/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1e3a5f;
  --primary-light: #2c5282;
  --accent: #3182ce;
  --accent-light: #ebf4ff;
  --bg: #f7f8fc;
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1), 0 12px 32px rgba(0,0,0,0.06);
  --max-width: 860px;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--gray-900);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Header ===== */
.header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: 40px 20px 36px;
  text-align: center;
}
.header-inner { max-width: var(--max-width); margin: 0 auto; }
.logo {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}
.subtitle {
  font-size: 15px;
  opacity: 0.85;
  font-weight: 400;
}

/* ===== Main ===== */
.main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* ===== Prompt Section ===== */
.prompt-section {
  margin-top: -24px;
  position: relative;
  z-index: 10;
}
.prompt-box {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 28px;
}
.prompt-label {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 14px;
}
.prompt-input-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.prompt-input-wrap textarea {
  width: 100%;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 15px;
  font-family: inherit;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 0.2s;
  color: var(--gray-900);
}
.prompt-input-wrap textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.prompt-input-wrap textarea::placeholder {
  color: var(--gray-300);
}

.btn-submit {
  align-self: flex-end;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-submit:hover { background: var(--primary-light); }
.btn-loading { display: inline-flex; align-items: center; gap: 8px; }

/* ===== Spinner ===== */
.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Examples ===== */
.examples-section {
  margin-top: 32px;
}
.section-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-700);
  margin-bottom: 16px;
}
.examples-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.example-chip {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  padding: 8px 18px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  color: var(--gray-700);
}
.example-chip:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--primary);
}
.chip-region {
  background: var(--primary);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 100px;
}
.chip-text {
  font-weight: 500;
}

/* ===== Loading ===== */
.loading-section {
  margin-top: 40px;
}
.loading-card {
  text-align: center;
  padding: 60px 20px;
}
.loading-spinner-large {
  width: 48px; height: 48px;
  border: 4px solid var(--gray-200);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}
.loading-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.loading-sub {
  font-size: 14px;
  color: var(--gray-500);
}

/* ===== Result Card ===== */
.result-section {
  margin-top: 36px;
  margin-bottom: 60px;
}
.result-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.result-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: 32px 32px 28px;
}
.result-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.result-title {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.3;
}

.result-body {
  padding: 32px;
}

/* Plan Blocks */
.plan-block {
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--gray-100);
}
.plan-block:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}
.plan-block-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.plan-block-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--accent);
  border-radius: 2px;
}
.plan-block p {
  font-size: 15px;
  color: var(--gray-700);
  line-height: 1.8;
}

/* Tags */
.tag-group { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  background: var(--accent-light);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
}

/* Programs */
.program-list { display: flex; flex-direction: column; gap: 14px; }
.program-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  transition: border-color 0.2s;
}
.program-item:hover {
  border-color: var(--accent);
}
.program-num {
  flex-shrink: 0;
  width: 44px; height: 44px;
  background: var(--accent);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  margin-top: 2px;
}
.program-content {
  min-width: 0;
  overflow-wrap: break-word;
  word-break: keep-all;
}
.program-content strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.program-content p {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 4px;
}
.program-meta {
  margin-top: 10px;
  margin-bottom: 0;
  font-size: 13px;
  color: var(--primary);
  background: var(--accent-light);
  display: inline-block;
  padding: 6px 14px;
  border-radius: 6px;
  line-height: 1.6;
}
.program-experience {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.experience-label {
  font-size: 12px;
  font-weight: 800;
  color: var(--white);
  background: #e85d75;
  padding: 4px 12px;
  border-radius: 100px;
}
.experience-tag {
  font-size: 13px;
  font-weight: 600;
  color: #b83b5e;
  background: #fef0f3;
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid #fcd4dc;
}

/* Trend Block */
.plan-block-trend {
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  border-bottom: none;
  margin-left: -8px;
  margin-right: -8px;
}
.plan-block-trend ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.plan-block-trend li {
  font-size: 14px;
  color: var(--gray-700);
  padding-left: 16px;
  position: relative;
}
.plan-block-trend li::before {
  content: '';
  position: absolute;
  left: 0; top: 10px;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* Trend Source */
.trend-source {
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
}

/* Similar Cases */
.similar-list { display: flex; flex-direction: column; gap: 12px; }
.similar-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--gray-50);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
}
.similar-region {
  flex-shrink: 0;
  background: var(--primary);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  margin-top: 2px;
}
.similar-item p {
  font-size: 14px;
  color: var(--gray-700);
  line-height: 1.6;
}
.similar-item strong {
  color: var(--gray-900);
}

/* Source Footer */
.result-footer {
  background: var(--gray-50);
  padding: 24px 32px;
  border-top: 1px solid var(--gray-200);
}
.source-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--gray-500);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.source-list { display: flex; flex-direction: column; gap: 6px; }
.source-item {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--gray-500);
}
.source-id {
  font-family: 'SF Mono', 'Consolas', monospace;
  background: var(--white);
  border: 1px solid var(--gray-200);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}
.source-name { font-weight: 600; color: var(--gray-700); }

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 24px 20px;
  font-size: 13px;
  color: var(--gray-500);
  border-top: 1px solid var(--gray-200);
  margin-top: auto;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .header { padding: 32px 16px 28px; }
  .logo { font-size: 22px; }
  .subtitle { font-size: 13px; }
  .prompt-box { padding: 20px; }
  .prompt-label { font-size: 15px; }
  .btn-submit { align-self: stretch; justify-content: center; }
  .examples-grid { gap: 8px; }
  .example-chip { font-size: 13px; padding: 6px 14px; }
  .result-header { padding: 24px 20px 20px; }
  .result-title { font-size: 20px; }
  .result-body { padding: 24px 20px; }
  .result-footer { padding: 20px; }
  .program-item { flex-direction: column; gap: 8px; padding: 16px; }
  .program-num { width: 30px; height: 30px; font-size: 12px; }
  .program-content { width: 100%; }
  .program-meta { display: block; word-break: keep-all; }
  .similar-item { flex-direction: column; gap: 8px; }
}