/* ==========================================================================
   Super AI / EdTech Adaptive Learning — Case Study 5
   Theme: Dark Slate & Electric Emerald Green with Soft Pedagogical Accents
   Colors: #030712, #101828, #00C950, #052E16, #51A2FF, #A855F7, #F59E0B
   Typography: Inter & DM Sans
   ========================================================================== */

:root {
  --bg-main: #030712;
  --bg-darker: #02050B;
  --bg-card: rgba(16, 24, 40, 0.75);
  --bg-card-hover: rgba(20, 36, 48, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-subtle: #1E2939;
  --border-glow: rgba(0, 201, 80, 0.35);
  
  /* Primary Emerald Green Theme */
  --primary-green: #00C950;
  --primary-green-soft: rgba(0, 201, 80, 0.12);
  --primary-green-glow: rgba(0, 201, 80, 0.3);
  --accent-mint: #34D399;
  --accent-light: #A7F3D0;
  
  /* Supporting Accents */
  --accent-blue: #3B82F6;
  --accent-cyan: #51A2FF;
  --accent-purple: #A855F7;
  --accent-amber: #F59E0B;
  --accent-red: #EF4444;

  /* Typography Colors */
  --text-white: #FFFFFF;
  --text-muted: #D1D5DC;
  --text-dim: #9CA3AF;
  --text-dark: #6A7282;

  /* Fonts & Max Widths */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --container-max: 1240px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-main);
  color: var(--text-white);
  font-family: var(--font-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-main);
  color: var(--text-white);
  overflow-x: hidden;
  line-height: 1.6;
}

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

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

/* Container */
.slb-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.slb-container--wide {
  max-width: 1280px;
}

/* Section Header Shared */
.slb-section-header {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 56px;
}

.slb-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  background: var(--primary-green-soft);
  border: 1px solid rgba(0, 201, 80, 0.25);
  border-radius: 8px;
  color: var(--primary-green);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.15px;
  text-transform: capitalize;
  margin-bottom: 20px;
}

.slb-badge--hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  padding: 0 14px;
  background: rgba(0, 201, 80, 0.16);
  border: 1px solid rgba(0, 201, 80, 0.35);
  border-radius: 999px;
  color: var(--primary-green);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  width: fit-content;
  margin-bottom: 0;
}

.slb-section-title {
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-white);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.slb-section-sub {
  font-size: clamp(16px, 1.4vw, 20px);
  color: var(--text-dim);
  line-height: 1.5;
}

/* ==========================================================================
   1. EnhancedHero Section
   ========================================================================== */
.slb-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: clamp(36px, 5vh, 52px) 24px clamp(48px, 6vh, 64px);
  background-color: var(--bg-main);
  overflow: hidden;
  gap: clamp(24px, 4vh, 48px);
}

.slb-hero__bg-wrap {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

.slb-hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  transform: scale(1.02);
  filter: brightness(0.68) contrast(1.08);
}

.slb-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, 
    rgba(3, 7, 18, 0.82) 0%, 
    rgba(3, 7, 18, 0.45) 35%, 
    rgba(2, 46, 22, 0.45) 70%, 
    rgba(3, 7, 18, 0.96) 100%
  );
  z-index: 1;
  pointer-events: none;
}

.slb-hero__top {
  position: relative;
  z-index: 10;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
}

.slb-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: var(--text-white);
  font-size: 14px;
  font-weight: 500;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.25s ease;
  cursor: pointer;
}

.slb-back-btn:hover {
  background: rgba(0, 201, 80, 0.15);
  border-color: rgba(0, 201, 80, 0.4);
  color: var(--primary-green);
  transform: translateX(-3px);
}

.slb-hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.slb-hero__title {
  font-size: clamp(32px, 4.2vw, 60px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-white);
  letter-spacing: -0.025em;
  max-width: 1050px;
}

.slb-hero__subtitle {
  font-size: clamp(18px, 1.8vw, 24px);
  font-weight: 400;
  line-height: 1.45;
  color: var(--text-muted);
  max-width: 880px;
  margin-bottom: 24px;
}

.slb-hero__meta-card {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  background: rgba(16, 24, 40, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 24px 32px;
  backdrop-filter: blur(12px);
  max-width: 840px;
}

.slb-meta-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.slb-meta-col__label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.slb-meta-col__value {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-white);
}

.slb-tools-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.slb-tool-pill {
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

.slb-hero__bottom {
  position: relative;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 32px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: fit-content;
  transition: color 0.25s ease;
  cursor: pointer;
}

.slb-hero__bottom:hover {
  color: var(--primary-green);
}

.slb-scroll-arrow {
  animation: bounceDown 2s infinite ease-in-out;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ==========================================================================
   2. The Context Section
   ========================================================================== */
.slb-context {
  padding: 100px 0;
  background-color: var(--bg-main);
  position: relative;
}

.slb-context__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}

.slb-context__heading {
  font-size: clamp(32px, 3.8vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-white);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.slb-context__prose {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.slb-image-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.slb-image-card:hover {
  border-color: var(--primary-green-glow);
  box-shadow: 0 20px 50px rgba(0, 201, 80, 0.15);
}

.slb-image-overlay-zoom {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(3, 7, 18, 0.7);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  opacity: 0;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.slb-image-card:hover .slb-image-overlay-zoom {
  opacity: 1;
  transform: scale(1.05);
}

.slb-context__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.slb-image-card:hover .slb-context__img {
  transform: scale(1.02);
}

/* ==========================================================================
   3. Problem Definition / Challenge
   ========================================================================== */
.slb-problem {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-main) 0%, #06150D 50%, var(--bg-main) 100%);
  position: relative;
}

.slb-problem__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.slb-problem-card {
  position: relative;
  background: rgba(16, 24, 40, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
  overflow: hidden;
  transform-style: preserve-3d;
  will-change: transform;
}

/* Animated Left Vertical Beam (Matching CS1 - Emerald / EdTech Accent) */
.slb-problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: linear-gradient(180deg, #00C950, #34D399);
  transition: height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2;
  pointer-events: none;
}

/* Mouse Spotlight Layer */
.slb-interactive-card {
  position: relative;
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}

.slb-interactive-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    380px circle at var(--mouse-x, -999px) var(--mouse-y, -999px),
    rgba(0, 201, 80, 0.15),
    transparent 70%
  );
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.slb-interactive-card:hover::after {
  opacity: 1;
}

.slb-problem-card:hover {
  transform: translateY(-5px);
  border-color: #00C950;
  box-shadow: 0 12px 28px -6px rgba(3, 7, 18, 0.8), 0 0 20px rgba(0, 201, 80, 0.25);
}

.slb-problem-card:hover::before {
  height: 100%;
}

.slb-problem-card__top {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.slb-problem-card__icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 201, 80, 0.12);
  border: 1px solid rgba(0, 201, 80, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-green);
  flex-shrink: 0;
}

.slb-problem-card__icon-badge--amber {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.25);
  color: var(--accent-amber);
}

.slb-problem-card__icon-badge--blue {
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.25);
  color: var(--accent-blue);
}

.slb-problem-card__icon-badge--purple {
  background: rgba(168, 85, 247, 0.12);
  border-color: rgba(168, 85, 247, 0.25);
  color: var(--accent-purple);
}

.slb-problem-card__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: -0.01em;
}

.slb-problem-card__desc {
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ==========================================================================
   4. My Responsibility Section (Green Gradient Banner)
   ========================================================================== */
.slb-responsibility {
  padding: 40px 0 100px;
}

.slb-resp-banner {
  background: linear-gradient(135deg, #022912 0%, #027430 100%);
  border: 1px solid rgba(0, 201, 80, 0.35);
  border-radius: 24px;
  padding: 56px 48px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.slb-resp-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.slb-resp-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
}

.slb-resp-title {
  font-size: clamp(26px, 2.5vw, 36px);
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: -0.015em;
}

.slb-resp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.slb-resp-card {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, background 0.25s ease;
}

.slb-resp-card:hover {
  transform: translateY(-4px);
  background: rgba(0, 0, 0, 0.35);
}

.slb-resp-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-green);
  color: #030712;
  font-size: 16px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slb-resp-text {
  font-size: 15px;
  line-height: 1.55;
  color: #E6F4EA;
}

/* ==========================================================================
   5. Process Timeline Narrative ("What it is?")
   ========================================================================== */
.slb-narrative {
  padding: 100px 0;
  background: linear-gradient(180deg, #101828 0%, #030712 100%);
}

.slb-narrative__intro {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 72px;
}

.slb-narrative__main-title {
  font-size: clamp(32px, 3.6vw, 48px);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.slb-narrative__main-lead {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-muted);
}

.slb-narrative__rows {
  display: flex;
  flex-direction: column;
  gap: 72px;
}

.slb-narrative-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.slb-narrative-row--reverse .slb-narrative-row__content {
  order: 1;
}

.slb-narrative-row--reverse .slb-narrative-row__media {
  order: 2;
}

.slb-row-step {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 12px;
}

.slb-row-heading {
  font-size: clamp(26px, 2.6vw, 38px);
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.015em;
}

.slb-row-prose {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-muted);
}

.slb-conclusion-banner {
  background: rgba(16, 24, 40, 0.8);
  border: 1px solid rgba(0, 201, 80, 0.3);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
  max-width: 960px;
  margin: 32px auto 0;
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.slb-conclusion-title {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}

.slb-conclusion-text {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ==========================================================================
   6. My UX Process Section
   ========================================================================== */
.slb-process-section {
  padding: 100px 0;
  background-color: var(--bg-main);
}

.slb-process-phase {
  margin-bottom: 96px;
}

.slb-phase-header {
  margin-bottom: 40px;
}

.slb-phase-title {
  font-size: clamp(26px, 2.6vw, 36px);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
  letter-spacing: -0.015em;
}

.slb-phase-sub {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 800px;
}

/* Phase 1: Research Findings Grid */
.slb-research-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.slb-research-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease;
  cursor: pointer;
}

.slb-research-card:hover {
  border-color: rgba(0, 201, 80, 0.4);
}

.slb-research-card__img-wrap {
  position: relative;
  background: #0B1120;
  overflow: hidden;
}

.slb-research-card__img-wrap img {
  width: 100%;
  height: auto;
  transition: transform 0.35s ease;
}

.slb-research-card:hover .slb-research-card__img-wrap img {
  transform: scale(1.02);
}

.slb-research-card__caption {
  padding: 24px;
}

.slb-research-card__caption h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}

.slb-research-card__caption p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Phase 2: Pain Points */
.slb-pain-points-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.slb-pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.slb-pain-card:hover {
  border-color: rgba(0, 201, 80, 0.4);
}

.slb-pain-card__num {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(0, 201, 80, 0.15);
  border: 1px solid rgba(0, 201, 80, 0.3);
  color: var(--primary-green);
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slb-pain-card__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
}

.slb-pain-card__desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
  flex-grow: 1;
}

.slb-pain-card__tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-green);
  background: rgba(0, 201, 80, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  width: fit-content;
}

/* Phase 3: Ideation (User Flow, Card Sorting, IA) */
.slb-ideation-grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.slb-ideation-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  overflow: hidden;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.slb-ideation-card:hover {
  border-color: rgba(0, 201, 80, 0.4);
  box-shadow: 0 16px 40px rgba(0, 201, 80, 0.1);
}

.slb-ideation-card__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}

.slb-ideation-card__sub {
  font-size: 15px;
  color: var(--text-muted);
}

.slb-ideation-card__img-wrap {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #1E293B;
  background: #0A101D;
  cursor: pointer;
}

.slb-ideation-card__img-wrap img {
  width: 100%;
  height: auto;
  transition: transform 0.35s ease;
}

.slb-ideation-card:hover .slb-ideation-card__img-wrap img {
  transform: scale(1.015);
}

/* Phase 4: Prototyping (Low-Fi & Hi-Fi) */
.slb-proto-subblock {
  margin-bottom: 56px;
}

.slb-proto-subhead {
  margin-bottom: 24px;
}

.slb-proto-subtitle {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}

.slb-proto-subdesc {
  font-size: 15px;
  color: var(--text-dim);
}

.slb-lofi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.slb-lofi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px;
  cursor: pointer;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.slb-lofi-card:hover {
  border-color: rgba(0, 201, 80, 0.4);
}

.slb-lofi-card__img-wrap {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
}

.slb-lofi-card__img-wrap img {
  width: 100%;
  height: auto;
  transition: transform 0.3s ease;
}

.slb-lofi-card:hover .slb-lofi-card__img-wrap img {
  transform: scale(1.02);
}

.slb-lofi-card__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-white);
  text-align: center;
}

.slb-hifi-stack {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.slb-hifi-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  overflow: hidden;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  cursor: pointer;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.slb-hifi-item:hover {
  border-color: rgba(0, 201, 80, 0.45);
  box-shadow: 0 20px 50px rgba(0, 201, 80, 0.12);
}

.slb-hifi-item__img-wrap {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
}

.slb-hifi-item__img-wrap img {
  width: 100%;
  height: auto;
  transition: transform 0.35s ease;
}

.slb-hifi-item:hover .slb-hifi-item__img-wrap img {
  transform: scale(1.015);
}

.slb-hifi-item__caption h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}

.slb-hifi-item__caption p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ==========================================================================
   7. Key Learnings & Reflections Section
   ========================================================================== */
.slb-reflection {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-main) 0%, #06150D 50%, var(--bg-main) 100%);
}

.slb-reflection__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.slb-reflection-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.slb-reflection-card:hover {
  border-color: rgba(0, 201, 80, 0.4);
}

.slb-reflection-card__badge {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: 6px;
  width: fit-content;
}

.slb-reflection-card__badge--blue {
  background: #DBEAFE;
  color: #1E40AF;
}

.slb-reflection-card__badge--purple {
  background: #F3E8FF;
  color: #6B21A8;
}

.slb-reflection-card__badge--green {
  background: #DCFCE7;
  color: #15803D;
}

.slb-reflection-card__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
}

.slb-reflection-card__text {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ==========================================================================
   8. Next Project Card
   ========================================================================== */
.slb-next {
  padding: 40px 0 100px;
}

.slb-next__card {
  display: block;
  background: linear-gradient(135deg, rgba(16, 24, 40, 0.8) 0%, rgba(2, 41, 18, 0.6) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 56px 48px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.slb-next__card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 201, 80, 0.4);
  box-shadow: 0 20px 50px rgba(0, 201, 80, 0.12);
}

.slb-next__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 12px;
}

.slb-next__title {
  font-size: clamp(24px, 2.8vw, 36px);
  font-weight: 700;
  color: var(--text-white);
  max-width: 800px;
  margin: 0 auto 24px;
  line-height: 1.25;
}

.slb-next__arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-white);
  padding: 10px 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  transition: all 0.25s ease;
}

.slb-next__card:hover .slb-next__arrow {
  background: var(--primary-green);
  color: #030712;
  border-color: var(--primary-green);
  transform: translateX(4px);
}

/* ==========================================================================
   9. Footer (Strictly 2-Line Headline Standard)
   ========================================================================== */
.slb-footer {
  padding: 100px 0 60px;
  background-color: var(--bg-darker);
  border-top: 1px solid var(--border-subtle);
  position: relative;
}

.slb-footer__top {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Standard 2-Line Headline Clamped */
.slb-footer__headline {
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.15;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.slb-footer__email {
  font-size: clamp(18px, 2vw, 28px);
  font-weight: 500;
  color: var(--primary-green);
  margin-bottom: 32px;
  transition: opacity 0.2s ease;
}

.slb-footer__email:hover {
  opacity: 0.85;
}

.slb-back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.25s ease;
}

.slb-back-to-top:hover {
  background: rgba(0, 201, 80, 0.15);
  border-color: rgba(0, 201, 80, 0.3);
  color: var(--primary-green);
}

.slb-footer__divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin-bottom: 56px;
}

.slb-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  margin-bottom: 56px;
}

.slb-footer__brand {
  display: flex;
  gap: 16px;
  max-width: 460px;
}

.slb-footer__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00C950 0%, #2B7FFF 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #FFFFFF;
  flex-shrink: 0;
}

.slb-footer__name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  display: block;
  margin-bottom: 6px;
}

.slb-footer__bio {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
}

.slb-footer__nav-group {
  display: flex;
  gap: 64px;
}

.slb-footer__col-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 16px;
}

.slb-footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.slb-footer__links a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.slb-footer__links a:hover {
  color: var(--primary-green);
}

.slb-footer__legal {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-dark);
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.slb-footer__legal-links {
  display: flex;
  gap: 24px;
}

.slb-footer__legal-links a {
  color: var(--text-dark);
  transition: color 0.2s ease;
}

.slb-footer__legal-links a:hover {
  color: var(--text-dim);
}

/* ==========================================================================
   10. Lightbox Modal
   ========================================================================== */
.slb-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.slb-lightbox.is-active {
  opacity: 1;
  visibility: visible;
}

.slb-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 7, 18, 0.88);
  backdrop-filter: blur(16px);
}

.slb-lightbox__content {
  position: relative;
  z-index: 10;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slb-lightbox__img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.slb-lightbox__close {
  position: absolute;
  top: -48px;
  right: 0;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  cursor: pointer;
  transition: background 0.2s ease;
}

.slb-lightbox__close:hover {
  background: rgba(0, 201, 80, 0.3);
  color: var(--primary-green);
}

/* ==========================================================================
   10. Floating Back to Top Button
   ========================================================================== */
.slb-floating-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(11, 19, 43, 0.88);
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 9999;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 201, 80, 0.3);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(20px) scale(0.9);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.slb-floating-top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.slb-floating-top:hover {
  background: #2B7FFF;
  border-color: #FFFFFF;
  color: #FFFFFF;
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 15px 30px -5px rgba(43, 127, 255, 0.6), 0 0 25px rgba(43, 127, 255, 0.5);
}

.slb-floating-top__arrow {
  animation: bounceUp 2s infinite ease-in-out;
}

@keyframes bounceUp {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.slb-floating-top__tooltip {
  position: absolute;
  right: 68px;
  background: rgba(16, 24, 40, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: #FFFFFF;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translateX(6px);
  transition: all 0.2s ease;
}

.slb-floating-top:hover .slb-floating-top__tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* ==========================================================================
   11. Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .slb-context__grid,
  .slb-narrative-row,
  .slb-narrative-row--reverse {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .slb-narrative-row--reverse .slb-narrative-row__content {
    order: unset;
  }

  .slb-narrative-row--reverse .slb-narrative-row__media {
    order: unset;
  }

  .slb-resp-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .slb-problem__grid,
  .slb-research-grid,
  .slb-pain-points-grid,
  .slb-lofi-grid,
  .slb-reflection__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .slb-hero__meta-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .slb-footer__bottom {
    flex-direction: column;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .slb-hero {
    padding: 24px 16px 40px;
    min-height: auto;
    gap: 32px;
  }

  .slb-badge--hero {
    height: 26px;
    font-size: 11.5px;
    padding: 0 12px;
  }

  .slb-floating-top {
    right: 20px;
    bottom: 20px;
    width: 48px;
    height: 48px;
  }

  .slb-hero__title {
    font-size: clamp(28px, 6.5vw, 42px);
    line-height: 1.18;
  }

  .slb-hero__subtitle {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 16px;
  }

  .slb-hero__meta-card {
    grid-template-columns: 1fr;
    padding: 20px 18px;
    gap: 16px;
  }

  .slb-resp-banner {
    padding: 32px 20px;
  }

  .slb-resp-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .slb-section-title {
    font-size: clamp(26px, 5.5vw, 36px);
  }

  .slb-ideation-card {
    padding: 18px;
  }

  .slb-hifi-item {
    padding: 14px;
  }

  .slb-next__card {
    padding: 40px 24px;
  }

  .slb-conclusion-banner {
    padding: 32px 20px;
  }

  .slb-footer {
    padding: 60px 0 40px;
  }

  .slb-footer__headline {
    font-size: clamp(28px, 7vw, 44px);
  }

  .slb-footer__nav-group {
    flex-direction: column;
    gap: 32px;
  }

  .slb-footer__legal {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .slb-hero {
    padding: 20px 14px 36px;
    gap: 24px;
  }

  .slb-hero__title {
    font-size: 26px;
  }

  .slb-hero__subtitle {
    font-size: 14.5px;
  }

  .slb-hero__meta-card {
    padding: 16px 14px;
    gap: 14px;
  }

  .slb-meta-col__label {
    font-size: 11px;
  }

  .slb-meta-col__value {
    font-size: 15px;
  }

  .slb-tools-list {
    gap: 6px;
  }

  .slb-tool-pill {
    padding: 2px 8px;
    font-size: 11px;
  }

  .slb-problem-card {
    padding: 20px 16px;
  }

  .slb-reflection-card {
    padding: 24px 16px;
  }

  .slb-next__card {
    padding: 32px 16px;
  }

  .slb-next__title {
    font-size: 20px;
  }
}