/* ==========================================================================
   ChatHub — design system
   Aesthetic: editorial SaaS. Warm bone paper, deep forest accent,
   Fraunces (display) + DM Sans (body) + JetBrains Mono (code).
   ========================================================================== */

:root {
    --bg:        #F4F1EA;
    --paper:    #FFFCF6;
    --surface:   #FFFFFF;
    --ink:       #16140F;
    --ink-soft:  #2A2620;
    --muted:     #6B6557;
    --line:      #E5DFD2;
    --line-soft: #EFEAE0;

    --accent:        #1F4D3B;
    --accent-deep:   #15382A;
    --accent-soft:   #E8EFEA;

    --warn:    #B5781E;
    --warn-soft: #FBF1DE;
    --danger:  #8B2E2E;
    --danger-soft: #F6E6E2;
    --ok:      #1F4D3B;

    --c-messenger: #0084FF;
    --c-instagram: #E4405F;
    --c-telegram:  #229ED9;
    --c-gbm:       #34A853;

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

    --shadow-1: 0 1px 2px rgba(22,20,15,0.04), 0 1px 1px rgba(22,20,15,0.03);
    --shadow-2: 0 8px 24px -12px rgba(22,20,15,0.16), 0 2px 4px rgba(22,20,15,0.04);

    --font-display: 'Fraunces', ui-serif, Georgia, serif;
    --font-body:    'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body { overflow: hidden; }
body.guest { overflow: auto; }

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* Atmospheric paper texture — very subtle warm grain via radial gradients */
body::before {
    content: "";
    position: fixed; inset: 0;
    pointer-events: none;
    background:
        radial-gradient(1200px 600px at 90% -10%, rgba(31,77,59,0.04), transparent 60%),
        radial-gradient(800px 600px at -10% 110%, rgba(181,120,30,0.05), transparent 55%);
    z-index: 0;
}

/* ---------------- Layout shell ---------------- */
.shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 240px 1fr;
    height: 100vh;
}

.sidebar {
    background: var(--paper);
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    padding: 22px 16px 16px;
}

.brand {
    display: flex; align-items: center; gap: 10px;
    padding: 4px 6px 18px;
    border-bottom: 1px solid var(--line-soft);
    margin-bottom: 14px;
    color: var(--ink);
}
.brand-mark {
    width: 34px; height: 34px;
    display: grid; place-items: center;
    background: var(--ink);
    color: var(--paper);
    border-radius: 8px;
}
.brand-name {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    color: var(--ink-soft);
    font-weight: 500;
    transition: background 120ms ease, color 120ms ease;
}
.nav-item:hover { background: var(--line-soft); }
.nav-item.active {
    background: var(--ink);
    color: var(--paper);
}
.nav-item svg { opacity: 0.85; }

.sidebar-foot { border-top: 1px solid var(--line-soft); padding-top: 12px; }
.user-card { display: flex; align-items: center; gap: 10px; padding: 4px 6px; }
.user-avatar {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--accent); color: var(--paper);
    display: grid; place-items: center;
    font-weight: 600;
}
.user-meta { line-height: 1.2; min-width: 0; }
.user-name { font-weight: 600; font-size: 13px; }
.user-email { font-size: 11.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 160px; }
.logout {
    display: block; margin-top: 10px;
    padding: 8px 10px;
    color: var(--muted);
    font-size: 12.5px;
    border-radius: var(--radius-sm);
}
.logout:hover { color: var(--danger); background: var(--danger-soft); }

/* ---------------- Main canvas ---------------- */
.main {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg);
}

.topbar {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 18px 28px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
}
.topbar h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 30px;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--ink);
}
.topbar .sub {
    color: var(--muted);
    margin-top: 2px;
    font-size: 13px;
}

/* ---------------- Buttons ---------------- */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 9px 14px;
    border: 1px solid var(--line);
    background: var(--paper);
    color: var(--ink);
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: transform 80ms ease, background 120ms ease, border-color 120ms ease;
}
.btn:hover { background: var(--surface); }
.btn:active { transform: translateY(1px); }
.btn-primary {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}
.btn-primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn-accent {
    background: var(--accent);
    color: var(--paper);
    border-color: var(--accent);
}
.btn-accent:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--muted);
}
.btn-ghost:hover { background: var(--line-soft); color: var(--ink); }
.btn-danger {
    background: var(--paper);
    border-color: var(--danger);
    color: var(--danger);
}
.btn-danger:hover { background: var(--danger-soft); }

/* ---------------- Auth pages ---------------- */
.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 40px 20px;
    position: relative; z-index: 1;
}
.auth-card {
    width: 100%; max-width: 420px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    box-shadow: var(--shadow-2);
}
.auth-card h1 {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 36px;
    line-height: 1.1;
    margin: 0 0 8px;
    letter-spacing: -0.02em;
}
.auth-card .lede { color: var(--muted); margin-bottom: 24px; }
.auth-foot { margin-top: 20px; color: var(--muted); font-size: 13px; }
.auth-foot a { color: var(--accent); font-weight: 500; }

/* ---------------- Forms ---------------- */
.field { margin-bottom: 14px; }
.field label {
    display: block;
    font-size: 12.5px;
    font-weight: 500;
    color: var(--ink-soft);
    margin-bottom: 6px;
    letter-spacing: 0.01em;
}
.field .hint { font-size: 12px; color: var(--muted); margin-top: 5px; }
input[type=text], input[type=email], input[type=password], textarea, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: var(--radius-sm);
    font: inherit;
    color: var(--ink);
    transition: border-color 120ms, box-shadow 120ms;
}
textarea { font-family: var(--font-mono); font-size: 12.5px; resize: vertical; min-height: 100px; }
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.alert {
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-size: 13px;
    margin-bottom: 16px;
    border: 1px solid;
}
.alert-error { background: var(--danger-soft); color: var(--danger); border-color: rgba(139,46,46,0.2); }
.alert-success { background: var(--accent-soft); color: var(--accent-deep); border-color: rgba(31,77,59,0.2); }
.alert-warn { background: var(--warn-soft); color: var(--warn); border-color: rgba(181,120,30,0.25); }

/* ---------------- Channels page ---------------- */
.channels-grid {
    padding: 24px 28px;
    overflow: auto;
    flex: 1;
}
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}
.platform-card {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px 20px 18px;
    transition: border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
    position: relative;
}
.platform-card:hover {
    border-color: rgba(22,20,15,0.18);
    box-shadow: var(--shadow-1);
}
.platform-card .head {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 10px;
}
.platform-icon {
    width: 36px; height: 36px;
    border-radius: 8px;
    display: grid; place-items: center;
    color: white;
    font-weight: 700;
    font-family: var(--font-display);
}
.platform-card h3 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 19px;
    letter-spacing: -0.01em;
}
.platform-card .desc { color: var(--muted); font-size: 13px; min-height: 38px; }
.platform-card .actions { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.platform-card .meta {
    margin-top: 12px;
    border-top: 1px dashed var(--line);
    padding-top: 10px;
    font-size: 12px;
    color: var(--muted);
}

.status-pill {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 3px 9px;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 500;
    border: 1px solid;
}
.status-connected { background: var(--accent-soft); color: var(--accent-deep); border-color: rgba(31,77,59,0.18); }
.status-disconnected { background: var(--line-soft); color: var(--muted); border-color: var(--line); }
.status-error { background: var(--danger-soft); color: var(--danger); border-color: rgba(139,46,46,0.2); }
.status-pill::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: currentColor;
}

/* Connected channel list */
.connected-section {
    margin-bottom: 28px;
}
.section-head {
    display: flex; align-items: baseline; justify-content: space-between;
    margin-bottom: 12px;
}
.section-head h2 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 22px;
    letter-spacing: -0.01em;
}
.section-head .sub {
    color: var(--muted);
    font-size: 13px;
}

.connected-list {
    display: flex; flex-direction: column; gap: 8px;
}
.connected-row {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 14px 16px;
    display: grid;
    grid-template-columns: 36px 1fr auto;
    gap: 14px;
    align-items: center;
}
.connected-row .platform-icon { width: 32px; height: 32px; font-size: 13px; border-radius: 7px; }
.connected-row h4 {
    margin: 0;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 14px;
}
.connected-row .row-sub { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.connected-row .row-actions { display: flex; gap: 6px; }

/* ---------------- Modal ---------------- */
.modal-backdrop {
    position: fixed; inset: 0;
    background: rgba(22,20,15,0.55);
    backdrop-filter: blur(2px);
    display: none;
    align-items: center; justify-content: center;
    z-index: 50;
    padding: 24px;
}
.modal-backdrop.open { display: flex; }
.modal {
    width: 100%;
    max-width: 640px;
    max-height: 90vh;
    overflow: auto;
    background: var(--paper);
    border-radius: var(--radius-lg);
    box-shadow: 0 30px 60px -20px rgba(0,0,0,0.4);
    border: 1px solid var(--line);
}
.modal-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 22px 24px 14px;
    border-bottom: 1px solid var(--line-soft);
    position: sticky; top: 0;
    background: var(--paper);
    z-index: 1;
}
.modal-head h2 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 22px;
    letter-spacing: -0.01em;
    display: flex; align-items: center; gap: 10px;
}
.modal-body { padding: 18px 24px 22px; }
.modal-foot {
    padding: 14px 24px;
    border-top: 1px solid var(--line-soft);
    display: flex; justify-content: flex-end; gap: 8px;
    background: var(--paper);
}
.modal-close {
    background: transparent; border: 0; color: var(--muted);
    font-size: 22px; line-height: 1; padding: 4px 8px;
    border-radius: 6px;
}
.modal-close:hover { background: var(--line-soft); color: var(--ink); }

.steps { padding-left: 18px; margin: 0 0 16px; }
.steps li { margin-bottom: 6px; color: var(--ink-soft); font-size: 13.5px; }
.steps code, .webhook-box code {
    font-family: var(--font-mono);
    background: var(--line-soft);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 12px;
}

.webhook-box {
    margin: 14px 0 16px;
    background: var(--ink);
    color: var(--paper);
    border-radius: var(--radius);
    padding: 14px 16px;
    font-family: var(--font-mono);
    font-size: 12.5px;
    word-break: break-all;
    display: flex; align-items: center; gap: 12px;
    justify-content: space-between;
}
.webhook-box .label {
    font-family: var(--font-body);
    color: rgba(255,252,246,0.6);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 4px;
}
.copy-btn {
    background: rgba(255,252,246,0.1);
    color: var(--paper);
    border: 1px solid rgba(255,252,246,0.2);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 12px;
    flex-shrink: 0;
}
.copy-btn:hover { background: rgba(255,252,246,0.18); }

/* ---------------- Inbox layout ---------------- */
.inbox {
    display: grid;
    grid-template-columns: 320px 1fr;
    flex: 1;
    overflow: hidden;
    border-top: 1px solid var(--line);
}

.thread-list {
    background: var(--paper);
    border-right: 1px solid var(--line);
    display: flex; flex-direction: column;
    overflow: hidden;
}
.thread-filters {
    display: flex; gap: 6px; flex-wrap: wrap;
    padding: 12px 14px;
    border-bottom: 1px solid var(--line-soft);
}
.filter-chip {
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink-soft);
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}
.filter-chip:hover { border-color: var(--ink); }
.filter-chip.active {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.threads { flex: 1; overflow: auto; }
.thread-row {
    display: grid;
    grid-template-columns: 36px 1fr auto;
    gap: 10px;
    align-items: center;
    padding: 12px 14px;
    border-bottom: 1px solid var(--line-soft);
    cursor: pointer;
    transition: background 120ms ease;
}
.thread-row:hover { background: var(--line-soft); }
.thread-row.active { background: var(--accent-soft); }
.thread-avatar {
    position: relative;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--paper);
    font-weight: 600;
    display: grid; place-items: center;
    font-size: 13px;
}
.thread-platform-dot {
    position: absolute;
    bottom: -2px; right: -2px;
    width: 14px; height: 14px;
    border-radius: 50%;
    border: 2px solid var(--paper);
}
.thread-meta { min-width: 0; }
.thread-name {
    font-weight: 600;
    font-size: 13.5px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.thread-snippet {
    color: var(--muted);
    font-size: 12.5px;
    margin-top: 2px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    max-width: 220px;
}
.thread-aside { text-align: right; }
.thread-time { font-size: 11px; color: var(--muted); }
.unread-badge {
    margin-top: 4px;
    display: inline-block;
    background: var(--accent);
    color: var(--paper);
    font-size: 10.5px;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 999px;
    min-width: 20px;
    text-align: center;
}

.empty-list, .empty-conv {
    color: var(--muted);
    text-align: center;
    padding: 60px 24px;
    font-size: 13.5px;
}
.empty-list .em-title, .empty-conv .em-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 22px;
    color: var(--ink);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

/* ---------------- Conversation pane ---------------- */
.conv {
    display: flex; flex-direction: column;
    background: var(--bg);
    overflow: hidden;
}
.conv-head {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 20px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
}
.conv-head .who h3 {
    margin: 0; font-size: 15px; font-weight: 600;
}
.conv-head .who .src { font-size: 12px; color: var(--muted); margin-top: 2px; }
.conv-head .platform-tag {
    margin-left: auto;
    font-size: 11.5px;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--paper);
    color: var(--ink-soft);
    font-weight: 500;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px;
    display: flex; flex-direction: column; gap: 10px;
}
.bubble {
    max-width: 65%;
    padding: 9px 13px;
    border-radius: 14px;
    font-size: 13.5px;
    line-height: 1.45;
    white-space: pre-wrap;
    word-wrap: break-word;
    box-shadow: var(--shadow-1);
}
.bubble.in {
    align-self: flex-start;
    background: var(--paper);
    border: 1px solid var(--line);
    border-bottom-left-radius: 4px;
}
.bubble.out {
    align-self: flex-end;
    background: var(--ink);
    color: var(--paper);
    border-bottom-right-radius: 4px;
}
.bubble.out.failed {
    background: var(--danger);
}
.bubble .meta {
    margin-top: 4px;
    font-size: 10.5px;
    opacity: 0.65;
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

.composer {
    border-top: 1px solid var(--line);
    background: var(--paper);
    padding: 12px 16px;
    display: flex; gap: 10px; align-items: flex-end;
}
.composer textarea {
    flex: 1;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 10px 12px;
    font: inherit;
    background: var(--surface);
    min-height: 44px;
    max-height: 160px;
    resize: none;
}
.composer textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.composer .btn-send {
    background: var(--ink);
    color: var(--paper);
    border: 0;
    height: 44px;
    padding: 0 20px;
    border-radius: var(--radius);
    font-weight: 500;
    display: flex; align-items: center; gap: 6px;
}
.composer .btn-send:hover { background: var(--accent-deep); }
.composer .btn-send[disabled] { opacity: 0.5; cursor: not-allowed; }

/* Toast */
.toast {
    position: fixed; bottom: 22px; right: 22px;
    background: var(--ink);
    color: var(--paper);
    padding: 10px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    z-index: 100;
    box-shadow: var(--shadow-2);
    opacity: 0; transform: translateY(8px);
    transition: opacity 180ms ease, transform 180ms ease;
    pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: var(--danger); }
.toast.success { background: var(--accent); }

/* Platform color helpers */
.bg-messenger { background: var(--c-messenger); }
.bg-instagram { background: var(--c-instagram); }
.bg-telegram  { background: var(--c-telegram); }
.bg-gbm       { background: var(--c-gbm); }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(22,20,15,0.18);
    border-radius: 10px;
    border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: rgba(22,20,15,0.3); }

/* Responsive */
@media (max-width: 880px) {
    .shell { grid-template-columns: 64px 1fr; }
    .sidebar { padding: 14px 8px; }
    .brand-name, .nav-item span, .user-meta, .logout span { display: none; }
    .nav-item { justify-content: center; padding: 10px; }
    .user-card { justify-content: center; }
    .inbox { grid-template-columns: 280px 1fr; }
}
@media (max-width: 640px) {
    .inbox { grid-template-columns: 1fr; }
    .inbox.has-active .thread-list { display: none; }
    .inbox:not(.has-active) .conv { display: none; }
    .topbar { padding: 14px 18px; }
    .topbar h1 { font-size: 24px; }
}