/* ═══════════════════════════════════════════
   MECHIRA.PL — Global Stylesheet
   Theme: Editorial B&W, institutional
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;700&family=Source+Sans+3:wght@300;400;500;600&display=swap');

:root {
  --black:   #0a0a0a;
  --ink:     #1a1a1a;
  --mid:     #555555;
  --rule:    #d4d4d4;
  --light:   #f0f0f0;
  --white:   #ffffff;
  --off:     #fafafa;

  --serif: 'Playfair Display', Georgia, serif;
  --sans:  'Source Sans 3', 'Helvetica Neue', sans-serif;

  --max: 1280px;
  --gutter: 2.5rem;
}

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

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

body {
  font-family: var(--sans);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

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

/* ── TYPOGRAPHY ── */

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.4rem, 4.5vw, 4rem); }
h2 { font-size: clamp(1.9rem, 3vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2vw, 1.7rem); }
h4 { font-size: 1.15rem; }

p { font-weight: 300; color: var(--mid); }

.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mid);
}

.eyebrow-rule {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.4rem;
}

.eyebrow-rule::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--ink);
  flex-shrink: 0;
}

/* ── LAYOUT ── */

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section { padding: 6rem 0; }

.section-header { margin-bottom: 3.5rem; }
.section-header h2 { margin-bottom: 1rem; }
.section-header p { max-width: 520px; font-size: 1.05rem; }

hr.rule {
  border: none;
  border-top: 1px solid var(--rule);
}

/* ── NAVIGATION ── */

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mid);
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover { color: var(--black); }

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--black);
  transition: width 0.25s;
}

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

.nav-contact {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--black);
  padding: 0.55rem 1.3rem;
  transition: background 0.2s;
}

.nav-contact:hover { background: var(--ink); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span { width: 22px; height: 1.5px; background: var(--black); display: block; }

/* ── HERO ── */

.hero {
  padding-top: 64px;
  background: var(--black);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 64px);
}

.hero-left {
  padding: 7rem var(--gutter) 6rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid rgba(255,255,255,0.12);
}

.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero-eyebrow::before {
  content: '';
  width: 28px; height: 1px;
  background: rgba(255,255,255,0.3);
  flex-shrink: 0;
}

.hero h1 {
  color: var(--white);
  font-size: clamp(2.6rem, 4vw, 3.8rem);
  margin-bottom: 2rem;
  font-weight: 400;
  line-height: 1.12;
  max-width: 520px;
}

.hero-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.55);
  max-width: 440px;
  line-height: 1.75;
  margin-bottom: 3rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.8rem 1.8rem;
  transition: all 0.2s;
  cursor: pointer;
  font-family: var(--sans);
  border: none;
}

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

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.35);
}
.btn-outline-white:hover { border-color: var(--white); }

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

.btn-outline {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--rule);
}
.btn-outline:hover { border-color: var(--ink); }

.hero-right {
  padding: 7rem var(--gutter) 6rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0;
}

.hero-stats {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.12);
}

.hero-stat {
  padding: 2rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.hero-stat-num {
  font-family: var(--serif);
  font-size: 2.8rem;
  font-weight: 400;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.hero-stat-label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}

/* ── ABOUT STRIP ── */

.about-strip {
  background: var(--off);
  padding: 5rem 0;
  border-bottom: 1px solid var(--rule);
}

.about-strip-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 6rem;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.about-strip h2 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); }

.about-strip p { font-size: 1rem; line-height: 1.8; }
.about-strip p + p { margin-top: 1rem; }

/* ── SERVICES ── */

.services { background: var(--white); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.service-item {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2.8rem 2.2rem;
  transition: background 0.2s;
}

.service-item:hover { background: var(--off); }

.service-num {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--rule);
  display: block;
  margin-bottom: 1.5rem;
  line-height: 1;
}

.service-item h3 {
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.8rem;
}

.service-item p { font-size: 0.9rem; line-height: 1.7; }

.service-gains {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.service-gains li {
  font-size: 0.82rem;
  color: var(--mid);
  padding-left: 1rem;
  position: relative;
}

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

/* ── APPROACH ── */

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

.approach .section-header h2 { color: var(--white); }
.approach .section-header p { color: rgba(255,255,255,0.5); }
.approach .eyebrow { color: rgba(255,255,255,0.4); }
.approach .eyebrow-rule::before { background: rgba(255,255,255,0.3); }

.approach-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.approach-step {
  padding: 3rem 2rem;
  border-right: 1px solid rgba(255,255,255,0.1);
}

.approach-step:last-child { border-right: none; }

.step-index {
  font-family: var(--serif);
  font-size: 3rem;
  color: rgba(255,255,255,0.1);
  line-height: 1;
  margin-bottom: 2rem;
}

.approach-step h3 {
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 0.8rem;
  font-weight: 500;
}

.approach-step p { font-size: 0.88rem; color: rgba(255,255,255,0.5); line-height: 1.7; }

/* ── INSIGHTS ── */

.insights { background: var(--off); }

.insights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.insight-card {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  transition: background 0.2s;
  cursor: pointer;
}

.insight-card:hover { background: var(--white); }

.insight-category {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 1rem;
  font-weight: 600;
}

.insight-card h3 {
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 0.9rem;
  color: var(--black);
}

.insight-card p {
  font-size: 0.88rem;
  line-height: 1.65;
  flex: 1;
}

.insight-meta {
  margin-top: 1.8rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.75rem;
  color: var(--mid);
  display: flex;
  justify-content: space-between;
  letter-spacing: 0.04em;
}

.insight-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--black);
  margin-top: 1.4rem;
  transition: gap 0.2s;
}

.insight-link:hover { gap: 0.7rem; }

/* ── REPORTS ── */

.reports { background: var(--white); }

.reports-list {
  border-top: 1px solid var(--rule);
}

.report-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--rule);
  transition: background 0.15s;
}

.report-row:hover { background: var(--off); padding-left: 1rem; padding-right: 1rem; margin: 0 -1rem; }

.report-year {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 0.4rem;
}

.report-row h3 { font-size: 1.05rem; font-weight: 500; margin-bottom: 0.4rem; }
.report-row p { font-size: 0.88rem; }

.report-dl {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--black);
  border: 1px solid var(--rule);
  padding: 0.6rem 1.2rem;
  white-space: nowrap;
  transition: border-color 0.2s, background 0.2s;
}

.report-dl:hover { border-color: var(--black); background: var(--black); color: var(--white); }

/* ── CONTACT ── */

.contact { background: var(--off); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 8rem;
  align-items: start;
}

.contact-info h2 { margin-bottom: 1.2rem; }
.contact-info p { margin-bottom: 2.5rem; font-size: 1rem; line-height: 1.75; }

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin-bottom: 1.2rem;
}

.contact-detail-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  font-weight: 600;
}

.contact-detail-val { font-size: 0.95rem; color: var(--ink); }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

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

.form-group { display: flex; flex-direction: column; gap: 0.5rem; }

.form-group label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid);
  font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--white);
  border: 1px solid var(--rule);
  padding: 0.85rem 1rem;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 300;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
  border-radius: 0;
  -webkit-appearance: none;
}

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

textarea { min-height: 130px; resize: vertical; }

.form-group select { cursor: pointer; }

/* ── FOOTER ── */

.site-footer {
  background: var(--black);
  color: rgba(255,255,255,0.45);
  padding: 4rem 0 3rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 2rem;
  gap: 3rem;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}

.footer-tagline {
  font-size: 0.82rem;
  margin-top: 0.5rem;
  max-width: 260px;
}

.footer-nav-col h4 {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: 1.2rem;
  font-weight: 600;
}

.footer-nav-col ul { display: flex; flex-direction: column; gap: 0.7rem; }

.footer-nav-col ul a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
  transition: color 0.2s;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ── ARTICLES PAGE ── */

.page-hero {
  padding-top: 64px;
  background: var(--black);
  color: var(--white);
  padding-bottom: 4rem;
}

.page-hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 5rem var(--gutter) 0;
}

.page-hero h1 { color: var(--white); margin-bottom: 1rem; }
.page-hero p { color: rgba(255,255,255,0.5); font-size: 1.05rem; max-width: 500px; }

.articles-section { background: var(--white); }

.articles-filter {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 3rem;
  overflow-x: auto;
}

.filter-btn {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mid);
  padding: 1rem 1.5rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--sans);
  transition: color 0.2s, border-color 0.2s;
}

.filter-btn.active,
.filter-btn:hover { color: var(--black); border-bottom-color: var(--black); }

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
  margin-bottom: 4rem;
}

.article-card {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  transition: background 0.2s;
  cursor: pointer;
}

.article-card:hover { background: var(--off); }

.article-category {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  font-weight: 600;
  margin-bottom: 0.8rem;
}

.article-card h3 {
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.35;
  margin-bottom: 0.8rem;
  color: var(--black);
}

.article-card p {
  font-size: 0.88rem;
  line-height: 1.65;
  flex: 1;
}

.article-meta {
  margin-top: 1.8rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.73rem;
  color: var(--mid);
  display: flex;
  justify-content: space-between;
}

.no-articles {
  grid-column: 1/-1;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 4rem 2rem;
  text-align: center;
  color: var(--mid);
}

.no-articles h3 { font-size: 1.2rem; margin-bottom: 0.5rem; color: var(--mid); font-family: var(--sans); font-weight: 400; }
.no-articles p { font-size: 0.9rem; }

/* loading state */
.loading-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
  margin-bottom: 4rem;
}

.skeleton-card {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2.5rem 2rem;
}

.skeleton {
  background: linear-gradient(90deg, var(--light) 25%, var(--off) 50%, var(--light) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 2px;
}

@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

/* ── RESPONSIVE ── */

@media (max-width: 1024px) {
  :root { --gutter: 1.75rem; }

  .hero-inner { grid-template-columns: 1fr; min-height: auto; }
  .hero-left { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.12); padding: 5rem var(--gutter) 4rem; }
  .hero-right { flex-direction: row; padding: 3rem var(--gutter); }
  .hero-stats { flex-direction: row; flex-wrap: wrap; border-top: none; gap: 0; }
  .hero-stat { flex: 1 1 140px; border-bottom: none; border-right: 1px solid rgba(255,255,255,0.12); padding: 1rem 2rem 1rem 0; margin-right: 2rem; }
  .hero-stat:last-child { border-right: none; }

  .about-strip-inner { grid-template-columns: 1fr; gap: 2rem; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .approach-grid { grid-template-columns: repeat(2, 1fr); }
  .approach-step { border-bottom: 1px solid rgba(255,255,255,0.1); }
  .insights-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 640px) {
  :root { --gutter: 1.25rem; }
  section { padding: 4rem 0; }

  .nav-links, .nav-contact { display: none; }
  .hamburger { display: flex; }

  .services-grid { grid-template-columns: 1fr; }
  .approach-grid { grid-template-columns: 1fr; }
  .approach-step { border-right: none; }
  .insights-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  .hero-stat { flex: 1 1 100%; border-right: none; border-bottom: 1px solid rgba(255,255,255,0.12); padding: 1rem 0; margin-right: 0; }
}