/* Reset and base */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #1a1a2e;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Phone frame — mobile viewport */
.phone-frame {
  width: 100%;
  max-width: 375px;
  min-height: 667px;
  max-height: 90vh;
  background: #0f0f1a;
  border-radius: 2rem;
  box-shadow: 0 0 0 3px #2a2a4a, 0 24px 48px rgba(0,0,0,0.5);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Screens — only one visible */
.screen {
  display: none;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  color: #e8e8f0;
}
.screen.screen-active {
  display: flex;
}

/* Header */
.screen-header {
  flex-shrink: 0;
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid #2a2a4a;
  background: #16162a;
}
.screen-header--with-back {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.screen-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}
.btn-back {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: #2a2a4a;
  color: #e8e8f0;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.btn-back:hover, .btn-back:focus {
  background: #3a3a5a;
  outline: none;
}

/* Search */
.search-wrap {
  flex-shrink: 0;
  padding: 0.75rem 1rem;
  background: #16162a;
}
.search-input {
  width: 100%;
  padding: 0.6rem 1rem;
  border: 1px solid #2a2a4a;
  border-radius: 0.5rem;
  background: #0f0f1a;
  color: #e8e8f0;
  font-size: 1rem;
}
.search-input::placeholder {
  color: #6a6a8a;
}
.search-input:focus {
  outline: none;
  border-color: #4a7cff;
}

/* Contact list */
.contact-list-wrap {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid #2a2a4a;
  cursor: pointer;
  min-height: 3.5rem;
}
.contact-item:hover, .contact-item:focus-visible {
  background: #1e1e3a;
  outline: none;
}
.contact-avatar {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: #3a3a6a;
  color: #c0c0e0;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-info {
  flex: 1;
  min-width: 0;
}
.contact-name {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}
.contact-phone {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: #8a8aaa;
}

/* Profile screen */
.profile-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1.5rem;
  text-align: center;
}
.profile-avatar {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  background: #3a3a6a;
  color: #c0c0e0;
  font-size: 1.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}
.profile-name {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  font-weight: 600;
}
.profile-phone {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: #8a8aaa;
}
.btn-call {
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 2rem;
  background: #22c55e;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 2.75rem;
}
.btn-call:hover, .btn-call:focus {
  background: #16a34a;
  outline: none;
}

/* Call screen */
.call-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  text-align: center;
}
.call-name {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  font-weight: 600;
}
.call-phone {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: #8a8aaa;
}
.call-status {
  margin: 0 0 3rem;
  font-size: 0.9rem;
  color: #6a6a8a;
}
.btn-end-call {
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 2rem;
  background: #dc2626;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 2.75rem;
}
.btn-end-call:hover, .btn-end-call:focus {
  background: #b91c1c;
  outline: none;
}