:root {
    --bg-primary: #0a0a12;
    --bg-secondary: #10101a;
    --bg-tertiary: #16162a;
    --bg-hover: #1c1c32;
    --border: #1e1e36;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #f0a030;
    --accent-hover: #fbbf24;
    --cyan: #22d3ee;
    --green: #22c55e;
    --red: #ef4444;
    --purple: #a78bfa;
    --sidebar-w: 240px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

/* ── Login ────────────────────────────────────── */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: var(--bg-primary);
}
.login-box {
    text-align: center;
    width: 320px;
}
.login-box h1 {
    font-size: 28px;
    letter-spacing: 6px;
    color: var(--accent);
    margin-bottom: 4px;
}
.login-subtitle {
    color: var(--text-muted);
    font-size: 11px;
    letter-spacing: 3px;
    margin-bottom: 32px;
}
.login-box input {
    display: block;
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}
.login-box input:focus {
    border-color: var(--accent);
}
#login-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    letter-spacing: 2px;
    transition: background 0.2s;
}
#login-btn:hover { background: var(--accent-hover); }
.login-error {
    color: var(--red);
    font-size: 12px;
    margin-top: 12px;
    min-height: 18px;
}

/* ── Layout ───────────────────────────────────── */
#app {
    display: flex;
    height: 100vh;
}
.hidden { display: none !important; }

/* ── Sidebar ──────────────────────────────────── */
#sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}
.sidebar-header {
    padding: 20px 16px 12px;
    border-bottom: 1px solid var(--border);
}
.sidebar-header h2 {
    font-size: 16px;
    letter-spacing: 4px;
    color: var(--accent);
}
.sidebar-sub {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 2px;
}
.sidebar-nav {
    padding: 12px 8px;
}
.nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}
.nav-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-btn.active {
    background: var(--bg-tertiary);
    color: var(--accent);
}
.nav-icon { font-size: 16px; }
.unread-badge {
    position: absolute;
    right: 8px;
    background: var(--red);
    color: white;
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 10px;
    font-weight: bold;
}

/* Presence */
.sidebar-presence {
    flex: 1;
    padding: 12px 16px;
    overflow-y: auto;
}
.sidebar-presence h3 {
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 10px;
}
.presence-user {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 0;
    font-size: 13px;
}
.presence-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.presence-dot.online { background: var(--green); box-shadow: 0 0 6px var(--green); }
.presence-dot.offline { background: var(--text-muted); }
.presence-name { color: var(--text-secondary); }
.presence-name.online { color: var(--text-primary); }

/* Sidebar footer */
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}
#logout-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 4px;
}
#logout-btn:hover { color: var(--red); background: var(--bg-hover); }

/* ── Views ────────────────────────────────────── */
.view {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.view-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 56px;
}
.view-header h2 {
    font-size: 15px;
    font-weight: normal;
    color: var(--text-secondary);
}
.view-header-sub {
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}
.header-btn {
    margin-left: auto;
    padding: 6px 14px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 5px;
    font-family: inherit;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
}
.header-btn:hover { background: var(--accent-hover); }

/* ── Chat ─────────────────────────────────────── */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.msg {
    display: flex;
    gap: 10px;
    padding: 6px 0;
    transition: background 0.1s;
}
.msg:hover { background: var(--bg-secondary); margin: 0 -24px; padding: 6px 24px; }
.msg-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
    color: var(--bg-primary);
}
.msg-body { flex: 1; min-width: 0; }
.msg-header {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 2px;
}
.msg-name { font-size: 13px; font-weight: bold; }
.msg-time { font-size: 10px; color: var(--text-muted); }
.msg-text {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-word;
    white-space: pre-wrap;
}
.msg-file {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--cyan);
    font-size: 12px;
    text-decoration: none;
    margin-top: 4px;
}
.msg-file:hover { border-color: var(--cyan); }
/* Consecutive messages from same user: compact */
.msg.compact .msg-avatar { visibility: hidden; height: 0; margin-top: -4px; }
.msg.compact .msg-header { display: none; }
.msg.compact { padding-top: 0; }

/* Chat input */
.chat-input-bar {
    padding: 12px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: var(--bg-secondary);
}
#chat-input {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13px;
    resize: none;
    outline: none;
    max-height: 120px;
    line-height: 1.4;
}
#chat-input:focus { border-color: var(--accent); }
#send-btn {
    padding: 10px 14px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    flex-shrink: 0;
}
#send-btn:hover { background: var(--accent-hover); }
.upload-btn {
    font-size: 20px;
    cursor: pointer;
    padding: 6px;
    color: var(--text-muted);
    transition: color 0.15s;
}
.upload-btn:hover { color: var(--accent); }

/* ── Notes ────────────────────────────────────── */
.notes-layout {
    flex: 1;
    display: flex;
    overflow: hidden;
}
.notes-list {
    width: 280px;
    min-width: 280px;
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 8px;
}
.note-card {
    padding: 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s;
    margin-bottom: 4px;
}
.note-card:hover { background: var(--bg-hover); }
.note-card.active { background: var(--bg-tertiary); border-left: 3px solid var(--accent); }
.note-card-title {
    font-size: 13px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.note-card-meta {
    font-size: 10px;
    color: var(--text-muted);
}
.note-editor {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 20px 24px;
    gap: 12px;
}
.note-title-input {
    padding: 8px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 18px;
    font-weight: bold;
    outline: none;
}
.note-title-input:focus { border-color: var(--accent); }
.note-content-input {
    flex: 1;
    padding: 12px 0;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 13px;
    line-height: 1.6;
    resize: none;
    outline: none;
}
.note-meta {
    font-size: 10px;
    color: var(--text-muted);
}
.note-actions {
    display: flex;
    gap: 8px;
}
.note-action-btn {
    padding: 6px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
}
.note-action-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.note-action-btn.danger:hover { border-color: var(--red); color: var(--red); }

/* ── Calendar ─────────────────────────────────── */
.cal-nav-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-family: inherit;
}
.cal-nav-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    padding: 0 24px;
    background: var(--border);
    border: 1px solid var(--border);
    margin: 0 24px;
}
.cal-header-cell {
    background: var(--bg-secondary);
    padding: 8px;
    text-align: center;
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 1px;
}
.cal-cell {
    background: var(--bg-primary);
    padding: 6px 8px;
    min-height: 70px;
    cursor: pointer;
    transition: background 0.15s;
    position: relative;
}
.cal-cell:hover { background: var(--bg-secondary); }
.cal-cell.today { border-left: 2px solid var(--accent); }
.cal-cell.selected { background: var(--bg-tertiary); }
.cal-cell.other-month { opacity: 0.3; }
.cal-day-num { font-size: 11px; color: var(--text-secondary); margin-bottom: 4px; }
.cal-day-num.today { color: var(--accent); font-weight: bold; }
.cal-event-dot {
    display: block;
    font-size: 9px;
    padding: 1px 4px;
    border-radius: 3px;
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--bg-primary);
}
.calendar-events {
    padding: 16px 24px;
    max-height: 200px;
    overflow-y: auto;
}
.calendar-events h3 {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.cal-event-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    margin-bottom: 4px;
    font-size: 12px;
}
.cal-event-item .title { color: var(--text-primary); }
.cal-event-item .time { color: var(--text-muted); font-size: 10px; }
.cal-event-item .delete-event {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    padding: 0 4px;
}
.cal-event-item .delete-event:hover { color: var(--red); }

/* ── Pin Board ────────────────────────────────── */
.pin-board {
    flex: 1;
    padding: 20px 24px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 12px;
    align-content: start;
    overflow-y: auto;
}
.pin-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    position: relative;
    transition: border-color 0.15s;
}
.pin-card:hover { border-color: var(--accent); }
.pin-card-title { font-size: 14px; font-weight: bold; margin-bottom: 8px; }
.pin-card-content {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}
.pin-card-meta {
    margin-top: 10px;
    font-size: 10px;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}
.pin-card .delete-pin {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.15s;
}
.pin-card:hover .delete-pin { opacity: 1; }
.pin-card .delete-pin:hover { color: var(--red); }
.pin-category {
    display: inline-block;
    font-size: 9px;
    padding: 2px 6px;
    border-radius: 3px;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.pin-category.info { background: var(--cyan); color: var(--bg-primary); }
.pin-category.task { background: var(--accent); color: var(--bg-primary); }
.pin-category.important { background: var(--red); color: white; }
.pin-category.idea { background: var(--purple); color: var(--bg-primary); }

/* ── Sketch ───────────────────────────────────── */
.sketch-tools {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}
.sketch-tools input[type=color] {
    width: 32px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-secondary);
    cursor: pointer;
    padding: 0;
}
.sketch-tools input[type=range] {
    width: 80px;
    accent-color: var(--accent);
}
#sketch-canvas {
    flex: 1;
    cursor: crosshair;
    background: var(--bg-secondary);
    display: block;
}

/* ── Scrollbar ────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Mobile ───────────────────────────────────── */
/* ── Mobile Bottom Nav ────────────────────────── */
#mobile-nav {
    display: none;
}

@media (max-width: 768px) {
    :root { --sidebar-w: 0px; }
    #sidebar { display: none; }
    .notes-list { width: 100%; min-width: unset; }
    .note-editor { display: none; }
    .notes-layout.editing .notes-list { display: none; }
    .notes-layout.editing .note-editor { display: flex; }

    #mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 56px;
        background: var(--bg-secondary);
        border-top: 1px solid var(--border);
        z-index: 1000;
        justify-content: space-around;
        align-items: center;
        padding: 0 4px;
    }
    .mob-nav-btn {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2px;
        background: none;
        border: none;
        color: var(--text-muted);
        font-size: 18px;
        padding: 6px 8px;
        cursor: pointer;
        font-family: inherit;
        transition: color 0.15s;
    }
    .mob-nav-btn span {
        font-size: 9px;
        letter-spacing: 0.5px;
    }
    .mob-nav-btn.active {
        color: var(--accent);
    }

    /* Adjust views to not be hidden behind bottom nav */
    .view { padding-bottom: 60px !important; }
    .chat-input-bar { bottom: 56px; }
    #app { height: calc(100vh - 56px); }
}