:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-bg: #dbeafe;
  --bg: #f3f4f6;
  --surface: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --text-2: #4b5563;
  --text-3: #9ca3af;
  --green: #16a34a;
  --green-dark: #15803d;
  --green-bg: #dcfce7;
  --red: #dc2626;
  --red-dark: #b91c1c;
  --red-bg: #fee2e2;
  --amber: #d97706;
  --amber-dark: #92400e;
  --amber-bg: #fef3c7;
  --radius: 16px;
  --radius-sm: 10px;
  --tap-min: 48px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 16px 32px;
}

h1,
h2 {
  margin: 0 0 8px;
}

p {
  margin: 0 0 12px;
  line-height: 1.45;
}

button {
  font: inherit;
  cursor: pointer;
}

svg {
  flex-shrink: 0;
}

/* App header */

.app-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 0;
}

.app-header__back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-min);
  height: var(--tap-min);
  margin-left: -12px;
  border: none;
  background: none;
  color: var(--text);
  border-radius: 999px;
}

.app-header__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
}

.app-header__title {
  font-weight: 700;
  font-size: 1.05rem;
}

/* Buttons */

.primary-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: var(--tap-min);
  padding: 14px 20px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--blue);
  color: #fff;
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.primary-button:disabled {
  background: var(--border);
  color: var(--text-3);
}

.primary-button:not(:disabled):active {
  background: var(--blue-dark);
}

.primary-button--large {
  font-size: 1.1rem;
  padding: 18px;
}

.secondary-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: var(--tap-min);
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  margin-bottom: 10px;
}

.secondary-button:disabled {
  color: var(--text-3);
}

.link-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  min-height: var(--tap-min);
  padding: 8px 0;
  border: none;
  background: none;
  color: var(--blue);
  font-weight: 600;
}

/* Home screen */

.home-screen__title {
  font-size: 1.5rem;
  margin-top: 8px;
}

.home-screen__intro {
  color: var(--text-2);
}

.home-screen__illustration {
  display: flex;
  justify-content: center;
  padding: 24px 0 28px;
  color: var(--blue);
}

.home-screen__video-wrapper {
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  margin-bottom: 12px;
}

.home-screen__video {
  width: 100%;
  display: block;
}

.home-screen__help {
  margin-top: 8px;
  padding: 14px 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-2);
  font-weight: 600;
}

.home-screen__help-text {
  margin-top: 10px;
  padding: 12px 14px;
  background: var(--blue-bg);
  border-radius: var(--radius-sm);
  color: #1e3a8a;
  font-size: 0.92rem;
}

.home-screen__error-detail {
  margin: -8px 0 12px;
  color: var(--text-3);
  font-size: 0.75rem;
  font-family: ui-monospace, monospace;
  word-break: break-word;
}

/* IMEI detected screen */

.imei-detected__title {
  font-size: 1.3rem;
}

.imei-detected__badge {
  text-align: center;
  background: var(--green-bg);
  border-radius: var(--radius);
  padding: 24px 16px;
  margin-bottom: 16px;
}

.imei-detected__badge-icon {
  display: inline-flex;
  color: var(--green-dark);
  margin-bottom: 10px;
}

.imei-detected__label {
  color: var(--green-dark);
  margin: 0;
  font-size: 0.85rem;
  font-weight: 600;
}

.imei-detected__value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin: 4px 0 0;
}

.imei-detected__warning {
  color: var(--amber-dark);
  background: var(--amber-bg);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.9rem;
}

/* Info panel / info box (shared) */

.info-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin: 4px 0 14px;
}

.info-panel__title {
  color: var(--text-2);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.info-panel__row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}

.info-panel__row:first-of-type {
  border-top: none;
}

.info-panel__row span:last-child {
  font-weight: 600;
}

.info-box {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: var(--blue-bg);
  color: #1e3a8a;
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 0.9rem;
}

.info-box svg {
  margin-top: 2px;
  color: var(--blue);
}

/* Manual entry screen */

.manual-entry-screen__title {
  font-size: 1.3rem;
}

.manual-entry-screen__intro {
  color: var(--text-2);
}

.manual-entry-screen__form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 12px 0 16px;
}

.manual-entry-screen__form label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-2);
}

.required-mark {
  color: var(--red);
}

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

.input-with-clear input {
  width: 100%;
  min-height: var(--tap-min);
  padding: 12px 40px 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 1.1rem;
  letter-spacing: 1px;
}

.input-clear-button {
  position: absolute;
  right: 10px;
  display: none;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 999px;
  background: var(--border);
  color: var(--text-2);
}

.input-clear-button--visible {
  display: flex;
}

.field-hint {
  color: var(--text-3);
  font-size: 0.85rem;
  margin: 2px 0 8px;
}

/* Error screen (full-screen blocking error) */

.error-screen {
  text-align: center;
  margin-top: 6vh;
}

.error-screen__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 999px;
  background: var(--red-bg);
  color: var(--red);
  margin-bottom: 18px;
}

.error-screen__title {
  color: var(--red-dark);
  font-size: 1.3rem;
}

.error-screen__message {
  color: var(--text-2);
}

.error-screen__actions {
  margin-top: 10px;
  text-align: left;
}

/* Diagnostic screen */

.diagnostic-screen__imei {
  color: var(--text-2);
  margin-bottom: 16px;
}

.diagnostic-screen__cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.status-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.status-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.status-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  flex-shrink: 0;
}

.status-card__icon--ok {
  background: var(--green-bg);
  color: var(--green-dark);
}

.status-card__icon--pending {
  background: var(--amber-bg);
  color: var(--amber-dark);
}

.status-card__icon--error {
  background: var(--red-bg);
  color: var(--red-dark);
}

.status-card__title {
  flex: 1;
  font-size: 1rem;
  font-weight: 700;
}

.status-card__value {
  margin-top: 4px;
  font-size: 1.02rem;
}

.status-card__hint {
  margin-top: 4px;
  color: var(--text-2);
}

.status-card__meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  margin-bottom: 0;
  font-size: 0.85rem;
  color: var(--text-3);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.82rem;
}

.badge--ok {
  background: var(--green-bg);
  color: var(--green-dark);
}

.badge--pending {
  background: var(--amber-bg);
  color: var(--amber-dark);
}

.badge--error {
  background: var(--red-bg);
  color: var(--red-dark);
}

.refresh-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin: 20px 0;
  text-align: center;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.refresh-indicator__status {
  color: var(--text-3);
  font-size: 0.85rem;
  margin: 0;
}

.error-message {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: var(--red-bg);
  color: var(--red-dark);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 14px;
}

.installation-status {
  margin-top: 6px;
  background: var(--green-bg);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.installation-status__badge-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
  margin-bottom: 10px;
}

.installation-status__badge {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--green-dark);
  margin-bottom: 4px;
}

.installation-status__text {
  color: var(--text-2);
}

.installation-status__summary {
  text-align: left;
  margin: 16px 0;
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
}

.installation-status__summary-title {
  color: var(--text-2);
  font-size: 0.85rem;
  font-weight: 600;
  margin: 10px 0 4px;
}

.installation-status__row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.installation-status__row:first-of-type {
  border-top: none;
}

.installation-status__row-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: var(--green-bg);
  color: var(--green-dark);
  flex-shrink: 0;
  margin-top: 2px;
}

.installation-status__row-label {
  color: var(--text-2);
  font-size: 0.82rem;
  margin: 0 0 2px;
}

.installation-status__row-value {
  font-weight: 600;
  margin: 0;
}

.diagnostic-screen__loading {
  text-align: center;
  color: var(--text-2);
  margin-top: 20vh;
}