:root {
    --brand-primary: #1e8103;
    --brand-primary-dark: #166534;
    --brand-secondary: #b7d5b9;
    --green-50: #f0fdf4;
    --green-100: #dcfce7;
    --green-900: #14532d;
    --bg: #ffffff;
    --bg-subtle: #f9fafb;
    --surface: #ffffff;
    --surface-alt: #f8fafc;
    --border: #e5e7eb;
    --border-strong: #cbd5e1;
    --fg: #111827;
    --fg-muted: #4b5563;
    --fg-subtle: #6b7280;
    --danger: #b42318;
    --danger-bg: #fef3f2;
    --info-bg: #f0f9ff;
    --info-fg: #075985;
    --warn-bg: #fffbeb;
    --warn-fg: #92400e;
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 16px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --font-sans: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--bg-subtle);
    color: var(--fg);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.5;
}

a {
    color: var(--brand-primary-dark);
}

h1,
h2,
h3 {
    margin: 0;
    color: var(--fg);
}

[hidden] {
    display: none !important;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* demo banner */
.demo-banner {
    background: var(--warn-bg);
    color: var(--warn-fg);
    font-size: 13px;
    text-align: center;
    padding: 8px 16px;
    border-bottom: 1px solid #fde68a;
}

/* header */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px clamp(16px, 4vw, 40px);
    background: linear-gradient(90deg, var(--brand-primary-dark), var(--brand-primary) 70%, #4a9d2f);
    color: #fff;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: var(--r-sm);
    background: rgba(255, 255, 255, 0.18);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
    color: #fff;
}

.brand-name {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.01em;
}

.brand-sub {
    font-size: 13px;
    opacity: 0.9;
}

.bank-chip {
    background: rgba(255, 255, 255, 0.18);
    padding: 6px 14px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 14px;
}

/* layout */
.ots-body {
    flex: 1;
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 24px;
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 28px clamp(16px, 4vw, 40px) 40px;
    align-items: start;
}

.stepper {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 18px;
    box-shadow: var(--shadow-sm);
}

.stepper ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--r-sm);
    color: var(--fg-subtle);
    font-size: 14px;
}

.step.active {
    background: var(--green-100);
    color: var(--green-900);
    font-weight: 600;
}

.step.done {
    color: var(--brand-primary-dark);
}

.step-num {
    flex: none;
    display: grid;
    place-items: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1.5px solid currentColor;
    font-size: 13px;
    font-weight: 700;
}

.step.active .step-num {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: #fff;
}

.helpdesk {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 13px;
    color: var(--fg-muted);
}

.helpdesk strong {
    color: var(--fg);
}

.helpdesk-mail {
    overflow-wrap: anywhere;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: clamp(18px, 3vw, 32px);
    box-shadow: var(--shadow-sm);
    min-width: 0;
}

.panel-title {
    font-size: 22px;
    margin-bottom: 6px;
}

.panel-title.ok {
    color: var(--brand-primary-dark);
}

.panel-title.bad {
    color: var(--danger);
}

.panel-sub {
    color: var(--fg-muted);
    margin: 0 0 18px;
}

.note {
    color: var(--fg-subtle);
    font-size: 13px;
    margin: 14px 0 0;
}

.hint {
    color: var(--fg-subtle);
    font-size: 13px;
}

/* forms */
.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
    max-width: 420px;
}

.field label {
    font-weight: 600;
    font-size: 14px;
}

input,
select {
    font: inherit;
    padding: 10px 12px;
    border: 1px solid var(--border-strong);
    border-radius: var(--r-sm);
    background: #fff;
    color: var(--fg);
    min-height: 42px;
}

input:focus,
select:focus,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

input:disabled {
    background: var(--surface-alt);
    color: var(--fg-muted);
}

/* dropdowns are sized to their content, never the container */
select {
    width: auto;
    max-width: 100%;
    align-self: flex-start;
}

.amount-input {
    width: 170px;
    text-align: right;
}

.captcha-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.captcha-row input {
    width: 150px;
}

.captcha {
    border: 1px solid var(--border-strong);
    border-radius: var(--r-sm);
    background: var(--green-50);
}

.icon-btn {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--border-strong);
    border-radius: var(--r-sm);
    background: #fff;
    color: var(--brand-primary-dark);
    cursor: pointer;
}

.otp-block {
    margin-top: 6px;
    padding-top: 14px;
    border-top: 1px dashed var(--border-strong);
}

/* buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font: inherit;
    font-weight: 600;
    padding: 10px 20px;
    min-height: 42px;
    border-radius: var(--r-sm);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
}

.btn.primary {
    background: var(--brand-primary);
    color: #fff;
}

.btn.primary:hover {
    background: var(--brand-primary-dark);
}

.btn.secondary {
    background: var(--green-50);
    color: var(--brand-primary-dark);
    border-color: var(--brand-secondary);
}

.btn.secondary:hover {
    background: var(--green-100);
}

.btn.link {
    background: none;
    color: var(--brand-primary-dark);
    padding-left: 8px;
    padding-right: 8px;
    text-decoration: underline;
}

.btn.danger {
    color: var(--danger);
}

.btn.block {
    width: 100%;
}

.actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
}

.actions.wrap {
    flex-wrap: wrap;
}

/* alerts */
.alert {
    border-radius: var(--r-sm);
    padding: 11px 14px;
    margin: 0 0 14px;
    font-size: 14px;
    border: 1px solid transparent;
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: #fecdca;
}

.alert-success {
    background: var(--green-50);
    color: var(--green-900);
    border-color: var(--brand-secondary);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info-fg);
    border-color: #bae6fd;
}

/* tables */
.table-wrap {
    overflow-x: auto;
    margin-bottom: 8px;
}

table.grid {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

table.grid th,
table.grid td {
    border: 1px solid var(--border);
    padding: 9px 12px;
    text-align: left;
    vertical-align: top;
}

table.grid th {
    background: var(--green-50);
    color: var(--green-900);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

table.grid.compact td,
table.grid.compact th {
    padding: 7px 10px;
    font-size: 13px;
}

.num {
    text-align: right !important;
    font-variant-numeric: tabular-nums;
}

tr.clickable {
    cursor: pointer;
}

tr.clickable:hover {
    background: var(--green-50);
}

.demo-panel {
    margin-top: 22px;
    border: 1px dashed var(--brand-secondary);
    border-radius: var(--r-md);
    padding: 10px 14px;
    background: var(--surface-alt);
    overflow-x: auto;
}

.demo-panel summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--brand-primary-dark);
    margin-bottom: 8px;
}

.notes {
    color: var(--fg-muted);
    font-size: 14px;
    padding-left: 20px;
}

.badge {
    display: inline-block;
    margin-left: 6px;
    padding: 2px 10px;
    border-radius: 999px;
    background: var(--green-100);
    color: var(--green-900);
    font-size: 12px;
    font-weight: 600;
}

/* status */
.status-card {
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 6px 18px;
    max-width: 560px;
    margin-bottom: 8px;
}

.status-line {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 9px 0;
    border-bottom: 1px solid var(--border-subtle, #f1f5f9);
}

.status-line:last-child {
    border-bottom: 0;
}

.status-key {
    color: var(--fg-subtle);
}

/* SMS phone */
.sms-host {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 50;
    max-width: calc(100vw - 32px);
}

.sms-phone {
    width: 320px;
    max-width: 100%;
    background: #fff;
    border: 1px solid var(--border-strong);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.sms-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    background: var(--brand-primary-dark);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
}

.sms-head span {
    flex: 1;
}

.sms-close {
    background: none;
    border: 0;
    color: #fff;
    cursor: pointer;
    display: grid;
}

.sms-msg {
    padding: 10px 12px;
    border-top: 1px solid var(--border);
}

.sms-meta {
    color: var(--fg-subtle);
    font-size: 12px;
}

.sms-body {
    font-size: 14px;
    margin-top: 2px;
}

/* footer */
.site-footer {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    padding: 18px 16px 26px;
    color: var(--fg-subtle);
    font-size: 13px;
}

/* bank website stand-in */
.bank-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 14px clamp(16px, 4vw, 40px);
    background: #fff;
    border-bottom: 1px solid var(--border);
}

.bank-brand {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.bank-brand strong {
    font-size: 20px;
    color: var(--brand-primary-dark);
}

.bank-brand span {
    font-size: 12px;
    color: var(--fg-subtle);
}

.bank-nav {
    display: flex;
    align-items: center;
    gap: 22px;
    flex-wrap: wrap;
    font-size: 13px;
    font-weight: 600;
}

.bank-nav-link {
    color: var(--fg-muted);
}

.bank-nav-drop {
    position: relative;
}

.bank-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font: inherit;
    font-weight: 700;
    color: var(--brand-primary-dark);
    background: none;
    border: 0;
    cursor: pointer;
    padding: 4px 0;
}

.bank-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 10;
    min-width: 260px;
    margin-top: 8px;
    padding: 14px 16px;
    background: var(--brand-primary-dark);
    border-radius: var(--r-md);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bank-menu-title {
    color: #fff;
    font-size: 12px;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}

.bank-menu-item {
    color: #fff;
    text-decoration: none;
    padding: 8px 10px;
    border-radius: var(--r-sm);
    font-weight: 500;
    display: flex;
    flex-direction: column;
}

.bank-menu-item.muted {
    opacity: 0.75;
}

.bank-menu-item.active {
    background: rgba(255, 255, 255, 0.18);
}

.bank-menu-tip {
    font-size: 12px;
    opacity: 0.85;
    font-weight: 400;
}

.bank-hero {
    flex: 1;
    max-width: 760px;
    margin: 0 auto;
    padding: 64px 20px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
}

.bank-hero h1 {
    font-size: clamp(28px, 5vw, 42px);
    line-height: 1.15;
}

.bank-hero p {
    color: var(--fg-muted);
    font-size: 17px;
    margin: 0;
}

/* payment gateway */
.gw-page {
    min-height: 100vh;
    display: grid;
    place-items: start center;
    padding: 28px 16px;
    background: var(--surface-alt);
}

.gw-card {
    width: 100%;
    max-width: 400px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.gw-summary {
    background: linear-gradient(160deg, var(--brand-primary-dark), var(--brand-primary));
    color: #fff;
    padding: 18px;
}

.gw-merchant {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.gw-logo {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: #fff;
    color: var(--brand-primary-dark);
    font-weight: 800;
    font-size: 13px;
}

.gw-payer {
    font-size: 14px;
    margin-bottom: 10px;
}

.gw-contact {
    font-size: 12px;
    opacity: 0.85;
}

.gw-line {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    padding: 3px 0;
}

.gw-total {
    margin-top: 6px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.35);
    font-weight: 700;
    font-size: 16px;
}

.gw-body {
    padding: 16px 16px 8px;
}

.gw-choose {
    font-size: 16px;
    margin-bottom: 10px;
}

.gw-mode-wrap {
    border-bottom: 1px solid var(--border);
}

.gw-mode {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 13px 4px;
    background: none;
    border: 0;
    font: inherit;
    cursor: pointer;
    color: var(--fg);
    text-align: left;
}

.gw-mode span {
    flex: 1;
}

.gw-mode[aria-expanded='true'] svg:last-child {
    transform: rotate(90deg);
}

.gw-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 4px 4px 16px;
}

.gw-form input,
.gw-form select {
    width: 100%;
}

.gw-two {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.gw-hint {
    margin: 0;
    font-size: 12px;
    color: var(--fg-subtle);
}

.gw-qr {
    align-self: center;
    border: 1px solid var(--border-strong);
    border-radius: var(--r-sm);
}

.gw-error {
    color: var(--danger);
    font-size: 13px;
    min-height: 18px;
    padding: 8px 4px 0;
}

.gw-cancel {
    margin: 4px auto 8px;
    display: flex;
}

.gw-foot {
    text-align: center;
    padding: 10px;
    font-size: 12px;
    color: var(--fg-subtle);
    background: var(--surface-alt);
    border-top: 1px solid var(--border);
}

/* letters */
.letter {
    margin-top: 22px;
    padding: 36px clamp(18px, 4vw, 48px);
    border: 1px solid var(--border-strong);
    background: #fff;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 14px;
    line-height: 1.55;
    max-width: 820px;
}

.letter p {
    margin: 0 0 12px;
}

.letter-brand {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 2px solid var(--brand-primary);
    padding-bottom: 8px;
    margin-bottom: 14px;
}

.letter-brand strong {
    font-family: var(--font-sans);
    font-size: 18px;
    color: var(--brand-primary-dark);
}

.letter-brand span {
    font-family: var(--font-sans);
    font-size: 11px;
    color: var(--fg-subtle);
}

.letter-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 13px;
}

.letter-wp {
    text-align: right;
    font-weight: 700;
    text-decoration: underline;
}

.letter-title {
    text-align: center;
    font-family: var(--font-sans);
    font-size: 15px;
    text-decoration: underline;
    margin: 14px 0;
}

.letter-table {
    width: 100%;
    border-collapse: collapse;
    margin: 6px 0 14px;
    font-size: 12.5px;
}

.letter-table th,
.letter-table td {
    border: 1px solid #333;
    padding: 5px 8px;
    text-align: left;
}

.letter-terms {
    padding-left: 22px;
    font-size: 13px;
}

.letter-terms li {
    margin-bottom: 8px;
}

.letter-foot {
    font-size: 12.5px;
    font-weight: 700;
}

/* admin */
.admin-main {
    flex: 1;
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px clamp(16px, 4vw, 40px) 40px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    align-content: start;
}

.admin-main > .alert,
.admin-main > .actions {
    grid-column: 1 / -1;
}

.admin-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    min-width: 0;
}

.admin-card.wide {
    grid-column: 1 / -1;
}

.admin-card h2 {
    font-size: 17px;
    margin-bottom: 8px;
}

ul.plain {
    margin: 10px 0 0;
    padding-left: 18px;
    color: var(--fg-muted);
    font-size: 13px;
}

.txn {
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    padding: 8px 12px;
    margin-bottom: 8px;
}

.txn summary {
    cursor: pointer;
}

.trail {
    margin: 10px 0 4px;
    padding-left: 18px;
    font-size: 13px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.trail li {
    display: grid;
    grid-template-columns: 210px 1fr auto;
    gap: 12px;
}

.trail-step {
    font-weight: 600;
    color: var(--green-900);
}

.trail-ts {
    color: var(--fg-subtle);
    white-space: nowrap;
}

@media (max-width: 860px) {
    .ots-body {
        grid-template-columns: 1fr;
    }

    .stepper ol {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .step-label {
        font-size: 12px;
    }

    .helpdesk {
        display: none;
    }

    .admin-main {
        grid-template-columns: 1fr;
    }

    .trail li {
        grid-template-columns: 1fr;
        gap: 2px;
    }
}

@media (max-width: 520px) {
    .sms-host {
        left: 12px;
        right: 12px;
        bottom: 12px;
    }

    .sms-phone {
        width: 100%;
    }
}

@media print {
    body {
        background: #fff;
    }

    .demo-banner,
    .no-print,
    .sms-host,
    .site-footer {
        display: none !important;
    }

    .ots-body {
        display: block;
        padding: 0;
        max-width: none;
    }

    .panel {
        border: 0;
        box-shadow: none;
        padding: 0;
    }

    .letter {
        border: 0;
        margin: 0;
        padding: 0;
        max-width: none;
    }
}

.admin-login {
    flex: 1;
    display: grid;
    place-items: start center;
    padding: 48px 16px;
}

.admin-login .panel {
    width: 100%;
    max-width: 440px;
}

.site-header .btn.link {
    color: #fff;
}