/* ============================================================
   Section: Forgetting Curve (forgetting-curve.css)
   Figma Node: 0:4718
   Stack: Vanilla CSS + BEM + Design Tokens
   ============================================================ */

.forgetting-curve {
  position: relative;
  width: 100%;
  background-color: var(--color-curve-bg, #F8F9FC);
  padding: 120px 0 100px;
  overflow: hidden;
}

.forgetting-curve_container {
  width: 100%;
  max-width: var(--hero-card-max-width, 1416px);
  margin: 0 auto;
  padding: 0 80px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 60px;
  box-sizing: border-box;
}

/* ============================================================
   Left Column: Text Content (Figma Node 0:4726)
   ============================================================ */

.forgetting-curve_content {
  flex: 1 1 540px;
  max-width: 620px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  word-break: break-word;
}

/* Eyebrow / Category Tag (Figma Node 0:4729) */
.forgetting-curve_eyebrow {
  display: inline-block;
  font-family: var(--font-heading, 'Google Sans', sans-serif);
  font-size: var(--font-size-eyebrow, 14px);
  font-weight: var(--font-weight-bold, 700);
  line-height: 1;
  letter-spacing: 0.56px;
  text-transform: uppercase;
  color: var(--color-eyebrow, #5B28AD);
  margin-bottom: 24px;
}

/* Heading (Figma Node 0:4730) */
.forgetting-curve_title {
  font-family: var(--font-heading, 'Google Sans', sans-serif);
  font-size: clamp(34px, 3.8vw, 54px);
  font-weight: var(--font-weight-bold, 700);
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--color-text-primary, #020101);
  margin: 0 0 32px 0;
  text-wrap: balance;
}

/* Narrative Paragraphs (Figma Node 0:4731) */
.forgetting-curve_body {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 585px;
}

.forgetting-curve_text {
  font-family: var(--font-body, 'Google Sans', sans-serif);
  font-size: var(--font-size-body, 18px);
  font-weight: var(--font-weight-regular, 400);
  line-height: 1.6;
  color: rgba(2, 1, 1, 0.72);
  margin: 0;
  text-wrap: pretty;
}

/* ============================================================
   Right Column: Forgetting Curve Chart (Figma Node 0:4732)
   ============================================================ */

.forgetting-curve_visual {
  flex: 1 1 500px;
  width: 100%;
  min-width: 0;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.forgetting-curve_chart-wrapper {
  position: relative;
  width: 100%;
  min-width: 0;
  max-width: 540px;
}

/* SVG Chart */
.forgetting-curve_chart-svg {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
}

/* Y-Axis Rotated Title */
.forgetting-curve_axis-title {
  font-family: var(--font-body, 'Google Sans', sans-serif);
  font-size: 13px;
  font-weight: 500;
  fill: rgba(2, 1, 1, 0.45);
  letter-spacing: 0.2px;
}

/* Tick Labels */
.forgetting-curve_tick-label {
  font-family: var(--font-body, 'Google Sans', sans-serif);
  font-size: 12px;
  font-weight: 500;
  fill: rgba(2, 1, 1, 0.45);
}

.forgetting-curve_x-label {
  font-family: var(--font-body, 'Google Sans', sans-serif);
  font-size: 13px;
  font-weight: 500;
  fill: rgba(2, 1, 1, 0.55);
}

/* Axis Lines & Ticks */
.forgetting-curve_axis-line {
  stroke: rgba(2, 1, 1, 0.12);
  stroke-width: 1;
}

.forgetting-curve_axis-tick {
  stroke: rgba(2, 1, 1, 0.18);
  stroke-width: 1;
}

/* Curves */
.forgetting-curve_curve--decay {
  stroke: #A8ADB7;
  stroke-width: 2.2;
  stroke-dasharray: 5 4;
  fill: none;
  stroke-linecap: round;
}

.forgetting-curve_curve--practice {
  stroke: url(#practice-curve-grad);
  stroke-width: 3;
  fill: none;
  stroke-linecap: round;
}

.forgetting-curve_area--practice {
  fill: url(#practice-area-grad);
  opacity: 0.95;
}

/* Floating "Progressing" Badge */
.forgetting-curve_badge {
  position: absolute;
  top: 45%;
  right: 12%;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #FFFFFF;
  border-radius: 9999px;
  padding: 8px 18px 8px 10px;
  box-shadow: 0 12px 30px -4px rgba(124, 58, 237, 0.14),
              0 4px 12px rgba(0, 0, 0, 0.06);
  pointer-events: none;
  z-index: 2;
  transform-origin: center center;
}

.forgetting-curve_badge-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF6A64 0%, #F84949 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 4px 10px rgba(248, 73, 73, 0.35);
}

.forgetting-curve_badge-icon svg {
  width: 17px;
  height: 17px;
}

.forgetting-curve_badge-label {
  font-family: var(--font-heading, 'Google Sans', sans-serif);
  font-size: 15px;
  font-weight: 600;
  color: #020101;
  letter-spacing: -0.2px;
}

/* Legend (Figma Node 0:4776) */
.forgetting-curve_legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-top: 24px;
  width: 100%;
}

.forgetting-curve_legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body, 'Google Sans', sans-serif);
  font-size: 13px;
  font-weight: 500;
  color: rgba(2, 1, 1, 0.65);
}

.forgetting-curve_legend-symbol--decay {
  width: 16px;
  height: 2px;
  border-top: 2px dashed #9EACB8;
  display: inline-block;
}

.forgetting-curve_legend-symbol--practice {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #803AEB;
  display: inline-block;
}

/* ============================================================
   Subtle Staggered Entrance Animation System
   ============================================================ */

.forgetting-curve.has-motion .forgetting-curve_eyebrow,
.forgetting-curve.has-motion .forgetting-curve_title,
.forgetting-curve.has-motion .forgetting-curve_text,
.forgetting-curve.has-motion .forgetting-curve_chart-wrapper,
.forgetting-curve.has-motion .forgetting-curve_legend-item {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

/* Unmasking the chart curves */
.forgetting-curve.has-motion #reveal-mask-rect {
  width: 0;
  transition: width 1.3s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Area fill fade */
.forgetting-curve.has-motion .forgetting-curve_area--practice {
  opacity: 0;
  transition: opacity 1.1s cubic-bezier(0.25, 1, 0.5, 1) 0.5s;
}

/* Progressing badge pop */
.forgetting-curve.has-motion .forgetting-curve_badge {
  opacity: 0;
  transform: scale(0.85) translateY(14px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  will-change: opacity, transform;
}

/* ---- Triggered State: is-in-view ---- */

.forgetting-curve.is-in-view .forgetting-curve_eyebrow {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.1s;
}

.forgetting-curve.is-in-view .forgetting-curve_title {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.22s;
}

.forgetting-curve.is-in-view .forgetting-curve_text:nth-child(1) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.34s;
}

.forgetting-curve.is-in-view .forgetting-curve_text:nth-child(2) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.44s;
}

.forgetting-curve.is-in-view .forgetting-curve_chart-wrapper {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.28s;
}

.forgetting-curve.is-in-view #reveal-mask-rect {
  width: 520px;
  transition-delay: 0.45s;
}

.forgetting-curve.is-in-view .forgetting-curve_area--practice {
  opacity: 0.95;
}

.forgetting-curve.is-in-view .forgetting-curve_badge {
  opacity: 1;
  transform: scale(1) translateY(0);
  transition-delay: 0.85s;
  animation: badgeFloating 4.5s ease-in-out infinite 1.5s;
}

.forgetting-curve.is-in-view .forgetting-curve_legend-item:nth-child(1) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.95s;
}

.forgetting-curve.is-in-view .forgetting-curve_legend-item:nth-child(2) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 1.05s;
}

/* Subtle Idle Floating for Progressing Badge */
@keyframes badgeFloating {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

/* ============================================================
   Responsive Breakpoints
   ============================================================ */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
  .forgetting-curve {
    padding: 90px 0 70px;
  }

  .forgetting-curve_container {
    flex-direction: column;
    align-items: center;
    padding: 0 40px;
    gap: 50px;
  }

  .forgetting-curve_content {
    flex: none;
    width: 100%;
    max-width: 100%;
    align-items: center;
    text-align: center;
  }

  .forgetting-curve_body {
    max-width: 640px;
  }

  .forgetting-curve_visual {
    flex: none;
    width: 100%;
    max-width: 520px;
  }
}

@media (max-width: 767px) {
  .forgetting-curve_title {
    font-size: 40px;
    font-weight: var(--font-weight-medium, 500);
    line-height: 1.15;
    letter-spacing: -1.2px;
  }
}

/* Mobile (max-width: 640px) */
@media (max-width: 640px) {
  .forgetting-curve {
    padding: 60px 0 50px;
  }

  .forgetting-curve_container {
    padding: 0 16px;
    gap: 36px;
  }

  .forgetting-curve_content {
    flex: none;
    width: 100%;
    max-width: 100%;
    align-items: flex-start;
    text-align: left;
  }

  .forgetting-curve_eyebrow {
    margin-bottom: 14px;
    font-size: 13px;
  }

  .forgetting-curve_title {
    font-size: 40px;
    font-weight: var(--font-weight-medium, 500);
    margin-bottom: 18px;
    letter-spacing: -1px;
  }

  .forgetting-curve_text {
    font-size: 15px;
    line-height: 1.5;
  }

  .forgetting-curve_visual {
    flex: none;
    width: 100%;
    max-width: 100%;
  }

  .forgetting-curve_chart-wrapper {
    width: 100%;
    max-width: 100%;
    overflow: visible;
  }

  .forgetting-curve_badge {
    padding: 5px 12px 5px 7px;
    right: 8%;
    top: 45%;
    gap: 6px;
  }

  .forgetting-curve_badge-icon {
    width: 24px;
    height: 24px;
  }

  .forgetting-curve_badge-icon svg {
    width: 13px;
    height: 13px;
  }

  .forgetting-curve_badge-label {
    font-size: 12px;
  }

  .forgetting-curve_legend {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 18px;
  }

  .forgetting-curve_legend-item {
    font-size: 12px;
  }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .forgetting-curve.has-motion .forgetting-curve_eyebrow,
  .forgetting-curve.has-motion .forgetting-curve_title,
  .forgetting-curve.has-motion .forgetting-curve_text,
  .forgetting-curve.has-motion .forgetting-curve_chart-wrapper,
  .forgetting-curve.has-motion .forgetting-curve_legend-item,
  .forgetting-curve.has-motion .forgetting-curve_badge,
  .forgetting-curve.has-motion .forgetting-curve_area--practice {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    animation: none !important;
  }

  .forgetting-curve.has-motion #reveal-mask-rect {
    width: 520px !important;
    transition: none !important;
  }
}