:root {
    --bg: #f7f4ee;
    --panel: #fbfaf6;
    --panel-strong: #ffffff;
    --text: #1f221f;
    --muted: #5f665f;
    --line: #ece7dc;
    --brand: #13733d;
    --brand-dark: #0f5b31;
    --brand-soft: #e4f1e8;
    --accent: #6d6bf5;
    --shadow: 0 20px 50px rgba(25, 39, 28, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at top right, rgba(109, 107, 245, 0.07), transparent 24%),
        radial-gradient(circle at bottom left, rgba(19, 115, 61, 0.08), transparent 28%),
        var(--bg);
    color: var(--text);
    font-family: "Manrope", sans-serif;
}

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

.page-shell {
    min-height: 100vh;
    margin: 12px;
    padding: 12px 20px 24px;
    border: 4px solid var(--accent);
    border-radius: 16px;
    background: rgba(251, 250, 246, 0.94);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.topbar,
.footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 8px 4px 18px;
    border-bottom: 1px solid var(--line);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 18px;
}

.footer {
    margin-top: auto;
    padding: 18px 4px 6px;
    border-bottom: 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-family: "Space Mono", monospace;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.footer-links {
    display: flex;
    gap: 18px;
}

.brand {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--brand);
}

.nav {
    display: flex;
    gap: 22px;
}

.nav-link {
    padding-bottom: 8px;
    color: #6e6e6e;
    font-size: 0.95rem;
    font-weight: 700;
    border-bottom: 2px solid transparent;
}

.nav-link.active {
    color: var(--brand);
    border-color: var(--brand);
}

.language-form {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-family: "Space Mono", monospace;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.language-form select {
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--panel-strong);
    color: var(--text);
    font: inherit;
    text-transform: none;
    letter-spacing: normal;
}

main {
    flex: 1;
    display: flex;
}

.hero,
.calculator-page {
    width: 100%;
}

.hero {
    max-width: 760px;
    margin: auto;
    padding: 48px 0 64px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    margin-bottom: 28px;
    padding: 7px 14px;
    border-radius: 999px;
    background: #ece8de;
    color: #6f756c;
    font-family: "Space Mono", monospace;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.hero-title {
    margin: 0;
    font-size: clamp(3rem, 8vw, 5.4rem);
    line-height: 0.96;
    font-weight: 800;
}

.hero-title span {
    display: block;
    color: var(--brand);
}

.hero-copy,
.hero-subcopy {
    max-width: 650px;
    margin: 24px auto 0;
    color: #444b44;
    font-size: clamp(1.2rem, 2.2vw, 1.9rem);
    line-height: 1.35;
}

.hero-subcopy {
    max-width: 720px;
    margin-top: 40px;
    font-size: 1.45rem;
    color: #565d56;
}

.waitlist-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    max-width: 610px;
    margin: 36px auto 16px;
}

.waitlist-form input,
.field input {
    width: 100%;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--panel-strong);
    color: var(--text);
    font: inherit;
}

.waitlist-form button,
.primary-button,
.ghost-button {
    border: 0;
    border-radius: 10px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.waitlist-form button,
.primary-button {
    padding: 18px 24px;
    background: var(--brand);
    color: white;
    box-shadow: 0 12px 24px rgba(19, 115, 61, 0.2);
}

.hero-note {
    margin: 18px 0 0;
    color: #8d8f88;
    font-family: "Space Mono", monospace;
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.waitlist-message {
    margin: 10px 0 0;
    font-weight: 700;
}

.waitlist-message.success {
    color: var(--brand);
}

.waitlist-message.error {
    color: #a4511f;
}

.waitlist-message.info {
    color: #6e6e6e;
}

.calculator-page {
    padding: 42px 0 36px;
}

.section-heading {
    max-width: 820px;
    margin-bottom: 28px;
}

.section-heading h1 {
    margin: 0 0 12px;
    font-size: clamp(2.4rem, 5vw, 4rem);
    line-height: 1;
}

.section-heading p {
    margin: 0;
    max-width: 720px;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.6;
}

.calculator-grid {
    display: grid;
    grid-template-columns: minmax(320px, 1.02fr) minmax(320px, 1fr);
    gap: 24px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 28px;
    box-shadow: var(--shadow);
}

.card h2,
.card h3 {
    margin: 0 0 18px;
}

.field-grid {
    display: grid;
    gap: 16px;
}

.field {
    display: grid;
    gap: 8px;
}

.field span {
    font-size: 0.95rem;
    font-weight: 700;
}

.field input:focus,
.waitlist-form input:focus,
.language-form select:focus {
    outline: 2px solid rgba(109, 107, 245, 0.18);
    border-color: rgba(19, 115, 61, 0.28);
}

.assumptions {
    margin-top: 22px;
    padding: 18px;
    border-radius: 18px;
    background: var(--brand-soft);
}

.assumptions ul {
    margin: 0;
    padding-left: 18px;
    color: #365140;
}

.actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.ghost-button {
    padding: 18px 24px;
    background: transparent;
    color: var(--brand-dark);
    border: 1px solid rgba(19, 115, 61, 0.16);
}

.validation-message {
    min-height: 24px;
    margin: 14px 0 0;
    color: #8b4b14;
    font-weight: 700;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.result-box,
.plan-panel,
.summary-panel {
    border-radius: 20px;
    border: 1px solid var(--line);
    background: var(--panel-strong);
}

.result-box {
    padding: 18px;
    display: grid;
    gap: 10px;
}

.result-box span {
    color: var(--muted);
    font-weight: 700;
    font-size: 0.92rem;
}

.result-box strong {
    font-size: 1.8rem;
    line-height: 1.05;
}

.result-box.highlight {
    background: linear-gradient(135deg, #13733d, #1f8c4f);
    color: white;
}

.result-box.highlight span {
    color: rgba(255, 255, 255, 0.86);
}

.plan-panel,
.summary-panel {
    margin-top: 18px;
    padding: 18px;
}

.plan-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: baseline;
    margin-bottom: 14px;
}

.plan-header span {
    color: var(--brand);
    font-weight: 800;
}

.year-plan {
    display: grid;
    gap: 10px;
}

.year-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 16px;
    border-radius: 16px;
    background: #f4f8f4;
}

.year-item strong {
    font-size: 1rem;
}

.plan-note,
.summary-panel p {
    margin: 14px 0 0;
    color: var(--muted);
    line-height: 1.6;
}

.legal-caption {
    font-size: 0.95rem;
}

.legal-caption a,
.legal-details summary {
    color: var(--brand);
    font-weight: 700;
}

.legal-details {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
}

.legal-details summary {
    cursor: pointer;
    list-style: none;
}

.legal-details summary::-webkit-details-marker {
    display: none;
}

.legal-details-body p:first-child {
    margin-top: 14px;
}

@media (max-width: 900px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }

    .waitlist-form {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .page-shell {
        margin: 0;
        min-height: 100vh;
        border-width: 0 0 4px;
        border-radius: 0;
        padding: 10px 14px 18px;
    }

    .topbar,
    .footer,
    .plan-header,
    .year-item,
    .actions,
    .topbar-actions,
    .language-form {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav {
        gap: 16px;
    }

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

    .hero {
        padding: 28px 0 40px;
    }

    .hero-copy,
    .hero-subcopy {
        font-size: 1.1rem;
    }
}