/* ============================================================
   Sumati Enterprises — Stylesheet
   Simple, clean light theme · single blue accent · mobile-first
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f6f8;
  --bg-card: #ffffff;
  --bg-card-hover: #fafbfc;
  --border: #e3e6ea;
  --border-strong: #c9ced6;

  --text: #1a1f26;
  --text-muted: #4d5763;
  --text-dim: #77818d;

  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --accent-soft: #eef2fb;
  --accent-border: #b9c8f2;

  --radius: 10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow: 0 4px 16px rgba(16, 24, 40, 0.08);

  --container: 1140px;
  --header-h: 68px;

  --font-sans: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 1rem;
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

ul {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

/* ---------- Utilities ---------- */
.container {
  width: min(var(--container), 92%);
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.section {
  padding: 4rem 0;
}

.section-head {
  max-width: 680px;
  margin-bottom: 2.25rem;
}

.section-head h2,
.about-copy h2,
.contact-info h2,
.faq-intro h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.section-sub {
  color: var(--text-muted);
  font-size: 1.02rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  text-decoration: none;
}

.btn-ghost {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--bg);
}

.btn-ghost:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

.btn-block {
  display: block;
  width: 100%;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-name {
  font-weight: 700;
  font-size: 1rem;
}

.brand-tag {
  font-size: 0.68rem;
  color: var(--text-dim);
}

/* Nav toggle (mobile) */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  cursor: pointer;
}

.nav-toggle .bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Primary nav (mobile: dropdown panel) */
.primary-nav {
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 4%;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.primary-nav.open {
  max-height: 420px;
  padding: 1rem 4% 1.4rem;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.nav-list a {
  display: block;
  padding: 0.7rem 0.4rem;
  color: var(--text);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}

.nav-list a:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-list .nav-cta {
  border: none;
  color: var(--accent);
}

/* ---------- Hero ---------- */
.hero {
  padding: 3.5rem 0 4.5rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  gap: 2.25rem;
}

.hero-content h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin-bottom: 1rem;
  color: var(--text);
}

.hero-sub {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 1.6rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.hero-facts li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.fact-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Hero visual */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-figure {
  margin: 0;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

/* Quick answer block (AEO) */
.quick-answer {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  align-self: start;
}

.qa-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.qa-heading {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.qa-text {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin-bottom: 1.2rem;
}

.qa-score {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.qa-score-item {
  display: flex;
  flex-direction: column;
}

.score-num {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}

.score-cap {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ---------- About / Entity ---------- */
.about {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  gap: 2rem;
}

.lead-answer {
  font-size: 1.12rem;
  color: var(--text);
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin-bottom: 1rem;
}

.about-copy p:not(.eyebrow, .lead-answer) {
  color: var(--text-muted);
}

.key-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
}

.fact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
}

.fact-card dt {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.fact-card dd {
  font-weight: 600;
  color: var(--text);
}

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.service-card:hover {
  border-color: var(--accent-border);
  background: var(--bg-card-hover);
}

.card-figure {
  margin: 0;
  border-bottom: 1px solid var(--border);
}

.card-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-border);
  margin: 0 1.5rem;
}

.service-card h3 {
  font-size: 1.15rem;
  color: var(--text);
  padding: 0 1.5rem;
}

.service-card ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  flex-grow: 1;
  padding: 0 1.5rem;
}

.service-card li {
  position: relative;
  padding-left: 1.2rem;
}

.service-card li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.card-link {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--accent);
  margin: 0 1.5rem 1.5rem;
}

.card-link:hover {
  color: var(--accent-hover);
  text-decoration: none;
}

/* ---------- Deliverables ---------- */
.deliverables {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.deliverables-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.deliverables-table th,
.deliverables-table td {
  padding: 1rem 1.2rem;
  text-align: left;
  vertical-align: top;
  font-size: 0.97rem;
}

.deliverables-table thead th {
  background: var(--bg-soft);
  color: var(--text);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
}

.deliverables-table tbody th {
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}

.deliverables-table tbody tr:nth-child(even) {
  background: var(--bg-soft);
}

.deliverables-table tbody tr {
  border-bottom: 1px solid var(--border);
}

.deliverables-table tbody tr:last-child {
  border-bottom: none;
}

.process-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.process-step {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
}

.step-num {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
}

/* ---------- Featured Work ---------- */
.work {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.work-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.work-figure {
  margin: 0;
  background: var(--bg);
}

.work-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.work-body {
  padding: 0 1.6rem 1.8rem;
}

.work-body .eyebrow {
  margin-bottom: 0.5rem;
}

.work-body h3 {
  font-size: 1.5rem;
  color: var(--text);
  margin-bottom: 0.6rem;
}

.work-desc {
  color: var(--text-muted);
  margin-bottom: 1.1rem;
  max-width: 520px;
}

.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.4rem;
}

.work-tags li {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
}

/* ---------- FAQ ---------- */
.faq {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.faq-layout {
  display: grid;
  gap: 2.25rem;
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.accordion-heading {
  font-size: 1rem;
}

.accordion-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1rem 1.1rem;
  background: transparent;
  border: none;
  text-align: left;
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.98rem;
}

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

.accordion-icon {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 1.05rem;
  transition: transform 0.2s ease, background 0.15s ease, color 0.15s ease;
}

.accordion-item.open .accordion-icon {
  transform: rotate(45deg);
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.accordion-panel {
  padding: 0 1.1rem;
}

.accordion-panel p {
  color: var(--text-muted);
  font-size: 0.97rem;
  padding: 0.9rem 0 1rem;
  border-top: 1px solid var(--border);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  gap: 2.25rem;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1.5rem 0;
}

.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.contact-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.contact-list a {
  color: var(--text);
  font-weight: 600;
}

.contact-list a:hover {
  color: var(--accent);
  text-decoration: none;
}

.brand-statement {
  font-style: italic;
  font-size: 1.05rem;
  color: var(--text);
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin-top: 1.5rem;
}

/* Contact form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.form-group label span {
  color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.85rem;
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-group select {
  cursor: pointer;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.form-group input.invalid,
.form-group textarea.invalid {
  border-color: #dc2626;
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.12);
}

.form-note {
  margin-top: 0.85rem;
  font-size: 0.88rem;
  color: var(--text-dim);
  text-align: center;
}

.form-status {
  margin-top: 0.85rem;
  font-size: 0.92rem;
  font-weight: 600;
  text-align: center;
}

.form-status.ok {
  color: #16a34a;
}

.form-status.err {
  color: #dc2626;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.94rem;
  margin-top: 0.9rem;
  max-width: 320px;
}

.site-footer h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 0.8rem;
}

.footer-nav ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.95rem;
}

.footer-nav a {
  color: var(--text-muted);
}

.footer-nav a:hover {
  color: var(--accent);
}

.footer-contact li {
  color: var(--text-muted);
}

.footer-contact a {
  color: var(--text-muted);
}

.footer-contact a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ---------- Responsive (>= 720px) ---------- */
@media (min-width: 720px) {
  .nav-toggle {
    display: none;
  }

  .primary-nav {
    position: static;
    max-height: none;
    overflow: visible;
    background: transparent;
    border: none;
    padding: 0;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: 1.6rem;
  }

  .nav-list a {
    padding: 0;
    border: none;
    font-size: 0.95rem;
  }

  .nav-list .nav-cta {
    padding: 0.5rem 1.1rem;
    border: 1px solid var(--accent-border);
    border-radius: 7px;
    background: var(--accent-soft);
    color: var(--accent);
  }

  .nav-list a.active {
    color: var(--accent);
    font-weight: 700;
  }

  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 3rem;
  }

  .work-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .work-card {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .work-card .work-body {
    padding: 1.6rem 1.7rem 1.8rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    flex-grow: 1;
  }

  .work-card .work-desc {
    flex-grow: 1;
  }

  .work-body {
    padding: 2rem 2.2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .key-facts {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .process-strip {
    grid-template-columns: repeat(4, 1fr);
  }

  .faq-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
    align-items: start;
  }

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

  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

/* ---------- Responsive (>= 1024px) ---------- */
@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 3rem;
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}