:root {
      --clr-bg: #060a1a;
      --clr-surface: rgba(14, 20, 42, 0.72);
      --clr-surface-hover: rgba(30, 40, 70, 0.75);
      --clr-border: rgba(255,255,255,0.07);
      --clr-border-hover: rgba(99,102,241,0.4);
      --clr-accent: #6366f1;
      --clr-accent2: #a78bfa;
      --clr-pink: #ec4899;
      --clr-text: #e2e8f0;
      --clr-text-muted: #64748b;
      --clr-text-dim: #3e4a6e;
      --radius: 18px;
      --blur: blur(24px);
    }

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

    html { scroll-behavior: smooth; }

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

    /* ─── Ambient Background ─── */
    .ambient {
      position: fixed; inset: 0; z-index: 0; pointer-events: none;
    }
    .ambient::before {
      content: '';
      position: absolute; inset: 0;
      background:
        radial-gradient(ellipse 80% 60% at 15% 20%, rgba(99,102,241,0.18) 0%, transparent 65%),
        radial-gradient(ellipse 70% 50% at 85% 75%, rgba(168,85,247,0.14) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 55% 45%, rgba(236,72,153,0.07) 0%, transparent 55%);
    }
    /* Subtle grain */
    .ambient::after {
      content: '';
      position: absolute; inset: 0;
      opacity: 0.025;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
      background-size: 256px 256px;
    }

    .content { position: relative; z-index: 1; }

    /* ─── Glassmorphism ─── */
    .glass {
      background: var(--clr-surface);
      backdrop-filter: var(--blur);
      -webkit-backdrop-filter: var(--blur);
      border: 1px solid var(--clr-border);
    }
    .glass-bright {
      background: rgba(22, 30, 58, 0.78);
      backdrop-filter: var(--blur);
      -webkit-backdrop-filter: var(--blur);
      border: 1px solid var(--clr-border);
    }

    /* ─── Typography ─── */
    .font-display { font-family: 'Syne', sans-serif; }
    .font-mono { font-family: 'JetBrains Mono', monospace; }

    /* ─── Gradient Text ─── */
    .grad-text {
      background: linear-gradient(135deg, #818cf8 0%, #a78bfa 40%, #c084fc 70%, #f472b6 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* ─── Hero / Top Bar ─── */
    .hero {
      padding: 28px 20px 20px;
      text-align: center;
    }
    .hero-logo {
      display: inline-flex; align-items: center; gap: 14px; margin-bottom: 10px;
    }
    .hero-icon {
      width: 52px; height: 52px;
      border-radius: 16px;
      background: linear-gradient(135deg, var(--clr-accent), #a78bfa, var(--clr-pink));
      display: flex; align-items: center; justify-content: center;
      box-shadow: 0 8px 32px rgba(99,102,241,0.35);
      position: relative;
    }
    .hero-icon svg { width: 26px; height: 26px; color: #fff; }
    .hero-title { font-family: 'Syne', sans-serif; font-size: 2.1rem; font-weight: 800; letter-spacing: -0.02em; }
    .hero-sub { color: var(--clr-text-muted); font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; margin-top: 2px; }

    /* ─── Input Row ─── */
    .input-wrap {
      display: flex; flex-direction: column; gap: 10px;
      padding: 0 16px;
      max-width: 680px; margin: 0 auto;
    }
    .input-group {
      display: flex; align-items: stretch;
      border-radius: 14px;
      overflow: hidden;
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--clr-border);
      transition: border-color .3s, box-shadow .3s;
    }
    .input-group:focus-within {
      border-color: var(--clr-accent);
      box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
    }
    .input-group input {
      flex: 1; min-width: 0;
      background: transparent; border: none; outline: none;
      color: #fff; font-size: 0.92rem; padding: 14px 16px;
      font-family: 'Outfit', sans-serif;
    }
    .input-group input::placeholder { color: var(--clr-text-dim); }
    .input-suffix {
      display: flex; align-items: center; padding: 0 14px;
      background: rgba(99,102,241,0.08);
      border-left: 1px solid var(--clr-border);
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.75rem; color: var(--clr-accent2); font-weight: 500;
      white-space: nowrap;
    }

    .btn-create {
      width: 100%;
      padding: 14px 24px;
      border: none; border-radius: 14px;
      background: linear-gradient(135deg, var(--clr-accent) 0%, #a78bfa 50%, var(--clr-pink) 100%);
      background-size: 200% 100%;
      background-position: 0% 50%;
      color: #fff; font-size: 0.92rem; font-weight: 600;
      cursor: pointer;
      display: flex; align-items: center; justify-content: center; gap: 8px;
      position: relative; overflow: hidden;
      transition: transform .2s, box-shadow .3s, background-position .5s;
      box-shadow: 0 6px 24px rgba(99,102,241,0.3);
      letter-spacing: 0.02em;
    }
    .btn-create:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 36px rgba(99,102,241,0.45);
      background-position: 100% 50%;
    }
    .btn-create:active { transform: translateY(0); }
    .btn-create svg { width: 18px; height: 18px; }

    /* ─── Email Badge ─── */
    .email-badge-wrap {
      max-width: 680px; margin: 18px auto 0; padding: 0 16px;
      display: none;
    }
    .email-badge-wrap.visible { display: block; animation: fadeSlideUp .4s ease; }
    .email-badge {
      display: flex; align-items: center; justify-content: space-between;
      background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(168,85,247,0.08) 100%);
      border: 1px solid rgba(99,102,241,0.25);
      border-radius: 14px; padding: 14px 16px; gap: 12px;
    }
    .email-badge-left { min-width: 0; }
    .email-badge-label { font-size: 0.65rem; color: var(--clr-text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 3px; }
    .email-badge-addr { font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; color: #fff; font-weight: 500; word-break: break-all; }
    .email-badge-actions { display: flex; gap: 6px; flex-shrink: 0; }
    .icon-btn {
      width: 36px; height: 36px; border-radius: 10px;
      background: rgba(255,255,255,0.06); border: 1px solid var(--clr-border);
      display: flex; align-items: center; justify-content: center;
      cursor: pointer; transition: background .2s, transform .15s;
      color: var(--clr-text-muted);
    }
    .icon-btn:hover { background: rgba(255,255,255,0.12); color: #fff; }
    .icon-btn:active { transform: scale(0.92); }
    .icon-btn svg { width: 16px; height: 16px; }
    .icon-btn.danger:hover { background: rgba(239,68,68,0.15); color: #f87171; border-color: rgba(239,68,68,0.3); }

    /* ─── Stats Strip ─── */
    .stats-strip {
      max-width: 680px; margin: 16px auto 0; padding: 0 16px;
      display: none;
    }
    .stats-strip.visible { display: flex; gap: 8px; animation: fadeSlideUp .45s .1s ease both; }
    .stat-pill {
      flex: 1; min-width: 0;
      background: rgba(255,255,255,0.035);
      border: 1px solid var(--clr-border);
      border-radius: 12px; padding: 10px 12px;
      display: flex; align-items: center; gap: 9px;
      transition: background .25s, transform .2s;
    }
    .stat-pill:hover { background: rgba(255,255,255,0.06); transform: translateY(-2px); }
    .stat-icon {
      width: 32px; height: 32px; border-radius: 9px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
    }
    .stat-icon svg { width: 15px; height: 15px; }
    .si-blue { background: rgba(99,102,241,0.15); color: #818cf8; }
    .si-green { background: rgba(34,197,94,0.15); color: #4ade80; }
    .si-purple { background: rgba(168,85,247,0.15); color: #c084fc; }
    .si-pink { background: rgba(236,72,153,0.15); color: #f472b6; }
    .stat-val { font-size: 0.95rem; font-weight: 600; color: #fff; line-height: 1.1; }
    .stat-lbl { font-size: 0.6rem; color: var(--clr-text-muted); text-transform: uppercase; letter-spacing: 0.04em; }

    /* ─── Main Split ─── */
    .main-split {
      max-width: 1100px; margin: 24px auto 0; padding: 0 16px;
      display: flex; flex-direction: column; gap: 14px;
    }
    @media (min-width: 720px) {
      .main-split { flex-direction: row; }
      .panel-list { flex: 0 0 340px; }
      .panel-preview { flex: 1; }
    }
    @media (min-width: 1024px) {
      .panel-list { flex: 0 0 380px; }
    }

    /* ─── Panels ─── */
    .panel {
      border-radius: var(--radius);
      overflow: hidden;
      display: flex; flex-direction: column;
    }
    .panel-head {
      display: flex; align-items: center; justify-content: space-between;
      padding: 14px 16px;
      border-bottom: 1px solid var(--clr-border);
    }
    .panel-head-left { display: flex; align-items: center; gap: 9px; }
    .panel-head-left svg { width: 18px; height: 18px; color: var(--clr-accent2); }
    .panel-head-title { font-size: 0.82rem; font-weight: 600; color: #fff; letter-spacing: 0.02em; }
    .count-badge {
      font-size: 0.62rem; font-weight: 600;
      background: rgba(99,102,241,0.2); color: var(--clr-accent2);
      padding: 2px 8px; border-radius: 20px;
      min-width: 22px; text-align: center;
    }
    .refresh-btn {
      width: 32px; height: 32px; border-radius: 8px;
      background: transparent; border: 1px solid var(--clr-border);
      display: flex; align-items: center; justify-content: center;
      cursor: pointer; color: var(--clr-text-muted);
      transition: all .2s;
    }
    .refresh-btn:hover { background: rgba(255,255,255,0.07); color: #fff; border-color: var(--clr-border-hover); }
    .refresh-btn:active { transform: rotate(180deg); }
    .refresh-btn svg { width: 15px; height: 15px; }

    /* ─── Email List ─── */
    .email-scroll { overflow-y: auto; max-height: 420px; }
    @media (min-width: 720px) { .email-scroll { max-height: 520px; } }
    .email-scroll::-webkit-scrollbar { width: 5px; }
    .email-scroll::-webkit-scrollbar-track { background: transparent; }
    .email-scroll::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.25); border-radius: 3px; }

    .email-item {
      display: flex; align-items: flex-start; gap: 12px;
      padding: 13px 15px;
      border-bottom: 1px solid rgba(255,255,255,0.04);
      cursor: pointer;
      transition: background .2s, border-left .2s;
      position: relative;
      border-left: 3px solid transparent;
    }
    .email-item:last-child { border-bottom: none; }
    .email-item:hover { background: rgba(99,102,241,0.06); }
    .email-item.active {
      background: rgba(99,102,241,0.1);
      border-left-color: var(--clr-accent);
    }
    .email-avatar {
      width: 40px; height: 40px; border-radius: 11px;
      display: flex; align-items: center; justify-content: center;
      font-weight: 700; font-size: 0.88rem; color: #fff;
      flex-shrink: 0; letter-spacing: -0.02em;
    }
    .email-meta { flex: 1; min-width: 0; }
    .email-from { font-size: 0.78rem; font-weight: 600; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .email-subj { font-size: 0.72rem; color: var(--clr-text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
    .email-from-addr { font-family: 'JetBrains Mono', monospace; font-size: 0.6rem; color: var(--clr-text-dim); margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .unread-dot {
      width: 7px; height: 7px; border-radius: 50%;
      background: var(--clr-accent); flex-shrink: 0; margin-top: 5px;
      box-shadow: 0 0 6px rgba(99,102,241,0.6);
    }

    /* ─── Empty & Loading States ─── */
    .state-center {
      display: flex; flex-direction: column; align-items: center; justify-content: center;
      text-align: center; padding: 48px 24px;
    }
    .state-icon {
      width: 64px; height: 64px; border-radius: 18px;
      display: flex; align-items: center; justify-content: center;
      margin-bottom: 16px;
    }
    .state-icon svg { width: 28px; height: 28px; }
    .si-neutral { background: rgba(255,255,255,0.05); color: var(--clr-text-dim); }
    .si-error { background: rgba(239,68,68,0.1); color: #f87171; border: 1px solid rgba(239,68,68,0.2); }
    .state-title { font-size: 0.8rem; font-weight: 600; color: var(--clr-text-muted); margin-bottom: 4px; }
    .state-desc { font-size: 0.68rem; color: var(--clr-text-dim); max-width: 220px; line-height: 1.4; }

    .spinner {
      width: 36px; height: 36px; border-radius: 50%;
      border: 3px solid rgba(99,102,241,0.15);
      border-top-color: var(--clr-accent);
      animation: spin .7s linear infinite;
      margin-bottom: 12px;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    /* ─── Preview Panel ─── */
    .preview-scroll { overflow-y: auto; max-height: 420px; }
    @media (min-width: 720px) { .preview-scroll { max-height: 520px; } }
    .preview-scroll::-webkit-scrollbar { width: 5px; }
    .preview-scroll::-webkit-scrollbar-track { background: transparent; }
    .preview-scroll::-webkit-scrollbar-thumb { background: rgba(168,85,247,0.25); border-radius: 3px; }

    .preview-body { padding: 20px; }
    .preview-subject { font-family: 'Syne', sans-serif; font-size: 1.05rem; font-weight: 700; color: #fff; margin-bottom: 16px; line-height: 1.3; }
    .preview-sender {
      display: flex; align-items: center; gap: 12px;
      background: rgba(255,255,255,0.03); border: 1px solid var(--clr-border);
      border-radius: 12px; padding: 12px 14px; margin-bottom: 18px;
    }
    .preview-avatar {
      width: 38px; height: 38px; border-radius: 10px;
      background: linear-gradient(135deg, var(--clr-accent), #a78bfa);
      display: flex; align-items: center; justify-content: center;
      font-weight: 700; font-size: 0.85rem; color: #fff; flex-shrink: 0;
    }
    .preview-sender-info { flex: 1; min-width: 0; }
    .preview-from { font-size: 0.75rem; font-weight: 600; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .preview-to { font-size: 0.64rem; color: var(--clr-text-dim); margin-top: 1px; }
    .preview-date { font-size: 0.62rem; color: var(--clr-text-dim); white-space: nowrap; flex-shrink: 0; text-align: right; line-height: 1.4; }
    .preview-content {
      background: rgba(255,255,255,0.025); border: 1px solid var(--clr-border);
      border-radius: 12px; padding: 18px;
      font-size: 0.78rem; color: var(--clr-text-muted); line-height: 1.7;
    }
    .preview-content img { max-width: 100%; border-radius: 8px; }
    .preview-content a { color: var(--clr-accent2); }
    .preview-content h1, .preview-content h2, .preview-content h3 { color: #fff; margin: 12px 0 6px; }
    .preview-content p { margin-bottom: 8px; }
    .preview-content table { width: 100%; border-collapse: collapse; margin: 10px 0; }
    .preview-content td, .preview-content th { padding: 6px 8px; border-bottom: 1px solid var(--clr-border); font-size: 0.72rem; }

    /* ─── Footer ─── */
    .footer {
      max-width: 680px; margin: 32px auto 0; padding: 20px 16px 28px;
      display: flex; flex-direction: column; align-items: center; gap: 6px;
    }
    .footer-lock { display: flex; align-items: center; gap: 6px; font-size: 0.64rem; color: var(--clr-text-dim); }
    .footer-lock svg { width: 13px; height: 13px; color: #facc15; }
    .footer-credit { font-size: 0.6rem; color: var(--clr-text-dim); }
    .footer-credit span { color: var(--clr-accent2); font-weight: 600; }

    /* ─── Toast ─── */
    .toast-wrap { position: fixed; top: 18px; right: 18px; z-index: 999; display: flex; flex-direction: column; gap: 8px; pointer-events: none; }
    .toast {
      display: flex; align-items: center; gap: 10px;
      background: rgba(20,26,50,0.92); border: 1px solid rgba(255,255,255,0.1);
      backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
      border-radius: 12px; padding: 12px 18px;
      font-size: 0.75rem; color: #fff; font-weight: 500;
      pointer-events: auto;
      animation: toastIn .3s cubic-bezier(.22,1,.36,1);
      box-shadow: 0 8px 32px rgba(0,0,0,0.35);
    }
    .toast.out { animation: toastOut .25s ease forwards; }
    .toast-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
    .toast-dot.success { background: #4ade80; box-shadow: 0 0 8px rgba(74,222,128,0.5); }
    .toast-dot.info { background: #818cf8; box-shadow: 0 0 8px rgba(129,140,248,0.5); }
    .toast-dot.error { background: #f87171; box-shadow: 0 0 8px rgba(248,113,113,0.5); }
    @keyframes toastIn { from { opacity:0; transform: translateX(40px) scale(.95); } to { opacity:1; transform: translateX(0) scale(1); } }
    @keyframes toastOut { to { opacity:0; transform: translateX(40px) scale(.95); } }

    /* ─── Page Entrance ─── */
    @keyframes fadeSlideUp { from { opacity:0; transform: translateY(16px); } to { opacity:1; transform: translateY(0); } }
    .anim-in { animation: fadeSlideUp .45s cubic-bezier(.22,1,.36,1) both; }
    .anim-delay-1 { animation-delay: .08s; }
    .anim-delay-2 { animation-delay: .16s; }
    .anim-delay-3 { animation-delay: .24s; }

    /* ─── Avatar gradient palette ─── */
    .av-0 { background: linear-gradient(135deg,#6366f1,#818cf8); }
    .av-1 { background: linear-gradient(135deg,#a855f7,#ec4899); }
    .av-2 { background: linear-gradient(135deg,#06b6d4,#3b82f6); }
    .av-3 { background: linear-gradient(135deg,#f59e0b,#ef4444); }
    .av-4 { background: linear-gradient(135deg,#10b981,#06b6d4); }
    .av-5 { background: linear-gradient(135deg,#ec4899,#f97316); }