/* ============================================================
   NAYU TECHNOLOGIES — Shared Design System
   Single source of truth for all pages.
   Referenced by: index.html, about.html, contact.html, blog.html
   ============================================================ */

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

/* ─── DESIGN TOKENS ─── */
:root {
  --bg:           #080C14;
  --bg-card:      #0D1220;
  --bg-surface:   #111826;
  --bg-subtle:    #161E2E;
  --accent:       #00C9A7;
  --accent-dim:   rgba(0,201,167,0.12);
  --accent-glow:  rgba(0,201,167,0.06);
  --blue:         #3B7CF4;
  --blue-dim:     rgba(59,124,244,0.1);
  --border:       rgba(255,255,255,0.07);
  --border-accent:rgba(0,201,167,0.3);
  --text:         #EEF0F5;
  --text-muted:   #7A8499;
  --text-subtle:  #4A5468;
  --serif: 'Instrument Serif', Georgia, serif;
  --sans:  'Outfit', sans-serif;
  --mono:  'DM Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── NOISE OVERLAY ─── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0; opacity: 0.5;
}

/* ─── TYPOGRAPHY ─── */
h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.15; }
.display      { font-size: clamp(3.2rem, 7vw, 6rem); letter-spacing: -0.02em; }
.section-title{ font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -0.015em; }
.card-title   { font-size: 1.25rem; font-family: var(--sans); font-weight: 600; }
em            { font-style: italic; color: var(--accent); }

.label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}

/* ─── LAYOUT ─── */
.container        { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.container--narrow{ max-width: 800px;  margin: 0 auto; padding: 0 2rem; }
section           { position: relative; z-index: 1; }

/* ─── NAV ─── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.25rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: rgba(8,12,20,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background 0.3s;
}

.nav-logo {
  display: flex; align-items: center; gap: 0.6rem;
  text-decoration: none; color: var(--text);
  font-weight: 600; font-size: 1rem; letter-spacing: -0.01em;
}

.nav-logo-mark {
  width: 30px; height: 30px;
  background: var(--accent);
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif);
  font-size: 1rem; color: #080C14; font-weight: 400;
}

.nav-links {
  display: flex; align-items: center; gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted); text-decoration: none;
  font-size: 0.875rem; font-weight: 400;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }

/* ─── HAMBURGER & MOBILE MENU ─── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px; height: 20px;
  padding: 0; border: none; background: transparent;
  cursor: pointer;
}
.nav-hamburger span {
  display: block; height: 2px; width: 100%;
  background: var(--text); border-radius: 999px;
  transition: transform 0.25s, opacity 0.25s;
}

.mobile-menu {
  display: none;
  position: fixed; inset: 0; z-index: 200;
  background: rgba(8,12,20,0.97);
  backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center; justify-content: center;
  gap: 2rem;
  list-style: none;
}
.mobile-menu.open { display: flex; }

.mobile-menu a {
  color: var(--text); text-decoration: none;
  font-size: 1.4rem; font-weight: 500;
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--accent); }

.mobile-menu-close {
  position: absolute; top: 1.5rem; right: 2rem;
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 1.5rem;
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  border-radius: 6px;
  font-family: var(--sans); font-size: 0.875rem; font-weight: 500;
  text-decoration: none; cursor: pointer; transition: all 0.2s;
  border: none;
}
.btn-primary { background: var(--accent); color: #080C14; }
.btn-primary:hover { background: #00e0bc; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.04); }

/* ─── HERO (shared base) ─── */
#hero {
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 7rem 2rem 6rem;
  position: relative; overflow: hidden;
}
.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,201,167,0.08) 0%, transparent 70%);
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  pointer-events: none;
}
.hero-glow-2 {
  position: absolute;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(59,124,244,0.06) 0%, transparent 70%);
  top: 20%; right: 10%;
  pointer-events: none;
}
.hero-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4rem; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  margin-bottom: 1.5rem;
}
.hero-badge-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}
.hero-title {
  font-size: clamp(3rem, 5.5vw, 5rem);
  letter-spacing: -0.025em;
  line-height: 1.08;
  margin-bottom: 1.5rem;
}
.hero-title span { color: var(--text-muted); }
.hero-desc {
  color: var(--text-muted); font-size: 1.05rem; line-height: 1.7;
  max-width: 480px; margin-bottom: 2.5rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ─── STATS GRID ─── */
.hero-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
  align-self: start;
  margin-top: 2rem;
}
.stat-cell {
  background: var(--bg-card);
  padding: 2rem 1.75rem;
}
.stat-cell:hover { background: var(--bg-subtle); }
.stat-num {
  font-family: var(--serif);
  font-size: 3rem; letter-spacing: -0.03em;
  color: var(--text); line-height: 1;
  margin-bottom: 0.4rem;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* ─── TICKER ─── */
.ticker-wrap {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 0;
  background: var(--bg-card);
}
.ticker {
  display: flex; gap: 0;
  animation: ticker 28s linear infinite;
  white-space: nowrap;
}
.ticker-item {
  display: inline-flex; align-items: center; gap: 1rem;
  padding: 0 2rem;
  font-size: 0.8rem; color: var(--text-subtle);
  letter-spacing: 0.05em;
  font-family: var(--mono);
}
.ticker-item::after {
  content: '';
  width: 4px; height: 4px;
  background: var(--accent);
  border-radius: 50%;
  margin-left: 1rem;
}
@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ─── SECTION SPACING ─── */
.section        { padding: 6rem 0; }
.section--tight { padding: 4rem 0; }
.section-header {
  display: flex; flex-direction: column; gap: 1rem;
  margin-bottom: 4rem;
}
.section-header--center { align-items: center; text-align: center; }
.section-desc {
  max-width: 560px;
  color: var(--text-muted); font-size: 1rem; line-height: 1.7;
}

/* ─── SERVICES GRID ─── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}
.service-card {
  background: var(--bg-card);
  padding: 2.5rem 2rem;
  display: flex; flex-direction: column; gap: 1.25rem;
  transition: background 0.25s;
  position: relative; overflow: hidden;
}
.service-card:hover { background: var(--bg-subtle); }
.service-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.service-card:hover::before { opacity: 1; }
.service-icon {
  width: 44px; height: 44px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.service-body { color: var(--text-muted); font-size: 0.875rem; line-height: 1.65; }
.service-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: auto; }
.tag {
  padding: 0.25rem 0.6rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.7rem; color: var(--text-subtle);
  font-family: var(--mono);
}

/* ─── PROCESS STEPS ─── */
.process-steps {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 2rem; left: 2.5rem; right: 2.5rem; height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--blue), var(--accent));
  z-index: 0;
}
.process-step { padding: 0 2rem; position: relative; z-index: 1; }
.step-num {
  width: 3rem; height: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 0.75rem; color: var(--accent);
  margin-bottom: 1.5rem;
}
.step-title { font-family: var(--sans); font-weight: 600; margin-bottom: 0.6rem; font-size: 1rem; }
.step-desc  { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ─── TRAINING CARDS ─── */
.training-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.training-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  display: flex; flex-direction: column; gap: 1rem;
  transition: border-color 0.25s, transform 0.25s;
}
.training-card:hover { border-color: rgba(0,201,167,0.25); transform: translateY(-2px); }
.training-level {
  display: inline-flex;
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  font-size: 0.7rem; font-weight: 500;
  font-family: var(--mono);
  letter-spacing: 0.05em;
  width: fit-content;
}
.level-beginner    { background: rgba(0,201,167,0.1);  color: var(--accent); }
.level-intermediate{ background: rgba(59,124,244,0.1); color: #6BA3FF; }
.level-advanced    { background: rgba(168,85,247,0.1); color: #C084FC; }
.level-executive   { background: rgba(234,179,8,0.1);  color: #FBBF24; }
.training-duration { margin-top: auto; font-size: 0.78rem; color: var(--text-subtle); font-family: var(--mono); }

/* ─── SECTORS TABS ─── */
.sectors-layout {
  display: grid; grid-template-columns: 300px 1fr; gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 20px; overflow: hidden;
  min-height: 500px;
}
.sector-tabs { background: var(--bg-card); }
.sector-tab {
  padding: 1.25rem 1.75rem;
  display: flex; align-items: center; gap: 0.75rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
  font-size: 0.9rem; color: var(--text-muted);
}
.sector-tab:hover, .sector-tab.active { background: var(--bg-subtle); color: var(--text); }
.sector-tab.active { border-left: 2px solid var(--accent); }
.sector-content { background: var(--bg-card); padding: 3rem 2.5rem; display: none; }
.sector-content.active { display: flex; flex-direction: column; gap: 1.5rem; }
.sector-features { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.sector-feature {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 0.875rem; color: var(--text-muted);
  padding: 0.75rem 1rem;
  background: var(--bg-subtle);
  border-radius: 8px;
}
.feature-dot { width: 5px; height: 5px; background: var(--accent); border-radius: 50%; flex-shrink: 0; }

/* ─── BLOG PREVIEW GRID ─── */
.blog-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 20px; overflow: hidden;
}
.blog-card {
  background: var(--bg-card);
  padding: 2.5rem 2rem;
  display: flex; flex-direction: column; gap: 1rem;
  transition: background 0.25s; cursor: pointer;
  text-decoration: none; color: inherit;
}
.blog-card:hover { background: var(--bg-subtle); }
.blog-tag {
  font-family: var(--mono); font-size: 0.68rem;
  letter-spacing: 0.1em; color: var(--accent);
  text-transform: uppercase;
}
.blog-title { font-family: var(--serif); font-size: 1.4rem; line-height: 1.3; color: var(--text); }
.blog-card--small .blog-title { font-size: 1.05rem; }
.blog-meta {
  margin-top: auto;
  font-size: 0.78rem; color: var(--text-subtle);
  font-family: var(--mono);
  display: flex; gap: 1rem;
}

/* ─── CTA SECTION ─── */
.cta-section {
  padding: 8rem 2rem;
  text-align: center; position: relative; overflow: hidden;
}
.cta-glow {
  position: absolute;
  width: 800px; height: 200px;
  background: radial-gradient(ellipse, rgba(0,201,167,0.07) 0%, transparent 65%);
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.cta-title { font-size: clamp(2.4rem, 5vw, 4rem); margin-bottom: 1.25rem; letter-spacing: -0.02em; }
.cta-desc  { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 2.5rem; }

/* ─── FOOTER ─── */
footer {
  border-top: 1px solid var(--border);
  padding: 4rem 2rem 2.5rem;
  background: var(--bg-card);
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}
.footer-desc { color: var(--text-muted); font-size: 0.875rem; margin-top: 1rem; line-height: 1.7; }
.footer-col h4 {
  font-family: var(--sans); font-weight: 600; font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-subtle); margin-bottom: 1.25rem;
}
.footer-col ul  { list-style: none; display: flex; flex-direction: column; gap: 0.7rem; }
.footer-col a   { color: var(--text-muted); text-decoration: none; font-size: 0.875rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.78rem; color: var(--text-subtle);
}
.footer-socials { display: flex; gap: 1rem; }
.footer-socials a {
  color: var(--text-subtle); text-decoration: none;
  font-size: 0.78rem; font-family: var(--mono);
  transition: color 0.2s;
}
.footer-socials a:hover { color: var(--accent); }

/* ─── DIVIDER ─── */
.section-divider {
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border) 20%, var(--border) 80%, transparent 100%);
}

/* ─── SCROLL ANIMATIONS ─── */
.fade-up {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }
.fade-up:nth-child(6) { transition-delay: 0.5s; }

/* ─── ABOUT PAGE ─── */
.about-grid  { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; padding: 5rem 0; }
.about-text  { font-size: 1.05rem; color: var(--text-muted); line-height: 1.8; }
.about-values{ display: flex; flex-direction: column; gap: 1.75rem; margin-top: 2rem; }
.about-value { display: flex; gap: 1rem; align-items: flex-start; }
.about-value-icon {
  font-size: 1.4rem;
  width: 44px; height: 44px;
  flex-shrink: 0;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.about-value h4  { font-family: var(--sans); font-weight: 600; margin-bottom: 0.3rem; }
.about-value p   { font-size: 0.875rem; color: var(--text-muted); }
.team-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  display: flex; flex-direction: column; gap: 0.5rem;
  transition: border-color 0.25s;
}
.team-card:hover { border-color: var(--border-accent); }
.team-avatar {
  width: 44px; height: 44px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 0.75rem; color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.team-card h4 { font-family: var(--sans); font-weight: 600; font-size: 0.95rem; }
.team-card .role { font-size: 0.75rem; color: var(--accent); font-family: var(--mono); }
.team-card p  { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; margin-top: 0.25rem; }

/* ─── CONTACT PAGE ─── */
.contact-header { max-width: 800px; margin: 0 auto 4rem; text-align: center; position: relative; z-index: 2; }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.4fr;
  gap: 4rem; align-items: start; margin-top: 3rem;
}
.form-group  { margin-bottom: 1.25rem; }
.form-label  {
  display: block; font-size: 0.82rem; font-weight: 500;
  color: var(--text-muted); margin-bottom: 0.5rem;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.form-input  {
  width: 100%; background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px; color: var(--text);
  font-family: var(--sans); font-size: 0.95rem;
  padding: 0.85rem 1.1rem;
  transition: all 0.2s; outline: none;
}
.form-input:focus {
  border-color: var(--accent); background: var(--bg-subtle);
  box-shadow: 0 0 0 3px rgba(0,201,167,0.08);
}
textarea.form-input { resize: vertical; min-height: 130px; }
select.form-input option { background: var(--bg-card); }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px; padding: 2rem;
}
.contact-info-item {
  display: flex; align-items: flex-start; gap: 1rem;
  padding: 1.2rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 1rem;
  transition: all 0.2s;
}
.contact-info-item:hover { border-color: var(--accent); }
.contact-info-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--accent-dim); border: 1px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.contact-info-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-subtle); margin-bottom: 0.3rem; }
.contact-info-value { font-size: 0.9rem; color: var(--text); }
.contact-info-value a { color: var(--accent); text-decoration: none; }
.contact-info-value a:hover { text-decoration: underline; }
.service-features { display: flex; flex-direction: column; gap: 0.6rem; }
.service-feature  { display: flex; align-items: center; gap: 0.6rem; font-size: 0.875rem; color: var(--text-muted); }
.service-feature::before { content: '→'; color: var(--accent); font-weight: 600; }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .hero-inner        { grid-template-columns: 1fr; }
  .hero-stats        { display: none; }
  .services-grid     { grid-template-columns: 1fr; }
  .training-grid     { grid-template-columns: 1fr 1fr; }
  .sectors-layout    { grid-template-columns: 1fr; }
  .sector-tabs       { display: flex; overflow-x: auto; }
  .sector-tab        { border-bottom: none; border-right: 1px solid var(--border); white-space: nowrap; }
  .blog-grid         { grid-template-columns: 1fr; }
  .footer-inner      { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .process-steps     { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .process-steps::before { display: none; }
  .about-grid        { grid-template-columns: 1fr; }
  .team-grid         { grid-template-columns: 1fr 1fr; }
  .contact-grid      { grid-template-columns: 1fr; gap: 2rem; }
  nav .nav-links     { display: none; }
  .nav-hamburger     { display: flex; }
}

@media (max-width: 600px) {
  .training-grid  { grid-template-columns: 1fr; }
  .team-grid      { grid-template-columns: 1fr; }
  .footer-inner   { grid-template-columns: 1fr; }
  .footer-bottom  { flex-direction: column; gap: 1rem; text-align: center; }
}