/* ═══ sidebar.css — Sidebar minimalista estilo shadcn/ui ═══ */

.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    position: fixed;
    height: 100vh;
    overflow: visible;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-slow);
}
.sidebar .nav-items {
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-2);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Collapsed state */
.sidebar.collapsed { width: 56px; }
.sidebar.collapsed .sidebar-header h2,
.sidebar.collapsed .sidebar-header .prompt,
.sidebar.collapsed .sidebar-date,
.sidebar.collapsed .sidebar-stats,
.sidebar.collapsed .sidebar-clock,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .nav-item .prefix {
    display: none;
}
.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: var(--space-2);
    gap: 0;
}
.sidebar.collapsed .sidebar-header {
    padding: var(--space-3) var(--space-2);
    text-align: center;
    min-height: 48px;
}

/* Toggle button */
.sidebar-toggle-btn {
    position: absolute;
    top: 14px;
    right: -14px;
    width: 28px;
    height: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.65rem;
    z-index: 110;
    transition: color var(--transition-fast),
                border-color var(--transition-fast),
                background-color var(--transition-fast);
}
.sidebar-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: var(--bg-muted);
}
.sidebar-toggle-btn i {
    transition: transform var(--transition-slow);
}
.sidebar.collapsed .sidebar-toggle-btn i {
    transform: rotate(180deg);
}

/* Header */
.sidebar-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--sidebar-border);
    min-height: 56px;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}
.sidebar-header h2 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    letter-spacing: -0.025em;
}
.sidebar-header .prompt {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Nav items */
.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--sidebar-text);
    border-radius: var(--radius-md);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    transition: background-color var(--transition-fast),
                color var(--transition-fast);
}
.nav-item:hover {
    background: var(--sidebar-item-hover);
    color: var(--sidebar-text-active);
}
.nav-item.active {
    background: var(--sidebar-item-active);
    color: var(--sidebar-text-active);
}
.nav-item i {
    width: 18px;
    text-align: center;
    font-size: 0.95rem;
    color: var(--sidebar-icon);
    flex-shrink: 0;
    transition: color var(--transition-fast);
}
.nav-item:hover i,
.nav-item.active i {
    color: var(--sidebar-icon-active);
}
.nav-item .prefix {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    font-family: var(--font-mono);
}

/* Section label */
.sidebar-section-title,
.sidebar-section-label {
    padding: var(--space-4) var(--space-3) var(--space-1);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Clock */
.sidebar-clock {
    padding: var(--space-3) var(--space-4) var(--space-1);
    text-align: left;
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: 1px;
    border-top: 1px solid var(--sidebar-border);
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
    position: relative;
    line-height: 1.3;
}
.sidebar-clock .clock-separator {
    animation: blinkSep 1s step-end infinite;
    display: inline-block;
    color: var(--text-muted);
}
.sidebar-clock .clock-ghost {
    position: absolute;
    top: var(--space-3);
    left: var(--space-4);
    font-size: 1.25rem;
    letter-spacing: 1px;
    color: var(--bg-muted);
    opacity: 0.5;
    pointer-events: none;
    user-select: none;
    line-height: 1.3;
}
@keyframes blinkSep {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0.3; }
}

.sidebar-date {
    padding: 0 var(--space-4) var(--space-3);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    letter-spacing: 0.05em;
    text-transform: lowercase;
    font-family: var(--font-mono);
}

/* Stats */
.sidebar-stats {
    padding: var(--space-3) var(--space-4) var(--space-4);
    border-top: 1px solid var(--sidebar-border);
}
.sidebar-stats p {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin: var(--space-1) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
}
.sidebar-stats strong {
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
}

/* Save indicator */
.save-dot {
    display: inline-block;
    width: 6px; height: 6px;
    border-radius: 50%;
    margin-left: 6px;
    vertical-align: middle;
    background: transparent;
    transition: background var(--transition-fast);
}
.save-dot.saving {
    background: var(--warning);
    animation: savePulse 0.6s ease-in-out infinite;
}
.save-dot.saved { background: var(--success); }
@keyframes savePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* Footer del sidebar (nuevo) */
.sidebar-footer {
    padding: var(--space-3) var(--space-2);
    border-top: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    gap: 2px;
}