public/lab7/task1/index.html - main - Cooolprogrammers/web-nodejs-labs

public/lab7/task1/index.html
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18 дек 2025, 07:59
18 дек 2025, 07:59f2c4f06
<!DOCTYPE html>
<html lang="ru">
<head>
  <meta charset="UTF-8">
  <title>Задание 1 — Калькулятор</title>
  <style>
    body {
      margin: 0;
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      background: linear-gradient(135deg, #0a0f0a, #121a12);
      font-family: 'Roboto Mono', 'Courier New', monospace;
    }

    .calculator {
      background: rgba(15, 25, 15, 0.95);
      border-radius: 20px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
      width: 360px;
      padding: 25px;
      display: flex;
      flex-direction: column;
      align-items: center;
      border: 2px solid rgba(0, 204, 102, 0.3);
    }

    .display {
      width: 100%;
      background: rgba(10, 15, 10, 0.9);
      color: #7aff7a;
      font-family: 'Roboto Mono', monospace;
      font-size: 2.4rem;
      text-align: right;
      border-radius: 12px;
      padding: 20px;
      margin-bottom: 25px;
      box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.5);
      border: 1px solid rgba(42, 74, 42, 0.8);
      text-shadow: 0 0 10px rgba(122, 255, 122, 0.4);
      letter-spacing: 2px;
      min-height: 80px;
      display: flex;
      align-items: center;
      justify-content: flex-end;
      overflow: hidden;
    }

    .buttons {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      width: 100%;
    }

    button {
      font-family: 'Roboto Mono', 'Courier New', monospace;
      font-size: 1.4rem;
      border: none;
      border-radius: 12px;
      padding: 20px 0;
      cursor: pointer;
      transition: all 0.2s ease;
      color: #0a0f0a;
      font-weight: 600;
      letter-spacing: 1px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    }

    button::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
      transition: left 0.5s;
    }

    button:hover::before {
      left: 100%;
    }

    button:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    }

    button:active {
      transform: translateY(0);
    }

    .btn-num { 
      background: linear-gradient(135deg, #2a4a2a, #1e3a1e); 
      color: #d0f0d0;
    }
    .btn-num:hover {
      background: linear-gradient(135deg, #3a5a3a, #2a4a2a);
    }
    
    .btn-op { 
      background: linear-gradient(135deg, #00cc66, #00994d); 
      color: #0a0f0a;
    }
    .btn-op:hover {
      background: linear-gradient(135deg, #00ff73, #00cc66);
    }
    
    .btn-clear { 
      background: linear-gradient(135deg, #ff4d4d, #cc0000); 
      color: #ffd0d0;
    }
    .btn-clear:hover {
      background: linear-gradient(135deg, #ff6666, #ff3333);
    }
    
    .btn-equal { 
      background: linear-gradient(135deg, #7aff7a, #00cc66); 
      color: #0a0f0a;
      grid-column: span 2; 
    }
    .btn-equal:hover {
      background: linear-gradient(135deg, #9aff9a, #00ff73);
    }

    h1 {
      color: #7aff7a;
      font-size: 1.3rem;
      margin-bottom: 15px;
      text-align: center;
      text-shadow: 0 0 10px rgba(122, 255, 122, 0.3);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      border-bottom: 2px solid rgba(0, 204, 102, 0.5);
      padding-bottom: 10px;
      width: 100%;
    }

    @media (max-width: 400px) {
      .calculator {
        width: 320px;
        padding: 20px;
      }
      
      .display {
        font-size: 2rem;
        padding: 15px;
      }
      
      button {
        font-size: 1.2rem;
        padding: 18px 0;
      }
      
      h1 {
        font-size: 1.1rem;
      }
    }
  </style>
</head>
<body>
  <div class="calculator">
    <h1>🧮 Лабораторная №7 — Калькулятор</h1>
    <div id="display" class="display">0</div>

    <div class="buttons">
      <button class="btn-num">7</button>
      <button class="btn-num">8</button>
      <button class="btn-num">9</button>
      <button class="btn-op" data-op="divide">÷</button>

      <button class="btn-num">4</button>
      <button class="btn-num">5</button>
      <button class="btn-num">6</button>
      <button class="btn-op" data-op="multiply">×</button>

      <button class="btn-num">1</button>
      <button class="btn-num">2</button>
      <button class="btn-num">3</button>
      <button class="btn-op" data-op="subtract">−</button>

      <button class="btn-num">0</button>
      <button class="btn-clear">C</button>
      <button class="btn-equal">=</button>
      <button class="btn-op" data-op="add">+</button>
    </div>
  </div>

  <script>
    const display = document.getElementById('display');
    let current = '';
    let a = null;
    let op = null;

    function updateDisplay(value) {
      display.textContent = value.toString().substring(0, 14);
    }

    document.querySelectorAll('.btn-num').forEach(btn => {
      btn.addEventListener('click', () => {
        current += btn.textContent;
        updateDisplay(current);
      });
    });

    document.querySelectorAll('.btn-op').forEach(btn => {
      btn.addEventListener('click', () => {
        if (current === '') return;
        a = current;
        op = btn.dataset.op;
        current = '';
        updateDisplay(btn.textContent);
      });
    });

    document.querySelector('.btn-clear').addEventListener('click', () => {
      current = '';
      a = null;
      op = null;
      updateDisplay(0);
    });

    document.querySelector('.btn-equal').addEventListener('click', async () => {
      if (a === null || current === '' || !op) return;

      try {
        const res = await fetch(`/api/lab7/task1/calc?a=${a}&b=${current}&operation=${op}`);
        const data = await res.json();
        if (data.error) {
          display.style.color = '#ff7a7a';
          display.textContent = 'ERR';
          setTimeout(() => {
            display.style.color = '#7aff7a';
            updateDisplay(0);
          }, 1000);
        } else {
          current = data.result.toString();
          updateDisplay(current);
          a = null;
          op = null;
        }
      } catch {
        display.style.color = '#ff7a7a';
        display.textContent = 'ERR';
        setTimeout(() => {
          display.style.color = '#7aff7a';
          updateDisplay(0);
        }, 1000);
      }
    });
  </script>
</body>
</html>