/* ==========================================================================
   KIN SHING LUNG MARINE PRODUCTS LIMITED
   Dark Kelp Theme — Computer Systems Design for the Marine Products Trade
   Palette: deep green-black #0F1512 | ivory #EDF3EC | kelp-green #357A56
            sea-mist #A9C8B4 | deep panel #16211B
   ========================================================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #EDF3EC;
  background: #0F1512;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: #A9C8B4;
  text-decoration: none;
}

a:hover {
  color: #EDF3EC;
}

ul {
  list-style: none;
}

/* ---- Scroll reveal (safe without JavaScript) ---- */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: none;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border: 1px solid #357A56;
  border-radius: 2px;
  font-size: 14px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn-primary {
  background: #357A56;
  color: #EDF3EC;
  border-color: #357A56;
}

.btn-primary:hover {
  background: #2C6B49;
  color: #EDF3EC;
}

.btn-outline {
  background: transparent;
  color: #A9C8B4;
  border-color: #357A56;
}

.btn-outline:hover {
  background: #357A56;
  color: #EDF3EC;
}

/* ---- Knot navigation ---- */
.knot-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #0F1512;
  border-bottom: 1px solid #357A56;
  padding: 14px 0;
  transition: box-shadow 0.25s ease;
}

.knot-nav.scrolled {
  box-shadow: 0 6px 18px #0A0E0C;
}

.knot-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.knot-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.knot-brand-glyph {
  width: 16px;
  height: 16px;
  background: #357A56;
  flex: none;
}

.knot-brand-text {
  display: block;
}

.knot-wordmark {
  display: block;
  color: #EDF3EC;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 4px;
  line-height: 1;
}

.knot-caption {
  display: block;
  color: #357A56;
  font-size: 10px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-top: 4px;
  font-weight: 700;
}

.knot-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.knot-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  height: 38px;
  padding: 0 10px;
  background: #16211B;
  border: 1px solid #357A56;
  color: #EDF3EC;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.knot-link::before,
.knot-link::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 1px;
  background: #357A56;
  pointer-events: none;
}

.knot-link::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.knot-link::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.knot-label {
  position: relative;
  z-index: 1;
}

.knot-link:hover {
  background: #1D2B22;
  color: #EDF3EC;
}

.knot-link.active {
  background: #357A56;
  color: #EDF3EC;
  border-color: #357A56;
}

.knot-link.active::before,
.knot-link.active::after {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: #16211B;
  border: 1px solid #357A56;
  padding: 10px 12px;
  cursor: pointer;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: #EDF3EC;
}

/* ---- Catch hero ---- */
.catch-hero {
  background: #0F1512;
  padding: 96px 0 72px;
}

.catch-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow-chip {
  display: inline-block;
  background: #357A56;
  color: #EDF3EC;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 8px 16px;
  margin-bottom: 28px;
}

.catch-hero h1 {
  color: #EDF3EC;
  font-size: 56px;
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.5px;
  max-width: 820px;
  margin-bottom: 24px;
}

.h1-accent {
  color: #357A56;
}

.hero-sub {
  max-width: 660px;
  color: #EDF3EC;
  font-size: 18px;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 84px;
}

/* ---- Market line and fish silhouettes ---- */
.market-line {
  border-bottom: 1px solid #357A56;
  padding-bottom: 34px;
  margin-bottom: 16px;
}

.fish-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.fish {
  position: relative;
  display: inline-block;
  width: 104px;
  height: 48px;
}

.fish-tail {
  position: absolute;
  left: 2px;
  top: 10px;
  width: 0;
  height: 0;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  border-right: 20px solid #357A56;
}

.fish-body {
  position: absolute;
  left: 22px;
  top: 0;
  width: 74px;
  height: 44px;
  border: 1px solid #357A56;
  border-radius: 50% 50% 45% 45%;
  background: transparent;
}

.fish-eye {
  position: absolute;
  left: 78px;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #EDF3EC;
}

.fish.filled .fish-body {
  background: #357A56;
  border-color: #357A56;
}

.fish.filled .fish-eye {
  background: #0F1512;
}

.market-captions {
  display: flex;
  justify-content: space-between;
}

.market-captions span {
  color: #A9C8B4;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  text-align: center;
  width: 104px;
}

/* ---- Section scaffolding ---- */
.section {
  padding: 96px 0;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.sec-kicker {
  color: #A9C8B4;
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 12px;
}

.sec-title {
  color: #EDF3EC;
  font-size: 40px;
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 20px;
}

.sec-intro {
  color: #EDF3EC;
  max-width: 760px;
  margin-bottom: 48px;
  font-size: 17px;
  line-height: 1.8;
}

/* ---- Catch rows ---- */
.catch-rows-section {
  background: #0F1512;
  padding: 96px 0 56px;
}

.catch-row {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  padding: 36px 0;
  border-top: 1px solid #357A56;
}

.catch-row:last-child {
  border-bottom: 1px solid #357A56;
}

.row-fish {
  position: relative;
  width: 64px;
  height: 30px;
  flex: none;
  margin-top: 6px;
}

.row-fish .fish-tail {
  left: 0;
  top: 6px;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-right: 13px solid #357A56;
}

.row-fish .fish-body {
  left: 13px;
  top: 0;
  width: 48px;
  height: 28px;
  border: 1px solid #357A56;
  border-radius: 50% 50% 45% 45%;
  background: #357A56;
}

.row-fish .fish-eye {
  left: 46px;
  top: 9px;
  width: 4px;
  height: 4px;
  background: #0F1512;
}

.catch-row-body {
  flex: 1;
}

.row-title {
  color: #EDF3EC;
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 8px;
}

.row-text {
  color: #EDF3EC;
  max-width: 820px;
}

.row-chip {
  flex: none;
  background: #357A56;
  color: #EDF3EC;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 7px 14px;
  margin-top: 6px;
}

/* ---- Grade strip ---- */
.grade-strip-section {
  background: #0C110D;
  padding: 96px 0;
}

.grade-tiles {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.grade-tile {
  background: #16211B;
  border: 1px solid #357A56;
  padding: 26px 18px;
}

.grade-tile-label {
  display: block;
  color: #EDF3EC;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.grade-tile-note {
  display: block;
  color: #EDF3EC;
  font-size: 13px;
  line-height: 1.6;
}

/* ---- Assurance rows ---- */
.assurance-section {
  background: #0F1512;
  padding: 96px 0 56px;
}

.assurance-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 32px 0;
  border-top: 1px solid #357A56;
}

.assurance-row:last-child {
  border-bottom: 1px solid #357A56;
}

.assurance-mark {
  flex: none;
  width: 18px;
  height: 18px;
  background: #357A56;
  margin-top: 7px;
}

.assurance-body {
  flex: 1;
}

.assurance-title {
  color: #EDF3EC;
  font-size: 21px;
  font-weight: 800;
  margin-bottom: 8px;
}

.assurance-text {
  color: #EDF3EC;
  max-width: 820px;
}

.assurance-chip {
  flex: none;
  background: #357A56;
  color: #EDF3EC;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 7px 14px;
  margin-top: 6px;
}

/* ---- CTA band ---- */
.cta-band {
  background: #357A56;
  padding: 88px 0;
}

.cta-band h2 {
  color: #EDF3EC;
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.cta-band p {
  color: #EDF3EC;
  max-width: 640px;
  margin-bottom: 32px;
  font-size: 17px;
  line-height: 1.8;
}

.cta-band .btn-outline {
  color: #EDF3EC;
  border-color: #EDF3EC;
}

.cta-band .btn-outline:hover {
  background: #EDF3EC;
  color: #357A56;
}

/* ---- Secondary page hero ---- */
.page-hero {
  background: #0F1512;
  padding: 84px 0 64px;
}

.page-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-kicker {
  color: #A9C8B4;
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 14px;
}

.page-hero h1 {
  color: #EDF3EC;
  font-size: 46px;
  line-height: 1.12;
  font-weight: 800;
  margin-bottom: 18px;
}

.page-lead {
  color: #EDF3EC;
  font-size: 17px;
  line-height: 1.8;
  max-width: 760px;
}

/* ---- Services page ---- */
.services-section {
  background: #0F1512;
  padding: 56px 0 40px;
}

.service-block {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  padding: 40px 0;
  border-top: 1px solid #357A56;
}

.service-block:last-of-type {
  border-bottom: 1px solid #357A56;
}

.service-index {
  color: #A9C8B4;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 2px;
}

.service-block h2 {
  color: #EDF3EC;
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 14px;
}

.service-block p {
  color: #EDF3EC;
  margin-bottom: 12px;
}

.service-block p:last-child {
  margin-bottom: 0;
}

.service-tag {
  display: inline-block;
  background: #357A56;
  color: #EDF3EC;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 12px;
  margin-top: 10px;
  font-weight: 700;
}

.process-section {
  background: #0C110D;
  padding: 88px 0;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.process-step {
  background: #16211B;
  border: 1px solid #357A56;
  padding: 24px 20px;
}

.process-num {
  display: block;
  color: #357A56;
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 10px;
}

.process-step h3 {
  color: #EDF3EC;
  font-size: 16px;
  margin-bottom: 8px;
}

.process-step p {
  color: #EDF3EC;
  font-size: 13px;
  line-height: 1.65;
}

/* ---- Contact page ---- */
.contact-section {
  background: #0F1512;
  padding: 72px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}

.contact-info h2,
.contact-form h2 {
  color: #EDF3EC;
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 20px;
}

.contact-info p {
  color: #EDF3EC;
  margin-bottom: 28px;
}

.contact-detail {
  margin-bottom: 24px;
  padding-left: 20px;
  border-left: 1px solid #357A56;
}

.contact-detail-label {
  display: block;
  color: #A9C8B4;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-weight: 700;
}

.contact-detail-value {
  color: #EDF3EC;
  font-size: 16px;
  line-height: 1.7;
}

.contact-detail-value a {
  color: #EDF3EC;
  text-decoration: underline;
}

.business-hours {
  background: #16211B;
  border: 1px solid #357A56;
  padding: 22px 24px;
  margin-top: 28px;
}

.business-hours h3 {
  color: #EDF3EC;
  font-size: 16px;
  margin-bottom: 12px;
}

.business-hours p {
  color: #EDF3EC;
  font-size: 14px;
  margin-bottom: 6px;
}

.contact-form {
  background: #16211B;
  border: 1px solid #357A56;
  padding: 32px;
}

.form-field {
  margin-bottom: 20px;
}

.form-field label {
  display: block;
  color: #A9C8B4;
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 700;
}

.form-field input,
.form-field textarea {
  width: 100%;
  background: #0F1512;
  border: 1px solid #357A56;
  color: #EDF3EC;
  font-size: 16px;
  padding: 12px 14px;
  font-family: inherit;
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: #A9C8B4;
}

.form-status {
  color: #A9C8B4;
  font-size: 14px;
  margin-top: 14px;
}

/* ---- FAQ accordion ---- */
.faq-section {
  background: #0C110D;
  padding: 80px 0;
}

.faq-item {
  background: #16211B;
  border: 1px solid #357A56;
  margin-bottom: 14px;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  color: #EDF3EC;
  font-size: 17px;
  font-weight: 700;
  padding: 18px 22px;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-question::after {
  content: "+";
  color: #357A56;
  font-size: 22px;
  line-height: 1;
  flex: none;
}

.faq-item.open .faq-question::after {
  content: "-";
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer p {
  color: #EDF3EC;
  padding: 0 22px 20px;
  font-size: 15px;
  line-height: 1.75;
}

/* ---- Catch footer ---- */
.catch-footer {
  background: #0F1512;
  border-top: 1px solid #357A56;
  padding: 56px 0 40px;
}

.footer-row-1 {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #EDF3EC;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.footer-links a:hover {
  color: #A9C8B4;
}

.footer-contact {
  color: #A9C8B4;
  font-size: 13px;
}

.footer-rule {
  max-width: 1200px;
  margin: 32px auto 0;
  padding: 24px 24px 0;
  border-top: 1px solid #357A56;
  position: relative;
}

.footer-legal {
  color: #EDF3EC;
  font-size: 13px;
  text-align: center;
  line-height: 1.7;
}

.footer-legal a {
  color: #A9C8B4;
  text-decoration: underline;
}

.footer-legal a:hover {
  color: #EDF3EC;
}

.footer-fish {
  position: absolute;
  left: 24px;
  top: 28px;
  width: 32px;
  height: 15px;
}

.footer-fish .fish-tail {
  left: 0;
  top: 3px;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-right: 8px solid #357A56;
}

.footer-fish .fish-body {
  left: 8px;
  top: 0;
  width: 23px;
  height: 14px;
  border: 1px solid #357A56;
  border-radius: 50% 50% 45% 45%;
  background: #357A56;
}

.footer-fish .fish-eye {
  left: 24px;
  top: 4px;
  width: 2px;
  height: 2px;
  background: #0F1512;
}

/* ---- Responsive ---- */
@media (max-width: 1000px) {
  .grade-tiles {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .knot-links {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 10px;
  }

  .knot-nav.open .knot-links {
    display: flex;
    padding-top: 14px;
  }

  .knot-link {
    width: 100%;
    height: 44px;
  }

  .catch-hero h1 {
    font-size: 40px;
  }

  .sec-title {
    font-size: 32px;
  }

  .catch-row {
    flex-wrap: wrap;
    gap: 16px;
  }

  .row-chip,
  .assurance-chip {
    order: 3;
  }

  .assurance-row {
    flex-wrap: wrap;
    gap: 16px;
  }

  .service-block {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .service-index {
    margin-bottom: 4px;
  }

  .cta-band h2 {
    font-size: 30px;
  }

  .page-hero h1 {
    font-size: 36px;
  }

  .fish {
    width: 72px;
    height: 34px;
  }

  .fish-body {
    left: 15px;
    top: 0;
    width: 52px;
    height: 31px;
  }

  .fish-tail {
    left: 1px;
    top: 7px;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 14px solid #357A56;
  }

  .fish-eye {
    left: 55px;
    top: 10px;
    width: 4px;
    height: 4px;
  }

  .market-captions span {
    width: 72px;
  }

  .footer-rule {
    padding-left: 0;
    padding-right: 0;
  }

  .footer-fish {
    display: none;
  }
}

@media (max-width: 560px) {
  .grade-tiles {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .catch-hero {
    padding: 72px 0 56px;
  }

  .catch-hero h1 {
    font-size: 34px;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .btn {
    text-align: center;
  }

  .section,
  .catch-rows-section,
  .grade-strip-section,
  .assurance-section {
    padding: 64px 0;
  }

  .sec-title {
    font-size: 28px;
  }

  .contact-form {
    padding: 22px;
  }
}