:root {
    color-scheme: light;
    --bg: #f6f7f9;
    --panel: #ffffff;
    --text: #17202a;
    --muted: #647184;
    --line: #d9dee7;
    --accent: #117a65;
    --accent-dark: #0d5f50;
    --warn: #8a5a00;
    --ink: #263445;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

button,
input,
select,
textarea {
    font: inherit;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 28px clamp(18px, 5vw, 56px);
    background: var(--panel);
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 4px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 0;
    font-size: clamp(1.45rem, 2.5vw, 2.25rem);
    line-height: 1.1;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.admin-link,
.primary-link,
.support-link {
    color: var(--accent-dark);
    font-weight: 700;
    text-decoration: none;
}

.support-link {
    min-height: 38px;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 0 12px;
    background: #fff;
    cursor: pointer;
}

.topbar-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    flex-wrap: wrap;
}

.language-select {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 700;
}

.language-select select {
    min-width: 132px;
    min-height: 38px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fff;
    color: var(--text);
    padding: 0 10px;
}

.checkout-shell,
.admin-shell,
.result-shell,
.usdt-shell {
    width: min(1120px, calc(100% - 32px));
    margin: 28px auto;
}

.checkout-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 24px;
}

.plans-band,
.checkout-band,
.result-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
}

.section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.section-head p,
.policy-band p {
    color: var(--muted);
    margin-bottom: 0;
}

.secure-note {
    flex: 0 0 auto;
    color: var(--warn);
    border: 1px solid #e0c072;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 0.82rem;
    font-weight: 700;
    background: #fff9e8;
}

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

.plan-card {
    display: grid;
    grid-template-rows: auto auto auto 1fr;
    gap: 8px;
    min-height: 210px;
    padding: 18px;
    text-align: left;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfcfd;
    color: var(--text);
    cursor: pointer;
}

.plan-card.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(17, 122, 101, 0.16);
}

.plan-duration {
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

.plan-price {
    color: var(--accent-dark);
    font-size: 1.35rem;
    font-weight: 800;
}

.plan-description {
    color: var(--muted);
    font-size: 0.92rem;
}

.checkout-form {
    display: grid;
    gap: 16px;
}

.checkout-form label {
    display: grid;
    gap: 7px;
    color: var(--ink);
    font-weight: 700;
}

.checkout-form input,
.checkout-form select,
.checkout-form textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 11px 12px;
    color: var(--text);
    background: #fff;
}

.terms-row {
    grid-template-columns: 18px 1fr;
    align-items: start;
    font-weight: 600;
    color: var(--muted);
}

.terms-row input {
    width: 18px;
    height: 18px;
    margin-top: 3px;
}

.quote-summary {
    display: grid;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #f9fbfb;
}

.quote-rows {
    display: grid;
    gap: 8px;
}

.quote-row {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    color: var(--muted);
    font-size: 0.94rem;
}

.quote-row strong {
    color: var(--text);
}

.quote-row-total {
    margin-top: 4px;
    padding-top: 10px;
    border-top: 1px solid var(--line);
    color: var(--ink);
    font-weight: 800;
}

.quote-row-total strong {
    color: var(--accent-dark);
}

.quote-message {
    margin: 0;
    color: var(--accent-dark);
    font-size: 0.92rem;
    font-weight: 700;
}

button[type="submit"],
.primary-pay-button,
.secondary-button,
.secondary-pay-button,
.support-button,
#copy-button,
#copy-license {
    min-height: 44px;
    border: 0;
    border-radius: 6px;
    padding: 0 16px;
    color: #fff;
    background: var(--accent);
    font-weight: 800;
    cursor: pointer;
}

button[type="submit"]:disabled,
.primary-pay-button:disabled,
.secondary-pay-button:disabled {
    cursor: progress;
    opacity: 0.64;
}

.secondary-button,
.secondary-pay-button,
.support-button,
#copy-button,
#copy-license {
    color: var(--accent-dark);
    background: #e8f4f1;
}

.payment-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.message {
    min-height: 24px;
    margin-bottom: 0;
    color: var(--warn);
    font-weight: 700;
}

.policy-band {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.policy-band article,
.inventory-item {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 18px;
}

.result-shell {
    max-width: 760px;
}

.license-box {
    display: grid;
    gap: 12px;
    margin-top: 22px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #f9fbfb;
}

.license-box code {
    display: block;
    overflow-wrap: anywhere;
    padding: 14px;
    border-radius: 6px;
    background: #17202a;
    color: #ffffff;
    font-size: 1rem;
}

.usdt-shell {
    max-width: 780px;
}

.usdt-payment,
.usdt-notes {
    display: grid;
    gap: 14px;
}

.usdt-row {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}

.usdt-row span,
.usdt-address-block span,
.usdt-countdown {
    color: var(--muted);
    font-weight: 700;
}

.usdt-address-block {
    display: grid;
    gap: 10px;
}

.usdt-address-block code {
    overflow-wrap: anywhere;
    padding: 14px;
    border-radius: 6px;
    background: #17202a;
    color: #ffffff;
    font-size: 0.96rem;
}

.usdt-countdown {
    margin: 0;
}

.usdt-countdown strong {
    color: var(--accent-dark);
}

.usdt-notes {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(23, 32, 42, 0.48);
}

.modal-backdrop.hidden {
    display: none;
}

.modal-panel {
    display: grid;
    gap: 14px;
    width: min(560px, 100%);
    max-height: calc(100vh - 36px);
    overflow: auto;
    padding: 22px;
    border-radius: 8px;
    background: var(--panel);
    box-shadow: 0 18px 60px rgba(23, 32, 42, 0.24);
}

.modal-panel p,
.modal-list {
    margin: 0;
    color: var(--muted);
}

.modal-list {
    display: grid;
    gap: 8px;
    padding-left: 20px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.hidden {
    display: none;
}

.admin-shell {
    display: grid;
    grid-template-columns: 390px minmax(0, 1fr);
    gap: 24px;
}

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

.inventory-item {
    display: grid;
    gap: 6px;
}

.inventory-item span {
    color: var(--accent-dark);
    font-weight: 800;
}

.inventory-item small {
    color: var(--muted);
}

footer {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto 28px;
    color: var(--muted);
}

@media (max-width: 860px) {
    .checkout-shell,
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .plan-grid,
    .policy-band,
    .inventory-grid {
        grid-template-columns: 1fr;
    }

    .topbar,
    .section-head,
    footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .topbar-actions {
        justify-content: flex-start;
        width: 100%;
    }
}