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

:root {
  --bg: #0a0e1a;
  --surface: #111827;
  --surface-2: #1f2937;
  --surface-3: #374151;
  --border: #374151;
  --text: #f3f4f6;
  --text-dim: #9ca3af;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.5);
  --green: #10b981;
  --green-glow: rgba(16, 185, 129, 0.4);
  --red: #ef4444;
}

body {
  font-family: 'SN Pro', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== App Layout ===== */
.app {
  display: flex;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 10;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
}

.logo__icon {
  font-size: 1.5rem;
}

.logo__text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.logo__accent {
  color: var(--accent);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.nav__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.9375rem;
  transition: all 0.15s;
}

.nav__item:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav__item--active {
  background: var(--accent);
  color: #fff;
}

.nav__item--active:hover {
  background: var(--accent);
  color: #fff;
}

.sidebar__footer {
  margin-top: auto;
}

.plan-card {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  border-radius: 12px;
  padding: 1rem;
}

.plan-card__label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.25rem;
}

.plan-card__name {
  font-size: 1.125rem;
  font-weight: 700;
}

.plan-card__exp {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 0.5rem;
}

/* ===== Main ===== */
.main {
  flex: 1;
  margin-left: 240px;
  padding: 0 2rem 2rem;
}

/* ===== Header ===== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.header__title {
  font-size: 1.5rem;
  font-weight: 700;
}

.header__user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.header__name {
  font-size: 0.9375rem;
  color: var(--text-dim);
}

/* ===== Content ===== */
.content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ===== Connect Card ===== */
.connect-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.connect-card__glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}

.connect-card--connected .connect-card__glow {
  background: radial-gradient(ellipse at center, var(--green-glow) 0%, transparent 70%);
  opacity: 1;
}

.connect-card--connecting .connect-card__glow {
  background: radial-gradient(ellipse at center, rgba(245, 158, 11, 0.4) 0%, transparent 70%);
  opacity: 1;
}

.connect-card__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2.5rem;
}

/* ===== Status ===== */
.status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.status__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--red);
}

.status__dot--connected {
  background: var(--green);
  box-shadow: 0 0 8px var(--green-glow);
}

.status__dot--connecting {
  background: #f59e0b;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status__text {
  font-size: 0.9375rem;
  color: var(--text-dim);
}

/* ===== Power Button ===== */
.power-btn {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--border);
  background: var(--surface-2);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  margin-bottom: 2rem;
}

.power-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.power-btn--active {
  border-color: var(--green);
  color: var(--green);
  box-shadow: 0 0 30px var(--green-glow);
}

.power-btn--connecting {
  border-color: #f59e0b;
  color: #f59e0b;
  animation: pulse 1s infinite;
}

.power-btn__icon {
  width: 48px;
  height: 48px;
}

/* ===== Info ===== */
.connect-card__info {
  display: flex;
  gap: 3rem;
}

.info-item {
  text-align: center;
}

.info-item__label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.375rem;
}

.info-item__value {
  font-size: 1.125rem;
  font-weight: 600;
}

/* ===== Stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.stat-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--surface-2);
}

.stat-card__icon--download { background: rgba(59, 130, 246, 0.2); }
.stat-card__icon--upload { background: rgba(16, 185, 129, 0.2); }
.stat-card__icon--ping { background: rgba(245, 158, 11, 0.2); }
.stat-card__icon--speed { background: rgba(168, 85, 247, 0.2); }

.stat-card__label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}

.stat-card__value {
  font-size: 1.125rem;
  font-weight: 700;
}

/* ===== Views (переключение экранов) ===== */
.view--hidden {
  display: none;
}

/* ===== Speed Test ===== */
.speed-test {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.speed-test__head {
  text-align: center;
}

.speed-test__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

.speed-test__hint {
  font-size: 0.875rem;
  color: var(--text-dim);
}

/* Прибор-спидометр */
.gauge {
  position: relative;
  width: min(320px, 90%);
}

.gauge__svg {
  display: block;
  width: 100%;
  height: auto;
}

.gauge__track {
  fill: none;
  stroke: var(--surface-3);
  stroke-width: 14;
  stroke-linecap: round;
}

.gauge__fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 456;
  stroke-dashoffset: 456;
  transition: stroke-dashoffset 0.12s linear, stroke 0.3s;
}

.gauge__ticks line {
  stroke: var(--surface-3);
  stroke-width: 2;
}

.gauge__ticks text {
  fill: var(--text-dim);
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
}

.gauge__center {
  position: absolute;
  left: 50%;
  bottom: 8%;
  transform: translateX(-50%);
  text-align: center;
  width: 70%;
}

.gauge__value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.75rem;
  font-weight: 600;
  line-height: 1;
}

.gauge__unit {
  font-size: 0.875rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.gauge__phase {
  margin-top: 0.625rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  min-height: 1.2em;
}

/* Кнопка теста */
.speed-test__btn {
  min-width: 220px;
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
}

.speed-test__btn:hover:not(:disabled) {
  background: #2563eb;
  box-shadow: 0 0 24px var(--accent-glow);
}

.speed-test__btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Результаты */
.speed-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  width: 100%;
}

.speed-result {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
}

.speed-result__icon {
  font-size: 1.375rem;
  margin-bottom: 0.375rem;
}

.speed-result__label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.speed-result__value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.75rem;
  font-weight: 600;
  margin-top: 0.25rem;
}

.speed-result__unit {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Оценка */
.speed-grade {
  width: 100%;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  min-height: 1.5em;
}

.speed-grade:empty {
  display: none;
}

/* История */
.speed-history {
  width: 100%;
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
}

.speed-history__title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

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

.speed-history__empty {
  font-size: 0.875rem;
  color: var(--text-dim);
}

.speed-history__row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
}

.speed-history__row .flag {
  font-size: 1.125rem;
}

.speed-history__row .when {
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
}

.speed-history__row .vals {
  margin-left: auto;
  font-family: 'JetBrains Mono', monospace;
}

/* ===== Settings ===== */
.settings {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
}

.settings__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.setting-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.setting-row__name {
  font-size: 0.9375rem;
  font-weight: 600;
}

.setting-row__desc {
  font-size: 0.8125rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.toggle {
  flex-shrink: 0;
  width: 48px;
  height: 26px;
  border-radius: 13px;
  border: none;
  background: var(--surface-3);
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
}

.toggle--on {
  background: var(--green);
}

.toggle--on::after {
  transform: translateX(22px);
}
.servers {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
}

.servers__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.servers__title {
  font-size: 1.125rem;
  font-weight: 700;
}

.servers__change {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.servers__change:hover {
  background: #2563eb;
}

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

.server-group__label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 1rem;
  padding: 0 0.25rem;
}

.server-group__label:first-child {
  margin-top: 0;
}

.server-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  background: var(--surface-2);
  border: 2px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.server-item:hover {
  border-color: var(--surface-3);
}

.server-item--active {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
}

.server-item__flag {
  font-size: 1.5rem;
}

.server-item__name {
  flex: 1;
  font-size: 0.9375rem;
  font-weight: 600;
  text-align: left;
}

.server-item__ping {
  font-size: 0.875rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

.server-item--active .server-item__ping {
  color: var(--accent);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .sidebar {
    display: none;
  }

  .main {
    margin-left: 0;
    padding: 0 1rem 1.5rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .connect-card__info {
    flex-direction: column;
    gap: 1.25rem;
  }
}