:root {
    --red: #D52B1E;
    --red-dark: #B81F13;
    --ink: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --bg: #f4f5f7;
    --card: #ffffff;
    --ok: #059669;
    --sms: #0284c7;
    --agents: #7c3aed;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: 'DM Sans', system-ui, sans-serif;
    color: var(--ink);
    background:
        radial-gradient(1200px 500px at 10% -10%, rgba(213, 43, 30, 0.12), transparent 55%),
        radial-gradient(900px 400px at 100% 0%, rgba(2, 132, 199, 0.10), transparent 50%),
        var(--bg);
}
.boot {
    min-height: 100vh;
    display: grid;
    place-content: center;
    gap: 12px;
    text-align: center;
    color: var(--muted);
}
.spinner {
    width: 36px; height: 36px; margin: 0 auto;
    border: 3px solid #fecaca; border-top-color: var(--red);
    border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.shell { max-width: 720px; margin: 0 auto; padding: 28px 16px 48px; }
.top {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 28px; gap: 12px;
}
.logo { height: 28px; }
.user-chip {
    font-size: 13px; color: var(--muted);
    background: var(--card); border: 1px solid var(--line);
    border-radius: 999px; padding: 6px 12px;
}

.tabs {
    display: flex; gap: 8px; margin-bottom: 20px;
}
.tab {
    border: 1px solid var(--line); background: var(--card);
    border-radius: 999px; padding: 8px 14px; font-weight: 600;
    font-size: 13px; cursor: pointer; color: var(--muted);
}
.tab.active { color: #fff; border-color: transparent; }
.tab.active.sms { background: var(--sms); }
.tab.active.agents { background: var(--agents); }

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 22px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}
.balance-label {
    font-size: 12px; text-transform: uppercase; letter-spacing: .06em;
    color: var(--muted); margin-bottom: 6px;
}
.balance-value {
    font-size: 48px; font-weight: 800; letter-spacing: -0.03em;
    font-variant-numeric: tabular-nums; line-height: 1.05;
}
.balance-unit { font-size: 14px; color: var(--muted); margin-top: 4px; }

.packs { display: grid; gap: 10px; margin-top: 22px; }
.pack {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px;
    cursor: pointer; background: #fff; transition: .15s;
}
.pack:hover { border-color: #cbd5e1; transform: translateY(-1px); }
.pack.selected { border-color: var(--red); box-shadow: 0 0 0 3px rgba(213,43,30,.12); }
.pack-name { font-weight: 700; }
.pack-meta { font-size: 13px; color: var(--muted); margin-top: 2px; }
.pack-price { font-weight: 800; font-size: 18px; white-space: nowrap; }

.actions { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
    border: none; border-radius: 10px; padding: 12px 18px;
    font-weight: 700; font-size: 14px; cursor: pointer;
    display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary { background: linear-gradient(135deg, var(--red), #f96256); color: #fff; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-secondary { background: #fff; border: 1px solid var(--line); color: var(--ink); }

.login {
    max-width: 420px; margin: 10vh auto; padding: 0 16px;
}
.login .card { text-align: center; }
.login h1 { margin: 12px 0 6px; font-size: 24px; }
.login p { color: var(--muted); margin: 0 0 18px; }
.login input {
    width: 100%; border: 1px solid var(--line); border-radius: 10px;
    padding: 12px 14px; font-size: 15px; margin-bottom: 10px;
}
.err { color: #b91c1c; font-size: 13px; margin-top: 8px; }

.recharge-overlay {
    position: fixed; inset: 0; z-index: 1000;
    background: rgba(15,23,42,.55);
    display: flex; align-items: center; justify-content: center;
    padding: 16px; animation: fadeIn .25s ease-out;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop {
    from { opacity: 0; transform: scale(.85) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes bounce {
    0% { transform: scale(.3); opacity: 0; }
    60% { transform: scale(1.15); opacity: 1; }
    100% { transform: scale(1); }
}