/* ==========================================================================
   PLURON STUDIO - AI LEAD RESPONSE SYSTEM STYLESHEET
   Page: Stop losing customers because nobody followed up
   Brand Theme:
     Main Background:   #e2e8f0 (Light Slate/Gray)
     Structural Text:   #1a0a1f (Dark Purple/Plum)
     Primary Accent:    #00f5ff (Electric Cyan)
     Accent Hover:      #00e0ea
     Dark Sections:     #1a0a1f (Brand Deep Purple)
     Dark Card:         #25112c
     Light Card:        #ffffff (Pure White Elevation)
     Muted Light:       #4a3b52
     Muted Dark:        #cbd5e1
     Line/Borders:      rgba(26, 10, 31, 0.12)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS VARIABLES & DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  --bg: #e2e8f0;
  --ink: #1a0a1f;
  --mute: #4a3b52;
  --card: #ffffff;
  --card-border: rgba(26, 10, 31, 0.12);
  --line: rgba(26, 10, 31, 0.12);
  --acc: #00f5ff;
  --acc-hover: #00e0ea;
  --accink: #1a0a1f;
  --acc-glow: rgba(0, 245, 255, 0.35);
  --dark: #1a0a1f;
  --darkink: #ffffff;
  --darkmute: #cbd5e1;
  --darkcard: #25112c;
  --darkline: rgba(0, 245, 255, 0.2);
  --good: #0891b2;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --shadow-sm: 0 2px 8px rgba(26, 10, 31, 0.04);
  --shadow-md: 0 8px 24px rgba(26, 10, 31, 0.07);
  --shadow-lg: 0 16px 40px rgba(26, 10, 31, 0.1);
  --shadow-acc: 0 6px 20px rgba(0, 245, 255, 0.35);
  
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* Dark mode overrides aligned with Pluron palette */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #120617;
    --ink: #ffffff;
    --mute: #cbd5e1;
    --card: #1f0c26;
    --card-border: rgba(0, 245, 255, 0.18);
    --line: rgba(0, 245, 255, 0.18);
    --acc: #00f5ff;
    --acc-hover: #00e0ea;
    --accink: #1a0a1f;
    --dark: #0b020e;
    --darkink: #ffffff;
    --darkmute: #cbd5e1;
    --darkcard: #190820;
    --darkline: rgba(0, 245, 255, 0.25);
    --good: #00f5ff;
  }
}

:root[data-theme="dark"] {
  --bg: #120617;
  --ink: #ffffff;
  --mute: #cbd5e1;
  --card: #1f0c26;
  --card-border: rgba(0, 245, 255, 0.18);
  --line: rgba(0, 245, 255, 0.18);
  --acc: #00f5ff;
  --acc-hover: #00e0ea;
  --accink: #1a0a1f;
  --dark: #0b020e;
  --darkink: #ffffff;
  --darkmute: #cbd5e1;
  --darkcard: #190820;
  --darkline: rgba(0, 245, 255, 0.25);
  --good: #00f5ff;
}

/* --------------------------------------------------------------------------
   2. BASE RESET & TYPOGRAPHY
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: env(safe-area-inset-top, 0px);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 1.125rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 800;
}

h1 {
  font-size: clamp(2.4rem, 6.5vw, 4rem);
  font-weight: 800;
  margin-bottom: 0.6em;
}

h2 {
  font-size: clamp(1.85rem, 4.5vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 0.7em;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.35em;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1.2em;
}

a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --------------------------------------------------------------------------
   3. LAYOUT & UTILITY CLASSES
   -------------------------------------------------------------------------- */
.w {
  width: 100%;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

section {
  padding: 80px 0;
}

.lead {
  color: var(--mute);
  max-width: 58ch;
  font-size: 1.2rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   4. BUTTONS & INTERACTIVE ELEMENTS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--acc);
  color: var(--accink);
  font-weight: 800;
  font-size: 1.05rem;
  text-decoration: none;
  padding: 16px 32px;
  border-radius: 10px;
  border: 2px solid var(--acc);
  cursor: pointer;
  box-shadow: var(--shadow-acc);
  transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-align: center;
}

.btn:hover {
  background-color: var(--acc-hover);
  border-color: var(--acc-hover);
  color: var(--accink);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(0, 245, 255, 0.45);
}

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

.btn:focus-visible, a:focus-visible {
  outline: 3px solid var(--acc);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   5. PLURON BRAND HEADER & LOGO
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--dark);
  border-bottom: 1px solid var(--darkline);
  padding: 0.9rem 0;
  box-shadow: 0 4px 20px rgba(26, 10, 31, 0.3);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo-img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  transition: transform 0.25s ease;
}

.brand-logo:hover .brand-logo-img {
  transform: rotate(5deg) scale(1.05);
}

.brand-name {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #ffffff;
}

.brand-sub {
  font-weight: 400;
  font-size: 1.1rem;
  color: var(--acc);
}

/* Fallback if logo is rendered in plain .w top bar */
.w > .brand-logo,
.brand-bar {
  display: flex;
  align-items: center;
}

/* --------------------------------------------------------------------------
   6. HERO SECTION
   -------------------------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 52px;
  align-items: center;
  padding-top: 56px;
  padding-bottom: 32px;
}

.hero h1 {
  margin-bottom: 0.55em;
}

.hero .lead {
  margin-bottom: 2rem;
}

/* Chat simulation widget */
.chat {
  background-color: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 1rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.chat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--acc), rgba(0, 245, 255, 0.2));
}

.m {
  max-width: 86%;
  padding: 12px 18px;
  border-radius: 16px;
  line-height: 1.5;
}

.m small {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 4px;
  opacity: 0.75;
}

.in {
  background-color: #f1f5f9;
  color: #1a0a1f;
  border: 1px solid rgba(26, 10, 31, 0.08);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.out {
  background: linear-gradient(135deg, #1a0a1f 0%, #25112c 100%);
  color: #ffffff;
  border: 1px solid rgba(0, 245, 255, 0.25);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  box-shadow: 0 4px 14px rgba(26, 10, 31, 0.15);
}

.out small {
  color: var(--acc);
  opacity: 1;
}

.note {
  align-self: center;
  color: var(--accink);
  background-color: rgba(0, 245, 255, 0.15);
  border: 1px solid rgba(0, 245, 255, 0.45);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.note::before {
  content: "";
  width: 8px;
  height: 8px;
  background-color: var(--acc);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--acc);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

/* --------------------------------------------------------------------------
   7. DEMO VIDEO SECTION
   -------------------------------------------------------------------------- */
#demo {
  padding-top: 40px;
}

#demo h2 {
  text-align: center;
  margin-bottom: 1.75rem;
}

.vid {
  max-width: 360px;
  width: 100%;
  margin: 0 auto;
  background: linear-gradient(135deg, #1a0a1f 0%, #25112c 100%);
  color: #ffffff;
  border: 2px solid var(--darkline);
  border-radius: 28px;
  padding: 10px;
  overflow: hidden;
  box-shadow: 0 20px 48px rgba(26, 10, 31, 0.22), 0 0 0 1px rgba(0, 245, 255, 0.25);
  position: relative;
}

.vid > div {
  border-radius: 20px;
  overflow: hidden;
  width: 100%;
}

.vid strong {
  font-size: 1.25rem;
  color: #ffffff;
}

.vid span {
  color: var(--darkmute);
}

.vid iframe, .vid video {
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 20px;
}

/* --------------------------------------------------------------------------
   8. PROBLEM SECTION (PLURON BRAND PURPLE THEME)
   -------------------------------------------------------------------------- */
.prob {
  background-color: var(--dark);
  color: var(--darkink);
  border-top: 1px solid var(--darkline);
  border-bottom: 1px solid var(--darkline);
  position: relative;
}

.prob h2 {
  color: #ffffff;
}

.prob .lead {
  color: var(--darkmute);
  font-size: 1.2rem;
}

.seq {
  list-style: none;
  padding: 0;
  margin: 32px 0;
  display: grid;
  gap: 14px;
  max-width: 560px;
}

.seq li {
  padding: 10px 0 10px 20px;
  border-left: 3px solid var(--acc);
  font-size: 1.2rem;
  color: #e2e8f0;
  line-height: 1.5;
  transition: transform 0.2s ease, color 0.2s ease;
}

.seq li:hover {
  transform: translateX(4px);
  color: #ffffff;
}

.seq li:last-child {
  font-weight: 700;
  color: var(--acc);
}

/* --------------------------------------------------------------------------
   9. HOW IT WORKS (STEPS)
   -------------------------------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: s;
  margin-top: 16px;
}

.step {
  background-color: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
}

.step:hover {
  transform: translateY(-4px);
  border-color: var(--acc);
  box-shadow: 0 12px 28px rgba(0, 245, 255, 0.16);
}

.step::before {
  counter-increment: s;
  content: counter(s);
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: var(--acc);
  color: var(--accink);
  font-weight: 800;
  font-size: 1.05rem;
  margin-bottom: 18px;
  box-shadow: 0 3px 10px rgba(0, 245, 255, 0.35);
}

.step h3 {
  color: var(--ink);
  margin-bottom: 0.4em;
}

.step p {
  color: var(--mute);
  margin: 0;
  font-size: 1rem;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   10. TARGET AUDIENCE (WHO)
   -------------------------------------------------------------------------- */
.who {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
}

.who li {
  background-color: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 16px 20px;
  font-weight: 600;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.who li:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 245, 255, 0.6);
}

.who li::before {
  content: "✓";
  color: #0891b2;
  font-weight: 800;
  font-size: 1.15rem;
  margin-right: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: rgba(0, 245, 255, 0.15);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   11. FOUNDING CLIENT OFFER
   -------------------------------------------------------------------------- */
.offer {
  background-color: var(--card);
  border: 2px solid var(--ink);
  border-radius: 24px;
  padding: 44px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  box-shadow: 0 0 0 2px rgba(0, 245, 255, 0.3), var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.offer::before {
  content: "SPECIAL INVITATION";
  position: absolute;
  top: 18px;
  right: -32px;
  transform: rotate(45deg);
  background-color: var(--acc);
  color: var(--accink);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 4px 38px;
  box-shadow: 0 2px 8px rgba(0, 245, 255, 0.3);
}

.price {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-weight: 800;
  font-size: clamp(2.2rem, 5.5vw, 3.4rem);
  line-height: 1.1;
  color: var(--ink);
  margin-top: 6px;
}

.was {
  color: #64748b;
  text-decoration: line-through;
  font-size: 1.25rem;
  font-weight: 600;
}

.offer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.offer li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
  color: var(--ink);
  display: flex;
  align-items: center;
}

.offer li:last-child {
  border-bottom: none;
}

.offer li::before {
  content: "✓";
  color: #0891b2;
  font-weight: 800;
  font-size: 1.1rem;
  margin-right: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: rgba(0, 245, 255, 0.15);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   12. CALL TO ACTION (CTA)
   -------------------------------------------------------------------------- */
.cta {
  text-align: center;
  padding-bottom: 96px;
}

.cta .lead {
  margin: 0 auto 32px;
  max-width: 62ch;
}

.cta .btn {
  font-size: 1.15rem;
  padding: 18px 36px;
}

.cta p a {
  color: var(--ink);
  font-weight: 700;
  border-bottom: 2px solid var(--acc);
  padding-bottom: 1px;
}

.cta p a:hover {
  color: var(--acc);
}

/* --------------------------------------------------------------------------
   13. FOOTER
   -------------------------------------------------------------------------- */
footer {
  background-color: var(--dark);
  color: var(--darkmute);
  padding: 36px 0 44px;
  font-size: 0.95rem;
  text-align: center;
  border-top: 1px solid var(--darkline);
}

/* --------------------------------------------------------------------------
   14. RESPONSIVE DESIGN
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .who {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .offer {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 32px;
  }
  
  section {
    padding: 56px 0;
  }
}

@media (max-width: 560px) {
  .steps {
    grid-template-columns: 1fr;
  }
  
  .who {
    grid-template-columns: 1fr;
  }
  
  .offer {
    padding: 24px;
  }
  
  .offer::before {
    display: none;
  }
  
  .btn {
    width: 100%;
    padding: 16px 20px;
  }
}