/* =========================================================
   ProfDev Schema — design system
   Signature: diff-rail (old → new) + mono schema labels
   ========================================================= */

:root {
  --bg: #eef1f4;
  --surface: #ffffff;
  --surface-2: #e4e8ed;
  --ink: #12181f;
  --ink-2: #4a5563;
  --ink-3: #7b8694;
  --accent: #1a5f7a;
  --accent-h: #144a60;
  --accent-soft: rgba(26, 95, 122, 0.1);
  --metric: #0a6b52;
  --metric-soft: rgba(10, 107, 82, 0.1);
  --rail-old: #b8c0ca;
  --border: #d0d6de;
  --focus: #1a5f7a;
  --radius: 8px;
  --radius-lg: 12px;
  --max: 1120px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --ease: 160ms ease;
  --header-h: 64px;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --ease: 0ms;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-h);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  margin: 0 0 0.55em;
  line-height: 1.22;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
  color: var(--ink-2);
}

ul {
  margin: 0 0 1em;
  padding-left: 1.15em;
  color: var(--ink-2);
}

/* Layout shell */
.site {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Diff rail (signature) ---------- */
.diff-rail {
  display: flex;
  flex-direction: column;
  width: 3px;
  flex-shrink: 0;
  border-radius: 2px;
  overflow: hidden;
  align-self: stretch;
  min-height: 2.5rem;
}

.diff-rail__old {
  flex: 1;
  background: var(--rail-old);
  min-height: 40%;
}

.diff-rail__new {
  flex: 1.4;
  background: var(--accent);
  min-height: 40%;
}

.diff-rail--h {
  flex-direction: row;
  width: auto;
  height: 3px;
  min-height: 0;
  align-self: auto;
}

.diff-rail--h .diff-rail__old,
.diff-rail--h .diff-rail__new {
  min-height: 0;
  height: 100%;
}

/* ---------- Schema labels ---------- */
.schema-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  color: var(--ink-3);
  margin-bottom: 0.85rem;
}

.schema-label__code {
  color: var(--accent);
  font-weight: 600;
}

.schema-label__sep {
  opacity: 0.5;
}

.schema-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--ink-3);
  background: var(--surface-2);
  border-radius: 4px;
  padding: 0.2rem 0.45rem;
  white-space: nowrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.btn:hover {
  text-decoration: none;
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-lg {
  padding: 0.85rem 1.4rem;
  font-size: 1rem;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
}

.logo:hover {
  text-decoration: none;
  color: var(--ink);
}

.logo__mark {
  display: flex;
  width: 18px;
  height: 22px;
}

.logo__mark .diff-rail {
  width: 4px;
  min-height: 22px;
  height: 22px;
}

.logo__word span {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 0.45rem 0.7rem;
  font: inherit;
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem 1.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.92rem;
}

.nav-list a:hover,
.nav-list .current-menu-item > a,
.nav-list .current_page_item > a {
  color: var(--accent);
}

/* ---------- Sections ---------- */
.section {
  padding: 3.75rem 0;
}

.section--surface {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section__head {
  max-width: 40rem;
  margin-bottom: 1.75rem;
}

.section__title {
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  margin-bottom: 0.4em;
}

.section__lead {
  margin: 0;
  font-size: 1.02rem;
}

.section__actions {
  margin-top: 1.5rem;
  text-align: center;
}

/* ---------- Hero ---------- */
.hero {
  padding: 3.5rem 0 3rem;
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.hero__title {
  font-size: clamp(1.55rem, 3.2vw, 2.25rem);
  margin-bottom: 0.75rem;
  max-width: 18em;
}

.hero__sub {
  font-size: 1.08rem;
  max-width: 34em;
  margin-bottom: 1.5rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
}

.hero__trust {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-3);
  font-family: var(--mono);
}

/* Schema diagram (right column) */
.schema-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.2rem 1.25rem;
  position: relative;
}

.schema-panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12%;
  bottom: 12%;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: linear-gradient(180deg, var(--rail-old) 0 42%, var(--accent) 42% 100%);
}

.schema-panel__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-left: 0.6rem;
}

.schema-panel__title {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

.schema-flow {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding-left: 0.6rem;
}

.schema-node {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem;
  align-items: center;
  background: var(--surface-2);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  font-size: 0.88rem;
  color: var(--ink);
  opacity: 0;
  transform: translateY(6px);
  animation: nodeIn 420ms ease forwards;
}

.schema-node:nth-child(1) { animation-delay: 80ms; }
.schema-node:nth-child(2) { animation-delay: 160ms; }
.schema-node:nth-child(3) { animation-delay: 240ms; }
.schema-node:nth-child(4) { animation-delay: 320ms; }
.schema-node:nth-child(5) { animation-delay: 400ms; }

@keyframes nodeIn {
  to {
    opacity: 1;
    transform: none;
  }
}

.schema-node__idx {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 600;
}

.schema-node__meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-3);
}

/* ---------- Pain grid ---------- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.pain-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.05rem;
  color: var(--ink-2);
  font-size: 0.96rem;
}

.pain-item .diff-rail {
  min-height: 2.2rem;
  margin-top: 0.15rem;
}

/* ---------- Service cards ---------- */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.75rem;
}

.svc-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1rem 1.15rem;
  text-decoration: none;
  color: inherit;
  height: 100%;
  transition: border-color var(--ease), background var(--ease);
}

.svc-card:hover {
  border-color: var(--accent);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
}

.svc-card__icon {
  color: var(--accent);
  display: flex;
}

.svc-card__title {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.01em;
}

.svc-card__desc {
  font-size: 0.86rem;
  color: var(--ink-2);
  margin: 0;
  flex: 1;
}

.svc-card__schema {
  margin-top: 0.35rem;
}

.svc-grid--overview {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.svc-card--overview {
  min-height: 17rem;
  padding: 1.35rem;
}

.svc-card__detail,
.svc-card__case {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.88rem;
}

.svc-card__detail strong,
.svc-card__case strong {
  display: block;
  color: var(--ink);
  font-size: 0.78rem;
  margin-bottom: 0.2rem;
}

.svc-card__case,
.svc-card__link {
  display: block;
  text-decoration: none;
}

.svc-card__case:hover,
.svc-card__link:hover {
  color: var(--accent);
}

.svc-card__link {
  margin-top: auto;
  padding-top: 0.5rem;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.88rem;
}

/* ---------- Process ---------- */
.process-rail {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.65rem;
  position: relative;
}

.process-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 0.9rem;
  position: relative;
}

.process-step__n {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.process-step__title {
  font-size: 0.98rem;
  margin: 0 0 0.35rem;
}

.process-step__text {
  font-size: 0.84rem;
  color: var(--ink-3);
  margin: 0;
}

.process-scroll-hint {
  display: none;
}

/* ---------- Case cards ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.case-card {
  display: flex;
  gap: 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.1rem 1.15rem;
  transition: border-color var(--ease);
}

.case-card-link,
.case-card-link:hover,
.case-card-link:focus {
  display: block;
  color: inherit;
  text-decoration: none;
}

.case-card-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-lg);
}

.case-card-link:hover .case-card,
.case-card-link:focus-visible .case-card {
  border-color: var(--accent);
}

.case-card:hover {
  border-color: var(--accent);
}

.case-card__body {
  flex: 1;
  min-width: 0;
}

.case-card__top {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  align-items: flex-start;
  margin-bottom: 0.45rem;
}

.case-card__title {
  font-size: 1rem;
  margin: 0;
}

.case-card__task {
  font-size: 0.88rem;
  color: var(--ink-2);
  margin: 0 0 0.85rem;
}

.case-card__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.metric {
  background: var(--metric-soft);
  border-radius: var(--radius);
  padding: 0.45rem 0.6rem;
  min-width: 5.5rem;
}

.metric__value {
  display: block;
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--metric);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.metric__label {
  display: block;
  font-size: 0.72rem;
  color: var(--ink-3);
  margin-top: 0.15rem;
}

.case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.12rem 0.5rem;
}

.section__more {
  margin-top: 1.25rem;
}

/* ---------- Support / plans ---------- */
.support-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.support-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--rail-old) 0 35%, var(--accent) 35% 100%);
}

.support-panel > * {
  position: relative;
}

.plans {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.35rem 0 1.25rem;
}

.plan {
  background: var(--surface-2);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.1rem;
  border: 1px solid transparent;
}

.plan--hl {
  background: var(--surface);
  border-color: var(--accent);
}

.plan__name {
  font-size: 1.05rem;
  margin: 0 0 0.2rem;
}

.plan__sub {
  font-size: 0.82rem;
  color: var(--ink-3);
  margin: 0 0 0.75rem;
  font-family: var(--mono);
}

.plan ul {
  margin: 0;
  padding-left: 1.05em;
  font-size: 0.9rem;
}

.plan li + li {
  margin-top: 0.25rem;
}

.support-panel__cta {
  text-align: center;
}

/* ---------- FAQ ---------- */
.faq {
  display: grid;
  gap: 0.55rem;
  max-width: 46rem;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--ink);
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  float: right;
  font-family: var(--mono);
  color: var(--accent);
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin: 0.7rem 0 0;
  font-size: 0.95rem;
}

/* ---------- CTA block ---------- */
.cta-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-block::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--rail-old) 0 40%, var(--accent) 40% 100%);
}

.cta-block h2 {
  font-size: 1.45rem;
}

/* ---------- Page / content ---------- */
.page-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 0 1.85rem;
}

.page-hero h1 {
  font-size: clamp(1.45rem, 2.6vw, 1.95rem);
  max-width: 20em;
  margin-bottom: 0.5rem;
}

.page-hero .lead {
  margin: 0;
  max-width: 40rem;
  font-size: 1.05rem;
}

.content-area {
  padding: 2.25rem 0 3.5rem;
}

.entry {
  max-width: 44rem;
}

.case-detail {
  max-width: 52rem;
}

.case-detail__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0 0 2rem;
}

.case-detail__metrics .metric {
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.case-detail__section {
  margin-top: 2rem;
}

.case-detail__section h2 {
  margin: 0 0 0.8rem;
}

.case-detail__section p {
  margin: 0;
}

.case-detail__section ul {
  margin: 0;
  padding-left: 1.25rem;
}

.case-detail__section li + li {
  margin-top: 0.55rem;
}

.case-detail__steps {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: case-step;
}

.case-detail__steps li {
  position: relative;
  padding: 1rem 1.1rem 1rem 3.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  counter-increment: case-step;
}

.case-detail__steps li::before {
  content: counter(case-step, decimal-leading-zero);
  position: absolute;
  top: 1rem;
  left: 1rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.case-detail__steps h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.case-detail__steps p {
  color: var(--ink-2);
}

.case-detail__outcomes {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.case-detail__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.entry h2 {
  font-size: 1.25rem;
  margin-top: 1.75rem;
}

.entry .imgsrvc {
  float: left;
  margin: 0 1.2rem 1rem 0;
  max-width: 200px;
}

.entry::after {
  content: "";
  display: table;
  clear: both;
}

.feature-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

.feature-list li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.35rem;
  border-bottom: 1px solid var(--border);
  color: var(--ink-2);
}

.feature-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 600;
}

.archive-notice {
  display: flex;
  gap: 0.75rem;
  background: var(--surface-2);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 1.35rem;
  font-size: 0.92rem;
  color: var(--ink-2);
}

/* ---------- Blog list ---------- */
.post-list {
  display: grid;
  gap: 0.75rem;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  transition: border-color var(--ease);
}

.post-card:hover {
  border-color: var(--accent);
}

.post-card h2 {
  font-size: 1.1rem;
  margin: 0 0 0.35rem;
}

.post-card h2 a {
  color: var(--ink);
  text-decoration: none;
}

.post-card h2 a:hover {
  color: var(--accent);
}

.post-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-3);
  margin-bottom: 0.4rem;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.75rem;
}

.pagination a,
.pagination span {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 0.88rem;
  color: var(--ink-2);
  text-decoration: none;
  font-family: var(--mono);
}

.pagination .current {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- Lead form ---------- */
.lead-form {
  max-width: 32rem;
  margin: 1.35rem auto 0;
  text-align: left;
}

.lead-form .field {
  margin-bottom: 0.9rem;
}

.lead-form label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
  color: var(--ink);
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font: inherit;
  background: var(--surface);
  color: var(--ink);
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.lead-form textarea {
  min-height: 110px;
  resize: vertical;
}

.form-message {
  padding: 0.8rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.93rem;
}

.form-message--ok {
  background: var(--metric-soft);
  color: var(--metric);
  border: 1px solid rgba(10, 107, 82, 0.25);
}

.form-message--err {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 1.75rem 0;
  margin-top: auto;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: flex-start;
}

.site-footer__copy {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-3);
}

.site-footer .nav-list {
  gap: 0.5rem 1.1rem;
}

.site-footer .nav-list a {
  font-size: 0.88rem;
}

.back-to-top {
  position: fixed;
  right: max(1.25rem, env(safe-area-inset-right));
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  z-index: 20;
  display: inline-flex;
  width: 2.9rem;
  height: 2.9rem;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: var(--accent);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgba(20, 34, 48, 0.12);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.4rem);
  transition: opacity var(--ease), transform var(--ease), color var(--ease), background var(--ease), border-color var(--ease), visibility var(--ease);
}

.back-to-top svg {
  width: 1.2rem;
  height: 1.2rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .svc-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .process-rail {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 0.6rem;
    padding-bottom: 0.35rem;
    -webkit-overflow-scrolling: touch;
  }

  .process-step {
    flex: 0 0 68%;
    max-width: 260px;
    scroll-snap-align: start;
  }

  .process-scroll-hint {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.6rem;
    color: var(--ink-3);
    font-size: 0.78rem;
  }

  .process-scroll-hint__track {
    display: block;
    width: 4rem;
    height: 3px;
    overflow: hidden;
    border-radius: 2px;
    background: var(--border);
  }

  .process-scroll-hint__track span {
    display: block;
    width: 35%;
    height: 100%;
    border-radius: inherit;
    background: var(--accent);
  }

  .plans {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .schema-panel {
    display: none;
  }

  .hero__grid {
    gap: 0;
  }

  .hero__title {
    font-size: clamp(2rem, 9vw, 3rem);
  }

  .hero__sub {
    margin-bottom: 1rem;
  }

  .svc-grid--overview {
    grid-template-columns: 1fr;
  }

  .svc-card--overview {
    min-height: 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header-h);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 0.65rem 1.25rem 1rem;
    gap: 0;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list a {
    display: block;
    padding: 0.55rem 0;
  }

  .site-header {
    position: sticky;
  }

  .case-detail__metrics {
    grid-template-columns: 1fr;
  }

  .pain-grid,
  .svc-grid,
  .case-grid {
    grid-template-columns: 1fr 1fr;
  }

  .svc-grid {
    grid-template-columns: 1fr 1fr;
  }

  .case-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 2.75rem 0;
  }

  .hero {
    padding: 2.5rem 0 2rem;
  }

  .entry .imgsrvc {
    float: none;
    margin: 0 0 1rem;
  }
}

@media (max-width: 480px) {
  .pain-grid,
  .svc-grid {
    grid-template-columns: 1fr;
  }
}