/* ============================================
   DESIGN SYSTEM — TOKENS
   ============================================ */
:root {
  --color-bg: #ffffff;
  --color-surface: #f8f9fa;
  --color-surface-2: #f1f3f5;
  --color-border: #e9ecef;
  --color-text: #0d0d0d;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;
  --color-accent: #2563eb;
  --color-accent-light: #eff6ff;
  --color-accent-hover: #1d4ed8;
  --color-success: #059669;
  --color-warning: #d97706;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  --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;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-accent: 0 4px 20px rgba(37,99,235,0.2);

  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;

  --nav-height: 64px;
  --container-max: 1100px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

/* ============================================
   TYPOGRAPHY SYSTEM
   ============================================ */
.section-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-12);
  max-width: 560px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(37,99,235,0.3);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--secondary:hover {
  background: var(--color-surface-2);
  transform: translateY(-1px);
}

.btn--nav {
  background: var(--color-text);
  color: #fff;
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-sm);
}
.btn--nav:hover { background: #333; }

.btn--full { width: 100%; justify-content: center; }

/* ============================================
   NAV
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav__logo {
  font-size: var(--font-size-lg);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav__links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--color-text); }
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero__inner {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-success);
  background: #ecfdf5;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}
.hero__eyebrow::before {
  content: '';
  width: 8px; height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}
.hero__name {
  font-size: clamp(var(--font-size-5xl), 8vw, var(--font-size-6xl));
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: var(--space-4);
}
.hero__title {
  font-size: var(--font-size-xl);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}
.hero__value {
  font-size: clamp(var(--font-size-xl), 2.5vw, var(--font-size-2xl));
  font-weight: 600;
  line-height: 1.4;
  max-width: 640px;
  margin-bottom: var(--space-10);
  color: var(--color-text);
}
.hero__ctas {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-16);
}
.hero__scroll {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 40px;
  height: 1px;
  background: var(--color-text-tertiary);
}

/* ============================================
   ABOUT
   ============================================ */
.about { background: var(--color-surface); }
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}
.about__text p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
  font-size: var(--font-size-lg);
  line-height: 1.75;
}
.about__text p:last-child { margin-bottom: 0; }
.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transition: box-shadow var(--transition), transform var(--transition);
}
.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.stat-card__number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-accent);
}
.stat-card__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ============================================
   ACHIEVEMENTS
   ============================================ */
.achievements__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}
.achievement-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}
.achievement-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}
.achievement-card:hover::before { transform: scaleX(1); }
.achievement-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.achievement-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-4);
}
.achievement-card__metric {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}
.achievement-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.achievement-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}
.achievement-card__tag {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* ============================================
   CASE STUDIES
   ============================================ */
.case-studies { background: var(--color-surface); }

.case-study {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-8);
  transition: box-shadow var(--transition);
}
.case-study:hover { box-shadow: var(--shadow-lg); }

.case-study__header {
  padding: var(--space-10) var(--space-10) var(--space-8);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.case-study__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.case-study__number {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-text-tertiary);
  letter-spacing: 0.1em;
}
.case-study__tag {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}
.case-study__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}
.case-study__summary {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
}

.case-study__body {
  padding: var(--space-10);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.cs-block__label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}
.cs-block p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.cs-steps {
  list-style: none;
  counter-reset: steps;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.cs-steps li {
  counter-increment: steps;
  display: flex;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
}
.cs-steps li::before {
  content: counter(steps);
  min-width: 22px;
  height: 22px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}
.cs-steps li strong { color: var(--color-text); }

.cs-block--impact {
  grid-column: 1 / -1;
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.cs-block--impact .cs-block__label { color: var(--color-accent); }

.impact-metrics {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.impact-metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.impact-metric__value {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-accent);
}
.impact-metric__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ============================================
   SKILLS
   ============================================ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}
.skills-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--transition);
}
.skills-group:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.skills-group__icon {
  font-size: 1.75rem;
  margin-bottom: var(--space-4);
}
.skills-group__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
}
.skills-group__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.tag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  transition: all var(--transition);
}
.tag:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ============================================
   EXPERIENCE TIMELINE
   ============================================ */
.experience { background: var(--color-surface); }
.timeline {
  margin-top: var(--space-10);
  position: relative;
  padding-left: var(--space-8);
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--color-border);
}
.timeline__item {
  position: relative;
  margin-bottom: var(--space-12);
}
.timeline__item:last-child { margin-bottom: 0; }
.timeline__marker {
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: 8px;
  width: 11px; height: 11px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}
.timeline__content {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition);
}
.timeline__content:hover { box-shadow: var(--shadow-md); }
.timeline__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.timeline__role {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-1);
}
.timeline__company {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.timeline__period {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
  background: var(--color-accent-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}
.timeline__summary {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.65;
}
.timeline__outcomes {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.timeline__outcomes li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.6;
}
.timeline__outcomes li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

/* ============================================
   HOW I THINK
   ============================================ */
.thinking__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}
.thinking-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--transition);
}
.thinking-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.thinking-card__number {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}
.thinking-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.thinking-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.65;
}
.thinking-card__note {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  margin-top: var(--space-4);
  font-style: italic;
}

/* Flow diagram */
.thinking-card__flow {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.flow-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}
.flow-step__icon { font-size: 1.1rem; flex-shrink: 0; }
.flow-step__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}
.flow-step__text strong { color: var(--color-text); }
.flow-arrow {
  text-align: center;
  color: var(--color-accent);
  font-size: var(--font-size-lg);
  font-weight: 700;
  line-height: 1;
}

/* RCA layers */
.thinking-card__rca {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.rca-layer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}
.rca-layer__label {
  font-weight: 700;
  min-width: 60px;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.rca-layer__text { color: var(--color-text-secondary); }
.rca-layer--1 { background: #fef3c7; }
.rca-layer--1 .rca-layer__label { color: #92400e; }
.rca-layer--2 { background: #fde8d8; }
.rca-layer--2 .rca-layer__label { color: #9a3412; }
.rca-layer--3 { background: #fce7f3; }
.rca-layer--3 .rca-layer__label { color: #9d174d; }
.rca-layer--4 { background: var(--color-accent-light); }
.rca-layer--4 .rca-layer__label { color: var(--color-accent); }

/* Decision matrix */
.thinking-card__matrix {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: var(--space-2);
}
.matrix-header {
  display: contents;
}
.matrix-header span {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  padding: var(--space-2);
  text-align: center;
}
.matrix-row {
  display: contents;
}
.matrix-row__label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  padding-right: var(--space-2);
}
.matrix-cell {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: center;
}
.matrix-cell--do { background: #dcfce7; color: #166534; }
.matrix-cell--fill { background: var(--color-surface-2); color: var(--color-text-secondary); }
.matrix-cell--plan { background: var(--color-accent-light); color: var(--color-accent); }
.matrix-cell--skip { background: #fee2e2; color: #991b1b; }

/* Stakeholder grid */
.thinking-card__stakeholder { position: relative; }
.stakeholder-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.sg-cell {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  line-height: 1.5;
}
.sg-cell small { color: var(--color-text-tertiary); }
.sg-cell--manage { background: var(--color-accent-light); color: var(--color-accent); }
.sg-cell--keep { background: #fef3c7; color: #92400e; }
.sg-cell--inform { background: #dcfce7; color: #166534; }
.sg-cell--monitor { background: var(--color-surface-2); color: var(--color-text-secondary); }
.stakeholder-axes {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  font-weight: 500;
}

/* ============================================
   TESTIMONIALS
   ============================================ */
.testimonials { background: var(--color-surface); }
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}
.testimonial-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transition: box-shadow var(--transition), transform var(--transition);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.testimonial-card__quote {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.75;
  font-style: italic;
  flex: 1;
}
.testimonial-card__quote::before { content: '"'; }
.testimonial-card__quote::after { content: '"'; }
.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.testimonial-card__avatar {
  width: 40px; height: 40px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}
.testimonial-card__name {
  font-size: var(--font-size-sm);
  font-weight: 700;
}
.testimonial-card__title {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* ============================================
   CONTACT
   ============================================ */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}
.contact__text p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}
.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.contact__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
}
.contact__link:hover { color: var(--color-accent); }
.contact__link-icon { font-size: 1.1rem; }

.contact__form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}
.form-group input,
.form-group textarea {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-tertiary);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.5);
  padding: var(--space-8) 0;
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer__copy { font-size: var(--font-size-sm); }
.footer__links a {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}
.footer__links a:hover { color: #fff; }

/* ============================================
   SCROLL REVEAL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.15s; }
.reveal:nth-child(4) { transition-delay: 0.2s; }
.reveal:nth-child(5) { transition-delay: 0.25s; }
.reveal:nth-child(6) { transition-delay: 0.3s; }

/* ============================================
   RESPONSIVE — TABLET (≤ 900px)
   ============================================ */
@media (max-width: 900px) {
  .section-title { font-size: var(--font-size-3xl); }

  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-6);
    gap: var(--space-5);
    box-shadow: var(--shadow-md);
    z-index: 99;
  }
  .nav__hamburger { display: flex; }

  .about__inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .about__stats { grid-template-columns: repeat(4, 1fr); }

  .achievements__grid { grid-template-columns: 1fr; }

  .case-study__header { padding: var(--space-8); }
  .case-study__body {
    grid-template-columns: 1fr;
    padding: var(--space-8);
  }
  .cs-block--impact { grid-column: 1; }

  .skills__grid { grid-template-columns: 1fr; }

  .thinking__grid { grid-template-columns: 1fr; }

  .testimonials__grid { grid-template-columns: 1fr; }

  .contact__inner { grid-template-columns: 1fr; gap: var(--space-10); }
}

/* ============================================
   RESPONSIVE — MOBILE (≤ 600px)
   ============================================ */
@media (max-width: 600px) {
  :root { --container-max: 100%; }
  .container { padding: 0 var(--space-5); }
  .section { padding: var(--space-16) 0; }

  .section-title { font-size: var(--font-size-2xl); }

  .hero__ctas { flex-direction: column; }
  .hero__ctas .btn { width: 100%; justify-content: center; }

  .about__stats { grid-template-columns: 1fr 1fr; }

  .case-study__title { font-size: var(--font-size-2xl); }

  .impact-metrics { flex-direction: column; gap: var(--space-4); }

  .timeline { padding-left: var(--space-6); }
  .timeline__header { flex-direction: column; gap: var(--space-2); }

  .footer__inner { flex-direction: column; gap: var(--space-3); text-align: center; }
}

/* Active nav link */
.nav__links a.active { color: var(--color-text); font-weight: 600; }