/* Theme Tokens - Neumorphism Soft UI */
    :root {
      --accent: #00A59B;
      --success: #4E9F76;
      --danger: #D96A73;
      --warning: #D9A05B;
      --bot-accent: #7D73C8;
      --radius-sm: 10px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --font-sans: 'IBM Plex Sans', sans-serif;
      --font-mono: 'IBM Plex Mono', monospace;
      --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
      --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    [data-theme="dark"] {
      --bg: #1E222A;
      --text: #E2E8F0;
      --text-muted: #8291A8;
      --text-sub: #A0AABF;
      --shadow-light: #2A2F3A;
      --shadow-dark: #14171D;
      --terminal-bg: #16191F;
      --scrollbar: #2A2F3A;
      --outer-shadow: 6px 6px 14px var(--shadow-dark), -6px -6px 14px var(--shadow-light);
      --outer-shadow-sm: 3px 3px 8px var(--shadow-dark), -3px -3px 8px var(--shadow-light);
      --inner-shadow: inset 4px 4px 8px var(--shadow-dark), inset -4px -4px 8px var(--shadow-light);
      --inner-shadow-sm: inset 2px 2px 5px var(--shadow-dark), inset -2px -2px 5px var(--shadow-light);
    }

    [data-theme="light"] {
      --bg: #E6EAEF;
      --text: #334155;
      --text-muted: #64748B;
      --text-sub: #475569;
      --shadow-light: #FFFFFF;
      --shadow-dark: #C1C9D2;
      --terminal-bg: #DCE1E8;
      --scrollbar: #C1C9D2;
      --outer-shadow: 8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);
      --outer-shadow-sm: 4px 4px 8px var(--shadow-dark), -4px -4px 8px var(--shadow-light);
      --inner-shadow: inset 5px 5px 10px var(--shadow-dark), inset -5px -5px 10px var(--shadow-light);
      --inner-shadow-sm: inset 2px 2px 5px var(--shadow-dark), inset -2px -2px 5px var(--shadow-light);
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; scrollbar-gutter: stable; }
    body {
      touch-action: manipulation;
      font-family: var(--font-sans);
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      transition: background var(--transition-smooth), color var(--transition-smooth);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      width: 100%;
    }

    ::-webkit-scrollbar { width: 6px; height: 6px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 99px; }

    .app-wrap {
      max-width: 1080px;
      margin: 0 auto;
      padding: 24px 24px 120px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .login-screen {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--bg);
    }

    .fade-in-up {
      animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
      opacity: 0;
      transform: translateY(20px);
    }

    @keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

    .minimal-card {
      background: var(--bg);
      border-radius: var(--radius-xl);
      padding: 56px 48px;
      text-align: center;
      width: 90%;
      max-width: 380px;
      box-shadow: var(--outer-shadow);
    }

    .slate-logo { display: flex; justify-content: center; margin: 0 auto 24px; }
    .slate-logo img { height: 48px; width: auto; }
    .slate-title { font-size: 28px; font-weight: 800; color: var(--text); margin-bottom: 8px; }
    .slate-subtitle { font-size: 13px; color: var(--text-muted); font-weight: 500; margin-bottom: 32px; }
    .divider { height: 1px; background: rgba(148, 163, 184, 0.1); margin-bottom: 32px; width: 100%; }

    .slate-btn {
      width: 100%;
      background: var(--bg);
      color: var(--text);
      border: none;
      border-radius: var(--radius-sm);
      padding: 14px 16px;
      font-size: 13px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      box-shadow: var(--outer-shadow-sm);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }
    .slate-btn:active { transform: scale(0.96); box-shadow: var(--inner-shadow-sm); }
    .google-icon { width: 18px; height: 18px; }

    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--bg);
      border-radius: var(--radius-lg);
      padding: 16px 24px;
      box-shadow: var(--outer-shadow);
    }
    .nav-left { display: flex; align-items: center; gap: 16px; }
    .logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; }
    .logo img { height: 22px; width: auto; }

    [data-theme="dark"] .logo-light, [data-theme="dark"] .loader-light { display: none; }
    [data-theme="dark"] .logo-dark, [data-theme="dark"] .loader-dark { display: block; }
    [data-theme="light"] .logo-light, [data-theme="light"] .loader-light { display: block; }
    [data-theme="light"] .logo-dark, [data-theme="light"] .loader-dark { display: none; }

    .nav-right { display: flex; align-items: center; gap: 16px; }

    .switch-container {
      display: flex;
      background: var(--bg);
      border-radius: var(--radius-sm);
      padding: 6px;
      gap: 6px;
      box-shadow: var(--inner-shadow);
    }
    .switch-btn {
      flex: 1;
      padding: 10px 8px;
      font-size: 12px;
      font-weight: 700;
      text-align: center;
      border-radius: 6px;
      cursor: pointer;
      color: var(--text-muted);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
      user-select: none;
    }
    .switch-btn:active { transform: scale(0.95); }
    .switch-btn.active { background: var(--bg); color: var(--text); box-shadow: var(--outer-shadow-sm); }
    .switch-btn.active.up-side { background: var(--success); color: #FFFFFF; }
    .switch-btn.active.down-side { background: var(--danger); color: #FFFFFF; }

    button {
      font-family: var(--font-sans);
      border: none;
      border-radius: var(--radius-sm);
      font-weight: 700;
      cursor: pointer;
      font-size: 13px;
      padding: 12px 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--bg);
      box-shadow: var(--outer-shadow-sm);
      color: var(--text);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
      outline: none;
    }
    button:active:not(:disabled) { box-shadow: var(--inner-shadow-sm); transform: scale(0.96); }
    button:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }
    .btn-primary { color: var(--accent); }
    .btn-ghost { box-shadow: none; color: var(--text-muted); background: transparent; padding: 8px 12px; }
    .btn-outline { color: var(--text-muted); }
    .btn-danger { color: var(--danger); }
    .btn-sm { padding: 8px 16px; font-size: 12px; }

    .section-card {
      background: var(--bg);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--outer-shadow);
    }
    .tracker-panel {
      display: flex;
      flex-direction: column;
      background: var(--bg);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--inner-shadow);
      margin-bottom: 16px;
    }

    input[type="text"], input[type="number"] {
      font-family: var(--font-mono);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: none;
      background: var(--bg);
      box-shadow: var(--inner-shadow);
      color: var(--text);
      font-size: 13px;
      outline: none;
      width: 100%;
      transition: box-shadow var(--transition-fast), color var(--transition-fast);
    }

    .input-error {
      box-shadow: 0 0 0 1.5px var(--danger), var(--inner-shadow) !important;
      color: var(--danger) !important;
    }

    .hidden { display: none !important; }

    /* Giant Time Counter */
    .giant-counter {
      font-size: 64px;
      font-family: var(--font-mono);
      font-weight: 700;
      text-align: center;
      letter-spacing: -2px;
      margin: 16px 0 32px;
      text-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    /* Supersized Headers & Prices */
    .hero-header {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.05em;
      margin-bottom: 24px;
    }
    .hero-price {
      font-size: 36px;
      font-weight: 700;
      font-family: var(--font-mono);
      padding: 8px 24px;
      border-radius: 99px;
      background: var(--bg);
      box-shadow: var(--inner-shadow);
    }

    /* Taller Stats Bar */
    .sim-summary-bar {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
      background: var(--bg);
      box-shadow: var(--inner-shadow);
      border-radius: var(--radius-md);
      padding: 16px 24px;
      margin-bottom: 24px;
      position: relative;
      overflow: hidden;
    }
    .sim-summary-item { display: flex; flex-direction: column; gap: 8px; position: relative; z-index: 2; }
    .sim-summary-label { font-size: 12px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; }
    .sim-summary-value { font-size: 24px; font-weight: 700; font-family: var(--font-mono); color: var(--text); }

    @media (max-width: 900px) { .sim-summary-bar { grid-template-columns: repeat(3, 1fr); padding: 24px; } }
    @media (max-width: 600px) { .sim-summary-bar { grid-template-columns: repeat(2, 1fr); padding: 20px; } }

    /* Always-on Log */
    .sim-log-container {
      background: var(--terminal-bg);
      box-shadow: var(--inner-shadow);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      height: 250px;
      overflow-y: auto;
      font-family: var(--font-mono);
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.8;
      margin-top: 12px;
    }

    /* Pro Banner */
    .pro-banner {
      background: rgba(0, 165, 155, 0.08);
      border: 1px dashed var(--accent);
      border-radius: var(--radius-md);
      padding: 16px 24px;
      margin-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      margin-bottom: 8px;
    }
    .pro-banner-text {
      font-size: 13px;
      font-weight: 600;
      color: var(--text);
      line-height: 1.5;
    }
    .pro-banner-btn {
      background: var(--accent);
      color: #FFFFFF;
      border: none;
      border-radius: 99px;
      padding: 10px 24px;
      font-size: 12px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(0, 165, 155, 0.3);
      white-space: nowrap;
      transition: transform var(--transition-fast);
    }
    .pro-banner-btn:active { transform: scale(0.96); }
    @media (max-width: 600px) {
      .pro-banner { flex-direction: column; text-align: center; padding: 16px; }
      .pro-banner-btn { width: 100%; }
    }
    .sim-control-btn {
      width: 100%;
      height: 64px;
      font-size: 18px;
      font-weight: 800;
      letter-spacing: 0.05em;
      border-radius: var(--radius-md);
      margin-top: 16px;
      transition: all 0.15s ease;
    }
    .sim-control-btn.running { background: var(--danger); color: #FFF; box-shadow: 0 8px 16px rgba(217,106,115,0.2); }
    .sim-control-btn.stopped { background: var(--accent); color: #FFF; box-shadow: 0 8px 16px rgba(0,165,155,0.2); }
    .sim-control-btn:active { transform: scale(0.98); }

    /* Custom Confirm Modal */
    .custom-modal-backdrop {
      position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
      background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
      z-index: 100000; display: flex; align-items: center; justify-content: center;
      opacity: 0; visibility: hidden; transition: opacity 0.3s ease;
    }
    .custom-modal-backdrop.show { opacity: 1; visibility: visible; }
    .custom-modal-box {
      background: var(--bg); border-radius: var(--radius-lg); padding: 48px 40px;
      width: 90%; max-width: 480px; box-shadow: var(--outer-shadow);
      transform: translateY(20px); transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      text-align: center;
    }
    .custom-modal-backdrop.show .custom-modal-box { transform: translateY(0); }

    /* Toast */
    .toast-container { position: fixed; bottom: 32px; right: 32px; z-index: 999999; display: flex; flex-direction: column; gap: 12px; pointer-events: none; }
    .toast { background: var(--bg); color: var(--text); box-shadow: var(--outer-shadow); padding: 16px 20px; border-radius: var(--radius-md); font-size: 13px; font-weight: 600; font-family: var(--font-sans); display: flex; align-items: center; gap: 12px; min-width: 250px; transform: translateX(120%); transition: transform var(--transition-smooth), opacity var(--transition-smooth); opacity: 0; pointer-events: auto; border-left: 4px solid transparent; }
    .toast.show { transform: translateX(0); opacity: 1; }
    .toast.success { border-left-color: var(--success); }
    .toast.error { border-left-color: var(--danger); }
    .toast.info { border-left-color: var(--bot-accent); }

    .grecaptcha-badge { visibility: hidden !important; }

    /* Hamburger & Popup */
    .hamburger-btn { width: 20px; height: 10px; position: relative; cursor: pointer; display: flex; flex-direction: column; justify-content: space-between; margin-left: 8px; z-index: 10001; }
    .hamburger-btn::after { content: ''; position: absolute; top: -16px; bottom: -16px; left: -16px; right: -16px; }
    .hamburger-btn span { display: block; width: 100%; height: 2px; background: var(--text-muted); border-radius: 2px; }
    .backdrop { visibility: hidden; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0, 0, 0, 0.4); backdrop-filter: blur(4px); z-index: 9999; opacity: 0; transition: opacity 0.3s ease; }
    .backdrop.show { visibility: visible; opacity: 1; }
    #hamburger-menu-popup { display: none; position: absolute; top: 56px; right: 24px; background: var(--bg); padding: 24px 20px; border-radius: var(--radius-lg); box-shadow: var(--outer-shadow); z-index: 10000; width: 280px; border: 1px solid rgba(148, 163, 184, 0.1); }

    .user-profile-section { display: flex; align-items: center; gap: 12px; padding-bottom: 20px; border-bottom: 1px solid rgba(148,163,184,0.12); margin-bottom: 20px; }
    .user-profile-pic { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; box-shadow: var(--outer-shadow-sm); }
    .user-profile-email { font-size: 13px; font-weight: 600; color: var(--text); word-break: break-all; }

    @media (max-width: 600px) {
      .app-wrap { padding: 12px 12px 100px; }
      .section-card { padding: 20px 16px; border-radius: var(--radius-md); }
      .tracker-panel { padding: 16px 12px; margin-bottom: 12px; }
      .panel-header-up { order: 99; margin-top: 16px; margin-bottom: 8px !important; flex-direction: row; }
      .panel-header-down { flex-direction: row-reverse; }
      .sim-summary-bar { padding: 16px !important; gap: 12px !important; }
      .giant-counter { font-size: 48px; }
      .hero-price { font-size: 28px; padding: 6px 16px; }
      #hamburger-menu-popup, #sim-config-popup, .custom-modal-box { position: fixed !important; top: auto !important; bottom: 0 !important; left: 0 !important; right: 0 !important; width: 100% !important; max-width: 100% !important; border-radius: var(--radius-xl) var(--radius-xl) 0 0 !important; transform: translateY(100%) !important; transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1) !important; box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.25) !important; margin: 0 !important; }
      #hamburger-menu-popup, #sim-config-popup { padding: 28px 24px max(24px, env(safe-area-inset-bottom)) !important; }
      .custom-modal-box { padding: 48px 24px max(40px, env(safe-area-inset-bottom)) !important; }
      #hamburger-menu-popup.slide-up, #sim-config-popup.slide-up, .custom-modal-backdrop.show .custom-modal-box { transform: translateY(0) !important; }
      #hamburger-menu-popup::before, #sim-config-popup::before, .custom-modal-box::before { content: ''; position: absolute; top: 10px; left: 50%; transform: translateX(-50%); width: 36px; height: 5px; border-radius: 3px; background: rgba(148, 163, 184, 0.25); }
      .custom-modal-backdrop { align-items: flex-end; padding: 0; }
    }
    /* Accordion UI for How It Works & FAQ */
    .info-container {
      width: 100%;
      max-width: 800px;
      margin: 24px auto 0;
    }
    details.neumorph-accordion {
      background: var(--bg);
      border-radius: var(--radius-md);
      box-shadow: var(--outer-shadow);
      margin-bottom: 16px;
      overflow: hidden;
      transition: box-shadow var(--transition-fast);
    }
    details.neumorph-accordion summary {
      padding: 16px 24px;
      font-size: 14px;
      font-weight: 700;
      color: var(--text);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    details.neumorph-accordion summary::-webkit-details-marker {
      display: none;
    }
    details.neumorph-accordion summary::after {
      content: '+';
      font-size: 20px;
      color: var(--accent);
      font-weight: 400;
      transition: transform 0.3s ease;
    }
    details.neumorph-accordion[open] summary::after {
      content: '−';
      transform: rotate(180deg);
    }
    details.neumorph-accordion[open] summary {
      box-shadow: var(--inner-shadow-sm);
      border-bottom: 1px solid rgba(148,163,184,0.1);
    }
    .accordion-content {
      padding: 20px 24px;
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      background: var(--bg);
    }
    .accordion-content ul, .accordion-content ol {
      padding-left: 20px;
      margin-top: 8px;
      margin-bottom: 8px;
    }
    .accordion-content li {
      margin-bottom: 8px;
    }