:root {
  color-scheme: dark;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --canvas: #141414;
  --surface: #1c1c1c;
  --surface-soft: #242424;
  --surface-hover: #2a2a2a;
  --border: #333;
  --border-strong: #4b4b4b;
  --text: #ededed;
  --text-secondary: #bdbdbd;
  --text-muted: #929292;
  --accent: #7757da;
  --accent-hover: #7d5edf;
  --accent-active: #7450dc;
  --accent-focus: #b9a3ff;
  --on-accent: #fff;
  --success: #95cdaa;
  --success-surface: #1d2922;
  --success-border: #355342;
  --danger: #f1a198;
  --danger-surface: #2b2020;
  --danger-border: #5e3936;
  --shadow: 0 22px 70px #0005;
  color: var(--text);
  background: var(--canvas);
}

:root[data-theme="light"] {
  color-scheme: light;
  --canvas: #fff;
  --surface: #fcfcfc;
  --surface-soft: #f3f3f3;
  --surface-hover: #ececec;
  --border: #e8e8e8;
  --border-strong: #c9c9c9;
  --text: #151515;
  --text-secondary: #555;
  --text-muted: #858585;
  --accent: #7450dc;
  --accent-hover: #6642c8;
  --accent-active: #5838b3;
  --accent-focus: #7450dc;
  --on-accent: #fff;
  --success: #3b7753;
  --success-surface: #eef8f1;
  --success-border: #cbe1d2;
  --danger: #ad5141;
  --danger-surface: #fff3f1;
  --danger-border: #eed0ca;
  --shadow: 0 22px 70px #16161614;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--canvas);
}

body {
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 50% 42%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 34rem),
    var(--canvas);
}

a,
button {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

button {
  color: inherit;
}

[hidden] {
  display: none !important;
}

.icon-library {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.site-header,
.site-footer {
  width: min(100%, 1240px);
  margin: 0 auto;
  padding-right: max(24px, env(safe-area-inset-right));
  padding-left: max(24px, env(safe-area-inset-left));
}

.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 20px;
  font-weight: 750;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.brand-spark {
  width: 18px;
  height: 22px;
  fill: currentColor;
}

.brand:focus-visible,
.telegram-button:focus-visible,
.secondary-button:focus-visible {
  outline: 2px solid var(--accent-focus);
  outline-offset: 3px;
}

.secure-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text-muted);
  font-size: 12px;
}

.secure-label svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.login-shell {
  width: 100%;
  display: grid;
  place-items: center;
  padding: 48px max(20px, env(safe-area-inset-right)) 64px max(20px, env(safe-area-inset-left));
}

.auth-card {
  position: relative;
  width: min(100%, 470px);
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.auth-visual {
  width: 58px;
  height: 58px;
  margin-bottom: 28px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--border));
  border-radius: 18px;
  color: var(--on-accent);
  background: var(--accent);
}

.auth-visual svg {
  grid-area: 1 / 1;
  width: 30px;
  height: 30px;
}

.telegram-symbol {
  fill: currentColor;
}

.success-symbol,
.error-symbol {
  display: none;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3;
}

.error-symbol circle {
  fill: currentColor;
  stroke: none;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.auth-copy h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(27px, 5vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.description {
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

.status-box {
  min-height: 48px;
  margin-top: 24px;
  padding: 13px 15px;
  display: none;
  align-items: center;
  gap: 11px;
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text-secondary);
  background: var(--surface-soft);
  font-size: 13px;
  line-height: 1.45;
}

.spinner {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  border: 2px solid color-mix(in srgb, var(--text-muted) 36%, transparent);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.auth-actions {
  margin-top: 26px;
  display: grid;
  gap: 10px;
}

.telegram-button,
.secondary-button {
  min-height: 52px;
  padding: 0 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  border-radius: 15px;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease, transform 150ms ease;
}

.telegram-button {
  border: 1px solid var(--accent);
  color: var(--on-accent);
  background: var(--accent);
}

.telegram-button > svg:first-child {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.button-arrow {
  width: 18px;
  height: 18px;
  margin-left: auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.telegram-button > span {
  margin-left: auto;
}

.telegram-button:hover {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
}

.telegram-button:active {
  border-color: var(--accent-active);
  background: var(--accent-active);
  transform: translateY(1px);
}

.telegram-button.is-disabled {
  cursor: wait;
  opacity: 0.52;
}

.secondary-button {
  width: 100%;
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: transparent;
  cursor: pointer;
}

.secondary-button:hover {
  border-color: var(--text-muted);
  background: var(--surface-hover);
}

.secondary-button:active {
  transform: translateY(1px);
}

.secondary-button:disabled {
  cursor: wait;
  opacity: 0.52;
}

.login-note {
  margin-top: 26px;
  padding-top: 22px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}

.login-note-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
}

.login-note p {
  margin: -1px 0 0;
  font-size: 12px;
  line-height: 1.55;
}

.site-footer {
  min-height: 62px;
  padding-top: 18px;
  padding-bottom: max(18px, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--text-muted);
  font-size: 11px;
}

.auth-card[data-state="loading"] .status-box,
.auth-card[data-state="exchanging"] .status-box,
.auth-card[data-state="error"] .status-box,
.auth-card[data-state="success"] .status-box:not(:has(#status-text:empty)) {
  display: flex;
}

.auth-card[data-state="exchanging"] .auth-visual {
  animation: soft-pulse 1.6s ease-in-out infinite;
}

.auth-card[data-state="success"] .auth-visual {
  border-color: var(--success-border);
  color: var(--success);
  background: var(--success-surface);
}

.auth-card[data-state="success"] .telegram-symbol,
.auth-card[data-state="success"] .error-symbol {
  display: none;
}

.auth-card[data-state="success"] .success-symbol {
  display: block;
}

.auth-card[data-state="success"] .spinner {
  display: none;
}

.auth-card[data-state="success"] .eyebrow {
  color: var(--success);
}

.auth-card[data-state="success"] .secondary-button {
  border-color: var(--accent);
  color: var(--on-accent);
  background: var(--accent);
}

.auth-card[data-state="success"] .secondary-button:hover {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
}

.auth-card[data-state="error"] .auth-visual {
  border-color: var(--danger-border);
  color: var(--danger);
  background: var(--danger-surface);
}

.auth-card[data-state="error"] .telegram-symbol,
.auth-card[data-state="error"] .success-symbol {
  display: none;
}

.auth-card[data-state="error"] .error-symbol {
  display: block;
}

.auth-card[data-state="error"] .status-box {
  border-color: var(--danger-border);
  color: var(--danger);
  background: var(--danger-surface);
}

.auth-card[data-state="error"] .spinner {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes soft-pulse {
  50% { transform: scale(0.96); }
}

@media (max-width: 560px) {
  .site-header,
  .site-footer {
    padding-right: max(16px, env(safe-area-inset-right));
    padding-left: max(16px, env(safe-area-inset-left));
  }

  .site-header {
    min-height: 64px;
  }

  .brand {
    font-size: 18px;
  }

  .brand-spark {
    width: 16px;
    height: 20px;
  }

  .secure-label {
    font-size: 0;
  }

  .secure-label svg {
    width: 19px;
    height: 19px;
  }

  .login-shell {
    place-items: start center;
    padding: 28px max(12px, env(safe-area-inset-right)) 36px max(12px, env(safe-area-inset-left));
  }

  .auth-card {
    padding: 26px 22px;
    border-radius: 22px;
  }

  .auth-visual {
    width: 52px;
    height: 52px;
    margin-bottom: 24px;
    border-radius: 16px;
  }

  .auth-copy h1 {
    font-size: 28px;
  }

  .description {
    font-size: 14px;
  }

  .site-footer {
    min-height: 56px;
    justify-content: center;
  }

  .site-footer > span:last-child {
    display: none;
  }
}

@media (max-height: 680px) and (min-width: 561px) {
  .login-shell {
    place-items: start center;
    padding-top: 20px;
    padding-bottom: 28px;
  }

  .auth-card {
    padding: 28px;
  }

  .auth-visual {
    margin-bottom: 20px;
  }

  .login-note {
    margin-top: 20px;
    padding-top: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}