/* File: assets/css/style.css */
/* Action: Starsign16 Toolkit 단일 다크모드 공통 스타일 시트 */

:root {
  --bg-main: #0B0F17;
  --bg-card: #151D2A;
  --bg-input: #1C2638;
  --border-color: #26354A;
  --border-focus: #3B82F6;
  --text-main: #F3F4F6;
  --text-muted: #9CA3AF;
  --accent-gold: #F59E0B;
  --accent-blue: #3B82F6;
  --accent-green: #10B981;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* Header & Navigation */
header {
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
  margin-bottom: 32px;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  color: var(--accent-gold);
}

.lang-switch {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  transition: all 0.2s ease;
}

.lang-switch:hover {
  color: var(--text-main);
  border-color: var(--text-muted);
}

/* Cards & Grid */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 500;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 12px 14px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease;
}

input:focus,
select:focus {
  border-color: var(--border-focus);
}

/* Result Box */
.result-card {
  background-color: #0E1522;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 20px;
  margin-top: 20px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border-color);
}

.result-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.result-row.total {
  margin-top: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.result-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-green);
}

.result-row.total .result-value {
  font-size: 1.4rem;
  color: var(--accent-gold);
}

/* SEO Content & FAQ Accordion */
.seo-section {
  margin-top: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
}

.seo-section h2 {
  font-size: 1.25rem;
  margin-bottom: 16px;
  color: var(--text-main);
}

.seo-section p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.faq-question {
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.faq-answer {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Footer */
footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}