// @task S3F8
/* ============================================================
   learning.css — Learning 페이지 전용 스타일
   My Chatbot World | S3F8
   ============================================================ */

/* ── 베이스 리셋 & 공통 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', '맑은 고딕', sans-serif;
  background: #0d0d12;
  color: #e2e8f0;
  min-height: 100vh;
}

/* ── 레이아웃 ── */
.page-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: #16161c;
  border-right: 1px solid rgba(255,255,255,0.06);
  padding: 2rem 1.25rem;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 100;
}

.sidebar-brand {
  font-size: 1rem; font-weight: 800;
  color: var(--primary-400, #818cf8);
  margin-bottom: 1.5rem;
  text-decoration: none; display: block;
}

.sidebar-section-label {
  font-size: 0.7rem; font-weight: 600;
  color: rgba(255,255,255,0.3);
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 0.75rem 0.5rem 0.25rem; margin-top: 0.5rem;
}

.sidebar-link {
  display: flex; align-items: center; gap: 0.625rem;
  padding: 0.625rem 0.75rem; border-radius: 8px;
  color: rgba(255,255,255,0.55); font-size: 0.875rem; font-weight: 500;
  text-decoration: none; transition: all 0.15s;
}
.sidebar-link:hover { background: rgba(255,255,255,0.05); color: white; }
.sidebar-link.active { background: #059669; color: white; }
.sidebar-link .icon { font-size: 1rem; width: 1.25rem; text-align: center; }
.sidebar-link.top-level {
  font-size: 0.925rem; font-weight: 700;
  color: rgba(255,255,255,0.8); padding: 0.75rem 0.75rem;
}
.sidebar-link.top-level.current { color: #34d399; }

.main-content {
  flex: 1;
  margin-left: 240px;
  padding: 3rem 3.5rem;
  max-width: calc(100% - 240px);
}

/* ── 페이지 헤더 ── */
.page-header { margin-bottom: 2.5rem; }

.page-badge {
  display: inline-block;
  background: rgba(16,185,129,0.12);
  color: #34d399;
  border: 1px solid rgba(16,185,129,0.25);
  padding: 0.25rem 0.75rem; border-radius: 999px;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 0.75rem;
}

.page-title {
  font-size: 2.25rem; font-weight: 900; color: #ffffff;
  line-height: 1.2; margin-bottom: 0.75rem;
}
.page-title .title-ko { color: #34d399; }
.page-subtitle {
  font-size: 1.05rem; color: rgba(255,255,255,0.55); line-height: 1.7;
}

/* ── 공통 버튼 ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.5rem; border-radius: 10px;
  font-size: 0.925rem; font-weight: 600; text-decoration: none;
  cursor: pointer; transition: all 0.15s; border: none;
}
/* Remove outline only for pointer/mouse focus; keep it for keyboard navigation */
.btn:focus:not(:focus-visible) { outline: none; }
.btn-primary { background: #059669; color: white; }
.btn-primary:hover { background: #047857; transform: translateY(-1px); }
.btn-secondary {
  background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.1);
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.8rem; }
.btn-outline-green {
  background: transparent;
  color: #34d399;
  border: 1px solid rgba(52,211,153,0.4);
}
.btn-outline-green:hover {
  background: rgba(52,211,153,0.1);
  border-color: #34d399;
}

/* ── 사용자 상태 배너 ── */
.user-banner {
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}
.user-banner-info { display: flex; align-items: center; gap: 0.75rem; }
.user-avatar {
  width: 2.25rem; height: 2.25rem; border-radius: 50%;
  background: linear-gradient(135deg, #059669, #34d399);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.875rem; font-weight: 700; color: white;
  flex-shrink: 0;
}
.user-name { font-size: 0.925rem; font-weight: 600; color: white; }
.user-level { font-size: 0.775rem; color: #34d399; }
.user-xp { font-size: 0.8rem; color: rgba(255,255,255,0.5); }

/* ── 전체 진행 상황 요약 카드 ── */
.progress-summary {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1rem; margin-bottom: 2.5rem;
}

.summary-card {
  background: #1c1c24;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px; padding: 1.25rem;
  text-align: center;
}
.summary-value {
  font-size: 1.75rem; font-weight: 900; color: #34d399;
  line-height: 1; margin-bottom: 0.4rem;
}
.summary-label { font-size: 0.8rem; color: rgba(255,255,255,0.45); }

/* ── 섹션 타이틀 ── */
.section-title {
  font-size: 1.1rem; font-weight: 700; color: white;
  margin-bottom: 1.25rem;
  display: flex; align-items: center; gap: 0.5rem;
}

/* ──────────────────────────────────────────────
   커리큘럼 카드 (index.html — 4단계 그리드)
   ────────────────────────────────────────────── */
.curriculum-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem; margin-bottom: 2.5rem;
}

.curriculum-card {
  background: #1c1c24;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 16px; padding: 1.75rem;
  text-decoration: none; color: inherit;
  transition: all 0.2s; cursor: pointer;
  display: flex; flex-direction: column; gap: 1rem;
  position: relative; overflow: hidden;
}
.curriculum-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #059669, #34d399);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s;
}
.curriculum-card:hover::before { transform: scaleX(1); }
.curriculum-card:hover {
  border-color: rgba(16,185,129,0.35);
  background: #22222e;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16,185,129,0.08);
}
.curriculum-card.completed {
  border-color: rgba(16,185,129,0.3);
}
.curriculum-card.locked {
  opacity: 0.55; cursor: not-allowed;
}
.curriculum-card.locked:hover { transform: none; box-shadow: none; }

.card-header {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 0.75rem;
}
.card-icon {
  font-size: 2rem; line-height: 1;
  width: 3rem; height: 3rem;
  background: rgba(16,185,129,0.1);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.card-badge {
  display: inline-flex; align-items: center;
  font-size: 0.7rem; font-weight: 600; padding: 0.2rem 0.6rem;
  border-radius: 999px;
}
.badge-active {
  background: rgba(16,185,129,0.15); color: #34d399;
  border: 1px solid rgba(16,185,129,0.3);
}
.badge-completed {
  background: rgba(99,102,241,0.15); color: #818cf8;
  border: 1px solid rgba(99,102,241,0.3);
}
.badge-locked {
  background: rgba(255,255,255,0.05); color: rgba(255,255,255,0.3);
  border: 1px solid rgba(255,255,255,0.1);
}
.badge-upcoming {
  background: rgba(245,158,11,0.1); color: #fbbf24;
  border: 1px solid rgba(245,158,11,0.25);
}

.card-title { font-size: 1.05rem; font-weight: 700; color: #ffffff; margin-bottom: 0.2rem; }
.card-subtitle { font-size: 0.8rem; color: rgba(255,255,255,0.4); font-weight: 400; }
.card-desc { font-size: 0.875rem; color: rgba(255,255,255,0.5); line-height: 1.6; }

/* ── 프로그레스 바 ── */
.progress-bar-wrap {
  display: flex; flex-direction: column; gap: 0.4rem;
}
.progress-bar-row {
  display: flex; align-items: center; justify-content: space-between;
}
.progress-label { font-size: 0.775rem; color: rgba(255,255,255,0.45); }
.progress-pct { font-size: 0.775rem; color: #34d399; font-weight: 600; }

.progress-track {
  height: 6px; background: rgba(255,255,255,0.08);
  border-radius: 999px; overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #059669, #34d399);
  border-radius: 999px;
  transition: width 0.6s ease;
}
.progress-fill.complete {
  background: linear-gradient(90deg, #6366f1, #818cf8);
}

/* ── 모듈 수 태그 ── */
.card-modules {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.8rem; color: rgba(255,255,255,0.35);
}
.card-modules .dot {
  width: 3px; height: 3px; border-radius: 50%;
  background: rgba(255,255,255,0.2);
}

/* ── 최근 학습 이력 ── */
.history-list { display: flex; flex-direction: column; gap: 0.625rem; }

.history-item {
  display: flex; align-items: center; gap: 1rem;
  background: #1c1c24;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px; padding: 0.875rem 1rem;
  transition: border-color 0.15s;
}
.history-item:hover { border-color: rgba(16,185,129,0.2); }

.history-icon {
  font-size: 1.25rem; width: 2rem; text-align: center; flex-shrink: 0;
}
.history-content { flex: 1; min-width: 0; }
.history-title { font-size: 0.875rem; font-weight: 600; color: white; }
.history-meta {
  font-size: 0.775rem; color: rgba(255,255,255,0.35); margin-top: 0.15rem;
}
.history-time { font-size: 0.75rem; color: rgba(255,255,255,0.25); flex-shrink: 0; }

/* ── 빈 상태 ── */
.empty-state {
  text-align: center; padding: 3rem 2rem;
  background: #1c1c24;
  border: 1px dashed rgba(255,255,255,0.1);
  border-radius: 16px;
}
.empty-icon { font-size: 3rem; margin-bottom: 1rem; opacity: 0.4; }
.empty-title { font-size: 1rem; font-weight: 600; color: rgba(255,255,255,0.5); margin-bottom: 0.5rem; }
.empty-desc { font-size: 0.875rem; color: rgba(255,255,255,0.3); }

/* ── CTA 행 ── */
.cta-row { display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap; }

/* ──────────────────────────────────────────────
   curriculum.html — 커리큘럼 상세 (아코디언)
   ────────────────────────────────────────────── */
.curriculum-meta {
  background: rgba(16,185,129,0.07);
  border: 1px solid rgba(16,185,129,0.15);
  border-radius: 12px; padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  display: flex; align-items: center; gap: 2rem;
  flex-wrap: wrap;
}
.meta-item { display: flex; flex-direction: column; gap: 0.25rem; }
.meta-label { font-size: 0.7rem; color: rgba(255,255,255,0.35); text-transform: uppercase; letter-spacing: 0.06em; }
.meta-value { font-size: 0.95rem; font-weight: 700; color: white; }
.meta-value.green { color: #34d399; }

/* 아코디언 */
.accordion-list { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 2rem; }

.accordion-item {
  background: #1c1c24;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px; overflow: hidden;
  transition: border-color 0.2s;
}
.accordion-item.open { border-color: rgba(16,185,129,0.25); }
.accordion-item.completed-item { border-color: rgba(99,102,241,0.2); }

.accordion-header {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.1rem 1.25rem; cursor: pointer;
  transition: background 0.15s; user-select: none;
}
.accordion-header:hover { background: rgba(255,255,255,0.03); }

.accordion-num {
  width: 2rem; height: 2rem; border-radius: 50%;
  background: rgba(16,185,129,0.12); color: #34d399;
  font-size: 0.75rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.accordion-num.done {
  background: rgba(99,102,241,0.15); color: #818cf8;
}
.accordion-num.locked-num {
  background: rgba(255,255,255,0.05); color: rgba(255,255,255,0.2);
}

.accordion-info { flex: 1; min-width: 0; }
.accordion-title { font-size: 0.95rem; font-weight: 600; color: white; margin-bottom: 0.15rem; }
.accordion-subtitle { font-size: 0.8rem; color: rgba(255,255,255,0.4); }

.accordion-right {
  display: flex; align-items: center; gap: 0.75rem;
  flex-shrink: 0;
}
.module-time {
  font-size: 0.775rem; color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.05); padding: 0.2rem 0.6rem; border-radius: 6px;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,0.15);
}
.status-dot.dot-done { background: #6366f1; }
.status-dot.dot-active { background: #34d399; box-shadow: 0 0 6px rgba(52,211,153,0.5); }
.status-dot.dot-locked { background: rgba(255,255,255,0.1); }

.accordion-chevron {
  font-size: 0.75rem; color: rgba(255,255,255,0.3);
  transition: transform 0.2s;
}
.accordion-item.open .accordion-chevron { transform: rotate(180deg); }

.accordion-body {
  display: none; padding: 0 1.25rem 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.accordion-item.open .accordion-body { display: block; }

.accordion-desc {
  font-size: 0.875rem; color: rgba(255,255,255,0.5);
  line-height: 1.7; margin: 1rem 0;
}

.module-topics { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.topic-tag {
  font-size: 0.75rem; color: #34d399;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  padding: 0.2rem 0.6rem; border-radius: 999px;
}

/* ──────────────────────────────────────────────
   certificate.html — 수료증
   ────────────────────────────────────────────── */
.cert-container { max-width: 720px; }

.cert-card {
  background: linear-gradient(135deg, #1c1c24 0%, #22222e 100%);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: 20px; padding: 3rem;
  position: relative; overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: 0 0 60px rgba(16,185,129,0.06);
}
.cert-card::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 60% 40%, rgba(52,211,153,0.04) 0%, transparent 60%);
  pointer-events: none;
}
.cert-card::after {
  content: '';
  position: absolute; inset: 0; border-radius: 20px;
  border: 1px solid rgba(52,211,153,0.15);
  pointer-events: none;
}

.cert-watermark {
  position: absolute; bottom: 2rem; right: 2rem;
  font-size: 5rem; opacity: 0.04; line-height: 1;
  user-select: none; pointer-events: none;
}

.cert-header {
  text-align: center; border-bottom: 1px solid rgba(255,255,255,0.07);
  padding-bottom: 1.75rem; margin-bottom: 2rem;
}
.cert-logo { font-size: 0.875rem; color: rgba(255,255,255,0.35); margin-bottom: 1.5rem; letter-spacing: 0.15em; }
.cert-title { font-size: 1.75rem; font-weight: 900; color: white; margin-bottom: 0.5rem; }
.cert-subtitle { font-size: 0.875rem; color: #34d399; }

.cert-body { text-align: center; margin-bottom: 2rem; }
.cert-intro { font-size: 0.875rem; color: rgba(255,255,255,0.45); margin-bottom: 0.75rem; }
.cert-name {
  font-size: 2rem; font-weight: 900; color: #34d399;
  border-bottom: 2px solid rgba(52,211,153,0.3);
  display: inline-block; padding: 0 1.5rem 0.5rem; margin-bottom: 1.25rem;
}
.cert-course {
  font-size: 1rem; font-weight: 700; color: white;
  margin-bottom: 0.5rem;
}
.cert-detail { font-size: 0.875rem; color: rgba(255,255,255,0.45); }

.cert-footer {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.07); padding-top: 1.75rem;
}
.cert-meta-item { display: flex; flex-direction: column; gap: 0.3rem; }
.cert-meta-label { font-size: 0.7rem; color: rgba(255,255,255,0.3); text-transform: uppercase; letter-spacing: 0.08em; }
.cert-meta-value { font-size: 0.9rem; font-weight: 600; color: white; }

.cert-grade {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  padding: 0.35rem 1rem; border-radius: 8px;
  font-size: 0.875rem; font-weight: 700; color: #34d399;
}

/* 수료증 없음 상태 */
.cert-pending {
  background: #1c1c24;
  border: 1px dashed rgba(255,255,255,0.1);
  border-radius: 20px; padding: 3rem;
  text-align: center; margin-bottom: 2rem;
}
.cert-pending-icon { font-size: 4rem; margin-bottom: 1.25rem; opacity: 0.3; }
.cert-pending-title { font-size: 1.25rem; font-weight: 700; color: rgba(255,255,255,0.5); margin-bottom: 0.75rem; }
.cert-pending-desc { font-size: 0.9rem; color: rgba(255,255,255,0.35); line-height: 1.7; max-width: 400px; margin: 0 auto; }

/* 수료 요건 목록 */
.cert-requirements {
  background: #1c1c24;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 16px; padding: 1.75rem; margin-bottom: 2rem;
}
.cert-req-title { font-size: 1rem; font-weight: 700; color: white; margin-bottom: 1.25rem; }
.req-list { display: flex; flex-direction: column; gap: 0.75rem; }
.req-item { display: flex; align-items: center; gap: 0.875rem; }
.req-check {
  width: 1.375rem; height: 1.375rem; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700; flex-shrink: 0;
}
.req-check.done { background: rgba(16,185,129,0.15); color: #34d399; }
.req-check.pending { background: rgba(255,255,255,0.05); color: rgba(255,255,255,0.2); }
.req-text { font-size: 0.875rem; color: rgba(255,255,255,0.6); }
.req-text.completed { color: white; }

/* ── 수료증 액션 버튼 ── */
.cert-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ──────────────────────────────────────────────
   공통 로딩 스피너
   ────────────────────────────────────────────── */
.loading-spinner {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 1rem; padding: 4rem;
  color: rgba(255,255,255,0.4); font-size: 0.875rem;
}
.spinner-ring {
  width: 2.5rem; height: 2.5rem; border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: #34d399;
  animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── 알림 토스트 ── */
.toast {
  position: fixed; bottom: 2rem; right: 2rem;
  background: #1c2a1e; border: 1px solid rgba(16,185,129,0.3);
  color: #34d399; border-radius: 10px;
  padding: 0.875rem 1.25rem; font-size: 0.875rem; font-weight: 500;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  z-index: 9999; transform: translateY(0); opacity: 1;
  transition: all 0.3s;
}
.toast.hidden { transform: translateY(1rem); opacity: 0; pointer-events: none; }

/* ── 반응형 ── */
@media (max-width: 900px) {
  .curriculum-grid { grid-template-columns: 1fr; }
  .progress-summary { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; padding: 2rem 1.25rem; }
  .progress-summary { grid-template-columns: 1fr 1fr; }
  .cert-card { padding: 2rem 1.5rem; }
  .cert-name { font-size: 1.5rem; }
  .cert-footer { flex-direction: column; align-items: flex-start; }
  .curriculum-meta { gap: 1.25rem; }
}

@media (max-width: 480px) {
  .progress-summary { grid-template-columns: 1fr; }
  .main-content { padding: 1.5rem 1rem; }
  .page-title { font-size: 1.75rem; }
}