/* ============================================
   OSBORN ASSOCIATES - Social Responsibility
   ============================================ */


/* ============================================
   INTRO - Text + Quote + Commitments
   ============================================ */

.sr-intro { background-color: var(--charcoal-deep); }

.sr-intro__inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(48px, 6vw, 100px); align-items: start;
}

.sr-intro__left h2 {
  font-family: var(--font-serif); font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  font-weight: 400; line-height: 1.22; color: var(--warm-off-white);
  margin-bottom: 24px; max-width: 480px;
}
.sr-intro__left p {
  font-family: var(--font-sans); font-size: clamp(0.84rem, 0.92vw, 0.9rem);
  font-weight: 300; line-height: 1.85; color: var(--warm-stone); max-width: 460px;
}
.sr-intro__left p + p { margin-top: 18px; }

.sr-intro__right { padding-top: 8px; }

.sr-intro__quote {
  padding-left: 20px; border-left: 2px solid rgba(122,154,181,0.2); margin-bottom: 32px;
}
.sr-intro__quote p {
  font-family: var(--font-serif); font-size: clamp(1.15rem, 1.5vw, 1.35rem);
  font-weight: 400; font-style: italic; line-height: 1.5;
  color: var(--warm-off-white); opacity: 0.8; max-width: 420px;
}

.sr-commitments { display: flex; flex-direction: column; gap: 16px; }
.sr-commitment { display: flex; align-items: flex-start; gap: 14px; }
.sr-commitment__marker {
  width: 6px; height: 6px; border-radius: 50%;
  background-color: var(--muted-blue); opacity: 0.4;
  flex-shrink: 0; margin-top: 7px;
}
.sr-commitment p {
  font-family: var(--font-sans); font-size: 0.84rem; font-weight: 300;
  line-height: 1.7; color: var(--warm-stone); opacity: 0.75;
}


/* ============================================
   FOUR PILLARS - 2x2 card grid
   ============================================ */

.sr-pillars { background-color: var(--warm-off-white); }

.sr-pillars__intro { max-width: 520px; margin-bottom: clamp(40px, 5vw, 60px); }
.sr-pillars__intro h2 {
  font-family: var(--font-serif); font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  font-weight: 400; line-height: 1.22; color: var(--charcoal);
}

.sr-pillars__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(24px, 3vw, 40px); }

.sr-pillar {
  padding: clamp(28px, 3.5vw, 40px); background-color: #fff;
  border-radius: var(--radius-sm); border: 1px solid rgba(42,45,50,0.04);
  position: relative; transition: box-shadow var(--dur-slow) var(--ease);
}
.sr-pillar:hover { box-shadow: 0 8px 40px rgba(42,45,50,0.06); }
.sr-pillar::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--muted-blue) 0%, transparent 60%);
  opacity: 0.2; border-radius: 2px 2px 0 0;
  transition: opacity var(--dur-base) var(--ease);
}
.sr-pillar:hover::before { opacity: 0.4; }

.sr-pillar__number {
  font-family: var(--font-serif); font-size: 1.8rem; font-weight: 400;
  color: var(--muted-blue); opacity: 0.3; margin-bottom: 16px; line-height: 1;
}
.sr-pillar h3 {
  font-family: var(--font-serif); font-size: clamp(1.2rem, 1.6vw, 1.4rem);
  font-weight: 400; color: var(--charcoal); margin-bottom: 12px; line-height: 1.25;
}
.sr-pillar p {
  font-family: var(--font-sans); font-size: 0.8rem; font-weight: 300;
  line-height: 1.8; color: var(--slate-mid); max-width: 420px;
}
.sr-pillar p + p { margin-top: 12px; }


/* ============================================
   SUSTAINABLE ENGINEERING - Text + Stats
   ============================================ */

.sr-engineering { background-color: var(--charcoal); }

.sr-engineering__inner {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(48px, 6vw, 100px); align-items: center;
}

.sr-engineering__left h2 {
  font-family: var(--font-serif); font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  font-weight: 400; line-height: 1.22; color: var(--warm-off-white);
  margin-bottom: 24px; max-width: 480px;
}
.sr-engineering__left p {
  font-family: var(--font-sans); font-size: clamp(0.84rem, 0.92vw, 0.9rem);
  font-weight: 300; line-height: 1.85; color: var(--warm-stone); max-width: 460px;
}
.sr-engineering__left p + p { margin-top: 18px; }

.sr-engineering__stats { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px, 2vw, 24px); }

.sr-eng-stat {
  border-left: 1px solid rgba(122,154,181,0.1);
  padding: 4px 0 4px 20px;
}
.sr-eng-stat__title {
  font-family: var(--font-sans); font-size: 0.84rem; font-weight: 400;
  color: var(--warm-off-white); margin-bottom: 6px; line-height: 1.4;
}
.sr-eng-stat__text {
  font-family: var(--font-sans); font-size: 0.75rem; font-weight: 300;
  line-height: 1.7; color: var(--warm-stone); opacity: 0.6;
}


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

@media (max-width: 960px) {
  .sr-intro__inner { grid-template-columns: 1fr; gap: 40px; }
  .sr-pillars__grid { grid-template-columns: 1fr; }
  .sr-engineering__inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 600px) {
  .sr-engineering__stats { grid-template-columns: 1fr; }
}