/* ============================================================
   CASE STUDY TEMPLATE — Figma Prototype Recreation
   Inspired by the Vocably case study prototype
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* Colors */
  --cs-bg-dark:           #1A1A1A;
  --cs-bg-white:          #FFFFFF;
  --cs-bg-light:          #F8F8FA;
  --cs-accent:            #7B7FE0;
  --cs-accent-light:      #D8D9F0;
  --cs-accent-superlight: #EEEEF8;
  --cs-text-primary:      #1A1A1A;
  --cs-text-body:         #4A4A4A;
  --cs-text-muted:        #888888;
  --cs-watermark:         rgba(0,0,0,0.04);
  --cs-btn-primary:       #7B7FE0;
  --cs-btn-outline:       transparent;
  --cs-pink-dot:          #FF6B9D;
  --cs-yellow-dot:        #F5C542;
  --cs-divider:           #E5E5E5;

  /* Typography */
  --cs-font:              'Inter', 'Roboto', -apple-system, sans-serif;

  /* Spacing */
  --cs-space-xs:   8px;
  --cs-space-sm:   16px;
  --cs-space-md:   32px;
  --cs-space-lg:   64px;
  --cs-space-xl:   96px;
  --cs-space-xxl:  120px;
  --cs-content-w:  1100px;
  --cs-page-pad:   80px;

  /* Misc */
  --cs-radius:     20px;
  --cs-shadow:     0 8px 40px rgba(0,0,0,0.08);
  --cs-transition: 0.4s cubic-bezier(0.4,0,0.2,1);
}

html, body {
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

.cs-page {
  font-family: var(--cs-font);
  color: var(--cs-text-body);
  background: var(--cs-bg-white);
  overflow-x: hidden;
  width: 100%;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.cs-page *,
.cs-page *::before,
.cs-page *::after {
  box-sizing: border-box;
}

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

/* ---------- Content Container ---------- */
.cs-container {
  max-width: var(--cs-content-w);
  margin: 0 auto;
  padding: 0 var(--cs-page-pad);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.cs-hero {
  position: relative;
  background: var(--cs-bg-dark);
  padding: var(--cs-space-xxl) 0 var(--cs-space-lg);
  overflow: hidden;
  min-height: 620px;
  display: flex;
  align-items: center;
}

/* Decorative lavender circle — top left */
.cs-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  left: -120px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(123,127,224,0.20) 0%, rgba(123,127,224,0.05) 60%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* Decorative small gray circle — top right area */
.cs-hero::after {
  content: '';
  position: absolute;
  top: 60px;
  right: 120px;
  width: 24px;
  height: 24px;
  background: rgba(255,255,255,0.12);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.cs-hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--cs-space-lg);
  max-width: var(--cs-content-w);
  margin: 0 auto;
  padding: 0 var(--cs-page-pad);
  width: 100%;
}

.cs-hero-text {
  flex: 1;
  min-width: 0;
}

.cs-hero-title {
  font-family: var(--cs-font);
  font-size: clamp(48px, 6vw, 64px);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.05;
  margin: 0 0 var(--cs-space-sm);
  letter-spacing: -1.5px;
  word-break: break-word;
}

.cs-hero-tagline {
  font-family: var(--cs-font);
  font-size: 20px;
  font-weight: 400;
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
  margin: 0;
  max-width: 380px;
}

.cs-hero-mockups {
  flex-shrink: 0;
  display: flex;
  align-items: flex-end;
  gap: -30px;
  position: relative;
}

.cs-hero-mockups .cs-phone {
  width: 210px;
}

.cs-hero-mockups .cs-phone:first-child {
  transform: translateY(20px);
  z-index: 1;
}

.cs-hero-mockups .cs-phone:last-child {
  margin-left: -40px;
  z-index: 2;
}

/* Pink dot decoration */
.cs-hero-mockups::after {
  content: '';
  position: absolute;
  bottom: 80px;
  right: -30px;
  width: 20px;
  height: 20px;
  background: var(--cs-pink-dot);
  border-radius: 50%;
  z-index: 3;
}

/* Hero metadata bar */
.cs-hero-meta {
  padding: var(--cs-space-md) var(--cs-page-pad);
  max-width: var(--cs-content-w);
  margin: 0 auto;
  display: flex;
  gap: var(--cs-space-lg);
  position: relative;
  z-index: 1;
}

.cs-meta-item {
  font-family: var(--cs-font);
  font-size: 14px;
  color: rgba(255,255,255,0.55);
}

.cs-meta-item strong {
  color: rgba(255,255,255,0.85);
  font-weight: 600;
}

/* ============================================================
   PHONE MOCKUP COMPONENT
   ============================================================ */
.cs-phone {
  background: #FFFFFF;
  border-radius: 36px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.08), inset 0 0 0 1px #E5E5E5;
  border: 10px solid #F5F5F5;
  box-sizing: content-box;
  position: relative;
}

.cs-phone img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 26px; /* 36px - 10px = 26px */
  position: relative;
  z-index: 1;
  border: 1px solid #E5E5E5;
}

/* Smaller phone for inline sections */
.cs-phone--sm {
  width: 200px;
  border-radius: 32px;
  border-width: 8px;
  border-color: #F8F8F8;
  box-shadow: 0 20px 40px rgba(0,0,0,0.06), inset 0 0 0 1px #E5E5E5;
}

.cs-phone--sm img {
  border-radius: 24px;
}

/* ============================================================
   OVERVIEW SECTION
   ============================================================ */
.cs-overview {
  padding: var(--cs-space-xl) 0;
}

.cs-overview-inner {
  max-width: var(--cs-content-w);
  margin: 0 auto;
  padding: 0 var(--cs-page-pad);
}

.cs-section-heading {
  font-family: var(--cs-font);
  font-size: 36px;
  font-weight: 700;
  color: var(--cs-text-primary);
  margin: 0 0 var(--cs-space-md);
  line-height: 1.2;
}

.cs-body-text {
  font-family: var(--cs-font);
  font-size: 16px;
  font-weight: 400;
  color: var(--cs-text-body);
  line-height: 1.8;
  margin: 0 0 var(--cs-space-sm);
  max-width: 520px;
}

.cs-body-text strong {
  color: var(--cs-text-primary);
  font-weight: 700;
}

/* Overview two-column layout */
.cs-overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--cs-space-lg);
  align-items: start;
}

/* Decorative speech bubbles area */
.cs-speech-area {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.cs-speech-circle {
  width: 280px;
  height: 280px;
  background: var(--cs-accent-light);
  border-radius: 50%;
  position: relative;
  opacity: 0.4;
}

.cs-speech-bubble {
  position: absolute;
  background: var(--cs-bg-white);
  border-radius: 16px;
  padding: 12px 20px;
  font-family: var(--cs-font);
  font-size: 18px;
  font-weight: 600;
  color: var(--cs-text-primary);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  white-space: nowrap;
}

.cs-speech-bubble--1 { top: 30px; right: 20px; }
.cs-speech-bubble--2 { top: 80px; right: -10px; font-size: 16px; color: var(--cs-accent); }
.cs-speech-bubble--3 { bottom: 60px; left: 40px; font-size: 22px; }

/* Yellow dot decoration */
.cs-speech-area::before {
  content: '';
  position: absolute;
  top: 20px;
  right: 80px;
  width: 12px;
  height: 12px;
  background: var(--cs-yellow-dot);
  border-radius: 50%;
}

/* Green dot */
.cs-speech-area::after {
  content: '';
  position: absolute;
  top: 50px;
  left: 60px;
  width: 8px;
  height: 8px;
  background: #6FCF97;
  border-radius: 50%;
}

/* Overview research section */
.cs-research-block {
  margin-top: var(--cs-space-xl);
  max-width: var(--cs-content-w);
  padding: 0 var(--cs-page-pad);
  margin-left: auto;
  margin-right: auto;
}

.cs-research-block .cs-overview-grid {
  grid-template-columns: 380px 1fr;
  gap: var(--cs-space-lg);
}

.cs-footnote {
  font-family: var(--cs-font);
  font-size: 12px;
  color: var(--cs-text-muted);
  line-height: 1.5;
  margin-top: var(--cs-space-md);
  font-style: italic;
}

/* ============================================================
   FEATURE SECTIONS (with Watermark Effect)
   ============================================================ */
.cs-feature-section {
  position: relative;
  padding: var(--cs-space-xl) 0;
  overflow: hidden;
}

.cs-feature-section--banded {
  background: linear-gradient(
    180deg,
    var(--cs-bg-white) 0%,
    var(--cs-accent-superlight) 30%,
    var(--cs-accent-superlight) 70%,
    var(--cs-bg-white) 100%
  );
}

.cs-feature-inner {
  max-width: var(--cs-content-w);
  margin: 0 auto;
  padding: 0 var(--cs-page-pad);
  position: relative;
  z-index: 1;
}

/* Watermark heading effect */
.cs-watermark-heading {
  position: relative;
  margin-bottom: var(--cs-space-lg);
}

.cs-watermark-text {
  font-family: var(--cs-font);
  font-size: 88px;
  font-weight: 700;
  color: var(--cs-watermark);
  text-transform: uppercase;
  line-height: 1;
  margin: 0;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  letter-spacing: 4px;
}

.cs-watermark-heading h2 {
  font-family: var(--cs-font);
  font-size: 32px;
  font-weight: 400;
  color: var(--cs-accent) !important;
  font-style: italic;
  margin: -24px 0 0 4px;
  position: relative;
  z-index: 1;
  line-height: 1.3;
}

/* Feature content layouts */
.cs-feature-content {
  display: flex;
  align-items: center;
  gap: var(--cs-space-lg);
}

.cs-feature-content--reverse {
  flex-direction: row-reverse;
}

.cs-feature-text {
  flex: 1;
  min-width: 0;
}

.cs-feature-mockups {
  display: flex;
  gap: var(--cs-space-sm);
  align-items: flex-start;
  flex-shrink: 0;
  flex-wrap: wrap;
  justify-content: center;
}

.cs-feature-mockups .cs-phone {
  width: 220px;
}

.cs-feature-mockups .cs-phone:nth-child(2) {
  margin-top: 40px;
}

/* Decorative circles for feature sections */
.cs-feature-section .cs-deco-circle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.cs-deco-circle--lavender-lg {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(123,127,224,0.12) 0%, rgba(123,127,224,0.03) 60%, transparent 70%);
  top: -100px;
  right: -150px;
}

.cs-deco-circle--lavender-sm {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(123,127,224,0.15) 0%, transparent 70%);
  bottom: 40px;
  left: -60px;
}

/* ============================================================
   SCREENS ROW SECTION (Sign Up, Onboarding, etc.)
   ============================================================ */
.cs-screens-section {
  padding: var(--cs-space-xl) 0 var(--cs-space-lg);
  position: relative;
  overflow: hidden;
}

.cs-screens-section--banded {
  background: linear-gradient(
    180deg,
    var(--cs-bg-white) 0%,
    var(--cs-accent-superlight) 15%,
    var(--cs-accent-superlight) 50%,
    var(--cs-bg-white) 100%
  );
}

.cs-screens-inner {
  max-width: var(--cs-content-w);
  margin: 0 auto;
  padding: 0 var(--cs-page-pad);
}

.cs-screens-title {
  font-family: var(--cs-font);
  font-size: 32px;
  font-weight: 400;
  font-style: italic;
  color: var(--cs-accent) !important;
  text-align: center;
  margin: 0 0 var(--cs-space-lg);
}

.cs-screens-row {
  display: flex;
  justify-content: center;
  gap: var(--cs-space-md);
  flex-wrap: wrap;
  align-items: flex-start;
}

.cs-screens-row .cs-phone {
  width: 200px;
  transition: transform var(--cs-transition);
}

.cs-screens-row .cs-phone:hover {
  transform: translateY(-8px) scale(1.02);
}

/* ============================================================
   LEARNINGS / TEXT SECTION
   ============================================================ */
.cs-text-section {
  padding: var(--cs-space-lg) 0;
  overflow: hidden;
}

.cs-text-section-inner {
  max-width: var(--cs-content-w);
  margin: 0 auto;
  padding: 0 var(--cs-page-pad);
}

.cs-text-section .cs-divider {
  border: none;
  height: 1px;
  background: var(--cs-divider);
  margin: 0 0 var(--cs-space-lg);
}

.cs-text-heading {
  font-family: var(--cs-font);
  font-size: 32px;
  font-weight: 400;
  font-style: italic;
  color: var(--cs-accent) !important;
  margin: 0 0 var(--cs-space-md);
}

.cs-text-content {
  max-width: 600px;
}

.cs-text-content p {
  font-family: var(--cs-font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--cs-text-body);
  margin: 0 0 var(--cs-space-sm);
}

/* Text + mockup side-by-side */
.cs-text-with-mockup {
  display: flex;
  gap: var(--cs-space-xl);
  align-items: flex-start;
}

.cs-text-with-mockup .cs-text-content {
  flex: 1;
}

.cs-text-with-mockup .cs-phone {
  width: 240px;
  flex-shrink: 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.cs-footer {
  padding: var(--cs-space-md) 0;
  text-align: center;
}

.cs-footer p {
  font-family: var(--cs-font);
  font-size: 12px;
  color: var(--cs-text-muted);
  margin: 0;
}

/* ============================================================
   PAGE INDICATOR (bottom center dot like Figma prototype)
   ============================================================ */
.cs-page-indicator {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cs-bg-dark);
  color: #FFFFFF;
  font-family: var(--cs-font);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 20px;
  opacity: 0.7;
  z-index: 100;
  pointer-events: none;
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
.cs-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.cs-reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.cs-reveal-children > * {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.cs-reveal-children.cs-reveal--visible > *:nth-child(1) { transition-delay: 0.05s; }
.cs-reveal-children.cs-reveal--visible > *:nth-child(2) { transition-delay: 0.12s; }
.cs-reveal-children.cs-reveal--visible > *:nth-child(3) { transition-delay: 0.19s; }
.cs-reveal-children.cs-reveal--visible > *:nth-child(4) { transition-delay: 0.26s; }

.cs-reveal-children.cs-reveal--visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet and Small Desktop */
@media (max-width: 1150px) {
  :root {
    --cs-page-pad: 40px;
  }

  .cs-hero {
    min-height: auto;
    padding: var(--cs-space-xl) 0 var(--cs-space-md);
  }

  .cs-hero-inner {
    flex-direction: column;
    text-align: center;
    gap: var(--cs-space-md);
  }

  .cs-hero-title {
    font-size: 52px;
  }

  .cs-hero-tagline {
    max-width: 100%;
  }

  .cs-hero-mockups .cs-phone {
    width: 200px;
  }

  .cs-hero-meta {
    justify-content: center;
  }

  .cs-overview-grid {
    grid-template-columns: 1fr;
    gap: 32px !important;
  }

  .cs-research-block .cs-overview-grid {
    grid-template-columns: 1fr;
  }

  .cs-feature-content,
  .cs-feature-content--reverse {
    flex-direction: column;
    text-align: center;
    align-items: center;
    gap: 40px !important;
  }

  .cs-feature-mockups .cs-phone {
    width: 180px;
  }

  .cs-watermark-text {
    font-size: 56px;
  }

  .cs-text-with-mockup {
    flex-direction: column;
    align-items: center;
  }

  /* Specific section fixes */
  #final-design .cs-reveal > div:nth-child(2) {
    padding: 40px 24px !important;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --cs-page-pad: 24px;
  }

  .cs-hero {
    padding: var(--cs-space-lg) 0 var(--cs-space-md);
  }

  .cs-hero-title {
    font-size: 36px;
    letter-spacing: -1px;
  }

  .cs-hero-tagline {
    font-size: 16px;
  }

  .cs-hero-mockups {
    flex-direction: row;
    justify-content: center;
    gap: 12px;
  }

  .cs-hero-mockups .cs-phone {
    width: 140px;
  }

  .cs-hero-mockups .cs-phone:last-child {
    margin-left: -15px;
  }

  .cs-section-heading {
    font-size: 28px;
  }

  .cs-watermark-text {
    font-size: 32px;
    letter-spacing: 2px;
  }

  .cs-watermark-heading h2 {
    font-size: 22px;
    margin-top: -12px;
  }

  .cs-screens-row .cs-phone {
    width: 130px;
  }

  .cs-screens-title {
    font-size: 22px;
  }

  .cs-feature-mockups .cs-phone {
    width: 140px;
  }

  .cs-speech-circle {
    width: 180px;
    height: 180px;
  }

  .cs-text-heading {
    font-size: 22px;
  }

  .cs-text-with-mockup .cs-phone {
    width: 180px;
  }

  /* Grid adjustments */
  [style*="display: grid"] {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
  }

  #usability-testing [style*="grid-column: span 1"] {
    grid-column: auto !important;
  }

  /* Showcase Card refinements */
  #final-design .cs-reveal > div:nth-child(2) {
    border-radius: 20px !important;
    padding: 32px 16px !important;
  }

  #final-design .cs-reveal > div:nth-child(2) > div:first-child {
    padding: 0 0 32px !important;
  }

  #final-design .cs-reveal > div:nth-child(2) > div:first-child p:first-child {
    font-size: 18px !important;
  }

  /* Sketch/Image grouping */
  [style*="max-width: 48%"] {
    max-width: 100% !important;
  }

  /* Reflection Callout */
  #reflection [style*="padding: 40px"] {
    padding: 24px 16px !important;
  }

  #reflection [style*="font-size: 16px"] {
    font-size: 14px !important;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .cs-hero-title {
    font-size: 30px;
  }

  .cs-hero-mockups .cs-phone {
    width: 120px;
  }

  .cs-screens-row {
    gap: 8px;
  }

  .cs-screens-row .cs-phone {
    width: 100px;
  }

  .cs-watermark-text {
    font-size: 24px;
  }
}