:root {
    --f-text: #f5f5f7;
    --f-text-2: #a1a1a6;
    --f-text-3: #6e6e73;
    --f-panel: rgba(20, 24, 36, 0.62);
    --f-panel-2: rgba(0, 0, 0, 0.25);
    --f-card: rgba(255, 255, 255, 0.05);
    --f-card-hover: rgba(255, 255, 255, 0.09);
    --f-line: rgba(255, 255, 255, 0.1);
    --f-input: rgba(255, 255, 255, 0.08);
    --f-dialog: #12151f;
    --f-accent: rgb(42, 143, 255);
}

html[data-theme="light"] {
    --f-text: #0b1220;
    --f-text-2: #4b5563;
    --f-text-3: #8b93a1;
    --f-panel: rgba(255, 255, 255, 0.72);
    --f-panel-2: rgba(255, 255, 255, 0.55);
    --f-card: rgba(255, 255, 255, 0.7);
    --f-card-hover: #fff;
    --f-line: rgba(11, 18, 32, 0.1);
    --f-input: rgba(11, 18, 32, 0.06);
    --f-dialog: #fff;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial;
    color: var(--f-text);
    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: black; align-items: center; justify-content: center; gap: 4%; }
.right_part { display: flex; flex: 1; height: 100%; background-color: black; align-items: center; gap: 10%; }
.logo_img { height: 50px; width: auto; }
.logo_div { display: flex; align-items: center; padding-left: 1.1%; }
.logo_div a { display: flex; align-items: center; }
.header_link { position: relative; display: inline-block; font-size: 30px; color: rgb(42, 143, 255); text-decoration: none; }
.search_input { height: 45%; width: 70%; }
.theme_switch { width: 40px; height: 40px; background-color: rgb(42, 143, 255); border-radius: 10px; border: none; cursor: pointer; }

/* ---------- Форум ---------- */

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px 56px;
}

.forum {
    display: flex;
    min-height: calc(100vh - 76px - 88px);
    overflow: hidden;
    background: var(--f-panel);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    backdrop-filter: blur(24px) saturate(160%);
    border: 1px solid var(--f-line);
    border-radius: 28px;
    box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.6);
}

.cats {
    flex: none;
    width: 260px;
    padding: 22px 10px;
    background: var(--f-panel-2);
    border-right: 1px solid var(--f-line);
}

.cats h2 { margin: 0 12px 14px; font-size: 24px; letter-spacing: -0.02em; }

.cat {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 10px 12px;
    font: inherit;
    font-size: 16px;
    color: inherit;
    text-align: left;
    background: transparent;
    border: 0;
    border-radius: 14px;
    cursor: pointer;
    transition: background 0.2s;
}

.cat:hover { background: var(--f-card-hover); }
.cat.active { color: #fff; background: var(--f-accent); }
.cat .ic { width: 28px; text-align: center; font-weight: 700; }
.cat .name { flex: 1; font-weight: 600; }
.cat .count { font-size: 13px; opacity: 0.7; }

.board { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--f-line);
}

.toolbar h1 { margin: 0 auto 0 0; font-size: 24px; letter-spacing: -0.02em; }

.tabs { display: flex; gap: 4px; padding: 4px; background: var(--f-input); border-radius: 999px; }

.tab {
    padding: 7px 14px;
    font: inherit;
    font-size: 14px;
    color: var(--f-text-2);
    background: transparent;
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.tab.active { color: #fff; background: var(--f-accent); }

.btn_new, .btn_main {
    padding: 0 20px;
    height: 40px;
    font: inherit;
    font-weight: 600;
    color: #fff;
    background: var(--f-accent);
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.btn_new:hover, .btn_main:hover { background: rgb(74, 163, 255); }
.btn_new:active, .btn_main:active { transform: scale(0.96); }

.filter { padding: 16px 24px 0; }

.filter input, .field input, .field textarea, .field select {
    width: 100%;
    box-sizing: border-box;
    padding: 0 18px;
    height: 44px;
    font: inherit;
    color: var(--f-text);
    background: var(--f-input);
    border: 1px solid transparent;
    border-radius: 14px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.field textarea { height: 120px; padding: 12px 18px; resize: vertical; }
.field select option { color: #111; }
.filter input::placeholder, .field input::placeholder, .field textarea::placeholder { color: var(--f-text-3); }

.filter input:focus, .field input:focus, .field textarea:focus, .field select:focus {
    border-color: var(--f-accent);
    box-shadow: 0 0 0 4px rgba(42, 143, 255, 0.2);
}

.topics { display: flex; flex-direction: column; gap: 10px; padding: 16px 24px 24px; }

.topic {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 16px 18px;
    text-align: left;
    font: inherit;
    color: inherit;
    background: var(--f-card);
    border: 1px solid var(--f-line);
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.2s, transform 0.25s, border-color 0.2s;
}

.topic:hover { background: var(--f-card-hover); transform: translateY(-2px); border-color: rgba(42, 143, 255, 0.4); }

.avatar {
    flex: none;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    font-weight: 700;
    color: #fff;
    border-radius: 50%;
}

.t_main { flex: 1; min-width: 0; }
.t_title { font-size: 17px; font-weight: 600; margin-bottom: 6px; overflow-wrap: anywhere; }
.t_meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; color: var(--f-text-3); }

.tag {
    padding: 2px 10px;
    font-size: 12px;
    font-weight: 600;
    color: rgb(110, 180, 255);
    background: rgba(42, 143, 255, 0.15);
    border-radius: 999px;
}

html[data-theme="light"] .tag { color: #0a5fd0; }

.stats { display: flex; gap: 16px; flex: none; font-size: 14px; color: var(--f-text-2); }

.like {
    font: inherit;
    font-size: 14px;
    color: inherit;
    background: transparent;
    border: 0;
    cursor: pointer;
    transition: transform 0.2s;
}

.like:hover { transform: scale(1.12); }
.like.on { color: #ff453a; }

.empty { padding: 56px 24px; text-align: center; color: var(--f-text-3); }

/* Діалоги */
dialog {
    width: min(640px, calc(100vw - 32px));
    max-height: calc(100vh - 48px);
    padding: 0;
    color: var(--f-text);
    background: var(--f-dialog);
    border: 1px solid var(--f-line);
    border-radius: 24px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.6);
}

dialog::backdrop { background: rgba(0, 0, 0, 0.55); backdrop-filter: blur(6px); }
dialog[open] { animation: pop 0.3s cubic-bezier(0.22, 1, 0.36, 1); }
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(0.97); } }

.dlg { display: flex; flex-direction: column; max-height: calc(100vh - 48px); }
.dlg_head { display: flex; align-items: flex-start; gap: 12px; padding: 22px 24px 14px; }
.dlg_head h2 { margin: 0; flex: 1; font-size: 22px; letter-spacing: -0.02em; overflow-wrap: anywhere; }

.close {
    flex: none;
    width: 34px;
    height: 34px;
    font-size: 18px;
    color: var(--f-text-2);
    background: var(--f-input);
    border: 0;
    border-radius: 50%;
    cursor: pointer;
}

.dlg_body { padding: 0 24px 16px; overflow-y: auto; }
.post { display: flex; gap: 12px; padding: 12px 0; border-top: 1px solid var(--f-line); }
.post .avatar { width: 36px; height: 36px; font-size: 14px; }
.post b { font-size: 14px; }
.post small { margin-left: 8px; color: var(--f-text-3); }
.post p { margin: 4px 0 0; line-height: 1.5; overflow-wrap: anywhere; }
.dlg_foot { display: flex; gap: 10px; padding: 14px 24px 22px; border-top: 1px solid var(--f-line); }
.dlg_foot input { flex: 1; min-width: 0; height: 44px; padding: 0 18px; font: inherit; color: var(--f-text); background: var(--f-input); border: 1px solid transparent; border-radius: 999px; outline: none; }
.dlg_foot input:focus { border-color: var(--f-accent); }
.dlg_foot input::placeholder { color: var(--f-text-3); }
.field { padding: 0 24px 14px; }
.field label { display: block; margin: 0 0 6px 4px; font-size: 13px; color: var(--f-text-2); }
.dlg_actions { padding: 6px 24px 22px; }

@media (max-width: 860px) {
    main { padding: 12px; }
    .forum { flex-direction: column; }
    .cats { width: auto; display: flex; gap: 6px; overflow-x: auto; padding: 12px; border-right: 0; border-bottom: 1px solid var(--f-line); }
    .cats h2 { display: none; }
    .cat { width: auto; flex: none; padding: 8px 14px; }
    .cat .count, .cat .ic { display: none; }
    .stats { display: none; }
}

/* VIP-теми закріплені зверху */
.topic_vip { box-shadow: inset 3px 0 0 #ffd60a; }