:root {
  --ai-accent: #0f766e;
  --ai-accent-soft: rgba(15, 118, 110, 0.12);
  --ai-border: rgba(100, 116, 139, 0.22);
}

/* Keep all light-mode button treatments on the portfolio's green accent. */
body:not(.dark) {
  --primary-color: #0f766e;
}

body:not(.dark) .btn-outline-primary {
  --bs-btn-color: #0f766e;
  --bs-btn-border-color: #0f766e;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #0f766e;
  --bs-btn-hover-border-color: #0f766e;
  --bs-btn-focus-shadow-rgb: 15, 118, 110;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #0f766e;
  --bs-btn-active-border-color: #0f766e;
}

body:not(.dark) #projects .btn {
  color: #0f766e !important;
  border-color: #0f766e !important;
}

body:not(.dark) #projects .btn:hover {
  background-color: #0f766e !important;
  color: #fff !important;
}

.dark {
  --ai-accent: #5eead4;
  --ai-accent-soft: rgba(94, 234, 212, 0.1);
  --ai-border: rgba(203, 213, 225, 0.18);
}

#hero h2 { max-width: 850px; }
.focus-pills { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.5rem; }
.focus-pills span { padding: .4rem .75rem; border: 1px solid var(--ai-border); border-radius: 999px; background: var(--ai-accent-soft) !important; color: var(--text-color); font-size: .88rem; line-height: 1.2; }

#about .row { align-items: center; }
#about .about-profile { padding: 0 2rem; }
#about .about-portrait { position: relative; max-width: 330px; margin: 0 auto; }
#about .about-portrait::before { content: ""; position: absolute; inset: 14px -14px -14px 14px; border: 1px solid var(--ai-accent); border-radius: 1.5rem; opacity: .35; }
#about .about-portrait img { position: relative; z-index: 1; display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 1.5rem; box-shadow: 0 18px 50px rgba(15, 80, 100, .16); }
#about .about-status { display: flex; align-items: center; justify-content: center; gap: .55rem; max-width: 330px; margin: 2rem auto 0; color: var(--text-secondary-color); font-size: .84rem; }
#about .about-status span { width: .55rem; height: .55rem; border-radius: 50%; background: #22c55e !important; box-shadow: 0 0 0 4px rgba(34, 197, 94, .13); }

#about .about-story { padding: 1rem 2rem 1rem 3rem; }
#about .about-story p { margin-bottom: 1rem; line-height: 1.75; opacity: .82; }
#about .about-story .about-lead { color: var(--text-color); font-size: clamp(1.35rem, 2.5vw, 1.9rem); font-weight: 600; line-height: 1.38; letter-spacing: -.025em; opacity: 1; }
#about .about-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem; margin-top: 2rem; }
#about .about-facts div { padding: .85rem; border: 1px solid var(--ai-border); border-radius: .85rem; background: var(--secondary-color) !important; }
#about .about-facts small, #about .about-facts strong { display: block; }
#about .about-facts small { margin-bottom: .3rem; color: var(--text-secondary-color); font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; }
#about .about-facts strong { font-size: .88rem; }

#about .capabilities-block { margin-top: 4.5rem; padding: 0 2rem; }
#about .capabilities-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 1.5rem; }
#about .capabilities-heading span { color: var(--ai-accent); font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
#about .capabilities-heading h4 { margin: .2rem 0 0; font-size: clamp(1.65rem, 3vw, 2.25rem); }
#about .capabilities-heading p { max-width: 430px; margin: 0; color: var(--text-secondary-color); }

#about .skills-grid { display: grid !important; grid-template-columns: repeat(3, minmax(0, 1fr)) !important; gap: .85rem !important; margin: 0; padding: 0 !important; list-style: none !important; }
#about .skills-grid li { display: flex; flex-direction: column; min-height: 170px; margin: 0; padding: 1.25rem !important; border: 1px solid var(--ai-border); border-radius: 1rem; background: var(--secondary-color) !important; transition: transform .2s ease, box-shadow .2s ease; }
#about .skills-grid li:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(15, 80, 100, .1); }
#about .skills-grid li::before { display: none; }
#about .skill-number { color: var(--ai-accent); font-size: .72rem; font-weight: 700; }
#about .skills-grid strong { margin: .65rem 0 auto; font-size: 1.05rem; }
#about .skill-items { color: var(--text-secondary-color); font-size: .82rem; line-height: 1.55; }

.experience-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.experience-card, .education-card { padding: 1.5rem; background: var(--secondary-color) !important; border: 1px solid var(--ai-border); border-radius: 1rem; box-shadow: 0 8px 40px rgba(15, 80, 100, .1); }
.experience-card h4, .education-card h4 { margin: .35rem 0; }
#experience .experience-card .company,
#experience .experience-card .company a { color: var(--ai-accent) !important; font-weight: 600; }
.experience-card p, .education-card p { margin: 1rem 0; opacity: .86; }
.experience-card ul { padding-left: 1.1rem; margin-bottom: 0; }
.experience-card li { margin: .45rem 0; }
.experience-meta { font-size: .82rem; opacity: .7; letter-spacing: .02em; }
.education-card > span { float: right; font-size: .85rem; opacity: .72; }

#projects .project-link { display: inline-flex; align-items: center; gap: .4rem; }
#projects .card-img-top { aspect-ratio: 16 / 10; object-fit: cover; }
#achievements .card-img-top { width: 100%; height: 118px; object-fit: contain; }
#projects .card, #achievements .card { border: 1px solid var(--ai-border) !important; }
#achievements .achievement-card { max-width: 340px; margin-inline: auto; }
#achievements .achievement-card .card-body { padding: .8rem .65rem .65rem; }
#achievements .achievement-card .card-title { margin-bottom: .3rem; font-size: 1rem; line-height: 1.25; }
#achievements .achievement-card .card-text { margin-bottom: .45rem; font-size: .8rem; line-height: 1.45; }
#achievements .achievement-mark { display: grid; place-items: center; width: 3rem; height: 3rem; margin: .45rem 0 .35rem .45rem; border-radius: .75rem; background: var(--ai-accent-soft) !important; color: var(--ai-accent); font-size: 1.25rem; }
#achievements .achievement-issuer { margin-top: -.2rem; color: var(--ai-accent); font-weight: 600; }
#achievements .achievement-meta { display: flex; flex-wrap: wrap; gap: .25rem .75rem; margin: .5rem 0; color: var(--text-secondary-color); font-size: .72rem; }
#achievements .achievement-meta span { display: block; }
#achievements .credential-link { display: inline-flex; align-items: center; gap: .35rem; margin-top: .25rem; color: var(--ai-accent); font-size: .78rem; font-weight: 600; }

@media (max-width: 767px) {
  .experience-grid { grid-template-columns: 1fr; }
  #about .about-profile { padding: 0 1.5rem; }
  #about .about-story { padding: 3.5rem 1.5rem 0; }
  #about .about-facts { grid-template-columns: 1fr; }
  #about .capabilities-block { margin-top: 3.5rem; padding: 0 1.5rem; }
  #about .capabilities-heading { display: block; }
  #about .capabilities-heading p { margin-top: .75rem; }
  #about .skills-grid { grid-template-columns: 1fr !important; }
  #about .skills-grid li { min-height: 145px; }
  .education-card > span { float: none; display: block; margin-bottom: .5rem; }
}

@media (min-width: 768px) and (max-width: 991px) {
  #about .about-profile { max-width: 470px; margin: 0 auto; }
  #about .about-story { padding: 4rem 2rem 0; }
  #about .skills-grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
}