:root {
    --ink: #17213d;
    --muted: #77809a;
    --line: #e8eaf3;
    --brand: #6958e8;
    --brand-dark: #5140ce;
    --soft: #f4f2ff;
    --success: #1d9b67;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

body {
    direction: rtl;
    font-family: Arial, Tahoma, sans-serif;
    color: var(--ink);
    background: linear-gradient(160deg, #f6f4ff 0%, #f7f9fd 45%, #edf7ff 100%);
}

button, input, textarea { font: inherit; }
button { cursor: pointer; }

.app {
    width: min(1120px, 100%);
    min-height: 100vh;
    margin: auto;
    padding: 22px;
}

.topbar, .panel, .group-card, .modal-card {
    background: rgba(255, 255, 255, .94);
    border: 1px solid rgba(232, 234, 243, .9);
    box-shadow: 0 18px 45px rgba(64, 54, 145, .08);
}

.topbar {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    border-radius: 24px;
    margin-bottom: 18px;
}

.topbar h1 { margin: 0; font-size: clamp(22px, 4vw, 30px); }
.topbar p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.topbar-copy { flex: 1; }

.icon-btn, .ghost-btn, .primary-btn, .danger-btn {
    border: 0;
    border-radius: 14px;
    min-height: 44px;
    padding: 0 17px;
    font-weight: 700;
}

.icon-btn, .ghost-btn { background: #f0f2f8; color: var(--ink); }
.primary-btn { color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-dark)); }
.danger-btn { color: #b52d43; background: #fff0f3; }
.small-btn { min-height: 36px; padding: 0 13px; border-radius: 11px; }
.call-start-btn { border: 0; color: #fff; background: linear-gradient(135deg, #18a873, #12845c); font-weight: 800; }

.layout { display: grid; grid-template-columns: 350px 1fr; gap: 18px; min-height: calc(100vh - 132px); }
.panel { border-radius: 24px; overflow: hidden; }
.sidebar { display: flex; flex-direction: column; }

.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px; border-bottom: 1px solid var(--line); }
.section-head h2 { margin: 0; font-size: 18px; }
.count { color: var(--brand); background: var(--soft); border-radius: 20px; padding: 4px 9px; font-size: 12px; font-weight: 800; }

.invites { padding: 12px; border-bottom: 1px solid var(--line); }
.invite-card { background: #fff8e8; border: 1px solid #f6e2ae; border-radius: 16px; padding: 12px; margin-bottom: 9px; }
.invite-card:last-child { margin-bottom: 0; }
.invite-card strong, .invite-card span { display: block; }
.invite-card span { margin-top: 4px; color: #7b6d48; font-size: 12px; }
.invite-actions { display: flex; gap: 7px; margin-top: 10px; }

.groups-list { padding: 10px; overflow: auto; flex: 1; }
.group-card { width: 100%; text-align: right; border-radius: 17px; padding: 14px; margin-bottom: 9px; cursor: pointer; transition: .18s ease; }
.group-card:hover, .group-card.active { border-color: #cfc8ff; transform: translateY(-1px); }
.group-card.active { background: var(--soft); }
.group-card h3 { margin: 0 0 6px; font-size: 16px; }
.group-card p { margin: 0; color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.chat-panel { display: flex; flex-direction: column; min-width: 0; }
.empty-state { margin: auto; padding: 40px 25px; text-align: center; color: var(--muted); }
.empty-state .emoji { display: block; font-size: 58px; margin-bottom: 12px; }

.chat-view { display: none; min-height: 0; height: 100%; flex-direction: column; }
.chat-view.show { display: flex; }
.chat-head { display: flex; align-items: center; gap: 12px; padding: 15px 18px; border-bottom: 1px solid var(--line); }
.chat-avatar { display: grid; place-items: center; width: 46px; height: 46px; flex: 0 0 46px; border-radius: 15px; color: #fff; font-size: 20px; font-weight: 900; background: linear-gradient(145deg, #8b7bf3, #5848d4); }
.chat-title { flex: 1; min-width: 0; }
.chat-title h2 { margin: 0; font-size: 18px; }
.chat-title p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }

.messages { flex: 1; min-height: 260px; overflow: auto; padding: 20px; background: linear-gradient(rgba(248,249,253,.92), rgba(248,249,253,.92)), radial-gradient(circle at 10% 20%, #ded8ff 0 2px, transparent 3px); background-size: auto, 28px 28px; }
.message { width: fit-content; max-width: min(78%, 520px); background: #fff; border: 1px solid var(--line); border-radius: 18px 18px 18px 5px; padding: 10px 13px 7px; margin: 0 0 11px auto; box-shadow: 0 5px 18px rgba(35,40,70,.05); }
.message.mine { margin-right: auto; margin-left: 0; color: #fff; background: linear-gradient(145deg, #7868ed, #5c4bd7); border-color: transparent; border-radius: 18px 18px 5px 18px; }
.message-name { display: block; font-size: 11px; font-weight: 800; color: var(--brand); margin-bottom: 4px; }
.message.mine .message-name { color: #e6e2ff; }
.message-text { white-space: pre-wrap; overflow-wrap: anywhere; }
.message-time { display: block; margin-top: 5px; font-size: 10px; opacity: .68; text-align: left; }

.composer { display: flex; gap: 10px; padding: 14px; border-top: 1px solid var(--line); }
.composer input { flex: 1; min-width: 0; border: 1px solid var(--line); background: #f8f9fc; border-radius: 15px; padding: 0 15px; outline: none; }
.composer input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(105,88,232,.12); }

.modal { position: fixed; inset: 0; z-index: 50; display: none; align-items: center; justify-content: center; padding: 20px; background: rgba(18, 22, 42, .52); backdrop-filter: blur(5px); }
.modal.show { display: flex; }
.modal-card { width: min(480px, 100%); max-height: 86vh; overflow: auto; border-radius: 24px; padding: 20px; }
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.modal-head h2 { margin: 0; font-size: 20px; }
.field { display: block; margin-bottom: 14px; }
.field span { display: block; margin-bottom: 7px; font-size: 13px; font-weight: 800; }
.field input, .field textarea { width: 100%; border: 1px solid var(--line); border-radius: 13px; padding: 12px; outline: none; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--brand); }
.modal-actions { display: flex; gap: 9px; justify-content: flex-end; }
.people-list { display: grid; gap: 8px; max-height: 360px; overflow: auto; }
.person { display: flex; align-items: center; gap: 10px; padding: 10px; border: 1px solid var(--line); border-radius: 14px; }
.person-avatar { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: var(--brand); background: var(--soft); font-weight: 900; }
.person-name { flex: 1; }
.notice { padding: 11px 13px; border-radius: 13px; margin-bottom: 12px; background: #effaf5; color: #177752; font-size: 13px; }
.call-card { text-align: center; overflow: hidden; background: linear-gradient(165deg, #211d3f, #12172b); color: #fff; border-color: rgba(255,255,255,.1); }
.call-card h2 { margin: 15px 0 4px; }
.call-group-name { margin: 0; color: #c7c3e8; }
.call-orb { width: 112px; height: 112px; margin: 8px auto; display: grid; place-items: center; border-radius: 50%; background: rgba(105,88,232,.25); border: 1px solid rgba(183,174,255,.4); box-shadow: 0 0 0 14px rgba(105,88,232,.08); }
.call-orb span { display: grid; place-items: center; width: 76px; height: 76px; border-radius: 50%; font-size: 32px; background: linear-gradient(145deg, #7c6aed, #5544cc); }
.call-orb.live { animation: callPulse 1.8s infinite; }
@keyframes callPulse { 50% { box-shadow: 0 0 0 22px rgba(105,88,232,.04); transform: scale(1.02); } }
.call-status { min-height: 20px; margin: 12px 0; color: #a9e7ce; font-size: 13px; }
.call-people { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; min-height: 64px; margin: 14px 0 20px; }
.call-person { display: flex; align-items: center; gap: 7px; padding: 7px 10px; border-radius: 999px; background: rgba(255,255,255,.09); font-size: 12px; }
.call-person i { display: grid; place-items: center; width: 27px; height: 27px; border-radius: 50%; background: #6958e8; font-style: normal; font-weight: 900; }
.call-controls { display: flex; justify-content: center; gap: 14px; }
.call-control { width: 88px; height: 70px; display: grid; place-items: center; align-content: center; gap: 4px; border-radius: 18px; font-size: 20px; }
.call-control span { font-size: 11px; }
.call-control.muted { color: #b52d43; background: #fff0f3; }
.hidden, [hidden] { display: none !important; }
.loading { padding: 26px; color: var(--muted); text-align: center; }

@media (max-width: 760px) {
    .app { padding: 10px; }
    .topbar { border-radius: 18px; margin-bottom: 10px; padding: 12px; }
    .topbar p { display: none; }
    .topbar .primary-btn { padding: 0 12px; }
    .chat-head { flex-wrap: wrap; }
    .chat-title { flex-basis: calc(100% - 120px); }
    .call-start-btn, .chat-head #inviteBtn { flex: 1; }
    .layout { display: block; min-height: calc(100vh - 88px); }
    .panel { border-radius: 18px; }
    .sidebar { min-height: calc(100vh - 88px); }
    .chat-panel { display: none; position: fixed; inset: 0; z-index: 20; border-radius: 0; }
    .chat-panel.mobile-open { display: flex; }
    .mobile-back { display: inline-grid !important; place-items: center; }
}

@media (min-width: 761px) { .mobile-back { display: none !important; } }

.public-groups { border-top: 1px solid var(--line); background: #fafbff; }
.public-groups-list { padding: 10px; max-height: 260px; overflow: auto; }
.public-group-card { display: grid; grid-template-columns: 1fr auto; gap: 9px; align-items: center; padding: 12px; margin-bottom: 8px; border: 1px solid #dedff0; border-radius: 15px; background: #fff; }
.public-group-card h3 { margin: 0 0 4px; font-size: 14px; }
.public-group-card p { margin: 0; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.public-group-card button { border: 0; border-radius: 10px; padding: 8px 12px; color: #fff; background: var(--success); font-weight: 800; }
.group-visibility { display: inline-flex; margin-top: 8px; padding: 3px 7px; border-radius: 99px; color: #177752; background: #e9faf3; font-size: 10px; font-weight: 800; }
.group-visibility.private { color: #6d6485; background: #f1eef8; }
.visibility-field { border: 0; padding: 0; margin: 16px 0; }
.visibility-field legend { margin-bottom: 8px; font-size: 13px; font-weight: 800; }
.visibility-option { display: grid; grid-template-columns: auto auto 1fr; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 13px; padding: 11px; margin-top: 8px; cursor: pointer; }
.visibility-option:has(input:checked) { border-color: var(--brand); background: var(--soft); }
.visibility-option input { accent-color: var(--brand); }
.visibility-option>span { font-size: 20px; }
.visibility-option div { display: grid; gap: 3px; }
.visibility-option b { font-size: 13px; }
.visibility-option small { color: var(--muted); font-size: 11px; }