:root {
    --blue: #4095D1;
    --navy: #1C4B79;
    --grey: #6D6D6D;
    --yellow: #FFCB05;
    --light-blue: #E6F2F9;
    --light-yellow: #FFFAE1;
    --light-grey: #D5D5D5;

    --bg: #f4f6f9;
    --card: #ffffff;
    --primary: var(--blue);
    --primary-hover: var(--navy);
    --border: var(--light-grey);
    --text: var(--grey);
    --heading: var(--navy);
    --muted: #9a9a9a;
    --danger-bg: #fef2f2;
    --danger-border: #fca5a5;
    --danger-text: #b91c1c;
    --radius: 10px;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 32px 16px;
    line-height: 1.5;
    font-size: 16px;
}

.fpx-container {
    max-width: 860px;
    margin: 0 auto;
}

.fpx-header {
    margin-bottom: 24px;
}

.fpx-header h1 {
    font-size: 48px;
    font-weight: 300;
    color: var(--blue);
    line-height: 1.1;
    margin: 0 0 6px;
}

.fpx-header p {
    margin: 0;
    color: var(--grey);
    font-size: 16px;
}

.fpx-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(16, 24, 40, 0.04), 0 1px 2px rgba(16, 24, 40, 0.06);
    padding: 24px 28px;
    margin-bottom: 20px;
}

.flow-row {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    padding-bottom: 20px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--border);
}

.flow-row label {
    font-weight: 600;
    font-size: 16px;
    color: var(--heading);
}

.flow-row select {
    width: auto;
    min-width: 160px;
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--blue);
    margin: 0 0 16px;
}

table.fields {
    width: 100%;
    border-collapse: collapse;
}

table.fields > tbody > tr > td,
table.fields > tr > td {
    padding: 9px 0;
    vertical-align: middle;
}

table.fields > tbody > tr > td:first-child,
table.fields > tr > td:first-child {
    width: 38%;
    font-weight: 600;
    color: var(--heading);
    padding-right: 20px;
}

label, td {
    font-size: 14px;
}

input[type="text"],
select,
textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 9px 11px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(64, 149, 209, 0.25);
}

input[type="text"]:disabled,
select:disabled,
textarea:disabled {
    background: #f3f4f6;
    color: var(--muted);
    cursor: not-allowed;
}

textarea[name="private_key"] {
    height: 160px;
    resize: vertical;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 13px;
}

/* keep nested layout tables transparent */
td table { width: 100%; }
td table td { padding: 0; }
td table td:first-child { width: auto; }

.inline-group {
    display: flex;
    gap: 8px;
    align-items: center;
}

.inline-group input[type="text"] { flex: 1; }
.inline-group input[type="checkbox"] { flex: 0 0 auto; }

input[type="checkbox"] {
    width: 17px;
    height: 17px;
    accent-color: var(--primary);
    cursor: pointer;
    margin: 0;
}

button.generate {
    white-space: nowrap;
    padding: 8px 14px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    color: var(--navy);
    background: var(--light-blue);
    border: 1px solid var(--blue);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

button.generate:hover { background: #d4e8f5; }
button.generate:disabled { opacity: 0.5; cursor: not-allowed; }

.error-banner {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger-text);
    border-radius: 8px;
    padding: 12px 16px;
    margin: 18px 0 4px;
    font-size: 14px;
}

.error-banner strong { font-weight: 600; }

.field-error,
.field-error:focus {
    border-color: var(--danger-border) !important;
    box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.12) !important;
}

.label-error { color: var(--danger-text) !important; }

.failure-grid td:first-child { width: auto; font-weight: 400; color: var(--text); }

.failure-grid > tbody > tr,
.failure-grid > tr {
    border-bottom: 1px solid #f0f1f4;
}

.failure-grid td { padding: 7px 0 !important; }

.submit-row {
    display: flex;
    justify-content: flex-end;
}

input[type="submit"].btn-primary,
.btn-primary {
    width: auto;
    padding: 12px 26px;
    font-family: inherit;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    background: var(--primary);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

input[type="submit"].btn-primary:hover,
.btn-primary:hover { background: var(--primary-hover); }

.params-card {
    background: var(--light-blue);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    margin-bottom: 20px;
}

.params-card > summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    color: var(--navy);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.params-card > summary::-webkit-details-marker { display: none; }

.params-card > summary::before {
    content: "\25B8";
    color: var(--blue);
    transition: transform 0.15s;
}

.params-card[open] > summary::before { transform: rotate(90deg); }

.params-list,
.detail-list {
    margin: 14px 0 2px;
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 8px 18px;
}

.detail-list { margin: 0; }

.param-row,
.detail-row { display: contents; }

.params-list dt,
.params-list dd,
.detail-list dt,
.detail-list dd {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 13px;
    word-break: break-all;
}

.params-list dt,
.detail-list dt { font-weight: 500; color: var(--muted); }
.params-list dd,
.detail-list dd { margin: 0; color: var(--text); }

/* ---- Flow / preview / results pages ---- */

.flow-note {
    max-width: 860px;
    margin: 0 auto 20px;
    background: var(--light-blue);
    border: 1px solid var(--blue);
    border-left-width: 4px;
    border-radius: 8px;
    padding: 12px 18px;
    color: var(--navy);
    font-weight: 600;
}

.btn-link {
    display: inline-block;
    text-decoration: none;
    text-align: center;
}

.btn-secondary {
    width: auto;
    padding: 12px 24px;
    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    color: var(--navy);
    background: var(--light-blue);
    border: 1px solid var(--blue);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-secondary:hover { background: #d4e8f5; }

.edit-form {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.link-preview {
    margin-top: 14px;
    padding: 12px 14px;
    background: #f8fafc;
    border: 1px dashed var(--light-grey);
    border-radius: 8px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 13px;
    color: var(--text);
    word-break: break-all;
}

.debug-dump {
    max-width: 860px;
    margin: 0 auto 16px;
    background: #fff;
    border: 1px dashed var(--light-grey);
    border-radius: 8px;
    padding: 12px 16px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 12px;
    color: var(--muted);
    white-space: pre-wrap;
    word-break: break-word;
    overflow-x: auto;
}