:root {
      color-scheme: light;
      --font-family-body: "IBM Plex Sans", "Segoe UI", sans-serif;

      --page-bg-image: url('../images/bg1.jpg');
      --page-bg-overlay-start: rgba(244, 247, 251, 0.52);
      --page-bg-overlay-end: rgba(244, 247, 251, 0.82);

      --surface-main: #ffffff;
      --surface-soft: #f9fafb;

      --border-subtle: #e5e7eb;
      --border-strong: #d1d5db;

      --accent: #2563eb;
      --accent-dark: #1d4ed8;

      --text-main: #111827;
      --text-muted: #6b7280;
      --text-soft: #9ca3af;
      --text-on-accent: #ffffff;

      --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.12);

      --radius-card: 16px;
      --radius-pill: 999px;

      --transition-fast: 150ms ease-out;
      --transition-normal: 220ms ease-out;
      --transition-slow: 260ms cubic-bezier(0.24, 0.8, 0.24, 1);
    }

    body[data-theme="dark"] {
      color-scheme: dark;
      --page-bg-overlay-start: rgba(2, 6, 23, 0.62);
      --page-bg-overlay-end: rgba(2, 6, 23, 0.88);

      --surface-main: rgba(15, 23, 42, 0.86);
      --surface-soft: rgba(17, 24, 39, 0.86);

      --border-subtle: rgba(55, 65, 81, 0.8);
      --border-strong: rgba(75, 85, 99, 0.95);

      --accent: #60a5fa;
      --accent-dark: #3b82f6;

      --text-main: #e5e7eb;
      --text-muted: #a1a1aa;
      --text-soft: #71717a;

      --shadow-soft: 0 18px 55px rgba(0, 0, 0, 0.52);
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html,
    body {
      margin: 0;
      padding: 0;
      height: 100%;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    body {
      font-family: var(--font-family-body);
      background: #f3f4f6;
      color: var(--text-main);
    }

    body[data-theme="dark"] {
      background: #020617;
    }

    body.no-scroll {
      overflow: hidden;
      touch-action: none;
    }

    .app {
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: stretch;
      padding-top: env(safe-area-inset-top, 0);
      padding-bottom: env(safe-area-inset-bottom, 0);
      position: relative;
      isolation: isolate;
    }

    .app__bg {
      position: fixed;
      inset: -20vh;
      pointer-events: none;
      z-index: -2;
      background:
        linear-gradient(180deg, var(--page-bg-overlay-start), var(--page-bg-overlay-end)),
        var(--page-bg-image);
      background-size: cover;
      background-position: center top;
      background-repeat: no-repeat;
      transform: translateZ(0);
    }

    .app__bg::after {
      content: "";
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.16), transparent 55%),
        radial-gradient(circle at 100% 100%, rgba(14, 165, 233, 0.12), transparent 55%);
      opacity: 0.9;
    }

    body[data-theme="dark"] .app__bg::after {
      opacity: 0.55;
    }

    .app__shell {
      flex: 1;
      max-width: 520px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .header {
      position: sticky;
      top: 0;
      z-index: 3;
      padding: 10px 16px 8px;
      background: rgba(243, 244, 246, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(209, 213, 219, 0.9);
    }

    body[data-theme="dark"] .header {
      background: rgba(2, 6, 23, 0.72);
      border-bottom-color: rgba(55, 65, 81, 0.8);
    }

    .header__bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .header__content {
      display: flex;
      flex-direction: column;
      gap: 2px;
      min-width: 0;
    }

    .header__title {
      margin: 0;
      font-size: 18px;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .header__subtitle {
      margin: 0;
      font-size: 11px;
      color: var(--text-muted);
    }

    .header__actions {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      flex-shrink: 0;
    }

    .theme-toggle__icon {
      position: absolute;
      inset: 0;
      margin: auto;
      width: 18px;
      height: 18px;
      display: block;
      opacity: 0;
      transition: opacity var(--transition-fast), transform var(--transition-fast);
    }

    .theme-toggle__icon--sun {
      opacity: 1;
    }

    body[data-theme="dark"] .theme-toggle__icon--sun {
      opacity: 0;
    }

    body[data-theme="dark"] .theme-toggle__icon--moon {
      opacity: 1;
    }

    .icon-button {
      position: relative;
      width: 38px;
      height: 38px;
      border-radius: 12px;
      border: 1px solid rgba(209, 213, 219, 0.9);
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(8px);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      cursor: pointer;
      -webkit-tap-highlight-color: transparent;
      transition:
        transform var(--transition-fast),
        background var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
    }

    body[data-theme="dark"] .icon-button {
      border-color: rgba(55, 65, 81, 0.8);
      background: rgba(15, 23, 42, 0.72);
      color: var(--text-main);
    }

    .icon-button__svg {
      width: 18px;
      height: 18px;
      display: block;
    }

    .icon-button:active {
      transform: translateY(1px) scale(0.985);
      background: rgba(255, 255, 255, 0.95);
      border-color: rgba(37, 99, 235, 0.5);
      box-shadow: 0 10px 26px rgba(15, 23, 42, 0.14);
    }

    .icon-button:focus-visible {
      outline: none;
      box-shadow:
        0 0 0 2px #ffffff,
        0 0 0 4px rgba(37, 99, 235, 0.8);
    }

    .main {
      flex: 1;
      padding: 4px 0 24px;
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
    }

    .hero {
      padding: 12px 16px 8px;
    }

    .hero__panel {
      position: relative;
      overflow: hidden;
      border-radius: 18px;
      border: 1px solid rgba(209, 213, 219, 0.7);
      background: rgba(255, 255, 255, 0.82);
      box-shadow: var(--shadow-soft);
      padding: 16px 14px 14px;
      color: var(--text-main);
    }

    body[data-theme="dark"] .hero__panel {
      border-color: rgba(55, 65, 81, 0.8);
      background: rgba(15, 23, 42, 0.72);
    }

    .hero__panel::after {
      content: "";
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 20% 0, rgba(37, 99, 235, 0.18), transparent 60%),
        radial-gradient(circle at 100% 100%, rgba(14, 165, 233, 0.10), transparent 55%);
      pointer-events: none;
    }

    .hero__inner {
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .hero__kicker {
      margin: 0;
      font-size: 11px;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--text-muted);
    }

    .hero__title {
      margin: 0;
      font-size: 18px;
      font-weight: 650;
      letter-spacing: 0.02em;
    }

    .hero__text {
      margin: 0;
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.35;
      max-width: 42ch;
    }

    .rates {
      display: flex;
      flex-direction: column;
      gap: 10px;
      padding: 6px 16px 24px;
    }

    .rates__hint {
      font-size: 11px;
      color: var(--text-soft);
      margin: 2px 2px 8px;
    }

    .rate-card {
      position: relative;
      border-radius: var(--radius-card);
      padding: 12px 14px 12px;
      background: var(--surface-main);
      border: 1px solid var(--border-subtle);
      box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
      display: flex;
      flex-direction: column;
      gap: 10px;
      opacity: 0;
      transform: translateY(8px);
      animation: card-in 0.35s var(--transition-slow) forwards;
      animation-delay: calc(0.03s * var(--card-index, 1));
    }

    .rate-card__header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    .rate-card__info {
      display: flex;
      flex: 1;
      min-width: 0;
      align-items: center;
      gap: 10px;
    }

    .rate-card__flag {
      width: 22px;
      height: 16px;
      flex-shrink: 0;
      border-radius: 3px;
      object-fit: cover;
      filter: drop-shadow(0 1px 2px rgba(15, 23, 42, 0.22));
    }

    .rate-card__text {
      display: flex;
      flex-direction: column;
      gap: 2px;
      min-width: 0;
    }

    .rate-card__pair {
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--text-main);
    }

    .rate-card__name {
      font-size: 12px;
      color: var(--text-muted);
      white-space: nowrap;
      text-overflow: ellipsis;
      overflow: hidden;
    }

    .rate-card__body {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      gap: 12px;
      padding-top: 4px;
    }

    .rate-card__column {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .rate-card__label {
      font-size: 11px;
      color: var(--text-soft);
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    .rate-card__value {
      font-size: 18px;
      font-weight: 650;
      letter-spacing: 0.02em;
      color: var(--text-main);
    }

    .rate-card__value--sell {
      color: #15803d;
    }

    .rate-card__divider {
      width: 1px;
      align-self: stretch;
      background: linear-gradient(
        to bottom,
        rgba(209, 213, 219, 0),
        rgba(209, 213, 219, 0.9),
        rgba(209, 213, 219, 0)
      );
    }

    @keyframes card-in {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (hover: hover) and (pointer: fine) {
      .rate-card {
        transition:
          transform var(--transition-normal),
          box-shadow var(--transition-normal),
          border-color var(--transition-normal);
      }

      .rate-card:hover {
        transform: translateY(-1px);
        box-shadow: 0 20px 50px rgba(15, 23, 42, 0.12);
        border-color: var(--border-strong);
      }
    }

    .rate-card:active {
      transform: translateY(1px);
      box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
    }

    .backdrop {
      position: fixed;
      inset: 0;
      background: rgba(15, 23, 42, 0.28);
      backdrop-filter: blur(4px);
      opacity: 0;
      pointer-events: none;
      transition: opacity var(--transition-normal);
      z-index: 20;
    }

    .backdrop--visible {
      opacity: 1;
      pointer-events: auto;
    }

    .call-dialog {
      position: fixed;
      left: 50%;
      bottom: 0;
      transform: translate(-50%, 100%);
      width: min(520px, 100% - 24px);
      margin-bottom: env(safe-area-inset-bottom, 8px);
      background: var(--surface-main);
      border-radius: 18px 18px 16px 16px;
      border: 1px solid rgba(209, 213, 219, 0.9);
      box-shadow: 0 22px 55px rgba(15, 23, 42, 0.45);
      padding: 10px 14px 12px;
      z-index: 21;
      opacity: 0;
      transition:
        transform var(--transition-slow),
        opacity var(--transition-slow);
      overflow: hidden;
    }

    .call-dialog__inner {
      position: relative;
      z-index: 1;
    }

    .call-dialog--visible {
      transform: translate(-50%, 0);
      opacity: 1;
    }

    .call-dialog__handle {
      width: 38px;
      height: 4px;
      border-radius: 999px;
      background: rgba(156, 163, 175, 0.9);
      margin: 4px auto 10px;
    }

    .call-dialog__header {
      display: flex;
      flex-direction: column;
      gap: 4px;
      padding: 0 4px 4px;
    }

    .call-dialog__title {
      margin: 0;
      font-size: 15px;
      font-weight: 600;
      text-align: center;
    }

    .call-dialog__subtitle {
      margin: 0;
      font-size: 12px;
      color: var(--text-muted);
      text-align: center;
    }

    .call-dialog__list {
      margin-top: 10px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .call-option {
      position: relative;
      display: flex;
      flex-direction: column;
      padding: 10px 12px;
      border-radius: 14px;
      text-decoration: none;
      color: inherit;
      background: var(--surface-soft);
      border: 1px solid var(--border-subtle);
      box-shadow: 0 10px 25px rgba(15, 23, 42, 0.06);
      transform: translateZ(0);
      will-change: transform;
      transition:
        transform 160ms cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow var(--transition-normal),
        border-color var(--transition-normal),
        background var(--transition-normal);
    }

    .call-option__label {
      font-size: 14px;
      font-weight: 600;
      letter-spacing: 0.02em;
    }

    .call-option__hint {
      font-size: 11px;
      color: var(--text-soft);
      margin-top: 2px;
    }

    .call-option__icon {
      position: absolute;
      right: 10px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 14px;
      color: var(--text-soft);
      transition: transform var(--transition-fast), color var(--transition-fast);
    }

    .call-option:active {
      transform: scale(0.99) translateY(1px);
      box-shadow: 0 8px 20px rgba(15, 23, 42, 0.18);
      background: #eff6ff;
      border-color: rgba(37, 99, 235, 0.4);
    }

    .call-option:active .call-option__icon {
      transform: translateY(-50%) translateX(4px);
      color: var(--text-main);
    }

    .call-option:focus-visible {
      outline: 2px solid rgba(37, 99, 235, 0.45);
      outline-offset: 2px;
    }

    @media (hover: hover) and (pointer: fine) {
      .call-option:hover {
        border-color: rgba(37, 99, 235, 0.6);
        box-shadow: 0 12px 28px rgba(15, 23, 42, 0.16);
        background: #f3f6ff;
      }

      .call-option:hover .call-option__icon {
        transform: translateY(-50%) translateX(4px);
        color: var(--text-main);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .call-option,
      .call-option__icon {
        transition: none;
      }
    }

    .call-dialog__cancel {
      width: 100%;
      margin-top: 10px;
      padding: 9px 12px 10px;
      border-radius: 14px;
      border: 0;
      background: transparent;
      color: var(--text-muted);
      font-size: 13px;
      font-weight: 500;
      cursor: pointer;
      -webkit-tap-highlight-color: transparent;
      transition: background var(--transition-fast), color var(--transition-fast);
    }

    .call-dialog__cancel:active {
      background: rgba(229, 231, 235, 0.6);
      color: var(--text-main);
    }

    @media (min-width: 768px) {
      .header {
        padding-inline: 24px;
      }

      .hero {
        padding-inline: 24px;
      }

      .rates {
        padding-inline: 24px;
      }

      .call-dialog {
        width: min(420px, 100% - 40px);
      }
    }