: center;

    min-height: 500px;
}

.glow {
    position: absolute;

    width: 340px;
    height: 340px;

    background: var(--cyan);
    opacity: 0.25;

    filter: blur(80px);
    border-radius: 50%;
}

.book {
    position: relative;

    width: 310px;
    min-height: 420px;

    overflow: hidden;

    background: var(--dark);
    color: white;

    border-radius: 7px 17px 17px 7px;

    box-shadow:
        20px 25px 60px rgba(30, 41, 40, 0.22),
        -6px 0 0 rgba(0,0,0,0.12);

    transform: rotate(4deg);

    transition: transform 0.3s ease;
}

.book:hover {
    transform: rotate(1deg) translateY(-5px);
}

.book-top {
    padding: 23px 25px;

    font-size: 12px;
    font-weight: 800;
    letter-spacing: 3px;

    color: var(--cyan);
}

.book-content {
    padding: 35px 28px;
}

.book-content small {
    font-size: 9px;
    letter-spacing: 2px;
    color: #aebbb8;
}

.book-content h2 {
    margin-top: 13px;

    font-size: 33px;
    line-height: 0.95;
    letter-spacing: -1px;
}

.book-content h3 {
    margin-top: 8px;

    font-size: 22px;
    line-height: 1.05;

    color: var(--cyan);
}

.book-content p {
    margin-top: 24px;

    color: #b8c3c1;

    font-size: 12px;
    line-height: 1.7;
}

.book-line {
    width: 55px;
    height: 2px;

    margin-top: 28px;

    background: var(--cyan);
}

.book-label {
    display: block;

    margin-top: 14px;

    font-size: 7px;
    letter-spacing: 1px;
    color: #879492;
}

.watermark {
    position: absolute;

    right: -25px;
    bottom: 70px;

    font-family: "Manrope", sans-serif;
    font-size: 75px;
    font-weight: 800;

    color: rgba(168, 216, 213, 0.06);

    transform: rotate(-35deg);
}


/* GENERAL SECTIONS */

.section-container {
    max-width: var(--container);
    margin: auto;

    padding: 100px 24px;
}

.section-label {
    color: var(--cyan-dark);
    margin-bottom: 18px;
}

.problem {
    background: white;
}

.problem h2,
.inside-heading h2,
.features h2,
.audience h2 {
    max-width: 720px;

    font-size: clamp(34px, 4vw, 52px);
    line-height: 1.08;
    letter-spacing: -2px;
}

.section-intro {
    max-width: 650px;

    margin-top: 20px;

    color: var(--muted);
}


/* PROBLEM CARDS */

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;

    margin-top: 55px;
}

.problem-card {
    padding: 30px;

    border: 1px solid var(--border);
    border-radius: var(--radius);

    background: var(--cream);
}

.number {
    color: var(--cyan-dark);

    font-size: 12px;
    font-weight: 800;
}

.problem-card h3 {
    margin-top: 25px;

    font-size: 20px;
}

.problem-card p {
    margin-top: 10px;

    color: var(--muted);
    font-size: 14px;
}


/* INSIDE */

.inside {
    background: var(--cream);
}

.inside-heading {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 50px;
}

.inside-heading p {
    max-width: 390px;

    color: var(--muted);
}

.system {
    display: flex;
    align-items: stretch;

    margin-top: 60px;
}

.system-step {
    flex: 1;

    padding: 25px;

    border: 1px solid var(--border);
    background: rgba(255,255,255,0.45);

    border-radius: 15px;
}

.step-number {
    width: 34px;
    height: 34px;

    display: grid;
    place-items: center;

    border-radius: 8px;

    background: var(--cyan-soft);
    color: var(--cyan-dark);

    font-size: 11px;
    font-weight: 800;
}

.system-step h3 {
    margin-top: 20px;
    font-size: 20px;
}

.system-step p {
    margin-top: 8px;

    color: var(--muted);
    font-size: 13px;
}

.arrow {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 45px;

    color: var(--cyan-dark);
    font-size: 20px;
}


/* FEATURES */

.features {
    background: white;
}

.features-heading {
    max-width: 760px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;

    margin-top: 55px;
}

.feature-card {
    min-height: 230px;

    padding: 30px;

    border: 1px solid var(--border);
    border-radius: var(--radius);

    background: white;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(30, 41, 40, 0.07);
}

.feature-card.featured {
    background: var(--dark);
    color: white;
}

.feature-icon {
    font-size: 11px;
    font-weight: 800;

    color: var(--cyan-dark);
}

.feature-card.featured .feature-icon {
    color: var(--cyan);
}

.feature-card h3 {
    margin-top: 30px;

    font-size: 20px;
}

.feature-card p {
    margin-top: 9px;

    color: var(--muted);
    font-size: 13px;
}

.feature-card.featured p {
    color: #b8c3c1;
}


/* AUDIENCE */

.audience {
    background: var(--cream);
}

.audience-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;

    padding: 60px;

    border-radius: 25px;

    background: var(--cyan-soft);
}

.audience-list {
    display: flex;
    flex-direction: column;
    gap: 14px;

    padding-top: 20px;

    font-size: 14px;
}


/* CTA */

.cta {
    background: var(--dark);
    color: white;

    text-align: center;
}

.cta-container {
    max-width: 800px;

    margin: auto;
    padding: 110px 24px;
}

.cta-label {
    color: var(--cyan);
}

.cta h2 {
    margin-top: 18px;

    font-size: clamp(38px, 5vw, 62px);
    line-height: 1.05;
    letter-spacing: -2px;
}

.cta p {
    max-width: 570px;

    margin: 22px auto 0;

    color: #b8c3c1;
}

.cta .primary-button {
    margin-top: 35px;

    background: var(--cyan);
    color: var(--dark);
}

.primary-button.large {
    min-height: 58px;
    padding: 0 28px;
}

.cta small {
    display: block;

    margin-top: 18px;

    color: #75817f;

    font-size: 10px;
}


/* FOOTER */

footer {
    background: #121b19;
    color: white;
}

.footer-container {
    max-width: var(--container);
    margin: auto;

    padding: 35px 24px;

    display: flex;
    justify-content: space-between;
    align-items: center;

    gap: 30px;
}

.footer-brand p {
    max-width: 280px;

    margin-top: 12px;

    color: #76817f;

    font-size: 11px;
}

.footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;

    color: #66716f;

    font-size: 10px;
}


/* RESPONSIVE */

@media (max-width: 900px) {

    .hero-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .hero-content {
        max-width: 750px;
    }

    .hero-product {
        min-height: 430px;
    }

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

    .inside-heading {
        flex-direction: column;
        align-items: flex-start;
    }

    .system {
        flex-wrap: wrap;
        gap: 12px;
    }

    .system-step {
        flex: 1 1 45%;
    }

    .arrow {
        display: none;
    }

    .audience-box {
        grid-template-columns: 1fr;
    }
}


@media (max-width: 600px) {

    .nav-container {
        padding: 18px;
    }

    .nav-button {
        font-size: 11px;
        padding: 8px 13px;
    }

    .hero {
        min-height: auto;
    }

    .hero-container {
        padding: 120px 20px 60px;
    }

    h1 {
        font-size: 43px;
        letter-spacing: -2px;
    }

    .hero-description {
        font-size: 15px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .primary-button,
    .secondary-button {
        width: 100%;
    }

    .trust-row {
        gap: 12px;
    }

    .trust-row strong {
        font-size: 17px;
    }

    .trust-row span {
        font-size: 9px;
    }

    .book {
        width: 270px;
        min-height: 380px;
    }

    .section-container {
        padding: 75px 20px;
    }

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

    .problem-card {
        min-height: 190px;
    }

    .system-step {
        flex: 1 1 100%;
    }

    .audience-box {
        padding: 35px 25px;
    }

    .cta-container {
        padding: 80px 20px;
    }

    .cta h2 {
        font-size: 40px;
    }

    .footer-container {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-right {
        align-items: flex-start;
    }
}


/* ACCESSIBILITY */

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition: none !important;
    }
  }