/* ============================================================
   SiLing — Computer Systems Design
   Light theme · warm blush-ivory / dark espresso · ROSE accent
   ============================================================ */

:root {
  --rose: #F43F5E;
  --rose-deep: #BE123C;
  --rose-light: #FDA4AF;
  --blush: #FFF1F2;
  --bg: #F8F4F1;
  --surface: #FFFFFF;
  --ink: #2A1A22;
  --ink-soft: #6B565C;
  --ink-mute: #8A7178;
  --line: #EADFD8;
  --font-heading: Georgia, "Times New Roman", "Songti SC", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-size: 16px;
  font-family: var(--font-body);
  line-height: 1.7;
  color: var(--ink);
  background-color: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--ink);
  line-height: 1.15;
  margin: 0 0 0.5em;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

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

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

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   RIBBON NAVIGATION
   ============================================================ */

.ribbon-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
}

.ribbon-nav .ribbon-main {
  position: relative;
  z-index: 2;
  background-color: var(--rose);
  clip-path: polygon(0 0, 100% 0, calc(100% - 30px) 100%, 30px 100%);
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 56px;
}

.ribbon-nav .ribbon-under {
  position: relative;
  z-index: 1;
  height: 11px;
  margin-top: -3px;
  background-color: var(--rose-deep);
  clip-path: polygon(44px 0, calc(100% - 44px) 0, 100% 100%, 0 100%);
}

.ribbon-brand {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.ribbon-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.ribbon-links a {
  color: #FFFFFF;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.2px;
  padding: 6px 2px;
  position: relative;
}

.ribbon-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: #FFFFFF;
  transition: width 0.2s ease;
}

.ribbon-links a:hover::after {
  width: 100%;
}

.ribbon-cta {
  background-color: var(--ink);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 14px;
  padding: 11px 22px;
  border-radius: 999px;
  white-space: nowrap;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.ribbon-cta:hover {
  background-color: var(--rose-deep);
  transform: translateY(-2px);
}

.ribbon-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 8px;
}

.ribbon-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  border-radius: 2px;
  background-color: #FFFFFF;
}

/* ============================================================
   PETAL-CLUSTER HERO
   ============================================================ */

.petal-hero {
  background-color: var(--bg);
  padding: 96px 0 80px;
  overflow: hidden;
}

.petal-hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 40px;
}

.hero-eyebrow {
  display: inline-block;
  background-color: var(--blush);
  color: var(--rose-deep);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.hero-title {
  font-size: 52px;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}

.hero-sub {
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  padding: 15px 30px;
  border-radius: 8px;
  border: 0;
  cursor: pointer;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background-color: var(--rose);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--rose-deep);
  box-shadow: 0 12px 26px -12px var(--rose-deep);
}

.btn-ghost {
  background-color: transparent;
  color: var(--rose-deep);
  border: 2px solid var(--rose);
}

.btn-ghost:hover {
  background-color: var(--blush);
}

.btn-light {
  background-color: #FFFFFF;
  color: var(--rose-deep);
}

.btn-light:hover {
  background-color: var(--blush);
}

/* Petal visual */

.petal-visual {
  position: relative;
  min-height: 380px;
}

.petal-visual::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 320px;
  height: 320px;
  transform: translate(-50%, -50%);
  background-color: var(--blush);
  border-radius: 50%;
}

.petal-flower {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  animation: float 6s ease-in-out infinite;
}

.petal {
  position: absolute;
  width: 60px;
  height: 112px;
  left: -30px;
  top: -112px;
  border-radius: 50%;
  transform-origin: 30px 112px;
}

.petal.p1 { transform: rotate(0deg);   background-color: var(--rose); }
.petal.p2 { transform: rotate(60deg);  background-color: var(--rose-light); }
.petal.p3 { transform: rotate(120deg); background-color: var(--rose-deep); }
.petal.p4 { transform: rotate(180deg); background-color: var(--rose); }
.petal.p5 { transform: rotate(240deg); background-color: var(--rose-light); }
.petal.p6 { transform: rotate(300deg); background-color: var(--rose-deep); }

.flower-center {
  position: absolute;
  width: 50px;
  height: 50px;
  left: -25px;
  top: -25px;
  border-radius: 50%;
  background-color: var(--rose-deep);
  box-shadow: 0 0 0 10px #FFFFFF, 0 0 0 14px var(--rose-light);
}

.petal-bud {
  position: absolute;
  width: 0;
  height: 0;
  animation: float 7s ease-in-out infinite;
}

.bud-a { top: 12%; left: 74%; }
.bud-b { top: 74%; left: 86%; animation-delay: 1.2s; }
.bud-c { bottom: 8%; left: 48%; animation-delay: 2.4s; }

.petal-bud .petal {
  width: 32px;
  height: 58px;
  left: -16px;
  top: -58px;
  transform-origin: 16px 58px;
  background-color: var(--rose-light);
}

.petal-bud .petal.pb1 { transform: rotate(0deg); }
.petal-bud .petal.pb2 { transform: rotate(120deg); background-color: var(--rose); }
.petal-bud .petal.pb3 { transform: rotate(240deg); }

.bud-center {
  position: absolute;
  width: 24px;
  height: 24px;
  left: -12px;
  top: -12px;
  border-radius: 50%;
  background-color: var(--rose-deep);
  box-shadow: 0 0 0 5px #FFFFFF;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ============================================================
   SECTION HEAD
   ============================================================ */

.section-head {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-kicker {
  color: var(--rose-deep);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 38px;
  margin-bottom: 16px;
}

.section-lead {
  color: var(--ink-soft);
  font-size: 18px;
}

/* ============================================================
   STATEMENT ROW (full-width)
   ============================================================ */

.statement-row {
  background-color: var(--ink);
  color: var(--bg);
  padding: 96px 0;
}

.statement-row .container {
  max-width: 920px;
}

.statement-kicker {
  color: var(--rose-light);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.statement-heading {
  color: #FFFFFF;
  font-size: 40px;
  margin-bottom: 28px;
}

.statement-body {
  color: #F0E5E8;
  font-size: 19px;
  line-height: 1.8;
  margin-bottom: 28px;
}

.statement-signature {
  color: var(--rose-light);
  font-size: 15px;
  margin: 0;
}

/* ============================================================
   STAT COLUMNS (big numerals)
   ============================================================ */

.stats-section {
  background-color: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 72px 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-num {
  display: block;
  font-family: var(--font-heading);
  font-size: 62px;
  font-weight: 700;
  color: var(--rose);
  line-height: 1;
  margin-bottom: 12px;
}

.stat-label {
  color: var(--ink-soft);
  font-size: 16px;
  font-weight: 600;
}

/* ============================================================
   PROCESS LIST (numbered with connecting lines)
   ============================================================ */

.process-section {
  background-color: var(--bg);
  padding: 96px 0;
}

.process-list {
  max-width: 820px;
}

.process-item {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 28px;
  position: relative;
  padding-bottom: 44px;
}

.process-item:last-child {
  padding-bottom: 0;
}

.process-num {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background-color: var(--blush);
  border: 2px solid var(--rose-light);
  color: var(--rose-deep);
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.process-item::before {
  content: "";
  position: absolute;
  left: 37px;
  top: 76px;
  bottom: -44px;
  width: 2px;
  background-color: var(--rose-light);
}

.process-item:last-child::before {
  display: none;
}

.process-text h3 {
  font-size: 26px;
  margin-bottom: 10px;
}

.process-text p {
  color: var(--ink-soft);
  font-size: 17px;
  margin: 0;
}

/* ============================================================
   SERVICES
   ============================================================ */

.services-section {
  background-color: var(--blush);
  padding: 96px 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 32px 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 34px -18px var(--rose);
}

.service-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--rose-light);
  display: inline-block;
}

.service-card p {
  color: var(--ink-soft);
  margin: 0;
}

/* ============================================================
   COMPARISON TABLE
   ============================================================ */

.compare-section {
  background-color: var(--surface);
  padding: 96px 0;
}

.compare-table {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.compare-head,
.compare-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
}

.compare-head {
  background-color: var(--ink);
  color: #FFFFFF;
}

.compare-col {
  padding: 18px 24px;
  font-size: 16px;
  display: flex;
  align-items: center;
}

.compare-head .compare-col {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  justify-content: center;
  text-align: center;
}

.compare-head .compare-blank {
  justify-content: flex-start;
}

.compare-head .compare-highlight {
  background-color: var(--rose);
  color: #FFFFFF;
}

.compare-row {
  border-top: 1px solid var(--line);
}

.compare-row:first-of-type {
  border-top: 0;
}

.compare-row .compare-label {
  font-weight: 700;
  color: var(--ink);
}

.compare-row .compare-col {
  color: var(--ink-soft);
}

.compare-row .compare-highlight {
  background-color: var(--blush);
  color: var(--ink);
  font-weight: 600;
  border-left: 2px solid var(--rose);
}

/* ============================================================
   FAQ ACCORDION
   ============================================================ */

.faq-section {
  background-color: var(--bg);
  padding: 96px 0;
}

.faq-list {
  max-width: 820px;
}

.faq-item {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-question::after {
  content: "+";
  font-size: 28px;
  font-weight: 400;
  color: var(--rose);
  line-height: 1;
  transition: transform 0.2s ease;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 400px;
}

.faq-answer p {
  margin: 0;
  padding: 0 24px 24px;
  color: var(--ink-soft);
}

/* ============================================================
   CONTACT
   ============================================================ */

.contact-section {
  background-color: var(--blush);
  padding: 96px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
  align-items: start;
}

.contact-details p {
  color: var(--ink-soft);
  font-size: 18px;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-label {
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 700;
}

.contact-list a {
  font-size: 18px;
  font-weight: 700;
  color: var(--rose-deep);
}

.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 32px;
}

.contact-form label {
  display: block;
  margin-bottom: 20px;
}

.contact-form label span {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--ink);
  background-color: var(--bg);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--rose);
  outline-offset: 1px;
  border-color: var(--rose);
}

.form-note {
  margin: 16px 0 0;
  font-weight: 700;
  color: var(--rose-deep);
}

/* ============================================================
   CTA BAND (split)
   ============================================================ */

.cta-band {
  background-color: var(--ink);
  padding: 80px 0;
}

.cta-band-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 40px;
}

.cta-copy h2 {
  color: #FFFFFF;
  font-size: 34px;
  margin-bottom: 12px;
}

.cta-copy p {
  color: #F0E5E8;
  font-size: 17px;
  margin: 0;
}

/* ============================================================
   FOOTER (compact multi-column with thin rose top rule)
   ============================================================ */

.site-footer {
  background-color: var(--ink);
  color: #F0E5E8;
  border-top: 4px solid var(--rose);
  padding: 56px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid #4A3942;
}

.footer-wordmark {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  color: #FFFFFF;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  color: #C9B8BE;
  max-width: 280px;
}

.footer-col h3 {
  color: #FFFFFF;
  font-size: 15px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-col a,
.footer-col span {
  display: block;
  color: #C9B8BE;
  margin-bottom: 10px;
  font-size: 15px;
}

.footer-col a:hover {
  color: var(--rose-light);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  color: #A8949C;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: #A8949C;
}

.footer-links a:hover {
  color: var(--rose-light);
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */

.fade-up {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .petal-hero-inner {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .petal-visual {
    min-height: 320px;
    order: -1;
  }

  .hero-title {
    font-size: 40px;
  }

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 24px;
  }

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

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

  .cta-band-inner {
    grid-template-columns: 1fr;
  }

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

  .ribbon-toggle {
    display: flex;
  }

  .ribbon-nav .ribbon-main {
    clip-path: none;
    padding: 12px 24px;
    flex-wrap: wrap;
  }

  .ribbon-nav .ribbon-under {
    display: none;
  }

  .ribbon-links {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0 4px;
  }

  .ribbon-links.open {
    display: flex;
  }

  .ribbon-links a {
    padding: 12px 0;
    width: 100%;
    border-bottom: 1px solid var(--rose-light);
  }

  .ribbon-links a::after {
    display: none;
  }

  .ribbon-cta {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 32px;
  }

  .hero-sub {
    font-size: 17px;
  }

  .section-title {
    font-size: 30px;
  }

  .statement-heading {
    font-size: 30px;
  }

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

  .stat-num {
    font-size: 46px;
  }

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

  .process-item {
    grid-template-columns: 64px 1fr;
    gap: 18px;
  }

  .process-num {
    width: 60px;
    height: 60px;
    font-size: 18px;
  }

  .process-item::before {
    left: 29px;
    top: 60px;
  }

  .compare-head .compare-col,
  .compare-row .compare-col {
    padding: 12px 14px;
    font-size: 14px;
  }

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