body {
    min-height: 100vh;
    background:
        linear-gradient(rgba(15, 23, 42, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.03) 1px, transparent 1px),
        var(--color-bg);
    background-size: 48px 48px;
}

.merchant-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    z-index: 20;
}

.merchant-logo,
.nav-login {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.nav-actions {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.nav-user {
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 600;
}

.merchant-logo {
    gap: 12px;
    color: var(--color-text);
    font-size: 20px;
    font-weight: 700;
}

.merchant-logo-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: var(--color-primary);
    border-radius: var(--radius-md);
}

.merchant-logo-icon svg {
    width: 22px;
    height: 22px;
}

.nav-login {
    height: 40px;
    padding: 0 16px;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.nav-login:hover {
    color: var(--color-text);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.merchant-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(320px, 0.92fr) minmax(420px, 1.08fr);
    gap: 40px;
    align-items: center;
    max-width: 1120px;
    margin: 0 auto;
    padding: 120px 32px 64px;
}

.merchant-intro h1 {
    margin-top: 20px;
    font-size: 56px;
    line-height: 1;
    letter-spacing: 0;
    color: var(--color-primary);
}

.merchant-intro p {
    margin-top: 18px;
    max-width: 520px;
    color: var(--color-text-secondary);
    font-size: 17px;
    line-height: 1.8;
}

.status-pill,
.env-tag {
    display: inline-flex;
    align-items: center;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
}

.status-pill {
    gap: 8px;
    padding: 8px 14px;
    color: var(--color-accent);
    background: var(--color-accent-light);
    border: 1px solid rgba(59, 130, 246, 0.18);
}

.status-pill span {
    width: 7px;
    height: 7px;
    background: var(--color-accent);
    border-radius: 50%;
}

.process-list {
    display: grid;
    gap: 12px;
    margin-top: 34px;
}

.process-item {
    display: flex;
    gap: 14px;
    align-items: center;
    padding: 14px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.process-item b {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border-radius: var(--radius-full);
    font-size: 13px;
}

.process-item.active b {
    color: #fff;
    background: var(--color-primary);
}

.process-item strong {
    display: block;
    color: var(--color-text);
    font-size: 14px;
}

.process-item span {
    display: block;
    margin-top: 3px;
    color: var(--color-text-muted);
    font-size: 12px;
}

.auth-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 28px;
}

.panel-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}

.panel-heading h2 {
    color: var(--color-text);
    font-size: 22px;
    line-height: 1.25;
}

.panel-heading p {
    margin-top: 6px;
    color: var(--color-text-secondary);
    font-size: 13px;
}

.env-tag {
    flex-shrink: 0;
    padding: 6px 10px;
    color: var(--color-success);
    background: var(--color-success-bg);
}

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

.merchant-picker {
    display: grid;
    gap: 12px;
    padding: 14px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.picker-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.picker-heading strong {
    color: var(--color-text);
    font-size: 13px;
}

.picker-heading .new-merchant-btn {
    height: 30px;
    padding: 0 10px;
    color: var(--color-accent);
    background: var(--color-surface);
    border: 1px solid rgba(59, 130, 246, 0.24);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}

.picker-heading .new-merchant-btn.active,
.picker-heading .new-merchant-btn:disabled {
    color: var(--color-text-muted);
    background: var(--color-bg);
    border-color: var(--color-border);
    cursor: default;
}

.merchant-list {
    display: grid;
    gap: 8px;
    max-height: 188px;
    overflow: auto;
}

.merchant-option {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    text-align: left;
    cursor: pointer;
}

.merchant-option.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.08);
}

.merchant-option span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
    font-weight: 700;
}

.merchant-option em {
    flex-shrink: 0;
    color: var(--color-text-muted);
    font-style: normal;
    font-size: 12px;
}

.empty-state {
    padding: 12px;
    color: var(--color-text-muted);
    background: rgba(255, 255, 255, 0.62);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    font-size: 12px;
    line-height: 1.6;
}

.form-mode-note {
    display: grid;
    gap: 5px;
    padding: 12px 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.form-mode-note strong {
    color: var(--color-text);
    font-size: 13px;
}

.form-mode-note span {
    color: var(--color-text-secondary);
    font-size: 12px;
    line-height: 1.55;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.field {
    display: grid;
    gap: 7px;
}

.field span,
.internal-fields summary {
    color: var(--color-text-secondary);
    font-size: 12px;
    font-weight: 600;
}

.field input {
    width: 100%;
    height: 44px;
    padding: 0 13px;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    font-family: var(--font-family);
    font-size: 14px;
    transition: all var(--transition);
}

.field input:focus {
    border-color: var(--color-accent);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.internal-fields {
    padding: 14px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.internal-fields summary {
    cursor: pointer;
}

.internal-fields .field-row {
    margin-top: 14px;
}

.submit-btn {
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #fff;
    background: var(--color-primary);
    border: 0;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.submit-btn:hover:not(:disabled) {
    background: #1E293B;
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.18);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.submit-btn .spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner.dark {
    border-color: rgba(15, 23, 42, 0.18);
    border-top-color: var(--color-primary);
}

.auth-result,
.callback-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.auth-result {
    margin-top: 18px;
    margin-bottom: 0;
    background: var(--color-success-bg);
    border: 1px solid rgba(16, 185, 129, 0.18);
}

.auth-result strong,
.callback-banner strong {
    display: block;
    font-size: 13px;
}

.auth-result span,
.callback-banner span {
    display: block;
    margin-top: 3px;
    color: var(--color-text-secondary);
    font-size: 12px;
}

.open-auth {
    flex-shrink: 0;
    color: #fff;
    background: var(--color-success);
    text-decoration: none;
    padding: 9px 13px;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 700;
}

.callback-banner.success {
    background: var(--color-success-bg);
    border: 1px solid rgba(16, 185, 129, 0.18);
}

.callback-banner.failed {
    background: var(--color-error-bg);
    border: 1px solid rgba(239, 68, 68, 0.18);
}

.error-box {
    margin-top: 16px;
}

.shops-loading {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    color: var(--color-text-secondary);
    font-size: 13px;
}

.shops-panel {
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid var(--color-border);
}

.shops-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
}

.shops-heading h3 {
    color: var(--color-text);
    font-size: 18px;
    line-height: 1.25;
}

.shops-heading p {
    margin-top: 5px;
    color: var(--color-text-secondary);
    font-size: 12px;
}

.shops-heading > span {
    flex-shrink: 0;
    padding: 6px 10px;
    color: var(--color-accent);
    background: var(--color-accent-light);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
}

.shop-list {
    display: grid;
    gap: 8px;
}

.shop-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.shop-item strong,
.shop-item span {
    display: block;
}

.shop-item strong {
    color: var(--color-text);
    font-size: 13px;
}

.shop-item span {
    margin-top: 4px;
    color: var(--color-text-muted);
    font-size: 12px;
}

.shop-item em {
    flex-shrink: 0;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    padding: 5px 9px;
    font-style: normal;
    font-size: 12px;
    font-weight: 700;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 900px) {
    .merchant-shell {
        grid-template-columns: 1fr;
        gap: 24px;
        padding-top: 104px;
    }

    .merchant-intro h1 {
        font-size: 42px;
    }
}

@media (max-width: 640px) {
    .merchant-nav {
        height: 64px;
        padding: 0 20px;
    }

    .merchant-shell {
        padding: 92px 16px 36px;
    }

    .auth-panel {
        padding: 20px;
    }

    .field-row {
        grid-template-columns: 1fr;
    }
}