/* ===== AI ENGINEER ROADMAP 2026 - STYLESHEET ===== */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@700;900&family=Exo+2:wght@400;600;700;800&display=swap');

:root {
  --primary-blue:    rgb(30, 100, 180);
  --light-blue:      rgb(173, 216, 230);
  --sky:             rgb(100, 180, 240);
  --green:           rgb(34, 139, 34);
  --light-green:     rgb(144, 238, 144);
  --red:             rgb(200, 30, 30);
  --saffron:         rgb(255, 153, 51);
  --violet:          rgb(138, 43, 226);
  --light-violet:    rgb(216, 191, 216);
  --gold:            rgb(218, 165, 32);
  --teal:            rgb(0, 128, 128);
  --bg-dark:         rgb(10, 18, 38);
  --bg-card:         rgb(18, 32, 60);
  --bg-card2:        rgb(22, 42, 72);
  --border-glow:     rgb(100, 180, 240);
  --text-white:      rgb(240, 248, 255);
  --text-bright:     rgb(255, 255, 255);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Exo 2', sans-serif;
  background: var(--bg-dark);
  color: var(--text-white);
  font-weight: 700;
  overflow-x: hidden;
}

/* ===== HEADER ===== */
header {
  background: linear-gradient(135deg, rgb(10,18,38) 0%, rgb(20,60,120) 50%, rgb(10,18,38) 100%);
  border-bottom: 3px solid var(--saffron);
  padding: 30px 20px 20px;
  text-align: center;
  position: sticky; top: 0; z-index: 1000;
  box-shadow: 0 4px 20px rgba(100,180,240,0.4);
}
header h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.4rem, 4vw, 2.6rem);
  font-weight: 900;
  background: linear-gradient(90deg, var(--saffron), var(--sky), var(--light-green), var(--saffron));
  background-size: 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 4s linear infinite;
  letter-spacing: 2px;
}
header p {
  color: var(--light-blue);
  font-size: 0.95rem;
  margin-top: 6px;
  font-weight: 700;
}
@keyframes shimmer { 0%{background-position:0%} 100%{background-position:300%} }

/* ===== NAV BAR ===== */
#navbar {
  background: rgb(14, 26, 54);
  border-bottom: 2px solid var(--violet);
  padding: 10px 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  position: sticky; top: 90px; z-index: 999;
}
.nav-btn {
  background: linear-gradient(135deg, var(--primary-blue), var(--violet));
  color: var(--text-bright);
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-family: 'Exo 2', sans-serif;
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: 0.5px;
  transition: all 0.3s;
  border: 1px solid var(--sky);
}
.nav-btn:hover {
  background: linear-gradient(135deg, var(--saffron), var(--red));
  transform: scale(1.07);
  box-shadow: 0 0 14px var(--saffron);
}

/* ===== MAIN CONTENT ===== */
main { max-width: 1200px; margin: 0 auto; padding: 30px 15px 60px; }

/* ===== SECTION HEADINGS ===== */
.section-block { margin-bottom: 50px; }
.section-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 900;
  padding: 14px 24px;
  border-radius: 10px;
  margin-bottom: 18px;
  border-left: 6px solid;
  letter-spacing: 1px;
}
.sec-foundations  { background: linear-gradient(90deg, rgb(20,60,120), rgb(14,26,54)); border-color: var(--sky); color: var(--sky); }
.sec-datasci      { background: linear-gradient(90deg, rgb(10,60,30), rgb(14,26,54)); border-color: var(--light-green); color: var(--light-green); }
.sec-advancedai   { background: linear-gradient(90deg, rgb(80,20,120), rgb(14,26,54)); border-color: var(--violet); color: var(--light-violet); }
.sec-impl         { background: linear-gradient(90deg, rgb(120,60,10), rgb(14,26,54)); border-color: var(--saffron); color: var(--saffron); }
.sec-career       { background: linear-gradient(90deg, rgb(120,20,20), rgb(14,26,54)); border-color: var(--red); color: rgb(255,150,150); }
.sec-flow         { background: linear-gradient(90deg, rgb(0,80,80), rgb(14,26,54)); border-color: var(--teal); color: rgb(100,220,220); }
.sec-mindmap      { background: linear-gradient(90deg, rgb(60,60,10), rgb(14,26,54)); border-color: var(--gold); color: var(--gold); }
.sec-roadmap      { background: linear-gradient(90deg, rgb(20,80,60), rgb(14,26,54)); border-color: var(--green); color: var(--light-green); }

/* ===== SUB HEADINGS ===== */
.sub-title {
  font-size: 1.1rem;
  font-weight: 800;
  padding: 10px 18px;
  border-radius: 8px;
  margin: 18px 0 10px;
  border-left: 4px solid;
}
.sub-blue   { background: rgba(30,100,180,0.2); border-color: var(--sky);    color: var(--sky); }
.sub-green  { background: rgba(34,139,34,0.2);  border-color: var(--light-green); color: var(--light-green); }
.sub-violet { background: rgba(138,43,226,0.2); border-color: var(--violet); color: var(--light-violet); }
.sub-saffron{ background: rgba(255,153,51,0.2); border-color: var(--saffron);color: var(--saffron); }
.sub-red    { background: rgba(200,30,30,0.2);  border-color: var(--red);    color: rgb(255,150,150); }

/* ===== CARDS ===== */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 18px;
  border: 1.5px solid rgba(100,180,240,0.3);
  transition: transform 0.3s, box-shadow 0.3s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(100,180,240,0.3);
  border-color: var(--saffron);
}
.card h4 { font-size: 1rem; margin-bottom: 10px; }
.card-blue   { border-left: 4px solid var(--sky);    } .card-blue h4   { color: var(--sky); }
.card-green  { border-left: 4px solid var(--light-green); } .card-green h4  { color: var(--light-green); }
.card-violet { border-left: 4px solid var(--violet); } .card-violet h4 { color: var(--light-violet); }
.card-saffron{ border-left: 4px solid var(--saffron);} .card-saffron h4{ color: var(--saffron); }
.card-red    { border-left: 4px solid var(--red);    } .card-red h4    { color: rgb(255,150,150); }
.card-teal   { border-left: 4px solid var(--teal);   } .card-teal h4   { color: rgb(100,220,220); }

/* ===== BULLET LISTS ===== */
ul.bullet { list-style: none; padding: 0; }
ul.bullet li {
  padding: 6px 0 6px 22px;
  position: relative;
  color: var(--text-white);
  font-size: 0.93rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
ul.bullet li::before { content: '▸'; position: absolute; left: 4px; color: var(--saffron); }

/* ===== TABLES ===== */
.table-wrap { overflow-x: auto; margin: 16px 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th {
  background: linear-gradient(90deg, var(--primary-blue), var(--violet));
  color: var(--text-bright);
  padding: 10px 14px;
  text-align: left;
  font-weight: 800;
  border: 1px solid var(--sky);
}
td {
  padding: 9px 14px;
  border: 1px solid rgba(100,180,240,0.25);
  color: var(--text-white);
  font-weight: 700;
}
tr:nth-child(even) td { background: rgba(30,100,180,0.12); }
tr:hover td { background: rgba(255,153,51,0.1); }

/* ===== FLOWCHART ===== */
.flowchart-wrap { overflow-x: auto; padding: 20px 0; }
.flowchart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  min-width: 320px;
}
.fc-node {
  border-radius: 10px;
  padding: 12px 28px;
  text-align: center;
  font-weight: 800;
  font-size: 0.9rem;
  min-width: 240px;
  max-width: 360px;
  border: 2px solid;
  position: relative;
  z-index: 1;
}
.fc-start  { background: rgb(20,60,120); border-color: var(--sky);    color: var(--sky); border-radius:30px; }
.fc-blue   { background: rgb(15,45,90);  border-color: var(--sky);    color: var(--text-bright); }
.fc-green  { background: rgb(10,50,20);  border-color: var(--light-green); color: var(--light-green); }
.fc-violet { background: rgb(50,15,80);  border-color: var(--violet); color: var(--light-violet); }
.fc-saffron{ background: rgb(80,40,5);   border-color: var(--saffron);color: var(--saffron); }
.fc-red    { background: rgb(70,10,10);  border-color: var(--red);    color: rgb(255,180,180); }
.fc-teal   { background: rgb(0,50,50);   border-color: var(--teal);   color: rgb(100,220,220); }
.fc-end    { background: rgb(20,80,20);  border-color: var(--light-green); color: var(--light-green); border-radius:30px; }
.fc-arrow {
  width: 2px;
  height: 32px;
  background: linear-gradient(to bottom, var(--sky), var(--saffron));
  position: relative;
  margin: 0 auto;
}
.fc-arrow::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 50%;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 14px solid var(--saffron);
}

/* ===== MIND MAP ===== */
.mindmap-wrap { overflow-x: auto; padding: 20px 0; }
.mindmap-container {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  align-items: start;
  min-width: 700px;
}
.mm-center {
  background: linear-gradient(135deg, var(--primary-blue), var(--violet));
  color: var(--text-bright);
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 0.95rem;
  padding: 18px 14px;
  border-radius: 12px;
  text-align: center;
  border: 2px solid var(--saffron);
  box-shadow: 0 0 20px rgba(100,180,240,0.5);
  align-self: center;
}
.mm-branches { display: flex; flex-direction: column; gap: 12px; }
.mm-branch {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.mm-branch-label {
  min-width: 160px;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 800;
  font-size: 0.88rem;
  text-align: center;
  border: 2px solid;
  flex-shrink: 0;
}
.mm-leaves { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.mm-leaf {
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  border: 1.5px solid;
}
.mm-b1 { background: rgba(30,100,180,0.3); border-color: var(--sky); color: var(--sky); }
.mm-b2 { background: rgba(34,139,34,0.3);  border-color: var(--light-green); color: var(--light-green); }
.mm-b3 { background: rgba(138,43,226,0.3); border-color: var(--violet); color: var(--light-violet); }
.mm-b4 { background: rgba(255,153,51,0.3); border-color: var(--saffron); color: var(--saffron); }
.mm-b5 { background: rgba(200,30,30,0.3);  border-color: var(--red); color: rgb(255,150,150); }
.mm-l1 { background: rgba(30,100,180,0.15); border-color: var(--sky); color: var(--sky); }
.mm-l2 { background: rgba(34,139,34,0.15);  border-color: var(--light-green); color: var(--light-green); }
.mm-l3 { background: rgba(138,43,226,0.15); border-color: var(--violet); color: var(--light-violet); }
.mm-l4 { background: rgba(255,153,51,0.15); border-color: var(--saffron); color: var(--saffron); }
.mm-l5 { background: rgba(200,30,30,0.15);  border-color: var(--red); color: rgb(255,150,150); }
.mm-connector {
  width: 40px; height: 2px;
  background: linear-gradient(90deg, var(--sky), var(--saffron));
  align-self: center;
  flex-shrink: 0;
  position: relative;
}
.mm-connector::after {
  content:'';
  position: absolute;
  right: -1px; top: 50%;
  transform: translateY(-50%);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--saffron);
}

/* ===== ROADMAP ===== */
.roadmap-wrap { overflow-x: auto; }
.roadmap {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  min-width: 900px;
  padding: 20px 0;
  position: relative;
}
.roadmap::before {
  content:'';
  position: absolute;
  top: 80px; left: 5%; right: 5%;
  height: 4px;
  background: linear-gradient(90deg, var(--sky), var(--light-green), var(--violet), var(--saffron), var(--red));
  border-radius: 4px;
  z-index: 0;
}
.rm-phase {
  background: var(--bg-card2);
  border-radius: 12px;
  padding: 16px 12px;
  border: 2px solid;
  position: relative;
  z-index: 1;
  transition: transform 0.3s;
}
.rm-phase:hover { transform: translateY(-6px); }
.rm-phase-num {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1rem;
  margin: 0 auto 10px;
  border: 2px solid;
}
.rm-phase h4 {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.78rem;
  font-weight: 900;
  text-align: center;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}
.rm-phase ul { list-style: none; }
.rm-phase ul li {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 0 4px 16px;
  position: relative;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.rm-phase ul li::before { content:'→'; position:absolute; left:0; font-size:0.75rem; }
.rm-p1 { border-color: var(--sky); }    .rm-p1 h4,.rm-p1 .rm-phase-num{ color:var(--sky); } .rm-p1 .rm-phase-num{border-color:var(--sky);background:rgba(30,100,180,0.3);}  .rm-p1 li{ color:var(--text-white);} .rm-p1 li::before{color:var(--sky);}
.rm-p2 { border-color: var(--light-green); } .rm-p2 h4,.rm-p2 .rm-phase-num{ color:var(--light-green); } .rm-p2 .rm-phase-num{border-color:var(--light-green);background:rgba(34,139,34,0.3);} .rm-p2 li{ color:var(--text-white);} .rm-p2 li::before{color:var(--light-green);}
.rm-p3 { border-color: var(--violet); }  .rm-p3 h4,.rm-p3 .rm-phase-num{ color:var(--light-violet); } .rm-p3 .rm-phase-num{border-color:var(--violet);background:rgba(138,43,226,0.3);}  .rm-p3 li{ color:var(--text-white);} .rm-p3 li::before{color:var(--light-violet);}
.rm-p4 { border-color: var(--saffron); } .rm-p4 h4,.rm-p4 .rm-phase-num{ color:var(--saffron); }  .rm-p4 .rm-phase-num{border-color:var(--saffron);background:rgba(255,153,51,0.3);} .rm-p4 li{ color:var(--text-white);} .rm-p4 li::before{color:var(--saffron);}
.rm-p5 { border-color: var(--red); }     .rm-p5 h4,.rm-p5 .rm-phase-num{ color:rgb(255,150,150); }  .rm-p5 .rm-phase-num{border-color:var(--red);background:rgba(200,30,30,0.3);}   .rm-p5 li{ color:var(--text-white);} .rm-p5 li::before{color:rgb(255,150,150);}

/* ===== DISCLAIMER ===== */
.disclaimer {
  background: rgba(255,153,51,0.1);
  border: 2px solid var(--saffron);
  border-radius: 10px;
  padding: 14px 20px;
  margin: 30px 0;
  color: var(--saffron);
  font-weight: 800;
  font-size: 0.9rem;
  text-align: center;
}

/* ===== PRINT BUTTON ===== */
#print-btn {
  position: fixed;
  bottom: 30px; right: 30px;
  background: linear-gradient(135deg, var(--saffron), var(--red));
  color: var(--text-bright);
  border: none;
  padding: 14px 24px;
  border-radius: 30px;
  font-family: 'Exo 2', sans-serif;
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(255,153,51,0.5);
  z-index: 2000;
  transition: transform 0.3s, box-shadow 0.3s;
}
#print-btn:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(255,153,51,0.7); }

/* ===== PRINT MEDIA ===== */
@media print {
  header { position: static; }
  #navbar { position: static; }
  #print-btn { display: none; }
  body { background: #fff; color: #000; }
  .card, .rm-phase, .fc-node, .mm-branch-label, .mm-leaf { border-color: #333 !important; background: #f5f5f5 !important; color: #000 !important; }
  th { background: #333 !important; color: #fff !important; }
  .section-title, .sub-title { color: #000 !important; background: #e0e0e0 !important; }
  header h1 { -webkit-text-fill-color: #000; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .roadmap { grid-template-columns: 1fr 1fr; }
  .roadmap::before { display: none; }
  .mindmap-container { grid-template-columns: 1fr; }
}