/* ================================================================
   JAWAD FAYAZ — Professional Academic Website
   Deep teal / green theme · Top navigation layout
   ================================================================ */

/* ── CSS Variables ─────────────────────────────────────────────── */
:root {
  --teal-dark:   #0a5c63;
  --teal-mid:    #127a82;
  --teal-light:  #1fa8b4;
  --teal-pale:   #e6f6f7;
  --teal-border: #b2dde0;
  --navy:        #0f2336;
  --text-dark:   #1c2b36;
  --text-mid:    #4a5e6a;
  --text-light:  #7a909a;
  --bg-white:    #ffffff;
  --bg-off:      #f4f8f9;
  --bg-alt:      #eaf4f5;
  --shadow-sm:   0 1px 4px rgba(10,92,99,0.08);
  --shadow-md:   0 6px 20px rgba(10,92,99,0.13);
  --radius:      0.5rem;
  --radius-lg:   0.85rem;
  --nav-h:       62px;
  --font:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ── Reset / Base ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-white);
  margin: 0;
  padding: 0 !important;   /* override resume.css padding */
}

a               { color: var(--teal-dark); text-decoration: none; }
a:hover         { color: var(--teal-mid); }
img             { max-width: 100%; }

/* ── TOP NAVIGATION ────────────────────────────────────────────── */
.topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--navy);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}

.topnav-brand {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: #fff;
  text-transform: uppercase;
  white-space: nowrap;
  margin-right: auto;
  flex-shrink: 0;
}
.topnav-brand a,
.topnav-brand a:hover { color: #fff; }

.topnav-links {
  list-style: none;
  display: flex;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}
.topnav-links a {
  display: block;
  color: rgba(255,255,255,0.75);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.4rem 0.6rem;
  border-radius: 0.3rem;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.topnav-links a:hover,
.topnav-links a.active {
  background: rgba(255,255,255,0.13);
  color: #fff;
}

.topnav-toggler {
  display: none;
  background: none;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: 0.3rem;
  color: #fff;
  font-size: 1.1rem;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  margin-left: 1rem;
  flex-shrink: 0;
}
.topnav-toggler:hover { background: rgba(255,255,255,0.1); }

@media (max-width: 860px) {
  .topnav-toggler { display: block; }
  .topnav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: 0.75rem 1.5rem 1.25rem;
    gap: 0.1rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 6px 16px rgba(0,0,0,0.25);
  }
  .topnav-links.open { display: flex; }
  .topnav-links a { padding: 0.55rem 0.5rem; font-size: 0.8rem; }
}

/* ── PAGE BODY ─────────────────────────────────────────────────── */
.page-body {
  padding-top: var(--nav-h);
  min-height: 100vh;
}

/* ── HERO ──────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(140deg, var(--navy) 0%, var(--teal-dark) 100%);
  color: #fff;
  padding: 4.5rem 2rem 3.5rem;
}
.hero-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2.5rem;
}
.hero-photo {
  flex-shrink: 0;
  width: 165px;
  height: 165px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255,255,255,0.25);
  box-shadow: 0 8px 28px rgba(0,0,0,0.35);
}
.hero-text h1 {
  font-size: 2.3rem;
  font-weight: 800;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.hero-title {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.85);
  margin: 0 0 0.25rem;
  font-weight: 400;
}
.hero-affil {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin: 0 0 1.6rem;
}
.hero-links {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}
.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.42rem 1rem;
  border-radius: 2rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1.5px solid rgba(255,255,255,0.45);
  color: rgba(255,255,255,0.9);
  transition: all 0.15s;
}
.hero-btn:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  color: #fff;
}
.hero-btn.primary {
  background: var(--teal-light);
  border-color: var(--teal-light);
  color: var(--navy);
  font-weight: 700;
}
.hero-btn.primary:hover {
  background: #fff;
  border-color: #fff;
  color: var(--teal-dark);
}

@media (max-width: 620px) {
  .hero-inner { flex-direction: column; text-align: center; gap: 1.5rem; }
  .hero-photo { width: 130px; height: 130px; }
  .hero-text h1 { font-size: 1.75rem; }
  .hero-links { justify-content: center; }
}

/* ── SECTION WRAPPERS ──────────────────────────────────────────── */
.section-wrapper { background: var(--bg-white); }
.section-wrapper-alt { background: var(--bg-off); }

.section {
  max-width: 980px;
  margin: 0 auto;
  padding: 3.5rem 2rem;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--teal-dark);
  letter-spacing: -0.01em;
  padding-bottom: 0.55rem;
  border-bottom: 3px solid var(--teal-light);
  display: inline-block;
  margin: 0 0 1.5rem;
}
.section-subtitle {
  font-size: 0.98rem;
  color: var(--text-mid);
  margin: -0.8rem 0 1.8rem;
}

/* ── ABOUT TEXT ────────────────────────────────────────────────── */
.about-text p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

/* ── RESEARCH TAGS ─────────────────────────────────────────────── */
.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}
.tag {
  background: var(--teal-pale);
  color: var(--teal-dark);
  border: 1px solid var(--teal-border);
  border-radius: 2rem;
  padding: 0.28rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* ── BIPARTITE RESEARCH LAYOUT ─────────────────────────────────── */
.bipartite {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: start;
  margin-top: 1.5rem;
}
.bipartite-col {
  background: var(--bg-white);
  border: 1px solid var(--teal-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-sm);
}
.bipartite-label {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.4rem 0.85rem;
  border-radius: 2rem;
  margin-bottom: 1.2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
}
.bipartite-label.methods-label {
  background: var(--teal-pale);
  color: var(--teal-dark);
  border: 1px solid var(--teal-border);
}
.bipartite-label.domains-label {
  background: rgba(15,35,54,0.07);
  color: var(--navy);
  border: 1px solid rgba(15,35,54,0.15);
}
.bipartite-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.bipartite-list li {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dark);
  padding: 0.5rem 0.8rem;
  background: var(--bg-off);
  border-radius: var(--radius);
  border-left: 3px solid var(--teal-light);
  line-height: 1.4;
}
.bipartite-col.domains .bipartite-list li {
  border-left: none;
  border-right: 3px solid var(--navy);
  text-align: right;
}
.bipartite-center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
  padding: 4.5rem 0.6rem 0;
  color: var(--teal-mid);
  font-size: 0.9rem;
}
.bipartite-center i { font-size: 1rem; opacity: 0.7; }

@media (max-width: 700px) {
  .bipartite { grid-template-columns: 1fr; }
  .bipartite-center { flex-direction: row; padding: 0.6rem 0; }
  .bipartite-col.domains .bipartite-list li {
    border-right: none;
    border-left: 3px solid var(--navy);
    text-align: left;
  }
}

/* ── LOGO BOXES (education + editorial) ───────────────────────── */
.logo-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 48px;
  background: var(--bg-off);
  border: 1px solid var(--teal-border);
  border-radius: var(--radius);
  flex-shrink: 0;
  overflow: hidden;
  padding: 6px;
}
.logo-box img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: grayscale(25%) opacity(0.82);
  transition: filter 0.2s;
}
.logo-box:hover img { filter: none; }

/* journal icon box (editorial service) */
.journal-icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--teal-pale);
  border: 1px solid var(--teal-border);
  border-radius: var(--radius);
  flex-shrink: 0;
  color: var(--teal-dark);
  font-size: 1.3rem;
}

/* Styled journal abbreviation "cover" badges */
.journal-abbrev {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  flex-shrink: 0;
  font-size: 0.52rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
  line-height: 1.35;
  padding: 5px;
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.journal-abbrev.ijdrr    { background: linear-gradient(145deg, #b5451b, #e05c2a); }
.journal-abbrev.frontiers{ background: linear-gradient(145deg, #c0572a, #e87845); }
.journal-abbrev.ssbe     { background: linear-gradient(145deg, #005f37, #00874f); }

/* ── RESEARCH CARDS ────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.1rem;
  margin-top: 1.5rem;
}
.card {
  background: var(--bg-white);
  border: 1px solid var(--teal-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--teal-mid);
}
.card-icon {
  font-size: 1.6rem;
  color: var(--teal-mid);
  margin-bottom: 0.75rem;
}
.card h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 0.5rem;
  text-transform: none;
  letter-spacing: 0;
}
.card p {
  font-size: 0.86rem;
  color: var(--text-mid);
  margin: 0;
  line-height: 1.65;
}

/* ── EDUCATION TIMELINE ────────────────────────────────────────── */
.timeline {
  position: relative;
  margin-top: 0.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 8px; bottom: 0;
  width: 2px;
  background: var(--teal-border);
}
.timeline-item {
  display: flex;
  gap: 1.4rem;
  margin-bottom: 2rem;
  position: relative;
}
.timeline-dot {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--teal-dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  z-index: 1;
  border: 3px solid var(--bg-off);
  box-shadow: 0 0 0 2px var(--teal-dark);
}
.timeline-body { padding-top: 0.2rem; }
.timeline-body h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 0.2rem;
}
.timeline-body .inst {
  font-size: 0.9rem;
  color: var(--text-mid);
  margin: 0;
}
.timeline-body .dates {
  font-size: 0.78rem;
  color: var(--teal-mid);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}
.timeline-body .inst {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.9rem;
  color: var(--text-mid);
  margin: 0;
}
.logo-box {
  display: inline-flex;
}

/* University logos in education timeline — no box, just the image */
.uni-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
  filter: grayscale(20%) opacity(0.75);
  transition: filter 0.2s;
  flex-shrink: 0;
}
.uni-logo:hover { filter: none; }

/* ── CONTACT ───────────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 1rem;
}
@media (max-width: 600px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info p {
  font-size: 0.96rem;
  color: var(--text-mid);
  line-height: 2.1;
  margin: 0;
}
.contact-info a { color: var(--teal-dark); font-weight: 500; }
.contact-info a:hover { text-decoration: underline; }

/* ── SOCIAL BUTTONS ────────────────────────────────────────────── */
.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.75rem;
}
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.38rem 0.9rem;
  border-radius: 2rem;
  font-size: 0.79rem;
  font-weight: 600;
  background: var(--teal-pale);
  color: var(--teal-dark);
  border: 1px solid var(--teal-border);
  transition: all 0.15s;
}
.social-btn:hover {
  background: var(--teal-dark);
  color: #fff;
  border-color: var(--teal-dark);
}

/* ── PAGE HEADER (inner pages) ─────────────────────────────────── */
.page-header {
  background: linear-gradient(140deg, var(--navy) 0%, var(--teal-dark) 100%);
  color: #fff;
  padding: 2.8rem 2rem 2.2rem;
  text-align: center;
}
.page-header h1 {
  font-size: 1.9rem;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.02em;
}
.page-header p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.68);
  margin: 0.45rem 0 0;
}

/* ── FOOTER ────────────────────────────────────────────────────── */
.site-footer {
  background: #fff;
  color: var(--text-light);
  border-top: 1px solid var(--teal-border);
  text-align: center;
  padding: 1.4rem 2rem;
  font-size: 0.78rem;
}
.site-footer a { color: var(--teal-mid); }
.site-footer a:hover { color: var(--teal-dark); }

/* ── LAYOUT PAGE CONTENT OVERRIDES ────────────────────────────── */
/* These styles adapt the old Bootstrap/resume structure to the new design */

.page-content {
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 2rem 3rem;
}

/* Override old inline-style heading colors and sizes */
.page-content h2 {
  font-size: 1.35rem !important;
  font-weight: 800 !important;
  color: var(--teal-dark) !important;
  border-bottom: 3px solid var(--teal-light);
  padding-bottom: 0.5rem;
  display: inline-block;
  margin-bottom: 1.5rem !important;
  font-family: var(--font) !important;
  text-transform: none !important;
}
.page-content h3 {
  font-size: 1.05rem !important;
  font-weight: 700 !important;
  color: var(--teal-dark) !important;
  margin-top: 2.5rem !important;
  margin-bottom: 1rem !important;
  font-family: var(--font) !important;
  text-transform: none !important;
  padding-bottom: 0 !important;
}
.page-content h4, .page-content h5 {
  font-family: var(--font) !important;
  text-transform: none !important;
  color: var(--text-dark) !important;
}
.page-content p,
.page-content li,
.page-content ol,
.page-content ul {
  color: var(--text-dark);
  font-size: 0.96rem;
  line-height: 1.75;
}

/* Remove old Bootstrap flex from resume-item */
.page-content .resume-item {
  display: block !important;
  margin-bottom: 2rem;
}
.page-content .resume-item .resume-date {
  min-width: unset !important;
  font-size: 0.85rem;
  color: var(--teal-mid);
  font-weight: 600;
}
.page-content .resume-item .resume-content { display: block; }
.page-content .resume-item .resume-image { float: left; margin: 0 1rem 0.5rem 0; }
.page-content .resume-item .resume-image img { height: 50px; width: auto; }

/* Sub-section headings for layout pages */
.page-content .mb-0[style],
.page-content h3.mb-0 {
  font-size: 1.05rem !important;
  color: var(--teal-dark) !important;
}

/* News / unordered list item links — pill style matching publication "See Article" */
.page-content ul li a {
  display: inline-block;
  font-size: 0.76rem !important;
  font-weight: 600;
  color: var(--teal-mid) !important;
  padding: 0.18rem 0.65rem;
  background: var(--teal-pale);
  border-radius: 2rem;
  border: 1px solid var(--teal-border);
  white-space: nowrap;
  margin-left: 0.3rem;
  vertical-align: middle;
  transition: background 0.15s, color 0.15s;
}
.page-content ul li a:hover {
  background: var(--teal-dark) !important;
  color: #fff !important;
  border-color: var(--teal-dark);
  text-decoration: none;
}

/* Bipartite domain sub-labels */
.domain-sub {
  display: block;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--text-light);
  margin-top: 0.15rem;
  letter-spacing: 0.01em;
}

/* Publication lists */
.page-content ol li {
  margin-bottom: 0.85rem;
  padding-left: 0.25rem;
  line-height: 1.75;
}
.page-content ol li b { color: var(--text-dark); }
.page-content ol li font { color: var(--teal-dark) !important; }
.page-content ol li i { color: var(--text-mid); }
.page-content ol li a {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--teal-mid);
  padding: 0.1rem 0.4rem;
  background: var(--teal-pale);
  border-radius: 0.2rem;
  border: 1px solid var(--teal-border);
}
.page-content ol li a:hover {
  background: var(--teal-dark);
  color: #fff;
}

/* Student photos — fixed square, no distortion */
.page-content .student-image {
  flex-shrink: 0 !important;
  width: 150px !important;
  height: 150px !important;
  overflow: hidden;
  border-radius: 0.5rem;
}
.page-content .student-image img,
.page-content .student-card img.img {
  width: 150px !important;
  height: 150px !important;
  object-fit: cover !important;
  object-position: center top !important;
  border-radius: 0.5rem;
  display: block;
}

/* University / institution logos in experience cards */
.page-content .logo-image {
  flex-shrink: 0 !important;
  width: 90px !important;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-content .student-card .logo-image img.img {
  width: 90px !important;
  height: 90px !important;
  object-fit: contain !important;
  object-position: center center !important;
  border-radius: 0 !important;
  display: block;
}

/* Card styling for flex rows */
.page-content .student-card,
.page-content .d-flex {
  display: flex !important;
  gap: 1.2rem;
  padding: 1.2rem 1.4rem;
  background: var(--bg-white);
  border: 1px solid var(--teal-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}
/* Default: team page cards start at top */
.page-content .student-card { align-items: flex-start; }
/* Experience items centred vertically via Bootstrap .align-items-center */
.page-content .d-flex:not(.align-items-center) { align-items: flex-start; }
.page-content .d-flex.align-items-center       { align-items: center !important; }
.page-content .student-card:hover,
.page-content .d-flex.resume-item:hover { box-shadow: var(--shadow-md); }

/* Image containers */
.page-content .image-div,
.page-content .image-div1,
.page-content .image-div2 {
  display: inline-block;
  overflow: hidden;
  border-radius: var(--radius);
  margin: 4px;
}

/* Text color overrides (inline styles) */
.page-content [style*="color:#003c3c"],
.page-content [style*="color: #003c3c"] { color: var(--teal-dark) !important; }
.page-content .text-primary { color: var(--teal-mid) !important; }

/* Hobbies section headings */
.hobbies-section-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--teal-dark);
  margin: 2.5rem 0 0.9rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--teal-border);
}
.hobbies-section-title:first-child { margin-top: 0.5rem; }

/* Quotes list */
.quotes-list {
  padding-left: 1.2rem;
}
.quotes-list li {
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* Gallery — responsive image grid */
.page-content .gallery {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 0.6rem;
  overflow: visible !important;
  margin: 1rem 0;
}
.page-content .gallery a {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-off);
  border: 1px solid var(--teal-border);
}
.page-content .gallery a img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
  padding: 0 !important;
  display: block;
  transition: transform 0.3s, filter 0.2s;
}
.page-content .gallery a:hover img {
  transform: scale(1.07);
  filter: brightness(1.06);
}