/* =========================================================
   ChatHub — Design tokens
   Palette: inchiostro notturno con accento corallo caldo
   ========================================================= */
:root {
    --ink-950: #14161f;
    --ink-900: #1b1e2b;
    --ink-800: #242838;
    --ink-700: #313649;
    --ink-600: #454b63;
    --ink-400: #7a8099;
    --ink-200: #c4c8d6;
    --paper: #f5f4f1;

    --coral: #e8734a;
    --coral-dark: #c85a35;
    --coral-light: #f3a680;
    --teal: #4a9a8f;
    --gold: #d4a94e;
    --danger: #d1523f;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --font-display: 'Georgia', 'Iowan Old Style', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-body);
    background: var(--ink-950);
    color: var(--paper);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---------- Topbar ---------- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: var(--ink-900);
    border-bottom: 1px solid var(--ink-700);
    position: sticky;
    top: 0;
    z-index: 20;
}
.topbar-brand {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}
.back-link { text-decoration: none; color: var(--ink-400); font-size: 14px; margin-right: 4px; }
.topbar-user { display: flex; align-items: center; gap: 12px; font-size: 14px; }

/* ---------- Badges ---------- */
.badge {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 3px 8px;
    border-radius: 20px;
    font-weight: 700;
}
.badge-admin { background: var(--coral); color: var(--ink-950); }
.badge-moderator { background: var(--teal); color: var(--ink-950); }
.badge-user { background: var(--ink-700); color: var(--ink-200); }

.mini-badge {
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.05em;
    padding: 1px 5px;
    border-radius: 4px;
    vertical-align: middle;
    margin-left: 4px;
}
.mini-badge-admin { background: var(--coral); color: var(--ink-950); }
.mini-badge-mod { background: var(--teal); color: var(--ink-950); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.1s ease, opacity 0.15s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--coral); color: #fff; }
.btn-primary:hover { background: var(--coral-dark); }
.btn-outline { background: transparent; border: 1px solid var(--ink-600); color: var(--ink-200); }
.btn-sm { padding: 5px 12px; font-size: 12.5px; }
.btn-icon {
    background: transparent;
    border: none;
    color: var(--ink-200);
    font-size: 18px;
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    line-height: 1;
}
.btn-icon:hover { background: var(--ink-800); }
.btn-danger { background: var(--danger); color: #fff; }

/* ---------- Auth pages ---------- */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(ellipse at top, var(--ink-800), var(--ink-950));
}
.auth-box {
    background: var(--ink-900);
    border: 1px solid var(--ink-700);
    padding: 40px;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 380px;
}
.auth-box h1 {
    font-family: var(--font-display);
    margin: 0 0 4px;
    font-size: 26px;
}
.subtitle { color: var(--ink-400); margin: 0 0 24px; font-size: 14px; }
.auth-form { display: flex; flex-direction: column; gap: 6px; }
.auth-form label { font-size: 13px; color: var(--ink-200); margin-top: 10px; }
.auth-form input {
    background: var(--ink-800);
    border: 1px solid var(--ink-700);
    color: var(--paper);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 14px;
}
.auth-form input:focus { outline: 2px solid var(--coral); border-color: var(--coral); }
.auth-form .btn { margin-top: 20px; }
.auth-switch { margin-top: 20px; font-size: 13px; color: var(--ink-400); text-align: center; }
.auth-switch a { color: var(--coral-light); font-weight: 600; text-decoration: none; }

.alert { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 13.5px; margin-bottom: 12px; }
.alert-error { background: rgba(209, 82, 63, 0.15); color: #f0a599; border: 1px solid rgba(209,82,63,0.4); }
.alert-success { background: rgba(74, 154, 143, 0.15); color: #9fd9cd; border: 1px solid rgba(74,154,143,0.4); }

/* ---------- Rooms grid ---------- */
.rooms-container { max-width: 960px; margin: 0 auto; padding: 40px 24px; }
.rooms-container h1 { font-family: var(--font-display); font-size: 30px; margin-bottom: 4px; }
.rooms-subtitle { color: var(--ink-400); margin-top: 0; margin-bottom: 32px; }
.rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.room-card {
    background: var(--ink-900);
    border: 1px solid var(--ink-700);
    border-radius: var(--radius-lg);
    padding: 22px;
    text-decoration: none;
    color: var(--paper);
    transition: border-color 0.15s ease, transform 0.15s ease;
    display: block;
}
.room-card:hover { border-color: var(--coral); transform: translateY(-2px); }
.room-icon { font-size: 32px; margin-bottom: 10px; }
.room-name { font-family: var(--font-display); font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.room-desc { font-size: 13px; color: var(--ink-400); line-height: 1.4; }
.room-activity { margin-top: 10px; font-size: 11px; color: var(--coral-light); font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; }

/* ---------- Chat layout ---------- */
.chat-page { display: flex; flex-direction: column; height: 100vh; height: 100dvh; }
.chat-main { flex: 1; display: flex; flex-direction: column; overflow: hidden; max-width: 820px; width: 100%; margin: 0 auto; }

.messages-list {
    flex: 1;
    overflow-y: auto;
    padding: 20px 16px 8px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.loading, .empty-state { color: var(--ink-400); text-align: center; padding: 40px 0; font-size: 14px; }

.message {
    background: var(--ink-900);
    border: 1px solid var(--ink-800);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    max-width: 78%;
    align-self: flex-start;
    cursor: pointer;
    transition: background 0.15s ease;
}
.message:hover { background: var(--ink-800); }
.message-own { align-self: flex-end; background: rgba(232, 115, 74, 0.14); border-color: rgba(232, 115, 74, 0.3); }
.message-own:hover { background: rgba(232, 115, 74, 0.22); }
.message-highlight { outline: 2px solid var(--gold); }
.message-deleted { opacity: 0.55; cursor: default; }
.message-deleted:hover { background: var(--ink-900); }

.msg-header { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 4px; }
.msg-author { font-weight: 700; font-size: 13.5px; color: var(--coral-light); }
.message-own .msg-author { color: var(--gold); }
.msg-time { font-size: 11px; color: var(--ink-400); white-space: nowrap; }
.msg-body { font-size: 14.5px; line-height: 1.45; white-space: pre-wrap; word-break: break-word; }

.msg-reply-ref, .msg-quote-ref {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--ink-800);
    border-left: 3px solid var(--teal);
    border-radius: 4px;
    padding: 5px 9px;
    margin-bottom: 6px;
    font-size: 12.5px;
    cursor: pointer;
}
.msg-quote-ref { border-left-color: var(--gold); }
.ref-user { font-weight: 700; color: var(--ink-200); }
.ref-text { color: var(--ink-400); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.msg-attachment { margin-top: 8px; }
.msg-attachment img, .msg-attachment video {
    max-width: 100%;
    max-height: 320px;
    border-radius: var(--radius-sm);
    display: block;
}

/* ---------- Composer ---------- */
.reply-preview {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--ink-800);
    border-top: 1px solid var(--ink-700);
    padding: 8px 16px;
    font-size: 13px;
}
.reply-preview-content { display: flex; flex-direction: column; gap: 1px; overflow: hidden; }
.reply-preview-label { font-weight: 700; color: var(--coral-light); font-size: 12.5px; }
.reply-preview-text { color: var(--ink-400); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 500px; }

.message-form {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    padding: 12px 16px;
    background: var(--ink-900);
    border-top: 1px solid var(--ink-700);
    position: relative;
}
.message-form textarea {
    flex: 1;
    resize: none;
    background: var(--ink-800);
    border: 1px solid var(--ink-700);
    color: var(--paper);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    font-size: 14.5px;
    font-family: inherit;
    max-height: 120px;
}
.message-form textarea:focus { outline: none; border-color: var(--coral); }
.attachment-name { font-size: 11.5px; color: var(--ink-400); max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.emoji-picker {
    position: absolute;
    bottom: 60px;
    left: 16px;
    background: var(--ink-800);
    border: 1px solid var(--ink-700);
    border-radius: var(--radius-md);
    padding: 10px;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 4px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    z-index: 30;
}
.emoji-item { background: none; border: none; font-size: 20px; cursor: pointer; padding: 4px; border-radius: 4px; }
.emoji-item:hover { background: var(--ink-700); }

/* ---------- Home layout con sidebar utenti ---------- */
.home-layout {
    display: flex;
    max-width: 1180px;
    margin: 0 auto;
    gap: 24px;
    align-items: flex-start;
    padding: 0 24px;
}
.home-layout .rooms-container { flex: 1; padding-left: 0; padding-right: 0; margin: 0; }

.users-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: var(--ink-900);
    border: 1px solid var(--ink-700);
    border-radius: var(--radius-lg);
    padding: 18px;
    margin-top: 40px;
    position: sticky;
    top: 80px;
}
.users-sidebar h2 {
    font-family: var(--font-display);
    font-size: 16px;
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.unread-badge {
    background: var(--coral);
    color: #fff;
    font-size: 11px;
    font-weight: 800;
    padding: 1px 7px;
    border-radius: 10px;
}
.users-list { display: flex; flex-direction: column; gap: 2px; max-height: 60vh; overflow-y: auto; }
.user-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--paper);
    font-size: 13.5px;
}
.user-row:hover { background: var(--ink-800); }
.user-status-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-online { background: #4caf7d; box-shadow: 0 0 5px #4caf7d; }
.dot-offline { background: var(--ink-600); }

.visibility-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 13px;
    user-select: none;
}
.visibility-toggle input { cursor: pointer; }

@media (max-width: 860px) {
    .home-layout { flex-direction: column; }
    .users-sidebar { width: 100%; margin-top: 20px; position: static; }
}

/* ---------- Context menu ---------- */
.context-menu {
    position: absolute;
    background: var(--ink-800);
    border: 1px solid var(--ink-700);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    overflow: hidden;
    z-index: 50;
    min-width: 170px;
}
.context-menu button {
    display: block;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    color: var(--paper);
    padding: 10px 16px;
    font-size: 14px;
    cursor: pointer;
}
.context-menu button:hover { background: var(--ink-700); }

/* ---------- Admin ---------- */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 220px;
    background: var(--ink-900);
    border-right: 1px solid var(--ink-700);
    padding: 20px 0;
    flex-shrink: 0;
}
.admin-sidebar .brand { font-family: var(--font-display); font-size: 18px; padding: 0 20px 16px; }
.admin-sidebar a {
    display: block;
    padding: 10px 20px;
    color: var(--ink-200);
    text-decoration: none;
    font-size: 14px;
}
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--ink-800); color: var(--coral-light); border-left: 3px solid var(--coral); padding-left: 17px; }
.admin-content { flex: 1; padding: 30px 36px; max-width: 1200px; }
.admin-content h1 { font-family: var(--font-display); margin-top: 0; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 32px; }
.stat-card { background: var(--ink-900); border: 1px solid var(--ink-700); border-radius: var(--radius-lg); padding: 20px; }
.stat-value { font-size: 30px; font-weight: 800; font-family: var(--font-display); color: var(--coral-light); }
.stat-label { font-size: 12.5px; color: var(--ink-400); text-transform: uppercase; letter-spacing: 0.03em; margin-top: 4px; }

table.admin-table { width: 100%; border-collapse: collapse; background: var(--ink-900); border-radius: var(--radius-md); overflow: hidden; }
table.admin-table th, table.admin-table td { padding: 10px 14px; text-align: left; font-size: 13.5px; border-bottom: 1px solid var(--ink-800); }
table.admin-table th { color: var(--ink-400); text-transform: uppercase; font-size: 11px; letter-spacing: 0.03em; }
table.admin-table tr:hover td { background: var(--ink-800); }
.admin-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.admin-actions form { display: inline; }

.select-inline { background: var(--ink-800); color: var(--paper); border: 1px solid var(--ink-700); border-radius: 4px; padding: 4px 6px; font-size: 12.5px; }

@media (max-width: 720px) {
    .admin-layout { flex-direction: column; }
    .admin-sidebar { width: 100%; display: flex; overflow-x: auto; padding: 8px; }
    .admin-sidebar .brand { display: none; }
    .admin-sidebar a { white-space: nowrap; padding: 8px 14px; }
    .message { max-width: 90%; }
}