/*
 * 회의록 작성 및 공유 개선 서비스 - 공통 스타일시트
 * 버전: 1.0
 * 작성일: 2025-10-20
 * 레퍼런스: 스타일 가이드 v1.0
 */

/* ===== CSS Reset ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== Root Variables (CSS Custom Properties) ===== */
:root {
  /* Primary Colors */
  --color-primary-light: #4DFFDB;
  --color-primary-main: #00D9B1;
  --color-primary-dark: #00A88A;

  /* Secondary Colors */
  --color-secondary-light: #A5B4FC;
  --color-secondary-main: #6366F1;
  --color-secondary-dark: #4F46E5;

  /* Semantic Colors */
  --color-success-light: #6EE7B7;
  --color-success-main: #10B981;
  --color-success-dark: #059669;

  --color-warning-light: #FCD34D;
  --color-warning-main: #F59E0B;
  --color-warning-dark: #D97706;

  --color-error-light: #FCA5A5;
  --color-error-main: #EF4444;
  --color-error-dark: #DC2626;

  --color-info-light: #93C5FD;
  --color-info-main: #3B82F6;
  --color-info-dark: #2563EB;

  /* Neutral Colors */
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  --color-white: #FFFFFF;
  --color-black: #000000;

  /* Spacing System (8px base) */
  --spacing-0: 0;
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;
  --spacing-16: 64px;
  --spacing-20: 80px;

  /* Font Sizes */
  --font-size-display: 48px;
  --font-size-h1: 36px;
  --font-size-h2: 30px;
  --font-size-h3: 24px;
  --font-size-h4: 20px;
  --font-size-body-large: 18px;
  --font-size-body: 16px;
  --font-size-body-small: 14px;
  --font-size-caption: 12px;

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-modal-backdrop: 1200;
  --z-modal: 1300;
  --z-toast: 1400;
  --z-tooltip: 1500;
}

/* ===== Typography ===== */
body {
  font-family: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'Apple SD Gothic Neo', sans-serif;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-gray-600);
  background-color: var(--color-gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-gray-900);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

h1 { font-size: var(--font-size-h1); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-h2); font-weight: var(--font-weight-semibold); }
h3 { font-size: var(--font-size-h3); font-weight: var(--font-weight-semibold); line-height: var(--line-height-normal); }
h4 { font-size: var(--font-size-h4); font-weight: var(--font-weight-semibold); }

a {
  color: var(--color-primary-main);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* ===== Layout Utilities ===== */
.container {
  width: 100%;
  padding: 0 var(--spacing-6);
  margin: 0 auto;
}

@media (min-width: 768px) {
  .container { padding: 0 var(--spacing-8); }
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--spacing-16); }
}

.container-small { max-width: 640px; }
.container-medium { max-width: 768px; }
.container-large { max-width: 1024px; }
.container-xlarge { max-width: 1280px; }
.container-2xlarge { max-width: 1536px; }

/* ===== Button Styles ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary-main);
  color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-dark);
  transform: scale(0.98);
}

.btn-primary:disabled {
  background-color: var(--color-gray-300);
  color: var(--color-gray-500);
}

/* Secondary Button */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-main);
  border: 1px solid var(--color-primary-main);
}

.btn-secondary:hover:not(:disabled) {
  background-color: rgba(0, 217, 177, 0.1);
}

.btn-secondary:active:not(:disabled) {
  background-color: rgba(0, 217, 177, 0.2);
}

.btn-secondary:disabled {
  border-color: var(--color-gray-300);
  color: var(--color-gray-400);
}

/* Text Button */
.btn-text {
  background-color: transparent;
  color: var(--color-gray-700);
  padding: var(--spacing-2) var(--spacing-4);
}

.btn-text:hover:not(:disabled) {
  background-color: var(--color-gray-100);
}

.btn-text:active:not(:disabled) {
  background-color: var(--color-gray-200);
}

/* Button Sizes */
.btn-sm { padding: var(--spacing-2) var(--spacing-4); font-size: var(--font-size-body-small); }
.btn-lg { padding: var(--spacing-4) var(--spacing-8); font-size: var(--font-size-body-large); }

/* Icon Button */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: transparent;
}

.btn-icon:hover:not(:disabled) {
  background-color: var(--color-gray-100);
}

.btn-icon-sm { width: 32px; height: 32px; }
.btn-icon-lg { width: 48px; height: 48px; }

/* Floating Action Button */
.fab {
  position: fixed;
  right: var(--spacing-4);
  bottom: var(--spacing-4);
  width: 56px;
  height: 56px;
  padding: 0;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-main);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: var(--z-sticky);
}

.fab:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}

.fab:active {
  transform: scale(0.95);
}

/* ===== Form Styles ===== */
.form-group {
  margin-bottom: var(--spacing-4);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-size: var(--font-size-body-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-size: var(--font-size-body);
  font-family: inherit;
  background-color: var(--color-white);
  transition: all var(--transition-fast);
}

.form-input {
  height: 48px;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: 4px solid rgba(0, 217, 177, 0.2);
  border-color: var(--color-primary-main);
  border-width: 2px;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-400);
}

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
  background-color: var(--color-gray-100);
  color: var(--color-gray-400);
  cursor: not-allowed;
}

.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--color-error-main);
}

.form-error {
  display: block;
  margin-top: var(--spacing-1);
  font-size: var(--font-size-body-small);
  color: var(--color-error-main);
}

/* ===== Card Styles ===== */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card.interactive:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  cursor: pointer;
}

.card.interactive:active {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  transform: scale(0.99);
}

.card-header {
  margin-bottom: var(--spacing-4);
}

.card-title {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
}

.card-body {
  color: var(--color-gray-600);
}

/* ===== Badge Styles ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  line-height: 1;
}

.badge-primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success-dark);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning-dark);
}

.badge-error {
  background-color: var(--color-error-light);
  color: var(--color-error-dark);
}

.badge-neutral {
  background-color: var(--color-gray-200);
  color: var(--color-gray-700);
}

/* ===== Modal Styles ===== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
  opacity: 0;
  animation: fadeIn var(--transition-base);
  animation-fill-mode: forwards;
}

.modal {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  opacity: 0;
  transform: scale(0.95);
  animation: modalIn var(--transition-base);
  animation-fill-mode: forwards;
}

.modal-header {
  margin-bottom: var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
}

.modal-close {
  padding: var(--spacing-2);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-500);
  font-size: 24px;
  line-height: 1;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-gray-700);
}

.modal-body {
  margin-bottom: var(--spacing-8);
}

.modal-footer {
  display: flex;
  gap: var(--spacing-3);
  justify-content: flex-end;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes modalIn {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ===== Toast Styles ===== */
.toast-container {
  position: fixed;
  top: var(--spacing-4);
  right: var(--spacing-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.toast {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-4) var(--spacing-5);
  max-width: 400px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  border-left: 4px solid var(--color-gray-400);
  animation: slideInRight var(--transition-base);
}

.toast-success { border-left-color: var(--color-success-main); }
.toast-error { border-left-color: var(--color-error-main); }
.toast-warning { border-left-color: var(--color-warning-main); }
.toast-info { border-left-color: var(--color-info-main); }

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-1);
}

.toast-message {
  font-size: var(--font-size-body-small);
  color: var(--color-gray-600);
}

.toast-close {
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-500);
  font-size: 16px;
  line-height: 1;
}

@keyframes slideInRight {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ===== Loading Styles ===== */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-primary-main);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

.spinner-sm { width: 24px; height: 24px; border-width: 3px; }
.spinner-lg { width: 56px; height: 56px; border-width: 5px; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton {
  background-color: var(--color-gray-200);
  border-radius: var(--radius-sm);
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }

.hidden { display: none; }
.block { display: block; }

/* ===== 회의록 서비스 특화 스타일 ===== */

/* 상태 배지 - 회의록 전용 */
.status-draft {
  background-color: var(--color-warning-light);
  color: var(--color-warning-dark);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
}

.status-verifying {
  background-color: var(--color-info-light);
  color: var(--color-info-dark);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
}

.status-confirmed {
  background-color: var(--color-success-light);
  color: var(--color-success-dark);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
}

/* 전문용어 하이라이트 */
.term-highlight {
  border-bottom: 2px dotted var(--color-primary-main);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.term-highlight:hover {
  color: var(--color-primary-dark);
}

/* AI 제안 영역 */
.ai-suggestion {
  background-color: var(--color-gray-50);
  border: 1px dashed var(--color-primary-main);
  border-radius: var(--radius-md);
  padding: var(--spacing-4);
  margin: var(--spacing-4) 0;
  position: relative;
}

.ai-suggestion::before {
  content: "✨ AI 제안";
  position: absolute;
  top: -10px;
  left: var(--spacing-4);
  background-color: var(--color-white);
  padding: 0 var(--spacing-2);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary-main);
}

/* Todo 카드 */
.todo-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--spacing-4);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.todo-card.priority-high {
  border-left: 4px solid var(--color-error-main);
}

.todo-card.priority-medium {
  border-left: 4px solid var(--color-warning-main);
}

.todo-progress {
  height: 4px;
  background-color: var(--color-gray-200);
  border-radius: 2px;
  overflow: hidden;
  margin-top: var(--spacing-3);
}

.todo-progress-bar {
  height: 100%;
  background-color: var(--color-primary-main);
  transition: width var(--transition-slow);
}

/* 협업 커서 (예시) */
.collab-cursor {
  position: absolute;
  width: 2px;
  height: 20px;
  pointer-events: none;
  z-index: 100;
}

.collab-cursor-label {
  position: absolute;
  top: -24px;
  left: 0;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-caption);
  color: var(--color-white);
  white-space: nowrap;
}

/* 반응형 유틸리티 */
@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .hide-tablet { display: none !important; }
}

@media (min-width: 1024px) {
  .hide-desktop { display: none !important; }
}