import React, { useRef, useState, useEffect } from "react";
import {
  ArrowDown,
  Check,
  Target,
  Layers,
  Calculator,
  BookOpen,
} from "lucide-react";
import InteractiveTransversal from "../../../components/lessons/InteractiveTransversal";
import InteractiveTriangle from "../../../components/lessons/InteractiveTriangle";
import PolygonWidget from "../../../components/lessons/PolygonWidget";
import Quiz from "../../../components/lessons/Quiz";
import { ANGLES_QUIZ_DATA } from "../../../utils/constants";
import { Frac } from "../../../components/Math";

interface LessonProps {
  onFinish?: () => void;
}

const LinesAnglesLesson: React.FC<LessonProps> = ({ onFinish }) => {
  const [activeSection, setActiveSection] = useState(0);
  const sectionsRef = useRef<(HTMLElement | null)[]>([]);

  const scrollToSection = (index: number) => {
    setActiveSection(index);
    sectionsRef.current[index]?.scrollIntoView({
      behavior: "smooth",
      block: "start",
    });
  };

  useEffect(() => {
    const observer = new IntersectionObserver(
      (entries) => {
        entries.forEach((entry) => {
          if (entry.isIntersecting) {
            const index = sectionsRef.current.indexOf(
              entry.target as HTMLElement,
            );
            if (index !== -1) setActiveSection(index);
          }
        });
      },
      { rootMargin: "-20% 0px -60% 0px" },
    );
    sectionsRef.current.forEach((section) => {
      if (section) observer.observe(section);
    });
    return () => observer.disconnect();
  }, []);

  const SectionMarker = ({
    index,
    title,
    icon: Icon,
  }: {
    index: number;
    title: string;
    icon: any;
  }) => {
    const isActive = activeSection === index;
    const isPast = activeSection > index;
    return (
      <button
        onClick={() => scrollToSection(index)}
        className={`flex items-center gap-3 p-3 w-full rounded-lg transition-all ${isActive ? "bg-white shadow-md border border-emerald-100" : "hover:bg-slate-100"}`}
      >
        <div
          className={`w-8 h-8 rounded-full flex items-center justify-center shrink-0 ${isActive ? "bg-emerald-600 text-white" : isPast ? "bg-emerald-400 text-white" : "bg-slate-200 text-slate-500"}`}
        >
          {isPast ? (
            <Check className="w-4 h-4" />
          ) : (
            <Icon className="w-4 h-4" />
          )}
        </div>
        <div className="text-left">
          <p
            className={`text-sm font-bold ${isActive ? "text-emerald-900" : "text-slate-600"}`}
          >
            {title}
          </p>
        </div>
      </button>
    );
  };

  return (
    <div className="flex flex-col lg:flex-row min-h-screen">
      <aside className="w-full lg:w-64 lg:fixed lg:top-20 lg:bottom-0 lg:overflow-y-auto p-4 border-r border-slate-200 bg-slate-50 lg:bg-transparent z-0 hidden lg:block">
        <nav className="space-y-2">
          <SectionMarker index={0} title="Parallel Lines" icon={Target} />
          <SectionMarker index={1} title="Triangles" icon={Layers} />
          <SectionMarker
            index={2}
            title="Special Triangles"
            icon={Calculator}
          />
          <SectionMarker index={3} title="Polygons" icon={Calculator} />
          <SectionMarker index={4} title="Practice" icon={BookOpen} />
        </nav>
      </aside>

      <div className="flex-1 lg:ml-64 p-6 md:p-12 max-w-4xl mx-auto">
        {/* Section 1: Parallel Lines */}
        <section
          ref={(el) => {
            sectionsRef.current[0] = el;
          }}
          className="min-h-screen flex flex-col justify-center mb-24 pt-20 lg:pt-0"
        >
          <h2 className="text-4xl font-extrabold text-slate-900 mb-6">
            Parallel Lines & Transversals
          </h2>
          <div className="prose prose-slate text-lg text-slate-600 mb-8">
            <p>
              When two parallel lines are cut by a transversal, 8 angles are
              formed. They fall into exactly two groups:{" "}
              <strong>equal angles</strong> and{" "}
              <strong>supplementary pairs</strong> (summing to 180°). Know one
              angle → find all eight.
            </p>
          </div>

          <div className="bg-emerald-50 border border-emerald-200 rounded-2xl p-6 mb-8 space-y-5">
            <h3 className="text-lg font-bold text-emerald-900">
              The 5 Angle-Pair Relationships
            </h3>

            <div className="overflow-x-auto rounded-xl border border-emerald-200">
              <table className="w-full text-sm border-collapse">
                <thead>
                  <tr className="bg-emerald-900 text-white">
                    <th className="p-3 text-left">Angle Pair</th>
                    <th className="p-3 text-left">Location</th>
                    <th className="p-3 text-left">Relationship</th>
                  </tr>
                </thead>
                <tbody className="divide-y divide-emerald-100">
                  <tr className="bg-emerald-50">
                    <td className="p-3 font-bold text-emerald-800">
                      Corresponding
                    </td>
                    <td className="p-3">
                      Same side, same position at each intersection
                    </td>
                    <td className="p-3 font-bold text-emerald-700">Equal</td>
                  </tr>
                  <tr className="bg-white">
                    <td className="p-3 font-bold text-emerald-800">
                      Alternate Interior
                    </td>
                    <td className="p-3">
                      Between the parallel lines, opposite sides
                    </td>
                    <td className="p-3 font-bold text-emerald-700">Equal</td>
                  </tr>
                  <tr className="bg-emerald-50">
                    <td className="p-3 font-bold text-emerald-800">
                      Alternate Exterior
                    </td>
                    <td className="p-3">
                      Outside the parallel lines, opposite sides
                    </td>
                    <td className="p-3 font-bold text-emerald-700">Equal</td>
                  </tr>
                  <tr className="bg-white">
                    <td className="p-3 font-bold text-slate-600">
                      Co-Interior (Same-Side)
                    </td>
                    <td className="p-3">
                      Between the lines, same side of transversal
                    </td>
                    <td className="p-3 font-bold text-rose-700">
                      Supplementary (sum = 180°)
                    </td>
                  </tr>
                  <tr className="bg-emerald-50">
                    <td className="p-3 font-bold text-slate-600">
                      Vertical Angles
                    </td>
                    <td className="p-3">
                      Opposite each other at an intersection
                    </td>
                    <td className="p-3 font-bold text-emerald-700">Equal</td>
                  </tr>
                </tbody>
              </table>
            </div>

            {/* Worked Example */}
            <div className="bg-white rounded-xl p-5 border border-emerald-100">
              <p className="font-bold text-emerald-800 mb-3">
                Worked Example: Find All 8 Angles
              </p>
              <p className="text-sm text-slate-700 mb-2">
                If one angle formed by a transversal cutting two parallel lines
                is 65°, find all other angles.
              </p>
              <div className="bg-emerald-50 rounded-lg p-4 text-sm font-mono text-slate-700 space-y-1">
                <p>
                  Angle 1 = <strong>65°</strong> (given)
                </p>
                <p>
                  Vertical angle = <strong>65°</strong> (vertical angles are
                  equal)
                </p>
                <p>
                  Corresponding angle = <strong>65°</strong> (corresponding
                  angles are equal)
                </p>
                <p>
                  Its vertical angle = <strong>65°</strong>
                </p>
                <p>
                  All four supplementary angles = 180° − 65° ={" "}
                  <strong>115°</strong>
                </p>
                <p className="mt-2 text-emerald-800 font-bold">
                  Result: four 65° angles and four 115° angles.
                </p>
              </div>
            </div>

            <div className="bg-sky-50 border border-sky-200 rounded-xl p-4 text-sm">
              <p className="font-bold text-sky-900 mb-1">
                SAT Strategy: Label with x and 180 − x
              </p>
              <p className="text-slate-700">
                When angles are expressed algebraically, label all equal angles
                as "x" and all supplementary angles as "180 − x." Then set equal
                or add to 180 to solve.
              </p>
              <div className="font-mono text-xs bg-white rounded p-2 mt-2 text-slate-700">
                <p>
                  Example: Corresponding angles → 3x + 15 = 2x + 45 → x = 30°
                </p>
              </div>
            </div>
          </div>

          <div className="mb-8">
            <InteractiveTransversal />
          </div>

          <button
            onClick={() => scrollToSection(1)}
            className="group flex items-center text-emerald-600 font-bold hover:text-emerald-800"
          >
            Next: Triangles{" "}
            <ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
          </button>
        </section>

        {/* Section 2: Triangles */}
        <section
          ref={(el) => {
            sectionsRef.current[1] = el;
          }}
          className="min-h-screen flex flex-col justify-center mb-24"
        >
          <h2 className="text-4xl font-extrabold text-slate-900 mb-6">
            Triangle Theorems
          </h2>
          <div className="prose prose-slate text-lg text-slate-600 mb-8">
            <p>
              Two essential theorems unlock almost every SAT triangle problem.
              The interactive tool below lets you drag vertices to verify both
              dynamically.
            </p>
          </div>

          <div className="bg-emerald-50 border border-emerald-200 rounded-2xl p-6 mb-8 space-y-5">
            <h3 className="text-lg font-bold text-emerald-900">
              Core Triangle Rules
            </h3>

            <div className="grid md:grid-cols-2 gap-4">
              <div className="bg-white rounded-xl p-5 border border-emerald-200">
                <p className="font-bold text-emerald-900 mb-1">
                  Triangle Sum Theorem
                </p>
                <div className="font-mono text-center bg-emerald-50 py-2 rounded text-emerald-700 font-bold mb-2">
                  ∠A + ∠B + ∠C = 180°
                </div>
                <p className="text-sm text-slate-700">
                  The three interior angles of any triangle always sum to
                  exactly 180°. No exceptions.
                </p>
              </div>
              <div className="bg-white rounded-xl p-5 border border-emerald-200">
                <p className="font-bold text-emerald-900 mb-1">
                  Exterior Angle Theorem
                </p>
                <div className="font-mono text-center bg-emerald-50 py-2 rounded text-emerald-700 font-bold mb-2">
                  ∠ext = ∠A + ∠B
                </div>
                <p className="text-sm text-slate-700">
                  An exterior angle equals the sum of the two non-adjacent
                  (remote) interior angles.
                </p>
              </div>
            </div>

            {/* Worked Examples */}
            <div className="bg-white rounded-xl p-5 border border-emerald-100">
              <p className="font-bold text-emerald-800 mb-3">Worked Examples</p>
              <div className="space-y-3">
                <div className="bg-emerald-50 rounded-lg p-4 text-sm">
                  <p className="font-semibold text-emerald-800 mb-1">
                    Example 1: Find a missing angle
                  </p>
                  <div className="font-mono text-xs text-slate-700 space-y-1">
                    <p>Two angles are 47° and 83°. Find the third.</p>
                    <p>
                      ∠C = 180° − 47° − 83° ={" "}
                      <strong className="text-emerald-700">50°</strong>
                    </p>
                  </div>
                </div>
                <div className="bg-emerald-50 rounded-lg p-4 text-sm">
                  <p className="font-semibold text-emerald-800 mb-1">
                    Example 2: Exterior angle
                  </p>
                  <div className="font-mono text-xs text-slate-700 space-y-1">
                    <p>
                      Two interior angles are 40° and 65°. Find the exterior
                      angle at the third vertex.
                    </p>
                    <p>
                      ∠ext = 40° + 65° ={" "}
                      <strong className="text-emerald-700">105°</strong>
                    </p>
                  </div>
                </div>
                <div className="bg-emerald-50 rounded-lg p-4 text-sm">
                  <p className="font-semibold text-emerald-800 mb-1">
                    Example 3: Isosceles triangle
                  </p>
                  <div className="font-mono text-xs text-slate-700 space-y-1">
                    <p>
                      An isosceles triangle has vertex angle = 40°. Find the
                      base angles.
                    </p>
                    <p>
                      Each base angle = <Frac n="180° − 40°" d="2" /> ={" "}
                      <Frac n="140°" d="2" /> ={" "}
                      <strong className="text-emerald-700">70°</strong>
                    </p>
                  </div>
                </div>
              </div>
            </div>

            {/* Triangle Inequality */}
            <div className="bg-sky-50 border border-sky-200 rounded-xl p-4 text-sm">
              <p className="font-bold text-sky-900 mb-1">
                Triangle Inequality Theorem
              </p>
              <p className="text-slate-700 mb-2">
                Any two sides of a triangle must sum to more than the third
                side.
              </p>
              <div className="font-mono text-xs bg-white rounded p-2 text-slate-700">
                <p>a + b &gt; c, a + c &gt; b, b + c &gt; a</p>
                <p className="mt-1">
                  Example: Can a triangle have sides 3, 5, 9?
                </p>
                <p>3 + 5 = 8 &lt; 9 → NO, not a valid triangle.</p>
              </div>
            </div>
          </div>

          <InteractiveTriangle />

          <button
            onClick={() => scrollToSection(2)}
            className="mt-8 group flex items-center text-emerald-600 font-bold hover:text-emerald-800"
          >
            Next: Special Triangles{" "}
            <ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
          </button>
        </section>

        {/* Section 3: Special Triangles */}
        <section
          ref={(el) => {
            sectionsRef.current[2] = el;
          }}
          className="min-h-screen flex flex-col justify-center mb-24"
        >
          <h2 className="text-4xl font-extrabold text-slate-900 mb-6">
            Special Right Triangles
          </h2>
          <div className="prose prose-slate text-lg text-slate-600 mb-8">
            <p>
              These two triangle types appear constantly on the SAT. Memorize
              their side ratios so you can find any missing side without using
              the Pythagorean theorem.
            </p>
          </div>

          <div className="bg-emerald-50 border border-emerald-200 rounded-2xl p-6 mb-8 space-y-5">
            <h3 className="text-lg font-bold text-emerald-900">
              The Two Special Right Triangles
            </h3>

            <div className="grid md:grid-cols-2 gap-4">
              <div className="bg-white rounded-xl p-5 border border-emerald-200">
                <p className="font-bold text-emerald-900 mb-2">
                  45° — 45° — 90°
                </p>
                <div className="font-mono text-center bg-emerald-50 py-3 rounded text-emerald-700 font-bold text-lg mb-2">
                  Sides: 1 : 1 : √2
                </div>
                <p className="text-sm text-slate-700 mb-2">
                  Two equal legs. Hypotenuse = leg × √2.
                </p>
                <div className="font-mono text-xs bg-slate-50 rounded p-2 text-slate-700">
                  <p>If leg = 5: hyp = 5√2</p>
                  <p>
                    If hyp = 8: leg = <Frac n="8" d="√2" /> = 4√2
                  </p>
                </div>
              </div>
              <div className="bg-white rounded-xl p-5 border border-emerald-200">
                <p className="font-bold text-emerald-900 mb-2">
                  30° — 60° — 90°
                </p>
                <div className="font-mono text-center bg-emerald-50 py-3 rounded text-emerald-700 font-bold text-lg mb-2">
                  Sides: 1 : √3 : 2
                </div>
                <p className="text-sm text-slate-700 mb-2">
                  Shortest leg opposite 30°. Hypotenuse = 2 × short leg.
                </p>
                <div className="font-mono text-xs bg-slate-50 rounded p-2 text-slate-700">
                  <p>Short leg = 4: long leg = 4√3, hyp = 8</p>
                  <p>Hyp = 10: short leg = 5, long leg = 5√3</p>
                </div>
              </div>
            </div>

            {/* Pythagorean Theorem */}
            <div className="bg-white rounded-xl p-5 border border-emerald-100">
              <p className="font-bold text-emerald-800 mb-3">
                Pythagorean Theorem & Common Triples
              </p>
              <div className="font-mono text-center bg-emerald-50 py-2 rounded text-emerald-700 font-bold text-lg mb-3">
                a² + b² = c²
              </div>
              <p className="text-sm text-slate-600 mb-3">
                c is always the hypotenuse (opposite the right angle). Memorize
                these Pythagorean triples — they appear frequently on the SAT:
              </p>
              <div className="overflow-x-auto rounded-xl border border-emerald-200">
                <table className="w-full text-sm border-collapse">
                  <thead>
                    <tr className="bg-emerald-900 text-white">
                      <th className="p-2 text-center">Triple (a, b, c)</th>
                      <th className="p-2 text-center">Scaled Version</th>
                      <th className="p-2 text-center">Verify</th>
                    </tr>
                  </thead>
                  <tbody className="divide-y divide-emerald-100">
                    <tr className="bg-white text-center">
                      <td className="p-2 font-bold">3, 4, 5</td>
                      <td className="p-2 text-slate-600">6-8-10, 9-12-15</td>
                      <td className="p-2 font-mono text-xs">9 + 16 = 25 ✓</td>
                    </tr>
                    <tr className="bg-emerald-50 text-center">
                      <td className="p-2 font-bold">5, 12, 13</td>
                      <td className="p-2 text-slate-600">10-24-26</td>
                      <td className="p-2 font-mono text-xs">
                        25 + 144 = 169 ✓
                      </td>
                    </tr>
                    <tr className="bg-white text-center">
                      <td className="p-2 font-bold">8, 15, 17</td>
                      <td className="p-2 text-slate-600">—</td>
                      <td className="p-2 font-mono text-xs">
                        64 + 225 = 289 ✓
                      </td>
                    </tr>
                    <tr className="bg-emerald-50 text-center">
                      <td className="p-2 font-bold">7, 24, 25</td>
                      <td className="p-2 text-slate-600">—</td>
                      <td className="p-2 font-mono text-xs">
                        49 + 576 = 625 ✓
                      </td>
                    </tr>
                  </tbody>
                </table>
              </div>
            </div>

            {/* Worked examples */}
            <div className="space-y-3">
              <div className="bg-sky-50 rounded-xl p-4 border border-sky-200 text-sm">
                <p className="font-semibold text-sky-800 mb-2">
                  Worked Example: 30-60-90
                </p>
                <div className="font-mono text-xs text-slate-700 space-y-1">
                  <p>
                    An equilateral triangle has side length 10. Find the height.
                  </p>
                  <p>The height bisects it into two 30-60-90 triangles.</p>
                  <p>Short leg (half the base) = 5</p>
                  <p>
                    Long leg (height) = 5√3 ≈{" "}
                    <strong className="text-sky-800">8.66</strong>
                  </p>
                </div>
              </div>
              <div className="bg-sky-50 rounded-xl p-4 border border-sky-200 text-sm">
                <p className="font-semibold text-sky-800 mb-2">
                  Worked Example: Pythagorean Triple
                </p>
                <div className="font-mono text-xs text-slate-700 space-y-1">
                  <p>
                    A right triangle has legs 9 and 12. Find the hypotenuse.
                  </p>
                  <p>Recognize: 9 and 12 are multiples of 3 and 4 (× 3).</p>
                  <p>
                    This is a 3-4-5 triple × 3: hypotenuse ={" "}
                    <strong className="text-sky-800">15</strong>
                  </p>
                </div>
              </div>
            </div>
          </div>

          <button
            onClick={() => scrollToSection(3)}
            className="group flex items-center text-emerald-600 font-bold hover:text-emerald-800"
          >
            Next: Polygons{" "}
            <ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
          </button>
        </section>

        {/* Section 4: Polygons */}
        <section
          ref={(el) => {
            sectionsRef.current[3] = el;
          }}
          className="min-h-screen flex flex-col justify-center mb-24"
        >
          <h2 className="text-4xl font-extrabold text-slate-900 mb-6">
            Polygons
          </h2>
          <div className="prose prose-slate text-lg text-slate-600 mb-8">
            <p>
              Polygon angle rules extend triangle logic — any polygon can be
              divided into triangles, which is where the interior angle sum
              formula comes from.
            </p>
          </div>

          <div className="bg-emerald-50 border border-emerald-200 rounded-2xl p-6 mb-8 space-y-5">
            <h3 className="text-lg font-bold text-emerald-900">
              Polygon Angle Formulas
            </h3>

            <div className="grid md:grid-cols-2 gap-4">
              <div className="bg-white rounded-xl p-5 border border-emerald-200">
                <p className="font-bold text-emerald-900 mb-1">
                  Interior Angle Sum
                </p>
                <div className="font-mono text-center bg-emerald-50 py-2 rounded text-emerald-700 font-bold mb-2">
                  (n − 2) × 180°
                </div>
                <p className="text-xs text-slate-600">
                  n = number of sides. Triangle: 180° | Quadrilateral: 360° |
                  Pentagon: 540° | Hexagon: 720°
                </p>
              </div>
              <div className="bg-white rounded-xl p-5 border border-emerald-200">
                <p className="font-bold text-emerald-900 mb-1">
                  Exterior Angle Sum
                </p>
                <div className="font-mono text-center bg-emerald-50 py-2 rounded text-emerald-700 font-bold mb-2">
                  Always = 360°
                </div>
                <p className="text-xs text-slate-600">
                  True for ALL convex polygons, regardless of n. Imagine walking
                  around the polygon — you turn a full circle.
                </p>
              </div>
            </div>

            {/* Reference table */}
            <div className="bg-white rounded-xl p-5 border border-emerald-100">
              <p className="font-bold text-emerald-800 mb-3">
                Quick Reference: Regular Polygons
              </p>
              <div className="overflow-x-auto rounded-xl border border-emerald-200">
                <table className="w-full text-sm border-collapse">
                  <thead>
                    <tr className="bg-emerald-900 text-white">
                      <th className="p-2 text-center">Polygon</th>
                      <th className="p-2 text-center">Sides (n)</th>
                      <th className="p-2 text-center">Interior Sum</th>
                      <th className="p-2 text-center">Each Interior Angle</th>
                    </tr>
                  </thead>
                  <tbody className="divide-y divide-emerald-100 text-center">
                    <tr className="bg-white">
                      <td className="p-2">Triangle</td>
                      <td className="p-2">3</td>
                      <td className="p-2">180°</td>
                      <td className="p-2">60°</td>
                    </tr>
                    <tr className="bg-emerald-50">
                      <td className="p-2">Quadrilateral</td>
                      <td className="p-2">4</td>
                      <td className="p-2">360°</td>
                      <td className="p-2">90°</td>
                    </tr>
                    <tr className="bg-white">
                      <td className="p-2">Pentagon</td>
                      <td className="p-2">5</td>
                      <td className="p-2">540°</td>
                      <td className="p-2">108°</td>
                    </tr>
                    <tr className="bg-emerald-50">
                      <td className="p-2">Hexagon</td>
                      <td className="p-2">6</td>
                      <td className="p-2">720°</td>
                      <td className="p-2">120°</td>
                    </tr>
                    <tr className="bg-white">
                      <td className="p-2">Octagon</td>
                      <td className="p-2">8</td>
                      <td className="p-2">1080°</td>
                      <td className="p-2">135°</td>
                    </tr>
                  </tbody>
                </table>
              </div>
            </div>

            {/* Formula for one angle */}
            <div className="bg-slate-50 border border-slate-200 rounded-xl p-4 text-sm">
              <p className="font-bold text-slate-800 mb-1">
                Each Interior Angle of a Regular n-gon
              </p>
              <div className="font-mono text-center bg-white py-2 rounded text-slate-700 font-bold mb-2">
                <Frac n="(n − 2) × 180°" d="n" />
              </div>
              <p className="text-slate-600 text-xs">
                Example: Regular hexagon → <Frac n="(6 − 2) × 180°" d="6" /> ={" "}
                <Frac n="720°" d="6" /> = <strong>120°</strong>
              </p>
              <p className="text-slate-600 text-xs mt-1">
                Example: Regular octagon → <Frac n="(8 − 2) × 180°" d="8" /> ={" "}
                <Frac n="1080°" d="8" /> = <strong>135°</strong>
              </p>
            </div>
          </div>

          <PolygonWidget />

          <button
            onClick={() => scrollToSection(4)}
            className="mt-12 group flex items-center text-emerald-600 font-bold hover:text-emerald-800"
          >
            Next: Practice{" "}
            <ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
          </button>
        </section>

        {/* Section 5: Quiz */}
        <section
          ref={(el) => {
            sectionsRef.current[4] = el;
          }}
          className="min-h-screen flex flex-col justify-center"
        >
          <div className="flex items-center gap-4 mb-8">
            <div className="p-3 bg-emerald-100 rounded-full">
              <BookOpen className="w-8 h-8 text-emerald-600" />
            </div>
            <h2 className="text-4xl font-extrabold text-slate-900">
              Practice Time
            </h2>
          </div>

          {ANGLES_QUIZ_DATA.map((quiz, idx) => (
            <div key={quiz.id} className="mb-12">
              <div className="flex items-center gap-2 mb-4">
                <span className="bg-slate-200 text-slate-600 text-xs font-bold px-2 py-1 rounded uppercase">
                  Question {idx + 1}
                </span>
              </div>
              <Quiz data={quiz} />
            </div>
          ))}

          <div className="p-8 bg-emerald-900 rounded-2xl text-white text-center mt-12">
            <h3 className="text-2xl font-bold mb-4">Topic Mastered!</h3>
            <button
              onClick={onFinish}
              className="px-6 py-3 bg-white text-emerald-900 font-bold rounded-full hover:bg-emerald-50 transition-colors"
            >
              Finish Lesson ✓
            </button>
          </div>
        </section>
      </div>
    </div>
  );
};

export default LinesAnglesLesson;
