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

:root {
  --primary: #00BB74;
  --primary-dark: #009960;
  --dark-bg: #111111;
  --light-bg: #F9FAFB;
  --card-bg: #F3F4F6;
  --text-primary: #111111;
  --text-secondary: #6B7280;
  --border: #E5E7EB;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(0,0,0,0.07);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --transition: all 0.22s ease;
}

/* ===== SPINNER ===== */
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }


html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans KR', sans-serif;
  background: #F5F6F8;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.container { max-width: 860px; margin: 0 auto; padding: 0 24px; }

/* ===== NAVBAR ===== */
.navbar {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 58px;
}
.nav-logo img { height: 40px; width: auto; display: block; }
.nav-tool-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 4px 12px;
  background: var(--card-bg);
  border-radius: 50px;
}

/* ===== PROGRESS BAR ===== */
.progress-bar-wrap {
  height: 3px;
  background: var(--border);
  position: sticky;
  top: 58px;
  z-index: 99;
}
.progress-bar {
  height: 100%;
  background: var(--primary);
  transition: width 0.4s ease;
  width: 50%;
}

/* ===== STEP INDICATORS ===== */
.steps-wrap {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 61px;
  z-index: 98;
}
.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  cursor: default;
  opacity: 0.35;
  transition: var(--transition);
  min-width: 100px;
}
.step.active, .step.done { opacity: 1; }
.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.step.active .step-num {
  background: var(--primary);
  color: #fff;
}
.step.done .step-num {
  background: var(--dark-bg);
  color: #fff;
}
.step-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.step.active .step-label { color: var(--primary); font-weight: 700; }
.step.done .step-label { color: var(--text-primary); }
.step-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  min-width: 40px;
  max-width: 120px;
}

/* ===== MAIN ===== */
.main { flex: 1; padding: 48px 0 80px; }

/* ===== STEP PANELS ===== */
.step-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}
.step-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* Panel header */
.panel-header { text-align: center; margin-bottom: 40px; }
.panel-badge {
  display: inline-block;
  padding: 5px 14px;
  background: var(--dark-bg);
  color: #fff;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.panel-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 12px;
}
.panel-sub { font-size: 1rem; color: var(--text-secondary); word-break: keep-all; }

/* ===== UPLOAD SECTION ===== */
.upload-section {
  margin-bottom: 28px;
}
.upload-section-optional {
  margin-bottom: 12px;
}
.upload-section-label {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.upload-section-label .required {
  font-size: 0.75rem;
  font-weight: 700;
  color: #EF4444;
  padding: 2px 8px;
  background: #FEF2F2;
  border-radius: 50px;
}
.optional-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 2px 8px;
  background: var(--card-bg);
  border-radius: 50px;
}

/* ===== UPLOAD ZONE ===== */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 20px;
  padding: 60px 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: #fff;
  margin-bottom: 16px;
}
.upload-zone:hover { border-color: var(--primary); background: #F0FDF4; }
.upload-zone.dragover { border-color: var(--primary); background: #F0FDF4; }
.upload-zone-sm {
  padding: 36px 32px;
}
.upload-icon { font-size: 2.5rem; margin-bottom: 14px; }
.upload-main { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.upload-sub { font-size: 0.85rem; color: var(--text-secondary); }

/* File preview */
.file-preview {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: #F0FDF4;
  border: 1px solid var(--primary);
  border-radius: 10px;
  margin-bottom: 24px;
}
.file-icon { font-size: 1.2rem; }
.file-name { flex: 1; font-size: 0.9rem; font-weight: 600; }
.file-remove {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1rem;
  padding: 4px;
  transition: var(--transition);
}
.file-remove:hover { color: #EF4444; }

/* ===== EDITOR ===== */
.editor-wrap {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
}
.editor-toolbar {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--card-bg);
}
.toolbar-btn {
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-primary);
}
.toolbar-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 복사 버튼 강조 */
.toolbar-btn-copy {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  font-weight: 700;
}
.toolbar-btn-copy:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,187,116,0.3);
}

.editor {
  min-height: 400px;
  padding: 28px;
  font-size: 0.93rem;
  line-height: 1.9;
  white-space: pre-wrap;
  outline: none;
  word-break: keep-all;
  color: var(--text-primary);
  font-family: inherit;
}

/* ===== COPY GUIDE ===== */
.copy-guide {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 24px;
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: 14px;
  margin-bottom: 28px;
}
.copy-guide-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  line-height: 1.4;
}
.copy-guide-text {
  flex: 1;
}
.copy-guide-text strong {
  font-size: 0.9rem;
  display: block;
  margin-bottom: 10px;
  color: #92400E;
}
.copy-guide-channels {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.channel-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: #fff;
  border: 1px solid #FDE68A;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #78350F;
}

/* ===== BUTTONS ===== */
.panel-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 32px;
}
.btn-primary {
  padding: 14px 32px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,187,116,0.25); }
.btn-secondary {
  padding: 14px 28px;
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}
.btn-secondary:hover { background: var(--border); }

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--dark-bg);
  color: #fff;
  padding: 12px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 999;
  max-width: 90vw;
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== FOOTER ===== */
.footer {
  padding: 24px;
  text-align: center;
  background: var(--dark-bg);
  color: rgba(255,255,255,0.3);
  font-size: 0.82rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .steps { overflow-x: auto; justify-content: flex-start; padding: 0 8px; }
  .step-line { min-width: 20px; }
  .step { min-width: 80px; }
  .step-label { font-size: 0.7rem; }
  .main { padding: 32px 0 60px; }
  .panel-actions { flex-wrap: wrap; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .editor-toolbar { flex-wrap: wrap; }
  .copy-guide-channels { gap: 6px; }
  .channel-tag { font-size: 0.75rem; padding: 4px 10px; }
}