/* ============================================
   NABIATEC - Sustainability, EV, CSST
   ============================================ */

/* ─── Sustainability ─── */
.sustain { background: var(--white); padding: var(--section-pad) 0; position: relative; }
.sustain-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.sustain-text p { color: var(--gray-dark); line-height: 1.85; font-size: 1rem; margin-bottom: 18px; }
.esg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 40px; }
.esg-card { padding: 32px 20px; border: 1.5px solid rgba(0,0,0,0.08); border-radius: 8px; text-align: center; transition: all 0.4s var(--ease-smooth); position: relative; overflow: hidden; background: var(--white); }
.esg-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--gold-primary), var(--gold-light)); transform: scaleX(0); transition: transform 0.4s var(--ease-smooth); }
.esg-card:hover::before { transform: scaleX(1); }
.esg-card:hover { border-color: var(--gold-primary); background: var(--gold-glow); transform: translateY(-6px); box-shadow: var(--shadow-card); }
.esg-icon { font-size: 1.8rem; margin-bottom: 14px; transition: transform 0.3s; }
.esg-card:hover .esg-icon { transform: scale(1.2); }
.esg-card strong { display: block; font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; color: var(--black-primary); }
.sustain-visual { position: relative; overflow: hidden; border-radius: 8px; box-shadow: var(--shadow-dark); }
.sustain-img { width: 100%; border-radius: 8px; display: block; object-fit: cover; transition: transform 1.2s var(--ease-smooth); filter: brightness(0.95) contrast(1.05); }
.sustain-visual:hover .sustain-img { transform: scale(1.05); }
.sustain-kpi { position: absolute; bottom: -24px; left: -24px; background: linear-gradient(135deg, var(--teal-accent), #15a08a); color: var(--white); padding: 28px 36px; border-radius: 8px; box-shadow: 0 12px 32px rgba(30,184,160,0.25); z-index: 2; }
.sustain-kpi .big { font-family: var(--font-display); font-size: 2.6rem; font-weight: 800; display: block; line-height: 1; }
.sustain-kpi .sml { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 2px; text-transform: uppercase; opacity: 0.9; margin-top: 4px; }

/* ─── EV Charging ─── */
.ev-charging { background: linear-gradient(180deg, var(--black-primary) 0%, var(--black-secondary) 100%); padding: var(--section-pad) 0; position: relative; }
.ev-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.ev-card { background: rgba(255,255,255,0.03); border: 1.5px solid var(--border-subtle); border-radius: 8px; padding: 40px 28px; text-align: center; transition: all 0.5s var(--ease-smooth); position: relative; overflow: hidden; backdrop-filter: blur(8px); }
.ev-card::before { content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 0; background: linear-gradient(180deg, var(--gold-primary), var(--gold-light)); transition: height 1.2s var(--ease-smooth); }
.ev-card:hover::before { height: 100%; }
.ev-card:hover { border-color: var(--border-gold); background: rgba(200,155,60,0.05); transform: translateY(-8px); box-shadow: 0 20px 48px rgba(0,0,0,0.25); }
.ev-icon { width: 64px; height: 64px; background: rgba(200,155,60,0.12); border-radius: 14px; display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; transition: all 0.4s var(--ease-smooth); position: relative; }
.ev-icon::after { content: ''; position: absolute; inset: -5px; border: 2px solid var(--gold-primary); border-radius: 18px; opacity: 0; transition: opacity 0.4s; }
.ev-card:hover .ev-icon::after { opacity: 0.25; }
.ev-icon i { color: var(--gold-primary); font-size: 1.6rem; }
.ev-card h3 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.ev-card p { font-size: 0.88rem; color: rgba(255,255,255,0.6); line-height: 1.65; }
.ev-card .ev-meta { font-family: var(--font-mono); font-size: 0.72rem; color: var(--gold-primary); letter-spacing: 1px; display: block; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border-subtle); }

/* ─── CSST ─── */
.csst { background: linear-gradient(135deg, var(--black-primary) 0%, var(--black-secondary) 50%, var(--black-primary) 100%); padding: var(--section-pad) 0; position: relative; overflow: hidden; }
.csst::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--gold-primary), var(--teal-accent), var(--gold-primary), transparent); opacity: 0.3; }
.csst-bg-pattern { position: absolute; inset: 0; background-image: radial-gradient(circle at 20% 50%, rgba(200,155,60,0.05) 0%, transparent 50%), radial-gradient(circle at 80% 50%, rgba(30,184,160,0.05) 0%, transparent 50%); pointer-events: none; }
.csst-header { text-align: center; margin-bottom: 56px; }
.csst-header .section-eyebrow { justify-content: center; }
.csst-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 56px; }
.csst-card { background: rgba(255,255,255,0.03); border: 1.5px solid var(--border-subtle); border-radius: 12px; padding: 36px; transition: all 0.5s var(--ease-smooth); position: relative; overflow: hidden; backdrop-filter: blur(12px); }
.csst-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--gold-primary), var(--teal-accent), var(--gold-primary)); transform: scaleX(0); transition: transform 0.5s var(--ease-smooth); }
.csst-card:hover::before { transform: scaleX(1); }
.csst-card:hover { border-color: var(--border-gold); background: rgba(255,255,255,0.05); transform: translateY(-6px); box-shadow: 0 24px 48px rgba(0,0,0,0.2); }
.csst-card-icon { width: 56px; height: 56px; background: linear-gradient(135deg, rgba(200,155,60,0.15), rgba(30,184,160,0.1)); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; transition: all 0.4s; }
.csst-card:hover .csst-card-icon { transform: scale(1.1) rotate(5deg); background: linear-gradient(135deg, rgba(200,155,60,0.25), rgba(30,184,160,0.15)); }
.csst-card-icon i { font-size: 1.4rem; color: var(--gold-primary); }
.csst-card h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.csst-card p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; margin-bottom: 16px; }
.csst-features { display: flex; flex-wrap: wrap; gap: 6px; }
.csst-feature-tag { padding: 5px 12px; background: rgba(200,155,60,0.1); border: 1px solid var(--border-gold); border-radius: 20px; font-family: var(--font-mono); font-size: 0.68rem; color: var(--gold-primary); letter-spacing: 0.5px; transition: all 0.3s; }
.csst-feature-tag:hover { background: var(--gold-primary); color: var(--black-primary); }
.csst-stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; background: rgba(255,255,255,0.03); border: 1.5px solid var(--border-subtle); border-radius: 12px; padding: 36px; backdrop-filter: blur(12px); }
.csst-stat { text-align: center; position: relative; }
.csst-stat:not(:last-child)::after { content: ''; position: absolute; right: -10px; top: 50%; transform: translateY(-50%); width: 1px; height: 36px; background: var(--border-subtle); }
.csst-stat-num { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: var(--gold-primary); line-height: 1; margin-bottom: 6px; }
.csst-stat-label { font-family: var(--font-mono); font-size: 0.68rem; color: rgba(255,255,255,0.5); letter-spacing: 1.5px; text-transform: uppercase; }

@media (max-width: 1100px) {
  .sustain-layout { grid-template-columns: 1fr; gap: 48px; }
  .ev-grid { grid-template-columns: repeat(2, 1fr); }
  .csst-grid { grid-template-columns: 1fr; }
  .csst-stats-bar { grid-template-columns: repeat(2, 1fr); }
  .csst-stat:not(:last-child)::after { display: none; }
}

@media (max-width: 768px) {
  .esg-grid { grid-template-columns: 1fr; }
  .sustain-kpi { bottom: -12px; left: -12px; padding: 16px 20px; }
  .sustain-kpi .big { font-size: 2rem; }
  .ev-grid { grid-template-columns: 1fr; }
  .ev-card { padding: 32px 24px; }
  .csst-card { padding: 28px 20px; }
  .csst-stats-bar { grid-template-columns: 1fr; padding: 24px; }
  .csst-stat:not(:last-child)::after { display: none; }
}