/* ================================================================
   StudentOS — Study Forum Styles (forum.css)  v2
   ================================================================ */

/* ── View container ── */
#view-forum {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 860px;
    margin: 0 auto;
}

/* ================================================================
   LIST VIEW
   ================================================================ */
#forum-list-view { display: flex; flex-direction: column; height: 100%; gap: 0; }

/* Top bar — matches formula/music style exactly */
.forum-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 10px;
}
.forum-topbar h1 {
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: -.03em;
    line-height: 1.2;
}
.forum-topbar h1 span { color: var(--accent); }

/* Music page header — match other tabs */
.music-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 10px;
}
.music-page-header h1 {
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: -.03em;
    line-height: 1.2;
}
.music-page-header h1 span { color: var(--accent); }

/* Sort buttons */
.forum-sort-row {
    display: flex;
    gap: 6px;
    align-items: center;
    flex-wrap: wrap;
}
.forum-sort-btn {
    padding: 6px 14px;
    border-radius: 99px;
    font-size: .75rem;
    font-weight: 700;
    color: var(--text-muted);
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.07);
    cursor: pointer;
    transition: all .15s;
}
.forum-sort-btn.active,
.forum-sort-btn:hover {
    background: var(--accent);
    color: #fff;
    border-color: transparent;
}

/* Subject pills */
#forum-subject-bar {
    display: flex;
    gap: 7px;
    overflow-x: auto;
    padding-bottom: 6px;
    margin-bottom: 16px;
    scrollbar-width: none;
}
#forum-subject-bar::-webkit-scrollbar { display: none; }

.forum-subject-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 99px;
    font-size: .75rem;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
    border: 1px solid rgba(255,255,255,.07);
    background: var(--glass-panel);
    color: var(--text-muted);
    transition: all .15s;
    flex-shrink: 0;
}
.forum-subject-pill.active,
.forum-subject-pill:hover {
    background: color-mix(in srgb, var(--sc) 18%, transparent);
    border-color: color-mix(in srgb, var(--sc) 35%, transparent);
    color: var(--sc);
}

/* Post list */
#forum-post-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-bottom: 100px;
}

/* Post card */
.forum-post-card {
    display: flex;
    gap: 14px;
    padding: 16px 18px;
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.07);
    border-radius: 18px;
    cursor: pointer;
    transition: background .15s, transform .12s, border-color .15s;
}
.forum-post-card:hover {
    background: var(--glass-hover);
    border-color: rgba(255,255,255,.13);
    transform: translateY(-1px);
}
.forum-post-card.solved { border-color: rgba(34,197,94,.25); }

/* Left vote column */
.fpc-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    min-width: 38px;
}
.fpc-vote {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 8px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,.09);
    background: transparent;
    color: var(--text-muted);
    font-size: .7rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .15s;
    line-height: 1;
}
.fpc-vote:hover, .fpc-vote.voted {
    background: rgba(59,130,246,.15);
    border-color: rgba(59,130,246,.35);
    color: #3b82f6;
}
.fpc-vote i { font-size: .9rem; }
.fpc-replies-count {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-size: .65rem;
    color: var(--text-muted);
    line-height: 1;
}
.fpc-replies-count i { font-size: .8rem; }

/* Right body */
.fpc-body { flex: 1; min-width: 0; }
.fpc-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    flex-wrap: wrap;
}
.fpc-subject-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: .65rem;
    font-weight: 800;
    letter-spacing: .02em;
}
.fpc-solved-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: .65rem;
    font-weight: 800;
    background: rgba(34,197,94,.15);
    color: #22c55e;
}
.fpc-title {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -.01em;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.fpc-excerpt {
    font-size: .82rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.fpc-footer {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.fpc-author { font-size: .75rem; font-weight: 600; color: var(--text-muted); }
.fpc-dot    { font-size: .6rem;  color: var(--text-muted); }
.fpc-time   { font-size: .72rem; color: var(--text-muted); }

.fpc-delete {
    margin-left: auto;
    padding: 4px 8px;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: .72rem;
    cursor: pointer;
    transition: color .15s, background .15s;
    opacity: 0;
    transition: opacity .15s, color .15s, background .15s;
}
.forum-post-card:hover .fpc-delete { opacity: 1; }
.fpc-delete:hover { color: #ef4444; background: rgba(239,68,68,.1); }

.forum-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 60px 20px;
    color: var(--text-muted);
}
.forum-empty i   { font-size: 2.5rem; opacity: .4; }
.forum-empty p   { font-size: .9rem; }

.forum-avatar {
    width: 24px; height: 24px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: .6rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}

/* ================================================================
   FAB — FIXED: always on top, proper position
   ================================================================ */
#forum-fab {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 200;          /* higher than sidebar (z-50) */
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 22px;
    border-radius: 99px;
    background: var(--accent);
    color: #fff;
    font-size: .88rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 8px 28px rgba(59,130,246,.5);
    border: none;
    transition: transform .15s, box-shadow .15s;
    pointer-events: all;
}
#forum-fab:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(59,130,246,.6); }
#forum-fab:active { transform: scale(.96); }
#forum-fab i { font-size: 1rem; }

@media (max-width: 768px) {
    #forum-fab { bottom: calc(var(--mob-nav-h, 74px) + 12px); right: 16px; padding: 12px 18px; }
}

/* ================================================================
   NEW POST PANEL
   ================================================================ */
#forum-new-panel {
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 20px;
    padding: 22px 22px 18px;
    margin-bottom: 16px;
    animation: fadeIn .18s;
}
#forum-new-panel h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}
#forum-new-title, #forum-new-body, #forum-new-subject {
    width: 100%;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 12px;
    padding: 12px 14px;
    font-size: .9rem;
    color: var(--text-main);
    outline: none;
    transition: border-color .15s;
    box-sizing: border-box;
    margin-bottom: 10px;
    font-family: inherit;
}
#forum-new-title:focus, #forum-new-body:focus, #forum-new-subject:focus {
    border-color: var(--accent);
}
#forum-new-body { resize: none; min-height: 90px; line-height: 1.6; }
#forum-new-subject { cursor: pointer; }
#forum-new-subject option { background: var(--bg-color); }
.forum-new-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 10px;
    margin-top: 4px;
    flex-wrap: wrap;
}
.forum-new-cancel {
    padding: 9px 18px;
    border-radius: 12px;
    background: transparent;
    border: 1px solid rgba(255,255,255,.1);
    color: var(--text-muted);
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s;
}
.forum-new-cancel:hover { background: var(--glass-hover); }
#forum-submit-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 12px;
    background: var(--accent);
    color: #fff;
    font-size: .85rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: opacity .15s;
}
#forum-submit-btn:hover { opacity: .9; }
#forum-submit-btn:disabled { opacity: .6; cursor: not-allowed; }
#forum-new-error, #forum-reply-error {
    font-size: .75rem;
    color: #f87171;
    min-height: 18px;
    margin-bottom: 4px;
}

/* ================================================================
   THREAD VIEW
   ================================================================ */
#forum-thread-view {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    padding-bottom: 32px;
}
#forum-thread-content { flex: 1; }

.ft-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.ft-back {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 10px;
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.08);
    color: var(--text-muted);
    font-size: .8rem;
    font-weight: 700;
    cursor: pointer;
    transition: background .15s;
}
.ft-back:hover { background: var(--glass-hover); color: var(--text-main); }

.ft-title {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -.02em;
    line-height: 1.3;
    margin-bottom: 14px;
}

.ft-post-body {
    font-size: .95rem;
    line-height: 1.75;
    color: var(--text-main);
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.07);
    border-radius: 14px;
    padding: 16px 18px;
    margin-bottom: 14px;
}

.ft-post-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,.07);
    flex-wrap: wrap;
}
.ft-actions {
    margin-left: auto;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.ft-vote-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 10px;
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.09);
    color: var(--text-muted);
    font-size: .78rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .15s;
}
.ft-vote-btn.voted, .ft-vote-btn:hover {
    background: rgba(59,130,246,.15);
    border-color: rgba(59,130,246,.3);
    color: #3b82f6;
}
.ft-action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 10px;
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.09);
    color: var(--text-muted);
    font-size: .78rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .15s;
}
.ft-delete-btn:hover { color: #ef4444; background: rgba(239,68,68,.1); border-color: rgba(239,68,68,.25); }
.ft-solve-btn:hover  { color: #22c55e; background: rgba(34,197,94,.1);  border-color: rgba(34,197,94,.25); }

.ft-replies-label {
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 20px 0 12px;
}
.ft-no-replies { font-size: .85rem; color: var(--text-muted); padding: 8px 0 16px; }

.ft-reply {
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.07);
    border-radius: 14px;
    padding: 14px 16px;
    margin-bottom: 8px;
    transition: border-color .15s;
}
.ft-reply.is-answer {
    border-color: rgba(34,197,94,.3);
    background: rgba(34,197,94,.04);
}
.ft-reply-header {
    display: flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.ft-answer-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 99px;
    font-size: .62rem;
    font-weight: 800;
    background: rgba(34,197,94,.15);
    color: #22c55e;
}
.ft-reply-body {
    font-size: .88rem;
    line-height: 1.65;
    color: var(--text-main);
}
.ft-reply-delete {
    margin-left: auto;
    padding: 3px 8px;
    border-radius: 7px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: .7rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity .15s, color .15s, background .15s;
}
.ft-reply:hover .ft-reply-delete { opacity: 1; }
.ft-reply-delete:hover { color: #ef4444; background: rgba(239,68,68,.1); }

/* Reply composer */
.ft-reply-box {
    margin-top: 16px;
    background: var(--glass-panel);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 16px;
    padding: 16px;
}
#forum-reply-input {
    width: 100%;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 12px;
    padding: 12px 14px;
    font-size: .88rem;
    color: var(--text-main);
    outline: none;
    resize: none;
    min-height: 80px;
    transition: border-color .15s;
    box-sizing: border-box;
    font-family: inherit;
    margin-bottom: 10px;
}
#forum-reply-input:focus { border-color: var(--accent); }

#forum-reply-btn {
    float: right;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 12px;
    background: var(--accent);
    color: #fff;
    font-size: .85rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: opacity .15s;
}
#forum-reply-btn:hover { opacity: .9; }
#forum-reply-btn:disabled { opacity: .6; cursor: not-allowed; }
.ft-reply-box::after { content: ''; display: table; clear: both; }

/* ================================================================
   MOBILE
   ================================================================ */
@media (max-width: 768px) {
    #view-forum { max-width: 100%; }
    .forum-topbar { margin-bottom: 12px; }
    .forum-topbar h1 { font-size: 1.4rem; }
    .forum-post-card { padding: 12px 14px; gap: 10px; }
    .fpc-title { font-size: .92rem; }
    .fpc-delete { opacity: 1; }
    .ft-title { font-size: 1.2rem; }
    .ft-post-body { padding: 12px 14px; }
    .ft-actions { margin-left: 0; width: 100%; }
    .ft-reply-box { margin-top: 12px; }
}

/* Constrain inline images in forum posts */
.ft-post-body img,
.fpc-excerpt img,
.forum-post-card img {
    max-width: 100%;
    max-height: 320px;
    border-radius: 8px;
    object-fit: contain;
    display: block;
    margin: 8px 0;
}

/* PDF attachment chips in forum posts */
.ft-post-body a[href^="data:application/pdf"],
.ft-post-body .fap-att-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 8px;
    background: rgba(239,68,68,.1);
    border: 1px solid rgba(239,68,68,.2);
    color: #f87171;
    font-size: .72rem;
    text-decoration: none;
}