/* ============================================
   VATECH CADCAM CS Portal - Design System
   Apple-style Premium UI
   ============================================ */

/* --- Pretendard Font --- */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

/* --- CSS Custom Properties --- */
:root {
  /* Primary */
  --color-primary: #0071E3;
  --color-primary-dark: #0056B3;
  --color-primary-light: #E8F4FD;
  /* Neutral */
  --color-bg: #FFFFFF;
  --color-bg-secondary: #F5F5F7;
  --color-bg-card: rgba(255,255,255,0.72);
  --color-text: #1D1D1F;
  --color-text-secondary: #86868B;
  --color-border: #D2D2D7;
  /* Status */
  --color-success: #30D158;
  --color-warning: #FF9F0A;
  --color-danger: #FF3B30;
  --color-info: #5AC8FA;
  /* Category */
  --color-hyperdent: #5856D6;
  --color-dentalcad: #007AFF;
  --color-toolchange: #FF9500;
  /* Spacing */
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  /* Radius */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-pill: 980px;
  /* Shadow */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  /* Transition */
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: var(--color-primary); text-decoration: none; transition: opacity 0.2s var(--ease); }
a:hover { opacity: 0.8; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* --- Typography --- */
h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
h2 { font-size: 1.75rem; font-weight: 600; letter-spacing: -0.015em; line-height: 1.3; }
h3 { font-size: 1.375rem; font-weight: 600; line-height: 1.35; }
h4 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; }
.text-secondary { color: var(--color-text-secondary); }
.text-caption { font-size: 0.875rem; color: var(--color-text-secondary); }

@media (min-width: 1024px) {
  h1 { font-size: 3rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.section {
  padding: var(--space-3xl) 0;
}
.grid { display: grid; gap: var(--space-lg); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .container { max-width: 980px; }
}
@media (min-width: 1440px) {
  .container { max-width: 1200px; }
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  padding: var(--space-sm) 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.logo span { color: var(--color-primary); }
.header-nav { display: flex; gap: var(--space-md); align-items: center; }
.header-nav a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: color 0.2s;
}
.header-nav a:hover { color: var(--color-text); opacity: 1; }

/* --- Hero --- */
.hero {
  text-align: center;
  padding: var(--space-3xl) 0;
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}
.hero h1 { margin-bottom: var(--space-md); }
.hero p { font-size: 1.125rem; color: var(--color-text-secondary); max-width: 600px; margin: 0 auto var(--space-xl); }

/* --- Card --- */
.card {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.card-flat {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}
.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}
.card-icon.hyperdent { background: rgba(88,86,214,0.12); color: var(--color-hyperdent); }
.card-icon.dentalcad { background: rgba(0,122,255,0.12); color: var(--color-dentalcad); }
.card-icon.toolchange { background: rgba(255,149,0,0.12); color: var(--color-toolchange); }

/* --- Menu Grid --- */
.menu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  max-width: 600px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .menu-grid { grid-template-columns: repeat(5, 1fr); max-width: 700px; }
}
.menu-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-lg) var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  text-decoration: none;
  color: var(--color-text);
}
.menu-item:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  opacity: 1;
  transform: translateY(-2px);
}
.menu-item .icon { font-size: 1.75rem; }
.menu-item .label { font-size: 0.8125rem; font-weight: 500; text-align: center; }

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  text-decoration: none;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; opacity: 1; }
.btn-secondary { background: var(--color-bg-secondary); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-border); opacity: 1; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: #fff; opacity: 1; }
.btn-lg { padding: 16px 36px; font-size: 1.0625rem; }
.btn-sm { padding: 8px 20px; font-size: 0.875rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* --- Input --- */
.form-group { margin-bottom: var(--space-lg); }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: var(--space-xs); color: var(--color-text); }
.form-input {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-bg);
  transition: border-color 0.2s;
  outline: none;
}
.form-input:focus { border-color: var(--color-primary); }
.form-input::placeholder { color: var(--color-text-secondary); }
.form-select {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-bg);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2386868B' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  cursor: pointer;
  outline: none;
}
.form-select:focus { border-color: var(--color-primary); }
textarea.form-input { resize: vertical; min-height: 120px; }

/* --- Checklist --- */
.checklist { display: flex; flex-direction: column; gap: var(--space-sm); }
.check-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  user-select: none;
  min-height: 56px;
}
.check-item:hover { border-color: var(--color-primary-dark); }
.check-item.checked {
  border-color: var(--color-success);
  background: rgba(48,209,88,0.06);
}
.check-item .checkbox {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s var(--ease);
}
.check-item.checked .checkbox {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}
.check-item.checked .checkbox::after {
  content: '\2713';
  font-size: 14px;
  font-weight: 700;
}
.check-item .label { flex: 1; font-size: 0.9375rem; }

/* --- Progress Bar --- */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--color-bg-secondary);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: var(--space-lg);
}
.progress-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.4s var(--ease);
}
.progress-text {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

/* --- Step Card --- */
.step-card {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-lg);
  transition: border-color 0.2s;
}
.step-card.active { border-color: var(--color-primary); }
.step-card.completed { border-color: var(--color-success); }
.step-card-header {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}
.step-card-header h4 { display: flex; align-items: center; gap: var(--space-sm); }
.step-card-body { padding: var(--space-lg); display: none; }
.step-card.active .step-card-body { display: block; }
.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 700;
  background: var(--color-primary);
  color: #fff;
}
.step-card.completed .step-badge { background: var(--color-success); }

/* --- Submit Banner (sticky) --- */
.submit-banner {
  position: sticky;
  bottom: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(0,0,0,0.08);
  padding: var(--space-md) var(--space-lg);
  text-align: center;
  z-index: 50;
}
.submit-banner p { font-size: 0.875rem; color: var(--color-text-secondary); margin-bottom: var(--space-sm); }

/* --- Stats --- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  text-align: center;
}
.stat-item .number { font-size: 2rem; font-weight: 700; color: var(--color-primary); }
.stat-item .desc { font-size: 0.8125rem; color: var(--color-text-secondary); margin-top: 4px; }

/* --- Category Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-hyperdent { background: rgba(88,86,214,0.12); color: var(--color-hyperdent); }
.badge-dentalcad { background: rgba(0,122,255,0.12); color: var(--color-dentalcad); }
.badge-toolchange { background: rgba(255,149,0,0.12); color: var(--color-toolchange); }
.badge-pending { background: rgba(255,159,10,0.12); color: var(--color-warning); }
.badge-resolved { background: rgba(48,209,88,0.12); color: var(--color-success); }

/* --- Photo Upload --- */
.photo-upload {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.photo-upload-btn {
  width: 100px;
  height: 100px;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
}
.photo-upload-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.photo-upload-btn .icon { font-size: 1.5rem; margin-bottom: 4px; }
.photo-preview {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
}
.photo-preview img { width: 100%; height: 100%; object-fit: cover; }
.photo-preview .remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0,0,0,0.6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.75rem;
}

/* --- Alert --- */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}
.alert-warning { background: rgba(255,159,10,0.1); border: 1px solid rgba(255,159,10,0.3); color: #8A6400; }
.alert-info { background: rgba(0,113,227,0.08); border: 1px solid rgba(0,113,227,0.2); color: var(--color-primary-dark); }
.alert-success { background: rgba(48,209,88,0.08); border: 1px solid rgba(48,209,88,0.2); color: #1B7A2F; }

/* --- Footer --- */
.footer {
  text-align: center;
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
}
.footer a { color: var(--color-text-secondary); }

/* --- Accordion --- */
.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
}
.accordion-header {
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  background: var(--color-bg);
  transition: background 0.2s;
  font-weight: 500;
}
.accordion-header:hover { background: var(--color-bg-secondary); }
.accordion-header .arrow {
  transition: transform 0.3s var(--ease);
  color: var(--color-text-secondary);
}
.accordion-item.open .accordion-header .arrow { transform: rotate(180deg); }
.accordion-body {
  padding: 0 var(--space-lg) var(--space-lg);
  display: none;
}
.accordion-item.open .accordion-body { display: block; }

/* --- Page Header --- */
.page-header {
  padding: var(--space-2xl) 0 var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-xl);
}
.page-header .back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}
.page-header h1 { margin-bottom: var(--space-xs); }

/* --- Loading Spinner --- */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Toast --- */
.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
}
.toast {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-pill);
  background: var(--color-text);
  color: #fff;
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s var(--ease);
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- OCR Zone --- */
.ocr-zone {
  border: 3px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3xl) var(--space-xl);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}
.ocr-zone:hover, .ocr-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}
.ocr-zone .icon { font-size: 3rem; margin-bottom: var(--space-md); color: var(--color-text-secondary); }

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s var(--ease) forwards; }
.animate-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-delay-3 { animation-delay: 0.3s; opacity: 0; }
.animate-delay-4 { animation-delay: 0.4s; opacity: 0; }

.reveal { opacity: 0; transform: translateY(20px); transition: all 0.6s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* --- Utility --- */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.hidden { display: none !important; }

/* --- Admin Table --- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: var(--space-sm) var(--space-md); text-align: left; border-bottom: 1px solid var(--color-border); font-size: 0.875rem; }
th { font-weight: 600; background: var(--color-bg-secondary); position: sticky; top: 0; }
tr:hover td { background: rgba(0,0,0,0.02); }