@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap");

/* 색상 변수 */
:root {
  --white: #ffffff;
  --black: #000000;
  --gray-50: #fafafa;
  --gray-100: #f4f4f5;
  --gray-200: #e4e4e7;
  --gray-300: #d4d4d8;
  --gray-400: #a1a1aa;
  --gray-500: #71717a;
  --gray-600: #52525b;
  --gray-700: #3f3f46;
  --gray-800: #27272a;
  --gray-900: #18181b;
  --blue: #3b82f6;
  --blue-dark: #2563eb;
  --purple: #a855f7;
  --pink: #ec4899;
  --red: #ef4444;
  --orange: #f97316;
  --green: #10b981;
  --emerald: #34d399;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 네비게이션 */
.nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 100;
}

.nav-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-actions {
  display: flex;
  gap: 12px;
}

.icon-btn {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: none;
  background: var(--white);
  color: var(--gray-700);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.icon-btn:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.icon-btn.active {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: var(--white);
}

.badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--red);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 버튼 */
.btn-primary {
  padding: 14px 28px;
  border-radius: 14px;
  border: none;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: var(--white);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
  transition: all 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  padding: 14px 28px;
  border-radius: 12px;
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-700);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
}

/* 폼 스타일 */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: 12px;
  font-size: 15px;
  font-family: inherit;
  background: var(--white);
  transition: all 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
  min-height: 200px;
  resize: vertical;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 32px;
}

/* 반응형 */
@media (max-width: 768px) {
  .nav-content {
    padding: 16px;
  }
}