/* ============================================================
   Nanops Cloud — Main Stylesheet
   Inspired by McKinsey.com: clean, minimal, corporate
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* --- CSS Variables --- */
:root {
  --black:        #0A0A0A;
  --white:        #FFFFFF;
  --blue:         #0052A5;
  --blue-dark:    #003A78;
  --blue-light:   #E8F0FA;
  --gray-100:     #F7F7F7;
  --gray-200:     #EEEEEE;
  --gray-400:     #AAAAAA;
  --gray-600:     #666666;
  --gray-800:     #333333;
  --text:         #1A1A1A;
  --nav-height:   68px;
  --max-width:    1240px;
  --transition:   0.25s ease;
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4 { line-height: 1.15; font-weight: 600; letter-spacing: -0.02em; }

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }

p { color: var(--gray-800); font-size: 1rem; line-height: 1.75; }

.lead {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--gray-600);
  line-height: 1.7;
  max-width: 640px;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

section { padding: 96px 0; }

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--black);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-logo span {
  color: var(--blue);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  color: rgba(255,255,255,0.75);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--white); }

.nav-cta {
  background: var(--blue);
  color: var(--white) !important;
  padding: 10px 22px;
  font-size: 0.8rem !important;
  letter-spacing: 0.06em !important;
  transition: background var(--transition) !important;
}

.nav-cta:hover { background: var(--blue-dark) !important; color: var(--white) !important; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: transform var(--transition), opacity var(--transition);
}

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--black);
  padding: 24px 40px 32px;
  z-index: 999;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.nav-mobile.open { display: block; }

.nav-mobile a {
  display: block;
  color: rgba(255,255,255,0.75);
  font-size: 1rem;
  font-weight: 500;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: color var(--transition);
}

.nav-mobile a:hover { color: var(--white); }

.nav-mobile .nav-cta {
  margin-top: 20px;
  display: inline-block;
  border-bottom: none !important;
}

/* --- Hero --- */
.hero {
  padding-top: var(--nav-height);
  background: var(--black);
  color: var(--white);
  min-height: 88vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 45%;
  height: 100%;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 50%, transparent 100%);
  opacity: 0.15;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 80px 0;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 20px;
}

.hero h1 {
  color: var(--white);
  max-width: 760px;
  margin-bottom: 28px;
  font-weight: 300;
}

.hero h1 strong { font-weight: 700; }

.hero .lead {
  color: rgba(255,255,255,0.65);
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
}

.btn-primary:hover { background: var(--blue-dark); }

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.05);
}

.btn-dark {
  background: var(--black);
  color: var(--white);
}

.btn-dark:hover { background: var(--gray-800); }

.btn svg { flex-shrink: 0; }

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

/* Divider */
.divider {
  width: 56px;
  height: 3px;
  background: var(--blue);
  margin-bottom: 24px;
}

/* --- Section headings --- */
.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
}

/* --- Stats strip --- */
.stats-strip {
  background: var(--gray-100);
  padding: 56px 0;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.stat-item {
  padding: 0 40px;
  border-right: 1px solid var(--gray-200);
}

.stat-item:first-child { padding-left: 0; }
.stat-item:last-child { border-right: none; }

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-number span { color: var(--blue); }

.stat-label {
  font-size: 0.85rem;
  color: var(--gray-600);
  font-weight: 500;
}

/* --- Services section (home) --- */
.services-intro { background: var(--white); }

.services-intro .section-header {
  max-width: 560px;
  margin-bottom: 64px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--gray-200);
}

.service-card {
  background: var(--white);
  padding: 48px 40px;
  transition: background var(--transition);
  position: relative;
}

.service-card:hover { background: var(--gray-100); }

.service-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 24px;
  color: var(--blue);
}

.service-card h3 {
  margin-bottom: 14px;
  font-size: 1.15rem;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  transition: gap var(--transition);
}

.card-link:hover { gap: 14px; }

/* --- Featured case (home) --- */
.featured-case {
  background: var(--black);
  color: var(--white);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 520px;
}

.featured-case-content {
  padding: 80px 64px 80px 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-case-image {
  background: var(--blue-dark);
  position: relative;
  overflow: hidden;
  min-height: 480px;
}

.featured-case-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--blue) 0%, #001F4D 100%);
  opacity: 0.9;
}

.case-number {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 16px;
}

.featured-case h2 {
  color: var(--white);
  margin-bottom: 20px;
  font-weight: 300;
}

.featured-case h2 strong { font-weight: 700; }

.featured-case p { color: rgba(255,255,255,0.65); margin-bottom: 36px; }

/* --- Quote / CTA strip --- */
.quote-strip {
  background: var(--blue);
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}

.quote-strip blockquote {
  font-size: clamp(1.2rem, 2.5vw, 1.75rem);
  font-weight: 300;
  line-height: 1.5;
  max-width: 820px;
  margin: 0 auto 32px;
  color: var(--white);
}

.quote-strip blockquote strong { font-weight: 700; }

.quote-attr {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}

/* --- Page hero (inner pages) --- */
.page-hero {
  padding-top: var(--nav-height);
  background: var(--black);
  color: var(--white);
  padding-bottom: 80px;
}

.page-hero .container { padding-top: 72px; }

.page-hero h1 {
  color: var(--white);
  max-width: 680px;
  font-weight: 300;
  margin-bottom: 20px;
}

.page-hero h1 strong { font-weight: 700; }

.page-hero .lead { color: rgba(255,255,255,0.6); }

/* --- Services page --- */
.service-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  padding: 64px 0;
  border-top: 1px solid var(--gray-200);
  align-items: start;
}

.service-row:last-child { border-bottom: 1px solid var(--gray-200); }

.service-row-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
}

.service-row h3 {
  margin: 16px 0 12px;
  font-size: 1.25rem;
}

.service-bullets {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 32px;
}

.service-bullets li {
  font-size: 0.9rem;
  color: var(--gray-600);
  padding-left: 16px;
  position: relative;
}

.service-bullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--blue);
}

/* --- Cases page --- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--gray-200);
  margin-top: 64px;
}

.case-card {
  background: var(--white);
  padding: 48px 44px;
  transition: background var(--transition);
}

.case-card:hover { background: var(--gray-100); }

.case-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  border: 1px solid var(--blue);
  padding: 4px 10px;
  margin-bottom: 20px;
}

.case-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.case-card p {
  font-size: 0.9rem;
  color: var(--gray-600);
  margin-bottom: 20px;
}

.case-result {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--black);
  border-top: 1px solid var(--gray-200);
  padding-top: 16px;
  margin-top: 16px;
}

.case-result span {
  color: var(--blue);
  font-size: 1.2rem;
  font-weight: 700;
}

/* --- About page --- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-values {
  background: var(--gray-100);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--gray-200);
  margin-top: 56px;
}

.value-item {
  background: var(--white);
  padding: 40px 36px;
}

.value-item h4 {
  margin-bottom: 10px;
  font-size: 1rem;
}

.value-item p {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.65;
}

.team-strip {
  background: var(--white);
  border-top: 1px solid var(--gray-200);
}

/* --- Contact page --- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
}

.contact-info h2 { margin-bottom: 20px; }
.contact-info .lead { margin-bottom: 40px; }

.contact-detail {
  border-top: 1px solid var(--gray-200);
  padding: 20px 0;
}

.contact-detail:last-child { border-bottom: 1px solid var(--gray-200); }

.contact-detail-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 6px;
}

.contact-detail p {
  font-size: 0.95rem;
  color: var(--gray-800);
}

/* Contact form */
.contact-form { }

.form-group { margin-bottom: 24px; }

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-600);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  transition: border-color var(--transition);
  border-radius: 0;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
}

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

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* --- Footer --- */
.footer {
  background: var(--black);
  color: rgba(255,255,255,0.6);
  padding: 64px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 32px;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.footer-brand span { color: var(--blue); }

.footer-tagline {
  font-size: 0.875rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.45);
  max-width: 280px;
}

.footer-col h5 {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  padding: 5px 0;
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}

.footer-bottom a { color: rgba(255,255,255,0.3); transition: color var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* --- Utility --- */
.text-center { text-align: center; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

/* Visually spacious two-col text */
.two-col-text {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.two-col-text p { font-size: 0.95rem; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .container { padding: 0 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { padding-left: 0; border-right: 1px solid var(--gray-200); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .featured-case { grid-template-columns: 1fr; }
  .featured-case-image { min-height: 300px; }
  .featured-case-content { padding: 64px 40px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .about-intro { grid-template-columns: 1fr; gap: 48px; }
  .contact-layout { grid-template-columns: 1fr; gap: 56px; }
}

@media (max-width: 768px) {
  :root { --nav-height: 60px; }
  section { padding: 64px 0; }
  .container { padding: 0 20px; }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .hero-inner { padding: 56px 0; }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 24px 20px; border-right: none; border-bottom: 1px solid var(--gray-200); }

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

  .service-row { grid-template-columns: 1fr; gap: 24px; }
  .service-bullets { grid-template-columns: 1fr; }

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

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

  .two-col-text { grid-template-columns: 1fr; }

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

  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}