.lander-nav {
    position: fixed;
    inset: 0 0 auto 0;
    height: 74px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(14px);
    border-bottom: 2px solid var(--border-dark);
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    z-index: 1000;
}

.navbar-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: var(--accent-aqua);
    z-index: -1;
    transition: width 0.1s ease-out;
}

.lander-brand {
    font-family: var(--font-display);
    font-size: 1.45rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    color: var(--text-primary);
}

.lander-nav-links {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.lander-nav-links a {
    padding: 8px 10px;
    border-radius: var(--radius-pill);
}

.lander-nav-links a:hover {
    color: var(--text-primary);
    background: var(--bg-color);
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 144px 0 72px;
    min-height: 92vh;
    display: flex;
    align-items: center;
}

.hero-bg-grid {
    position: absolute;
    inset: 74px 0 0;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.055) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: linear-gradient(to bottom, #000 10%, transparent 92%);
    pointer-events: none;
}

.hero-layout {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
    gap: 60px;
    align-items: center;
}

.hero-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
}

.eyebrow,
.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.eyebrow {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-pill);
    padding: 8px 14px;
    color: var(--text-primary);
}

.eyebrow .material-symbols-outlined {
    font-size: 18px;
}

.hero-title {
    max-width: 760px;
    font-size: clamp(2.7rem, 6vw, 5.8rem);
    line-height: 0.98;
    letter-spacing: 0;
}

.hero-subtitle {
    max-width: 660px;
    color: var(--text-secondary);
    font-size: clamp(1.05rem, 2vw, 1.28rem);
    line-height: 1.6;
}

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

.hero-note {
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 620px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.hero-note .material-symbols-outlined {
    color: var(--text-primary);
}

.product-stage {
    position: relative;
    min-height: 520px;
}

.study-card {
    background: var(--surface-color);
    border: 2px solid var(--border-dark);
    border-radius: 22px;
}

.preview-main {
    position: absolute;
    inset: 40px 24px auto 0;
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.preview-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.preview-header h2 {
    margin-top: 4px;
    font-size: 1.55rem;
}

.preview-kicker {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 800;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.note-sheet {
    background: #fbfbfb;
    border: 2px solid var(--border-light);
    border-radius: 16px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.note-line {
    height: 12px;
    width: 82%;
    background: var(--border-light);
    border-radius: var(--radius-pill);
}

.note-line.wide {
    width: 100%;
    background: var(--accent-mint);
    border: 1px solid #b7d8ba;
}

.note-line.small {
    width: 56%;
    background: var(--accent-peach);
    border: 1px solid #f4cdbf;
}

.note-code {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: #111;
    color: #fff;
    border-radius: 12px;
    padding: 14px;
    font-family: var(--font-mono);
    font-size: 0.76rem;
}

.preview-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.preview-actions span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-color);
    border: 2px solid var(--border-light);
    border-radius: 14px;
    padding: 10px;
    font-size: 0.78rem;
    font-weight: 800;
}

.preview-actions .material-symbols-outlined {
    font-size: 18px;
}

.mini-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 250px;
    padding: 14px;
    border-color: var(--border-light);
}

.mini-card .material-symbols-outlined {
    width: 42px;
    height: 42px;
    border: 2px solid var(--border-dark);
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-aqua);
}

.mini-card p {
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.35;
}

.mini-library {
    right: 0;
    top: 0;
}

.mini-coins {
    left: 28px;
    bottom: 42px;
}

.mini-coins .material-symbols-outlined {
    background: #fff9c4;
}

.quick-strip {
    background: var(--surface-color);
    border-top: 2px solid var(--border-dark);
    border-bottom: 2px solid var(--border-dark);
}

.quick-strip-inner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border-light);
    padding: 0;
}

.quick-strip-inner div {
    background: var(--surface-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.quick-strip-inner strong {
    font-family: var(--font-display);
    font-size: 1.55rem;
}

.quick-strip-inner span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.features-section,
.tools-section,
.cta-section {
    padding: 96px 0;
}

.features-section {
    background: var(--bg-color);
}

.section-heading {
    max-width: 760px;
    margin: 0 auto 42px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.section-heading.left {
    margin: 0;
    text-align: left;
    align-items: flex-start;
}

.section-heading h2 {
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.05;
    letter-spacing: 0;
}

.section-heading p {
    color: var(--text-secondary);
    font-size: 1.04rem;
    line-height: 1.65;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.feature-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: 20px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.feature-card:hover {
    border-color: var(--border-dark);
    background: #fbfbfb;
}

.feature-icon-wrap {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    border: 2px solid var(--border-dark);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon-wrap.mint,
.subject-icon.mint {
    background: var(--accent-mint);
}

.feature-icon-wrap.aqua,
.subject-icon.aqua {
    background: var(--accent-aqua);
}

.feature-icon-wrap.peach,
.subject-icon.peach {
    background: var(--accent-peach);
}

.feature-icon-wrap.lavender,
.subject-icon.lavender {
    background: var(--accent-lavender);
}

.feature-card h3 {
    font-size: 1.05rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.55;
    font-size: 0.94rem;
}

.library-section {
    background: var(--surface-color);
    border-top: 2px solid var(--border-dark);
    border-bottom: 2px solid var(--border-dark);
    padding: 96px 0;
}

.library-layout,
.tools-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1.15fr);
    gap: 52px;
    align-items: center;
}

.subject-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.subject-row {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr) auto;
    gap: 14px;
    align-items: center;
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: 20px;
    padding: 14px;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.subject-row:hover {
    border-color: var(--border-dark);
    background: var(--bg-color);
}

.subject-icon {
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    border: 2px solid var(--border-dark);
    font-family: var(--font-mono);
    font-weight: 900;
    font-size: 0.82rem;
}

.subject-row p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 2px;
}

.tools-section {
    background: var(--bg-color);
}

.tools-panel {
    background: var(--surface-color);
    border: 2px solid var(--border-dark);
    border-radius: 22px;
    padding: 26px;
}

.tools-panel h2 {
    margin: 10px 0 22px;
    font-size: clamp(1.9rem, 4vw, 3rem);
    line-height: 1.08;
}

.tool-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tool-item {
    display: grid;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
    padding: 14px;
    border: 2px solid var(--border-light);
    border-radius: 16px;
    background: #fbfbfb;
}

.tool-item .material-symbols-outlined {
    width: 42px;
    height: 42px;
    border: 2px solid var(--border-dark);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-lavender);
}

.tool-item p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
    margin-top: 2px;
}

.workflow-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.workflow-step {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    align-items: center;
    gap: 16px;
    border: 2px solid var(--border-light);
    border-radius: 18px;
    padding: 18px;
    background: var(--surface-color);
}

.workflow-step.active {
    border-color: var(--border-dark);
    background: var(--accent-mint);
}

.workflow-step span {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 900;
}

.workflow-step p {
    font-size: 1.1rem;
    font-weight: 800;
}

.cta-section {
    padding-top: 24px;
}

.cta-box {
    background: var(--accent-aqua);
    border: 2px solid var(--border-dark);
    border-radius: 22px;
    padding: 34px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.cta-box h2 {
    margin-top: 8px;
    max-width: 760px;
    font-size: clamp(1.8rem, 4vw, 3.1rem);
    line-height: 1.08;
}

.footer {
    background: var(--surface-color);
    border-top: 2px solid var(--border-dark);
    padding: 42px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 32px;
}

.footer-brand {
    display: inline-block;
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.footer p {
    max-width: 520px;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
}

.footer-links a {
    border: 2px solid var(--border-light);
    border-radius: var(--radius-pill);
    padding: 8px 12px;
}

.footer-links a:hover {
    border-color: var(--border-dark);
}

@media (max-width: 980px) {
    .hero-layout,
    .library-layout,
    .tools-layout {
        grid-template-columns: 1fr;
    }

    .product-stage {
        min-height: 460px;
    }

    .features-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .lander-nav {
        height: 66px;
        padding: 0 14px;
    }

    .lander-nav-links {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 110px 0 50px;
    }

    .hero-layout {
        gap: 34px;
    }

    .hero-actions,
    .hero-actions .btn {
        width: 100%;
    }

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

    .product-stage {
        min-height: 0;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .preview-main,
    .mini-card {
        position: static;
        max-width: none;
        width: 100%;
    }

    .preview-main {
        order: 2;
    }

    .mini-library {
        order: 1;
    }

    .mini-coins {
        order: 3;
    }

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

    .features-section,
    .library-section,
    .tools-section,
    .cta-section {
        padding: 64px 0;
    }

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

    .subject-row {
        grid-template-columns: 54px minmax(0, 1fr);
    }

    .subject-row .badge {
        grid-column: 2;
        width: fit-content;
    }

    .cta-box,
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-links {
        justify-content: flex-start;
    }
}

@media (max-width: 430px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 2.55rem;
    }

    .eyebrow {
        align-items: flex-start;
        border-radius: 18px;
    }

    .preview-actions {
        grid-template-columns: 1fr;
    }

    .mini-card {
        max-width: none;
    }

    .quick-strip-inner div {
        padding: 18px;
    }
}