body{
    margin: 0;
    min-height: 100vh;
    font-family: Arial;
    color: #f5f5f7;
    background-color: black;
    background-image: url("../images/background.png");
    background-size: cover;
    background-attachment: fixed;
}
.header {
    width: 100%;
    height: 100px;
    background-color: rgb(31, 31, 255);
    display: flex;
}

.left_part {
    display: flex;
    flex: 1;
    height: 100%;
    background-color: black;
    flex-direction: row;
}

.middle_part {
    display: flex;
    flex: 2;
    height: 100%;
    background-color: rgb(0, 0, 0);
    align-items: center;
    justify-content: center;
    gap: 4%;
    box-sizing: border-box;
}

.right_part {
    display: flex;
    flex: 1;
    height: 100%;
    background-color: rgb(0, 0, 0);
    align-items: center;
    gap: 10%;
}

.logo_img {
    height: 50px;
    width: auto;
}

.logo_div {
    display: flex;
    align-items: center;
    padding-left: 1.1%;
    box-sizing: border-box;
}

.logo_div a {
    display: flex;
    align-items: center;
}

/* Лінки в хедері: без підкреслення, з плавною лінією при наведенні */
.header_link {
    position: relative;
    display: inline-block;
    font-size: 30px;
    color: rgb(42, 143, 255);
    text-decoration: none;
    padding-bottom: 4px;
    transition: color 0.3s;
}

.header_link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background-color: rgb(42, 143, 255);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.header_link:hover {
    color: rgb(110, 180, 255);
}

.header_link:hover::after {
    transform: scaleX(1);
}

.search_input {
    height: 45%;
    width: 70%;
}

.theme_switch {
    width: 40px;
    height: 40px;
    margin-left: -10px;
    background-color: rgb(42, 143, 255);
    border-radius: 10px;
    border: none;
    cursor: pointer;
}

/* ---------- Чат ---------- */

main {
    display: flex;
    justify-content: center;
    padding: 32px 24px 40px;
}

.main_chat {
    display: flex;
    width: 100%;
    max-width: 1200px;
    height: calc(100vh - 76px - 80px);
    min-height: 520px;
    overflow: hidden;
    background: rgba(20, 24, 36, 0.62);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    backdrop-filter: blur(24px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 28px;
    box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.8);
}

/* Бокова панель із чатами */
.rooms {
    flex: none;
    width: 300px;
    display: flex;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.25);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.rooms_title {
    margin: 0;
    padding: 22px 22px 14px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.rooms_list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 0 10px 12px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.room {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 10px 12px;
    font: inherit;
    color: inherit;
    text-align: left;
    background: transparent;
    border: 0;
    border-radius: 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.room:hover { background: rgba(255, 255, 255, 0.07); }
.room.active { background: rgb(42, 143, 255); }

.room_icon {
    flex: none;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(145deg, #4aa3ff, #0057ff);
    border-radius: 50%;
}

.room.active .room_icon { background: rgba(255, 255, 255, 0.22); }

.room_text {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.room_name {
    font-size: 16px;
    font-weight: 600;
}

.room_last {
    overflow: hidden;
    font-size: 13px;
    color: #a1a1a6;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.room.active .room_last { color: rgba(255, 255, 255, 0.8); }

.room_badge {
    flex: none;
    min-width: 20px;
    padding: 1px 6px;
    font-size: 12px;
    font-weight: 700;
    line-height: 18px;
    text-align: center;
    color: #fff;
    background: rgb(42, 143, 255);
    border-radius: 10px;
}

.room.active .room_badge { display: none; }

/* Права частина — вікно чату */
.chat_view {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.chat_head {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chat_head .room_icon { width: 40px; height: 40px; font-size: 18px; }

.chat_title { font-size: 17px; font-weight: 600; line-height: 1.2; }

.chat_status { font-size: 13px; color: #a1a1a6; }

.chat_status::before {
    content: "";
    display: inline-block;
    width: 7px;
    height: 7px;
    margin-right: 6px;
    border-radius: 50%;
    background: #30d158;
}

.chat_massages {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 24px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.chat_day {
    align-self: center;
    margin: 4px 0 12px;
    font-size: 12px;
    color: #6e6e73;
}

.bubble {
    max-width: min(72%, 520px);
    padding: 9px 16px;
    font-size: 16px;
    line-height: 1.35;
    border-radius: 20px;
    overflow-wrap: anywhere;
    animation: pop 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.bubble_in {
    align-self: flex-start;
    background: #2c2c2e;
    border-bottom-left-radius: 6px;
}

.bubble_out {
    align-self: flex-end;
    color: #fff;
    background: rgb(42, 143, 255);
    border-bottom-right-radius: 6px;
}

@keyframes pop {
    from { opacity: 0; transform: translateY(10px) scale(0.96); }
    to   { opacity: 1; transform: none; }
}

.composer {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.massage_input {
    flex: 1;
    height: 44px;
    padding: 0 20px;
    font: inherit;
    color: #f5f5f7;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid transparent;
    border-radius: 22px;
    outline: none;
    transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.massage_input::placeholder { color: #6e6e73; }

.massage_input:focus {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgb(42, 143, 255);
    box-shadow: 0 0 0 4px rgba(42, 143, 255, 0.2);
}

.send {
    flex: none;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    color: #fff;
    background: rgb(42, 143, 255);
    border: 0;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.send:hover { background: rgb(74, 163, 255); }
.send:active { transform: scale(0.92); }
.send svg { width: 20px; height: 20px; }

@media (max-width: 800px) {
    main { padding: 12px; }
    .main_chat { flex-direction: column; height: calc(100vh - 64px - 24px); }
    .rooms { width: 100%; flex-direction: row; border-right: 0; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
    .rooms_title { display: none; }
    .rooms_list { flex-direction: row; padding: 10px; overflow-x: auto; overflow-y: hidden; }
    .room { width: auto; flex: none; padding: 8px 14px 8px 8px; }
    .room_last, .room_badge { display: none; }
    .bubble { max-width: 85%; }
}

.b_author { display: block; margin-bottom: 2px; font-size: 12px; opacity: 0.7; }

/* ---------- Як у Telegram: меню повідомлення, відповіді, редагування ---------- */
.chat_massages { position: relative; }
.bubble { position: relative; }
.b_text { white-space: pre-wrap; }
.b_meta { float: right; margin: 6px -4px -3px 12px; font-size: 11px; line-height: 1.6; opacity: 0.6; white-space: nowrap; }

/* Цитата повідомлення, на яке відповіли */
.b_reply {
    display: block; margin: 2px 0 6px; padding: 4px 10px; max-width: 100%; box-sizing: border-box;
    font-size: 13px; line-height: 1.35; background: var(--accent-soft, rgba(42, 143, 255, 0.15));
    border-left: 3px solid var(--accent, rgb(42, 143, 255)); border-radius: 8px; cursor: pointer;
}
.b_reply b { display: block; font-size: 12px; color: var(--accent, rgb(42, 143, 255)); }
.b_reply span { display: block; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; opacity: 0.85; }
.b_reply.gone { font-style: italic; opacity: 0.7; cursor: default; }
.bubble_out .b_reply { background: rgba(255, 255, 255, 0.18); border-left-color: #fff; }
.bubble_out .b_reply b { color: #fff; }

.bubble.picked { box-shadow: 0 0 0 2px var(--warm, #ffb454); }
.bubble.flash { animation: b_flash 1.4s ease-out; }
@keyframes b_flash { 0%, 100% { box-shadow: none; } 25% { box-shadow: 0 0 0 4px var(--warm, #ffb454); } }

/* Контекстне меню */
.ctx_menu {
    position: absolute; z-index: 20; min-width: 200px; padding: 6px;
    background: var(--panel, #1c1c1e); border: 1px solid var(--line, rgba(255, 255, 255, 0.12)); border-radius: 14px;
    box-shadow: 0 18px 40px -12px rgba(0, 0, 0, 0.6); animation: ctx_in 0.14s ease-out;
}
.ctx_menu button {
    display: flex; align-items: center; gap: 12px; width: 100%; padding: 10px 12px;
    font: inherit; font-size: 15px; text-align: left; color: var(--ink, #f5f5f7);
    background: none; border: none; border-radius: 10px; cursor: pointer;
}
.ctx_menu button:hover, .ctx_menu button:focus-visible { background: var(--accent-soft, rgba(42, 143, 255, 0.15)); outline: none; }
.ctx_menu .ctx_ic { width: 20px; text-align: center; }
.ctx_menu .danger { color: #ff6b61; }
@keyframes ctx_in { from { opacity: 0; transform: scale(0.96); } to { opacity: 1; transform: none; } }

/* Панель «Відповідь для…» / «Редагування» над полем вводу */
.compose_bar { display: flex; align-items: center; gap: 12px; padding: 10px 18px 0; }
.compose_bar[hidden] { display: none; }
.compose_bar .cb_ic { flex: none; font-size: 20px; color: var(--accent, rgb(42, 143, 255)); }
.compose_bar .cb_body { flex: 1; min-width: 0; padding-left: 10px; border-left: 3px solid var(--accent, rgb(42, 143, 255)); }
.compose_bar b { display: block; font-size: 13px; color: var(--accent, rgb(42, 143, 255)); }
.compose_bar .cb_body span { display: block; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; font-size: 14px; color: var(--muted, #a1a1a6); }
.compose_bar button {
    flex: none; width: 34px; height: 34px; font-size: 16px; color: var(--muted, #a1a1a6);
    background: none; border: none; border-radius: 50%; cursor: pointer;
}
.compose_bar button:hover { color: var(--ink, #f5f5f7); background: var(--accent-soft, rgba(42, 143, 255, 0.15)); }
.compose_bar:not([hidden]) + .composer { border-top: none; }
.compose_bar { border-top: 1px solid var(--line, rgba(255, 255, 255, 0.1)); }

/* Телефон: довге натискання не виділяє текст і не відкриває системне меню */
@media (hover: none) {
    .bubble { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
}