/* ===== PYTHON LEARNING ROADMAP - STYLESHEET ===== */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&family=Fira+Code:wght@600&display=swap');

:root {
  --blue:    rgb(30, 100, 200);
  --lblue:   rgb(180, 220, 255);
  --green:   rgb(20, 150, 80);
  --lgreen:  rgb(200, 245, 220);
  --red:     rgb(200, 40, 40);
  --saffron: rgb(255, 153, 51);
  --violet:  rgb(120, 50, 200);
  --lviolet: rgb(230, 210, 255);
  --gold:    rgb(255, 200, 0);
  --bg:      rgb(240, 248, 255);
  --white:   #ffffff;
  --dark:    rgb(15, 25, 50);
  --border:  rgb(30, 100, 200);
  --shadow:  rgba(30,100,200,0.18);
}

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

body {
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
  background: linear-gradient(135deg, rgb(220,240,255) 0%, rgb(230,255,240) 50%, rgb(255,240,220) 100%);
  color: var(--dark);
  min-height: 100vh;
}

/* ---- HEADER ---- */
header {
  background: linear-gradient(90deg, rgb(20,60,160), rgb(20,140,80), rgb(180,80,0));
  color: #fff;
  text-align: center;
  padding: 30px 20px 18px;
  border-bottom: 6px solid var(--saffron);
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}
header h1 {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: 2px;
  text-shadow: 2px 2px 8px rgba(0,0,0,0.4);
}
header p {
  font-size: 1.1rem;
  margin-top: 6px;
  color: rgb(255,230,180);
  font-weight: 800;
}

/* ---- NAV BUTTONS ---- */
#nav-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  background: rgb(15,30,80);
  padding: 14px 10px;
  border-bottom: 4px solid var(--saffron);
  position: sticky;
  top: 0;
  z-index: 999;
}
.nav-btn {
  background: linear-gradient(135deg, var(--saffron), rgb(220,100,0));
  color: #fff;
  border: 2px solid #fff;
  border-radius: 30px;
  padding: 8px 18px;
  font-family: 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.25s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.nav-btn:hover {
  background: linear-gradient(135deg, var(--green), var(--blue));
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
#print-btn {
  background: linear-gradient(135deg, rgb(180,0,100), rgb(100,0,180));
  font-size: 0.95rem;
  padding: 9px 24px;
}

/* ---- MAIN CONTAINER ---- */
main { max-width: 1200px; margin: 0 auto; padding: 30px 18px 60px; }

/* ---- SECTION ---- */
.section {
  margin-bottom: 50px;
  border-radius: 18px;
  border: 3px solid var(--border);
  box-shadow: 0 6px 30px var(--shadow);
  overflow: hidden;
  background: #fff;
}
.section-header {
  padding: 18px 28px;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 1px;
  color: #fff;
  border-bottom: 4px solid rgba(255,255,255,0.3);
}
.s1 .section-header { background: linear-gradient(90deg, rgb(20,80,180), rgb(0,160,100)); }
.s2 .section-header { background: linear-gradient(90deg, rgb(180,60,0), rgb(200,130,0)); }
.s3 .section-header { background: linear-gradient(90deg, rgb(100,0,180), rgb(180,0,100)); }
.s-flowchart .section-header { background: linear-gradient(90deg, rgb(0,120,80), rgb(0,180,120)); }
.s-mindmap  .section-header  { background: linear-gradient(90deg, rgb(20,60,160), rgb(100,0,180)); }
.s-roadmap  .section-header  { background: linear-gradient(90deg, rgb(180,80,0), rgb(200,150,0)); }

.section-body { padding: 24px 28px; }

/* ---- SUBSECTION ---- */
.subsection {
  margin: 22px 0;
  border-left: 5px solid var(--blue);
  padding-left: 16px;
}
.subsection h3 {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--blue);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.subsection.green  { border-left-color: var(--green); }
.subsection.green h3 { color: var(--green); }
.subsection.red    { border-left-color: var(--red); }
.subsection.red h3 { color: var(--red); }
.subsection.saffron { border-left-color: var(--saffron); }
.subsection.saffron h3 { color: rgb(180,90,0); }
.subsection.violet { border-left-color: var(--violet); }
.subsection.violet h3 { color: var(--violet); }

ul.point-list { list-style: none; padding: 0; }
ul.point-list li {
  background: linear-gradient(90deg, var(--lblue), var(--lgreen));
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  margin: 7px 0;
  padding: 10px 16px;
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--dark);
}
ul.point-list li strong { color: var(--blue); }
ul.point-list.green li { background: linear-gradient(90deg, var(--lgreen), rgb(255,250,200)); border-left-color: var(--green); }
ul.point-list.green li strong { color: var(--green); }
ul.point-list.saffron li { background: linear-gradient(90deg, rgb(255,240,200), rgb(255,250,230)); border-left-color: var(--saffron); }
ul.point-list.saffron li strong { color: rgb(160,70,0); }
ul.point-list.violet li { background: linear-gradient(90deg, var(--lviolet), rgb(220,240,255)); border-left-color: var(--violet); }
ul.point-list.violet li strong { color: var(--violet); }

/* ---- TABLE ---- */
.table-wrap { overflow-x: auto; margin: 18px 0; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
  font-weight: 700;
}
table caption {
  font-size: 1.05rem;
  font-weight: 900;
  padding: 8px;
  color: var(--blue);
  text-align: left;
  caption-side: top;
}
thead tr {
  background: linear-gradient(90deg, rgb(20,80,180), rgb(0,160,100));
  color: #fff;
}
thead th {
  padding: 12px 14px;
  text-align: left;
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  border: 2px solid rgba(255,255,255,0.3);
}
tbody tr:nth-child(odd)  { background: rgb(235,248,255); }
tbody tr:nth-child(even) { background: rgb(225,255,240); }
tbody tr:hover { background: rgb(255,245,200); transition: 0.2s; }
tbody td {
  padding: 10px 14px;
  border: 1.5px solid rgb(180,210,240);
  color: var(--dark);
}

/* ---- CODE BLOCK ---- */
.code-ex {
  background: rgb(20,30,60);
  color: rgb(100,255,180);
  font-family: 'Fira Code', monospace;
  font-size: 0.88rem;
  border-radius: 10px;
  padding: 14px 18px;
  margin: 12px 0;
  border-left: 5px solid var(--saffron);
  overflow-x: auto;
  line-height: 1.7;
}

/* ---- FLOWCHART ---- */
#flowchart-svg { width: 100%; height: auto; display: block; }

/* ---- MIND MAP ---- */
#mindmap-svg { width: 100%; height: auto; display: block; }

/* ---- ROADMAP ---- */
.roadmap-wrap { position: relative; padding: 10px 0; }
.rm-stage {
  display: flex;
  align-items: flex-start;
  margin: 0 0 0 0;
  position: relative;
}
.rm-connector {
  width: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 6px;
}
.rm-dot {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--saffron);
  border: 3px solid var(--dark);
  flex-shrink: 0;
  z-index:2;
}
.rm-line {
  width: 4px;
  flex: 1;
  min-height: 40px;
  background: linear-gradient(var(--blue), var(--green));
}
.rm-card {
  flex: 1;
  margin: 6px 0 6px 12px;
  border-radius: 14px;
  padding: 16px 20px;
  border: 2.5px solid var(--border);
  box-shadow: 0 3px 14px var(--shadow);
}
.rm-card h4 { font-size: 1.1rem; font-weight: 900; margin-bottom: 8px; }
.rm-card ul { padding-left: 18px; font-size: 0.93rem; }
.rm-card ul li { margin: 4px 0; }
.rm-s1 { background: linear-gradient(120deg, rgb(220,240,255), rgb(200,255,230)); border-color: var(--blue); }
.rm-s1 h4 { color: var(--blue); }
.rm-s2 { background: linear-gradient(120deg, rgb(255,240,210), rgb(255,255,200)); border-color: var(--saffron); }
.rm-s2 h4 { color: rgb(160,80,0); }
.rm-s3 { background: linear-gradient(120deg, var(--lviolet), rgb(220,255,240)); border-color: var(--violet); }
.rm-s3 h4 { color: var(--violet); }
.rm-s4 { background: linear-gradient(120deg, rgb(255,220,220), rgb(255,245,200)); border-color: var(--red); }
.rm-s4 h4 { color: var(--red); }

/* ---- DISCLAIMER ---- */
.disclaimer {
  background: linear-gradient(90deg, rgb(255,245,210), rgb(220,255,235));
  border: 3px solid var(--saffron);
  border-radius: 12px;
  padding: 16px 22px;
  margin: 30px 0 10px;
  font-size: 0.95rem;
  font-weight: 800;
  color: rgb(120,60,0);
  text-align: center;
}

/* ---- PRINT ---- */
@media print {
  #nav-bar, #print-btn { display: none !important; }
  .section { break-inside: avoid; }
  body { background: #fff; }
}