/* =========================================
   QuantumApex AI — style.css
   Synchronised with index.html structure
   Theme: Dark institutional / Quantitative finance
   v1.1 — Added language switcher styles
   ========================================= */

/* ================= RESET & ROOT ================= */

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

:root {
  --void:        #06080D;
  --surface:     #0D1018;
  --card:        #111520;
  --card-border: #1E2535;
  --gold:        #B8973A;
  --gold-hi:     #D4AF55;
  --gold-dim:    #7A6228;
  --gold-glow:   rgba(184, 151, 58, 0.15);
  --muted:       #4A5568;
  --text-dim:    #8896A8;
  --text:        #C8D0DC;
  --white:       #EEF2F7;
  --radius:      6px;
  --radius-lg:   12px;
  --transition:  .25s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", system-ui, sans-serif;
  background: var(--void);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}


/* ================= SIGNAL BAR ================= */

.signal-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 1000;
  background: var(--card);
  overflow: hidden;
}

.signal-bar::after {
  content: "";
  position: absolute;
  top: 0;
  left: -40%;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--gold-hi), transparent);
  animation: scan 3s ease-in-out infinite;
}

@keyframes scan {
  0%   { left: -40%; }
  100% { left: 140%; }
}


/* ================= NAVBAR ================= */

.navbar {
  position: sticky;
  top: 2px;
  z-index: 900;
  background: rgba(6, 8, 13, .88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--white);
  text-transform: uppercase;
}

.logo span {
  color: var(--gold-hi);
}

/* Wrapper that holds nav + lang-switcher on the right */
.navbar-right {
  display: flex;
  align-items: center;
}

nav {
  display: flex;
  gap: 32px;
}

nav a {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--transition);
}

nav a:hover {
  color: var(--gold-hi);
}


/* ================= LANGUAGE SWITCHER ================= */

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0;
  margin-left: 24px;
  flex-shrink: 0;
}

.lang-btn {
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  font-family: "Inter", system-ui, sans-serif;
  line-height: 1;
}

/* Left button rounded left corners only */
.lang-btn:first-child {
  border-radius: var(--radius) 0 0 var(--radius);
  border-right: none;
}

/* Right button rounded right corners only */
.lang-btn:last-child {
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* Active / selected state */
.lang-btn.active {
  background: var(--gold-glow);
  border-color: var(--gold-dim);
  color: var(--gold-hi);
}

/* Hover on inactive */
.lang-btn:hover:not(.active) {
  border-color: var(--gold-dim);
  color: var(--text);
}

/* Remove default focus outline; keep accessible ring */
.lang-btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}


/* ================= HERO ================= */

.hero {
  padding: 120px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(184, 151, 58, .07) 0%, transparent 70%);
  pointer-events: none;
}

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}

.hero h1 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: clamp(52px, 8vw, 92px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.01em;
  color: var(--white);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.hero h1 span {
  color: var(--gold-hi);
}

.hero-subtitle {
  font-family: "Barlow Condensed", sans-serif;
  font-size: clamp(18px, 3vw, 26px);
  font-weight: 300;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 28px;
}

.hero-desc {
  max-width: 540px;
  font-size: 16px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-cta-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--gold);
  color: #08090C;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
}

.button:hover {
  background: var(--gold-hi);
  transform: translateY(-1px);
}

.button-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius);
  transition: border-color var(--transition), color var(--transition);
}

.button-ghost:hover {
  border-color: var(--gold-dim);
  color: var(--gold-hi);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 100px;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: .04em;
}

.badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  flex-shrink: 0;
}


/* ================= STATUS BAR ================= */

.status-inner {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
  background: var(--card);
}

.status-item {
  flex: 1;
  min-width: 160px;
  padding: 20px 28px;
  border-right: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.status-item:last-child {
  border-right: none;
}

.status-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.status-value {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  letter-spacing: .02em;
}

.status-value.live {
  color: #4ADE80;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ADE80;
  position: relative;
  flex-shrink: 0;
}

.pulse::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid #4ADE80;
  animation: ripple 2s ease-out infinite;
}

@keyframes ripple {
  0%   { transform: scale(.6);  opacity: 1; }
  100% { transform: scale(2.2); opacity: 0; }
}


/* ================= SHARED SECTION UTILITIES ================= */

section {
  padding: 96px 0;
}

.section-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}

.section-title {
  font-family: "Barlow Condensed", sans-serif;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--white);
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 14px;
}

.section-sub {
  font-size: 15px;
  color: var(--text-dim);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 56px;
}


/* ================= WHY / TECHNOLOGY ================= */

.why {
  background: var(--surface);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--card-border);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-card {
  background: var(--card);
  padding: 36px 32px;
  position: relative;
  transition: background var(--transition);
}

.feature-card:hover {
  background: #141924;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  transition: background var(--transition);
}

.feature-card:hover::before {
  background: var(--gold);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--gold-glow);
  border: 1px solid rgba(184, 151, 58, .2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 18px;
}

.feature-card h3 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.65;
}


/* ================= AI ARCHITECTURE ================= */

.architecture {
  background: var(--void);
}

.arch-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.arch-pipeline {
  display: flex;
  flex-direction: column;
}

.arch-step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.arch-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 32px;
}

.arch-node {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--gold-dim);
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--gold);
  font-weight: 600;
  font-family: "Barlow Condensed", sans-serif;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.arch-step.highlight .arch-node {
  border-color: var(--gold-hi);
  background: var(--gold-glow);
  color: var(--gold-hi);
}

.arch-line {
  width: 1px;
  flex: 1;
  min-height: 28px;
  background: linear-gradient(to bottom, var(--gold-dim), transparent);
}

.arch-content {
  padding: 4px 0 32px;
}

.arch-content h4 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 4px;
}

.arch-content p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}

.arch-aside {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.arch-aside h3 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 20px;
}

.arch-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--card-border);
}

.arch-stat:last-child {
  border-bottom: none;
}

.arch-stat-label {
  font-size: 12.5px;
  color: var(--text-dim);
}

.arch-stat-value {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--gold-hi);
  letter-spacing: .04em;
}


/* ================= FEATURES ================= */

.features {
  background: var(--surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.feat-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition);
}

.feat-item:hover {
  border-color: var(--gold-dim);
}

.feat-num {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--gold-dim);
  letter-spacing: .1em;
  flex-shrink: 0;
  width: 28px;
  padding-top: 2px;
}

.feat-text h4 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 5px;
}

.feat-text p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}


/* ================= HOW IT WORKS / PROCESS ================= */

.how {
  background: var(--void);
}

.how-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.how-steps::before {
  content: "";
  position: absolute;
  top: 28px;
  left: calc(12.5% + 16px);
  right: calc(12.5% + 16px);
  height: 1px;
  background: linear-gradient(to right, var(--gold-dim), var(--gold), var(--gold-dim));
}

.how-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 16px;
}

.how-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--card);
  border: 2px solid var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Barlow Condensed", sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--gold-hi);
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.how-step h3 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 8px;
}

.how-step p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 180px;
}


/* ================= PERFORMANCE ================= */

.performance {
  background: var(--surface);
}

.performance-header {
  margin-bottom: 32px;
}

.report-frame {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.report-topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: #0A0C12;
  border-bottom: 1px solid var(--card-border);
}

.report-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.report-dot.green  { background: #30D158; }
.report-dot.yellow { background: #FFD60A; }
.report-dot.red    { background: #FF453A; }

.report-url {
  flex: 1;
  font-size: 11.5px;
  color: var(--text-dim);
  margin-left: 8px;
  letter-spacing: .02em;
}

.report-live {
  font-size: 11px;
  font-weight: 600;
  color: #4ADE80;
  letter-spacing: .1em;
}

.report-body iframe {
  width: 100%;
  height: 700px;
  border: none;
  display: block;
}


/* ================= ROADMAP ================= */

.roadmap {
  background: var(--void);
}

.roadmap-track {
  display: flex;
  align-items: flex-start;
  position: relative;
  margin-top: 48px;
}

.roadmap-track::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: var(--card-border);
}

.roadmap-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 8px;
}

.roadmap-node {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--card);
  border: 2px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.roadmap-step.done .roadmap-node {
  background: var(--gold-glow);
  border-color: var(--gold);
}

.roadmap-step.active .roadmap-node {
  background: rgba(74, 222, 128, .1);
  border-color: #4ADE80;
}

.roadmap-node svg {
  width: 16px;
  height: 16px;
}

.roadmap-label {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}

.roadmap-step.done .roadmap-label {
  color: var(--gold);
}

.roadmap-step.active .roadmap-label {
  color: #4ADE80;
}


/* ================= RISK DISCLOSURE ================= */

.risk-disclosure {
  background: var(--void);
  border-top: 1px solid var(--card-border);
  padding: 40px 0;
}

.risk-inner {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.risk-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.risk-inner h4 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.risk-inner p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.65;
}


/* ================= FOOTER ================= */

footer {
  background: #040508;
  border-top: 1px solid var(--card-border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

footer h3 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--white);
}

footer h3 span {
  color: var(--gold-hi);
}

footer p {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.footer-meta {
  text-align: right;
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.8;
}


/* ================= REDUCED MOTION ================= */

@media (prefers-reduced-motion: reduce) {
  .signal-bar::after,
  .pulse::after {
    animation: none;
  }
}


/* ================= RESPONSIVE — TABLET (≤900px) ================= */

@media (max-width: 900px) {
  .arch-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .how-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .how-steps::before {
    display: none;
  }
}


/* ================= RESPONSIVE — MOBILE (≤640px) ================= */

@media (max-width: 640px) {
  .hero {
    padding: 80px 0 64px;
  }

  nav {
    gap: 16px;
  }

  .lang-switcher {
    margin-left: 12px;
  }

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

  /* Status bar stacks vertically */
  .status-inner {
    flex-direction: column;
  }

  .status-item {
    border-right: none;
    border-bottom: 1px solid var(--card-border);
  }

  .status-item:last-child {
    border-bottom: none;
  }

  /* Roadmap stacks vertically */
  .roadmap-track {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .roadmap-track::before {
    display: none;
  }

  .roadmap-step {
    flex-direction: row;
    text-align: left;
    gap: 16px;
  }

  .roadmap-node {
    margin-bottom: 0;
    flex-shrink: 0;
  }

  /* Footer stacks */
  .footer-inner {
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }

  /* Performance iframe shorter on mobile */
  .report-body iframe {
    height: 520px;
  }
}


/* ================= RESPONSIVE — SMALL MOBILE (≤480px) ================= */

@media (max-width: 480px) {
  nav {
    gap: 10px;
  }

  nav a {
    font-size: 10px;
  }

  .lang-btn {
    padding: 3px 7px;
    font-size: 10px;
  }
}