:root {
  --color-primary-dark: #2a3f6f;
  --color-primary-light: #4e78c2;
  --color-background: #f4f6f9;
  --color-card-bg: #ffffff;
  --color-text-dark: #1f2937;
  --color-text-medium: #4b5563;
  --color-success-bg: #e6fff7;
  --color-success-text: #047857;
  --color-danger-bg: #fff0f0;
  --color-danger-text: #b91c1c;
}

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&display=swap");

body {
  font-family: "Inter", sans-serif;
  margin: 0;
  padding: 20px;
  background-color: var(--color-background);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 700px;
  margin-top: 40px;
  background: var(--color-card-bg);
  padding: 35px 40px;
  border-radius: 10px;
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
  border-top: 5px solid var(--color-primary-dark);
}

.header {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  margin-bottom: 25px;
  text-align: center;
}

.logo {
  width: 120px;
  height: 120px;
  margin-bottom: 15px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-primary-light);
}

h1 {
  color: var(--color-primary-dark);
  font-size: 2.2rem;
  font-weight: 800;
  margin: 0;
}

p.subtitle {
  font-size: 1rem;
  color: var(--color-text-medium);
  margin-top: 5px;
  font-weight: 400;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 10px;
  color: var(--color-text-dark);
  font-size: 0.95rem;
}

textarea {
  width: 100%;
  padding: 18px;
  margin-bottom: 25px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  box-sizing: border-box;
  resize: vertical;
  font-size: 1rem;
  min-height: 120px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

textarea:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(78, 120, 194, 0.2);
  outline: none;
}

input[type="submit"] {
  width: 100%;
  background-color: var(--color-primary-dark);
  color: white;
  padding: 14px 15px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: background-color 0.3s ease, transform 0.1s;
}

input[type="submit"]:hover {
  background-color: var(--color-primary-light);
}

input[type="submit"]:active {
  transform: translateY(1px);
}

.result {
  margin-top: 35px;
  padding: 25px;
  border-radius: 8px;
  text-align: center;
  font-weight: 700;
  border: 1px solid;
}

.result h2 {
  margin-top: 0;
  font-size: 1rem;
  color: var(--color-text-dark);
  font-weight: 600;
  text-transform: uppercase;
}

.result p {
  font-size: 3rem;
  margin: 10px 0 15px;
  font-weight: 800;
  letter-spacing: 1px;
}

.positive-result {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
  border-color: #34d399;
}

.negative-result {
  background-color: var(--color-danger-bg);
  color: var(--color-danger-text);
  border-color: #f87171;
}

.input-text {
  font-style: italic;
  color: var(--color-text-medium);
  font-size: 0.9rem;
  margin-top: 15px;
}

@media (max-width: 768px) {
  .container {
    margin-top: 20px;
    padding: 25px;
  }
  h1 {
    font-size: 1.8rem;
  }
  .result p {
    font-size: 2.5rem;
  }
}