:root {
    --header-background: #202c33; /* header, container backgrounds */
    --header-item-active: #374248;
    --header-item: #aebac1;
    --header-hover: #fef9ee;
    --background-color: #111b21;
    --border-color: #374045;
    --chat-background: #222e35;
    --input-background: #2a3942;
    --input-placeholder: #8696a0;
    --input-color: #bac1c6;
    --danger-color: #da423c;
    --danger-color-hover: #c12924;
    --content-color: #d1d7db;
    --content-secondary: #aebac1;
    --button-main: #128c7e;
    --button-main-hover: #075e54;
    --button-secondary: #4a90e2;
    --button-secondary-hover: #357ab7;
    --accent-color: #21C063;
    --item-unseen: #00a884;
    --message-right: #09876c;
    --message-left: #1c262d;
    --font-family: 'Inter';
    --transition-duration: 0.3s;
}

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

html, body {
    margin: 0;
    width: 100%;
    overflow-x: hidden;
}

html {
    font-size: 1rem;
    -webkit-text-size-adjust: 100%;
}

input[type=text],
input[type=password],
textarea {
    font-size: 1rem;
    width: 100%;
    box-sizing: border-box;
}

button,
.btn {
    border: none;
    outline: none;
}

main {
    a,
    a:link {
        color: var(--accent-color);
    }

    a:visited {
        color: var(--accent-color);
    }

    a:hover,
    a:focus {
        color: var(--item-unseen);
    }
}


/* Базовые стили для body */
body {
    font-family: var(--font-family), sans-serif;
    background-color: var(--background-color);
    color: var(--content-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    min-width: 25rem;
}

/* Стили для header */
header {
    background-color: var(--header-background);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
}

header h1 {
    font-size: 1.5rem;
    color: var(--header-item);
}

/* Стили для навигации */
nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

nav a {
    text-decoration: none;
    color: var(--header-item);
    transition: color var(--transition-duration);
    background: transparent;
    padding: 0.5rem 1rem;
    border-radius: 0.2rem;
}

nav a:hover {
    color: var(--header-hover);
}

nav a.active {
    background: var(--header-item-active);

    &:hover {
        color: var(--header-item);
    }
}

/* Основное содержимое */
main {
    flex: 1;
    padding: 2rem 0;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Стили для footer */
footer {
    background-color: var(#202c33);
    border-top: 1px solid #e2e8f0;
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    color: #718096;
}

/* Стили для форм */
.auth-form {
    background: #fff;
    padding: 2rem;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    max-width: 400px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.auth-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.auth-form input {
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #cbd5e0;
    border-radius: 4px;
}

.auth-form button {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 4px;
    background-color: #4a90e2;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-duration);
}

.auth-form button:hover {
    background-color: #357ab7;
}

/* Стили для кнопки "Выйти" */
.btn-danger {
    background-color: var(--danger-color);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color var(--transition-duration);
}

.btn-danger:hover {
    color: #fff;
    background-color: #c53030;
}

/* Адаптивность: изменение расположения навигации на мобильных устройствах */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .emoji-btn {
        height: 0;
        display: none;
    }
}


/* ---------- карточки инстансов ---------- */
.card {
    background: var(--chat-background);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.card-head {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.75rem;
    border-radius: 4px;
    background-color: var(--header-background);
}

.card-head__left {
    display: flex;
    flex-direction: column;
}

.card-head__name {
    font-weight: 600;
}

.state-dot {
    width: 0.7rem;
    height: 0.7rem;
    border-radius: 50%;
    display: inline-block;
}

.state-dot.success {
    background: #21c063;
}

.state-dot.danger {
    background: var(--danger-color);
}

.state-dot.warning {
    background: #f5c542;
}

.card-head .api-id {
    margin-left: auto;
    font-weight: 600;
    color: var(--content-secondary);
}

.card-head .help {
    font-weight: 700;
    text-decoration: none;
    color: var(--content-secondary);
}

.card-body p {
    margin-bottom: 0.4rem;
}

.card-body.secret {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border-color);
    font-size: 0.95rem;
}

.card-body.secret .sub {
    font-size: 0.8rem;
    color: var(--content-secondary);
}

.card-foot {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
    gap: 0.5rem;
}

.btn-row {
    margin-left: auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* ---------- кнопки ---------- */
.btn {
    background: var(--button-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    text-decoration: none;
    cursor: pointer;
    color: var(--content-color) !important;
    transition: background var(--transition-duration);
    font-size: 0.9rem;
}

.btn:hover {
    color: var(--content-secondary) !important;
    background: var(--button-secondary-hover);
}

.btn.main {
    background: var(--button-main);
}

.btn.main:hover {
    background: var(--button-main-hover);
}

.btn.danger {
    background: var(--danger-color);
}

.btn.danger:hover {
    background: var(--danger-color-hover);
}

a.disabled {
    pointer-events: none;
    opacity: .8;
    cursor: default;
}

/* ---------- форма добавления ---------- */
details.instance-form {
    margin-right: 1rem;
    margin-left: 1rem;
    margin-bottom: 1.5rem;
    background: var(--chat-background);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem 1.25rem;
}

details.instance-form summary {
    cursor: pointer;
    font-weight: 600;
    outline: none;
    user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-user-select: none;
}

details[open] summary {
    margin-bottom: 1rem;
}

.form-grid {
    display: grid;
    gap: 1rem 2rem;
}

@media (min-width: 760px) {
    .form-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.form-grid label {
    font-size: 0.9rem;
}

.form-grid input,
.form-grid textarea {
    width: 100%;
    margin: 0.25rem 0 0.75rem;
    padding: 0.4rem;
    font-family: var(--font-family), sans-serif;
    background: var(--input-background);
    color: var(--input-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.hint {
    display: block;
    margin-top: -0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    color: var(--content-secondary);
}

/* опасный текст */
.danger {
    color: var(--danger-color);
}

.form-row {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-bottom: .75rem;
}

.switch {
    height: 0;
    width: 0;
    visibility: hidden;
}

.form-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

/* hide the real checkbox */
.switch {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

/* style the label into a toggle */
.form-row label {
    position: relative;
    padding-left: 46px; /* space for the switch */
    cursor: pointer;
    user-select: none;
    line-height: 20px;
    color: var(--content-color);
}

/* the track */
.form-row label::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 36px;
    height: 20px;
    background: var(--border-color);
    border-radius: 10px;
    transition: background var(--transition-duration);
}

/* the knob */
.form-row label::after {
    content: "";
    position: absolute;
    left: 2px;
    top: 2px;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    transition: transform var(--transition-duration);
}

/* checked state */
.switch:checked + label::before {
    background: var(--accent-color);
}

.switch:checked + label::after {
    transform: translateX(16px);
}

textarea {
    resize: vertical;
}

.textarea-wrap {
    position: relative;
}

.emoji-btn {
    position: absolute;
    right: 0.75rem;
    top: 1rem;
    background: transparent;
    border: none;
    padding: 0;
    width: 20px;
    height: 20px;
    color: var(--input-placeholder);
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    transition: color var(--transition-duration);
}

.emoji-btn:hover,
.emoji-btn:focus {
    color: var(--input-color);
}

emoji-picker {
    bottom: 10px;
    right: 10px;
    z-index: 9999;
}

emoji-picker[hidden] {
    display: none;
}

.form-error {
    color: var(--danger-color);
    margin-top: 0.5rem;
    font-size: 0.85rem;
}

.text-muted {
    color: var(--content-secondary);
}

/* QR */

#qr-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

/* show when not hidden */
#qr-backdrop:not([hidden]) {
    display: flex;
}

#qr-box {
    background: #202c33;
    max-width: 400px;
    width: 90%;
    padding: 1.5rem;
    border-radius: .5rem;
    position: relative;
    text-align: center;
    animation: pop .25s ease-out;
}

@keyframes pop {
    from {
        transform: scale(.9);
        opacity: 0
    }
    to {
        transform: scale(1);
        opacity: 1
    }
}

#qr-close {
    position: absolute;
    top: .5rem;
    right: .5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #ddd;
    cursor: pointer;
}

#qr-content {
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* multi select */
/* from codepen: https://codepen.io/akshaykumar/pen/PXyEXO OG author: Akshay Kumar */
select.multiselect {
    width: 100%;
    min-width: 280px;
    background: var(--chat-background);
    border: 1px solid var(--input-color);
    border-radius: 4px;
    overflow-y: auto;
}

/* ─────────── базовый <option> ─────────── */
select.multiselect option {
    position: relative; /* опорный контекст */
    padding: 8px 8px 8px 28px;
    font-size: 14px;
    line-height: 18px;
    color: var(--input-color);
    background: var(--chat-background);
    cursor: pointer;
}

/* чекбокс слева */
select.multiselect option::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 0;
    bottom: 0;
    margin: auto;
    width: 18px;
    height: 18px;
    border: 1px solid var(--input-color);
    border-radius: 2px;
    background: var(--chat-background);
    z-index: 1; /* поверх фона ::after */
}

/* активная галочка */
select.multiselect option:checked::before {
    border-color: var(--accent-color);
    background: var(--accent-color) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='8' viewBox='0 0 10 8'%3E%3Cpath fill='white' d='M3.8 6.4 0 2.6 1.4 1.2l2.4 2.4L8.6 0 10 1.4z'/%3E%3C/svg%3E") no-repeat center/10px;
}

/* ────────── перекрытие системного Highlight ────────── */
select.multiselect option:checked {
    /* color: transparent !important; */
}

select.multiselect option:checked::after {
    content: attr(title);
    position: absolute;
    inset: 0;
    padding: 8px 8px 8px 28px;
    background: var(--input-background);
    color: var(--input-color);
    pointer-events: none;
    z-index: 0;
}

/* ────────── служебные мелочи ────────── */
select.multiselect option:focus {
    background: var(--chat-background) !important;
    outline: none;
}

select.multiselect:focus {
    outline: none;
}

/* запасные случаи (фокус, Firefox и пр.) */
select.multiselect:focus option:checked,
select.multiselect:-moz-focusring option:checked,
select.multiselect option[selected] {
    background: var(--input-background) !important;
}

/* CHAT */
.chat-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh; /* во всю высоту вкладки */
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid var(--border-color);
    background: var(--chat-background);
}

/* список сообщений */
.chat-feed {
    display: flex;
    flex-direction: column-reverse;
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    position: relative;
}

.chat-feed.loading {
    overflow: hidden;
}

/* оверлей-индикатор */
.chat-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, .55);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
    z-index: 2; /* поверх пузырей */
}

.chat-overlay.hidden {
    display: none
}

/* пузырьки */
.msg {
    max-width: 66%;
    margin: .25rem 0;
    padding: .75rem 1rem;
    border-radius: 1rem;
    font-size: .95rem;
    line-height: 1.4;
    word-break: break-word;
}

.msg-left {
    background: var(--message-left);
    color: var(--content-color);
    border-bottom-left-radius: 0
}

.msg-right {
    background: var(--message-right);
    color: var(--content-color);
    margin-left: auto;
    border-bottom-right-radius: 0
}


.chat-inputarea {
    display: flex;
    gap: .5rem;
    padding: .75rem;
    background: var(--input-background);
    border-top: 1px solid var(--border-color);
    align-items: center;
}

.textarea-wrap textarea::placeholder {
    color: var(--input-placeholder)
}

.textarea-wrap {
    position: relative;
    flex: 1
}

.textarea-wrap textarea {
    width: 100%;
    min-height: 3rem;
    max-height: 8rem;
    resize: none;
    overflow-y: hidden;
    padding: .6rem .9rem;
    padding-right: 2.4rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: .5rem;
    color: var(--input-color);
    line-height: 1.3;
    font-family: inherit;
    font-size: 1rem;
}

.emoji-btn {
    position: absolute;
    top: .55rem;
    right: .95rem;
    width: 1.1rem;
    height: 1.1rem;
    border: none;
    background: none;
    cursor: pointer;
    opacity: .6;
    transition: opacity .15s
}

.emoji-btn svg {
    width: 100%;
    height: 100%;
    fill: var(--input-color)
}

.emoji-btn:hover {
    opacity: 1
}

.icon-btn {
    display: grid;
    place-items: center;
    width: 2.4rem;
    height: 2.4rem;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: .4rem;
    transition: all .3s ease;
}

.icon-btn svg {
    width: 1.6rem;
    height: 1.6rem;
    fill: var(--button-main)
}

.icon-btn:hover {
    fill: var(--button-main-hover)
}

.send-btn {
    background: none
}

.chat-inputarea {
    display: flex;
    gap: .5rem;
    padding: .75rem;
    background: var(--input-background);
    border-top: 1px solid var(--border-color)
}

.file-list {
    list-style: none;
    padding: 0;
    margin: .5rem 0 0 0;
    font-size: .85rem
}

.file-list li {
    display: flex;
    align-items: center;
    gap: .25rem;
    margin: .15rem 0
}

.file-list li button {
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer
}

#uploader {
    transition: opacity .3s ease;
}

#uploader[hidden] {
    display: block;
    opacity: 0;
    height: 0;
    overflow: hidden;
}

.card {
    margin-left: 1rem;
    margin-right: 1rem;
}

@media (max-width: 480px) {
    .chat-wrapper {
        border: none;
        margin: 0;
    }

    .msg {
        max-width: 85%;
    }

    nav ul {
        gap: .75rem;
    }
}

/* dates */

.chat-date-sep{
        background: var(--message-left);
    text-align: center;
    margin: .5rem auto .25rem;
    padding: 0.25rem 0.5rem;
    font-size: .75rem;
    border-radius: 8px;
    font-weight: 600;
    color: #888;
    position: relative;
}