/* ============================================================
   Quotex Signal — Design System v5
   Brand: Quotex-style dark theme, cyan/green accents
   Production-grade, mobile-first, SEO-optimized
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@500;600;700&display=swap');

/* ----- Design Tokens ----- */
:root {
  /* Dark theme (default — Quotex brand) */
  --bg: #0a0e17;
  --bg-alt: #0f141f;
  --surface: #141a26;
  --surface-hover: #1a2132;
  --surface-raised: #1b2234;
  --border: #1e2840;
  --border-strong: #2a3654;
  --border-focus: #00d4aa;

  --text: #e6e9f0;
  --text-secondary: #8b95b0;
  --text-muted: #556080;
  --text-inverse: #0a0e17;

  /* Quotex brand colors */
  --brand: #00d4aa;
  --brand-hover: #00bf98;
  --brand-soft: rgba(0, 212, 170, 0.08);
  --brand-glow: rgba(0, 212, 170, 0.2);

  --green: #00d4aa;
  --green-hover: #00bf98;
  --green-soft: rgba(0, 212, 170, 0.1);
  --green-border: rgba(0, 212, 170, 0.25);

  --red: #ff4757;
  --red-hover: #e63946;
  --red-soft: rgba(255, 71, 87, 0.1);
  --red-border: rgba(255, 71, 87, 0.25);

  --amber: #ffa502;
  --amber-soft: rgba(255, 165, 2, 0.1);
  --amber-border: rgba(255, 165, 2, 0.25);

  --neutral: #5f6b85;
  --neutral-soft: rgba(95, 107, 133, 0.08);
  --neutral-border: #2a354d;

  --info: #45aaf2;
  --info-soft: rgba(69, 170, 242, 0.1);

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  /* Elevation */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.4), 0 0 1px rgba(0,0,0,0.3);
  --shadow: 0 4px 16px rgba(0,0,0,0.5), 0 0 2px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --glow-brand: 0 0 20px var(--brand-glow);

  /* Radii */
  --radius-xs: 3px;
  --radius-sm: 5px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Layout */
  --max-w: 1280px;
  --header-h: 58px;

  /* Animations */
  --transition-fast: 120ms ease;
  --transition: 200ms ease;
}

/* ----- Reset ----- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;color-scheme:dark}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px;border-radius:var(--radius-xs)}
:focus:not(:focus-visible){outline:none}

/* ----- Utility ----- */
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;top:-100px;left:16px;z-index:999;padding:10px 20px;background:var(--brand);color:var(--text-inverse);border-radius:var(--radius-sm);font-weight:700}
.skip-link:focus{top:16px}
.container{max-width:var(--max-w);margin:0 auto;padding:0 20px}
.tabular-nums{font-variant-numeric:tabular-nums}
.text-brand{color:var(--brand)}

/* ----- Typography ----- */
h1{font-size:2.25rem;font-weight:900;letter-spacing:-0.03em;line-height:1.15}
h2{font-size:1.5rem;font-weight:800;letter-spacing:-0.02em;line-height:1.25}
h3{font-size:1.15rem;font-weight:700;letter-spacing:-0.01em;line-height:1.35}
h4{font-size:1rem;font-weight:600;line-height:1.4}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  background:rgba(10,14,23,0.85);border-bottom:1px solid var(--border);
  position:relative;z-index:100;height:var(--header-h);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
}
.header-inner{
  max-width:var(--max-w);margin:0 auto;padding:0 20px;
  height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.header-brand{display:flex;align-items:center;gap:10px}
.header-logo{width:36px;height:36px;border-radius:var(--radius-sm);flex-shrink:0}
.header-brand-text{font-weight:800;font-size:1.1rem;letter-spacing:-0.01em;margin:0}
.header-tagline{font-size:0.75rem;color:var(--brand);margin-left:6px;white-space:nowrap}
.header-right{display:flex;align-items:center;gap:16px}
.header-status{display:flex;align-items:center;gap:8px;font-size:0.8125rem;color:var(--text-secondary)}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--green);position:relative}
.status-dot::after{content:'';position:absolute;inset:-3px;border-radius:50%;background:var(--green);opacity:0.3;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:0.3}50%{transform:scale(2.5);opacity:0}}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero{padding:48px 0 40px;text-align:center;position:relative;overflow:hidden}
.hero::before{
  content:'';position:absolute;top:-200px;left:50%;transform:translateX(-50%);
  width:600px;height:600px;background:radial-gradient(circle,var(--brand-glow) 0%,transparent 70%);
  pointer-events:none;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;margin-bottom:16px;
  padding:5px 14px;border:1px solid var(--green-border);
  border-radius:var(--radius-full);font-size:0.8125rem;font-weight:600;
  color:var(--brand);background:var(--brand-soft);
}
.hero-title{font-size:2.75rem;margin-bottom:12px;position:relative;z-index:1}
.hero-title span{color:var(--brand)}
.hero-subtitle{font-size:1.1rem;color:var(--text-secondary);max-width:580px;margin:0 auto 24px;line-height:1.6}
.hero-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 28px;background:var(--brand);color:var(--text-inverse);
  border-radius:var(--radius-sm);font-weight:700;font-size:0.9375rem;
  transition:all var(--transition-fast);box-shadow:var(--glow-brand);
}
.hero-cta:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 0 30px var(--brand-glow)}

/* ============================================================
   DASHBOARD SECTION
   ============================================================ */
.dashboard-section{padding:0 0 48px}
.section-header{margin-bottom:20px}
.section-title{font-size:1.35rem;display:flex;align-items:center;gap:10px}
.section-badge{
  font-size:0.75rem;font-weight:700;padding:3px 10px;
  background:var(--brand-soft);color:var(--brand);
  border-radius:var(--radius-full);
}

/* Stats bar */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}
.stat-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px 18px;
  box-shadow:var(--shadow-xs);
}
.stat-card-label{font-size:0.6875rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.05em;font-weight:600;margin-bottom:4px}
.stat-card-value{font-size:1.5rem;font-weight:800;font-variant-numeric:tabular-nums}
.stat-card-value.green{color:var(--green)}
.stat-card-value.red{color:var(--red)}
.stat-card-value.amber{color:var(--amber)}
.stat-card-sub{font-size:0.75rem;color:var(--text-muted);margin-top:2px}

/* Controls */
.controls-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.controls-left{display:flex;align-items:center;gap:10px}
.pair-search{
  padding:8px 14px;font-size:0.8125rem;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius-sm);
  color:var(--text);outline:none;width:180px;
}
.pair-search::placeholder{color:var(--text-muted)}
.pair-search:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px var(--brand-soft)}
.signal-filter{display:flex;border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.filter-btn{
  padding:6px 12px;font-size:0.75rem;font-weight:600;
  border-right:1px solid var(--border);color:var(--text-muted);
  transition:all var(--transition-fast);
}
.filter-btn:last-child{border-right:none}
.filter-btn:hover{color:var(--text);background:var(--surface-hover)}
.filter-btn.active{background:var(--brand);color:var(--text-inverse);border-color:var(--brand)}
.tf-pills{display:flex;gap:3px;background:var(--bg-alt);padding:3px;border:1px solid var(--border);border-radius:var(--radius-sm)}
.tf-pill{padding:5px 11px;font-size:0.75rem;font-weight:600;border-radius:var(--radius-xs);color:var(--text-muted);transition:all var(--transition-fast);white-space:nowrap}
.tf-pill:hover{color:var(--text);background:var(--surface-hover)}
.tf-pill.active{background:var(--brand);color:var(--text-inverse);box-shadow:var(--glow-brand)}

/* Signal grid — card-based, responsive columns */
.signal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 12px;
}
@media (max-width: 1100px) {
  .signal-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .signal-grid { grid-template-columns: 1fr; }
}
.sig-badge{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:44px;padding:3px 10px;border-radius:var(--radius-full);
  font-size:0.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:0.05em;
}
.sig-badge.call{background:var(--green-soft);color:var(--green);border:1px solid var(--green-border)}
.sig-badge.put{background:var(--red-soft);color:var(--red);border:1px solid var(--red-border)}
.sig-badge.wait{background:transparent;color:var(--neutral);border:1px solid var(--neutral-border)}
.sig-strength{display:block;font-size:0.625rem;color:var(--text-muted);margin-top:1px;font-weight:500}

/* ============================================================
   FAQ / SEO CONTENT
   ============================================================ */
.seo-section{padding:48px 0 64px;border-top:1px solid var(--border)}
.seo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:20px}
.seo-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-xs);
}
.seo-card h3{font-size:1rem;margin-bottom:10px;color:var(--text)}
.seo-card p{font-size:0.875rem;color:var(--text-secondary);line-height:1.65}
.seo-card .highlight{color:var(--brand);font-weight:600}

/* Why section */
.why-section{padding:40px 0 48px}
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:20px}
.why-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-xs);
}
.why-icon{font-size:1.5rem;margin-bottom:10px}
.why-card h4{font-size:0.9375rem;margin-bottom:6px}
.why-card p{font-size:0.8125rem;color:var(--text-secondary);line-height:1.6}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{border-top:1px solid var(--border);padding:32px 20px;text-align:center}
.footer-inner{max-width:var(--max-w);margin:0 auto;font-size:0.8125rem;color:var(--text-muted)}
.footer-links{display:flex;justify-content:center;gap:24px;margin-top:10px;flex-wrap:wrap}
.footer-links a{color:var(--text-secondary);transition:color var(--transition-fast)}
.footer-links a:hover{color:var(--brand)}
.footer-brand{color:var(--brand);font-weight:700}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px){
  .signal-grid{grid-template-columns:repeat(2,1fr)}
  .controls-row{flex-direction:column;align-items:stretch}
  .controls-left{flex-wrap:wrap}
  .pair-search{flex:1;min-width:120px}
  .hero-title{font-size:2rem}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .seo-grid{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 700px){
  .signal-grid{grid-template-columns:1fr}
}
@media (max-width: 480px){
  .container{padding:0 12px}
  .header-inner{padding:0 12px}
  .header-tagline{display:none}
  .hero{padding:32px 0 28px}
  .hero-title{font-size:1.5rem}
  .hero-subtitle{font-size:0.9375rem}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .stat-card{padding:12px 14px}
  .stat-card-value{font-size:1.25rem}
  .tf-pill{padding:4px 8px;font-size:0.6875rem}
  .why-grid{grid-template-columns:1fr}
}

/* ============================================================
   PROMO BANNER — sticky top
   ============================================================ */
.promo-banner {
  position: sticky;
  top: 0;
  z-index: 200;
  background: linear-gradient(135deg, #1a1040 0%, #0d1f3c 50%, #0f2027 100%);
  border-bottom: 1px solid rgba(255,165,2,0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* Mobile-first: 2 rows */
.promo-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 8px 16px;
}

.promo-left {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 6px;
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: var(--amber);
  color: #0a0e17;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.promo-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
}

.promo-detail {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.promo-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 0;
  width: 100%;
  background: var(--amber);
  color: #0a0e17;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.8125rem;
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 0 16px rgba(255,165,2,0.3);
}

.promo-cta:hover {
  background: #ffb833;
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(255,165,2,0.5);
}

/* Desktop: single row */
@media (min-width: 601px) {
  .promo-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
  }
  .promo-left {
    margin-bottom: 0;
    gap: 10px;
  }
  .promo-cta {
    width: auto;
    padding: 8px 24px;
    font-size: 0.875rem;
  }
}