/* ========== Page Header ========== */
.page-header {
  padding: 160px 80px 80px;
  max-width: 1400px;
  margin: 0 auto;
}

.page-header h1 {
  margin-bottom: 16px;
  font-size: 3.5rem;
  font-weight: 600;
  letter-spacing: -1px;
}

.page-header p {
  max-width: 600px;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* ========== About Page ========== */
.about-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 80px 120px;
}

.about-section {
  margin-bottom: 60px;
}

.about-section h2 {
  margin-bottom: 24px;
}

.about-section p {
  line-height: 1.8;
  margin-bottom: 16px;
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.mission-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  transition: all 0.3s ease;
}

.mission-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}

.mission-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 12px;
  color: white;
}

.mission-card h4 {
  margin-bottom: 12px;
}

.mission-card p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.team-member {
  text-align: center;
}

.team-avatar {
  width: 100px;
  height: 100px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: white;
}

.team-member h4 {
  margin-bottom: 4px;
}

.team-member p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ========== Friends Page ========== */
.friends-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 80px 120px;
}

.friends-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 48px;
}

.friends-header h2 {
  font-size: 2rem;
  font-weight: 600;
}

.empty-state {
  text-align: center;
  padding: 100px 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.empty-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  color: var(--text-secondary);
}

.empty-state h3 {
  margin-bottom: 12px;
}

.empty-state p {
  margin-bottom: 24px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.friends-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.friend-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: all 0.3s ease;
}

.friend-card:hover {
  border-color: var(--text-primary);
}

.friend-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  flex-shrink: 0;
}

.friend-info {
  flex: 1;
}

.friend-info h4 {
  margin-bottom: 4px;
}

.friend-uuid {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: monospace;
}

.friend-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.friend-status {
  flex-shrink: 0;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
}

.status-badge.online {
  background: transparent;
  color: #22c55e;
}

.status-badge.offline {
  background: transparent;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-badge.online .status-dot {
  background: #22c55e;
  animation: pulse 2s infinite;
}

.status-badge.offline .status-dot {
  background: var(--text-secondary);
}

.friend-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.9rem;
}

.btn-remove {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

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

/* ========== Contact Page ========== */
.contact-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 80px 120px;
}

.contact-section-title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -1px;
  margin-bottom: 64px;
}

.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 80px;
}

.contact-info-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  text-align: left;
}

.contact-info-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 16px;
}

.contact-info-card p {
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.8;
}

.contact-form-wrapper {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 60px;
  box-shadow: var(--shadow-glow);
}

.contact-form-header {
  text-align: center;
  margin-bottom: 48px;
}

.contact-form-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #fff;
}

.contact-form-icon svg {
  width: 28px;
  height: 28px;
}

.contact-form-wrapper h2 {
  margin-bottom: 8px;
  text-align: center;
  font-size: 2rem;
  font-weight: 600;
}

.contact-form-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contact-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.contact-form .form-group {
  margin-bottom: 24px;
}

.contact-form .form-group label {
  display: block;
  font-family: var(--font-head);
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 16px;
  color: var(--text-secondary);
  width: 18px;
  height: 18px;
  pointer-events: none;
  transition: color 0.3s ease;
  z-index: 1;
}

.input-wrapper input,
.input-wrapper select {
  width: 100%;
  padding: 14px 18px 14px 48px;
  background: var(--bg-primary);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
}

.input-wrapper select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23525252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
}

.input-wrapper input:focus,
.input-wrapper select:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.08);
}

.input-wrapper input:focus + .input-icon,
.input-wrapper:focus-within .input-icon {
  color: var(--accent-cyan);
}

.input-wrapper input::placeholder {
  color: var(--text-secondary);
}

.textarea-wrapper {
  align-items: flex-start;
}

.textarea-wrapper .input-icon {
  top: 16px;
  left: 16px;
}

.contact-form textarea {
  width: 100%;
  min-height: 150px;
  padding: 14px 18px 14px 48px;
  background: var(--bg-primary);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  resize: vertical;
  transition: all 0.3s ease;
}

.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.08);
}

.contact-form textarea::placeholder {
  color: var(--text-secondary);
}

.form-submit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.btn-contact-submit {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 12px;
  transition: all 0.3s ease;
}

.btn-contact-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.2);
}

.form-submit-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.form-submit-note::before {
  content: '🔒';
  font-size: 0.75rem;
}

/* ========== How To Use Page ========== */
.how-to-use-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 80px 120px;
}

.steps-guide {
  margin-bottom: 80px;
}

.step-item {
  display: flex;
  gap: 32px;
  margin-bottom: 48px;
  align-items: flex-start;
}

.step-number-large {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 50%;
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
}

.step-content h3 {
  margin-bottom: 12px;
}

.step-content p {
  line-height: 1.7;
}

.safety-tips {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 60px;
}

.safety-tips h2 {
  margin-bottom: 48px;
  text-align: left;
  font-size: 2rem;
  font-weight: 600;
}

.tip-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tip-card {
  padding: 24px;
  background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 12px;
}

.tip-card.warning {
  background: rgba(234, 179, 8, 0.05);
  border-color: rgba(234, 179, 8, 0.2);
}

.tip-card.success {
  background: rgba(34, 197, 94, 0.05);
  border-color: rgba(34, 197, 94, 0.2);
}

.tip-card h4 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.tip-card p {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .mission-grid,
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .page-header {
    padding: 140px 24px 40px;
  }

  .page-header h1 {
    font-size: 2.5rem;
  }

  .about-content,
  .contact-container,
  .how-to-use-container,
  .friends-container {
    padding: 0 24px 80px;
  }

  .mission-grid,
  .team-grid,
  .contact-info-grid,
  .tip-grid {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 32px;
  }

  .contact-form-row {
    grid-template-columns: 1fr;
  }

  .contact-section-title {
    font-size: 2rem;
  }

  .friend-card {
    flex-wrap: wrap;
    text-align: center;
  }

  .friend-info {
    width: 100%;
    order: -1;
  }

  .friend-actions {
    width: 100%;
    justify-content: center;
  }

  .step-item {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .friends-header {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .friends-header h2 {
    font-size: 1.5rem;
  }
}