/* ============================================================
   VoltaAI Gateway — v2 components
   ------------------------------------------------------------
   New component primitives. Use the .v2- prefix to avoid
   clashes with legacy `.btn`, `.card`, etc. Pages opted into
   v2 use these directly; legacy pages keep working off base.css.
   ============================================================ */

/* HTML `hidden` attribute must always win over component display
   rules. Without this, .mobile-nav { display: flex } overrides
   <div hidden> and the mobile sheet covers the desktop page. */
[hidden] { display: none !important; }

/* v2 marketing/product pages toggle the mobile nav sheet via the `hidden`
   attribute (not a `.active` class). base.css contains a legacy
   `.mobile-nav { display: none }` rule that wins on those pages because it
   loads after components.css and welcome.css does not load there. This
   selector's specificity (0,2,0) beats the bare class rule (0,1,0) so the
   sheet shows once JS removes the `hidden` attribute. Pure visual rules
   (background, layout, typography) stay in welcome.css for surfaces that
   load it; this fallback just guarantees the sheet is visible. */
.mobile-nav:not([hidden]) {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--paper-50, #fafafa);
  color: var(--ink-900, #111);
  padding: var(--s-12, 48px) var(--s-6, 24px);
  gap: var(--s-3, 12px);
  overflow-y: auto;
  align-items: stretch;
  justify-content: flex-start;
  opacity: 1;
}
.mobile-nav:not([hidden]) a {
  color: inherit;
  text-decoration: none;
  font-family: var(--font-sans, sans-serif);
  font-size: var(--t-h5, 1.25rem);
  font-weight: 600;
  padding: var(--s-3, 12px) 0;
  border-bottom: 1px solid var(--paper-200, #e5e5e5);
}
.mobile-nav:not([hidden]) a:last-child { border-bottom: 0; }

/* ============================================================
   BUTTONS
   ============================================================ */

[data-surface] .v2-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  font-family: var(--font-sans);
  font-size: var(--t-base);
  font-weight: 500;
  line-height: 1.2;
  padding: 10px 16px;
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
  white-space: nowrap;
  user-select: none;
}

[data-surface] .v2-btn[disabled],
[data-surface] .v2-btn.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary — ink-on-paper, the single most important action per screen */
[data-surface="marketing"] .v2-btn-primary {
  background: var(--ink-900);
  color: var(--paper-0);
}
[data-surface="marketing"] .v2-btn-primary:hover {
  background: var(--ink-700);
}
[data-surface="product"] .v2-btn-primary {
  background: var(--ink-900);
  color: var(--paper-0);
}
[data-surface="product"] .v2-btn-primary:hover {
  background: var(--ink-700);
}

/* Secondary — outline */
[data-surface] .v2-btn-secondary {
  background: transparent;
  color: var(--ink-900);
  border-color: var(--paper-300);
}
[data-surface] .v2-btn-secondary:hover {
  background: var(--paper-100);
}

/* Ghost — text-only */
[data-surface] .v2-btn-ghost {
  background: transparent;
  color: var(--ink-700);
  padding: 6px 8px;
  min-height: auto;
}
[data-surface] .v2-btn-ghost:hover {
  color: var(--ink-900);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Size variants */
[data-surface] .v2-btn-sm { padding: 6px 10px; min-height: 32px; font-size: var(--t-sm); }
[data-surface] .v2-btn-lg { padding: 14px 22px; min-height: 48px; font-size: var(--t-md); }

[data-surface] .v2-btn .icon { width: 16px; height: 16px; flex-shrink: 0; }

/* Loading state */
[data-surface] .v2-btn.is-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}
[data-surface] .v2-btn.is-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-top-color: transparent;
  animation: v2Spin 0.7s linear infinite;
  color: var(--paper-0);
}
@keyframes v2Spin { to { transform: rotate(360deg); } }

/* Spinner class for lucide loader-2 / refresh-cw used in JS-injected buttons.
   Applies to both the original <i> (before hydration) and the <svg> lucide
   substitutes in. Keep on its own selector — components.css can't assume
   page CSS will provide it. */
[data-surface] .spin,
[data-surface] svg.spin {
  animation: v2Spin 0.9s linear infinite;
  transform-origin: center;
}

/* ============================================================
   FIELDS
   ============================================================ */

[data-surface] .v2-field { display: block; margin-bottom: var(--s-4); }

[data-surface] .v2-field-label {
  display: block;
  font: 500 var(--t-sm)/1.4 var(--font-sans);
  color: var(--ink-700);
  margin-bottom: 6px;
}

[data-surface] .v2-input,
[data-surface] .v2-textarea,
[data-surface] .v2-select {
  width: 100%;
  font: 400 var(--t-md)/1.4 var(--font-sans);
  padding: 10px 12px;
  background: var(--paper-0);
  color: var(--ink-900);
  border: 1px solid var(--paper-300);
  border-radius: var(--r-md);
  min-height: 44px;
  outline: none;
  transition: border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}

[data-surface="product"] .v2-input,
[data-surface="product"] .v2-textarea,
[data-surface="product"] .v2-select {
  background: var(--paper-100);
}

[data-surface] .v2-input::placeholder,
[data-surface] .v2-textarea::placeholder { color: var(--ink-300); }

[data-surface] .v2-input:focus,
[data-surface] .v2-textarea:focus,
[data-surface] .v2-select:focus {
  border-color: var(--signal);
  box-shadow: 0 0 0 3px var(--ring);
}

[data-surface] .v2-textarea { min-height: 96px; resize: vertical; }

[data-surface] .v2-field-helper {
  font: 400 var(--t-xs)/1.4 var(--font-sans);
  color: var(--ink-500);
  margin-top: 6px;
}
[data-surface] .v2-field-error {
  font: 400 var(--t-xs)/1.4 var(--font-sans);
  color: var(--danger);
  margin-top: 6px;
}

/* ============================================================
   CARDS — flat, hairline-defined
   ============================================================ */

[data-surface] .v2-card {
  background: var(--paper-0);
  border: var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--s-6);
}
[data-surface="product"] .v2-card {
  background: var(--paper-100);
}

[data-surface] .v2-card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--s-4);
}

[data-surface] .v2-card-title {
  font: 600 var(--t-h6)/1.2 var(--font-sans);
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

/* ============================================================
   BADGES — state, not decoration
   ============================================================ */

[data-surface] .v2-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 500 var(--t-xs)/1 var(--font-mono);
  letter-spacing: var(--tracking-mono);
  padding: 4px 8px;
  border-radius: var(--r-pill);
  border: 1px solid currentColor;
  background: transparent;
  text-transform: uppercase;
  white-space: nowrap;
}
[data-surface] .v2-badge.live    { color: var(--signal); }
[data-surface] .v2-badge.warn    { color: var(--warn); }
[data-surface] .v2-badge.danger  { color: var(--danger); }
[data-surface] .v2-badge.info    { color: var(--info); }
[data-surface] .v2-badge.muted   { color: var(--ink-500); }
[data-surface] .v2-badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
}
[data-surface] .v2-badge.live .dot { animation: v2Pulse 2s ease-in-out infinite; }
@keyframes v2Pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.35; }
}

/* ============================================================
   EYEBROW row — mono small-caps section labels
   ============================================================ */

[data-surface] .v2-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--ink-500);
  line-height: 1.4;
}

/* ============================================================
   SPEC RAIL — mono key/value blocks (login right pane, footer)
   ============================================================ */

[data-surface] .v2-spec {
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  line-height: 2;
}
[data-surface] .v2-spec dt {
  display: inline-block;
  width: 200px;
  color: var(--ink-500);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  font-size: var(--t-xs);
}
[data-surface] .v2-spec dd {
  display: inline;
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
}
[data-surface] .v2-spec dd::after { content: '\A'; white-space: pre; }

[data-surface] .v2-spec-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-4);
  padding: 10px 0;
  border-bottom: 1px solid var(--paper-200);
  font-family: var(--font-mono);
  font-size: var(--t-sm);
}
[data-surface="product"] .v2-spec-row {
  border-bottom-color: var(--paper-300);
}
[data-surface] .v2-spec-row:last-child { border-bottom: 0; }
[data-surface] .v2-spec-row-label {
  color: var(--ink-500);
  font-size: var(--t-xs);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
}
[data-surface] .v2-spec-row-value {
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* Inline horizontal spec rail (hero) */
[data-surface] .v2-spec-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-8);
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  color: var(--ink-500);
}
[data-surface] .v2-spec-inline > span { display: inline-flex; gap: 8px; }
[data-surface] .v2-spec-inline strong {
  font-weight: 600;
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   TABLES
   ============================================================ */

[data-surface] .v2-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: var(--t-base);
}
[data-surface] .v2-table thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--ink-500);
  padding: 12px 16px;
  border-bottom: 1px solid var(--paper-300);
  white-space: nowrap;
}
[data-surface="product"] .v2-table thead th {
  border-bottom-color: var(--paper-300);
}
[data-surface] .v2-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--paper-200);
  color: var(--ink-700);
  vertical-align: middle;
}
[data-surface="product"] .v2-table tbody td {
  border-bottom-color: var(--paper-200);
}
[data-surface] .v2-table tbody tr:last-child td { border-bottom: none; }
[data-surface] .v2-table tbody tr:hover td {
  background: var(--paper-50);
  color: var(--ink-900);
}
[data-surface="product"] .v2-table tbody tr:hover td {
  background: var(--paper-100);
}
[data-surface] .v2-table td.num,
[data-surface] .v2-table th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  font-size: var(--t-sm);
}
[data-surface] .v2-table td.code {
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  color: var(--ink-900);
}

/* ============================================================
   CODE BLOCK
   ============================================================ */

[data-surface] .v2-code {
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  line-height: 1.6;
  background: var(--paper-100);
  border: var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--s-4);
  overflow-x: auto;
  color: var(--ink-900);
}
[data-surface="product"] .v2-code {
  background: var(--paper-0);
}
[data-surface] code.v2-inline {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--paper-100);
  padding: 1px 6px;
  border-radius: var(--r-sm);
  color: var(--ink-900);
}

/* ============================================================
   NAVBAR (marketing) — sticky, hairline-bottom, no glass
   ============================================================ */

[data-surface="marketing"] .v2-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: var(--hairline);
}
[data-surface="marketing"] .v2-nav-row {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px var(--s-6);
}
[data-surface="marketing"] .v2-wordmark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font: 600 var(--t-md)/1 var(--font-sans);
  letter-spacing: -0.02em;
  color: var(--ink-900);
  text-decoration: none;
}
[data-surface="marketing"] .v2-wordmark::before {
  content: "";
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  background: url("/images/logo-mark.svg") center / contain no-repeat;
}
[data-surface="marketing"] .v2-nav-links {
  display: flex;
  gap: var(--s-6);
  align-items: center;
}
[data-surface="marketing"] .v2-nav-link {
  font: 500 var(--t-sm) var(--font-sans);
  color: var(--ink-700);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
[data-surface="marketing"] .v2-nav-link:hover,
[data-surface="marketing"] .v2-nav-link.is-active {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

/* ============================================================
   FOOTER (marketing)
   ============================================================ */

[data-surface="marketing"] .v2-footer {
  border-top: var(--hairline);
  margin-top: var(--s-24);
  padding: var(--s-12) var(--s-6) var(--s-8);
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  color: var(--ink-500);
}
[data-surface="marketing"] .v2-footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-8);
}
[data-surface="marketing"] .v2-footer h6 {
  font: 500 var(--t-xs)/1.4 var(--font-mono);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--ink-500);
  margin-bottom: var(--s-3);
}
[data-surface="marketing"] .v2-footer ul { list-style: none; padding: 0; margin: 0; }
[data-surface="marketing"] .v2-footer li { margin-bottom: 4px; }
[data-surface="marketing"] .v2-footer a {
  color: var(--ink-700);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
}
[data-surface="marketing"] .v2-footer a:hover { color: var(--ink-900); text-decoration: underline; text-underline-offset: 3px; }
[data-surface="marketing"] .v2-footer-legal {
  grid-column: 1 / -1;
  margin-top: var(--s-8);
  padding-top: var(--s-6);
  border-top: var(--hairline);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-400);
  line-height: 1.7;
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-4);
  justify-content: space-between;
}

@media (max-width: 768px) {
  [data-surface="marketing"] .v2-footer-inner { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   PRODUCT SIDEBAR primitives
   ============================================================ */

[data-surface="product"] .v2-side {
  width: 280px;
  background: var(--paper-100);
  border-right: var(--hairline);
  display: flex;
  flex-direction: column;
  height: 100dvh;
  position: sticky;
  top: 0;
  font-family: var(--font-sans);
}
[data-surface="product"] .v2-side-section {
  padding: var(--s-4) var(--s-4) 0;
  border-top: var(--hairline);
}
[data-surface="product"] .v2-side-section:first-of-type { border-top: 0; }
[data-surface="product"] .v2-side-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--s-2);
}

[data-surface="product"] .v2-side-row {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: 8px 10px;
  margin-bottom: 2px;
  border-radius: var(--r-md);
  color: var(--ink-700);
  font-size: var(--t-sm);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  min-height: 36px;
}
[data-surface="product"] .v2-side-row:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink-900);
}
[data-surface="product"] .v2-side-row.is-active {
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink-900);
}
[data-surface="product"] .v2-side-row .icon {
  width: 16px; height: 16px; flex-shrink: 0;
}
[data-surface="product"] .v2-side-row time,
[data-surface="product"] .v2-side-row .meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-400);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   DIALOG / MODAL
   ============================================================ */

[data-surface] .v2-dialog-backdrop {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur-base) var(--ease-out),
              visibility var(--dur-base) var(--ease-out);
}
[data-surface] .v2-dialog-backdrop.is-open { opacity: 1; visibility: visible; }

[data-surface] .v2-dialog {
  background: var(--paper-0);
  color: var(--ink-900);
  border: var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--s-6);
  width: calc(100% - 32px);
  max-width: 480px;
  max-height: 90dvh;
  overflow: auto;
  box-shadow: var(--shadow-float);
  transform: scale(0.96);
  transition: transform var(--dur-base) var(--ease-out);
}
[data-surface="product"] .v2-dialog { background: var(--paper-100); }
[data-surface] .v2-dialog-backdrop.is-open .v2-dialog { transform: scale(1); }

/* ============================================================
   TOAST
   ============================================================ */

[data-surface] .v2-toast-stack {
  position: fixed;
  bottom: var(--s-4);
  right: var(--s-4);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  z-index: 300;
  pointer-events: none;
}
[data-surface] .v2-toast {
  font-family: var(--font-sans);
  background: var(--paper-0);
  color: var(--ink-900);
  border: var(--hairline);
  border-radius: var(--r-md);
  padding: 10px 14px;
  font-size: var(--t-sm);
  display: flex;
  align-items: center;
  gap: var(--s-2);
  box-shadow: var(--shadow-float);
  pointer-events: auto;
  min-width: 240px;
}
[data-surface="product"] .v2-toast { background: var(--paper-200); }
[data-surface] .v2-toast .icon { width: 16px; height: 16px; flex-shrink: 0; }
[data-surface] .v2-toast.is-error .icon { color: var(--danger); }
[data-surface] .v2-toast.is-success .icon { color: var(--signal); }

/* ============================================================
   UTILITY
   ============================================================ */

[data-surface] .v2-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--s-6);
}
[data-surface] .v2-container-tight {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 var(--s-6);
}
[data-surface] .v2-section { padding: var(--s-20) 0; }
[data-surface] .v2-section-tight { padding: var(--s-12) 0; }

[data-surface] .v2-hairline { border-top: var(--hairline); }
[data-surface] .v2-mute     { color: var(--ink-500); }
[data-surface] .v2-stack-2  { display: flex; flex-direction: column; gap: var(--s-2); }
[data-surface] .v2-stack-4  { display: flex; flex-direction: column; gap: var(--s-4); }
[data-surface] .v2-stack-6  { display: flex; flex-direction: column; gap: var(--s-6); }
[data-surface] .v2-row      { display: flex; align-items: center; gap: var(--s-3); }
[data-surface] .v2-row-end  { display: flex; align-items: center; gap: var(--s-3); justify-content: flex-end; }
[data-surface] .v2-grid-2   { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-6); }
@media (max-width: 768px) {
  [data-surface] .v2-grid-2 { grid-template-columns: 1fr; }
}

/* Lucide icon defaults */
[data-surface] [data-lucide] {
  width: 20px;
  height: 20px;
  stroke-width: 1.5;
  flex-shrink: 0;
  vertical-align: middle;
}
[data-surface] .v2-btn [data-lucide] { width: 16px; height: 16px; }
[data-surface] .v2-side-row [data-lucide] { width: 16px; height: 16px; }