/* ==================================================
   IMPROVE PAGE
================================================== */

.improve-wrapper {
  padding: 80px 20px 100px;
  max-width: 800px;
  margin: 0 auto;
}

.improve-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-md);
}

.improve-title {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 12px;
  text-align: center;
  color: var(--text);
}

.improve-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 40px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ==================================================
   TEXTAREA INPUT
================================================== */

.improve-textarea {
  width: 100%;
  min-height: 220px;
  padding: 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1.05rem;
  resize: vertical;
  margin-bottom: 20px;
  transition: var(--transition);
  font-family: inherit;
  color: var(--text);
}

.improve-textarea::placeholder {
  color: var(--text-light);
}

.improve-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.15);
  outline: none;
}

/* ==================================================
   IMPROVE BUTTON
================================================== */

.improve-btn {
  width: 100%;
  padding: 16px;
  background: var(--primary);
  color: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 20px;
  transition: var(--transition);
}

.improve-btn:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(17, 24, 39, 0.4);
}

.improve-btn:active {
  transform: translateY(0);
}

.improve-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ==================================================
   RESULT BOX
================================================== */

.result-box {
  margin-top: 30px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  display: none;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-box.show {
  display: block;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 16px;
}

.result-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
}

.copy-btn {
  padding: 8px 18px;
  background: var(--primary);
  color: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
}

.copy-btn:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-2px);
}

.copy-btn.copied {
  background: var(--success);
}

/* ==================================================
   RESULT TEXT
================================================== */

.result-text {
  white-space: pre-wrap;
  line-height: 1.7;
  font-size: 1.05rem;
  color: #334155;
  background: white;
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  word-break: break-word;
  overflow-wrap: break-word;
}

/* ==================================================
   LOADING STATE
================================================== */

.improve-loading {
  text-align: center;
  padding: 20px;
  color: var(--text-light);
}

.improve-loading::after {
  content: "";
  display: inline-block;
  width: 20px;
  height: 20px;
  margin-left: 10px;
  border: 3px solid var(--primary);
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ==================================================
   TIPS SECTION
================================================== */

.improve-tips {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.improve-tips h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: var(--text);
}

.improve-tips-list {
  list-style: none;
  padding: 0;
}

.improve-tips-list li {
  padding: 12px 0;
  color: var(--text-light);
  line-height: 1.6;
  display: flex;
  gap: 12px;
}

.improve-tips-list li::before {
  content: "→";
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* ==================================================
   RESPONSIVE DESIGN
================================================== */

@media (max-width: 768px) {
  .improve-wrapper {
    padding: 60px 20px 80px;
  }

  .improve-card {
    padding: 32px 24px;
    border-radius: var(--radius-md);
  }

  .improve-title {
    font-size: 1.8rem;
  }

  .improve-subtitle {
    font-size: 1rem;
    margin-bottom: 30px;
  }

  .improve-textarea {
    min-height: 180px;
    padding: 16px;
  }

  .result-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .copy-btn {
    width: 100%;
  }
}

@media (max-width: 576px) {
  .improve-wrapper {
    padding: 40px 16px 60px;
  }

  .improve-card {
    padding: 24px 16px;
  }

  .improve-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
  }

  .improve-subtitle {
    font-size: 0.95rem;
    margin-bottom: 24px;
  }

  .improve-textarea {
    min-height: 150px;
    padding: 12px;
    font-size: 1rem;
  }

  .improve-btn {
    padding: 14px;
    font-size: 1rem;
  }

  .result-box {
    padding: 20px;
  }

  .result-text {
    padding: 16px;
    font-size: 1rem;
  }

  .copy-btn {
    padding: 6px 14px;
    font-size: 0.9rem;
  }
}