:root {
  --primary-color: #4a9eff;
  --secondary-color: #7289da;
  --dark-bg: #1a1a1a;
  --card-bg: #2a2a2a;
  --text-color: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: 'Segoe UI', 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif;
  background: var(--dark-bg);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 네비게이션 */
.navbar {
  background: var(--card-bg);
  border-bottom: 2px solid var(--primary-color);
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand h1 {
  font-size: 24px;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 25px;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--primary-color);
}

/* 버튼 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 16px;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: #357abd;
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #3a3a3a;
}

.btn-discord {
  background: var(--secondary-color);
  color: white;
}

.btn-discord:hover {
  background: #5b6eae;
}

.btn-download {
  background: var(--card-bg);
  color: var(--text-color);
  border: 2px solid var(--primary-color);
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 200px;
  justify-content: center;
}

.btn-download:hover {
  background: var(--primary-color);
}

.download-icon {
  font-size: 24px;
}

/* 히어로 섹션 */
.hero {
  text-align: center;
  padding: 100px 20px;
  background: linear-gradient(135deg, #1a1a1a 0%, #2a2a4a 100%);
}

.hero h2 {
  font-size: 48px;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.hero p {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 기능 섹션 */
.features {
  padding: 80px 20px;
}

.features h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 50px;
  color: var(--primary-color);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  transition: transform 0.3s;
  border: 1px solid var(--border-color);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 15px;
}

.feature-card h3 {
  font-size: 22px;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.feature-card p {
  color: var(--text-secondary);
}

/* 프로필 섹션 */
.profile-section {
  padding: 80px 20px;
  background: var(--card-bg);
}

.profile-section h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 40px;
  color: var(--primary-color);
}

.profile-card {
  background: var(--dark-bg);
  padding: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 30px;
  max-width: 800px;
  margin: 0 auto 30px;
  border: 1px solid var(--border-color);
}

.user-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--primary-color);
}

.profile-info {
  flex: 1;
}

.profile-info h3 {
  font-size: 28px;
  margin-bottom: 5px;
}

.profile-info p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.profile-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.edit-form {
  background: var(--dark-bg);
  padding: 30px;
  border-radius: 12px;
  max-width: 600px;
  margin: 20px auto;
  border: 1px solid var(--border-color);
}

.edit-form h3 {
  margin-bottom: 20px;
  color: var(--primary-color);
}

.edit-form input {
  width: 100%;
  padding: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 16px;
  margin-bottom: 15px;
}

.form-buttons {
  display: flex;
  gap: 10px;
}

/* 채널 섹션 */
.channels-section {
  padding: 80px 20px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.section-header h2 {
  font-size: 36px;
  color: var(--primary-color);
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
}

.channel-card {
  background: var(--card-bg);
  padding: 25px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
  cursor: pointer;
}

.channel-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 5px 20px rgba(74, 158, 255, 0.3);
}

.channel-card-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 15px;
}

.channel-name {
  font-size: 20px;
  font-weight: bold;
  color: var(--primary-color);
}

.channel-lock {
  font-size: 18px;
}

.channel-description {
  color: var(--text-secondary);
  margin-bottom: 15px;
  min-height: 40px;
}

.channel-info {
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 14px;
}

.channel-owner {
  color: var(--text-secondary);
}

.channel-members {
  color: var(--primary-color);
}

/* 다운로드 섹션 */
.download-section {
  padding: 80px 20px;
  background: var(--card-bg);
  text-align: center;
}

.download-section h2 {
  font-size: 36px;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.download-section > p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.download-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.download-info {
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
  background: var(--dark-bg);
  padding: 30px;
  border-radius: 12px;
}

.download-info h3 {
  color: var(--primary-color);
  margin-bottom: 20px;
}

.download-info ol {
  padding-left: 20px;
}

.download-info li {
  margin-bottom: 10px;
  color: var(--text-secondary);
}

/* 인증 성공 */
.auth-success {
  padding: 100px 20px;
  text-align: center;
}

.auth-success h2 {
  font-size: 48px;
  margin-bottom: 20px;
  color: #4caf50;
}

.auth-success code {
  background: var(--card-bg);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 18px;
  color: var(--primary-color);
}

/* 모달 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--card-bg);
  border-radius: 12px;
  max-width: 500px;
  width: 90%;
  border: 1px solid var(--border-color);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  color: var(--primary-color);
  font-size: 24px;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 28px;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal-body {
  padding: 20px;
}

.modal-footer {
  padding: 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.form-input {
  width: 100%;
  padding: 12px;
  background: var(--dark-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 16px;
  margin-bottom: 15px;
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

textarea.form-input {
  resize: vertical;
  min-height: 100px;
}

/* 푸터 */
footer {
  background: var(--card-bg);
  padding: 40px 20px;
  text-align: center;
  border-top: 2px solid var(--primary-color);
}

footer p {
  color: var(--text-secondary);
  margin-bottom: 5px;
}

/* 반응형 */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    gap: 15px;
  }

  .hero h2 {
    font-size: 32px;
  }

  .hero p {
    font-size: 16px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .profile-card {
    flex-direction: column;
    text-align: center;
  }

  .channels-grid {
    grid-template-columns: 1fr;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }
}

/* 채널 참여 버튼 */
.btn-join {
  width: 100%;
  padding: 0.75rem;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
  margin-top: 1rem;
}

.btn-join:hover {
  background: var(--primary-hover);
}

.login-required {
  text-align: center;
  padding: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  margin-top: 1rem;
}

/* 비밀번호 모달 */
/* 비밀번호 입력 모달용 스타일 */
.password-modal {
  display: flex !important;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

/* 비밀번호 입력 모달 전용 스타일 */
.password-modal .modal-content {
  position: relative;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  z-index: 1001;
}

.password-modal .modal-content h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.password-modal .modal-content p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.password-modal .modal-content .input {
  width: 100%;
  padding: 0.75rem;
  background: var(--dark-bg);
  border: 2px solid transparent;
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: 1.5rem;
  box-sizing: border-box;
  transition: border-color 0.3s;
}

.password-modal .modal-content .input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.modal-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.btn-primary, .btn-secondary {
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  border: none;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--text-secondary);
}

.btn-secondary:hover {
  border-color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}