/* ============================================================
   QUANTEX — Main Stylesheet
   Corporate AI Agency | quantex.rs
   ============================================================ */

/* ── Design Tokens ────────────────────────────────────────── */
:root {
  /* Colors */
  --bg-base:        #060912;
  --bg-elevated:    #0d1322;
  --bg-card:        #0f1928;
  --bg-card-hover:  #131e33;
  --border:         rgba(255, 255, 255, 0.07);
  --border-hover:   rgba(99, 179, 237, 0.3);

  --accent:         #3b82f6;
  --accent-dark:    #2563eb;
  --accent-light:   #60a5fa;
  --cyan:           #06b6d4;
  --cyan-dark:      #0891b2;
  --success:        #10b981;

  --gradient:       linear-gradient(135deg, #3b82f6, #06b6d4);
  --gradient-glow:  linear-gradient(135deg, rgba(59,130,246,0.15), rgba(6,182,212,0.15));

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #4b5563;

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

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;
  --text-7xl:  4.5rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Borders */
  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-2xl: 32px;

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.4);
  --shadow:       0 4px 20px rgba(0,0,0,0.5);
  --shadow-lg:    0 20px 60px rgba(0,0,0,0.6);
  --shadow-glow:  0 0 40px rgba(59,130,246,0.15);
  --shadow-cyan:  0 0 40px rgba(6,182,212,0.12);

  /* Transitions */
  --transition:       200ms ease;
  --transition-slow:  400ms ease;
  --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --container-max: 1200px;
  --section-pad:   clamp(4rem, 8vw, 8rem);
  --section-pad-sm: clamp(2.5rem, 5vw, 4rem);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video, svg {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

::selection {
  background: rgba(59,130,246,0.3);
  color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ── Utilities ────────────────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
}

.section-padding {
  padding-block: var(--section-pad);
}

.section-padding-sm {
  padding-block: var(--section-pad-sm);
}

.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.06);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(59,130,246,0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(59,130,246,0.55);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}

.btn-secondary:hover {
  border-color: var(--accent-light);
  background: rgba(59,130,246,0.08);
  transform: translateY(-1px);
}

/* ── Section Headers ──────────────────────────────────────── */
.section-header {
  text-align: center;
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 1rem;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: var(--space-5);
}

.section-title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 640px;
  margin-inline: auto;
}

/* ── Navigation ───────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background var(--transition-slow), border-color var(--transition-slow), box-shadow var(--transition-slow);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(6,9,18,0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.nav-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  border-radius: var(--radius-sm);
  font-size: var(--text-lg);
  font-weight: 900;
  color: white;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
  box-shadow: 0 0 20px rgba(59,130,246,0.4);
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-logo-img {
  height: 68px;
  width: auto;
  display: block;
  transition: opacity var(--transition);
}

.nav-logo:hover .nav-logo-img {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.nav-cta-btn {
  padding: 0.55rem 1.25rem;
  background: var(--gradient);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius);
  margin-left: var(--space-4);
  box-shadow: 0 2px 16px rgba(59,130,246,0.3);
  transition: all var(--transition);
}

.nav-cta-btn:hover {
  box-shadow: 0 4px 24px rgba(59,130,246,0.5);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.nav-toggle:hover {
  background: rgba(255,255,255,0.08);
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
  transform-origin: center;
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero-section {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 72px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 100%);
  pointer-events: none;
}

.hero-bg-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(59,130,246,0.12) 0%, rgba(6,182,212,0.06) 50%, transparent 80%);
  pointer-events: none;
  animation: glow-pulse 8s ease-in-out infinite;
}

.hero-container {
  text-align: center;
  position: relative;
  z-index: 1;
  padding-block: var(--space-16);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 1rem;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--accent-light);
  letter-spacing: 0.03em;
  margin-bottom: var(--space-8);
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: dot-pulse 2s ease-in-out infinite;
}

.hero-headline {
  font-size: clamp(2.5rem, 6vw, var(--text-7xl));
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
  max-width: 900px;
  margin-inline: auto;
}

.hero-subtext {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: var(--text-secondary);
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-10);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-16);
}

.hero-stats {
  display: inline-flex;
  align-items: stretch;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-10);
  gap: var(--space-10);
  backdrop-filter: blur(12px);
  flex-wrap: wrap;
  justify-content: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.stat-number {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-unit {
  font-size: var(--text-2xl);
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-light);
  line-height: 1;
  margin-left: -4px;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-align: center;
  max-width: 140px;
  line-height: 1.4;
}

.stat-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
}

.hero-scroll-indicator span {
  display: block;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  margin: 0 auto;
  animation: scroll-line 2.5s ease-in-out infinite;
}

/* ── Capabilities ─────────────────────────────────────────── */
.capabilities-section {
  padding-block: var(--space-20);
  position: relative;
}

.capabilities-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 50%, rgba(59,130,246,0.05), transparent);
  pointer-events: none;
}

.capabilities-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.capabilities-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 0 0 var(--space-3) 0;
}

.capabilities-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.cap-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
  cursor: default;
}

.cap-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.cap-item:hover::after {
  transform: scaleX(1);
}

.cap-item:hover {
  border-color: rgba(59,130,246,0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.35);
}

.cap-number {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.cap-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: all var(--transition);
  flex-shrink: 0;
}

.cap-item:hover .cap-icon {
  background: rgba(59,130,246,0.2);
  border-color: rgba(59,130,246,0.4);
  color: #93c5fd;
  box-shadow: 0 0 20px rgba(59,130,246,0.2);
}

.cap-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.cap-text strong {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.cap-text span {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ── Services ─────────────────────────────────────────────── */
.services-section {
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.service-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transition: all var(--transition-slow);
  overflow: hidden;
}

.service-card:hover {
  border-color: rgba(59,130,246,0.25);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), 0 0 50px rgba(59,130,246,0.06);
}

.service-gradient-border {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--gradient);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

.service-card:hover .service-gradient-border {
  opacity: 0.35;
}

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius-lg);
  color: var(--accent-light);
  flex-shrink: 0;
  transition: all var(--transition);
}

.service-card:hover .service-icon {
  background: rgba(59,130,246,0.18);
  border-color: rgba(59,130,246,0.35);
  box-shadow: 0 0 20px rgba(59,130,246,0.2);
}

.service-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.service-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.service-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.8;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-features li {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.6;
}

.service-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  background: var(--gradient);
  border-radius: 50%;
}

.services-cta {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

.services-cta p {
  color: var(--text-secondary);
  font-size: var(--text-base);
}

/* ── Process ──────────────────────────────────────────────── */
.process-section {
  position: relative;
}

.process-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.process-timeline {
  position: relative;
  max-width: 800px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.process-step {
  display: grid;
  grid-template-columns: 48px auto 1fr;
  gap: 0 var(--space-6);
  align-items: start;
  position: relative;
  padding-bottom: var(--space-12);
}

.process-step:last-child {
  padding-bottom: 0;
}

.step-connector {
  position: absolute;
  left: 23px;
  top: 52px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, rgba(59,130,246,0.4), rgba(6,182,212,0.1));
}

.process-step:last-child .step-connector {
  display: none;
}

.step-number {
  grid-column: 2;
  grid-row: 1;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--accent-light);
  flex-shrink: 0;
  z-index: 1;
}

.step-content {
  grid-column: 3;
  grid-row: 1;
  padding-top: var(--space-2);
}

.step-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.step-description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-3);
}

.step-duration {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--accent-light);
  background: rgba(59,130,246,0.08);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  border: 1px solid rgba(59,130,246,0.15);
}

/* ── Security Section ─────────────────────────────────────── */
.security-section {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.security-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-10);
  background: rgba(16,185,129,0.04);
  border: 1px solid rgba(16,185,129,0.12);
  border-radius: var(--radius-xl);
}

.security-icon {
  color: var(--success);
  width: 72px;
  height: 72px;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.security-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.security-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.8;
}

.security-pillars {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex-shrink: 0;
}

.security-pillar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(16,185,129,0.06);
  border: 1px solid rgba(16,185,129,0.12);
  border-radius: var(--radius);
}

.pillar-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(52,211,153,0.9);
  white-space: nowrap;
}

/* ── Calculator ───────────────────────────────────────────── */
.calculator-section {
  position: relative;
}

.calculator-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
}

.calculator-form {
  padding: var(--space-10);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.calc-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.calc-range-value {
  color: var(--accent-light);
  font-family: var(--font-mono);
  font-size: var(--text-base);
}

.calc-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition);
}

.calc-input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(59,130,246,0.05);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.calc-input::placeholder {
  color: var(--text-muted);
}

/* Range Input */
.calc-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  outline: none;
  cursor: pointer;
}

.calc-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--gradient);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 12px rgba(59,130,246,0.4);
  transition: box-shadow var(--transition);
}

.calc-range::-webkit-slider-thumb:hover {
  box-shadow: 0 0 20px rgba(59,130,246,0.6);
}

.calc-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--gradient);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 12px rgba(59,130,246,0.4);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.calc-tooltip {
  position: relative;
  display: inline-flex;
  color: var(--text-muted);
  cursor: help;
}

.tooltip-text {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--text-secondary);
  width: 240px;
  white-space: normal;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 100;
  box-shadow: var(--shadow-lg);
  line-height: 1.6;
}

.calc-tooltip:hover .tooltip-text {
  opacity: 1;
}

.calc-submit-btn {
  width: 100%;
  justify-content: center;
  padding: 0.875rem;
  font-size: var(--text-base);
  margin-top: var(--space-2);
}

/* Calculator Results */
.calculator-results {
  padding: var(--space-10);
  display: flex;
  align-items: center;
}

.results-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
  color: var(--text-muted);
  width: 100%;
  padding: var(--space-8);
}

.placeholder-icon {
  color: var(--text-muted);
  opacity: 0.4;
}

.results-placeholder p {
  font-size: var(--text-sm);
  line-height: 1.7;
}

.results-content {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.results-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.result-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.result-card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.result-card-primary {
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.2);
}

.result-card-secondary {
  background: rgba(6,182,212,0.06);
  border: 1px solid rgba(6,182,212,0.15);
}

.result-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.4;
}

.result-value {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.result-number {
  font-size: var(--text-3xl);
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1;
}

.result-unit {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
}

.result-sub {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.4;
}

.results-disclaimer {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.6;
  padding: var(--space-3) var(--space-4);
  border-left: 2px solid rgba(255,255,255,0.06);
  font-style: italic;
}

.results-cta {
  background: var(--gradient-glow);
  border: 1px solid rgba(59,130,246,0.15);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.results-cta-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── FAQ ──────────────────────────────────────────────────── */
.faq-section {
  position: relative;
}

.faq-grid {
  max-width: 900px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item:hover {
  border-color: rgba(59,130,246,0.2);
}

.faq-question {
  width: 100%;
  padding: var(--space-6) var(--space-8);
  text-align: left;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(255,255,255,0.03);
}

.faq-question[aria-expanded="true"] {
  color: var(--accent-light);
}

.faq-icon {
  flex-shrink: 0;
  transition: transform var(--transition-slow);
  color: var(--text-muted);
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-light);
}

.faq-answer {
  padding: 0 var(--space-8) var(--space-6);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-answer p {
  margin-bottom: var(--space-3);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-block: var(--space-3);
}

.faq-answer ul li {
  padding-left: var(--space-5);
  position: relative;
}

.faq-answer ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  background: var(--gradient);
  border-radius: 50%;
}

/* ── Contact ──────────────────────────────────────────────── */
.contact-section {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: center;
}

.contact-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact-title {
  font-size: clamp(var(--text-3xl), 3.5vw, var(--text-5xl));
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.contact-description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.8;
}

.contact-benefits {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-benefits li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.contact-benefits li svg {
  color: var(--success);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Contact Form */
.contact-form-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.form-input {
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: var(--text-sm);
  transition: all var(--transition);
  width: 100%;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(59,130,246,0.05);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input.has-error {
  border-color: rgba(239,68,68,0.5);
  background: rgba(239,68,68,0.04);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-error {
  font-size: var(--text-xs);
  color: rgba(252,165,165,0.9);
  min-height: 1.2em;
}

.form-submit-btn {
  width: 100%;
  justify-content: center;
  padding: 0.875rem;
  font-size: var(--text-base);
}

.form-success {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  color: rgba(110,231,183,0.9);
}

.form-success svg {
  flex-shrink: 0;
}

.form-privacy {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding-block: var(--space-16) var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-logo {
  margin-bottom: var(--space-4);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
  margin-bottom: var(--space-4);
}

.footer-contact-link {
  font-size: var(--text-sm);
  color: var(--accent-light);
  transition: color var(--transition);
  font-style: normal;
}

.footer-contact-link:hover {
  color: var(--text-primary);
}

.footer-nav-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.footer-copyright,
.footer-location {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ── Testimonials ─────────────────────────────────────────── */
.testimonials-section {
  position: relative;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* Slider (injected by JS) */
.testimonials-slider {
  overflow: hidden;
  position: relative;
}

.testimonials-track {
  display: flex;
  transition: transform 0.65s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.slide-group {
  flex: 0 0 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.slider-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.slider-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.slider-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 4px 16px rgba(59,130,246,0.35);
}

.slider-dots {
  display: flex;
  gap: 8px;
  align-items: center;
}

.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  border: none;
  cursor: pointer;
  transition: all 0.35s ease;
  padding: 0;
}

.slider-dot.active {
  background: var(--accent);
  width: 28px;
  border-radius: 4px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  font-size: 5rem;
  line-height: 1;
  color: rgba(59,130,246,0.08);
  font-family: Georgia, serif;
  pointer-events: none;
  user-select: none;
}

.testimonial-card:hover {
  border-color: rgba(59,130,246,0.2);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.testimonial-stars {
  display: flex;
  gap: 3px;
}

.testimonial-stars svg {
  flex-shrink: 0;
}

.testimonial-quote {
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 0;
  flex: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 700;
  color: white;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.testimonial-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.testimonial-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.testimonial-role {
  font-size: var(--text-xs);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.testimonial-service-tag {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Back to Top ──────────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  z-index: 900;
  transition: all var(--transition);
  box-shadow: var(--shadow);
}

.back-to-top:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(59,130,246,0.4);
}

.back-to-top[hidden] {
  display: none;
}