/* Updated: add invoice quick buttons and "Same as signer" button layout. */

:root {
  color-scheme: light;
  --clr-bg: #0f1117;
  --clr-surface: #1a1d27;
  --clr-surface-alt: #222633;
  --clr-border: #2d3348;
  --clr-border-accent: #3b82f6;
  --clr-text: #e2e8f0;
  --clr-text-muted: #94a3b8;
  --clr-text-dim: #64748b;
  --clr-primary: #3b82f6;
  --clr-primary-hover: #2563eb;
  --clr-accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --clr-success: #22c55e;
  --clr-error-bg: #1c1215;
  --clr-error-border: #7f1d1d;
  --clr-error-text: #fca5a5;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.5;
}

/* ── Container ─────────────────────────────────────────────────────── */

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 24px;
}

/* ── Header ────────────────────────────────────────────────────────── */

.page-header {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--clr-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--clr-text);
}

.subtitle {
  margin: 0;
  color: var(--clr-text-muted);
  font-size: 0.9rem;
}

/* ── Global Signing ID ─────────────────────────────────────────────── */

.global-signing-id {
  max-width: 600px;
  border-left: 3px solid var(--clr-border-accent);
}

.global-signing-id label {
  margin-bottom: 0;
}

.global-signing-id select,
.global-signing-id input[type="text"] {
  width: 100%;
}

/* ── Tab Navigation ────────────────────────────────────────────────── */

.tab-nav {
  display: inline-flex;
  gap: 4px;
  background: var(--clr-surface);
  padding: 4px;
  border-radius: 999px;
  width: fit-content;
  border: 1px solid var(--clr-border);
  margin-top: 8px;
}

.tab-button {
  background: transparent;
  color: var(--clr-text-muted);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.tab-button:hover {
  color: var(--clr-text);
}

.tab-button[aria-pressed="true"] {
  background: var(--clr-accent-gradient);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

/* ── Split Layout ──────────────────────────────────────────────────── */

.split-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 28px;
  align-items: start;
}

.split-inputs {
  min-width: 0;
}

.split-reference {
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (max-width: 960px) {
  .split-layout {
    grid-template-columns: 1fr;
  }

  .split-reference {
    position: static;
  }
}

/* ── Cards ─────────────────────────────────────────────────────────── */

.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

/* ── Reference Cards ───────────────────────────────────────────────── */

.ref-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--clr-border-accent);
}

.ref-card h3 {
  margin: 0 0 6px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--clr-primary);
}

.ref-desc {
  margin: 0 0 8px;
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  line-height: 1.4;
}

.ref-snippet {
  background: var(--clr-surface-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  position: relative;
}

.ref-snippet code,
.ref-snippet pre {
  font-family: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--clr-text);
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
  flex: 1;
}

.ref-snippet pre code {
  display: block;
}

/* ── Copy Button ───────────────────────────────────────────────────── */

.copy-btn {
  background: var(--clr-border);
  color: var(--clr-text-muted);
  border: none;
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.copy-btn:hover {
  background: var(--clr-primary);
  color: #fff;
}

.copy-btn.copied {
  background: var(--clr-success);
  color: #fff;
}

/* ── Tags (required / optional) ────────────────────────────────────── */

.tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  vertical-align: middle;
}

.tag.optional {
  background: rgba(100, 116, 139, 0.2);
  color: var(--clr-text-dim);
}

.tag.required {
  background: rgba(59, 130, 246, 0.15);
  color: var(--clr-primary);
}

/* ── Form Elements ─────────────────────────────────────────────────── */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--clr-text);
  margin-bottom: 12px;
}

.input-with-action {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.input-with-action input {
  flex: 1;
  min-width: 200px;
}

.input-with-action button {
  white-space: nowrap;
}

.quick-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.quick-buttons button {
  padding: 4px 8px;
  font-size: 0.75rem;
}

.stack {
  display: grid;
  gap: 10px;
  margin-bottom: 12px;
}

.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  margin-bottom: 0;
}

input,
textarea,
select {
  font: inherit;
  font-size: 0.9rem;
  padding: 10px 12px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: var(--clr-surface-alt);
  color: var(--clr-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

input:disabled,
textarea:disabled,
select:disabled {
  background: rgba(30, 33, 44, 0.6);
  color: var(--clr-text-dim);
  cursor: not-allowed;
}

input::placeholder,
textarea::placeholder {
  color: var(--clr-text-dim);
}

textarea {
  font-family: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.4;
  resize: vertical;
}

select {
  cursor: pointer;
}

.help {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  font-weight: 400;
}

.hint {
  margin-top: 0;
  color: var(--clr-text-muted);
}

.hint.small {
  font-size: 0.85rem;
  margin-bottom: 12px;
}

/* ── Checkbox styling ──────────────────────────────────────────────── */

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--clr-primary);
  cursor: pointer;
}

.checkbox-label {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 10px;
  font-weight: 600;
  margin-bottom: 12px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  margin-top: 2px;
  flex-shrink: 0;
}

.checkbox-label .help {
  display: block;
  margin-top: 4px;
  font-weight: 400;
}

/* ── Radio styling ─────────────────────────────────────────────────── */

input[type="radio"] {
  width: 16px;
  height: 16px;
  accent-color: var(--clr-primary);
  cursor: pointer;
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 8px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  cursor: pointer;
  padding: 8px 12px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, background 0.15s;
}

.radio-label:hover {
  border-color: var(--clr-border-accent);
}

.radio-label:has(input:checked) {
  background: var(--clr-surface-alt);
  border-color: var(--clr-primary);
}

fieldset {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin: 0 0 16px 0;
  background: var(--clr-surface-alt);
}

fieldset legend {
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0 8px;
  color: var(--clr-text);
}

/* ── Flags Group ───────────────────────────────────────────────────── */

.flags-group {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 16px;
  background: var(--clr-surface-alt);
}

.flags-group legend {
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0 8px;
  color: var(--clr-text);
}

.flags-group .checkbox-label {
  margin-bottom: 8px;
}

.flags-group .checkbox-label:last-child {
  margin-bottom: 0;
}

/* ── Actions ───────────────────────────────────────────────────────── */

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

button[type="submit"] {
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  background: var(--clr-accent-gradient);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: opacity 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
}

button[type="submit"]:hover {
  opacity: 0.9;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

button[type="submit"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:not([type="submit"]):not(.tab-button):not(.copy-btn) {
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  background: var(--clr-surface-alt);
  color: var(--clr-primary);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border: 1px solid var(--clr-border);
  transition: background 0.15s ease;
}

button:not([type="submit"]):not(.tab-button):not(.copy-btn):hover {
  background: var(--clr-border);
}

.status {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
}

/* ── Error ─────────────────────────────────────────────────────────── */

.error {
  border: 1px solid var(--clr-error-border);
  background: var(--clr-error-bg);
  color: var(--clr-error-text);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

/* ── Result Grid ───────────────────────────────────────────────────── */

.result-grid {
  display: grid;
  grid-template-columns: minmax(240px, 300px) 1fr;
  gap: 16px;
  align-items: start;
}

.qr-wrapper {
  border: 1px dashed var(--clr-border);
  border-radius: var(--radius);
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--clr-surface-alt);
}

.qr-wrapper img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.result-details textarea {
  min-height: 140px;
}

@media (max-width: 640px) {
  .result-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Signature Status ──────────────────────────────────────────────── */

.signature-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid var(--clr-success);
  border-radius: var(--radius-sm);
  color: var(--clr-success);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.tick-icon {
  font-size: 1.2rem;
  font-weight: 700;
}

/* ── Attestation Builder ───────────────────────────────────────────── */

.attestation-builder {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 16px;
  background: var(--clr-surface-alt);
}

.attestation-builder summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--clr-text);
  user-select: none;
}

.attestation-builder summary:hover {
  color: var(--clr-accent);
}

.attestation-builder .input-with-action select {
  flex: 1;
  min-width: 0;
  background: var(--clr-surface);
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 0.85rem;
  font-family: monospace;
}

.mmrdata-entry + .mmrdata-entry {
  border-top: 1px solid var(--clr-border);
  padding-top: 0.5rem;
  margin-top: 0.5rem;
}

.mmrdata-remove {
  background: transparent;
  border: 1px solid var(--clr-error);
  color: var(--clr-error);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 4px 8px;
  line-height: 1;
}

.mmrdata-remove:hover {
  background: rgba(239, 68, 68, 0.15);
}