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

:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface-light: #2a2a2a;
  --primary: #34c759;
  --primary-dark: #28a745;
  --danger: #ff3b30;
  --text: #fff;
  --text-dim: #8e8e93;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  max-width: 420px;
  margin: 0 auto;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.screen { width: 100%; }

/* === Login === */
#loginScreen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
}

.logo {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.login-card input, .login-card select {
  width: 100%;
  padding: 0.75rem;
  margin: 0.5rem 0;
  background: var(--surface-light);
  border: 1px solid #333;
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

.login-card input:focus, .login-card select:focus {
  border-color: var(--primary);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-dim);
  margin: 0.5rem 0;
}

.checkbox-label input { width: auto; }

/* === Buttons === */
.btn-primary {
  width: 100%;
  padding: 0.85rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn-primary:disabled { opacity: 0.5; cursor: default; }
.btn-primary:active { opacity: 0.8; }

.btn-secondary {
  padding: 0.6rem 1rem;
  background: var(--surface-light);
  color: var(--text);
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
}

.btn-small { padding: 0.5rem 0.75rem; font-size: 0.85rem; width: auto; }

.error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  text-align: center;
  margin-top: 0.5rem;
}

/* === App Header === */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 100;
}

.number-switcher {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  background: var(--surface-light);
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}

.switch-arrow { font-size: 0.7rem; color: var(--text-dim); }

.icon-btn {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* === Number Menu === */
.number-menu {
  position: fixed;
  top: 56px;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 380px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  z-index: 200;
  overflow: hidden;
}

.number-menu-header {
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-bottom: 1px solid #333;
}

.number-item {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: background 0.15s;
}

.number-item:hover, .number-item.active { background: var(--surface-light); }

.num-label { font-weight: 600; flex: 1; }
.num-user { font-size: 0.8rem; color: var(--text-dim); }
.num-delete {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

.number-menu-footer {
  padding: 0.75rem 1rem;
  color: var(--primary);
  cursor: pointer;
  font-weight: 600;
  border-top: 1px solid #333;
}

/* === Modal === */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  padding: 1rem;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 100%;
  max-width: 340px;
}

.modal-content h3 { margin-bottom: 1rem; }
.modal-content input {
  width: 100%;
  padding: 0.75rem;
  margin: 0.4rem 0;
  background: var(--surface-light);
  border: 1px solid #333;
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

.modal-buttons {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.modal-buttons button { flex: 1; }

/* === Tabs === */
.tabs {
  display: flex;
  background: var(--surface);
  position: sticky;
  top: 56px;
  z-index: 90;
}

.tab {
  flex: 1;
  padding: 0.75rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  font-size: 0.85rem;
  cursor: pointer;
  transition: color 0.2s, border 0.2s;
}

.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* === Tab Content === */
.tab-content { display: none; padding: 1rem; }
.tab-content.active { display: block; }

/* === Outbound Number Selector === */
.outbound-selector {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.outbound-selector label {
  font-size: 0.85rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.outbound-selector select {
  flex: 1;
  padding: 0.5rem;
  background: var(--surface);
  border: 1px solid #333;
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
}

/* === Keypad === */
.dial-display {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.dial-display input {
  flex: 1;
  background: var(--surface);
  border: none;
  border-radius: 8px;
  padding: 1rem;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text);
  text-align: center;
  outline: none;
  letter-spacing: 1px;
}

.del-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}

.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  max-width: 320px;
  margin: 0 auto 1rem;
}

.key {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--surface);
  border: none;
  border-radius: 50%;
  aspect-ratio: 1;
  color: var(--text);
  font-size: 1.8rem;
  font-weight: 400;
  cursor: pointer;
  transition: background 0.1s, transform 0.1s;
  max-width: 100px;
  margin: 0 auto;
}

.key span {
  font-size: 0.6rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.key:active {
  background: var(--surface-light);
  transform: scale(0.95);
}

.call-btn {
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  padding: 1rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.call-btn:active { opacity: 0.8; }

/* === List (Contacts / History) === */
.add-contact-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.add-contact-row input {
  flex: 1;
  padding: 0.6rem;
  background: var(--surface);
  border: 1px solid #333;
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
}

.list { display: flex; flex-direction: column; gap: 0.5rem; }

.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  transition: background 0.15s;
}

.list-item:hover { background: var(--surface-light); }

.contact-info { flex: 1; cursor: pointer; }
.contact-name { font-weight: 600; font-size: 0.95rem; }
.contact-number { font-size: 0.85rem; color: var(--text-dim); margin-top: 2px; }

.list-delete {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.empty-hint {
  text-align: center;
  color: var(--text-dim);
  padding: 2rem 1rem;
  font-size: 0.9rem;
}

/* === Call Overlay === */
.call-overlay {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  max-height: 45vh;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -8px 24px rgba(0,0,0,.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 1.5rem;
}

.call-info { text-align: center; margin-bottom: 3rem; }

.call-number {
  font-size: 1.8rem;
  font-weight: 300;
  margin-bottom: 0.5rem;
}

.call-status { color: var(--text-dim); font-size: 1rem; margin-bottom: 0.5rem; }

.call-timer { font-size: 1.2rem; font-weight: 300; color: var(--primary); }

.call-controls {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.call-ctrl {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  background: var(--surface-light);
  border: none;
  border-radius: 50%;
  width: 70px;
  height: 70px;
  font-size: 1.5rem;
  color: var(--text);
  cursor: pointer;
  transition: opacity 0.2s;
}

.call-ctrl span { font-size: 0.7rem; color: var(--text-dim); }
.call-ctrl:active { opacity: 0.7; }

.call-ctrl.active { background: #fff; color: #000; }

.call-end {
  background: var(--danger);
  color: #fff;
}

.call-answer {
  background: var(--primary);
  color: #fff;
}

.incoming-actions {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

@media (max-width: 380px) {
  .key { font-size: 1.5rem; }
  .call-number { font-size: 1.5rem; }
}